From 29b519a7a7ba83721cdd21b2c5f80f0e6e62dda8 Mon Sep 17 00:00:00 2001
From: EylonLevy <46627613+EylonLevy@users.noreply.github.com>
Date: Fri, 10 Mar 2023 11:22:02 +0200
Subject: [PATCH] Add ability to add config files when using druid on
 Kubernetes (#13795)

You can now add additional configuration files to be copied to the final conf directory on startup when running in a containerized environment. Useful for running on Kubernetes and needing to add more files with a config map. To specify the path where the configMap is mounted, utilize the DRUID_ADDITIONAL_CONF_DIR environment variable.
---
 distribution/docker/druid.sh | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/distribution/docker/druid.sh b/distribution/docker/druid.sh
index b51419991fe..1bc2f4f071a 100755
--- a/distribution/docker/druid.sh
+++ b/distribution/docker/druid.sh
@@ -40,6 +40,10 @@
 # - DRUID_CONFIG_COMMON -- full path to a file for druid 'common' properties
 # - DRUID_CONFIG_${service} -- full path to a file for druid 'service' properties
 # - DRUID_SINGLE_NODE_CONF -- config to use at runtime. Choose from: {large, medium, micro-quickstart, nano-quickstart, small, xlarge}
+# - DRUID_ADDITIONAL_CLASSPATH -- a list of colon-separated paths that will be added to the classpath of druid processes. 
+#                                 These paths can include jars, additional configuration folders (such as HDFS config), etc.
+#                                 It is important to ensure that these paths must exist in the environment druid runs in if they are not part of the distribution.
+
 
 set -e
 SERVICE="$1"
@@ -196,4 +200,4 @@ then
     mkdir -p ${DRUID_DIRS_TO_CREATE}
 fi
 
-exec bin/run-java ${JAVA_OPTS} -cp $COMMON_CONF_DIR:$SERVICE_CONF_DIR:lib/*: org.apache.druid.cli.Main server $@
+exec bin/run-java ${JAVA_OPTS} -cp $COMMON_CONF_DIR:$SERVICE_CONF_DIR:lib/*:$DRUID_ADDITIONAL_CLASSPATH org.apache.druid.cli.Main server $@