truenas-stacks/docs/operations/SECRETS_MANAGEMENT.md

Secrets Management

Overview

Secrets are managed in two layers:

1. Live secrets — .env files on PD at /mnt/docker-ssd/docker/compose/<stack>/.env, gitignored and never committed to the main repo
2. Encrypted backup — all .env files are synced to a private git-crypt encrypted Gitea repo at /mnt/docker-ssd/docker/secrets/

The sync is a one-command operation and is safe to re-run at any time.

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Principles

• .env files are gitignored in the main repo — never committed there
• .env.example files with placeholder values are committed instead
• The secrets repo encrypts everything at rest using git-crypt (symmetric key)
• Secrets are generated with standard tools, never reused across services

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Generating Secrets

# Database passwords
openssl rand -hex 24

# JWT / session secrets
openssl rand -hex 32

# API keys (where format allows)
openssl rand -base64 32

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Live .env File Locations

All .env files live alongside their docker-compose.yaml:

/mnt/docker-ssd/docker/compose/
  ai/.env
  automation/.env
  databases/.env
  dev/.env
  documents/.env
  home/.env
  infrastructure/.env
  media/.env
  media/kima-hub/.env
  mesh-mqtt-observer/.env
  meshtastic/.env
  monitoring/.env
  photos/.env

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Secrets Repo (git-crypt)

Gitea repo	https://gitea.paccoco.com/fizzlepoof/homelab-secrets (private)
SSH remote	ssh://git@10.5.1.6:2222/fizzlepoof/homelab-secrets.git
Local path on PD	/mnt/docker-ssd/docker/secrets/
Symmetric key location	/mnt/docker-ssd/docker/secrets/.git-crypt-secrets.key (if copied there) or retrieve from password manager
Key backup	Password manager + C:\Users\Fizzlepoof\Downloads\.git-crypt-secrets.key

Repo structure

Directory	Contents
env/	.env files for each stack, named <stack>.env
keys/	API keys and tokens
certs/	TLS certificates
tokens/	Service tokens (Paperless, LiteLLM, etc.)
ssh/	SSH private keys

All files except README.md and .gitattributes are encrypted by git-crypt on commit.

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Syncing .env Files to the Secrets Repo

Use the sync script — no root required, safe to re-run:

bash /mnt/docker-ssd/docker/compose/scripts/sync-envs-to-secrets.sh

What it does:

• Scans all stack directories under /mnt/docker-ssd/docker/compose/ for .env files
• Copies changed/new files to /mnt/docker-ssd/docker/secrets/env/ as <stack>.env
• Skips unchanged files
• Commits and pushes to Gitea automatically

Run this any time you create or update a stack's .env file.

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git-crypt on TrueNAS

apt is blocked on TrueNAS Scale. git-crypt is installed via Docker and stored on the persistent dataset at /mnt/docker-ssd/bin/git-crypt.

Current installation (already done on PD)

/mnt/docker-ssd/bin/git-crypt

PATH is set in /home/truenas_admin/.bashrc and /root/.bashrc:

export PATH="/mnt/docker-ssd/bin:$PATH"

Re-installing after a full rebuild

Option 1 — one-liner:

sudo -i
docker run --rm -v /tmp:/out debian:bookworm-slim \
  bash -c "apt-get update -qq && apt-get install -y -qq git-crypt && cp /usr/bin/git-crypt /out/git-crypt"
mkdir -p /mnt/docker-ssd/bin
cp /tmp/git-crypt /mnt/docker-ssd/bin/git-crypt
chmod +x /mnt/docker-ssd/bin/git-crypt
echo 'export PATH="/mnt/docker-ssd/bin:$PATH"' >> /root/.bashrc
echo 'export PATH="/mnt/docker-ssd/bin:$PATH"' >> /home/truenas_admin/.bashrc

Option 2 — via dev stack compose:

cd /mnt/docker-ssd/docker/compose/dev
sudo docker compose --profile setup up git-crypt-init
# copies git-crypt to /root/bin — then move to persistent location:
sudo cp /root/bin/git-crypt /mnt/docker-ssd/bin/git-crypt

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Unlocking the Secrets Repo on a New Machine

# Install git-crypt first (see above), then:
git clone ssh://git@10.5.1.6:2222/fizzlepoof/homelab-secrets.git /mnt/docker-ssd/docker/secrets
cd /mnt/docker-ssd/docker/secrets
git-crypt unlock /path/to/.git-crypt-secrets.key

After unlock, the env/ directory contains plaintext .env files ready to copy back into the stack directories.

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Full Rebuild Runbook

On a fresh PD after reinstalling TrueNAS:

1. Install git-crypt (Option 1 above — docker is available immediately after TrueNAS install)
2. Restore secrets repo:

   git clone ssh://git@10.5.1.6:2222/fizzlepoof/homelab-secrets.git /mnt/docker-ssd/docker/secrets
   cd /mnt/docker-ssd/docker/secrets
   git-crypt unlock /path/to/.git-crypt-secrets.key
   

3. Restore .env files from secrets/env/ back to their stack directories:

   cp /mnt/docker-ssd/docker/secrets/env/ai.env /mnt/docker-ssd/docker/compose/ai/.env
   cp /mnt/docker-ssd/docker/secrets/env/databases.env /mnt/docker-ssd/docker/compose/databases/.env
   # ... etc for each stack
   

4. Clone the main stacks repo:

   git clone ssh://git@10.5.1.6:2222/fizzlepoof/truenas-stacks.git /mnt/docker-ssd/docker/compose
   

5. Redeploy stacks per DEPLOYMENT_CHECKLIST.md

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Known Credentials Locations

Service	File
shared-postgres	databases/.env
shared-mariadb	databases/.env
OpenWebUI DB	ai/.env — user: openwebui, db: openwebui
Donetick	home/.env + selfhosted.yaml
Meshmonitor	meshtastic/.env
Gitea	dev/.env
LiteLLM	ai/.env
Paperless	documents/.env

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Security Reminders

• Key backup: C:\Users\Fizzlepoof\Downloads\.git-crypt-secrets.key — also store in password manager
• Regenerate Wings token on N.O.M.A.D. (was exposed in chat — TODO)
• Regenerate N.O.M.A.D. Newt secret (was exposed in chat — TODO)
• Disable signups in OpenWebUI after creating initial account
• The Gitea token in setup-secrets-repo.sh should be rotated after initial setup