Fix bug in extracting hardlinks in multistage builds #456
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priyawadhwa
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When we execute multistage builds, we store the fs of each intermediate stage at /kaniko/<stage number> if it's used later in the build. This created a bug when extracting hardlinks, because we weren't appending the new directory to the link path. So, if `/tmp/file1` and `/tmp/file2` were hardlinked, kaniko was trying to link `/kaniko/0/tmp/file1` to `/tmp/file2` instead of `/kaniko/0/tmp/file2`. This change will append the correct directory to the link, and fixes GoogleContainerTools#437 GoogleContainerTools#362 GoogleContainerTools#352 GoogleContainerTools#342.
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aduong
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Nov 18, 2018
pkg/util/fs_util.go
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| if err := os.Link(filepath.Clean(filepath.Join("/", hdr.Linkname)), path); err != nil { | ||
| link := filepath.Join(dest, hdr.Linkname) | ||
| if err := os.Link(filepath.Clean(filepath.Join("/", link)), path); err != nil { |
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I'm curious to know why "/". path is essentially filepath.Join(dest, hdr.Name), so it seems reasonable that the first arg to os.Link is filepath.Join(dest, hdr.Linkname), no?
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thanks for pointing that out! i've removed the unnecessary filepath.Join
added 3 commits
November 19, 2018 15:03
Now that hardlink destinations take into account the directory that they are being extracted to, the unit test had to be updated to make sure that two hardlinks were extracted to /tmp/hardlink correctly.
sharifelgamal
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Nov 19, 2018
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When we execute multistage builds, we store the fs of each intermediate
stage at /kaniko/ if it's used later in the build. This
created a bug when extracting hardlinks, because we weren't appending
the new directory to the link path.
So, if
/tmp/file1and/tmp/file2were hardlinked, kaniko was tryingto link
/kaniko/0/tmp/file1to/tmp/file2instead of/kaniko/0/tmp/file2. This change will append the correct directory tothe link, and
fixes #437
fixes #362
fixes #352
fixes #342.