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allow druid.host to be undefined to use canonical hostname (#9019) 

It is currently not possible to unset the druid.host property in the docker image to let Druid default to the canonical hostname. It always gets set to the container's IP address. Passing the override environment variable druid_host= unfortunately does not solve the problem, as this gets interpreted as empty string and does not let the default kick in.

This change adds the option to pass DRUID_SET_HOST=0 as environment variable to disable the default behavior, and allows passing a common runtime.properties file without druid.host.
This commit is contained in:
Xavier Léauté 2019-12-12 13:51:57 -08:00 committed by GitHub
parent 13c33c1766
commit 810b85a352
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1 changed files with 6 additions and 2 deletions
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8
distribution/docker/druid.sh
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@ -92,7 +92,11 @@ then
setKey _common druid.zk.service.host "${ZOOKEEPER}"
fi
setKey $SERVICE druid.host $(ip r get 1 | awk '{print $7;exit}')
DRUID_SET_HOST=${DRUID_SET_HOST:-1}
if [ "${DRUID_SET_HOST}" = "1" ]
then
setKey $SERVICE druid.host $(ip r get 1 | awk '{print $7;exit}')
fi
env | grep ^druid_ | while read evar;
do
@ -145,4 +149,4 @@ then
fi
mkdir -p var/tmp var/druid/segments var/druid/indexing-logs var/druid/task var/druid/hadoop-tmp var/druid/segment-cache
exec java ${JAVA_OPTS} -cp $COMMON_CONF_DIR:$SERVICE_CONF_DIR:lib/*: org.apache.druid.cli.Main server $@
exec java ${JAVA_OPTS} -cp $COMMON_CONF_DIR:$SERVICE_CONF_DIR:lib/*: org.apache.druid.cli.Main server $@