Kaniko cannot download image via mirror

[Phylu]

Actual behavior

Kaniko cannot download the image via registry mirror and aborts with the following error:

$ /kaniko/executor --registry-mirror [REDACTED] --cache=true --cache-dir=/cache --context $CI_PROJECT_DIR --dockerfile $CI_PROJECT_DIR/Dockerfile --destination "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG" $BUILD_ARGS
INFO[0001] Using dockerignore file: /builds/zSBJNYyW/0/applications/pentaho/.dockerignore 
INFO[0001] Retrieving image manifest openjdk:8-jre-slim-buster 
ERRO[0001] Error while retrieving image from cache: openjdk:8-jre-slim-buster strict validation requires the registry to be explicitly defined 
INFO[0001] Retrieving image manifest openjdk:8-jre-slim-buster 

Expected behavior

The build succeeds

To Reproduce
Steps to reproduce the behavior:

1. Start the build
2. See how the build fails

Additional Information

• Dockerfile

FROM openjdk:8-jre-slim-buster

• Build Context: N/A
• Kaniko Image (fully qualified with digest): Current master state (7e3954a). The issue is not present in the stable version v1.6.0
• This bug seems to be a regresison of: When --cache true and --registry-mirror ... kaniko cannot find manifest #1172
• This bug was introduced with commit 4e218f2. The build works fine with the commit(s) before.

Triage Notes for the Maintainers

Description	Yes/No
Please check if this a new feature you are proposing
Please check if the build works in docker but not in kaniko
Please check if this error is seen when you use --cache flag
Please check if your dockerfile is a multistage dockerfile

[tbnguyen1407]

Hello, ran into this issue just now with 1.7.0 release. Any update on this?

[jbub]

@tbnguyen1407 probably related #1787

[nicolasjouveamue]

Hello,

Same problem here, I'm using gcr.io/kaniko-project/executor:debug to build with a private registry mirror.
GITLAB CI forces us to use the debug version (Seee https://docs.gitlab.com/ee/ci/docker/using_kaniko.html ), so I don't know how to use the 1.6 in the meantime...

[jbub]

use the gcr.io/kaniko-project/executor:v1.6.0-debug image

[nicolasjouveamue]

Thanks just see that

[Phylu]

It seems that the breaking commit ee31dc9 is already reverted on the master branch. @tejal29 It would be great if you can create an 1.7.1 bugfix release containing the bugfix. :)

[sylvaindd]

Same problem here, could really use a minor version here.

[Phylu]

@tejal29 @dlorenc @sharifelgamal Is it possible to create a hotfix release from the current master branch? This should resolve this issue, which currently renders kaniko unusable for all our builds :(

[dlorenc]

I'm no longer a maintainer here, sorry. Tejal/Sharif might be able to help.

[freehck]

Have just checked: the problem does not exist in the release v1.8.0 anymore.