README.md

Kafka MirrorMaker Helm Chart

Helm Chart for Production Grade Kafka MirrorMaker deployment on Kubernetes inspired by Confluent Helm charts (https://github.com/confluentinc/cp-helm-charts)

Pre-requirements:

• Kubectl
• GKE Cluster (Kubernetes 1.9.2+)
• Helm 2.8.2+
• A healthy and accessible Kafka Cluster

Deployment on GKE:

// create cluster
gcloud container clusters create test
gcloud container clusters get-credentials test

//initialise helm
helm init

// override helm issue with rbac
kubectl create serviceaccount --namespace kube-system tiller
kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
kubectl patch deploy --namespace kube-system tiller-deploy -p '{"spec":{"template":{"spec":{"serviceAccount":"tiller"}}}}'

//deploy mirrormaker
helm install --set kafka.consumerConfig.bootstrap\.servers="dev3-kafka:9092",kafka.producerConfig.bootstrap\.servers="dev4-kafka:9092"  ./og-kafka-mm/

Docker Image Source:

• DockerHub -> opsguruhub

(Also included in ./docker-src)

Kafka MirrorMaker Deployment

The configuration parameters in this section control the resources requested and utilized by the og-kafka-mm chart.

Parameter	Description	Default
replicaCount	The number of Kafka Kafka MirrorMaker Servers.	1

Image

Parameter	Description	Default
image	Docker Image of Kafka MirrorMaker.	opsguruhub/og-kafka-mm
imageTag	Docker Image Tag of Kafka MirrorMaker.	latest
imagePullPolicy	Docker Image Tag of Kafka MirrorMaker.	IfNotPresent
imagePullSecrets	Secrets to be used for private registries.	see values.yaml for details

Kafka MM JVM Heap Options

Parameter	Description	Default
heapOptions	The JVM Heap Options for Kafka MirrorMaker	"-Xms1024M -Xmx1024M"

Resources

Parameter	Description	Default
resources.requests.cpu	The amount of CPU to request.	see values.yaml for details
resources.requests.memory	The amount of memory to request.	see values.yaml for details
resources.requests.limit	The upper limit CPU usage for a Kafka Connect Pod.	see values.yaml for details
resources.requests.limit	The upper limit memory usage for a Kafka Connect Pod.	see values.yaml for details

Annotations

Parameter	Description	Default
podAnnotations	Map of custom annotations to attach to the pod spec.	{}

JMX Configuration

Parameter	Description	Default
jmx.port	The jmx port which JMX style metrics are exposed.	9998
jmx.enabled	Whether or not to install Prometheus JMX Exporter as a sidecar container and expose JMX metrics to Prometheus.	true

Prometheus JMX Exporter Configuration

Parameter	Description	Default
prometheus.jmx.image	Docker Image for Prometheus JMX Exporter container.	solsson/kafka-prometheus-jmx-exporter@sha256
prometheus.jmx.imageTag	Docker Image Tag for Prometheus JMX Exporter container.	6f82e2b0464f50da8104acd7363fb9b995001ddff77d248379f8788e78946143
prometheus.jmx.port	JMX Exporter Port which exposes metrics in Prometheus format for scraping.	5556
prometheus.jmx.resources	JMX Exporter resources configuration.	see values.yaml for details

Deployment Topology

Parameter	Description	Default
nodeSelector	Dictionary containing key-value-pairs to match labels on nodes. When defined pods will only be scheduled on nodes, that have each of the indicated key-value pairs as labels. Further information can be found in the Kubernetes documentation	{}
tolerations	Array containing taint references. When defined, pods can run on nodes, which would otherwise deny scheduling. Further information can be found in the Kubernetes documentation	{}

Dependencies

Kafka

Parameter	Description	Default
kafka.topicWhitelist	Regex for a topic whitelist	".*"
kafka.numStreams	Number of consumers to create	"1"
kafka.overrideGroupId	Specify custom group.id. Do not specify group.id in kafka.consumerConfig - use this variable to override the default	".Release.Name"
kafka.consumerProperties	Kafka consumer settings. This should include kafka.bootstrap.servers
kafka.producerProperties	Kafka producer settings. This should include kafka.bootstrap.servers