Adding a job that will purge AWS EKS clusters every 6 hours (#1462)

Signed-off-by: ytimocin <ytimocin@microsoft.com>

.github/scripts/purge-aws-eks-clusters.sh

@@ -0,0 +1,47 @@
+# ------------------------------------------------------------
+# Copyright 2023 The Radius Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ------------------------------------------------------------
+
+#!/bin/bash
+
+# Current time in seconds since epoch
+current_time=$(date +%s)
+
+# Age limit in seconds (6 hours * 3600 seconds/hour)
+age_limit=$((6 * 3600))
+
+echo "Starting cluster purge script."
+
+# List clusters and their creation times, filter and delete those older than 6 hours and starting with 'eks-samplestest-'
+aws eks list-clusters --query "clusters[]" --output text | xargs -I {} aws eks describe-cluster --name {} --query "cluster.{name: name, createdAt: createdAt}" --output text | while read -r created_at name; do
+    # Convert creation time to seconds since the epoch
+    # Remove milliseconds and adjust timezone format from "-07:00" to "-0700"
+    formatted_created_at="${created_at%.*}${created_at##*.}"
+    formatted_created_at="${formatted_created_at%:*}${formatted_created_at##*:}"
+
+    # Convert creation time to seconds
+    created_at_seconds=$(date -d "$formatted_created_at" +%s)
+
+    # Calculate age in seconds
+    age=$((current_time - created_at_seconds))
+
+    # Check if age is greater than age limit and name starts with 'eks-samplestest-'
+    if [ "$age" -gt "$age_limit" ] && [[ "$name" == eks-samplestest-* ]]; then
+        echo "Deleting cluster $name older than 6 hours."
+        eksctl delete cluster --name "$name" --wait --force
+    else
+        echo "Cluster $name is not older than 6 hours or does not meet naming criteria."
+    fi
+done

.github/scripts/purge-aws-rds-snapshots.sh

@@ -4,7 +4,7 @@
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
-#    
+#
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
@@ -16,8 +16,7 @@
 
 set -xe
 
-aws rds describe-db-snapshots --query 'DBSnapshots[].DBSnapshotIdentifier' --output text > snapshots.txt
-for rds_snapshot_identifier in $(cat ./snapshots.txt)    
-do
+aws rds describe-db-snapshots --query 'DBSnapshots[].DBSnapshotIdentifier' --output text >snapshots.txt
+for rds_snapshot_identifier in $(cat ./snapshots.txt); do
     aws rds delete-db-snapshot --db-snapshot-identifier $rds_snapshot_identifier
 done

.github/workflows/purge-aws-eks-clusters.yaml

@@ -0,0 +1,42 @@
+name: Purge AWS EKS Clusters
+
+on:
+  schedule:
+    # Runs every day at 7 AM
+    - cron: "0 7 * * *"
+
+env:
+  GH_TOKEN: ${{ github.token }}
+  AWS_REGION: us-west-2
+
+jobs:
+  purge_eks_clusters:
+    name: Purge AWS EKS Clusters
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Install AWS CLI
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y awscli
+
+      - name: Install eksctl
+        run: |
+          curl --silent --location "https://github.com/weaveworks/eksctl/releases/latest/download/eksctl_$(uname -s)_amd64.tar.gz" | tar xz -C /tmp
+          sudo mv /tmp/eksctl /usr/local/bin
+
+      - name: Delete old EKS clusters
+        env:
+          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+          AWS_REGION: ${{ env.AWS_REGION }}
+        run: bash .github/scripts/purge-aws-eks-clusters.sh
+
+      - name: Create GitHub issue on failure
+        if: failure() && github.event_name != 'pull_request'
+        run: |
+          gh issue create --title "Purge AWS EKS Clusters workflow failed" \
+            --body "Test failed on ${{ github.repository }}. See [workflow logs](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}) for more details." \
+            --repo ${{ github.repository }}

.github/workflows/purge-aws-rds-snapshots.yaml

@@ -4,8 +4,8 @@ on:
     # Runs at 00:30 and 12:30
     - cron: "30 0,12 * * *"
 env:
-    GH_TOKEN: ${{ github.token }}
-    AWS_REGION: us-west-2
+  GH_TOKEN: ${{ github.token }}
+  AWS_REGION: us-west-2
 jobs:
   purge_rds_snapshots:
     name: Purge AWS RDS DBInstance snapshots