@helm-charts/bitnami-kafka v1.9.0-0.1.0
@helm-charts/bitnami-kafka
Apache Kafka is a distributed streaming platform.
Field | Value |
---|---|
Repository Name | bitnami |
Chart Name | kafka |
Chart Version | 1.9.0 |
NPM Package Version | 0.1.0 |
## Global Docker image parameters
## Please, note that this will override the image parameters, including dependencies, configured to use the global value
## Current available global Docker image parameters: imageRegistry and imagePullSecrets
##
# global:
# imageRegistry: myRegistryName
# imagePullSecrets:
# - myRegistryKeySecretName
## Bitnami Kafka image version
## ref: https://hub.docker.com/r/bitnami/kafka/tags/
##
image:
registry: docker.io
repository: bitnami/kafka
tag: 2.2.0
## Specify a imagePullPolicy
## Defaults to 'Always' if image tag is 'latest', else set to 'IfNotPresent'
## ref: http://kubernetes.io/docs/user-guide/images/#pre-pulling-images
##
pullPolicy: Always
## Optionally specify an array of imagePullSecrets.
## Secrets must be manually created in the namespace.
## ref: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/
##
# pullSecrets:
# - myRegistryKeySecretName
## Set to true if you would like to see extra information on logs
## It turns BASH and NAMI debugging in minideb
## ref: https://github.com/bitnami/minideb-extras/#turn-on-bash-debugging
debug: false
## StatefulSet controller supports automated updates. There are two valid update strategies: RollingUpdate and OnDelete
## ref: https://kubernetes.io/docs/tutorials/stateful-application/basic-stateful-set/#updating-statefulsets
##
updateStrategy: RollingUpdate
## Partition update strategy
## https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/#partitions
##
# rollingUpdatePartition:
replicaCount: 1
config: |-
# broker.id=-1
# listeners=PLAINTEXT://:9092
# advertised.listeners=PLAINTEXT://KAFKA_IP:9092
# num.network.threads=3
# num.io.threads=8
# socket.send.buffer.bytes=102400
# socket.receive.buffer.bytes=102400
# socket.request.max.bytes=104857600
# log.dirs=/opt/bitnami/kafka/data
# num.partitions=1
# num.recovery.threads.per.data.dir=1
# offsets.topic.replication.factor=1
# transaction.state.log.replication.factor=1
# transaction.state.log.min.isr=1
# log.flush.interval.messages=10000
# log.flush.interval.ms=1000
# log.retention.hours=168
# log.retention.bytes=1073741824
# log.segment.bytes=1073741824
# log.retention.check.interval.ms=300000
# zookeeper.connect=ZOOKEEPER_SERVICE_NAME
# zookeeper.connection.timeout.ms=6000
# group.initial.rebalance.delay.ms=0
## Kafka docker image available customizations
## https://github.com/bitnami/bitnami-docker-kafka#configuration
##
## Allow to use the PLAINTEXT listener.
allowPlaintextListener: true
## The address the socket server listens on.
# listeners:
## Hostname and port the broker will advertise to producers and consumers.
# advertisedListeners:
## ID of the Kafka node.
brokerId: -1
## Switch to enable topic deletion or not.
deleteTopicEnable: false
## Kafka's Java Heap size.
heapOpts: -Xmx1024m -Xms1024m
## The number of messages to accept before forcing a flush of data to disk.
logFlushIntervalMessages: 10000
## The maximum amount of time a message can sit in a log before we force a flush.
logFlushIntervalMs: 1000
## A size-based retention policy for logs.
logRetentionBytes: _1073741824
## The interval at which log segments are checked to see if they can be deleted.
logRetentionCheckIntervalMs: 300000
## The minimum age of a log file to be eligible for deletion due to age.
logRetentionHours: 168
## The maximum size of a log segment file. When this size is reached a new log segment will be created.
logSegmentBytes: _1073741824
## Log message format version
logMessageFormatVersion: ''
## A comma separated list of directories under which to store log files.
logsDirs: /opt/bitnami/kafka/data
## The largest record batch size allowed by Kafka
maxMessageBytes: _1000012
## Default replication factors for automatically created topics
defaultReplicationFactor: 1
## The replication factor for the offsets topic
offsetsTopicReplicationFactor: 1
## The replication factor for the transaction topic
transactionStateLogReplicationFactor: 1
## Overridden min.insync.replicas config for the transaction topic
transactionStateLogMinIsr: 1
## The number of threads doing disk I/O.
numIoThreads: 8
## The number of threads handling network requests.
numNetworkThreads: 3
## The default number of log partitions per topic.
numPartitions: 1
## The number of threads per data directory to be used for log recovery at startup and flushing at shutdown.
numRecoveryThreadsPerDataDir: 1
## The receive buffer (SO_RCVBUF) used by the socket server.
socketReceiveBufferBytes: 102400
## The maximum size of a request that the socket server will accept (protection against OOM).
socketRequestMaxBytes: _104857600
## The send buffer (SO_SNDBUF) used by the socket server.
socketSendBufferBytes: 102400
## Timeout in ms for connecting to zookeeper.
zookeeperConnectionTimeoutMs: 6000
## Authentication parameteres
## https://github.com/bitnami/bitnami-docker-kafka#security
##
auth:
## Switch to enable the kafka authentication.
enabled: false
## Name of the existing secret containing credentials for brokerUser, interBrokerUser and zookeeperUser.
#existingSecret:
## Name of the existing secret containing the certificate files that will be used by Kafka.
#certificatesSecret:
## Password for the above certificates if they are password protected.
#certificatesPassword:
## Kafka client user.
brokerUser: user
## Kafka client password.
# brokerPassword:
## Kafka inter broker communication user.
interBrokerUser: admin
## Kafka inter broker communication password.
# interBrokerPassword:
## Kafka Zookeeper user.
#zookeeperUser:
## Kafka Zookeeper password.
#zookeeperPassword:
## Kubernetes Security Context
## https://kubernetes.io/docs/tasks/configure-pod-container/security-context/
##
securityContext:
enabled: true
fsGroup: 1001
runAsUser: 1001
## Kubernetes configuration
## For minikube, set this to NodePort, elsewhere use LoadBalancer
##
service:
type: ClusterIP
port: 9092
## Specify the NodePort value for the LoadBalancer and NodePort service types.
## ref: https://kubernetes.io/docs/concepts/services-networking/service/#type-nodeport
##
# nodePort:
## Use loadBalancerIP to request a specific static IP,
# loadBalancerIP:
## Service annotations done as key:value pairs
annotations:
## Kafka data Persistent Volume Storage Class
## If defined, storageClassName: <storageClass>
## If set to "-", storageClassName: "", which disables dynamic provisioning
## If undefined (the default) or set to null, no storageClassName spec is
## set, choosing the default provisioner. (gp2 on AWS, standard on
## GKE, AWS & OpenStack)
##
persistence:
enabled: true
# storageClass: "-"
accessModes:
- ReadWriteOnce
size: 8Gi
annotations: {}
## Node labels and tolerations for pod assignment
## ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#nodeselector
## ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#taints-and-tolerations-beta-feature
nodeSelector: {}
tolerations: []
## Configure resource requests and limits
## ref: http://kubernetes.io/docs/user-guide/compute-resources/
##
resources:
# limits:
# cpu: 200m
# memory: 1Gi
# requests:
# memory: 256Mi
# cpu: 250m
## Configure extra options for liveness and readiness probes
## ref: https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-probes/#configure-probes)
livenessProbe:
enabled: true
initialDelaySeconds: 10
periodSeconds: 10
timeoutSeconds: 5
failureThreshold: 2
successThreshold: 1
readinessProbe:
enabled: true
initialDelaySeconds: 5
periodSeconds: 10
timeoutSeconds: 5
failureThreshold: 6
successThreshold: 1
## Prometheus Exporters / Metrics
##
metrics:
## Prometheus Kafka Exporter: exposes complimentary metrics to JMX Exporter
kafka:
enabled: false
image:
registry: docker.io
repository: danielqsj/kafka-exporter
tag: v1.0.1
pullPolicy: Always
## Optionally specify an array of imagePullSecrets.
## Secrets must be manually created in the namespace.
## ref: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/
##
# pullSecrets:
# - myRegistryKeySecretName
## Interval at which Prometheus scrapes metrics, note: only used by Prometheus Operator
interval: 10s
## Port kafka-exporter exposes for Prometheus to scrape metrics
port: 9308
## Resource limits
resources: {}
# limits:
# cpu: 200m
# memory: 1Gi
# requests:
# cpu: 100m
# memory: 100Mi
## Prometheus JMX Exporter: exposes the majority of Kafkas metrics
jmx:
enabled: false
image:
registry: docker.io
repository: solsson/kafka-prometheus-jmx-exporter@sha256
tag: a23062396cd5af1acdf76512632c20ea6be76885dfc20cd9ff40fb23846557e8
pullPolicy: Always
## Optionally specify an array of imagePullSecrets.
## Secrets must be manually created in the namespace.
## ref: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/
##
# pullSecrets:
# - myRegistryKeySecretName
## Interval at which Prometheus scrapes metrics, note: only used by Prometheus Operator
interval: 10s
## Port jmx-exporter exposes Prometheus format metrics to scrape
exporterPort: 5556
resources:
{}
# limits:
# cpu: 200m
# memory: 1Gi
# requests:
# cpu: 100m
# memory: 100Mi
## Credits to the incubator/kafka chart for the JMX configuration.
## https://github.com/helm/charts/tree/master/incubator/kafka
##
## Rules to apply to the Prometheus JMX Exporter. Note while lots of stats have been cleaned and exposed,
## there are still more stats to clean up and expose, others will never get exposed. They keep lots of duplicates
## that can be derived easily. The configMap in this chart cleans up the metrics it exposes to be in a Prometheus
## format, eg topic, broker are labels and not part of metric name. Improvements are gladly accepted and encouraged.
configMap:
## Allows disabling the default configmap, note a configMap is needed
enabled: true
## Allows setting values to generate confimap
## To allow all metrics through (warning its crazy excessive) comment out below `overrideConfig` and set
## `whitelistObjectNames: []`
overrideConfig:
{}
# jmxUrl: service:jmx:rmi:///jndi/rmi://127.0.0.1:5555/jmxrmi
# lowercaseOutputName: true
# lowercaseOutputLabelNames: true
# ssl: false
# rules:
# - pattern: ".*"
## If you would like to supply your own ConfigMap for JMX metrics, supply the name of that
## ConfigMap as an `overrideName` here.
overrideName: ''
## Port the jmx metrics are exposed in native jmx format, not in Prometheus format
jmxPort: 5555
## JMX Whitelist Objects, can be set to control which JMX metrics are exposed. Only whitelisted
## values will be exposed via JMX Exporter. They must also be exposed via Rules. To expose all metrics
## (warning its crazy excessive and they aren't formatted in a prometheus style) (1) `whitelistObjectNames: []`
## (2) commented out above `overrideConfig`.
whitelistObjectNames: # []
- kafka.controller:*
- kafka.server:*
- java.lang:*
- kafka.network:*
- kafka.log:*
##
## Zookeeper chart configuration
##
## https://github.com/bitnami/charts/blob/master/bitnami/zookeeper/values.yaml
##
zookeeper:
enabled: true
externalZookeeper:
## This value is only used when zookeeper.enabled is set to false
## Server or list of external zookeeper servers to use.
# servers:
Kafka
Kafka is a distributed streaming platform used for building real-time data pipelines and streaming apps. It is horizontally scalable, fault-tolerant, wicked fast, and runs in production in thousands of companies.
TL;DR;
$ helm install bitnami/kafka
Introduction
This chart bootstraps a Kafka deployment on a Kubernetes cluster using the Helm package manager.
Bitnami charts can be used with Kubeapps for deployment and management of Helm Charts in clusters. This Helm chart has been tested on top of Bitnami Kubernetes Production Runtime (BKPR). Deploy BKPR to get automated TLS certificates, logging and monitoring for your applications.
Prerequisites
- Kubernetes 1.4+ with Beta APIs enabled
- PV provisioner support in the underlying infrastructure
Installing the Chart
To install the chart with the release name my-release
:
$ helm install --name my-release bitnami/kafka
The command deploys Kafka on the Kubernetes cluster in the default configuration. The configuration section lists the parameters that can be configured during installation.
Tip: List all releases using
helm list
Uninstalling the Chart
To uninstall/delete the my-release
deployment:
$ helm delete my-release
The command removes all the Kubernetes components associated with the chart and deletes the release.
Configuration
The following tables lists the configurable parameters of the Kafka chart and their default values.
Parameter | Description | Default |
---|---|---|
global.imageRegistry | Global Docker image registry | nil |
global.imagePullSecrets | Global Docker registry secret names as an array | [] (does not add image pull secrets to deployed pods) |
image.registry | Kafka image registry | docker.io |
image.repository | Kafka Image name | bitnami/kafka |
image.tag | Kafka Image tag | {VERSION} |
image.pullPolicy | Kafka image pull policy | Always |
image.pullSecrets | Specify docker-registry secret names as an array | [] (does not add image pull secrets to deployed pods) |
image.debug | Specify if debug values should be set | false |
updateStrategy | Update strategy for the stateful set | RollingUpdate |
rollingUpdatePartition | Partition update strategy | nil |
replicaCount | Number of Kafka nodes | 1 |
config | Configuration file for Kafka | nil |
allowPlaintextListener | Allow to use the PLAINTEXT listener | true |
listeners | The address the socket server listens on. | nil |
advertisedListeners | Hostname and port the broker will advertise to producers and consumers. | nil |
brokerId | ID of the Kafka node | -1 |
deleteTopicEnable | Switch to enable topic deletion or not. | false |
heapOpts | Kafka's Java Heap size. | -Xmx1024m -Xms1024m |
logFlushIntervalMessages | The number of messages to accept before forcing a flush of data to disk. | 10000 |
logFlushIntervalMs | The maximum amount of time a message can sit in a log before we force a flush. | 1000 |
logRetentionBytes | A size-based retention policy for logs. | _1073741824 |
logRetentionCheckIntervalMs | The interval at which log segments are checked to see if they can be deleted. | 300000 |
logRetentionHours | The minimum age of a log file to be eligible for deletion due to age. | 168 |
logSegmentBytes | The maximum size of a log segment file. When this size is reached a new log segment will be created. | _1073741824 |
logMessageFormatVersion | Logging message format version. |
|
logsDirs | A comma separated list of directories under which to store log files. | /opt/bitnami/kafka/data |
maxMessageBytes | The largest record batch size allowed by Kafka. | 1000012 |
defaultReplicationFactor | Default replication factors for automatically created topics | 1 |
offsetsTopicReplicationFactor | The replication factor for the offsets topic | 1 |
transactionStateLogReplicationFactor | The replication factor for the transaction topic | 1 |
transactionStateLogMinIsr | Overridden min.insync.replicas config for the transaction topic | 1 |
numIoThreads | The number of threads doing disk I/O. | 8 |
numNetworkThreads | The number of threads handling network requests. | 3 |
numPartitions | The default number of log partitions per topic. | 1 |
numRecoveryThreadsPerDataDir | The number of threads per data directory to be used for log recovery at startup and flushing at shutdown. | 1 |
socketReceiveBufferBytes | The receive buffer (SO_RCVBUF) used by the socket server. | 102400 |
socketRequestMaxBytes | The maximum size of a request that the socket server will accept (protection against OOM). | _104857600 |
socketSendBufferBytes | The send buffer (SO_SNDBUF) used by the socket server. | 102400 |
zookeeperConnectionTimeoutMs | Timeout in ms for connecting to zookeeper. | 6000 |
auth.enabled | Switch to enable the kafka authentication. | false |
auth.existingSecret | Name of the existing secret containing credentials for brokerUser, interBrokerUser and zookeeperUser. | nil |
auth.certificatesSecret | Name of the existing secret containing the certificate files that will be used by Kafka. | nil |
auth.certificatesPassword | Password for the above certificates if they are password protected. | nil |
auth.brokerUser | Kafka client user. | user |
auth.brokerPassword | Kafka client password. | nil |
auth.interBrokerUser | Kafka inter broker communication user | admin |
auth.interBrokerPassword | Kafka inter broker communication password. | nil |
auth.zookeeperUser | Kafka Zookeeper user. | nil |
auth.zookeeperPassword | Kafka Zookeeper password. | nil |
securityContext.enabled | Enable security context | true |
securityContext.fsGroup | Group ID for the container | 1001 |
securityContext.runAsUser | User ID for the container | 1001 |
service.type | Kubernetes Service type | ClusterIP |
service.port | Kafka port | 9092 |
service.nodePort | Kubernetes Service nodePort | nil |
service.loadBalancerIP | loadBalancerIP for Kafka Service | nil |
service.annotations | Service annotations |
|
persistence.enabled | Enable persistence using PVC | true |
persistence.storageClass | PVC Storage Class for Kafka volume | nil |
persistence.accessMode | PVC Access Mode for Kafka volume | ReadWriteOnce |
persistence.size | PVC Storage Request for Kafka volume | 8Gi |
persistence.annotations | Annotations for the PVC | {} |
nodeSelector | Node labels for pod assignment | {} |
tolerations | Toleration labels for pod assignment | [] |
resources | CPU/Memory resource requests/limits | Memory: 256Mi , CPU: 250m |
livenessProbe.enabled | would you like a livessProbed to be enabled | true |
livenessProbe.initialDelaySeconds | Delay before liveness probe is initiated | 30 |
livenessProbe.periodSeconds | How often to perform the probe | 10 |
livenessProbe.timeoutSeconds | When the probe times out | 5 |
livenessProbe.failureThreshold | Minimum consecutive failures for the probe to be considered failed after having succeeded. | 6 |
livenessProbe.successThreshold | Minimum consecutive successes for the probe to be considered successful after having failed | 1 |
readinessProbe.enabled | would you like a readinessProbe to be enabled | true |
readinessProbe.initialDelaySeconds | Delay before liveness probe is initiated | 5 |
readinessProbe.periodSeconds | How often to perform the probe | 10 |
readinessProbe.timeoutSeconds | When the probe times out | 5 |
readinessProbe.failureThreshold | Minimum consecutive failures for the probe to be considered failed after having succeeded. | 6 |
readinessProbe.successThreshold | Minimum consecutive successes for the probe to be considered successful after having failed | 1 |
metrics.kafka.enabled | Whether or not to create a separate Kafka exporter | false |
metrics.kafka.image.registry | Kafka exporter image registry | docker.io |
metrics.kafka.image.repository | Kafka exporter image name | danielqsj/kafka-exporter |
metrics.kafka.image.tag | Kafka exporter image tag | v1.0.1 |
metrics.kafka.image.pullPolicy | Kafka exporter image pull policy | Always |
metrics.kafka.image.pullSecrets | Specify docker-registry secret names as an array | [] (does not add image pull secrets to deployed pods) |
metrics.kafka.interval | Interval that Prometheus scrapes Kafka metrics when using Prometheus Operator | 10s |
metrics.kafka.port | Kafka Exporter Port which exposes metrics in Prometheus format for scraping | 9308 |
metrics.kafka.resources | Allows setting resource limits for kafka-exporter pod | {} |
metrics.jmx.resources | Allows setting resource limits for jmx sidecar container | {} |
metrics.jmx.enabled | Whether or not to expose JMX metrics to Prometheus | false |
metrics.jmx.image.registry | JMX exporter image registry | docker.io |
metrics.jmx.image.repository | JMX exporter image name | solsson/kafka-prometheus-jmx-exporter@sha256 |
metrics.jmx.image.tag | JMX exporter image tag | a23062396cd5af1acdf76512632c20ea6be76885dfc20cd9ff40fb23846557e8 |
metrics.jmx.image.pullPolicy | JMX exporter image pull policy | Always |
metrics.jmx.image.pullSecrets | Specify docker-registry secret names as an array | [] (does not add image pull secrets to deployed pods) |
metrics.jmx.interval | Interval that Prometheus scrapes JMX metrics when using Prometheus Operator | 10s |
metrics.jmx.exporterPort | JMX Exporter Port which exposes metrics in Prometheus format for scraping | 5556 |
metrics.jmx.configMap.enabled | Enable the default ConfigMap for JMX | true |
metrics.jmx.configMap.overrideConfig | Allows config file to be generated by passing values to ConfigMap | {} |
metrics.jmx.configMap.overrideName | Allows setting the name of the ConfigMap to be used | "" |
metrics.jmx.jmxPort | The jmx port which JMX style metrics are exposed (note: these are not scrapeable by Prometheus) | 5555 |
metrics.jmx.whitelistObjectNames | Allows setting which JMX objects you want to expose to via JMX stats to JMX Exporter | (see values.yaml ) |
zookeeper.enabled | Switch to enable or disable the Zookeeper helm chart | true |
externalZookeeper.servers | Server or list of external zookeeper servers to use. | nil |
Specify each parameter using the --set key=value[,key=value]
argument to helm install
. For example,
$ helm install --name my-release \
--set kafkaPassword=secretpassword,kafkaDatabase=my-database \
bitnami/kafka
The above command sets the Kafka kafka
account password to secretpassword
. Additionally it creates a database named my-database
.
Alternatively, a YAML file that specifies the values for the parameters can be provided while installing the chart. For example,
$ helm install --name my-release -f values.yaml bitnami/kafka
Tip: You can use the default values.yaml
Production and horizontal scaling
The following repo contains the recommended production settings for Kafka server in an alternative values file. Please read carefully the comments in the values-production.yaml file to set up your environment
To horizontally scale this chart, first download the values-production.yaml file to your local folder, then:
$ helm install --name my-release -f ./values-production.yaml bitnami/kafka
$ kubectl scale statefulset my-kafka-slave --replicas=3
Enable security for Kafka and Zookeeper
If you enabled the authentication for Kafka, the SASL_SSL listener will be configured with your provided inputs. In particular you can set the following pair of credentials:
- brokerUser/brokerPassword: To authenticate kafka clients against kafka brokers
- interBrokerUser/interBrokerPassword: To authenticate kafka brokers between them.
- zookeeperUser/zookeeperPassword: In the case that the Zookeeper chart is deployed with SASL authentication enabled.
In order to configure the authentication, you must create a secret containing the kafka.keystore.jks and kafka.trustore.jks certificates and pass the secret name with the --auth.certificatesSecret
option when deploying the chart.
You can create the secret with this command assuming you have your certificates in your working directory:
kubectl create secret generic kafka-certificates --from-file=./kafka.keystore.jks --from-file=./kafka.truststore.jks
As an example of Kafka installed with authentication you can use this command:
helm install --name my-release bitnami/kafka --set auth.enabled=true \
--set auth.brokerUser=brokerUser --set auth.brokerPassword=brokerPassword \
--set auth.interBrokerUser=interBrokerUser --set auth.interBrokerPassword=interBrokerPassword \
--set auth.zookeeperUser=zookeeperUser --set auth.zookeeperPassword=zookeeperPassword \
--set zookeeper.auth.enabled=-true --set zookeeper.auth.serverUser=zookeeperUser --set zookeeper.auth.serverPassword=zookeeperPassword \
--set zookeeper.auth.clientUser=zookeeperUser --set zookeeper.auth.clientPassword=zookeeperPassword \
--set auth.certificatesSecret=kafka-certificates
Note: If the JKS files are password protected (recommended), you will need to provide the password to get access to the keystores. To do so, use the
--auth.certificatesPassword
option to provide your password.
Persistence
The Bitnami Kafka image stores the Kafka data at the /bitnami/kafka
path of the container.
Persistent Volume Claims are used to keep the data across deployments. This is known to work in GCE, AWS, and minikube. See the Configuration section to configure the PVC or to disable persistence.
Upgrading
To 1.0.0
Backwards compatibility is not guaranteed unless you modify the labels used on the chart's deployments. Use the workaround below to upgrade from versions previous to 1.0.0. The following example assumes that the release name is kafka:
$ kubectl delete statefulset kafka-kafka --cascade=false
$ kubectl delete statefulset kafka-zookeeper --cascade=false
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