Transition from init container to sidecar,

for future dynamic config support.
Can be evaluated manually now (with Kafka 1.1.0) by exec
to config pod and edit of server.properties there.

If the init container is slow, which is unlikely,
kafka will crash loop until server.properties exists
and upon existence start normally.

Author: solsson

kafka/10broker-config.yml

@@ -45,6 +45,9 @@ data:
       fi
     }
 
+    echo "Completed initial config. Staying alive to support Kafka 1.1.0 dynamic config updates"
+    tail -f /dev/null
+
   server.properties: |-
     ############################# Log Basics #############################
 

kafka/50kafka.yml

@@ -18,8 +18,8 @@ spec:
       annotations:
     spec:
       terminationGracePeriodSeconds: 30
-      initContainers:
-      - name: init-config
+      containers:
+      - name: config
         image: solsson/kafka-initutils@sha256:18bf01c2c756b550103a99b3c14f741acccea106072cd37155c6d24be4edd6e2
         env:
         - name: NODE_NAME
@@ -40,7 +40,6 @@ spec:
           mountPath: /etc/kafka-configmap
         - name: config
           mountPath: /etc/kafka
-      containers:
       - name: broker
         image: solsson/kafka:1.0.1@sha256:1a4689d49d6274ac59b9b740f51b0408e1c90a9b66d16ad114ee9f7193bab111
         env: