refactor: 다운타임 줄이기 위해 트래픽을 점진적으로 전환

kakao-tech-campus-2nd-step3 · Nov 2, 2024 · 8f722b3 · 8f722b3
1 parent 515c0a4
commit 8f722b3
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Showing 2 changed files with 56 additions and 6 deletions.
diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
@@ -160,15 +160,65 @@ jobs:
           username: ubuntu
           key: ${{ secrets.EC2_SSH_KEY }}
           script: |
-            CURRENT_VERSION=${{ env.CURRENT_VERSION }}
+            CURRENT_VERSION=${CURRENT_VERSION}
             
             if [ "$CURRENT_VERSION" == "blue" ]; then
-              TARGET_GROUP_ARN="arn:aws:elasticloadbalancing:ap-northeast-2:${{ secrets.AWS_ACCOUNT_ID }}:targetgroup/splanet-8081/${{ secrets.ARN_ID_8081 }}"
+              OLD_TARGET_GROUP_ARN="arn:aws:elasticloadbalancing:ap-northeast-2:${{ secrets.AWS_ACCOUNT_ID }}:targetgroup/splanet-blue/${{ secrets.ARN_ID_BLUE }}"
+              NEW_TARGET_GROUP_ARN="arn:aws:elasticloadbalancing:ap-northeast-2:${{ secrets.AWS_ACCOUNT_ID }}:targetgroup/splanet-green/${{ secrets.ARN_ID_GREEN }}"
             else
-              TARGET_GROUP_ARN="arn:aws:elasticloadbalancing:ap-northeast-2:${{ secrets.AWS_ACCOUNT_ID }}:targetgroup/splanet/${{ secrets.ARN_ID_8080 }}"
+              OLD_TARGET_GROUP_ARN="arn:aws:elasticloadbalancing:ap-northeast-2:${{ secrets.AWS_ACCOUNT_ID }}:targetgroup/splanet-green/${{ secrets.ARN_ID_GREEN }}"
+              NEW_TARGET_GROUP_ARN="arn:aws:elasticloadbalancing:ap-northeast-2:${{ secrets.AWS_ACCOUNT_ID }}:targetgroup/splanet-blue/${{ secrets.ARN_ID_BLUE }}"
             fi
-            aws elbv2 modify-listener --listener-arn arn:aws:elasticloadbalancing:ap-northeast-2:${{ secrets.AWS_ACCOUNT_ID }}:listener/app/splanet/${{ secrets.ARN_ID_443 }} \
-              --default-actions Type=forward,TargetGroupArn=$TARGET_GROUP_ARN
+
+            LISTENER_ARN="arn:aws:elasticloadbalancing:ap-northeast-2:${{ secrets.AWS_ACCOUNT_ID }}:listener/app/splanet/${{ secrets.ARN_ID_443 }}"
+
+            # Step 1: Add new target group with weight 0
+            aws elbv2 modify-listener --listener-arn $LISTENER_ARN \
+              --default-actions Type=forward,ForwardConfig='{
+                "TargetGroups": [
+                  {
+                    "TargetGroupArn": "'"$OLD_TARGET_GROUP_ARN"'",
+                    "Weight": 100
+                  },
+                  {
+                    "TargetGroupArn": "'"$NEW_TARGET_GROUP_ARN"'",
+                    "Weight": 0
+                  }
+                ]
+              }'
+            echo "Added new target group with weight 0"
+
+            # Step 2: Gradually shift traffic
+            for weight in {10..100..10}; do
+              aws elbv2 modify-listener --listener-arn $LISTENER_ARN \
+                --default-actions Type=forward,ForwardConfig='{
+                  "TargetGroups": [
+                    {
+                      "TargetGroupArn": "'"$OLD_TARGET_GROUP_ARN"'",
+                      "Weight": '"$((100 - weight))"'
+                    },
+                    {
+                      "TargetGroupArn": "'"$NEW_TARGET_GROUP_ARN"'",
+                      "Weight": '"$weight"'
+                    }
+                  ]
+                }'
+              echo "Shifted traffic to new target group with weight $weight%"
+              sleep 10
+            done
+
+            # Step 3: Remove old target group by setting its weight to 0
+            aws elbv2 modify-listener --listener-arn $LISTENER_ARN \
+              --default-actions Type=forward,ForwardConfig='{
+                "TargetGroups": [
+                  {
+                    "TargetGroupArn": "'"$NEW_TARGET_GROUP_ARN"'",
+                    "Weight": 100
+                  }
+                ]
+              }'
+            echo "Switched all traffic to the new target group"
+      
 
       - name: Remove Old Version
         uses: appleboy/[email protected]

diff --git a/src/main/java/com/splanet/splanet/config/SwaggerConfig.java b/src/main/java/com/splanet/splanet/config/SwaggerConfig.java
@@ -47,7 +47,7 @@ public OpenAPI openAPI() {
     private Info apiInfo() {
         return new Info()
                 .title("Splanet")
-                .description("Splanet의 API 문서 (Version : Green)")
+                .description("Splanet의 API 문서")
                 .version("1.0.0");
     }
 }