Creating CI/CD pipelines

Procedure

1. Log in to your OpenShift Container Platform cluster:

   $ oc login -u <login> -p <password> https://openshift.example.com:6443

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2. Create a project for the sample application. For this example workflow, create the pipelines-tutorial project:

   $ oc new-project pipelines-tutorial

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   Note

   If you create a project with a different name, be sure to update the resource URLs used in the example with your project name.

3. View the pipeline service account:

   Red Hat OpenShift Pipelines Operator adds and configures a service account named pipeline that has sufficient permissions to build and push an image. This service account is used by the PipelineRun object.

   $ oc get serviceaccount pipeline

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Procedure

1. Install the apply-manifests and update-deployment task resources from the pipelines-tutorial repository, which contains a list of reusable tasks for pipelines:

   $ oc create -f https://raw.githubusercontent.com/openshift/pipelines-tutorial/pipelines-1.13/01_pipeline/01_apply_manifest_task.yaml
   $ oc create -f https://raw.githubusercontent.com/openshift/pipelines-tutorial/pipelines-1.13/01_pipeline/02_update_deployment_task.yaml

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2. Use the tkn task list command to list the tasks you created:

   $ tkn task list

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   The output verifies that the apply-manifests and update-deployment task resources were created:

   NAME                DESCRIPTION   AGE
   apply-manifests                   1 minute ago
   update-deployment                 48 seconds ago

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3. Use the tkn clustertasks list command to list the Operator-installed additional cluster tasks such as buildah and s2i-python:

   Note

   To use the buildah cluster task in a restricted environment, you must ensure that the Dockerfile uses an internal image stream as the base image.

   $ tkn clustertasks list

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   The output lists the Operator-installed ClusterTask resources:

   NAME                       DESCRIPTION   AGE
   buildah                                  1 day ago
   git-clone                                1 day ago
   s2i-python                               1 day ago
   tkn                                      1 day ago

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Procedure

1. Copy the contents of the following sample pipeline YAML file and save it:

   apiVersion: tekton.dev/v1
   kind: Pipeline
   metadata:
     name: build-and-deploy
   spec:
     workspaces:
     - name: shared-workspace
     params:
     - name: deployment-name
       type: string
       description: name of the deployment to be patched
     - name: git-url
       type: string
       description: url of the git repo for the code of deployment
     - name: git-revision
       type: string
       description: revision to be used from repo of the code for deployment
       default: "pipelines-1.13"
     - name: IMAGE
       type: string
       description: image to be built from the code
     tasks:
     - name: fetch-repository
       taskRef:
         name: git-clone
         kind: ClusterTask
       workspaces:
       - name: output
         workspace: shared-workspace
       params:
       - name: url
         value: $(params.git-url)
       - name: subdirectory
         value: ""
       - name: deleteExisting
         value: "true"
       - name: revision
         value: $(params.git-revision)
     - name: build-image
       taskRef:
         name: buildah
         kind: ClusterTask
       params:
       - name: IMAGE
         value: $(params.IMAGE)
       workspaces:
       - name: source
         workspace: shared-workspace
       runAfter:
       - fetch-repository
     - name: apply-manifests
       taskRef:
         name: apply-manifests
       workspaces:
       - name: source
         workspace: shared-workspace
       runAfter:
       - build-image
     - name: update-deployment
       taskRef:
         name: update-deployment
       params:
       - name: deployment
         value: $(params.deployment-name)
       - name: IMAGE
         value: $(params.IMAGE)
       runAfter:
       - apply-manifests

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   The pipeline definition abstracts away the specifics of the Git source repository and image registries. These details are added as params when a pipeline is triggered and executed.

2. Create the pipeline:

   $ oc create -f <pipeline-yaml-file-name.yaml>

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   Alternatively, you can also execute the YAML file directly from the Git repository:

   $ oc create -f https://raw.githubusercontent.com/openshift/pipelines-tutorial/pipelines-1.13/01_pipeline/04_pipeline.yaml

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3. Use the tkn pipeline list command to verify that the pipeline is added to the application:

   $ tkn pipeline list

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   The output verifies that the build-and-deploy pipeline was created:

   NAME               AGE            LAST RUN   STARTED   DURATION   STATUS
   build-and-deploy   1 minute ago   ---        ---       ---        ---

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Procedure

1. Mirror the builder image from the mirror registry for the front-end interface, pipelines-vote-ui.

   1. Verify that the required images tag is not imported:

      $ oc describe imagestream python -n openshift

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      Example output

      Name:			python
      Namespace:		openshift
      [...]
      
      3.8-ubi9 (latest)
        tagged from registry.redhat.io/ubi9/python-38:latest
          prefer registry pullthrough when referencing this tag
      
        Build and run Python 3.8 applications on UBI 8. For more information about using this builder image, including OpenShift considerations, see https://github.com/sclorg/s2i-python-container/blob/master/3.8/README.md.
        Tags: builder, python
        Supports: python:3.8, python
        Example Repo: https://github.com/sclorg/django-ex.git
      
      [...]

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   2. Mirror the supported image tag to the private registry:

      $ oc image mirror registry.redhat.io/ubi9/python-39:latest <mirror-registry>:<port>/ubi9/python-39

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   3. Import the image:

      $ oc tag <mirror-registry>:<port>/ubi9/python-39 python:latest --scheduled -n openshift

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      You must periodically re-import the image. The --scheduled flag enables automatic re-import of the image.

   4. Verify that the images with the given tag have been imported:

      $ oc describe imagestream python -n openshift

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      Example output

      Name:			python
      Namespace:		openshift
      [...]
      
      latest
        updates automatically from registry  <mirror-registry>:<port>/ubi9/python-39
      
        *  <mirror-registry>:<port>/ubi9/python-39@sha256:3ee...
      
      [...]

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2. Mirror the builder image from the mirror registry for the back-end interface, pipelines-vote-api.

   1. Verify that the required images tag is not imported:

      $ oc describe imagestream golang -n openshift

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      Example output

      Name:			golang
      Namespace:		openshift
      [...]
      
      1.14.7-ubi8 (latest)
        tagged from registry.redhat.io/ubi8/go-toolset:1.14.7
          prefer registry pullthrough when referencing this tag
      
        Build and run Go applications on UBI 8. For more information about using this builder image, including OpenShift considerations, see https://github.com/sclorg/golang-container/blob/master/README.md.
        Tags: builder, golang, go
        Supports: golang
        Example Repo: https://github.com/sclorg/golang-ex.git
      
      [...]

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   2. Mirror the supported image tag to the private registry:

      $ oc image mirror registry.redhat.io/ubi9/go-toolset:latest <mirror-registry>:<port>/ubi9/go-toolset

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   3. Import the image:

      $ oc tag <mirror-registry>:<port>/ubi9/go-toolset golang:latest --scheduled -n openshift

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      You must periodically re-import the image. The --scheduled flag enables automatic re-import of the image.

   4. Verify that the images with the given tag have been imported:

      $ oc describe imagestream golang -n openshift

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      Example output

      Name:			golang
      Namespace:		openshift
      [...]
      
      latest
        updates automatically from registry <mirror-registry>:<port>/ubi9/go-toolset
      
        * <mirror-registry>:<port>/ubi9/go-toolset@sha256:59a74d581df3a2bd63ab55f7ac106677694bf612a1fe9e7e3e1487f55c421b37
      
      [...]

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3. Mirror the builder image from the mirror registry for the cli.

   1. Verify that the required images tag is not imported:

      $ oc describe imagestream cli -n openshift

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      Example output

      Name:                   cli
      Namespace:              openshift
      [...]
      
      latest
        updates automatically from registry quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:65c68e8c22487375c4c6ce6f18ed5485915f2bf612e41fef6d41cbfcdb143551
      
        * quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:65c68e8c22487375c4c6ce6f18ed5485915f2bf612e41fef6d41cbfcdb143551
      
      [...]

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   2. Mirror the supported image tag to the private registry:

      $ oc image mirror quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:65c68e8c22487375c4c6ce6f18ed5485915f2bf612e41fef6d41cbfcdb143551 <mirror-registry>:<port>/openshift-release-dev/ocp-v4.0-art-dev:latest

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   3. Import the image:

      $ oc tag <mirror-registry>:<port>/openshift-release-dev/ocp-v4.0-art-dev cli:latest --scheduled -n openshift

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      You must periodically re-import the image. The --scheduled flag enables automatic re-import of the image.

   4. Verify that the images with the given tag have been imported:

      $ oc describe imagestream cli -n openshift

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      Example output

      Name:                   cli
      Namespace:              openshift
      [...]
      
      latest
        updates automatically from registry <mirror-registry>:<port>/openshift-release-dev/ocp-v4.0-art-dev
      
        * <mirror-registry>:<port>/openshift-release-dev/ocp-v4.0-art-dev@sha256:65c68e8c22487375c4c6ce6f18ed5485915f2bf612e41fef6d41cbfcdb143551
      
      [...]

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Procedure

1. Start the pipeline for the back-end application:

   $ tkn pipeline start build-and-deploy \
       -w name=shared-workspace,volumeClaimTemplateFile=https://raw.githubusercontent.com/openshift/pipelines-tutorial/pipelines-1.13/01_pipeline/03_persistent_volume_claim.yaml \
       -p deployment-name=pipelines-vote-api \
       -p git-url=https://github.com/openshift/pipelines-vote-api.git \
       -p IMAGE='image-registry.openshift-image-registry.svc:5000/pipelines-tutorial/pipelines-vote-api' \
       --use-param-defaults

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   The previous command uses a volume claim template, which creates a persistent volume claim for the pipeline execution.

2. To track the progress of the pipeline run, enter the following command::

   $ tkn pipelinerun logs <pipelinerun_id> -f

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   The <pipelinerun_id> in the above command is the ID for the PipelineRun that was returned in the output of the previous command.

3. Start the pipeline for the front-end application:

   $ tkn pipeline start build-and-deploy \
       -w name=shared-workspace,volumeClaimTemplateFile=https://raw.githubusercontent.com/openshift/pipelines-tutorial/pipelines-1.13/01_pipeline/03_persistent_volume_claim.yaml \
       -p deployment-name=pipelines-vote-ui \
       -p git-url=https://github.com/openshift/pipelines-vote-ui.git \
       -p IMAGE='image-registry.openshift-image-registry.svc:5000/pipelines-tutorial/pipelines-vote-ui' \
       --use-param-defaults

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4. To track the progress of the pipeline run, enter the following command:

   $ tkn pipelinerun logs <pipelinerun_id> -f

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   The <pipelinerun_id> in the above command is the ID for the PipelineRun that was returned in the output of the previous command.

5. After a few minutes, use tkn pipelinerun list command to verify that the pipeline ran successfully by listing all the pipeline runs:

   $ tkn pipelinerun list

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   The output lists the pipeline runs:

    NAME                         STARTED      DURATION     STATUS
    build-and-deploy-run-xy7rw   1 hour ago   2 minutes    Succeeded
    build-and-deploy-run-z2rz8   1 hour ago   19 minutes   Succeeded

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6. Get the application route:

   $ oc get route pipelines-vote-ui --template='http://{{.spec.host}}'

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   Note the output of the previous command. You can access the application using this route.

7. To rerun the last pipeline run, using the pipeline resources and service account of the previous pipeline, run:

   $ tkn pipeline start build-and-deploy --last

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Procedure

1. Copy the content of the following sample TriggerBinding YAML file and save it:

   apiVersion: triggers.tekton.dev/v1beta1
   kind: TriggerBinding
   metadata:
     name: vote-app
   spec:
     params:
     - name: git-repo-url
       value: $(body.repository.url)
     - name: git-repo-name
       value: $(body.repository.name)
     - name: git-revision
       value: $(body.head_commit.id)

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2. Create the TriggerBinding resource:

   $ oc create -f <triggerbinding-yaml-file-name.yaml>

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   Alternatively, you can create the TriggerBinding resource directly from the pipelines-tutorial Git repository:

   $ oc create -f https://raw.githubusercontent.com/openshift/pipelines-tutorial/pipelines-1.13/03_triggers/01_binding.yaml

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3. Copy the content of the following sample TriggerTemplate YAML file and save it:

   apiVersion: triggers.tekton.dev/v1beta1
   kind: TriggerTemplate
   metadata:
     name: vote-app
   spec:
     params:
     - name: git-repo-url
       description: The git repository url
     - name: git-revision
       description: The git revision
       default: pipelines-1.13
     - name: git-repo-name
       description: The name of the deployment to be created / patched
   
     resourcetemplates:
     - apiVersion: tekton.dev/v1
       kind: PipelineRun
       metadata:
         generateName: build-deploy-$(tt.params.git-repo-name)-
       spec:
         taskRunTemplate:
           serviceAccountName: pipeline
         pipelineRef:
           name: build-and-deploy
         params:
         - name: deployment-name
           value: $(tt.params.git-repo-name)
         - name: git-url
           value: $(tt.params.git-repo-url)
         - name: git-revision
           value: $(tt.params.git-revision)
         - name: IMAGE
           value: image-registry.openshift-image-registry.svc:5000/pipelines-tutorial/$(tt.params.git-repo-name)
         workspaces:
         - name: shared-workspace
           volumeClaimTemplate:
             spec:
               accessModes:
                 - ReadWriteOnce
               resources:
                 requests:
                   storage: 500Mi

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   The template specifies a volume claim template to create a persistent volume claim for defining the storage volume for the workspace. Therefore, you do not need to create a persistent volume claim to provide data storage.

4. Create the TriggerTemplate resource:

   $ oc create -f <triggertemplate-yaml-file-name.yaml>

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   Alternatively, you can create the TriggerTemplate resource directly from the pipelines-tutorial Git repository:

   $ oc create -f https://raw.githubusercontent.com/openshift/pipelines-tutorial/pipelines-1.13/03_triggers/02_template.yaml

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5. Copy the contents of the following sample Trigger YAML file and save it:

   apiVersion: triggers.tekton.dev/v1beta1
   kind: Trigger
   metadata:
     name: vote-trigger
   spec:
     taskRunTemplate:
       serviceAccountName: pipeline
     bindings:
       - ref: vote-app
     template:
       ref: vote-app

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6. Create the Trigger resource:

   $ oc create -f <trigger-yaml-file-name.yaml>

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   Alternatively, you can create the Trigger resource directly from the pipelines-tutorial Git repository:

   $ oc create -f https://raw.githubusercontent.com/openshift/pipelines-tutorial/pipelines-1.13/03_triggers/03_trigger.yaml

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7. Copy the contents of the following sample EventListener YAML file and save it:

   apiVersion: triggers.tekton.dev/v1beta1
   kind: EventListener
   metadata:
     name: vote-app
   spec:
     taskRunTemplate:
       serviceAccountName: pipeline
     triggers:
       - triggerRef: vote-trigger

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   Alternatively, if you have not defined a trigger custom resource, add the binding and template spec to the EventListener YAML file, instead of referring to the name of the trigger:

   apiVersion: triggers.tekton.dev/v1beta1
   kind: EventListener
   metadata:
     name: vote-app
   spec:
     taskRunTemplate:
       serviceAccountName: pipeline
     triggers:
     - bindings:
       - ref: vote-app
       template:
         ref: vote-app

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8. Create the EventListener resource by performing the following steps:

   • To create an EventListener resource using a secure HTTPS connection:

     1. Add a label to enable the secure HTTPS connection to the Eventlistener resource:

        $ oc label namespace <ns-name> operator.tekton.dev/enable-annotation=enabled

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     2. Create the EventListener resource:

        $ oc create -f <eventlistener-yaml-file-name.yaml>

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        Alternatively, you can create the EvenListener resource directly from the pipelines-tutorial Git repository:

        $ oc create -f https://raw.githubusercontent.com/openshift/pipelines-tutorial/pipelines-1.13/03_triggers/04_event_listener.yaml

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     3. Create a route with the re-encrypt TLS termination:

        $ oc create route reencrypt --service=<svc-name> --cert=tls.crt --key=tls.key --ca-cert=ca.crt --hostname=<hostname>

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        Alternatively, you can create a re-encrypt TLS termination YAML file to create a secured route.

        Example Re-encrypt TLS Termination YAML of the Secured Route

        apiVersion: route.openshift.io/v1
        kind: Route
        metadata:
          name: route-passthrough-secured 

        1

        
        spec:
          host: <hostname>
          to:
            kind: Service
            name: frontend 

        2

        
          tls:
            termination: reencrypt         

        3

        
            key: [as in edge termination]
            certificate: [as in edge termination]
            caCertificate: [as in edge termination]
            destinationCACertificate: |-   

        4

        
              -----BEGIN CERTIFICATE-----
              [...]
              -----END CERTIFICATE-----

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        1 2

        The name of the object, which is limited to 63 characters.

        3

        The termination field is set to reencrypt. This is the only required tls field.

        4

        Required for re-encryption. destinationCACertificate specifies a CA certificate to validate the endpoint certificate, securing the connection from the router to the destination pods. If the service is using a service signing certificate, or the administrator has specified a default CA certificate for the router and the service has a certificate signed by that CA, this field can be omitted.

        See oc create route reencrypt --help for more options.

   • To create an EventListener resource using an insecure HTTP connection:

     1. Create the EventListener resource.

     2. Expose the EventListener service as an OpenShift Container Platform route to make it publicly accessible:

        $ oc expose svc el-vote-app

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Procedure

1. Configure cluster-wide fetch permission for the event listener.

   1. Set a service account name to be used in the ClusterRoleBinding and EventListener objects. For example, el-sa.

      Example ServiceAccount.yaml

      apiVersion: v1
      kind: ServiceAccount
      metadata:
        name: el-sa
      ---

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   2. In the rules section of the ClusterRole.yaml file, set appropriate permissions for every event listener deployment to function cluster-wide.

      Example ClusterRole.yaml

      kind: ClusterRole
      apiVersion: rbac.authorization.k8s.io/v1
      metadata:
        name: el-sel-clusterrole
      rules:
      - apiGroups: ["triggers.tekton.dev"]
        resources: ["eventlisteners", "clustertriggerbindings", "clusterinterceptors", "triggerbindings", "triggertemplates", "triggers"]
        verbs: ["get", "list", "watch"]
      - apiGroups: [""]
        resources: ["configmaps", "secrets"]
        verbs: ["get", "list", "watch"]
      - apiGroups: [""]
        resources: ["serviceaccounts"]
        verbs: ["impersonate"]
      ...

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   3. Configure cluster role binding with the appropriate service account name and cluster role name.

      Example ClusterRoleBinding.yaml

      apiVersion: rbac.authorization.k8s.io/v1
      kind: ClusterRoleBinding
      metadata:
        name: el-mul-clusterrolebinding
      subjects:
      - kind: ServiceAccount
        name: el-sa
        namespace: default
      roleRef:
        apiGroup: rbac.authorization.k8s.io
        kind: ClusterRole
        name: el-sel-clusterrole
      ...

      Copy to Clipboard Toggle word wrap

2. In the spec parameter of the event listener, add the service account name, for example el-sa. Fill the namespaceSelector parameter with names of namespaces where event listener is intended to serve.

   Example EventListener.yaml

   apiVersion: triggers.tekton.dev/v1beta1
   kind: EventListener
   metadata:
     name: namespace-selector-listener
   spec:
     taskRunTemplate:
       serviceAccountName: el-sa
     namespaceSelector:
       matchNames:
       - default
       - foo
   ...

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3. Create a service account with the necessary permissions, for example foo-trigger-sa. Use it for role binding the triggers.

   Example ServiceAccount.yaml

   apiVersion: v1
   kind: ServiceAccount
   metadata:
     name: foo-trigger-sa
     namespace: foo
   ...

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   Example RoleBinding.yaml

   apiVersion: rbac.authorization.k8s.io/v1
   kind: RoleBinding
   metadata:
     name: triggercr-rolebinding
     namespace: foo
   subjects:
   - kind: ServiceAccount
     name: foo-trigger-sa
     namespace: foo
   roleRef:
     apiGroup: rbac.authorization.k8s.io
     kind: ClusterRole
     name: tekton-triggers-eventlistener-roles
   ...

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4. Create a trigger with the appropriate trigger template, trigger binding, and service account name.

   Example Trigger.yaml

   apiVersion: triggers.tekton.dev/v1beta1
   kind: Trigger
   metadata:
     name: trigger
     namespace: foo
   spec:
     taskRunTemplate:
       serviceAccountName: foo-trigger-sa
     interceptors:
       - ref:
           name: "github"
         params:
           - name: "secretRef"
             value:
               secretName: github-secret
               secretKey: secretToken
           - name: "eventTypes"
             value: ["push"]
     bindings:
       - ref: vote-app
     template:
       ref: vote-app
   ...

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Procedure

1. Get the webhook URL:

   • For a secure HTTPS connection:

     $ echo "URL: $(oc  get route el-vote-app --template='https://{{.spec.host}}')"

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   • For an HTTP (insecure) connection:

     $ echo "URL: $(oc  get route el-vote-app --template='http://{{.spec.host}}')"

     Copy to Clipboard Toggle word wrap

     Note the URL obtained in the output.

2. Configure webhooks manually on the front-end repository:

   1. Open the front-end Git repository pipelines-vote-ui in your browser.
   2. Click Settings → Webhooks → Add Webhook

   3. On the Webhooks/Add Webhook page:

      1. Enter the webhook URL from step 1 in Payload URL field
      2. Select application/json for the Content type
      3. Specify the secret in the Secret field
      4. Ensure that the Just the push event is selected
      5. Select Active
      6. Click Add Webhook
3. Repeat step 2 for the back-end repository pipelines-vote-api.

Procedure

1. From the terminal, clone your forked Git repository pipelines-vote-ui:

   $ git clone git@github.com:<your GitHub ID>/pipelines-vote-ui.git -b pipelines-1.13

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2. Push an empty commit:

   $ git commit -m "empty-commit" --allow-empty && git push origin pipelines-1.13

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3. Check if the pipeline run was triggered:

   $ tkn pipelinerun list

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   Notice that a new pipeline run was initiated.

Procedure

1. For each event listener, create a service monitor. For example, to view the metrics for the github-listener event listener in the test namespace, create the following service monitor:

   apiVersion: monitoring.coreos.com/v1
   kind: ServiceMonitor
   metadata:
     labels:
       app.kubernetes.io/managed-by: EventListener
       app.kubernetes.io/part-of: Triggers
       eventlistener: github-listener
     annotations:
       networkoperator.openshift.io/ignore-errors: ""
     name: el-monitor
     namespace: test
   spec:
     endpoints:
       - interval: 10s
         port: http-metrics
     jobLabel: name
     namespaceSelector:
       matchNames:
         - test
     selector:
       matchLabels:
         app.kubernetes.io/managed-by: EventListener
         app.kubernetes.io/part-of: Triggers
         eventlistener: github-listener
   ...

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2. Test the service monitor by sending a request to the event listener. For example, push an empty commit:

   $ git commit -m "empty-commit" --allow-empty && git push origin main

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3. On the OpenShift Container Platform web console, navigate to Administrator → Observe → Metrics.
4. To view a metric, search by its name. For example, to view the details of the eventlistener_http_resources metric for the github-listener event listener, search using the eventlistener_http_resources keyword.

Procedure

1. Navigate to the Pipelines page to view existing pipeline templates.
2. Click the icon to go to the Import YAML page.

3. Add the YAML for your pipeline template. The template must include the following information:

   apiVersion: tekton.dev/v1
   kind: Pipeline
   metadata:
   # ...
     namespace: openshift 

   1

   
     labels:
       pipeline.openshift.io/runtime: <runtime> 

   2

   
       pipeline.openshift.io/type: <pipeline-type> 

   3

   
   # ...

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   1

   The template must be created in the openshift namespace.

   2

   The template must contain the pipeline.openshift.io/runtime label. The accepted runtime values for this label are nodejs, golang, dotnet, java, php, ruby, perl, python, nginx, and httpd.

   3

   The template must contain the pipeline.openshift.io/type: label. The accepted type values for this label are openshift, knative, and kubernetes.

4. Click Create. After the pipeline has been created, you are taken to the Pipeline details page, where you can view information about or edit your pipeline.