mirror of
https://gitlab.com/libvirt/libvirt.git
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959 lines
34 KiB
XML
959 lines
34 KiB
XML
<?xml version="1.0"?>
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<!-- libvirt release notes
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This file will be processed to produce both HTML and plain text versions
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of the release notes.
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Keep the style consistent with existing entries as much as possible.
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Each change should be documented by a short, one-sentence summary, which
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should fit in a single line and should not contain any formatting tags.
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You can optionally add a description if you feel like the summary alone is
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not enough to document the change accurately. The description may contain
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a <code> tag for switching to non-proportional font. No other tags are
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allowed.
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Lines should be kept under 80 columns, and should not exceed 100 columns.
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This file is validated against docs/news.rng schema.
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Use the following template to add a new release section:
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<release version="FIXME" date="unreleased">
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<section title="New features">
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</section>
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<section title="Improvements">
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</section>
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<section title="Bug fixes">
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</section>
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</release>
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-->
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<libvirt>
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<release version="v3.4.0" date="unreleased">
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<section title="New features">
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</section>
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<section title="Improvements">
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<change>
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<summary>
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qemu: Use GICv2 by default for aarch64/virt TCG guests
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</summary>
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<description>
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The emulated GICv3 has some limitations that make it unusable as a
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default; use GICv2 until they're sorted out. This change makes it
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once again possible to run aarch64/virt guests on a x86_64 host
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without having to tweak their configuration.
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</description>
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</change>
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</section>
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<section title="Bug fixes">
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</section>
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</release>
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<release version="v3.3.0" date="2017-05-05">
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<section title="New features">
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<change>
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<summary>
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net: Add support for coalesce settings
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</summary>
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<description>
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Enabling data batching through these settings can improve network
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performance for guests.
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</description>
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</change>
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<change>
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<summary>
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qemu: Add support for guest CPU cache specification
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</summary>
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<description>
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This features allows fine-grained control of the cache behavior
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of the guest CPU.
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</description>
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</change>
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<change>
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<summary>
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qemu: Add support for the qemu-xhci USB controller
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</summary>
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</change>
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</section>
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<section title="Improvements">
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<change>
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<summary>
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hyperv: Support Hyper-V 2012 and newer
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</summary>
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<description>
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Starting with Hyper-V 2012 the API has changed causing the existing
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driver to be unable to send and process requests properly. This has
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been resolved by adding abstractions to handle the differences and
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ease handling such breaks if they happen in the future.
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</description>
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</change>
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<change>
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<summary>
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libxl: Add support for nested HVM domains
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</summary>
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<description>
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Xen has supported nested HVM domains since version 4.4. The
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libvirt libxl driver now supports nested HVM domains by
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specifying the host-passthrough CPU mode when defining a
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domain.
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</description>
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</change>
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<change>
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<summary>
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qemu: Implement ACPI support for aarch64 guests
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</summary>
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<description>
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Up until this point, ACPI support was only advertised for x86_64
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guests and disabling it for aarch64 guests was not possible at all.
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</description>
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</change>
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<change>
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<summary>
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vz: Add support for changing the number of vCPUs
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</summary>
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</change>
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<change>
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<summary>
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qemu: Automatically choose the best USB controller for guests
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</summary>
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<description>
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The recently introduced qemu-xhci USB controller is the best choice
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for both ppc64 and aarch64 guests, so use it by default on those
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architectures if available.
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</description>
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</change>
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<change>
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<summary>
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daemon: Increase default task limit for libvirtd
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</summary>
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<description>
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The default number of tasks for the pids cgroup controller is 512,
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which libvirtd can quickly bump into when starting lots of guests.
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Raise the limit to a more reasonable 32768.
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</description>
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</change>
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<change>
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<summary>
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docs: Include man pages describing key code names and values
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</summary>
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</change>
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<change>
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<summary>
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virsh: Report initialization errors
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</summary>
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<description>
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Sometimes virsh might be unable to start: when that happens, report
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useful diagnostics instead of failing silently.
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</description>
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</change>
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</section>
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<section title="Bug fixes">
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<change>
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<summary>
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nss: Don't require a network restart for libvirt_guest
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</summary>
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<description>
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Previously, the libvirt_guest NSS module would only work properly
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after the corresponding network had been restarted; now newly
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started guests will be reported correctly right away.
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</description>
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</change>
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<change>
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<summary>
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storage: Remove unavailable transient pools after restart
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</summary>
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<description>
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Solve an issue where transient storage pools would be stuck in an
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unmanageable state if the source disappeared and libvirtd was
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subsequently restarted.
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</description>
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</change>
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<change>
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<summary>
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storage: Fix capacity value for LUKS encrypted volumes
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</summary>
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<description>
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The 'capacity' value (e.g. guest logical size) for a LUKS volume is
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smaller than the 'physical' value of the file in the file system, so
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we need to account for that.
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</description>
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</change>
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<change>
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<summary>
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qemu: Fix regression when hyperv/vendor_id feature is used
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</summary>
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<description>
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Guests using the feature would not be started at all; it is now
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possible to start them as expected.
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</description>
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</change>
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<change>
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<summary>
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qemu: Do not crash on USB address with no port and invalid bus
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</summary>
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</change>
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<change>
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<summary>
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crypto: Always pad data before encrypting it
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</summary>
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<description>
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If this step is not performed, when the data length matches the
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chunk size the decryption routines will misinterpret the last byte
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of data as the padding length and fail to decode it correctly.
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</description>
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</change>
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</section>
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</release>
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<release version="v3.2.0" date="2017-04-02">
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<section title="New features">
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<change>
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<summary>
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The virt-host-validate tool now supports bhyve hypervisor
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</summary>
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</change>
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<change>
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<summary>
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Introduce NVDIMM memory model
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</summary>
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<description>
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NVDIMM is new type of memory introduced into QEMU 2.6. The idea is
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that we have a non-volatile memory module that keeps the data
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persistent across domain reboots and offers much faster data
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accesses. However, due to a bug in QEMU, this feature is not enabled
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for QEMUs older than 2.9.0.
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</description>
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</change>
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<change>
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<summary>
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qemu: Introduce support for generic PCIe Root Ports
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</summary>
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<description>
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For new controllers, a generic device (pcie-root-port) will be used
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by default instead of the Intel-specific device (ioh3420), provided
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the QEMU binary supports it.
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</description>
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</change>
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<change>
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<summary>
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qemu: Add support for checking guest CPU ABI compatibility
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</summary>
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<description>
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When migrating a domain to a different host, restoring a domain from
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a file or reverting a snapshot libvirt will make sure the guest CPU
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QEMU presents to the guest OS exactly matches the one provided on
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the source host (or before the domain's state was saved). This
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enhanced check may also be requested when starting a new domain to
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ensure the virtual CPU exactly matches the one specified in the XML.
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</description>
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</change>
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<change>
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<summary>
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qemu: Add support to migrate using TLS
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</summary>
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<description>
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Add the ability to migrate QEMU guests using TLS via a new flag
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VIR_MIGRATE_TLS or virsh migrate '--tls' option. Requires using at
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least QEMU 2.9.0 in order to work properly.
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</description>
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</change>
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<change>
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<summary>
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qemu: add mediated devices framework support
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</summary>
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<description>
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Recent kernel version introduced new mediated device framework, so
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provide an initial support of this framework for libvirt, mainly by
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introducing a new host device type in the XML.
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</description>
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</change>
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<change>
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<summary>
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qemu: Add support for setting TSC frequency
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</summary>
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<description>
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Setting TSC frequency is required to enable migration for domains
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with 'invtsc' CPU feature turned on.
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</description>
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</change>
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<change>
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<summary>
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Add support for block device threshold event
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</summary>
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<description>
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When using thin provisioning, management tools need to resize the
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disk in certain cases. To avoid having them to poll disk usage
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this version introduces an event which will be fired when a given
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offset of the storage is written by the hypervisor. Together with the
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API it allows registering thresholds for given storage backing
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volumes and this event will then notify management if the threshold
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is exceeded. Currently only the qemu driver supports this.
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</description>
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</change>
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<change>
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<summary>
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bhyve: Add support for UEFI boot ROM, VNC, and USB tablet
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</summary>
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<description>
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The bhyve driver now supports booting using the UEFI boot ROM,
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so non-FreeBSD guests that support UEFI could be booted without
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using an external boot loader like grub-bhyve. Video is also
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supported now, allowing to connect to guests via VNC and use
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an USB tablet as an input device. Please refer to
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the driver page for domain XML examples.
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</description>
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</change>
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</section>
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<section title="Improvements">
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<change>
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<summary>
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qemu: Detect host CPU model by asking QEMU on x86_64
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</summary>
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<description>
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Previously, libvirt detected the host CPU model using CPUID
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instruction, which caused libvirt to detect a lot of CPU features
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that are not supported by QEMU/KVM. Asking QEMU makes sure we
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don't start it with unsupported features.
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</description>
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</change>
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<change>
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<summary>
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perf: Add more perf statistics
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</summary>
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<description>
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Add support to get the count of cpu clock time, task clock time,
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page faults, context switches, cpu migrations, minor page faults,
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major page faults, alignment faults, emulation faults by
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applications running on the platform.
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</description>
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</change>
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<change>
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<summary>
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Write hyperv crash information into vm log
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</summary>
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<description>
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qemu's implementation of the hyperv panic notifier now reports
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information about the crash from the guest os. Starting with this
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version, libvirt logs the information to the vm log file for possible
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debugging.
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</description>
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</change>
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</section>
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<section title="Bug fixes">
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<change>
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<summary>
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QEMU: Use adaptive timeout for connecting to monitor
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</summary>
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<description>
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When starting qemu, libvirt waits for qemu to create the monitor
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socket which libvirt connects to. Historically, there was sharp 30
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second timeout after which the qemu process was killed. This
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approach is suboptimal as in some scenarios with huge amounts of
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guest RAM it can take a minute or more for kernel to allocate and
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zero out pages for qemu. The timeout is now flexible and computed by
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libvirt at domain startup.
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</description>
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</change>
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<change>
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<summary>
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Overwrite (clear) 2 KB instead of just 512 bytes when initializing logical device
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</summary>
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</change>
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<change>
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<summary>
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Describe the logical backend requirements better for pool-create-as
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</summary>
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</change>
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</section>
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</release>
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<release version="v3.1.0" date="2017-03-03">
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<section title="New features">
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<change>
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<summary>
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storage: Add Virtuozzo storage backend storage pool
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</summary>
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<description>
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Add new storage backend to support pool and volume management
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within the Virtuozzo Storage environment. Virtuozzo Storage is
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a highly available distributed software defined storage with
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built-in replication and disaster recovery.
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</description>
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</change>
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<change>
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<summary>
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qemu: Add support for memory backing with file source
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</summary>
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<description>
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Add support in numa topology for file source inside memory backing
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(hugepages are not needed) Three new elements
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<source/>,<access/> and <allocation/> were added
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to <memoryBacking/> element. Also new configuration parameter
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<code>memory_backing_dir</code> was added to qemu.conf.
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</description>
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</change>
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<change>
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<summary>
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network: make openvswitch call timeout configurable
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</summary>
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<description>
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Adding the ability to specify the timeout value in seconds for
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openvswitch calls in the libvirtd configuration file.
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</description>
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</change>
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<change>
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<summary>
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bhyve: add e1000 NIC support
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</summary>
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<description>
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Add support for e1000 NIC. Previously, the only available option
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was <code>virtio-net</code>.
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</description>
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</change>
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<change>
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<summary>
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libxl: add tunneled migration support
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</summary>
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<description>
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Add tunneled migration to libxl driver, which is always capable of
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strong encryption and doesn't require any extra network connection
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other than what's required for remote access of libvirtd.
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</description>
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</change>
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<change>
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<summary>
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qemu: add rendernode argument
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</summary>
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<description>
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Add a new attribute 'rendernode' to <gl> spice element.
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</description>
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</change>
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<change>
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<summary>
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nodedev: add drm capability
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</summary>
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<description>
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Add a new 'drm' capability for Direct Rendering Manager (DRM)
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devices, providing device type information.
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</description>
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</change>
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<change>
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<summary>
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Add API for individual/specific vCPU hotplug
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</summary>
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<description>
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The new API allows selecting specific vCPUs to be added/removed from
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the VM. The existing APIs allowed only adding/removing from the end
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which did not play well with NUMA.
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</description>
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</change>
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</section>
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<section title="Improvements">
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<change>
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<summary>
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virsh: pool-list: allow both --uuid and --name in one command
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</summary>
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<description>
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Adjust the virsh-pool command to support the --uuid and/or --name
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options in order to print just the --name and/or --uuid of pools.
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</description>
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</change>
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<change>
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<summary>
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Introduce MTU to domain <interface/> and <network>
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</summary>
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<description>
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Allow setting MTU size for some types of domain interface
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and network.
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</description>
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</change>
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<change>
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<summary>
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libxl: improve support for <timer> configurations
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</summary>
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<description>
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Add support for multiple timers. Extend the tsc timer to
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support the emulate mode. Improve conversion of timer XML
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to/from xl.cfg.
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</description>
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</change>
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<change>
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<summary>
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storage: modularize the storage driver
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</summary>
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<description>
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Split up the storage driver backends into loadable modules so that
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binary distributions don't have to compromise on shipping the storage
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driver with all backends which may pull in too many dependencies.
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</description>
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</change>
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</section>
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<section title="Bug fixes">
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<change>
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<summary>
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nodedev: Fabric name must not be required for fc_host capability
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</summary>
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<description>
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fabric_name is one of many fc_host attributes in Linux that is
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optional and left to the low-level driver to decide if it is
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implemented. For example the zfcp device driver does not provide a
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fabric name for an fcp host. The requirement for the existence of
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a fabric name has been removed by making it optional.
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</description>
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</change>
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<change>
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<summary>
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bhyve: change address allocation schema for SATA disks
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</summary>
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<description>
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Previously, the bhyve driver assigned PCI addresses to SATA disks
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directly rather than assigning that to a controller and
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using SATA addresses for disks. It was implemented this way
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because bhyve has no notion of an explicit SATA controller.
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However, as this doesn't match libvirt's understanding of
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disk addresses, the bhyve driver was changed to follow
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the common schema and have PCI addresses for SATA controllers
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and SATA addresses for disks. If you're having issues
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because of this, it's recommended to edit the domain's XML
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and remove <address type='pci'> from the <disk>
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elements with <target bus='sata'/> and let libvirt
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regenerate it properly.
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</description>
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</change>
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<change>
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<summary>
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libxl: maximum memory fixes
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</summary>
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<description>
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Fix reporting of domain maximum memory. Fix setting dom0
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maximum memory.
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</description>
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</change>
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<change>
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<summary>
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libxl: fix disk detach when <driver> not specified
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</summary>
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</change>
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<change>
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<summary>
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libxl: fix dom0 autoballooning with Xen 4.8
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</summary>
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</change>
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<change>
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<summary>
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qemu: Allow empty script path to <interface/>
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</summary>
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<description>
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Historically, this was always allowed. Unfortunately, due to some
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rework done for 1.3.2 release a bug was dragged in which suddenly
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stop allowing domain with such configuration to start.
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</description>
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</change>
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</section>
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</release>
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<release version="v3.0.0" date="2017-01-17">
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<section title="New features">
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<change>
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<summary>
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Domain events for metadata content changes
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</summary>
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<description>
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The domain events framework has a new event ID that can
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be used to get notifications when domain metadata content
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changes.
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</description>
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</change>
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<change>
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<summary>
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Event notifications for the secret object
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</summary>
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<description>
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The secret object now supports event notifications, covering
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lifcycle changes and secret value changes.
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</description>
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</change>
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<change>
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<summary>
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New localPtr attribute for "ip" element in network XML
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</summary>
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</change>
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<change>
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<summary>
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qemu: Support QEMU group I/O throttling
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</summary>
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<description>
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Add the capability to allow group I/O throttling via a new
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domain <disk> <iotune> subelement "group_name"
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to allow sharing I/O throttling quota between multiple drives.
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</description>
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</change>
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<change>
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<summary>
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nss: Introduce libvirt_guest
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</summary>
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<description>
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New <code>libvirt_guest</code> nss module that translates libvirt
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guest names into IP addresses.
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</description>
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</change>
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<change>
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<summary>
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daemon: Add support for runtime logging settings adjustment
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</summary>
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<description>
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Logging-related settings like log outputs and filters can now be
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adjusted during runtime using the admin interface without the
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necessity of the daemon's restart.
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</description>
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</change>
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<change>
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<summary>
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storage: Add virStorageVolInfoFlags API
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</summary>
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<description>
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Add the API to support using the VIR_STORAGE_VOL_GET_PHYSICAL
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flag in order to return the host physical size in bytes
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of the image container in the allocation field of the
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_virStorageVolInfo structure. The --physical flag has been
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added to the virsh vol-info command to access the data.
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</description>
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</change>
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<change>
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<summary>
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libxl: Implement virDomainGetMaxVcpus API
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</summary>
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</change>
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<change>
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<summary>
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storage: Add overwrite flag checking for logical pool
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</summary>
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<description>
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Add support for the OVERWRITE flags for the logical storage
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backend including checking for existing data on the target
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volumes when building a new logical pool on target volume(s).
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</description>
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</change>
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<change>
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<summary>
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qemu: Add support for guest CPU configuration on s390(x)
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</summary>
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</change>
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</section>
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<section title="Improvements">
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<change>
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<summary>
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perf: Add more perf statistics
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</summary>
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<description>
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Add support to get the count of branch instructions
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executed, branch misses, bus cycles, stalled frontend
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cpu cycles, stalled backend cpu cycles, and ref cpu
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cycles by applications running on the platform.
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</description>
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</change>
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<change>
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<summary>
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conf: Display <physical> for volume xml
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</summary>
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<description>
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Add a display of the <physical> size of a disk
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volume in the output of the volume XML.
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</description>
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</change>
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<change>
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<summary>
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qemu: Use virtio-pci by default for aarch64 mach-virt guests
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</summary>
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<description>
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virtio-pci provides several advantages over virtio-mmio, such
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as the ability to hotplug devices and improved performance.
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While opting in to virtio-pci has been possible for a while,
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newly-defined guests will now use it automatically.
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</description>
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</change>
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<change>
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<summary>
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vbox: remove support for VirtualBox 3.x and older
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</summary>
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<description>
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Those old VirtualBox versions have been unsupported by
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upstream for a long time and the API of 4.0 and newer has
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diverged enough to require code abstractions to handle differences.
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Removing support for those old versions drops lots of code from
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the driver and simplifies the logic to ease implementation of new
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features going forward.
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</description>
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</change>
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<change>
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<summary>
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virsh: pool-info: introduce option --bytes
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</summary>
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<description>
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Add option --bytes to virsh pool-info in order ti allow display
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of units in bytes rather than default of human readable output.
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</description>
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</change>
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<change>
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<summary>
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scsi: Add parent wwnn/wwpn or fabric capability for createVport
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</summary>
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<description>
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Improve the algorithm searching for the parent scsi_host device
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for vHBA/NPIV scsi_host creation. Rather than supplying the
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"parent" by name, it's now possible to define the parent by
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it's wwnn/wwpn or fabric_wwn in the node device create XML or
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the storage pool XML.
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</description>
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</change>
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<change>
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<summary>
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qemu: aggregate pcie-root-ports onto multiple functions of a slot
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</summary>
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<description>
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When pcie-root-ports are added to pcie-root in order to
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provide a place to connect PCI Express endpoint devices,
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libvirt now aggregates multiple root ports together onto the
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same slot (up to 8 per slot) in order to conserve slots.
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Using this method, it's possible to connect more than 200
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endpoint devices to a guest that uses PCIe without requiring
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setup of any PCIe switches.
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</description>
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</change>
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</section>
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<section title="Bug fixes">
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<change>
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<summary>
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lxc: fix accidental killing of containers during libvirtd restart
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</summary>
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<description>
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The libvirt_lxc process was previously not moved into the
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container scope. As a result, if systemd reloads its config
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after a container is started, when libvirtd is later restarted
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it will accidentally kill the containers.
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</description>
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</change>
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<change>
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<summary>
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qemu: Correct GetBlockInfo values
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</summary>
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<description>
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For an active domain, correct the physical value provided for
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a raw sparse file backed storage and the allocation value provided
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for a qcow2 file backed storage that hasn't yet been opened on
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the domain.
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</description>
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</change>
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<change>
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<summary>
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qemu: Make virtio console usable on ppc64 guests
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</summary>
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<description>
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The chardev detection code has been improved and can now handle this
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configuration properly.
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</description>
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</change>
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<change>
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<summary>
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qemu: Enable mount namespace
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</summary>
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<description>
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To avoid funny races with udev relabelling devices under our hands and
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to enhance security, libvirt now spawns each qemu process with its own
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<code>/dev</code>.
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</description>
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</change>
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<change>
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<summary>
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storage: Fix implementation of no-overwrite for file system backend
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</summary>
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<description>
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Fix file system storage backend implementation of the OVERWRITE
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flags to be consistent between code and documentation. Add checks
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to ensure that when building a new file system on a target volume
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that there is not something already on the disk in a format that
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libvirt can recognize.
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</description>
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</change>
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<change>
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<summary>
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qemu: Create hugepage path on per domain basis
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</summary>
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<description>
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Historically, all hugepage enabled domains shared the same path under
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hugetlbfs. This left libvirt unable to correctly set security labels
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on it. With this release, however, each domain is put into a
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separate path which is also correctly labeled.
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</description>
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</change>
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<change>
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<summary>
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conf: Reject domains with duplicate drive addresses
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</summary>
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<description>
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Reject duplicate drive addresses for disks and hostdevs at
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domain definition.
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</description>
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</change>
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<change>
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<summary>
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libxl: reverse defaults on HVM net device attach
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</summary>
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<description>
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Fixes network interface attach for HVM domains when no model is
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specified. Emulated hotplug isn't yet supported and hence we should
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default to the general working scenario.
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</description>
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</change>
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<change>
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<summary>
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libxl: always enable pae for x86_64 HVM
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</summary>
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<description>
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By default pae is disabled in libxl. Without an explicit <pae/>
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setting in the domain <features> configuration, an x86_64 HVM
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domain would be get an i686 environment. pae should always be enabled
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for x86_64 HVM domains.
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</description>
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</change>
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<change>
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<summary>
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qemu: Fix XML dump of autogenerated websocket
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</summary>
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<description>
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As a result autogenerated websocket port is regenerated on domain restore,
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migration and such as it should be.
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</description>
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</change>
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</section>
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</release>
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<release version="v2.5.0" date="2016-12-04">
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<section title="New features">
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<change>
|
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<summary>
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shmem: Add support for additional models
|
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</summary>
|
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<description>
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The shmem device can now utilize QEMU's ivshmem-plain and
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ivshmem-doorbell, more modern versions of ivshmem.
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</description>
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</change>
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<change>
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<summary>
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vbox: Add VirtualBox 5.1 support
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</summary>
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</change>
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<change>
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<summary>
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libssh: New transport
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</summary>
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<description>
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The new libssh transport allows one to connect to a running
|
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libvirtd via SSH, using the libssh library; for example:
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<code>qemu+libssh://server/system</code>.
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</description>
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</change>
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<change>
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<summary>
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vhost-scsi: Add support scsi_host hostdev passthrough
|
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</summary>
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<description>
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Add the capability to pass through a scsi_host HBA and the
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associated LUNs to the guest.
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</description>
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</change>
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<change>
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<summary>
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Allow debugging of gluster volumes in qemu
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</summary>
|
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<description>
|
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Users can now enable debug logging for native gluster
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volumes in qemu using the "gluster_debug_level" option in qemu.conf
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</description>
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</change>
|
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<change>
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<summary>
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Pre-allocate memory slots for memory hotplug
|
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</summary>
|
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<description>
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Slot numbers for memory devices are now automatically allocated and
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thus persistent. In addition slot numbers can be specified without
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providing a base address, which simplifies user configuration
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</description>
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</change>
|
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<change>
|
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<summary>
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qemu: Express devices will be placed on PCIe bus by default
|
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</summary>
|
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<description>
|
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For machine types that use a PCI Express root bus
|
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(e.g. x86_64/Q35 and aarch64/virt), any unaddressed PCI
|
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device that is an Express device (all virtio-1.0 devices,
|
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e1000e, nec-xhci, vfio assigned devices) will be placed on
|
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an Express controller (i.e. a pcie-root-port) instead of a
|
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legacy PCI controller (i.e. pci-bridge) with the root ports
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added as needed.
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</description>
|
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</change>
|
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</section>
|
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<section title="Improvements">
|
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<change>
|
|
<summary>
|
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docs: Better documentation for migration APIs and flags
|
|
</summary>
|
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</change>
|
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<change>
|
|
<summary>
|
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vbox: Address thread safety issues
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</summary>
|
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</change>
|
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<change>
|
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<summary>
|
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virsh: Add support for passing an alternative persistent XML to migrate command
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</summary>
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</change>
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<change>
|
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<summary>
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vhostuser: Allow hotplug of multiqueue devices
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</summary>
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</change>
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<change>
|
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<summary>
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NEWS: Switch to an improved format
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</summary>
|
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<description>
|
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List user-visible changes instead of single commits for a better
|
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high-level overview of differences between libvirt releases.
|
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</description>
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</change>
|
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<change>
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<summary>
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website: Modernize layout and branding
|
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</summary>
|
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<description>
|
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The libvirt website looked very cluttered and outdated; it has now
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been completely overhauled, resulting in a design that's better
|
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organized and more pleasant to look at.
|
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</description>
|
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</change>
|
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</section>
|
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<section title="Bug fixes">
|
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<change>
|
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<summary>
|
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vz: Fix migration in P2P mode
|
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</summary>
|
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</change>
|
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<change>
|
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<summary>
|
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Forbid newline character in names of some libvirt objects
|
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</summary>
|
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</change>
|
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<change>
|
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<summary>
|
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Fix compilation on macOS
|
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</summary>
|
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</change>
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</section>
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</release>
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</libvirt>
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