chore: terminate builder instance on job cancellation

Author: pcnc

.github/workflows/ami-release.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Build AMI
         run: |
           GIT_SHA=$(git rev-parse HEAD)
-          packer build -var "git-head-version=${GIT_SHA}" -var-file="development-arm.vars.pkr.hcl" -var-file="common.vars.pkr.hcl" amazon-arm64.pkr.hcl
+          packer build -var "git-head-version=${GIT_SHA}" -var "packer-execution-id=${GITHUB_RUN_ID}" -var-file="development-arm.vars.pkr.hcl" -var-file="common.vars.pkr.hcl" amazon-arm64.pkr.hcl
 
       - name: Slack Notification on Failure
         if: ${{ failure() }}
@@ -30,12 +30,7 @@ jobs:
           SLACK_MESSAGE: 'Building Postgres AMI failed'
           SLACK_FOOTER: ''
 
-      - name: Slack Notification on Cancel
+      - name: Cleanup resources on build cancellation
         if: ${{ cancelled() }}
-        uses: rtCamp/action-slack-notify@v2
-        env:
-          SLACK_WEBHOOK: ${{ secrets.SLACK_NOTIFICATIONS_WEBHOOK }}
-          SLACK_USERNAME: 'gha-failures-notifier'
-          SLACK_COLOR: 'danger'
-          SLACK_MESSAGE: 'Postgres AMI build cancelled. Reminder to clean up any Packer instances that may have been left running. @group-infra'
-          SLACK_FOOTER: ''
+        run: |
+          aws ec2 describe-instances --filters "Name=tag:packerExecutionId,Values=${GITHUB_RUN_ID}" --query "Reservations[].Instances[].InstanceId" --output text | xargs -I {} aws ec2 terminate-instances --instance-ids {}

amazon-arm64.pkr.hcl

@@ -82,6 +82,11 @@ variable "git-head-version" {
   default = "unknown"
 }
 
+variable "packer-execution-id" {
+  type = string
+  default = "unknown"
+}
+
 # source block
 source "amazon-ebssurrogate" "source" {
   profile = "${var.profile}"
@@ -129,8 +134,9 @@ source "amazon-ebssurrogate" "source" {
   }
 
   run_tags = {
-    creator = "packer"
-    appType = "postgres"
+    creator           = "packer"
+    appType           = "postgres"
+    packerExecutionId = "${var.packer-execution-id}"
   }
   run_volume_tags = {
     creator = "packer"