mirror of https://github.com/apache/cloudstack.git
2a5f37c1b1
This commit adds a additional VirtIO channel with the name 'org.qemu.guest_agent.0' to all Instances. With the Qemu Guest Agent the Hypervisor gains more control over the Instance if these tools are present inside the Instance, for example: * Power control * Flushing filesystems * Fetching Network information In the future this should allow safer snapshots on KVM since we can instruct the Instance to flush the filesystems prior to snapshotting the disk. More information: http://wiki.qemu.org/Features/QAPI/GuestAgent Keep in mind that on Ubuntu AppArmor still needs to be disabled since the default AppArmor profile doesn't allow libvirt to write into /var/lib/libvirt/qemu This commit does not add any communication methods through API-calls, it merely adds the channel to the Instances and installs the Guest Agent in the SSVMs. With the addition of the Qemu Guest Agent channel a second channel appears in /dev on a SSVM as a VirtIO port. The order in which the ports are defined in the XML matters for the naming inside the SSVM VM and by not relying on /dev/vportXX but looking for a static name the SSVM still boots properly if the order in the XML definition is changed. A SSVM with both ports attached will have something like this: root@v-215-VM:~# ls -l /dev/virtio-ports total 0 lrwxrwxrwx 1 root root 11 May 13 21:41 org.qemu.guest_agent.0 -> ../vport0p2 lrwxrwxrwx 1 root root 11 May 13 21:41 v-215-VM.vport -> ../vport0p1 root@v-215-VM:~# ls -l /dev/vport* crw------- 1 root root 251, 1 May 13 21:41 /dev/vport0p1 crw------- 1 root root 251, 2 May 13 21:41 /dev/vport0p2 root@v-215-VM:~# In this case the SSVM port points to /dev/vport0p1, but if the order in the XML is different it might point to /dev/vport0p2 By looking for a portname with a pre-defined pattern in /dev/virtio-ports we do not rely on the order in the XML definition. Signed-off-by: Wido den Hollander <wido@widodh.nl> |
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| apidoc | ||
| appliance | ||
| bugs-wiki | ||
| build | ||
| checkstyle | ||
| cli | ||
| devcloud | ||
| devcloud-kvm | ||
| devcloud4 | ||
| docker | ||
| eclipse | ||
| git | ||
| jira | ||
| logo | ||
| marvin | ||
| ngui | ||
| transifex | ||
| travis | ||
| utils/database_comparision_during_upgrade | ||
| vagrant | ||
| whisker | ||
| wix-cloudstack-maven-plugin | ||
| pom.xml | ||