# Freifunk Gateway Module

Martin Schütte <info@mschuette.name>

This module tries to automate the configuration of a Freifunk (Hamburg) Gateway.
The idea is to implement the step-by-step guide on http://wiki.freifunk.net/Freifunk_Hamburg/Gateway

A generalization for other communities would be nice, but right now this is all
experimental and we will be glad when it works for our own gateways.

Also note that this is a really ugly puppet module that ignores all principles
of modularity and interoperability; instead it follows the "Big ball of mud"
design pattern.

## Open Problems

* The apt repository at http://bird.network.cz/debian/ does not use PGP
  signatures, so `bird` and `bird6` will not be installed automatically.
* Setting the hostname should occur before everything else. So either
  do that manually or run a small `ff_gw::sysadmin`-only manifest before the
  main `ff_gw` manifest.
* User root requires ssh access to the git repository
  `git@freifunk-gw01.hamburg.ccc.de:fastdkeys` --
  so create a key and have it authorized beforehand.

## Usage

Install as a puppet module, then include with node-specific parameters.

### Dependencies

Install Puppet and some required modules with:

```
apt-get install puppet git
puppet module install puppetlabs-stdlib
puppet module install puppetlabs-apt
puppet module install puppetlabs-vcsrepo
puppet module install saz-sudo
puppet module install torrancew-account
```

Then add this module (which is not in the puppet forge, so it has to be
downloaded manually):

```
cd /etc/puppet/modules
git clone https://github.com/freifunkhamburg/puppet-ff_gw.git ff_gw
```

### Parameters

Now include the module in your manifest and provide all parameters.
Basically there are three kinds of parameters: user accounts (optional if you
do manual user management), network config (has to be in sync with the wiki
page), and credentials for fastd and openvpn.


Example puppet code (save e.g. as `/etc/puppet/gw.pp`):

```

class { 'ff_gw::sysadmin':
    # both optional, used for FFHH monitoring:
    zabbixserver => 'argos.mschuette.name',
    muninserver  => '78.47.49.236',

    # optional, configure hostname and public IP
    sethostname => 'gw12.hamburg.freifunk.net',
    setip       => '5.45.105.34',

    # also optional, let puppet control user accounts:
    accounts => {
        mschuett => {
            comment => 'Martin Schuette',
            ssh_key => 'AAAAB3NzaC1yc2EAAAADAQABAAABAQC4qcAOjmLCv+DaF405K9/napCQCq8qJnTJtkbeQR+PGLHAR3kxXFh5rQXKp5n3IxEhZt4js7yin5EBmfCMv+CHYSndT4BGVDarjqIoM7RAKI8MyJUus0SOf5WsnAGamp97mCh8iWHg7v+emqYcF308FFkubKzFLdHjdLGZBCduClUvkyuuUc7vtkXZ3IkInXGkrN5hn388/lHsT1ewUva7j2fZmbVou8P2FHC4+azPInoyezwiIE6YrFKAyquDhuFRDir5QqlFaZpD6C8T+vEiqWRyqPxI7YVGBudh2oec5m99VTWkrPw7cOsC92ndLAgQ2MjxEeDhPh/Tgxly6flb',
            groups => ['sudo', 'users'],
        }
    },
}

class { 'ff_gw':
    # freifunk config
    # the network assigned to the ff community
    ff_net          => '10.112.0.0/16',
    # the network actually used in the mesh might be smaller than ff_net
    ff_mesh_net     => '10.112.0.0/18',
    # as number for icvpn peering
    ff_as           => '65112',

    # network config (example data for gw12)
    mesh_mac        => 'de:ad:be:ef:01:14',
    gw_ipv4         => '10.112.30.1',
    gw_ipv6         => 'fd51:2bb2:fd0d::501',
    dhcprange_start => '10.112.30.2',
    dhcprange_end   => '10.112.31.254',

    # secret credentials for fastd and vpn
    secret_key      => '...',
    vpn_ca_crt      => '-----BEGIN CERTIFICATE-----
MIIE ...
-----END CERTIFICATE-----',
    vpn_usr_crt     => '-----BEGIN CERTIFICATE-----
MIIE ...
-----END CERTIFICATE-----',
    vpn_usr_key     => '-----BEGIN PRIVATE KEY-----
MIIE ...
-----END PRIVATE KEY-----',
}
```

### Run Puppet

To apply the puppet manifest (e.g. saved as `gw.pp`) run:

```
puppet apply --verbose gw.pp
```

The verbose flag is optional and shows all changes.
To be even more catious you can also add the `--noop` flag to only show changes
but not apply them.