cache: force overlay readonly by removing upperdir #1100
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Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
tiborvass
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Jul 30, 2019
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LGTM |
laurazard
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This is necessary so we can mount snapshots more than once with overlayfs, otherwise mounts enter an unknown state. related: moby/buildkit#1100 Signed-off-by: Laura Brehm <laurabrehm@hey.com> Co-authored-by: Zou Nengren <zouyee1989@gmail.com>
laurazard
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This is necessary so we can mount snapshots more than once with overlayfs, otherwise mounts enter an unknown state. related: moby/buildkit#1100 Signed-off-by: Laura Brehm <laurabrehm@hey.com> Co-authored-by: Zou Nengren <zouyee1989@gmail.com>
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This is necessary so we can mount snapshots more than once with overlayfs, otherwise mounts enter an unknown state. related: moby/buildkit#1100 Signed-off-by: Laura Brehm <laurabrehm@hey.com> Co-authored-by: Zou Nengren <zouyee1989@gmail.com>
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This is necessary so we can mount snapshots more than once with overlayfs, otherwise mounts enter an unknown state. related: moby/buildkit#1100 Signed-off-by: Laura Brehm <laurabrehm@hey.com> Co-authored-by: Zou Nengren <zouyee1989@gmail.com>
laurazard
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This is necessary so we can mount snapshots more than once with overlayfs, otherwise mounts enter an unknown state. related: moby/buildkit#1100 Signed-off-by: Laura Brehm <laurabrehm@hey.com> Co-authored-by: Zou Nengren <zouyee1989@gmail.com>
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Mar 22, 2023
This is necessary so we can mount snapshots more than once with overlayfs, otherwise mounts enter an unknown state. related: moby/buildkit#1100 Signed-off-by: Laura Brehm <laurabrehm@hey.com> Co-authored-by: Zou Nengren <zouyee1989@gmail.com> (cherry picked from commit daa3a76)
laurazard
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Mar 22, 2023
This is necessary so we can mount snapshots more than once with overlayfs, otherwise mounts enter an unknown state. related: moby/buildkit#1100 Signed-off-by: Laura Brehm <laurabrehm@hey.com> Co-authored-by: Zou Nengren <zouyee1989@gmail.com> (cherry picked from commit daa3a76) Signed-off-by: Laura Brehm <laurabrehm@hey.com>
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Sep 21, 2023
This is necessary so we can mount snapshots more than once with overlayfs, otherwise mounts enter an unknown state. related: moby/buildkit#1100 Signed-off-by: Laura Brehm <laurabrehm@hey.com> Co-authored-by: Zou Nengren <zouyee1989@gmail.com>
juliusl
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Jan 26, 2024
This is necessary so we can mount snapshots more than once with overlayfs, otherwise mounts enter an unknown state. related: moby/buildkit#1100 Signed-off-by: Laura Brehm <laurabrehm@hey.com> Co-authored-by: Zou Nengren <zouyee1989@gmail.com>
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fixes #1091
Add a special handling for readonly overlay mounts from active snapshots that removes the upper directory.
@dmcgowan @denzp
@dmcgowan While I think this is fine to do in cases buildkit already knows mount is readonly I think there should be some lower-level protection because the APIs all support getting multiple mounts. I would expect ref counting for overlay mount lifecycle in containerd so it doesn't crash on runtime or if this is not possible I think I need to add a refcounting snapshot wrapper in buildkit.
Signed-off-by: Tonis Tiigi tonistiigi@gmail.com