infrastructure/README.md

deuxfleurs.fr
=============

*Many things are still missing here, including a proper documentation. Please stay nice, it is a volunter project. Feel free to open pull/merge requests to improve it. Thanks.*

## Our abstraction stack

We try to build a generic abstraction stack between our different resources (CPU, RAM, disk, etc.) and our services (Chat, Storage, etc.), we develop our own tools when needed:

  * **[garage](https://git.deuxfleurs.fr/Deuxfleurs/garage/):** S3-compatible lightweight object store for self-hosted geo-distributed deployments (we also have a legacy glusterfs cluster)
  * **[diplonat](https://git.deuxfleurs.fr/Deuxfleurs/diplonat):** network automation (firewalling, upnp igd)
  * **[bottin](https://git.deuxfleurs.fr/Deuxfleurs/bottin):** authentication and authorization (LDAP protocol, consul backend)
  * **[guichet](https://git.deuxfleurs.fr/Deuxfleurs/guichet):** a dashboard for our users and administrators
  * **ansible:** physical node configuration
  * **nomad:** schedule containers and handle their lifecycle
  * **consul:** distributed key value store + lock + service discovery
  * **stolon + postgresql:** distributed relational database
  * **docker:** package, distribute and isolate applications

Some services we provide:

  * **Websites:** garage (static) + fediverse blog (plume)
  * **Chat:** Synapse + Element Web (Matrix protocol)
  * **Email:** Postfix SMTP + Dovecot IMAP + opendkim DKIM + Sogo webmail (legacy) | Alps webmail (experimental)
  * **Storage:** Seafile (legacy) | Nextcloud (experimental)
  * **Visio:** Jitsi

As a generic abstraction is provided, deploying new services should be easy.

## I am lost, how this repo works?

To ease the development, we make the choice of a fully integrated environment

  1. `os` the base os for the cluster
      1. `build`: where you will build our OS image based on Debian that you will install on your server
      2. `config`: our Ansible recipes to configure and update your freshly installed server
  2. `apps` apps we deploy on the cluster
      1. `build`: our Docker files to build immutable images of our applications
      2. `integration`: Our Docker compose files to test locally how our built images interact together
      3. `config`: Files containing application configurations to be deployed on Consul Key Value Store
      4. `deployment`: Files containing application definitions to be deployed on Nomad Scheduler
  3. `op_guide`: Guides to explain you operations you can do cluster wide (like configuring postgres)


## Start hacking

### Deploying/Updating new services is done from your machine

*The following instructions are provided for ops that already have access to the servers (meaning: their SSH public key is known by the cluster).*

Deploy Nomad on your machine:

```bash
export NOMAD_VER=1.0.1
wget https://releases.hashicorp.com/nomad/${NOMAD_VER}/nomad_${NOMAD_VER}_linux_amd64.zip
unzip nomad_${NOMAD_VER}_linux_amd64.zip
sudo mv nomad /usr/local/bin
rm nomad_${NOMAD_VER}_linux_amd64.zip
```

Deploy Consul on your machine:

```bash
export CONSUL_VER=1.9.0
wget https://releases.hashicorp.com/consul/${CONSUL_VER}/consul_${CONSUL_VER}_linux_amd64.zip
unzip consul_${CONSUL_VER}_linux_amd64.zip
sudo mv consul /usr/local/bin
rm consul_${CONSUL_VER}_linux_amd64.zip
```

Create an alias (and put it in your `.bashrc`) to bind APIs on your machine:

```
alias bind_df="ssh \
  -p110 \
  -N \
  -L 1389:bottin2.service.2.cluster.deuxfleurs.fr:389 \
  -L 4646:127.0.0.1:4646 \
  -L 5432:psql-proxy.service.2.cluster.deuxfleurs.fr:5432 \
  -L 8082:traefik-admin.service.2.cluster.deuxfleurs.fr:8082 \
  -L 8500:127.0.0.1:8500 \
  <a server from the cluster>"
```

and run: 

    bind_df

Adrien uses `.ssh/config` configuration instead. I works basically the same. Here it goes:

```
# in ~/.ssh/config 

Host deuxfleurs
    User adrien
    Hostname deuxfleurs.fr
    # If you don't use the default ~/.ssh/id_rsa to connect to Deuxfleurs
    IdentityFile <some_key_path>
    PubKeyAuthentication yes
    ForwardAgent No
    LocalForward 1389 bottin2.service.2.cluster.deuxfleurs.fr:389
    LocalForward 4646 127.0.0.1:4646
    LocalForward 5432 psql-proxy.service.2.cluster.deuxfleurs.fr:5432
    LocalForward 8082 traefik-admin.service.2.cluster.deuxfleurs.fr:8082
    LocalForward 8500 127.0.0.1:8500
```

Now, to connect, do the following:

    ssh deuxfleurs -N 

## Test cluster

Configured machines available for testing are listed in the **[`test_cluster` Ansible inventory](./os/config/test_cluster.inventory.yml)**.