AWS ACM 인증서 자동 갱신 (Slack 승인 포함)

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

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        "content": "# AWS ACM Certificate Auto-Renew with Slack approval\n\n## **Who’s it for**\n- SRE/DevOps teams managing many ACM certs.\n- Cloud ops who want **hands-off renewals** with an **approval step in Slack**.\n- MSPs that need auditable reminders and renewals on schedule.\n\n## **How it works / What it does**\n1. **Schedule Trigger** – runs daily (or your cadence).\n2. **Get many certificates** – fetches ACM certs (paginate if needed).\n3. **Filter: expiring in next 7 days** – keeps items where:\n   - `NotAfter` **before** `today + 7d`\n   - `NotBefore` **before** `today` (already valid)\n4. **Send message and wait for response (Slack)** – posts a certificate summary and **pauses** until Approve/Reject.\n5. **Renew a certificate** – on **Approve**, calls the renew action for the item.\n\n## **How to set up**\n1. **Credentials**\n   - **AWS** in n8n with permissions to list/read/renew certs.\n   - **Slack** OAuth (bot in the target channel).  \n2. **Schedule Trigger**\n   - Set to run once per day (e.g., `09:00` local).\n3. **Get many certificates**\n   - Region: your ACM region(s).  \n   - If you have several regions, loop regions or run multiple branches.\n4. **Filter (IF / Filter node)**\n   - Add these two conditions (AND):\n     - `{{ $json.NotAfter.toDateTime('s') }}` **is before** `{{ $today.plus(7,'days') }}`\n     - `{{ $json.NotBefore.toDateTime('s') }}` **is before** `{{ $today }}`\n5. **Slack → Send & Wait**\n   - Message (text input):\n     ```\n     :warning: *ACM Certificate Expiry Alert* :warning:\n\n     *Domain:* {{ $json.DomainName }}\n     *SANs:* {{ $json.SubjectAlternativeNameSummaries }}\n     *ARN:* {{ $json.CertificateArn }}\n     *Algo:* {{ $json.KeyAlgorithm }}\n     *Status:* {{ $json.Status }}\n     *Issued:* {{ $json.IssuedAt | toDate | formatDate(\"YYYY-MM-DD HH:mm\") }}\n     *Expires:* {{ $json.NotAfter | toDate | formatDate(\"YYYY-MM-DD HH:mm\") }}\n\n     Approve to start renewal.\n     ```\n   - Add two buttons: **Approve** / **Reject** (the node will output which was clicked).\n6. **Renew a certificate**\n   - Map the **CertificateArn** from the Slack Approved branch.\n\n## **Requirements**\n- n8n (current version with Slack *Send & Wait*).\n- AWS IAM permissions (read + renew ACM), e.g.:\n  - `acm:ListCertificates`, `acm:DescribeCertificate`, `acm:RenewCertificate` (plus region access).\n- Slack bot with permission to post & use interactivity in the target channel.\n\n## **How to customize the workflow**\n- **Window size:** change `7` to `14` or `30` days in the filter.\n- **Catch expired**: add an OR path `{{ $json.NotAfter.toDateTime('s') }} is before {{ $today }}` → send a **red** Slack alert.\n- **Auto-renew w/o approval:** bypass Slack and renew directly for low-risk domains.\n- **Multiple regions/accounts:** iterate over a list of regions or assume roles per account.\n- **Logging:** add a Google Sheet/DB append after Slack click with `user`, `time`, `result`.\n- **Escalation:** if no Slack response after N hours, ping `@oncall` or open a ticket.\n\n## **Notes**\n- The Slack node **pauses** execution until a button is clicked—perfect for change control.\n- Time conversions above assume `NotAfter`/`IssuedAt` are Unix seconds (`'s'`). Adjust if your data differs."
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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 Certificates Expiring Soon\nChecks each certificate and keeps only those that are already valid and will expire within the next 7 days.\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. Renew Certificate\nIf **Approve** is selected in Slack, the workflow triggers AWS ACM to renew the certificate automatically.  \nIf **Reject** is clicked, no action is taken, and the workflow ends."
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        "text": "=:white_check_mark: *ACM Certificate Renewed Successfully*\n\n*Domain:* {{ $('Cert expire in next 7 days?').item.json.DomainName }}\n*ARN:* {{ $('Cert expire in next 7 days?').item.json.CertificateArn }}\n*Previous Expiry:* {{ $('Cert expire in next 7 days?').item.json.NotAfter.toDateTime('s') }}\n*Renewed At:* {{ $now }}\n\nApproved by: {{ $('Send message and wait for response').item.json.user?.name || $('Send message and wait for response').item.json.username || 'N/A' }}",
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        "content": "### 6. Notify admin via Slack"
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