Adding the GitHub Actions file for prombench.

This commit adds the GitHub Actions file to trigger the benchmarking
process for GMP Collector (using the prombench tool).

Signed-off-by: saketjajoo <saketjajoo77@gmail.com>

Updating the default permissions for GITHUB_TOKEN and setting the COMMENTER as an env variable.

Signed-off-by: saketjajoo <saketjajoo77@gmail.com>

.github/workflows/prombench-gmp-collector.yml

@@ -0,0 +1,180 @@
+name: "Run Prombench"
+
+on:
+  push:
+    tags:
+      - 'v*-gmp.*'
+  issue_comment:                                 
+    types:
+      - created
+
+env:
+  CANCEL_BENCHMARK: "false"
+  CLUSTER_NAME: "prombench"
+  COLLECTOR_IMAGE_REPOSITORY: "gke.gcr.io/prometheus-engine/prometheus"
+  CREATE_CLUSTER: "true"
+  DASHBOARD_ID: 33755240-08f9-4db9-a86f-839481fd5002
+  DISABLE_LOADGEN_QUERIER: "true"
+  DOMAIN_NAME: ""
+  GITHUB_ORG: ${{ github.repository_owner }} # GoogleCloudPlatform
+  GITHUB_REPO: ${{ github.event.repository.name }} # prometheus
+  GITHUB_STATUS_TARGET_URL: ""
+  GKE_PROJECT_ID: ${{ secrets.GKE_PROJECT_ID }}
+  GRAFANA_ADMIN_PASSWORD: admin
+  LAST_COMMIT_SHA: ${{ github.event.client_payload.LAST_COMMIT_SHA }}
+  OAUTH_TOKEN: ""
+  PR_NUMBER: ${{github.event.issue.number}}
+  PROMBENCH_DOCKER_IMAGE_REPOSITORY: "docker://saketjajoo/prombench:latest"
+  PROVIDER: gke
+  RELEASE: ${{ github.event.repository.default_branch }} # e.g. main / release-X.Y.Z-gmp / etc.
+  SERVICEACCOUNT_CLIENT_EMAIL: ${{ secrets.SERVICEACCOUNT_CLIENT_EMAIL }}
+  WH_SECRET: ""
+  ZONE: us-east4-a
+
+jobs:
+  benchmark:
+    if: contains(github.event.comment.html_url, '/pull/') && contains(github.event.comment.body, '/prombench')
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+
+      - name: verify_user
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          COMMENTER: ${{ github.event.comment.user.login }}
+        run: |
+          COMMENTER_PERMISSION=$(curl --silent -L -H "Accept: application/vnd.github+json" -H "Authorization: Bearer ${GITHUB_TOKEN}" \
+              -H "X-GitHub-Api-Version: 2022-11-28" \
+              https://api.github.com/repos/${GITHUB_ORG}/${GITHUB_REPO}/collaborators/${COMMENTER}/permission | jq --raw-output .permission)
+          
+          if ! ([ "${COMMENTER_PERMISSION}" == "admin" ] || [ "${COMMENTER_PERMISSION}" == "write" ])
+          then
+            echo "${COMMENTER} does not have admin or write privileges. Therefore cannot execute the benchmark command."
+            
+            curl --silent -L -X POST -H "Accept: application/vnd.github+json" -H "Authorization: Bearer $GITHUB_TOKEN" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            https://api.github.com/repos/${GITHUB_ORG}/${GITHUB_REPO}/issues/${PR_NUMBER}/comments \
+            --data '{ "body": "'${COMMENTER}' does not have admin or write privileges. Therefore cannot execute the benchmark command." }'
+            exit 1
+          fi
+
+      - uses: 'actions/checkout@v3'
+
+      - id: 'auth'
+        name: 'Authenticate to Google Cloud'
+        uses: 'google-github-actions/auth@v1'
+        with:
+          credentials_json: '${{ secrets.GOOGLE_APPLICATION_CREDENTIALS }}'
+
+      - name: 'Set up Google Cloud SDK'
+        uses: 'google-github-actions/setup-gcloud@v1'
+
+
+      - name: check_benchmark_trigger_action
+        run: |
+          GMP_COLLECTOR_TAG=$(echo ${{ github.event.comment.body }} | head -n 1 | awk '{ print $2 }')
+
+          if [ "$2" == "cancel" ]
+          then
+            
+            echo "Cancelling the benchmark run for PR #${PR_NUMBER}."
+            CANCEL_BENCHMARK="true"
+            echo "CANCEL_BENCHMARK=${CANCEL_BENCHMARK}" >> $GITHUB_ENV
+
+          else
+            
+            echo "GMP Collector Tag: ${GMP_COLLECTOR_TAG}"
+
+            function get_default_collector_tag() {
+              DEFAULT_COLLECTOR_TAG=$(gcloud container images list-tags ${COLLECTOR_IMAGE_REPOSITORY} --sort-by=UPDATE_TIME,TAGS | tail -1 | awk '{ print $2 }')
+            }
+
+            if [[ $GMP_COLLECTOR_TAG == '' ]]
+            then
+              echo "Since the collector version is missing, the latest one would be used."
+              get_default_collector_tag
+              echo "COLLECTOR_RELEASE_VERSION=${DEFAULT_COLLECTOR_TAG}" >> $GITHUB_ENV
+              export COLLECTOR_RELEASE_VERSION="${DEFAULT_COLLECTOR_TAG}"
+            else
+              GCLOUD_TAG=$(gcloud container images list-tags --filter="tags:${GMP_COLLECTOR_TAG}" --format=json ${COLLECTOR_IMAGE_REPOSITORY})
+              if [[ "$GCLOUD_TAG" == "[]" ]]
+              then
+                echo "The ${COLLECTOR_IMAGE_REPOSITORY} image does not have the ${GMP_COLLECTOR_TAG} tag. Hence, this run will use the default latest tag."
+                DEFAULT_COLLECTOR_TAG=$(get_default_collector_tag)
+                echo "COLLECTOR_RELEASE_VERSION=${DEFAULT_COLLECTOR_TAG}" >> $GITHUB_ENV
+                export COLLECTOR_RELEASE_VERSION="${DEFAULT_COLLECTOR_TAG}"
+              else
+                echo "COLLECTOR_RELEASE_VERSION=${GMP_COLLECTOR_TAG}" >> $GITHUB_ENV
+                export COLLECTOR_RELEASE_VERSION="${GMP_COLLECTOR_TAG}"
+              fi
+            fi
+            
+            echo "The release/base GMP Collector's tag is set to: ${COLLECTOR_RELEASE_VERSION}."
+
+          fi
+
+      
+      - name: check_cluster_existance
+        run: |
+          if RETURN=$(gcloud container clusters describe "${CLUSTER_NAME}" --project="${GKE_PROJECT_ID}" --location="${ZONE}" >/dev/null 2>&1)
+          then
+            CREATE_CLUSTER="false"
+            echo "CREATE_CLUSTER=${CREATE_CLUSTER}" >> $GITHUB_ENV
+            echo "The cluster (name: ${CLUSTER_NAME}) already exists. Therefore, skipping cluster creation."
+          else
+            CREATE_CLUSTER="true"
+            echo "CREATE_CLUSTER=${CREATE_CLUSTER}" >> $GITHUB_ENV
+            echo "The cluster (name: ${CLUSTER_NAME}) does not exist, the cluster will get created before creating the nodes and triggering the benchmark process."
+          fi
+
+      
+      - name: cluster_create
+        if: env.CREATE_CLUSTER == 'true'
+        uses: ${PROMBENCH_DOCKER_IMAGE_REPOSITORY}
+        with:
+            args: make cluster_create;
+
+      - name: cluster_resource_apply
+        if: env.CREATE_CLUSTER == 'true'
+        uses: ${PROMBENCH_DOCKER_IMAGE_REPOSITORY}
+        with:
+            args: make cluster_resource_apply;
+
+      - name: node_create
+        if: env.CANCEL_BENCHMARK == 'false'
+        uses: ${PROMBENCH_DOCKER_IMAGE_REPOSITORY}
+        with:
+            args: >-
+              make clean;
+              until make all_nodes_deleted; do echo "Waiting for nodepools to be deleted"; sleep 10; done;
+              make node_create;
+      
+      - name: node_resource_apply
+        if: env.CANCEL_BENCHMARK == 'false'
+        uses: ${PROMBENCH_DOCKER_IMAGE_REPOSITORY}
+        with:
+            args: make resource_apply;
+
+
+      - name: post_benchmark_dashboard_url_to_pr
+        if: env.CANCEL_BENCHMARK == 'false'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          MONITORING_DASHBOARD_URL="https://console.cloud.google.com/monitoring/dashboards/builder/${DASHBOARD_ID};duration=PT15M?f.rlabel.cluster_name=${CLUSTER_NAME}&f.rlabel.namespace=prombench-${PR_NUMBER}&f.umlabel.goog-k8s-cluster-name=${CLUSTER_NAME}"
+          
+          
+          COMMENT_MSG="The benchmark results can be viewed at: ${MONITORING_DASHBOARD_URL}.\n\nTo cancel the benchmark, comment \`/prombench cancel\` on this PR."
+
+          curl --silent -L -X POST -H "Accept: application/vnd.github+json" -H "Authorization: Bearer $GITHUB_TOKEN" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            https://api.github.com/repos/${GITHUB_ORG}/${GITHUB_REPO}/issues/${PR_NUMBER}/comments \
+            --data '{ "body": "'"${COMMENT_MSG}"'" }'
+
+      
+      - name: node_delete
+        if: env.CANCEL_BENCHMARK == 'true'
+        uses: ${PROMBENCH_DOCKER_IMAGE_REPOSITORY}
+        with:
+            args: make clean;