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Introduce es_java_home variable to allow setting JAVA_HOME #681
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This PR introduces a variable called
es_java_home
, which defaults to an empty string. If set to a non-empty string, that string is used to set the JAVA_HOME environment variable in the default config file (via thetemplates/elasticsearch.j2
template).If
es_java_home
is not changed from its default, the file generated from the template is unchanged. That is to say, this change should be entirely backwards-compatible.