69 lines
2.7 KiB
Markdown
69 lines
2.7 KiB
Markdown
# Fleet Secret Rotation
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Issue: `timmy-home#694`
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This runbook adds a single place to rotate fleet API keys, service tokens, and SSH authorized keys without hand-editing remote hosts.
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## Files
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- `ansible/inventory/hosts.ini` — fleet hosts (`ezra`, `bezalel`)
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- `ansible/inventory/group_vars/fleet.yml` — non-secret per-host targets (env file, services, authorized_keys path)
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- `ansible/inventory/group_vars/fleet_secrets.vault.yml` — vaulted `fleet_secret_bundle`
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- `ansible/playbooks/rotate_fleet_secrets.yml` — staged rotation + restart verification + rollback
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## Secret inventory shape
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`fleet_secret_bundle` is keyed by host. Each host carries the env secrets to rewrite plus the full `authorized_keys` payload to distribute.
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```yaml
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fleet_secret_bundle:
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ezra:
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env:
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GITEA_TOKEN: !vault |
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...
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TELEGRAM_BOT_TOKEN: !vault |
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...
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PRIMARY_MODEL_API_KEY: !vault |
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...
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ssh_authorized_keys: !vault |
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...
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```
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The committed vault file contains placeholder encrypted values only. Replace them with real rotated material before production use.
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## Rotate a new bundle
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From repo root:
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```bash
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cd ansible
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ansible-vault edit inventory/group_vars/fleet_secrets.vault.yml
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ansible-playbook -i inventory/hosts.ini playbooks/rotate_fleet_secrets.yml --ask-vault-pass
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```
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Or update one value at a time with `ansible-vault encrypt_string` and paste it into `fleet_secret_bundle`.
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## What the playbook does
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1. Validates that each host has a secret bundle and target metadata.
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2. Writes rollback snapshots under `/var/lib/timmy/secret-rotations/<rotation_id>/<host>/`.
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3. Stages a candidate `.env` file and candidate `authorized_keys` file before promotion.
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4. Promotes staged files into place.
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5. Restarts every declared dependent service.
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6. Verifies each service with `systemctl is-active`.
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7. If anything fails, restores the previous `.env` and `authorized_keys`, restarts services again, and aborts the run.
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## Rollback semantics
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Rollback is host-safe and automatic inside the playbook `rescue:` block.
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- Existing `.env` and `authorized_keys` files are restored from backup when they existed before rotation.
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- Newly created files are removed if the host had no prior version.
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- Service restart is retried after rollback so the node returns to the last-known-good bundle.
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## Operational notes
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- Keep `required_env_keys` in `ansible/inventory/group_vars/fleet.yml` aligned with each house's real runtime contract.
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- `ssh_authorized_keys` distributes public keys only. Rotate corresponding private keys out-of-band, then publish the new authorized key list through the vault.
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- Use one vault edit per rotation window so API keys, bot tokens, and SSH access move together.
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