76afb70790
* Add support for configurable compression algorithm (gzip, zstd) and compression level We want to make the layer compression in kaniko configurable, so we have added two optional command line arguments “--compression” and “--compression-level”. The former allows the user to specify a compression algorithm (zstd, gzip) and the latter can be used to specify the compression level. Depending on the selected compression algorithm and level we modify the set of layerOptions that are used to create tarball layers in `push.go` and `build.go`. The actual implementation of the zstd support can be found in our fork of the go-containerregistry package for which we have filed this PR: google/go-containerregistry#1487 The changes should be fully backwards compatible. * Restrict inputs for compression flag to gzip and zstd This change will ensure that users can only specify supported compression algorithms (`zstd`, `gzip`) to the `--compression` flag. * Fix incorrect type for switch statements on config.Compression |
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