Fix race conditions in rootless cni setup #10939
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There was an race condition when calling `GetRootlessCNINetNs()`. It created the rootless cni directory before it got locked. Therefore another process could have called cleanup and removed this directory before it was used resulting in errors. The lockfile got moved into the XDG_RUNTIME_DIR directory to prevent a panic when the parent dir was removed by cleanup. Fixes containers#10930 Fixes containers#10922 To make this even more robust `GetRootlessCNINetNs()` will now return locked. This guarantees that we can run `Do()` after `GetRootlessCNINetNs()` before another process could have called `Cleanup()` in between. [NO TESTS NEEDED] CI is flaking, hopefully this will fix it. Signed-off-by: Paul Holzinger <[email protected]>
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locked - please file new issue/PR
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There was an race condition when calling
GetRootlessCNINetNs(). Itcreated the rootless cni directory before it got locked. Therefore
another process could have called cleanup and removed this directory
before it was used resulting in errors. The lockfile got moved into the
XDG_RUNTIME_DIR directory to prevent a panic when the parent dir was
removed by the cleanup.
Fixes #10930
Fixes #10922
To make this even more robust
GetRootlessCNINetNs()will now returnlocked. This guarantees that we can run
Do()afterGetRootlessCNINetNs()before another process could have called
Cleanup()in between.