From ab9f099a07430c7a196a0ebca454e6408a2c6349 Mon Sep 17 00:00:00 2001
From: Tom Dooner <tom.dooner@brigade.com>
Date: Wed, 6 May 2015 23:18:49 +0000
Subject: [PATCH] Allow KAFKA_REST_INSTANCE_ID_VARIABLE which will be
 deferenced

For instance, if you're running this on Marathon where you get a
MESOS_TASK_ID variable, you can pass in
`KAFKA_REST_INSTANCE_ID_VARIABLE=MESOS_TASK_ID` which will then be
deferenced to set `KAFKA_REST_INSTANCE_ID=[value of $MESOS_TASK_ID]`.
---
 run.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/run.sh b/run.sh
index ac303cf..9a5c8a7 100755
--- a/run.sh
+++ b/run.sh
@@ -1,10 +1,15 @@
 #!/bin/bash
 
+: ${KAFKA_REST_INSTANCE_ID_VARIABLE}
 : ${KAFKA_REST_INSTANCE_ID}
 : ${ADVERTISED_HOSTNAME}
 : ${SCHEMA_REGISTRY_URL}
 : ${ZOOKEEPER_URL}
 
+if [ -n "${KAFKA_REST_INSTANCE_ID_VARIABLE}" ]; then
+  KAFKA_REST_INSTANCE_ID=${!KAFKA_REST_INSTANCE_ID_VARIABLE}
+fi
+
 cat >/etc/kafka-rest/kafka-rest.properties <<EOF
 id=${KAFKA_REST_INSTANCE_ID:-1}
 schema.registry.url=${SCHEMA_REGISTRY_URL:-http://localhost:8081}