Use UnmountMountPoint util to clean up subpaths #71804
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/assign @jsafrane |
msau42
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Dec 6, 2018
pkg/util/mount/mount_linux.go
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| } else if IsCorruptedMnt(err) { | ||
| return true, err | ||
| } else { | ||
| // TODO: MSAU: should unknown err return pathExists=true for safety? |
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The original function returned false. I think it should actually return true otherwise we may return cleanup success for unknown errors.
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changed it back to original for now. I see util/file/FileExists also returns false for all errors.
msau42
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Dec 26, 2018
pkg/util/mount/mount_linux.go
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| // PathExists returns true if the specified path exists. | ||
| // TODO: MSAU this is not a good name | ||
| func PathExists(path string, mounter Interface) (bool, error) { | ||
| _, err := mounter.ExistsPath(path) |
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This may not work for containerized kubelet because it would cause the path to be checked based on the host, not inside the kubelet container.
I will change it back to os.Stat(). I will need to figure out a different way to unit test this.
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Still todo:
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This was referenced Jan 4, 2019
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: jingxu97, msau42 The full list of commands accepted by this bot can be found here. The pull request process is described here
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This was referenced Jan 4, 2019
tedyu
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Jan 7, 2019
| klog.V(4).Infof("%q is unmounted, deleting the directory", mountPath) | ||
| return os.Remove(mountPath) | ||
| } | ||
| return fmt.Errorf("Failed to unmount path %v", mountPath) |
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The message here seems inaccurate : the path is likely mount point
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…-upstream-release-1.13 Automated cherry pick of #71804: Move unmount volume util from pkg/volume/util to
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…-upstream-release-1.12 Automated cherry pick of #71804: Move unmount volume util from pkg/volume/util to
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…-upstream-release-1.11 Automated cherry pick of #71804: Move unmount volume util from pkg/volume/util to
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Oct 10, 2019
| return fmt.Errorf("Failed to unmount path %v", mountPath) | ||
| } | ||
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| // TODO: clean this up to use pkg/util/file/FileExists |
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There are more than one version of FileExists:
pkg/kubelet/kubeletconfig/util/files/files.go
vendor/golang.org/x/tools/go/buildutil/util.go
I wonder which one we should use.
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What type of PR is this?
/kind bug
What this PR does / why we need it:
UnmountMountPoint is a wrapper util that handles corrupt and stale mounts. Cleaning subpaths mounts should use the util instead of directly calling Unmount.
Which issue(s) this PR fixes:
Fixes #71584
Special notes for your reviewer:
To make this small for backporting, I've tried to do the minimum changes required and will look into refactoring/cleanup afterwards.
Does this PR introduce a user-facing change?: