Live Update
Live update minimizes network interface downtime by performing online upgrade of the virtio-net controller without necessitating a full restart.
To perform a live update, the user must install a newer version of the controller either using the rpm or deb package (depending on the OS distro used). Run:
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For Ubuntu/Debian |
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For CentOS/RedHat |
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Before staring live update, the following command can be used to check the version of the original and destination controllers:
[dpu]# virtnet version
{
"Original Controller": "v24.10.13"
},
{
"Destination Controller": "v24.10.16"
}
If no errors occur, issue the following command to start the live update process:
[dpu]# virtnet update -s
If an error indicates that the update command is unsupported, this means the controller version you are attempting to install is outdated. Reinstalling the correct version resolves the issue.
During the update process, the following command may be used to check the update status:
[dpu]# virtnet update -t
Example output:
{
"status": "inactive", # updating status, whether live update is finished or ongoing
"last live update status": "success", # last live update status
"time_used (s)": 1.655439 # time cost for last live update
}
During the update, it is recommended to not issue any virtnet CLI command.
When the update process completes successfully, the command virtnet update status reflects the status accordingly
If a device is actively migrating, the existing virtnet commands appear as "migrating" for that specific device so that the user can retry later.
When live update is in progress, hotplug/unplug and VF creation/deletion are not supported.