#The Pipeline is not automatically triggered

#Problem Description

After creating the Pipeline and Trigger using Pipelines functionality through the UI console, the Pipeline is not automatically triggered even though the event is sent (i.e the code is pushed).

#Root Cause Analysis

There are several possible causes for this issue:

1. The webhook configuration was not set up correctly.
2. The EventListener was not deployed, or is not listening Triggers in the target namespace, or may be filtering out the event.
3. The ServiceAccount used by the EventListener deployment does not have enough permissions.
4. The Trigger is not configured correctly.

#Problem Investigation

Given the possible issues mentioned above, follow the steps to find the root cause of the problem:

#Webhook configuration was not setup correctly

1. Access your repository/settings using an account with appropriate permissions.
2. Check all webhook settings and confirm with the platform administrator details regarding the target address of the webhook.
3. Make sure the required events are enabled by the webhook. For Gitlab events, please refer to GitLab Event Triggers

#EventListener not deployed or setup incorrectly

1. Verify with the Platform Administrator that the EventListener was deployed and can be reached from the event source (i.e Gitlab instance).
2. Access the EventListener resource and check if it is listening Triggers in the target namespace checking the EventListener resource spec, it should have the namespaceSelector field set to * or listing the target namespace.
3. Make sure that interceptors inside EventListener resource are not filtering out the event.
4. Check the EventListener logs for any errors or warnings. This is possible through the kubectl command: kubectl logs <eventlistener-pod-name> -n <namespace>
5. Make sure the ServiceAccount used by the EventListener has appropriate permissions, including create permissions for the PipelineRun resource.

For a detailed documentation on EventListener configuration please see EventListener

#Trigger not configured correctly

1. Verify that the Trigger was configured correctly, making sure the parameters from TriggerBinding or ClusterTriggerBinding match those used in the TriggerTemplate.

For a detailed documentation on how to setup Trigger using Gitlab events as example, please see Gitlab Events