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Host custom Connectors

This guide explains how to host your own Connectors developed with Connector SDK.

Prerequisites​

  • Ensure you have to have a working Camunda cluster in SaaS or Self-Managed.
  • Ensure you have a distribution version of your Connector in the form of "fat" jar file.

For the purpose of this guide, we will be using a generic Connector template as a reference. Clone the repository, and execute mvn clean verify package. This will produce a file called target/connector-template-0.1.0-SNAPSHOT-with-dependencies.jar. In this guide, we will refer this file as connector.jar.

Wiring your Connector with a Camunda cluster​

This approach is equivalent to the hybrid mode, except you don't need to override existing Connectors and instead add a new one. You need to have a running Camunda cluster, and a pair of Client ID/Client Secret with Zeebe and Operate scopes. Learn more about how to obtain required credentials.

Run the following command:

docker run --rm --name=CustomConnectorInSaaS \
    -v $PWD/connector.jar:/opt/app/connector.jar \
    -e ZEEBE_CLIENT_SECURITY_PLAINTEXT=false \
    -e ZEEBE_CLIENT_CLOUD_CLUSTER-ID='<YOUR_CLUSTER_ID>' \
    -e ZEEBE_CLIENT_CLOUD_CLIENT-ID='<YOUR_CLIENT_ID>' \
    -e ZEEBE_CLIENT_CLOUD_CLIENT-SECRET='<YOUR_CLIENT_SECRET>' \
    -e ZEEBE_CLIENT_CLOUD_REGION='<YOUR_CLUSTER_REGION>' \
    -e CAMUNDA_OPERATE_CLIENT_URL='https://<region>.operate.camunda.io/<cluster-id>' \
        camunda/connectors-bundle:<desired-version>

The line -v $PWD/connector.jar:/opt/app/connector.jar binds a volume with your Connector at the path $PWD/connector.jar of you local machine.

Wiring your Connector with Camunda Docker instance (without Keycloak)​

This option is applicable if you launch your cluster in a Self-Managed version with Camunda Platform Docker Compose variant without Keycloak.

Run the following command:

docker run --rm --name=CustomConnectorInSMCore \
    -v $PWD/connector.jar:/opt/app/connector.jar \
    --network=camunda-platform_camunda-platform \
    -e ZEEBE_CLIENT_BROKER_GATEWAY-ADDRESS=zeebe:26500 \
    -e ZEEBE_CLIENT_SECURITY_PLAINTEXT=true \
    -e CAMUNDA_OPERATE_CLIENT_URL=http://operate:8080 \
    -e CAMUNDA_OPERATE_CLIENT_USERNAME=demo \
    -e CAMUNDA_OPERATE_CLIENT_PASSWORD=demo \
        camunda/connectors-bundle:<desired-version>
note

Exact values of the environment variables related to Zeebe, Operate, or network may depend on your own configuration.

Wiring your Connector with Camunda Docker instance (with Keycloak)​

This option is applicable if you launch your cluster in a Self-Managed version with Camunda Platform Docker Compose variant with Keycloak.

Run the following command:

docker run --rm --name=CustomConnectorInSMWithKeyCloak \
    -v $PWD/connector.jar:/opt/app/connector.jar \
    --network=camunda-platform_camunda-platform \
    -e ZEEBE_CLIENT_BROKER_GATEWAY-ADDRESS=zeebe:26500 \
    -e ZEEBE_CLIENT_SECURITY_PLAINTEXT=true \
    -e ZEEBE_CLIENT_ID=<YOUR_ZEEBE_CLIENT_ID> \
    -e ZEEBE_CLIENT_SECRET=<YOUR_ZEEBE_CLIENT_SECRET> \
    -e ZEEBE_TOKEN_AUDIENCE=zeebe-api \
    -e ZEEBE_AUTHORIZATION_SERVER_URL=http://keycloak:8080/auth/realms/camunda-platform/protocol/openid-connect/token \
    -e CAMUNDA_OPERATE_CLIENT_KEYCLOAK-URL=http://keycloak:8080 \
    -e CAMUNDA_OPERATE_CLIENT_CLIENT-ID=connectors \
    -e CAMUNDA_OPERATE_CLIENT_CLIENT-SECRET=<YOUR_OPERATE_CLIENT_SECRET> \
    -e CAMUNDA_OPERATE_CLIENT_KEYCLOAK-REALM=<YOUR_KEYCLOAK_OPERATE_REALM> \
    -e CAMUNDA_OPERATE_CLIENT_URL=http://operate:8080 \
        camunda/connectors-bundle:<desired-version>
note

Exact values of the environment variables related to Zeebe, Operate, Keycloak, or network may depend on your own configuration.

Wiring your Connector with Camunda Helm charts​

There are multiple ways to configure a Helm/Kubernetes Self-Managed cluster. Refer to the official guide to learn more.

For the purpose of this section, imagine you installed Helm charts with helm install dev camunda/camunda-platform, and forwarded Zeebe, Operate, and Keycloak ports:

  • kubectl port-forward svc/dev-zeebe-gateway 26500:26500
  • kubectl port-forward svc/dev-operate 8081:80
  • kubectl port-forward svc/dev-keycloak 18080:80

Now, you need to obtain both Zeebe and Connectors' Operate OAuth clients. You can do it with kubectl get secret dev-zeebe-identity-secret -o jsonpath="{.data.*}" | base64 --decode and kubectl get secret dev-connectors-identity-secret -o jsonpath="{.data.*}" | base64 --decode respectively.

Run the following command:

docker run --rm --name=CustomConnectorInSMWithHelm \
    -v $PWD/connector.jar:/opt/app/connector.jar \
    -e ZEEBE_CLIENT_BROKER_GATEWAY-ADDRESS=host.docker.internal:26500 \
    -e ZEEBE_CLIENT_SECURITY_PLAINTEXT=true \
    -e ZEEBE_CLIENT_ID=zeebe \
    -e ZEEBE_CLIENT_SECRET=<YOUR_ZEEBE_CLIENT_SECRET> \
    -e ZEEBE_TOKEN_AUDIENCE=zeebe-api \
    -e ZEEBE_AUTHORIZATION_SERVER_URL=http://host.docker.internal:18080/auth/realms/camunda-platform/protocol/openid-connect/token \
    -e CAMUNDA_OPERATE_CLIENT_KEYCLOAK-URL=http://host.docker.internal:18080 \
    -e CAMUNDA_OPERATE_CLIENT_CLIENT-ID=connectors \
    -e CAMUNDA_OPERATE_CLIENT_CLIENT-SECRET=<YOUR_OPERATE_CLIENT_SECRET> \
    -e CAMUNDA_OPERATE_CLIENT_KEYCLOAK-REALM=camunda-platform \
    -e CAMUNDA_OPERATE_CLIENT_URL=http://host.docker.internal:8081 \
        camunda/connectors-bundle:<desired-version>
note

Exact values of the environment variables related to Zeebe, Operate, Keycloak, or network may depend on your own configuration.