Offline migration transfers inactive definition of a domain (which may
or may not be active). After successful completion, the domain remains
in its current state on source host and is defined but inactive on
destination host. It's a bit more clever than virDomainGetXMLDesc() on
source host followed by virDomainDefineXML() on destination host, as
offline migration will run pre-migration hook to update the domain XML
on destination host. Currently, copying non-shared storage is not
supported during offline migration.
Offline migration can be requested with a new migration flag called
VIR_MIGRATE_OFFLINE (which has to be combined with
VIR_MIGRATE_PERSIST_DEST flag).
As we enable more modes of snapshot creation, it becomes more important
to be able to quickly filter based on snapshot properties. This patch
introduces new filter flags; subsequent patches will introduce virsh
back-compat filtering, as well as actual libvirt filtering.
* include/libvirt/libvirt.h.in (virDomainSnapshotListFlags): Add
five new flags in two new groups.
* src/libvirt.c (virDomainSnapshotNum, virDomainSnapshotListNames)
(virDomainListAllSnapshots, virDomainSnapshotNumChildren)
(virDomainSnapshotListChildrenNames)
(virDomainSnapshotListAllChildren): Document them.
* src/conf/snapshot_conf.h (VIR_DOMAIN_SNAPSHOT_FILTERS_STATUS)
(VIR_DOMAIN_SNAPSHOT_FILTERS_LOCATION): Add new convenience filter
collection macros.
* tools/virsh-snapshot.c (cmdSnapshotList): Add 5 new flags.
* tools/virsh.pod (snapshot-list): Document them.
This reverts commits 5f63a5cb42
and ff86b0c97b. After much list
discussion, consensus was that libvirt aliases should be reserved
to correct typos, otherwise it risks confusion. Rather, we
should implement a way for users to provide their own aliases
as part of their virsh configuration preferences.
External checkpoints could be created with snapshot-create, but
without libvirt supplying a default name for the memory file,
it is essential to add a new argument to snapshot-create-as to
allow the user to choose the memory file name. This adds the
option --memspec [file=]name[,snapshot=type], where type can
be none, internal, or external. For an example,
virsh snapshot-create-as $dom --memspec /path/to/file
is the shortest possible command line for creating an external
checkpoint, named after the current timestamp.
* tools/virsh-snapshot.c (vshParseSnapshotMemspec): New function.
(cmdSnapshotCreateAs): Use it.
* tests/virsh-optparse (test_url): Test it.
* tools/virsh.pod (snapshot-create-as): Document it.
Make it clear that the alternate terms have no difference except
for length of time they were supported.
* tools/virsh.pod (start, shutdown, reboot): More documentation.
https://bugzilla.redhat.com/show_bug.cgi?id=873344 suggested that
the grouping 'boot', 'shutdown', 'reboot'; as well as the grouping
'start', 'stop', 'restart'; might be easier to remember than the
current mix of 'start', 'shutdown', 'reboot'.
Also, touch up the wording of 'reboot' to be more accurate.
* tools/virsh-domain.c (domManagementCmds): Add other command names.
* tools/virsh.pod (start, shutdown, reboot): Document the aliases.
The default behavior while creating external checkpoints is to pause the
guest while the memory state is captured. We want the users to sacrifice
space saving for creating the memory save image while the guest is live
to minimize downtime.
This patch adds a flag that causes the guest not to be paused before
taking the snapshot.
*include/libvirt/libvirt.h.in:
- add new paused reason: VIR_DOMAIN_PAUSED_SNAPSHOT
- add new flag for taking snapshot: VIR_DOMAIN_SNAPSHOT_CREATE_LIVE
*tools/virsh-domain-monitor.c:
- add string representation for VIR_DOMAIN_PAUSED_SNAPSHOT
*tools/virsh-snapshot.c:
- add support for VIR_DOMAIN_SNAPSHOT_CREATE_LIVE
*tools/virsh.pod:
- add docs for --live option added to use
VIR_DOMAIN_SNAPSHOT_CREATE_LIVE flag
We always expose individual bits from flags as separate options rather
than exposing a raw flags options. Since virNodeSuspendForDuration does
not currently support any flags, the only way of using this --flags
options that would not fail is "--flags 0", which is equivalent to
omitting the option. Thus it is highly unlikely anyone would actually be
using it and removing it should be safe.
https://bugzilla.redhat.com/show_bug.cgi?id=869100 mentioned some
confusion about 'virsh snapshot-list' errors. Clean up a
misleading error message, and add some documentation.
* tools/virsh-snapshot.c (cmdSnapshotList): Mention --current
rather than --from when appropriate.
* tools/virsh.pod (snapshot-list): Mention that the named starting
point is NOT part of the list except under --tree.
Upstream kernel introduced new sysfs knob "merge_across_nodes" to
specify if pages from different numa nodes can be merged. When set
to 0, only pages which physically reside in the memory area of
same NUMA node can be merged. When set to 1, pages from all nodes
can be merged.
This patch supports the tuning by adding new param field
"shm_merge_across_nodes".
Using VIR_DOMAIN_XML_MIGRATABLE flag, one can request domain's XML
configuration that is suitable for migration or save/restore. Such XML
may contain extra run-time stuff internal to libvirt and some default
configuration may be removed for better compatibility of the XML with
older libvirt releases.
This flag may serve as an easy way to get the XML that can be passed
(after desired modifications) to APIs that accept custom XMLs, such as
virDomainMigrate{,ToURI}2 or virDomainSaveFlags.
I was using qemu-monitor-command during development, and found it quite
hard to use. Compare the results of this patch on ease of reading:
$ virsh qemu-monitor-command dom '{"execute":"query-version"}'
{"return":{"qemu":{"micro":1,"minor":12,"major":0},"package":"(qemu-kvm-0.12.1.2)"},"id":"libvirt-7683"}
$ virsh qemu-monitor-command --pretty dom '{"execute":"query-version"}'
{
"return": {
"qemu": {
"micro": 1,
"minor": 12,
"major": 0
},
"package": "(qemu-kvm-0.12.1.2)"
},
"id": "libvirt-7674"
}
* tools/virsh-host.c (cmdQemuMonitorCommand): New option.
* tools/virsh.pod (qemu-monitor-command): Document it.
This command uses the new virNetworkUpdate() API to modify an existing
network definition, and optionally have those modifications take
effect immediately without restarting the network.
An example usage:
virsh net-update mynet add-last ip-dhcp-host \
"<host mac='00:11:22:33:44:55' ip='192.168.122.45'/>" \
--live --config
If you like, you can instead put the xml into a file, and call like
this:
virsh net-update mynet add ip-dhcp-host /tmp/myxml.xml
--live --config
virsh will autodetect whether the argument is itself an xml element,
or if it's a file, by looking at the first character - the first
character of an xml element is always "<", and the first character of
a file is almost always *not* "<" (in the rare case that it is, the
user could specify "./<filename...").
A --parent-index option is also available (to give the index within a
list of parent objects, e.g. the index of the parent <ip> element when
updating ip-dhcp-host elements), but is optional and at least for now
will probably be used rarely.
--live, --config, and --current options - if you specify --live, only
the live state of the network will be updated. If you also specify
--config, then the persistent configuration will also be updated;
these two commands can be given separately, or both together. If you
don't specify either (you can optionally specify "--current" for the
same effect), then the "current" config will be updated (i.e. if the
network is active, then only its live config is affected, but if the
network is inactive, only the persistent config is affected).
The new command 'virsh blockcommit $dom $disk' requests the start
of an asynchronous commit operation across the entire chain of
$disk. Further arguments can fine-tune which portion of the
chain is committed. Existing 'virsh blockjob' commands can then
track the status, change the bandwidth, or abort the commit job.
With a bit more on the command line, 'virsh blockcommit $dom $disk
--wait --verbose' can be used for blocking behavior, with visual
feedback on the overall status, and can be canceled with Ctrl-C.
The overall design, including the wait loop logic, borrows heavily
from the existing blockpull command.
* tools/virsh-domain.c (cmdBlockCommit): New function.
* tools/virsh.pod (blockcommit): Document it.
New command node-memory-tune to get/set the node memory parameters,
only two parameters are allowed to set (pages_to_scan, and sleep_millisecs,
see documents in this patch for more details).
Example of node-memory-tune's output:
Shared memory:
pages_to_scan 100
sleep_millisecs 20
pages_shared 0
pages_sharing 0
pages_unshared 0
pages_volatile 0
full_scans 0
This introduces four new options for secret-list, to filter the
returned secrets by whether it's ephemeral or not, and/or by
whether it's private or not.
* tools/virsh-secret.c: (New helper vshSecretSorter,
vshSecretListFree, and vshCollectSecretList; Use the new
API for secret-list; error out if flags are specified,
because there is no way to filter the results when using
old APIs (no APIs to get the properties (ephemeral, private)
of a secret yet).
* tools/virsh.pod: Document the 4 new options.
tools/virsh-nodedev.c:
* vshNodeDeviceSorter to sort node devices by name
* vshNodeDeviceListFree to free the node device objects list.
* vshNodeDeviceListCollect to collect the node device objects, trying
to use new API first, fall back to older APIs if it's not supported.
* Change option --cap to accept multiple capability types.
tools/virsh.pod
* Update document for --cap
tools/virsh-network.c:
* vshNetworkSorter to sort networks by name
* vshNetworkListFree to free the network objects list.
* vshNetworkListCollect to collect the network objects, trying
to use new API first, fall back to older APIs if it's not supported.
* New options --persistent, --transient, --autostart, --no-autostart,
for net-list, and new field 'Persistent' for its output.
tools/virsh.pod:
* Add documents for the new options.
tools/virsh-pool.c:
* vshStoragePoolSorter to sort the pool list by pool name.
* struct vshStoragePoolList to present the pool list, pool info
is collected by list->poolinfo if 'details' is specified by
user.
* vshStoragePoolListFree to free the pool list
* vshStoragePoolListCollect to collect the pool list, new API
virStorageListAllPools is tried first, if it's not supported,
fall back to older APIs.
* New options --persistent, --transient, --autostart, --no-autostart
and --type for pool-list. --persistent or --transient is to filter
the returned pool list by whether the pool is persistent or not.
--autostart or --no-autostart is to filter the returned pool list
by whether the pool is autostarting or not. --type is to filter
the pools by pool types. E.g.
% virsh pool-list --all --persistent --type dir,disk
tools/virsh.pod:
* Add documentations for the new options.
The storage pool's management doesn't relate with a domain, it
probably was an intention, but not achieved yet. And the fact
is only active pools are listed by default.
The bandwidth units for blockpull and blockcopy are in Megabytes per
Second, not Megabits per Second.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
This patch adds two macros: VIR_DOMAIN_SCHEDULER_EMULATOR_PERIOD,
VIR_DOMAIN_SCHEDULER_EMULATOR_QUOTA for controlling cpu bandwidth
for emulator activities not tied to vcpus
Change the permissible minimum value of nodesuspend duration time
to 60 seconds. If option is less than the value, reports error.
Update virsh help and manpage the infomation.
When --direct is used when migrating a domain running on a hypervisor
that does not support direct migration (such as QEMU), the caller would
get the following error message:
this function is not supported by the connection driver:
virDomainMigrateToURI2
which is a complete nonsense since qemu driver implements
virDomainMigrateToURI2. This patch would emit a more sensible error in
this case:
Requested operation is not valid: direct migration is not supported
by the connection driver
v2:
- Refactored to use virBuffer
- Refactored to use virXPath wrappers
- Added support for tls-port and password for SPICE
- Added optional flag to disable SPICE password to the URI
- Added support for RDP
- Fixed code reviews
Add a new 'domdisplay' command that provides a URI for VNC, SPICE and
RDP connections. Presently the 'vncdisplay' command provides you with
the port info that QEMU is listening on but there is no counterpart for
SPICE and RDP. Additionally this provides you with the bind address as
specified in the XML, which the existing 'vncdisplay' lacks. For SPICE
connections it supports secure and unsecure channels and optionally
providing the password for the SPICE channel.
Signed-off-by: Doug Goldstein <cardoe@cardoe.com>
Storage is one of the last domains in libvirt where we don't fully
utilize inactive and live XML. Okay, it might be because we don't
have support for that. So implement such support. However, we need
to fallback when talking to old daemon which doesn't support this
new flag called VIR_STORAGE_XML_INACTIVE.
This patch makes use of the newly added api virConnectListAllDomains()
to list domains in virsh.
Virsh now represents lists of domains using an internal structure
vshDomainList. This structure contains the virDomainPtr list as provided
by virConnectListAllDomains() and the count of domains in the list.
For backwards compatibility, the function vshDomainListCollect was added
that tries to enumerate the domains using the new API and if the API is
not supported falls back to the older approach with the two list
functions. The helper function also simulates filtering by all
currently supported flags added with virConnectListAllDomains().
This patch also cleans up the "list" command handler to use the new
helpers and adds new command line flags to make use of filtering.
Previously, to get the name of all snapshots with children, it was
necessary to get the name of all snapshots and then remove the
name of leaf snapshots. This is racy, and somewhat inefficient
compared to planned API additions. We can emulate --no-metadata on
0.9.5-0.9.12, but for now, there is no emulation of --no-leaves.
* tools/virsh.c (cmdSnapshotList): Add new options --no-leaves and
--no-metadata.
(vshSnapshotList): Emulate where possible.
* tools/virsh.pod (snapshot-list): Document them.
