Kafka release name check (#5770)

* Add default function from chart template to check release name match

* Increment chart version

* Update to latest _helpers.tpl

* Unset deprecated port created by kubernetes

* Revert change to zookeeper.fullname for  KAFKA_ZOOKEEPER_CONNECT var

* Update readme to clarify limitation

* Increment version number

* Bump chart version, not appversion

* Alter maintainers to have github username for CI

incubator/kafka/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 description: Apache Kafka is publish-subscribe messaging rethought as a distributed
   commit log.
 name: kafka
-version: 0.7.3
+version: 0.7.4
 appVersion: 4.0.1
 keywords:
 - kafka
@@ -15,10 +15,10 @@ sources:
 - https://github.com/confluentinc/cp-docker-images
 - https://github.com/apache/kafka
 maintainers:
-- name: Faraaz Khan
+- name: faraazkhan
   email: faraaz@rationalizeit.us
-- name: Marc Villacorta
+- name: h0tbird
   email: marc.villacorta@gmail.com
-- name: Ben Goldberg
+- name: benjigoldberg
   email: ben@spothero.com
 icon: https://kafka.apache.org/images/logo.png

incubator/kafka/README.md

@@ -187,7 +187,7 @@ such port at a time, setting the range at every Kafka pod is a reasonably safe c
 
 * Topic creation is not automated
 * Only supports storage options that have backends for persistent volume claims (tested mostly on AWS)
-* There must not exist a service called `kafka` in the same namespace
+* KAFKA_PORT will be created as an envvar and brokers will fail to start when there is a service named `kafka` in the same namespace. We work around this be unsetting that envvar `unset KAFKA_PORT`.
 
 [brokerconfigs]: https://kafka.apache.org/documentation/#brokerconfigs
 

incubator/kafka/templates/_helpers.tpl

@@ -9,11 +9,20 @@ Expand the name of the chart.
 {{/*
 Create a default fully qualified app name.
 We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
 */}}
 {{- define "kafka.fullname" -}}
+{{- if .Values.fullnameOverride -}}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
 {{- $name := default .Chart.Name .Values.nameOverride -}}
+{{- if contains $name .Release.Name -}}
+{{- .Release.Name | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
 {{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
 {{- end -}}
+{{- end -}}
+{{- end -}}
 
 {{/*
 Create a default fully qualified zookeeper name.
@@ -38,3 +47,10 @@ else use user-provided URL
 {{- default $zookeeperConnect $zookeeperConnectOverride }}
 {{- end -}}
 {{- end -}}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "kafka.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}

incubator/kafka/templates/statefulset.yaml

@@ -159,6 +159,7 @@ spec:
         - sh
         - -exc
         - |
+          unset KAFKA_PORT && \
           export KAFKA_BROKER_ID=${HOSTNAME##*-} && \
           export KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://${POD_IP}:9092{{ if kindIs "string" $advertisedListenersOverride }}{{ printf ",%s" $advertisedListenersOverride }}{{ end }} && \
           exec /etc/confluent/docker/run