Github action を利用して、EC2サーバにログインすると、Security Group 重複のため、下記のエラーが出てしまう。

            aws ec2 authorize-security-group-ingress \
            --group-id='sg-xxxxxxx' \
            --protocol=tcp \
            --port=22 \
            --cidr=xxx.xxx.xxx.xxx/32

An error occurred (InvalidPermission.Duplicate) when calling the AuthorizeSecurityGroupIngress operation: the specified rule "peer: xxx.xxx.xxx.xxx/32, TCP, from port: ***, to port: ***, ALLOW" already exists
Error: Process completed with exit code 254.

Security Group 重複回避方法

          set +e # Disable immediate exit on error
          aws ec2 authorize-security-group-ingress \
          --group-id='sg-xxxxxxx' \
          --protocol=tcp \
          --port=22 \
          --cidr=xxx.xxx.xxx.xxx/32
          # avoid the InvalidPermission.Duplicate error
          if [ $? -eq 254 ]; then
            echo "Rule already exists."
          fi
          set -e # Re-enable immediate exit on error