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Merge pull request #24400 from giuseppe/fix-race-reading-cgroup-stats 

libpod: report cgroups deleted during Stat() call
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openshift-merge-bot[bot] 2024-10-29 12:20:36 +00:00 committed by GitHub
parent b52e6cc874 1f44d0f8b2
commit 364761fc30
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1 changed files with 6 additions and 0 deletions
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6
libpod/stats_linux.go
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@ -3,6 +3,7 @@
package libpod
import (
"errors"
"fmt"
"strings"
"syscall"
@ -36,6 +37,11 @@ func (c *Container) getPlatformContainerStats(stats *define.ContainerStats, prev
// Ubuntu does not have swap memory in cgroups because swap is often not enabled.
cgroupStats, err := cgroup.Stat()
if err != nil {
// cgroup.Stat() is not an atomic operation, so it is possible that the cgroup is removed
// while Stat() is running. Try to catch this case and return a more specific error.
if (errors.Is(err, unix.ENOENT) || errors.Is(err, unix.ENODEV)) && !cgroupExist(cgroupPath) {
return fmt.Errorf("cgroup %s does not exist: %w", cgroupPath, define.ErrCtrStopped)
}
return fmt.Errorf("unable to obtain cgroup stats: %w", err)
}
conState := c.state.State