DolphinScheduler/dockerfile

What is Dolphin Scheduler?

Dolphin Scheduler 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.

Github URL: https://github.com/apache/incubator-dolphinscheduler

Official Website: https://dolphinscheduler.apache.org

How to use this docker image

You can start a dolphinscheduler instance

$ docker run -dit --name dolphinscheduler \ 
-e POSTGRESQL_USERNAME=test -e POSTGRESQL_PASSWORD=test \
-p 8888:8888 \
dolphinscheduler all

The default postgres user root, postgres password root and database dolphinscheduler are created in the startup.sh.

The default zookeeper is created in the startup.sh.

Or via Environment Variables POSTGRESQL_HOST POSTGRESQL_PORT ZOOKEEPER_QUORUM

You can specify existing postgres service. Example:

$ docker run -dit --name dolphinscheduler \
-e POSTGRESQL_HOST="192.168.x.x" -e POSTGRESQL_PORT="5432" \
-e POSTGRESQL_USERNAME="test" -e POSTGRESQL_PASSWORD="test" \
-p 8888:8888 \
dolphinscheduler all

You can specify existing zookeeper service. Example:

$ docker run -dit --name dolphinscheduler \
-e ZOOKEEPER_QUORUM="l92.168.x.x:2181"
-e POSTGRESQL_USERNAME="test" -e POSTGRESQL_PASSWORD="test" \
-p 8888:8888 \
dolphinscheduler all

Or start a standalone dolphinscheduler server

You can start a standalone dolphinscheduler server.

• Start a master server, For example:

$ docker run -dit --name dolphinscheduler \
-e ZOOKEEPER_QUORUM="l92.168.x.x:2181"
-e POSTGRESQL_HOST="192.168.x.x" -e POSTGRESQL_PORT="5432" \
-e POSTGRESQL_USERNAME="test" -e POSTGRESQL_PASSWORD="test" \
dolphinscheduler master-server

• Start a worker server, For example:

$ docker run -dit --name dolphinscheduler \
-e ZOOKEEPER_QUORUM="l92.168.x.x:2181"
-e POSTGRESQL_HOST="192.168.x.x" -e POSTGRESQL_PORT="5432" \
-e POSTGRESQL_USERNAME="test" -e POSTGRESQL_PASSWORD="test" \
dolphinscheduler worker-server

• Start a api server, For example:

$ docker run -dit --name dolphinscheduler \
-e POSTGRESQL_HOST="192.168.x.x" -e POSTGRESQL_PORT="5432" \
-e POSTGRESQL_USERNAME="test" -e POSTGRESQL_PASSWORD="test" \
-p 12345:12345 \
dolphinscheduler api-server

• Start a alert server, For example:

$ docker run -dit --name dolphinscheduler \
-e POSTGRESQL_HOST="192.168.x.x" -e POSTGRESQL_PORT="5432" \
-e POSTGRESQL_USERNAME="test" -e POSTGRESQL_PASSWORD="test" \
dolphinscheduler alert-server

• Start a frontend, For example:

$ docker run -dit --name dolphinscheduler \
-e FRONTEND_API_SERVER_HOST="192.168.x.x" -e FRONTEND_API_SERVER_PORT="12345" \
-p 8888:8888 \
dolphinscheduler frontend

Note: You must be specify POSTGRESQL_HOST POSTGRESQL_PORT ZOOKEEPER_QUORUM when start a standalone dolphinscheduler server.

How to build a docker image

You can build a docker image in A Unix-like operating system, You can also build it in Windows operating system.

In Unix-Like, Example:

$ cd path/incubator-dolphinscheduler
$ sh ./dockerfile/hooks/build

In Windows, Example:

c:\incubator-dolphinscheduler>.\dockerfile\hooks\build.bat

Please read ./dockerfile/hooks/build ./dockerfile/hooks/build.bat script files if you don't understand

Environment Variables

The Dolphin Scheduler image uses several environment variables which are easy to miss. While none of the variables are required, they may significantly aid you in using the image.

POSTGRESQL_HOST

This environment variable sets the host for PostgreSQL. The default value is 127.0.0.1.

Note: You must be specify it when start a standalone dolphinscheduler server. Like master-server, worker-server, api-server, alert-server.

POSTGRESQL_PORT

This environment variable sets the port for PostgreSQL. The default value is 5432.

Note: You must be specify it when start a standalone dolphinscheduler server. Like master-server, worker-server, api-server, alert-server.

POSTGRESQL_USERNAME

This environment variable sets the username for PostgreSQL. The default value is root.

POSTGRESQL_PASSWORD

This environment variable sets the password for PostgreSQL. The default value is root.

DOLPHINSCHEDULER_ENV_PATH

This environment variable sets the runtime environment for task. The default value is /opt/dolphinscheduler/conf/env/dolphinscheduler_env.sh.

TASK_QUEUE

This environment variable sets the task queue for master-server and worker-serverr. The default value is zookeeper.

ZOOKEEPER_QUORUM

This environment variable sets zookeeper quorum for master-server and worker-serverr. The default value is 127.0.0.1:2181.

Note: You must be specify it when start a standalone dolphinscheduler server. Like master-server, worker-server.

MASTER_EXEC_THREADS

This environment variable sets exec thread num for master-server. The default value is 100.

MASTER_EXEC_TASK_NUM

This environment variable sets exec task num for master-server. The default value is 20.

MASTER_HEARTBEAT_INTERVAL

This environment variable sets heartbeat interval for master-server. The default value is 10.

MASTER_TASK_COMMIT_RETRYTIMES

This environment variable sets task commit retry times for master-server. The default value is 5.

MASTER_TASK_COMMIT_INTERVAL

This environment variable sets task commit interval for master-server. The default value is 1000.

MASTER_MAX_CPULOAD_AVG

This environment variable sets max cpu load avg for master-server. The default value is 100.

MASTER_RESERVED_MEMORY

This environment variable sets reserved memory for master-server. The default value is 0.1.

WORKER_EXEC_THREADS

This environment variable sets exec thread num for worker-server. The default value is 100.

WORKER_HEARTBEAT_INTERVAL

This environment variable sets heartbeat interval for worker-server. The default value is 10.

WORKER_FETCH_TASK_NUM

This environment variable sets fetch task num for worker-server. The default value is 3.

WORKER_MAX_CPULOAD_AVG

This environment variable sets max cpu load avg for worker-server. The default value is 100.

WORKER_RESERVED_MEMORY

This environment variable sets reserved memory for worker-server. The default value is 0.1.

XLS_FILE_PATH

This environment variable sets xls file path for alert-server. The default value is /tmp/xls.

MAIL_SERVER_HOST

This environment variable sets mail server host for alert-server. The default value is empty.

MAIL_SERVER_PORT

This environment variable sets mail server port for alert-server. The default value is empty.

MAIL_SENDER

This environment variable sets mail sender for alert-server. The default value is empty.

MAIL_USER=

This environment variable sets mail user for alert-server. The default value is empty.

MAIL_PASSWD

This environment variable sets mail password for alert-server. The default value is empty.

MAIL_SMTP_STARTTLS_ENABLE

This environment variable sets SMTP tls for alert-server. The default value is true.

MAIL_SMTP_SSL_ENABLE

This environment variable sets SMTP ssl for alert-server. The default value is false.

MAIL_SMTP_SSL_TRUST

This environment variable sets SMTP ssl truest for alert-server. The default value is empty.

ENTERPRISE_WECHAT_ENABLE

This environment variable sets enterprise wechat enable for alert-server. The default value is false.

ENTERPRISE_WECHAT_CORP_ID

This environment variable sets enterprise wechat corp id for alert-server. The default value is empty.

ENTERPRISE_WECHAT_SECRET

This environment variable sets enterprise wechat secret for alert-server. The default value is empty.

ENTERPRISE_WECHAT_AGENT_ID

This environment variable sets enterprise wechat agent id for alert-server. The default value is empty.

ENTERPRISE_WECHAT_USERS

This environment variable sets enterprise wechat users for alert-server. The default value is empty.

FRONTEND_API_SERVER_HOST

This environment variable sets api server host for frontend. The default value is 127.0.0.1.

Note: You must be specify it when start a standalone dolphinscheduler server. Like api-server.

FRONTEND_API_SERVER_PORT

This environment variable sets api server port for frontend. The default value is 123451.

Note: You must be specify it when start a standalone dolphinscheduler server. Like api-server.

Initialization scripts

If you would like to do additional initialization in an image derived from this one, add one or more environment variable under /root/start-init-conf.sh, and modify template files in /opt/dolphinscheduler/conf/*.tpl.

For example, to add an environment variable API_SERVER_PORT in /root/start-init-conf.sh:

export API_SERVER_PORT=5555

and to modify /opt/dolphinscheduler/conf/application-api.properties.tpl template file, add server port:

server.port=${API_SERVER_PORT}

/root/start-init-conf.sh will dynamically generate config file:

echo "generate app config"
ls ${DOLPHINSCHEDULER_HOME}/conf/ | grep ".tpl" | while read line; do
eval "cat << EOF
$(cat ${DOLPHINSCHEDULER_HOME}/conf/${line})
EOF
" > ${DOLPHINSCHEDULER_HOME}/conf/${line%.*}
done

echo "generate nginx config"
sed -i "s/FRONTEND_API_SERVER_HOST/${FRONTEND_API_SERVER_HOST}/g" /etc/nginx/conf.d/dolphinscheduler.conf
sed -i "s/FRONTEND_API_SERVER_PORT/${FRONTEND_API_SERVER_PORT}/g" /etc/nginx/conf.d/dolphinscheduler.conf