Server
=========

Essential server setup tasks, like sshd config, ddns cronjobs (+ mail output), etc used by Jannik Beyerstedt.


Requirements
------------

none


Role Variables
--------------

There are several variables, that should be set per host (e.g. in the inventory).

Some of the tasks listed below, will not run, if the corresponding variables are not set.
Therefore you can use the same playbook for multiple servers and activate the needed features with host variables.

### Borgbakup
If you want to configure borgbackup backups, these variables need to be set:
- `borgbackup_passphrase`: Passphrase of the borgbackup repo
- `borgbackup_repo`: Repository path (e.g. `ssh://$user@$hostname/$path`)
- `borgbackup_hostname`: Hostname to prefix the snapshots

Optional configuration:
- `borgbackup_ssh_id`: Path to the used ssh id (default: `/home/{{ ansible_user_id }}/.ssh/id_ed25519`)

Attention: You still need to setup the borgbackup repository manually.

### Caddy
Mandatory variable:
- `caddy_email`: Email address to use for getting let's encrypt certificates

### Cronmails
Mandatory variable:
- `cron_email`: Sender email address used by cron

### Docker
Optional variable:
- `dockercompose_use_pip`: boolean to use pip instead of manual download (default: false)

### DynDNS
This task and it's configuration files might be quite specific for the [davd/docker-ddns](https://github.com/dprandzioch/docker-ddns) docker container.

Mandatory variables:
- `ddns_server_domain`: Domain name of the DynDNS server
- `ddns_passphrase`: Passphrase for updating dynDNS entries
- `ddns_domain`: Domain where the host's entries are created as `$hostname.$ddns_domain`

Optional variable:
- `ddns_silence`: Set to true to silence stderr too

### Telegraf
Mandatory variables:
- `telegraf_server_url`: URL of the influxDB server, e.g. `https://example.com:8086`
- `telegraf_server_user`: Username of the influxDB user
- `telegraf_server_passwd`: Password of the influxDB user

Telegraf is configured with basic host telemetry by default. You can add more features, if you like:
- `telegraf_docker`: Set to `true`, if docker telemetry should be collected (uses file from `telegraf_docker_file`)
- `telegraf_snmp`: Set to `true`, if SNMP telemetry should be collected (uses file from `telegraf_snmp_file`)
- `telegraf_docker_file`: filename of the docker telegraf config part in `{{role_path}}/templates` (default `telegraf-docker.conf`).
- `telegraf_snmp_file`: filename of the SNMP telegraf config part in `{{role_path}}/templates` (default `telegraf-SNMP.conf`).

Optional settings:
- `telegraf_interval`: Data sampling interval (default `300s`)


Dependencies
------------

none


Example Playbook
----------------

The different tasks should be used on a case-by-case basis:
```yml
- name: Common Server Configuration
  hosts: servers
  tasks:
  - name: Servers - Generic setup tasks
    import_role:
      name: server
      tasks_from: setup
  - name: Servers - Setup cronjob mails
    import_role:
      name: server
      tasks_from: cronmails
  - name: Servers - Setup dyndns cronjob
    import_role:
      name: server
      tasks_from: dyndns
  - name: Servers - Setup monitoring
    import_role:
      name: server
      tasks_from: telegraf
  - name: Servers - Setup backups (if variables are set)
    import_role:
      name: server
      tasks_from: borgbackup

  # Docker
  - name: Servers - Install docker
    import_role:
      name: server
      tasks_from: docker
  - name: Servers - Add telegraf to docker group
    become: yes
    user:
      name: telegraf
      groups: docker
      append: yes

  # Caddy Webserver
  - name: Servers - Install and setup caddy
    import_role:
      name: server
      tasks_from: caddyserver
  - name: Servers - Start caddy service
    become: yes
    service:
      name: caddy
      enabled: yes
      state: started

  # UFW Firewall
  - name: Servers - Install UFW
    become: yes
    apt:
      name: ufw
      state: present
```


License
-------

GPLv3