[Backport release-1.31] Applier manager improvements #5171
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The map is only ever used in the loop to create and remove stacks, so it doesn't need to be stored in the struct. This ensures that there can't be any racy concurrent accesses to it. Signed-off-by: Tom Wieczorek <twieczorek@mirantis.com> (cherry picked from commit ba547ed)
The only reason these channels get closed is if the watcher itself gets closed. This happens only when the method returns, which in turn only happens when the context is done. In this case, the loop has already exited without a select on a potentially closed channel. So the branches that checked for closed channels were effectively unreachable during runtime. Signed-off-by: Tom Wieczorek <twieczorek@mirantis.com> (cherry picked from commit db5e0d2)
Rename cancelWatcher to stop and wait until the newly added stopped channel is closed. Also, add a stopped channel to each stack to do the same for each stack-specific goroutine. Signed-off-by: Tom Wieczorek <twieczorek@mirantis.com> (cherry picked from commit 402c728)
Cancel the contexts with a cause. Add this cause to the log statements when exiting loops. Rename bundlePath to bundleDir to reflect the fact that it is a directory, not a file. Signed-off-by: Tom Wieczorek <twieczorek@mirantis.com> (cherry picked from commit edb105c)
Exit the loop on error and restart it after a one-minute delay to allow it to recover in a new run. Also replace the bespoke retry loop for stacks with the Kubernetes client's wait package. Signed-off-by: Tom Wieczorek <twieczorek@mirantis.com> (cherry picked from commit 404c6cf)
Seems to be a remnant from the past. Signed-off-by: Tom Wieczorek <twieczorek@mirantis.com> (cherry picked from commit c2beea7)
Signed-off-by: Ethan Mosbaugh <ethan@replicated.com> (cherry picked from commit 11b3197)
jnummelin
approved these changes
Nov 18, 2024
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Automated backport to
release-1.31, triggered by a label in #5062.See .