DolphinScheduler/docker/kubernetes/dolphinscheduler/README.md

DolphinScheduler

DolphinScheduler is a distributed and easy-to-expand visual DAG workflow scheduling system, dedicated to solving the complex dependencies in data processing, making the scheduling system out of the box for data processing.

Introduction

This chart bootstraps a DolphinScheduler distributed deployment on a Kubernetes cluster using the Helm package manager.

Prerequisites

• Helm 3.1.0+
• Kubernetes 1.12+
• PV provisioner support in the underlying infrastructure

Installing the Chart

To install the chart with the release name dolphinscheduler:

$ git clone https://github.com/apache/incubator-dolphinscheduler.git
$ cd incubator-dolphinscheduler/docker/kubernetes/dolphinscheduler
$ helm repo add bitnami https://charts.bitnami.com/bitnami
$ helm dependency update .
$ helm install dolphinscheduler .

To install the chart with a namespace named test:

$ helm install dolphinscheduler . -n test

Tip: If a namespace named test is used, the option -n test needs to be added to the helm and kubectl command

These commands deploy DolphinScheduler 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

Access DolphinScheduler UI

If ingress.enabled in values.yaml is set to true, you just access http://${ingress.host}/dolphinscheduler in browser.

Tip: If there is a problem with ingress access, please contact the Kubernetes administrator and refer to the Ingress

Otherwise, you need to execute port-forward command like:

$ kubectl port-forward --address 0.0.0.0 svc/dolphinscheduler-api 12345:12345
$ kubectl port-forward --address 0.0.0.0 -n test svc/dolphinscheduler-api 12345:12345 # with test namespace

Tip: If the error of unable to do port forwarding: socat not found appears, you need to install socat at first

And then access the web: http://192.168.xx.xx:12345/dolphinscheduler

The default username is admin and the default password is dolphinscheduler123

Uninstalling the Chart

To uninstall/delete the dolphinscheduler deployment:

$ helm uninstall dolphinscheduler

The command removes all the Kubernetes components but PVC's associated with the chart and deletes the release.

To delete the PVC's associated with dolphinscheduler:

$ kubectl delete pvc -l app.kubernetes.io/instance=dolphinscheduler

Note: Deleting the PVC's will delete all data as well. Please be cautious before doing it.

Configuration

The Configuration file is values.yaml, and the following tables lists the configurable parameters of the DolphinScheduler chart and their default values.

Parameter	Description	Default
nameOverride	String to partially override common.names.fullname	nil
fullnameOverride	String to fully override common.names.fullname	nil
timezone	World time and date for cities in all time zones	Asia/Shanghai
image.registry	Docker image registry for the DolphinScheduler	docker.io
image.repository	Docker image repository for the DolphinScheduler	dolphinscheduler
image.tag	Docker image version for the DolphinScheduler	latest
image.pullPolicy	Image pull policy. One of Always, Never, IfNotPresent	IfNotPresent
image.pullSecrets	Image pull secrets. An optional list of references to secrets in the same namespace to use for pulling any of the images	[]
postgresql.enabled	If not exists external PostgreSQL, by default, the DolphinScheduler will use a internal PostgreSQL	true
postgresql.postgresqlUsername	The username for internal PostgreSQL	root
postgresql.postgresqlPassword	The password for internal PostgreSQL	root
postgresql.postgresqlDatabase	The database for internal PostgreSQL	dolphinscheduler
postgresql.persistence.enabled	Set postgresql.persistence.enabled to true to mount a new volume for internal PostgreSQL	false
postgresql.persistence.size	PersistentVolumeClaim Size	20Gi
postgresql.persistence.storageClass	PostgreSQL data Persistent Volume Storage Class. If set to "-", storageClassName: "", which disables dynamic provisioning	-
externalDatabase.type	If exists external PostgreSQL, and set postgresql.enabled value to false. DolphinScheduler's database type will use it	postgresql
externalDatabase.driver	If exists external PostgreSQL, and set postgresql.enabled value to false. DolphinScheduler's database driver will use it	org.postgresql.Driver
externalDatabase.host	If exists external PostgreSQL, and set postgresql.enabled value to false. DolphinScheduler's database host will use it	localhost
externalDatabase.port	If exists external PostgreSQL, and set postgresql.enabled value to false. DolphinScheduler's database port will use it	5432
externalDatabase.username	If exists external PostgreSQL, and set postgresql.enabled value to false. DolphinScheduler's database username will use it	root
externalDatabase.password	If exists external PostgreSQL, and set postgresql.enabled value to false. DolphinScheduler's database password will use it	root
externalDatabase.database	If exists external PostgreSQL, and set postgresql.enabled value to false. DolphinScheduler's database database will use it	dolphinscheduler
externalDatabase.params	If exists external PostgreSQL, and set postgresql.enabled value to false. DolphinScheduler's database params will use it	characterEncoding=utf8
zookeeper.enabled	If not exists external Zookeeper, by default, the DolphinScheduler will use a internal Zookeeper	true
zookeeper.fourlwCommandsWhitelist	A list of comma separated Four Letter Words commands to use	srvr,ruok,wchs,cons
zookeeper.service.port	ZooKeeper port	2181
zookeeper.persistence.enabled	Set zookeeper.persistence.enabled to true to mount a new volume for internal Zookeeper	false
zookeeper.persistence.size	PersistentVolumeClaim Size	20Gi
zookeeper.persistence.storageClass	Zookeeper data Persistent Volume Storage Class. If set to "-", storageClassName: "", which disables dynamic provisioning	-
zookeeper.zookeeperRoot	Specify dolphinscheduler root directory in Zookeeper	/dolphinscheduler
externalZookeeper.zookeeperQuorum	If exists external Zookeeper, and set zookeeper.enabled value to false. Specify Zookeeper quorum	127.0.0.1:2181
externalZookeeper.zookeeperRoot	If exists external Zookeeper, and set zookeeper.enabled value to false. Specify dolphinscheduler root directory in Zookeeper	/dolphinscheduler
common.configmap.DOLPHINSCHEDULER_ENV	System env path, self configuration, please read values.yaml	[]
common.configmap.DOLPHINSCHEDULER_DATA_BASEDIR_PATH	User data directory path, self configuration, please make sure the directory exists and have read write permissions	/tmp/dolphinscheduler
common.configmap.RESOURCE_STORAGE_TYPE	Resource storage type: HDFS, S3, NONE	HDFS
common.configmap.RESOURCE_UPLOAD_PATH	Resource store on HDFS/S3 path, please make sure the directory exists on hdfs and have read write permissions	/dolphinscheduler
common.configmap.FS_DEFAULT_FS	Resource storage file system like file:///, hdfs://mycluster:8020 or s3a://dolphinscheduler	file:///
common.configmap.FS_S3A_ENDPOINT	S3 endpoint when common.configmap.RESOURCE_STORAGE_TYPE is set to S3	s3.xxx.amazonaws.com
common.configmap.FS_S3A_ACCESS_KEY	S3 access key when common.configmap.RESOURCE_STORAGE_TYPE is set to S3	xxxxxxx
common.configmap.FS_S3A_SECRET_KEY	S3 secret key when common.configmap.RESOURCE_STORAGE_TYPE is set to S3	xxxxxxx
common.fsFileResourcePersistence.enabled	Set common.fsFileResourcePersistence.enabled to true to mount a new file resource volume for api and worker	false
common.fsFileResourcePersistence.accessModes	PersistentVolumeClaim Access Modes, must be ReadWriteMany	[ReadWriteMany]
common.fsFileResourcePersistence.storageClassName	Resource Persistent Volume Storage Class, must support the access mode: ReadWriteMany	-
common.fsFileResourcePersistence.storage	PersistentVolumeClaim Size	20Gi
master.podManagementPolicy	PodManagementPolicy controls how pods are created during initial scale up, when replacing pods on nodes, or when scaling down	Parallel
master.replicas	Replicas is the desired number of replicas of the given Template	3
master.annotations	The annotations for master server	{}
master.affinity	If specified, the pod's scheduling constraints	{}
master.nodeSelector	NodeSelector is a selector which must be true for the pod to fit on a node	{}
master.tolerations	If specified, the pod's tolerations	{}
master.resources	The resource limit and request config for master server	{}
master.configmap.DOLPHINSCHEDULER_OPTS	The java options for master server	""
master.configmap.MASTER_EXEC_THREADS	Master execute thread num	100
master.configmap.MASTER_EXEC_TASK_NUM	Master execute task number in parallel	20
master.configmap.MASTER_HEARTBEAT_INTERVAL	Master heartbeat interval	10
master.configmap.MASTER_TASK_COMMIT_RETRYTIMES	Master commit task retry times	5
master.configmap.MASTER_TASK_COMMIT_INTERVAL	Master commit task interval	1000
master.configmap.MASTER_MAX_CPULOAD_AVG	Only less than cpu avg load, master server can work. default value : the number of cpu cores * 2	100
master.configmap.MASTER_RESERVED_MEMORY	Only larger than reserved memory, master server can work. default value : physical memory * 1/10, unit is G	0.1
master.configmap.MASTER_LISTEN_PORT	Master listen port	5678
master.livenessProbe.enabled	Turn on and off liveness probe	true
master.livenessProbe.initialDelaySeconds	Delay before liveness probe is initiated	30
master.livenessProbe.periodSeconds	How often to perform the probe	30
master.livenessProbe.timeoutSeconds	When the probe times out	5
master.livenessProbe.failureThreshold	Minimum consecutive successes for the probe	3
master.livenessProbe.successThreshold	Minimum consecutive failures for the probe	1
master.readinessProbe.enabled	Turn on and off readiness probe	true
master.readinessProbe.initialDelaySeconds	Delay before readiness probe is initiated	30
master.readinessProbe.periodSeconds	How often to perform the probe	30
master.readinessProbe.timeoutSeconds	When the probe times out	5
master.readinessProbe.failureThreshold	Minimum consecutive successes for the probe	3
master.readinessProbe.successThreshold	Minimum consecutive failures for the probe	1
master.persistentVolumeClaim.enabled	Set master.persistentVolumeClaim.enabled to true to mount a new volume for master	false
master.persistentVolumeClaim.accessModes	PersistentVolumeClaim Access Modes	[ReadWriteOnce]
master.persistentVolumeClaim.storageClassName	Master logs data Persistent Volume Storage Class. If set to "-", storageClassName: "", which disables dynamic provisioning	-
master.persistentVolumeClaim.storage	PersistentVolumeClaim Size	20Gi
worker.podManagementPolicy	PodManagementPolicy controls how pods are created during initial scale up, when replacing pods on nodes, or when scaling down	Parallel
worker.replicas	Replicas is the desired number of replicas of the given Template	3
worker.annotations	The annotations for worker server	{}
worker.affinity	If specified, the pod's scheduling constraints	{}
worker.nodeSelector	NodeSelector is a selector which must be true for the pod to fit on a node	{}
worker.tolerations	If specified, the pod's tolerations	{}
worker.resources	The resource limit and request config for worker server	{}
worker.configmap.DOLPHINSCHEDULER_OPTS	The java options for worker server	""
worker.configmap.WORKER_EXEC_THREADS	Worker execute thread num	100
worker.configmap.WORKER_HEARTBEAT_INTERVAL	Worker heartbeat interval	10
worker.configmap.WORKER_MAX_CPULOAD_AVG	Only less than cpu avg load, worker server can work. default value : the number of cpu cores * 2	100
worker.configmap.WORKER_RESERVED_MEMORY	Only larger than reserved memory, worker server can work. default value : physical memory * 1/10, unit is G	0.1
worker.configmap.WORKER_LISTEN_PORT	Worker listen port	1234
worker.configmap.WORKER_GROUPS	Worker groups	default
worker.configmap.WORKER_WEIGHT	Worker weight	100
worker.livenessProbe.enabled	Turn on and off liveness probe	true
worker.livenessProbe.initialDelaySeconds	Delay before liveness probe is initiated	30
worker.livenessProbe.periodSeconds	How often to perform the probe	30
worker.livenessProbe.timeoutSeconds	When the probe times out	5
worker.livenessProbe.failureThreshold	Minimum consecutive successes for the probe	3
worker.livenessProbe.successThreshold	Minimum consecutive failures for the probe	1
worker.readinessProbe.enabled	Turn on and off readiness probe	true
worker.readinessProbe.initialDelaySeconds	Delay before readiness probe is initiated	30
worker.readinessProbe.periodSeconds	How often to perform the probe	30
worker.readinessProbe.timeoutSeconds	When the probe times out	5
worker.readinessProbe.failureThreshold	Minimum consecutive successes for the probe	3
worker.readinessProbe.successThreshold	Minimum consecutive failures for the probe	1
worker.persistentVolumeClaim.enabled	Set worker.persistentVolumeClaim.enabled to true to enable persistentVolumeClaim for worker	false
worker.persistentVolumeClaim.dataPersistentVolume.enabled	Set worker.persistentVolumeClaim.dataPersistentVolume.enabled to true to mount a data volume for worker	false
worker.persistentVolumeClaim.dataPersistentVolume.accessModes	PersistentVolumeClaim Access Modes	[ReadWriteOnce]
worker.persistentVolumeClaim.dataPersistentVolume.storageClassName	Worker data Persistent Volume Storage Class. If set to "-", storageClassName: "", which disables dynamic provisioning	-
worker.persistentVolumeClaim.dataPersistentVolume.storage	PersistentVolumeClaim Size	20Gi
worker.persistentVolumeClaim.logsPersistentVolume.enabled	Set worker.persistentVolumeClaim.logsPersistentVolume.enabled to true to mount a logs volume for worker	false
worker.persistentVolumeClaim.logsPersistentVolume.accessModes	PersistentVolumeClaim Access Modes	[ReadWriteOnce]
worker.persistentVolumeClaim.logsPersistentVolume.storageClassName	Worker logs data Persistent Volume Storage Class. If set to "-", storageClassName: "", which disables dynamic provisioning	-
worker.persistentVolumeClaim.logsPersistentVolume.storage	PersistentVolumeClaim Size	20Gi
alert.replicas	Replicas is the desired number of replicas of the given Template	1
alert.strategy.type	Type of deployment. Can be "Recreate" or "RollingUpdate"	RollingUpdate
alert.strategy.rollingUpdate.maxSurge	The maximum number of pods that can be scheduled above the desired number of pods	25%
alert.strategy.rollingUpdate.maxUnavailable	The maximum number of pods that can be unavailable during the update	25%
alert.annotations	The annotations for alert server	{}
alert.affinity	If specified, the pod's scheduling constraints	{}
alert.nodeSelector	NodeSelector is a selector which must be true for the pod to fit on a node	{}
alert.tolerations	If specified, the pod's tolerations	{}
alert.resources	The resource limit and request config for alert server	{}
alert.configmap.DOLPHINSCHEDULER_OPTS	The java options for alert server	""
alert.configmap.ALERT_PLUGIN_DIR	Alert plugin directory	lib/plugin/alert
alert.livenessProbe.enabled	Turn on and off liveness probe	true
alert.livenessProbe.initialDelaySeconds	Delay before liveness probe is initiated	30
alert.livenessProbe.periodSeconds	How often to perform the probe	30
alert.livenessProbe.timeoutSeconds	When the probe times out	5
alert.livenessProbe.failureThreshold	Minimum consecutive successes for the probe	3
alert.livenessProbe.successThreshold	Minimum consecutive failures for the probe	1
alert.readinessProbe.enabled	Turn on and off readiness probe	true
alert.readinessProbe.initialDelaySeconds	Delay before readiness probe is initiated	30
alert.readinessProbe.periodSeconds	How often to perform the probe	30
alert.readinessProbe.timeoutSeconds	When the probe times out	5
alert.readinessProbe.failureThreshold	Minimum consecutive successes for the probe	3
alert.readinessProbe.successThreshold	Minimum consecutive failures for the probe	1
alert.persistentVolumeClaim.enabled	Set alert.persistentVolumeClaim.enabled to true to mount a new volume for alert	false
alert.persistentVolumeClaim.accessModes	PersistentVolumeClaim Access Modes	[ReadWriteOnce]
alert.persistentVolumeClaim.storageClassName	Alert logs data Persistent Volume Storage Class. If set to "-", storageClassName: "", which disables dynamic provisioning	-
alert.persistentVolumeClaim.storage	PersistentVolumeClaim Size	20Gi
api.replicas	Replicas is the desired number of replicas of the given Template	1
api.strategy.type	Type of deployment. Can be "Recreate" or "RollingUpdate"	RollingUpdate
api.strategy.rollingUpdate.maxSurge	The maximum number of pods that can be scheduled above the desired number of pods	25%
api.strategy.rollingUpdate.maxUnavailable	The maximum number of pods that can be unavailable during the update	25%
api.annotations	The annotations for api server	{}
api.affinity	If specified, the pod's scheduling constraints	{}
api.nodeSelector	NodeSelector is a selector which must be true for the pod to fit on a node	{}
api.tolerations	If specified, the pod's tolerations	{}
api.resources	The resource limit and request config for api server	{}
api.configmap.DOLPHINSCHEDULER_OPTS	The java options for api server	""
api.livenessProbe.enabled	Turn on and off liveness probe	true
api.livenessProbe.initialDelaySeconds	Delay before liveness probe is initiated	30
api.livenessProbe.periodSeconds	How often to perform the probe	30
api.livenessProbe.timeoutSeconds	When the probe times out	5
api.livenessProbe.failureThreshold	Minimum consecutive successes for the probe	3
api.livenessProbe.successThreshold	Minimum consecutive failures for the probe	1
api.readinessProbe.enabled	Turn on and off readiness probe	true
api.readinessProbe.initialDelaySeconds	Delay before readiness probe is initiated	30
api.readinessProbe.periodSeconds	How often to perform the probe	30
api.readinessProbe.timeoutSeconds	When the probe times out	5
api.readinessProbe.failureThreshold	Minimum consecutive successes for the probe	3
api.readinessProbe.successThreshold	Minimum consecutive failures for the probe	1
api.persistentVolumeClaim.enabled	Set api.persistentVolumeClaim.enabled to true to mount a new volume for api	false
api.persistentVolumeClaim.accessModes	PersistentVolumeClaim Access Modes	[ReadWriteOnce]
api.persistentVolumeClaim.storageClassName	api logs data Persistent Volume Storage Class. If set to "-", storageClassName: "", which disables dynamic provisioning	-
api.persistentVolumeClaim.storage	PersistentVolumeClaim Size	20Gi
ingress.enabled	Enable ingress	false
ingress.host	Ingress host	dolphinscheduler.org
ingress.path	Ingress path	/
ingress.tls.enabled	Enable ingress tls	false
ingress.tls.hosts	Ingress tls hosts	dolphinscheduler.org
ingress.tls.secretName	Ingress tls secret name	dolphinscheduler-tls

FAQ

How to use MySQL as the DolphinScheduler's database instead of PostgreSQL?

Because of the commercial license, we cannot directly use the driver and client of MySQL.

If you want to use MySQL, you can build a new image based on the apache/dolphinscheduler image as follows.

1. Download the MySQL driver mysql-connector-java-5.1.49.jar (require >=5.1.47)

2. Create a new Dockerfile to add MySQL driver and client:

FROM apache/dolphinscheduler:latest
COPY mysql-connector-java-5.1.49.jar /opt/dolphinscheduler/lib
RUN apk add --update --no-cache mysql-client

3. Build a new docker image including MySQL driver and client:

docker build -t apache/dolphinscheduler:mysql .

4. Push the docker image apache/dolphinscheduler:mysql to a docker registry

5. Modify image registry and repository, and update tag to mysql in values.yaml

6. Modify postgresql enabled to false

7. Modify externalDatabase (especially modify host, username and password):

externalDatabase:
  type: "mysql"
  driver: "com.mysql.jdbc.Driver"
  host: "localhost"
  port: "3306"
  username: "root"
  password: "root"
  database: "dolphinscheduler"
  params: "useUnicode=true&characterEncoding=UTF-8"

8. Run a DolphinScheduler release in Kubernetes (See Installing the Chart)

How to support MySQL datasource in Datasource manage?

Because of the commercial license, we cannot directly use the driver of MySQL.

If you want to add MySQL datasource, you can build a new image based on the apache/dolphinscheduler image as follows.

1. Download the MySQL driver mysql-connector-java-5.1.49.jar (require >=5.1.47)

2. Create a new Dockerfile to add MySQL driver:

FROM apache/dolphinscheduler:latest
COPY mysql-connector-java-5.1.49.jar /opt/dolphinscheduler/lib

3. Build a new docker image including MySQL driver:

docker build -t apache/dolphinscheduler:mysql-driver .

4. Push the docker image apache/dolphinscheduler:mysql-driver to a docker registry

5. Modify image registry and repository, and update tag to mysql-driver in values.yaml

6. Run a DolphinScheduler release in Kubernetes (See Installing the Chart)

7. Add a MySQL datasource in Datasource manage

How to support Oracle datasource in Datasource manage?

Because of the commercial license, we cannot directly use the driver of Oracle.

If you want to add Oracle datasource, you can build a new image based on the apache/dolphinscheduler image as follows.

1. Download the Oracle driver ojdbc8.jar (such as ojdbc8-19.9.0.0.jar)

2. Create a new Dockerfile to add Oracle driver:

FROM apache/dolphinscheduler:latest
COPY ojdbc8-19.9.0.0.jar /opt/dolphinscheduler/lib

3. Build a new docker image including Oracle driver:

docker build -t apache/dolphinscheduler:oracle-driver .

4. Push the docker image apache/dolphinscheduler:oracle-driver to a docker registry

5. Modify image registry and repository, and update tag to oracle-driver in values.yaml

6. Run a DolphinScheduler release in Kubernetes (See Installing the Chart)

7. Add a Oracle datasource in Datasource manage

For more information please refer to the incubator-dolphinscheduler documentation.