To interact with Zeebe in the cloud from the outside, every client application must authenticate itself. An OAuth Flow is therefore used for authentication:
The application authenticates itself with OAuth service using
Client Id and
Client Secret, OAuth service validates this information and returns an access token, and the application can then use this access token to interact with Zeebe in the cloud.
The client configuration is shown at the bottom of the cluster detail view. Create a new client and all necessary information is displayed.
Client Id and
Client Secret, a client application can request an access token at the authentication URL (steps 1 and 2). The access token is necessary to interact with Zeebe in the cloud (step 3).
Access tokens have a validity period that can be found in the access token. After this time, a new access token must be requested.
The OAuth service has a built-in rate limit. If too many token requests are executed in a short time, the client is blocked for a certain time. Since the access tokens have a certain validity period, they must be cached on the client side.
The officially offered client libraries (as well as the Node.js client) have already integrated with the auth routine, handle obtaining and refreshing an access token, and make use of a local cache.
Create a client
To create a client, take the following steps:
- Navigate into the API tab.
- Click Create new client to create a new client and name your client accordingly.
Ensure you keep the generated client credentials in a safe place. The client secret will not be shown again. For your convenience, you can also download the client information to your computer.
The downloaded file contains all necessary information to communicate with your Zeebe instance in the future:
ZEEBE_ADDRESS: Address where your cluster can be reached.
ZEEBE_CLIENT_SECRET: Credentials to request a new access token.
ZEEBE_AUTHORIZATION_SERVER_URL: A new token can be requested at this address.
ZEEBE_TOKEN_AUDIENCE: The audience for a Zeebe token request.
CAMUNDA_CLUSTER_ID: The UUID of the cluster.
CAMUNDA_CLUSTER_REGION: The region of the cluster.
CAMUNDA_CREDENTIALS_SCOPES: A comma-separated list of the scopes this credential set is valid for.
CAMUNDA_OAUTH_URL: A new token can be requested at this address using the credentials. Duplicates the earlier Zeebe-focused variable.
Depending on the scopes granted to these client credentials, the following variables may also be present:
CAMUNDA_TASKLIST_BASE_URL: The base URL for the Tasklist API.
CAMUNDA_OPTIMIZE_BASE_URL: The base URL for the Optimize API.
CAMUNDA_OPERATE_BASE_URL: The base URL for the Operate API.