ansible for Project Segfault nodes
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README.md

Project Segfault Ansible (Production)

These are the ansible configs used in production on Project Segfault servers.

We have 2 different playbooks, one for setting up the basic things every one of our servers needs, and one for managing docker and caddy for our geographic nodes (mostly Privacy Frontends)

The configs/compose files for the Privacy Frontends are included here as well.

All files under this repo are licensed under the GPLv3, unless specified otherwise.

Running Playbook(s)

Firstly, you need to install dependencies, which can be done with the following:

ansible-galaxy install -r requirements.yml -p roles/galaxy/ --force

Then, you can run the all playbook as such

ansible-playbook all/playbook.yaml # Initialize

For Privacy Frontends playbook, you need access to the ansible vault password, which you'll have if you are a segfault sysadmin :)

ansible-playbook -i inventory.yml -e @secrets.yaml --ask-vault-pass privfrontends/playbook.yaml

Additionally, you can make use of the following ansible tags:

  • caddy-non-update - update Caddy configs but don't update caddy itself
  • docker - run docker compose stuff
  • cron - setup cronjobs for hourly restarts

Tags can be used with the following syntax: --tag tag1,tag2,tag3

Ansible Vaults

Many parts of our privacy frontends configurations are meant to be private, such as HMAC keys and database passwords.

Hence, these are stored as variables using ansible-vault.

There are two different ansible-vaults in use in our setup, encrypted host_vars files per-host, and a global secrets.yaml.

secrets.yaml

/secrets.yaml contains private variables that are same for all our servers. Currently, it contains the following: (as of 9/6/23)

  • rfc2136_key - RFC2136 key for DNS01
  • watchtower_mtrx_pass - Watchtower Matrix password

host_vars

host_vars are dynamic variables that can be different for each host. We have two encrypted host_vars files in our setup, one for the services, and one for healthchecks on cronjobs.

healthchecks.yaml (as of 9/6/23)

  • invidious_hc_uuid - UUID for invidious hourly restart
  • teddit_hc_uuid - UUID for teddit hourly restart

privfrontends_secrets.yaml (as of 9/6/23)

  • scribe_secret_key_base
  • nitter_hmac_key
  • librarian_auth_token
  • librarian_hmac_key
  • searxng_secret_key
  • anonymousoverflow_signing_secret

Playbooks

all

The all playbook contains the basics needed for every server on our infrastructure. As of 9/6/23, it does the following:

  • Installs vim, curl, wget, sudo, netstat, nmap, pip, chrony (ntp), vnstat (bw monitoring)
  • Enables systemd services for VNStat and Chrony
  • Adds bash configuration
  • Creates users for the sysadmins and adds their ssh keys to it
  • Allows sudo without password
  • Adds an extra authorized_key on Soleil Levant servers for sshpiper
  • Adds custom sshd configuration

privfrontends

Our Geographic Privacy Frontends nodes are managed with this playbook. As of 9/6/23, it does the following:

  • Uses the caddy-ansible role to setup a caddy instance with the rfc2136 plugin added
  • Copies per-server extras files
  • Sets up the privacy frontends from a pre-defined list (it does ignore if there isnt any config change however to make sure its not extremely slow)
  • Restart certain services every hour since they aren't very stable

Adding new services

Firstly, add the thing to docker_services array/var in /privfrontends/playbook.yaml. This list MUST be maintaind in alphabetical order for ease of maintanence.

Then, create the /compose/SERVICE_NAME directory and add the compose file (compose.yml.j2) to the same. You can use the {{inventory_hostname}} variables where required.

If the service needs a secret key, add it to the ansible-vault secrets.yaml with ansible-vault edit secrets.yaml. If you are a Project Segfault sysadmin you already have the password for it :P

Past this, Caddy needs to be configured.

The common GeoDNS configuration can be done following this format

SERVICE_NAME.{{inventory_hostname}}.projectsegfau.lt SERVICE_NAME.projectsegfau.lt SERVICE_SHORT_NAME.psf.lt SERVICE_SHORT_NAME.{{inventory_hostname}}.psf.lt {
        reverse_proxy :PORT
        import def
		import torloc SERVICE_NAME
}

To setup TOR, you have to add the following to privfrontends/templates/eu/darknet.Caddy

http://SERVICE_NAME.pjsfkvpxlinjamtawaksbnnaqs2fc2mtvmozrzckxh7f3kis6yea25ad.onion {
	import tor SERVICE_NAME
	reverse_proxy :PORT
}

Past this, you can run the deployment as outlined in the beginning.

Please inform me (Arya) if any part of this documentation isn't clear, I suck at writing documentation.