Unmount c/storage containers before removing them #7383
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
When `podman rmi --force` is run, it will remove any containers that depend on the image. This includes Podman containers, but also any other c/storage users who may be using it. With Podman containers, we use the standard Podman removal function for containers, which handles all edge cases nicely, shutting down running containers, ensuring they're unmounted, etc. Unfortunately, no such convient function exists (or can exist) for all c/storage containers. Identifying the PID of a Buildah, CRI-O, or Podman container is extremely different, and those are just the implementations under the containers org. We can't reasonably be able to know if a c/storage container is *in use* and safe for removal if it's not a Podman container. At the very least, though, we can attempt to unmount a storage container before removing it. If it is in use, this will fail (probably with a not-particularly-helpful error message), but if it is not in use but not fully cleaned up, this should make our removing it much more robust than it normally is. Signed-off-by: Matthew Heon <[email protected]>
openshift-ci-robot
added
the
approved
|
@nalind @rhatdan @vrothberg @baude PTAL |
|
@giuseppe PTAL |
|
[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: giuseppe, mheon The full list of commands accepted by this bot can be found here. The pull request process is described here
Needs approval from an approver in each of these files:
Approvers can indicate their approval by writing |
github-actions
bot
added
the
locked - please file new issue/PR
Sign up for free
to subscribe to this conversation on GitHub.
Already have an account?
Sign in.
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
When
podman rmi --forceis run, it will remove any containers that depend on the image. This includes Podman containers, but also any other c/storage users who may be using it. With Podman containers, we use the standard Podman removal function for containers, which handles all edge cases nicely, shutting down running containers, ensuring they're unmounted, etc.Unfortunately, no such convient function exists (or can exist) for all c/storage containers. Identifying the PID of a Buildah, CRI-O, or Podman container is extremely different, and those are just the implementations under the containers org. We can't reasonably be able to know if a c/storage container is in use and safe for removal if it's not a Podman container.
At the very least, though, we can attempt to unmount a storage container before removing it. If it is in use, this will fail (probably with a not-particularly-helpful error message), but if it is not in use but not fully cleaned up, this should make our removing it much more robust than it normally is.