만료된 AWS ACM 인증서를 정리하고 Slack 승인 필요

• •Slack Bot Token 또는 Webhook URL
• •AWS Access Key와 Secret

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        "content": "# Clean Up Expired AWS ACM Certificates with Human Approval\n> Automate the cleanup of expired AWS ACM certificates with Slack-based approval. This workflow helps maintain a secure and tidy AWS environment by detecting expired SSL certs, sending detailed Slack notifications to admins, and deleting them upon approval, ensuring full visibility and control over certificate lifecycle management.\n## 🧑‍💼 Who’s it for\n\nThis workflow is designed for:\n- **AWS administrators** who want to keep their environment clean and secure  \n- **DevOps teams** managing SSL lifecycle in AWS ACM  \n- **IT Admins** needing visibility and control over expired cert removal  \n- Teams that use **Slack for collaboration and approvals**\n\n## ⚙️ How it works / What it does\n\nThis automated workflow performs the following tasks on a **daily schedule**:\n1. **Fetch all ACM certificates** in your AWS account.\n2. **Filter out the expired ones** by comparing expiration date and status.\n3. **Send a Slack approval message** with certificate details to the admin team.\n4. **Wait for approval response** directly in Slack (`✅` to approve deletion).\n5. If approved, it **deletes the expired certificate** using AWS ACM.\n6. Finally, it **notifies the IT admin** about the action taken.\n\n## 🔧 How to set up\n\n1. **Create the Workflow**\n   - Add the nodes as shown:\n     - `Schedule Trigger`\n     - `AWS - ACM: listCertificates`\n     - `AWS - ACM: describeCertificate` (loop per cert)\n     - `IF Node` to filter expired certs\n     - `Slack - Send & Wait for Reaction`\n     - `AWS - ACM: deleteCertificate`\n     - `Slack - Post Message` to notify\n\n2. **Configure Slack**\n   - Create a **Slack Bot Token** with:\n     - `chat:write`\n     - `reactions:read`\n     - `channels:read`\n   - Connect it in your Slack nodes.\n\n3. **Configure AWS Credentials**\n   - Use IAM User or Role with:\n     - `acm:ListCertificates`\n     - `acm:DescribeCertificate`\n     - `acm:DeleteCertificate`\n\n4. **Set schedule**\n   - Daily, Weekly, or custom cron expression.\n\n## 📋 Requirements\n\n| Component         | Description                          |\n|------------------|--------------------------------------|\n| AWS ACM Access   | IAM permissions for ACM actions      |\n| Slack Bot Token  | With `chat:write` & `reactions:read` |\n| n8n Environment  | Self-hosted or n8n Cloud             |\n| Slack Channel    | Where approval messages will be sent |\n\n## 🛠️ How to customize the workflow\n\n### 🕒 Change waiting time\nAdjust the wait time before checking Slack reactions in the `sendAndWait` node (default 1 hour).\n\n### 👥 Change Slack target\nChange the Slack channel or tag specific people (`<@U123456>`).\n\n### 📓 Add logging\nAdd Google Sheets, Notion, or DynamoDB to log certificate details and approval decisions.\n\n### 🧪 Add dry-run/test mode\nUse an IF node before deletion to simulate removal when `ENV === dry-run`.\n"
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        "content": "### 1. Schedule Trigger\nThe workflow starts on a scheduled basis (e.g., daily at 09:00) to automatically check ACM certificates without manual intervention."
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        "content": "### 2. Get Certificates\nFetches all ACM certificates in the configured AWS region(s), including details such as domain names, status, and expiration dates."
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        "content": "### 3. Filter Expired Certificates Only\nChecks each certificate and keeps only those that expired already.\n\n"
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        "content": "### 4. Notify via Slack and Wait for Approval\nSends a Slack message with certificate details (domain, ARN, expiration date, status).  \nThe workflow pauses here until a user clicks **Approve** or **Reject**."
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        "content": "### 5. Delete Expired Certificate\nIf **Approve** is selected in Slack, the workflow triggers AWS ACM to delete the certificate automatically.  \nIf **Reject** is clicked, no action is taken, and the workflow ends."
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