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# Dolphin Scheduler
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# DolphinScheduler
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[Dolphin Scheduler](https://dolphinscheduler.apache.org) 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.
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[DolphinScheduler](https://dolphinscheduler.apache.org) 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.
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## Introduction
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This chart bootstraps a [Dolphin Scheduler](https://dolphinscheduler.apache.org) distributed deployment on a [Kubernetes](http://kubernetes.io) cluster using the [Helm](https://helm.sh) package manager.
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This chart bootstraps a [DolphinScheduler](https://dolphinscheduler.apache.org) distributed deployment on a [Kubernetes](http://kubernetes.io) cluster using the [Helm](https://helm.sh) package manager.
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## Prerequisites
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@ -22,7 +22,7 @@ $ helm repo add bitnami https://charts.bitnami.com/bitnami
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$ helm dependency update .
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$ helm install dolphinscheduler .
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```
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These commands deploy Dolphin Scheduler on the Kubernetes cluster in the default configuration. The [configuration](#configuration) section lists the parameters that can be configured during installation.
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These commands deploy DolphinScheduler on the Kubernetes cluster in the default configuration. The [configuration](#configuration) section lists the parameters that can be configured during installation.
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> **Tip**: List all releases using `helm list`
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@ -67,7 +67,7 @@ The following tables lists the configurable parameters of the Dolphins Scheduler
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| `externalDatabase.database` | If exists external PostgreSQL, and set `postgresql.enabled` value to false. Dolphins Scheduler's database database will use it | `dolphinscheduler` |
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| `externalDatabase.params` | If exists external PostgreSQL, and set `postgresql.enabled` value to false. Dolphins Scheduler's database params will use it | `characterEncoding=utf8` |
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| | | |
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| `zookeeper.enabled` | If not exists external Zookeeper, by default, the Dolphin Scheduler will use a internal Zookeeper | `true` |
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| `zookeeper.enabled` | If not exists external Zookeeper, by default, the DolphinScheduler will use a internal Zookeeper | `true` |
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| `zookeeper.fourlwCommandsWhitelist` | A list of comma separated Four Letter Words commands to use | `srvr,ruok,wchs,cons` |
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| `zookeeper.service.port` | ZooKeeper port | `2181` |
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| `zookeeper.persistence.enabled` | Set `zookeeper.persistence.enabled` to `true` to mount a new volume for internal Zookeeper | `false` |
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@ -222,4 +222,108 @@ The following tables lists the configurable parameters of the Dolphins Scheduler
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| `ingress.tls.hosts` | Ingress tls hosts | `dolphinscheduler.org` |
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| `ingress.tls.secretName` | Ingress tls secret name | `dolphinscheduler-tls` |
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For more information please refer to the [chart](https://github.com/apache/incubator-dolphinscheduler.git) documentation.
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## FAQ
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### How to use MySQL as the DolphinScheduler's database instead of PostgreSQL?
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> Because of the commercial license, we cannot directly use the driver and client of MySQL.
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>
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> If you want to use MySQL, you can build a new image based on the `apache/dolphinscheduler` image as follows.
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1. Download the MySQL driver [mysql-connector-java-5.1.49.jar](https://repo1.maven.org/maven2/mysql/mysql-connector-java/5.1.49/mysql-connector-java-5.1.49.jar) (require `>=5.1.47`)
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2. Create a new `Dockerfile` to add MySQL driver and client:
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```
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FROM apache/dolphinscheduler:latest
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COPY mysql-connector-java-5.1.49.jar /opt/dolphinscheduler/lib
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RUN apk add --update --no-cache mysql-client
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```
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3. Build a new docker image including MySQL driver and client:
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```
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docker build -t apache/dolphinscheduler:mysql .
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```
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4. Push the docker image `apache/dolphinscheduler:mysql` to a docker registry
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5. Modify image `registry` and `repository`, and update `tag` to `mysql` in `values.yaml`
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6. Modify postgresql `enabled` to `false`
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7. Modify externalDatabase (especially modify `host`, `username` and `password`):
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```
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externalDatabase:
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type: "mysql"
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driver: "com.mysql.jdbc.Driver"
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host: "localhost"
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port: "3306"
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username: "root"
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password: "root"
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database: "dolphinscheduler"
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params: "useUnicode=true&characterEncoding=UTF-8"
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```
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8. Run a DolphinScheduler release in Kubernetes (See **Installing the Chart**)
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### How to support MySQL datasource in `Datasource manage`?
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> Because of the commercial license, we cannot directly use the driver of MySQL.
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>
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> If you want to add MySQL datasource, you can build a new image based on the `apache/dolphinscheduler` image as follows.
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1. Download the MySQL driver [mysql-connector-java-5.1.49.jar](https://repo1.maven.org/maven2/mysql/mysql-connector-java/5.1.49/mysql-connector-java-5.1.49.jar) (require `>=5.1.47`)
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2. Create a new `Dockerfile` to add MySQL driver:
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```
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FROM apache/dolphinscheduler:latest
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COPY mysql-connector-java-5.1.49.jar /opt/dolphinscheduler/lib
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```
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3. Build a new docker image including MySQL driver:
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```
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docker build -t apache/dolphinscheduler:mysql-driver .
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```
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4. Push the docker image `apache/dolphinscheduler:mysql-driver` to a docker registry
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5. Modify image `registry` and `repository`, and update `tag` to `mysql-driver` in `values.yaml`
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6. Run a DolphinScheduler release in Kubernetes (See **Installing the Chart**)
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7. Add a MySQL datasource in `Datasource manage`
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### How to support Oracle datasource in `Datasource manage`?
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> Because of the commercial license, we cannot directly use the driver of Oracle.
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>
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> If you want to add Oracle datasource, you can build a new image based on the `apache/dolphinscheduler` image as follows.
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1. Download the Oracle driver [ojdbc8.jar](https://repo1.maven.org/maven2/com/oracle/database/jdbc/ojdbc8/) (such as `ojdbc8-19.9.0.0.jar`)
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2. Create a new `Dockerfile` to add Oracle driver:
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```
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FROM apache/dolphinscheduler:latest
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COPY ojdbc8-19.9.0.0.jar /opt/dolphinscheduler/lib
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```
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3. Build a new docker image including Oracle driver:
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```
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docker build -t apache/dolphinscheduler:oracle-driver .
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```
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4. Push the docker image `apache/dolphinscheduler:oracle-driver` to a docker registry
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5. Modify image `registry` and `repository`, and update `tag` to `oracle-driver` in `values.yaml`
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6. Run a DolphinScheduler release in Kubernetes (See **Installing the Chart**)
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7. Add a Oracle datasource in `Datasource manage`
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For more information please refer to the [incubator-dolphinscheduler](https://github.com/apache/incubator-dolphinscheduler.git) documentation.
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