Issue
I was trying to build the docker image for a project I'm working onto. It's based on jhipster, after configuring the project it tells me to run the following maven command:
./mvnw -ntp -Pprod verify jib:dockerBuild
Unfortunately it doesn't seem to work, it returns me this errors:
[WARNING] The credential helper (docker-credential-pass) has nothing for server URL: registry.hub.docker.com
...
[WARNING] The credential helper (docker-credential-pass) has nothing for server URL: index.docker.io
[WARNING]
And finally fails with:
[ERROR] Failed to execute goal com.google.cloud.tools:jib-maven-plugin:2.4.0:dockerBuild (default-cli) on project booking: (null exception message): NullPointerException -> [Help 1]
Recently I worked on a google cloud project, and I edited the ~/.docker/config.json configuration file. I had to remove google's configuration entries to sort out another problem. Could that be the origin of the problem I'm facing now?
I've tried to do docker logout and docker login without success.
Solution
Some considerations
I don't know if editing manually the configuration caused the error, in fact I'm pretty sure to have deleted only google-related entries, but nothing referring to docker.* or similar.
To solve this issue, avoid to edit manually the docker configuration file. In fact I think that it should be avoided whenever possible, to avoid configuration problems of any sort.
Instead, just follow what the error message is trying to tell you: docker is not able to access those urls. Excluding network problems (which you can troubleshoot with ping registry-1.docker.io for example), it should be an authentication problem.
How to fix
I've found out that running those commands fixed it:
docker login registry.hub.docker.com
docker login registry-1.docker.io
I don't know if registry-1.docker.io is just a mirror of the other first server, which the plugin tries to access after the first unsuccessful connection. You can try to loging to registry.hub.docker.com and re-launch the command to see if it sufficient. In case it's not, login to the second one and then it will work.
Answered By - funder7
Answer Checked By - Katrina (JavaFixing Volunteer)
