Elek, Marton created HDDS-907:
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Summary: Use WAITFOR environment variable to handle dependencies
between ozone containers
Key: HDDS-907
URL: https://issues.apache.org/jira/browse/HDDS-907
Project: Hadoop Distributed Data Store
Issue Type: Improvement
Components: docker
Reporter: Elek, Marton
Until HDDS-839 we had a hard-coded 15 seconds sleep before we started
ozoneManager with the docker-compose files
(hadoop-ozone/dist/target/ozone-0.4.0-SNAPSHOT/compose).
For initialization of the OzoneManager we need the scm. Om will retry the
connection if scm is not available but the dns resolution is cached: if the dns
of scm is not available at the startup of om, it can't be initialized.
Before HDDS-839 we handled this dependency with the 15 seconds sleep, which was
usually slower what we need.
Now we can use the WAITFOR environment variables from HDDS-839 to handle this
dependency (like WAITFOR:scmL9876) which can be added to all the docker-compose
files.
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