Commit f0e565b4 authored by Asmaa Hassan's avatar Asmaa Hassan Committed by Nick Gaskill

Docs tips to troubleshoot container registry clean up policy

parent 35dda511
......@@ -729,20 +729,78 @@ As a workaround, you should include the architecture in the tag name of individu
### The cleanup policy doesn't delete any tags
In GitLab 13.6 and earlier, when you run the cleanup policy,
you may expect it to delete tags and it does not.
There can be different reasons behind this:
This issue occurs when the cleanup policy was saved without
editing the value in the **Remove tags matching** field.
- In GitLab 13.6 and earlier, when you run the cleanup policy you may expect it to delete tags and
it does not. This occurs when the cleanup policy is saved without editing the value in the
**Remove tags matching** field. This field has a grayed out `.*` value as a placeholder. Unless
`.*` (or another regex pattern) is entered explicitly into the field, a `nil` value is submitted.
This value prevents the saved cleanup policy from matching any tags. As a workaround, edit the
cleanup policy. In the **Remove tags matching** field, enter `.*` and save. This value indicates
that all tags should be removed.
This field had a grayed out `.*` value as a placeholder.
Unless `.*` (or other regex pattern) was entered explicitly into the
field, a `nil` value was submitted. This value prevents the
saved cleanup policy from matching any tags.
- If you are on GitLab self-managed instances and you have 1000+ tags in a container repository, you
might run into a [Container Registry token expiration issue](https://gitlab.com/gitlab-org/gitlab/-/issues/288814),
with `error authorizing context: invalid token` in the logs.
As a workaround, edit the cleanup policy. In the **Remove tags matching**
field, enter `.*` and save. This value indicates that all tags should
be removed.
To fix this, there are two workarounds:
- If you are on GitLab 13.9 or later, you can [set limits for the cleanup policy](#set-cleanup-limits-to-conserve-resources).
This limits the cleanup execution in time, and avoids the expired token error.
- Extend the expiration delay of the Container Registry authentication tokens. This defaults to 5
minutes. You can set a custom value by running
`ApplicationSetting.last.update(container_registry_token_expire_delay: <integer>)` in the Rails
console, where `<integer>` is the desired number of minutes. For reference, 15 minutes is the
value currently in use for GitLab.com. Be aware that by extending this value you increase the
time required to revoke permissions.
If the previous fixes didn't work or you are on earlier versions of GitLab, you can generate a list
of the tags that you want to delete, and then use that list to delete the tags. To do this, follow
these steps:
1. Run the following shell script. The command just before the `for` loop ensures that
`list_o_tags.out` is always reinitialized when starting the loop. After running this command, all
the tags' names will be in the `list_o_tags.out` file:
```shell
# Get a list of all tags in a certain container repository while considering [pagination](../../../api/README.md#pagination)
echo -n "" > list_o_tags.out; for i in {1..N}; do curl --header 'PRIVATE-TOKEN: <PAT>' "https://gitlab.example.com/api/v4/projects/<Project_id>/registry/repositories/<container_repo_id>/tags?per_page=100&page=${i}" | jq '.[].name' | sed 's:^.\(.*\).$:\1:' >> list_o_tags.out; done
```
1. Remove from the `list_o_tags.out` file any tags that you want to keep. Here are some example
`sed` commands for this. Note that these commands are simply examples. You may change them to
best suit your needs:
```shell
# Remove the `latest` tag from the file
sed -i '/latest/d' list_o_tags.out
# Remove the first N tags from the file
sed -i '1,Nd' list_o_tags.out
# Remove the tags starting with `Av` from the file
sed -i '/^Av/d' list_o_tags.out
# Remove the tags ending with `_v3` from the file
sed -i '/_v3$/d' list_o_tags.out
```
If you are running macOS, you must add `.bak` to the commands. For example:
```shell
sed -i .bak '/latest/d' list_o_tags.out
```
1. Double-check the `list_o_tags.out` file to make sure it contains only the tags that you want to
delete.
1. Run this shell script to delete the tags in the `list_o_tags.out` file:
```shell
# loop over list_o_tags.out to delete a single tag at a time
while read -r LINE || [[ -n $LINE ]]; do echo ${LINE}; curl --request DELETE --header 'PRIVATE-TOKEN: <PAT>' "https://gitlab.example.com/api/v4/projects/<Project_id>/registry/repositories/<container_repo_id>/tags/${LINE}"; sleep 0.1; echo; done < list_o_tags.out > delete.logs
```
### Troubleshoot as a GitLab server admin
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