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Updated notes about HVM devices / boot details
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Daniel P. Berrange
parent
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commit
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@ -1,3 +1,9 @@
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Mon Aug 14 10:55:02 EDT 2006 Daniel Berrange <berrange@redhat.com>
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* docs/libvir.html, docs/format.html: Updated description of
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HVM boot device, and disk device configuration to match up
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new new behaviour from previous changes
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Fri Aug 11 09:37:02 EDT 2006 Daniel Berrange <berrange@redhat.com>
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* src/libvirt.c: Avoid duplicated attempts to shutdown or
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@ -99,7 +99,7 @@ systems:</p><pre><domain type='xen' id='3'>
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<os>
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<span style="color: #0000E5; background-color: #FFFFFF"><type>hvm</type></span>
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<span style="color: #0000E5; background-color: #FFFFFF"><loader>/usr/lib/xen/boot/hvmloader</loader></span>
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<span style="color: #0000E5; background-color: #FFFFFF"><boot dev='hda'/></span>
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<span style="color: #0000E5; background-color: #FFFFFF"><boot dev='da'/></span>
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</os>
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<memory>524288</memory>
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<vcpu>1</vcpu>
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@ -115,22 +115,50 @@ systems:</p><pre><domain type='xen' id='3'>
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</interface>
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<disk type='file'>
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<source file='/root/fv0'/>
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<target <span style="color: #0000E5; background-color: #FFFFFF">dev='ioemu:hda'</span>/>
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<target <span style="color: #0000E5; background-color: #FFFFFF">dev='hda'</span>/>
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</disk>
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<disk type='file' <span style="color: #0000E5; background-color: #FFFFFF">device='cdrom'</span>>
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<source file='/root/fc5-x86_64-boot.iso'/>
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<target <span style="color: #0000E5; background-color: #FFFFFF">dev='hdc'</span>/>
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<readonly/>
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</disk>
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<disk type='file' <span style="color: #0000E5; background-color: #FFFFFF">device='floppy'</span>>
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<source file='/root/fd.img'/>
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<target <span style="color: #0000E5; background-color: #FFFFFF">dev='fda'</span>/>
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</disk>
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<span style="color: #0000E5; background-color: #FFFFFF"><graphics type='vnc' port='5904'/></span>
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</devices>
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</domain></pre><p>There is a few things to notice specifically for HVM domains:</p><ul><li>the <os> block description is very different, first it indicates
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</domain></pre><p>There is a few things to notice specifically for HVM domains:</p><ul><li>the <code><os></code> block description is very different, first it indicates
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that the type is 'hvm' for hardware virtualization, then instead of a
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kernel, boot and command line arguments, it points to an os boot loader
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which will extract the boot informations from the boot device specified
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in a separate boot element</li>
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<li>the <devices> section includes an emulator entry pointing to an
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in a separate boot element. The <code>dev</code> attribute on the <code>boot</code>
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tag can be one of:
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<ul><li><code>fd</code> - boot from first floppy device</li>
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<li><code>hd</code> - boot from first harddisk device</li>
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<li><code>cdrom</code> - boot from first cdrom device</li>
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</ul></li>
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<li>the <code><devices></code> section includes an emulator entry pointing to an
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additional program in charge of emulating the devices</li>
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<li>the disk entry indicates in the dev target section that the emulation
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for the drive is the first IDE disk device hda</li>
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<li>the <devices> section also include at least one entry for the
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for the drive is the first IDE disk device hda. The list of device names
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supported is dependant on the Hypervisor, but for Xen it can be any IDE
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device <code>hda</code>-<code>hdd</code>, or a floppy device <code>fda</code>,
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<code>fdb</code>. The <code><disk></code> element also supports a 'device'
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attribute to indicate what kinda of hardware to emulate. The following values are
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supported:
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<ul><li><code>floppy</code> - a floppy disk controller</li>
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<li><code>disk</code> - a generic hard drive (the default it omitted)</li>
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<li><code>cdrom</code> - a CDROM device</li>
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</ul>
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For Xen 3.0.2 and earlier a CDROM device can only be emulated on the
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<code>hdc</code> channel, while for 3.0.3 and later, it can be emulated on
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any IDE channel.</li>
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<li>the <code><devices></code> section also include at least one entry for the
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graphic device used to render the os. Currently there is just 2 types
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possible 'vnc' or 'sdl'</li>
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possible 'vnc' or 'sdl'. If the type is 'vnc', then an additional <code>port</code>
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attribute will be present indicating the TCP port on which the VNC server is
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accepting client connections.</li>
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</ul><p>It is likely that the HVM description gets additional optional elements
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and attributes as the support for fully virtualized domain expands,
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especially for the variety of devices emulated and the graphic support
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@ -423,7 +423,7 @@ systems:</p>
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<os>
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<span style="color: #0000E5; background-color: #FFFFFF"><type>hvm</type></span>
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<span style="color: #0000E5; background-color: #FFFFFF"><loader>/usr/lib/xen/boot/hvmloader</loader></span>
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<span style="color: #0000E5; background-color: #FFFFFF"><boot dev='hda'/></span>
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<span style="color: #0000E5; background-color: #FFFFFF"><boot dev='hd'/></span>
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</os>
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<memory>524288</memory>
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<vcpu>1</vcpu>
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@ -439,7 +439,16 @@ systems:</p>
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</interface>
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<disk type='file'>
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<source file='/root/fv0'/>
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<target <span style="color: #0000E5; background-color: #FFFFFF">dev='ioemu:hda'</span>/>
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<target <span style="color: #0000E5; background-color: #FFFFFF">dev='hda'</span>/>
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</disk>
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<disk type='file' <span style="color: #0000E5; background-color: #FFFFFF">device='cdrom'</span>>
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<source file='/root/fc5-x86_64-boot.iso'/>
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<target <span style="color: #0000E5; background-color: #FFFFFF">dev='hdc'</span>/>
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<readonly/>
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</disk>
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<disk type='file' <span style="color: #0000E5; background-color: #FFFFFF">device='floppy'</span>>
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<source file='/root/fd.img'/>
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<target <span style="color: #0000E5; background-color: #FFFFFF">dev='fda'</span>/>
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</disk>
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<span style="color: #0000E5; background-color: #FFFFFF"><graphics type='vnc' port='5904'/></span>
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</devices>
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@ -447,18 +456,40 @@ systems:</p>
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<p>There is a few things to notice specifically for HVM domains:</p>
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<ul>
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<li>the <os> block description is very different, first it indicates
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<li>the <code><os></code> block description is very different, first it indicates
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that the type is 'hvm' for hardware virtualization, then instead of a
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kernel, boot and command line arguments, it points to an os boot loader
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which will extract the boot informations from the boot device specified
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in a separate boot element</li>
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<li>the <devices> section includes an emulator entry pointing to an
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in a separate boot element. The <code>dev</code> attribute on the <code>boot</code>
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tag can be one of:
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<ul>
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<li><code>fd</code> - boot from first floppy device</li>
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<li><code>hd</code> - boot from first harddisk device</li>
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<li><code>cdrom</code> - boot from first cdrom device</li>
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</ul>
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</li>
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<li>the <code><devices></code> section includes an emulator entry pointing to an
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additional program in charge of emulating the devices</li>
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<li>the disk entry indicates in the dev target section that the emulation
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for the drive is the first IDE disk device hda</li>
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<li>the <devices> section also include at least one entry for the
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for the drive is the first IDE disk device hda. The list of device names
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supported is dependant on the Hypervisor, but for Xen it can be any IDE
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device <code>hda</code>-<code>hdd</code>, or a floppy device <code>fda</code>,
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<code>fdb</code>. The <code><disk></code> element also supports a 'device'
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attribute to indicate what kinda of hardware to emulate. The following values are
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supported:
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<ul>
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<li><code>floppy</code> - a floppy disk controller</li>
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<li><code>disk</code> - a generic hard drive (the default it omitted)</li>
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<li><code>cdrom</code> - a CDROM device</li>
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</ul>
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For Xen 3.0.2 and earlier a CDROM device can only be emulated on the
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<code>hdc</code> channel, while for 3.0.3 and later, it can be emulated on
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any IDE channel.</li>
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<li>the <code><devices></code> section also include at least one entry for the
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graphic device used to render the os. Currently there is just 2 types
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possible 'vnc' or 'sdl'</li>
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possible 'vnc' or 'sdl'. If the type is 'vnc', then an additional <code>port</code>
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attribute will be present indicating the TCP port on which the VNC server is
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accepting client connections.</li>
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</ul>
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<p>It is likely that the HVM description gets additional optional elements
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