Adds a variant with scale 1 + localhost listener + auto topic creation

Author: solsson

README.md

@@ -39,9 +39,11 @@ and though they still seem to work you can get around that with a v1.14+ kubectl
 
 ```
 kubectl create namespace kafka && \
-kubectl apply -k github.com/Yolean/kubernetes-kafka/variants/scale-1-ephemeral/?ref=master
+kubectl apply -k github.com/Yolean/kubernetes-kafka/variants/dev-small/?ref=v6.0.0
 ```
 
+When all pods are Ready, test with for example `kafkacat -b localhost:9094 -L` over `kubectl -n kafka port-forward kafka-0 9094`.
+
 ### Maintaining your own kustomization
 
 Start your variant as a new folder in your choice of version control, with a base `kustomization.yaml` pointing to a tag or revision in this repository:

variants/dev-small/auto-create-topics.json

@@ -0,0 +1,6 @@
+[
+  {"op": "add", "path": "/spec/template/spec/containers/0/command/-", "value": "--override"},
+  {"op": "add", "path": "/spec/template/spec/containers/0/command/-", "value": "advertised.listeners=PLAINTEXT://:9092,OUTSIDE://localhost:9094"},
+  {"op": "add", "path": "/spec/template/spec/containers/0/command/-", "value": "--override"},
+  {"op": "add", "path": "/spec/template/spec/containers/0/command/-", "value": "auto.create.topics.enable=true"}
+]

variants/dev-small/kustomization.yaml

@@ -0,0 +1,16 @@
+# With kubectl -n kafka port-forward kafka-0 9094
+bases:
+- ../scale-1-ephemeral
+patchesJson6902:
+- target:
+    group: apps
+    version: v1
+    kind: StatefulSet
+    name: kafka
+  path: listener-localhost.json
+- target:
+    group: apps
+    version: v1
+    kind: StatefulSet
+    name: kafka
+  path: auto-create-topics.json

variants/dev-small/listener-localhost.json

@@ -0,0 +1,6 @@
+[
+  {"op": "add", "path": "/spec/template/spec/containers/0/command/-", "value": "--override"},
+  {"op": "add", "path": "/spec/template/spec/containers/0/command/-", "value": "advertised.listeners=PLAINTEXT://:9092,OUTSIDE://localhost:9094"},
+  {"op": "add", "path": "/spec/template/spec/containers/0/command/-", "value": "--override"},
+  {"op": "add", "path": "/spec/template/spec/containers/0/command/-", "value": "auto.create.topics.enable=true"}
+]