Ivan Mitic created AMBARI-9972:
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Summary: Provide means to skip INSTALL commands when bits are
already installed on the node
Key: AMBARI-9972
URL: https://issues.apache.org/jira/browse/AMBARI-9972
Project: Ambari
Issue Type: Bug
Reporter: Ivan Mitic
Fix For: 2.0.0
To better support cloud deployments, Ambari should be able to recognize that
packages have already been preinstalled on the VM image, and skip the INSTALL
commands. Based on the measurements with latest Ambari 2.0 and HDP 2.2, INSTALL
phase takes ~3 minutes, so skipping these steps will contribute significantly
to the overall deployment latency.
Things are not as strait forward as mentioned above, as some components might
do some steps beyond just INSTALL, but that's ok given that these are
exceptions we can handle/eliminate on case-by-case basis.
Ambari preinstall and postinstall hooks can generally be run only once during
sys-prep so there shouldn't be any problems there.
Let's use this Jira to further discuss the design and come up with a patch that
will address this requirement.
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