Leave zot repositories in a consistent state after zot hits fd limit closes #359

[adodon2go]

Signed-off-by: Alexei Dodon adodon@cisco.com

What type of PR is this?
bug

Which issue does this PR fix:
#359

What does this PR do / Why do we need it:

1. Prevents zot from crashing when FD limit reached
2. Performs blobs/manifest cleanup to leave zot image repository in a consistent state

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

Merging #381 (df7e1e6) into main (ba41368) will increase coverage by 0.34%.
The diff coverage is 95.91%.

❗ Current head df7e1e6 differs from pull request most recent head c19f594. Consider uploading reports for the commit c19f594 to get more accurate results

@@            Coverage Diff             @@
##             main     #381      +/-   ##
==========================================
+ Coverage   84.47%   84.81%   +0.34%     
==========================================
  Files          51       51              
  Lines       10548    10567      +19     
==========================================
+ Hits         8910     8962      +52     
+ Misses       1282     1244      -38     
- Partials      356      361       +5     

Impacted Files	Coverage Δ
pkg/api/routes.go	76.89% <94.28%> (+2.09%)	⬆️
pkg/api/errors.go	100.00% <100.00%> (ø)
pkg/storage/storage_fs.go	80.93% <100.00%> (+1.76%)	⬆️
pkg/extensions/sync/sync.go	85.51% <0.00%> (-1.38%)	⬇️

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[rchincha]

lgtm