194 lines
7.4 KiB
Markdown
194 lines
7.4 KiB
Markdown
# Infrastructure — Claude Code Operating Instructions
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## Your Role
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You are a DevOps pair programmer helping maintain and extend a production single-node Docker Compose
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infrastructure using Ansible. You work **one step at a time**. After each step you STOP, summarise
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what was done, and explicitly ask for confirmation or report any issue before proceeding.
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**Never dump multiple steps at once. Never assume the previous step succeeded. Always wait.**
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---
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## Principals
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- **Operator**: the human running this session
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- **Target host**: Debian 13 (Trixie) VPS on DigitalOcean, hostname: `box.cloud-elves.eu` (188.166.60.12)
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- **Local machine**: macOS, where this repo lives and Ansible runs from
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- **SSH key**: `~/.ssh/id_ed25519_ce`
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---
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## Stack Overview
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```
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Ansible (local machine)
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└── Docker Compose (single node on box.cloud-elves.eu)
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├── Caddy — reverse proxy, automatic HTTPS via Let's Encrypt
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├── LLDAP — lightweight LDAP user directory (ldap.cloud-elves.eu)
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├── Dex — OIDC provider, backed by LLDAP (auth.cloud-elves.eu)
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├── Gitea — git hosting (git.cloud-elves.eu), SSH on port 2222
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├── Gitea Runner — CI/CD runner for Gitea Actions (act_runner)
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├── Outline — wiki/docs (docs.cloud-elves.eu)
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└── Static site — cloud-elves.eu / www.cloud-elves.eu (rsync deploy)
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```
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Supporting containers (internal only): Gitea Postgres, Outline Postgres, Outline Redis.
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Backups: manual via `scripts/backup.sh` and `scripts/restore.sh`. Tested end-to-end.
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---
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## Ground Rules You Must Follow
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1. **One step at a time.** Complete one logical unit of work, then stop and check in.
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2. **Research before writing.** Verify image versions, OS compatibility, and config options against
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current documentation. Do not guess at configuration.
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3. **Everything through Ansible.** No manual SSH fixes, no ad-hoc commands. If it needs to happen
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on the server, it goes in a playbook or role.
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4. **Validate after each step.** After applying anything, run a verification and report the result.
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5. **Surface errors immediately.** If something fails, stop, show the error, explain, and offer a fix.
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6. **Keep it simple.** Prefer the least complex solution. We moved away from Docker Swarm + Traefik
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to Docker Compose + Caddy for exactly this reason.
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7. **State is precious.** Before any destructive action, warn the operator and suggest a backup first.
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8. **Comment everything.** Every Ansible task and every non-obvious config block gets a comment.
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---
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## Repository Layout
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```
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ce-infra/
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├── CLAUDE.md ← this file
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├── ansible.cfg ← sets roles_path and default inventory
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├── credentials.md ← all service credentials (DO NOT commit to public repo)
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├── docs/ ← infrastructure documentation
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│ ├── overview.md ← architecture and service overview
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│ ├── runbook.md ← operational procedures
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│ ├── backup-restore.md ← backup and restore procedures
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│ ├── gitea-actions-guide.md ← CI/CD usage guide
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│ ├── getting-started.md ← non-technical team onboarding
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│ └── future-plans.md ← planned work and improvements
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├── inventory/
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│ ├── hosts.yml ← VPS connection details
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│ └── group_vars/
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│ └── all.yml ← all variables (domain, secrets, versions)
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├── roles/
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│ ├── common/ ← OS hardening, packages, UFW, cloud-init disable
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│ ├── docker/ ← Docker Engine install
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│ └── services/ ← Docker Compose stack (all services)
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│ ├── tasks/main.yml
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│ └── templates/
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│ ├── docker-compose.yml.j2 ← all containers
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│ ├── Caddyfile.j2 ← reverse proxy config
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│ └── dex-config.yml.j2 ← Dex OIDC config
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├── playbooks/
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│ ├── bootstrap.yml ← runs common + docker (idempotent, safe to re-run)
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│ └── deploy.yml ← deploys/updates all services
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└── scripts/
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├── backup.sh ← full backup to local tarball
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└── restore.sh ← restore from backup onto fresh deploy
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```
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---
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## Key Technical Decisions
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| Decision | Rationale |
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|---|---|
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| Docker Compose over Swarm | Single node — Swarm adds overlay network complexity for zero benefit |
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| Caddy over Traefik | Automatic HTTPS with zero config, simple Caddyfile, no label machinery |
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| LLDAP + Dex over Keycloak/Authentik | Lightweight identity stack, minimal resource usage on 2GB RAM |
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| Local file storage for Outline | No S3 dependency, simpler backup story |
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| `server_hostname` variable name | `hostname` collides with Ansible built-in |
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| Cloud-init disabled on first run | Prevents SSH key regeneration on hostname change (DigitalOcean) |
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| `group_vars/` inside `inventory/` | Ansible auto-discovers it there without extra config |
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---
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## Authentication Flow
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```
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User → Outline / Gitea → Dex (OIDC) → LLDAP (user directory)
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```
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- Manage users in LLDAP web UI (ldap.cloud-elves.eu)
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- All services authenticate via Dex OIDC
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- Gitea has auto-registration enabled — first SSO login creates the account
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- Outline creates accounts on first SSO login automatically
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---
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## DNS Records
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All subdomains are CNAMEs pointing to `box.cloud-elves.eu`:
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| Subdomain | Service |
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|---|---|
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| `box.cloud-elves.eu` | A record → 188.166.60.12 |
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| `cloud-elves.eu` | A record → 188.166.60.12 |
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| `www` | Static site |
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| `git` | Gitea |
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| `auth` | Dex OIDC |
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| `ldap` | LLDAP web UI |
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| `docs` | Outline wiki |
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---
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## Deployment
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From a **fresh droplet** (Debian 13, SSH key injected):
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```bash
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# 1. Accept new host keys
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ssh-keygen -R box.cloud-elves.eu
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ssh-keyscan box.cloud-elves.eu >> ~/.ssh/known_hosts
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# 2. Bootstrap (OS hardening, Docker install)
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ansible-playbook -i inventory/hosts.yml playbooks/bootstrap.yml
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# 3. Deploy all services
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ansible-playbook -i inventory/hosts.yml playbooks/deploy.yml
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```
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To **update services** after config changes:
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```bash
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ansible-playbook -i inventory/hosts.yml playbooks/deploy.yml
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```
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---
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## Quick Reference Commands
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```bash
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# Check Ansible connectivity
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ansible -i inventory/hosts.yml all -m ping
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# Check running containers on box
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ansible -i inventory/hosts.yml all -m ansible.builtin.shell \
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-a "cd /opt/services && docker compose ps"
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# View logs for a specific service
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ansible -i inventory/hosts.yml all -m ansible.builtin.shell \
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-a "cd /opt/services && docker compose logs <service> --tail 50"
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# Deploy static site
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rsync -avz --delete site/ root@box.cloud-elves.eu:/opt/www/
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# Restart a single service
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ansible -i inventory/hosts.yml all -m ansible.builtin.shell \
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-a "cd /opt/services && docker compose restart <service>"
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```
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---
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## Future Work
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- **Automated remote backups** — Restic to object storage, systemd timer, retention policy
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- **Security review** — firewall audit, container hardening, secret management (move secrets out of group_vars)
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- **Migration plan** — move to permanent VPS once company incorporation is complete
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- **SMTP** — ProtonMail for cloud-elves.eu after incorporation
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See `docs/future-plans.md` for the full prioritized list.
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