OpenShift Pipelines のエラー通知を Slack に送信してみた

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:
  name: send-to-webhook-slack
  labels:
    app.kubernetes.io/version: "0.1"
  annotations:
    tekton.dev/pipelines.minVersion: "0.12.1"
    tekton.dev/categories: Messaging
    tekton.dev/tags: messaging
    tekton.dev/displayName: "Send message to Slack Channel"
    tekton.dev/platforms: "linux/amd64,linux/s390x,linux/ppc64le"
spec:
  description: >-
    These tasks post a simple message to a slack channel.


    This task uses Incoming Webhooks of slack to send the message.


  params:
  - name: webhook-secret
    type: string
    description: secret name of the slack app webhook URL (key is url)
  - name: message
    type: string
    description: plain text message
    default: 'Webhook-test'
  - name: bot-name
    type: string
    description: plain text message
　　# 下記を作成した Slack App の名前に変更
    default: 'sample app'
  - name: icon-emoji
    type: string
    description: plain text message
    default: ':ロボット:'
  steps:
  - name: post
    image: docker.io/curlimages/curl:7.70.0@sha256:031df77a11e5edded840bc761a845eab6e3c2edee22669fb8ad6d59484b6a1c4 #tag: 7.70.0
    script: |
      #!/usr/bin/env sh
      MESSAGE=$(echo "${MESSAGE}" | sed -e 's/\"/\\\\"/g')
      BOTNAME=$(echo "${BOTNAME}" | sed -e 's/\"/\\\\"/g')
      JSON="{\"text\": \"${MESSAGE}\", \"username\": \"${BOTNAME}\", \"icon_emoji\": \"${EMOJI}\"}"
      curl -X POST -H 'Content-Type: application/json' --data "${JSON}" "${URL}"
    env:
    - name: URL
      valueFrom:
        secretKeyRef:
          name: $(params.webhook-secret)
          key: url
    - name: MESSAGE
      value: $(params.message)
    - name: BOTNAME
      value: $(params.bot-name)
    - name: EMOJI
      value: $(params.icon-emoji)

apiVersion: triggers.tekton.dev/v1beta1
kind: TriggerBinding
metadata:
  name: failure-trigger-binding
spec:
  params:
  - name: message
    value: "Failed pipeline $(body.pipelineRun.metadata.name)"

apiVersion: triggers.tekton.dev/v1beta1
kind: TriggerTemplate
metadata:
  name: failure-trigger-template
spec:
  params:
    - name: message
    - name: bot-name
  resourcetemplates:
  - apiVersion: tekton.dev/v1beta1
    kind: TaskRun
    metadata:
      generateName: failure-handler
    spec:
      params:
      - name: webhook-secret
        value: webhook-secret
      - name: message
        value: $(tt.params.message)
      - name: bot-name
        value: $(tt.params.bot-name)
      taskRef:
        name: send-to-webhook-slack

apiVersion: triggers.tekton.dev/v1beta1
kind: EventListener
metadata:
  name: failure-event-listener
spec:
  serviceAccountName: pipeline
  triggers:
    - name: failure-trigger
      interceptors:
        - ref:
            name: cel
          params:
          - name: "filter"
            value: "header.match('ce-type', 'dev.tekton.event.pipelinerun.failed.v1')"
      bindings:
      - ref: failure-trigger-binding
      template:
        ref: failure-trigger-template
  resources:
       kubernetesResource:
         spec:
           template:
             spec:
               serviceAccountName: pipeline
               containers:
               - resources:
                   requests:
                     cpu: "250m"
                     memory: "64Mi"
                   limits:
                     cpu: "500m"
                     memory: "128Mi"

apiVersion: v1
kind: ConfigMap
metadata:
  name: config-events
  namespace: openshift-pipelines
  labels:
    app.kubernetes.io/instance: default
    app.kubernetes.io/part-of: openshift-pipelines
data:
  formats: tektonv1
  # ここに前項で取得した EventListener の webhook-url を入力
  sink: http://el-failure-event-listener-ci-pipeline.apps.xxx