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nixos/installer: simplify and document wifi setup

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The wpa_supplicant service in the NixOS installer is unusable because
the control socket is disabled and /etc/wpa_supplicant.conf ignored.

The manual currently recommends manually starting the daemon and using
wpa_passphrase, but this requires figuring out the interface name,
driver and only works for WPA2 personal networks.

By enabling the control socket, instead, a user can configure the
network via wpa_cli (or wpa_gui in the graphical installer), which
support more advanced network configurations.
This commit is contained in:
rnhmjoj 2021-08-14 15:35:18 +02:00
parent 5605b561ce
commit d857340c8e
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GPG key ID: BFBAF4C975F76450
2 changed files with 48 additions and 5 deletions
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47
nixos/doc/manual/installation/installing.xml
View file

@ -64,14 +64,51 @@
</para>
<para>
To manually configure the network on the graphical installer, first disable
network-manager with <command>systemctl stop NetworkManager</command>.
On the graphical installer, you can configure the network, wifi included,
through NetworkManager. Using the <command>nmtui</command> program, you
can do so even in a non-graphical session. If you prefer to configure the
network manually, disable NetworkManager with
<command>systemctl stop NetworkManager</command>.
</para>
<para>
To manually configure the wifi on the minimal installer, run
<command>wpa_supplicant -B -i interface -c &lt;(wpa_passphrase 'SSID'
'key')</command>.
On the minimal installer, NetworkManager is not available, so configuration
must be perfomed manually. To configure the wifi, first start wpa_supplicant
with <command>sudo systemctl start wpa_supplicant</command>, then run
<command>wpa_cli</command>. For most home networks, you need to type
in the following commands:
<programlisting>
<prompt>&gt; </prompt>add_network
0
<prompt>&gt; </prompt>set_network 0 ssid "myhomenetwork"
OK
<prompt>&gt; </prompt>set_network 0 psk "mypassword"
OK
<prompt>&gt; </prompt>set_network 0 key_mgmt WPA-PSK
OK
<prompt>&gt; </prompt>enable_network 0
OK
</programlisting>
For enterprise networks, for example <emphasis>eduroam</emphasis>, instead do:
<programlisting>
<prompt>&gt; </prompt>add_network
0
<prompt>&gt; </prompt>set_network 0 ssid "eduroam"
OK
<prompt>&gt; </prompt>set_network 0 identity "myname@example.com"
OK
<prompt>&gt; </prompt>set_network 0 password "mypassword"
OK
<prompt>&gt; </prompt>set_network 0 key_mgmt WPA-EAP
OK
<prompt>&gt; </prompt>enable_network 0
OK
</programlisting>
When successfully connected, you should see a line such as this one
<programlisting>
&lt;3&gt;CTRL-EVENT-CONNECTED - Connection to 32:85:ab:ef:24:5c completed [id=0 id_str=]
</programlisting>
you can now leave <command>wpa_cli</command> by typing <command>quit</command>.
</para>
<para>

6
nixos/modules/profiles/installation-device.nix
View file

@ -54,7 +54,12 @@ with lib;
An ssh daemon is running. You then must set a password
for either "root" or "nixos" with `passwd` or add an ssh key
to /home/nixos/.ssh/authorized_keys be able to login.
If you need a wireless connection, type
`sudo systemctl start wpa_supplicant` and configure a
network using `wpa_cli`. See the NixOS manual for details.
'' + optionalString config.services.xserver.enable ''
Type `sudo systemctl start display-manager' to
start the graphical user interface.
'';
@ -71,6 +76,7 @@ with lib;
# Enable wpa_supplicant, but don't start it by default.
networking.wireless.enable = mkDefault true;
networking.wireless.userControlled.enable = true;
systemd.services.wpa_supplicant.wantedBy = mkOverride 50 [];
# Tell the Nix evaluator to garbage collect more aggressively.