Don't allow resizing VM to 0 vCPUs#7086
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rbradford merged 1 commit intocloud-hypervisor:mainfrom May 21, 2025
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No sane guest OS will allow hotplugging all cpus. However, the REST API currently allows specifying `ch-remote resize --cpus 0`. On Linux, we can then observe the following error in the kernel log: processor cpu0: Offline failed. Subsequent resize commands via ch-remote will then fail with VcpuPendingRemovedVcpu because the removal of cpu0 was never successful. Fix this by disallowing resizing to zero vCPUs. Signed-off-by: Thomas Prescher <thomas.prescher@cyberus-technology.de> On-behalf-of: SAP thomas.prescher@sap.com
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No sane guest OS will allow hotplugging all cpus.
However, the REST API currently allows specifying
ch-remote resize --cpus 0, contrary to what is specified.On Linux, we can then observe the following error in the kernel log:
processor cpu0: Offline failed.Subsequent resize commands via ch-remote will then fail with
VcpuPendingRemovedVcpubecause the removal of cpu0 was never successful.Fix this by disallowing resizing to zero vCPUs.