Aki Sukegawa created THRIFT-3907:
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Summary: Skip Docker image build on CI when unchanged
Key: THRIFT-3907
URL: https://issues.apache.org/jira/browse/THRIFT-3907
Project: Thrift
Issue Type: Improvement
Reporter: Aki Sukegawa
Assignee: Aki Sukegawa
Previously we were able to reuse Docker layers from prebuilt images pulled from
docker hub.
This has been reducing total build time by 3 hours out of 7~8 hours total.
After Docker 1.10 or so, it is no longer possible and we tend to easily
saturate entire Apache's 30 jobs on Travis-CI.
Standard solution as of now is to use docker save/load.
This typically requires automated file upload on CI to some external storage.
Unfortunately it cannot be done with our current Travis-CI account settings.
To workaround this, we can put Dockerfile itself to Docker image and see if
it's modified after the prebuild time and skip fresh builds if unchanged.
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