====== UniFi Controller ======

===== Update EOL Cloud Key Gen 1 =====

The Cloud Key Gen 1 doesn't get any update via web UI anymore. To keep the controller up to date and compatible with new devices the update can be performed via SSH on the command line.

<code>
apt-get install unifi
</code>

Example:
<code>
root@UniFi-CloudKey:~# apt-get install unifi
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be upgraded:
  unifi
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 147 MB of archives.
After this operation, 22.2 MB of additional disk space will be used.
Get:1 http://www.ubnt.com/downloads/unifi/debian/ cloudkey-stable/ubiquiti unifi all 7.2.95-18699-1 [147 MB]
Fetched 147 MB in 2min 48s (873 kB/s)
Preconfiguring packages ...
(Reading database ... 26209 files and directories currently installed.)
Preparing to unpack .../unifi_7.2.95-18699-1_all.deb ...
Unpacking unifi (7.2.95-18699-1) over (6.5.54-16676-1) ...
Processing triggers for systemd (230-7~bpo8+2.ubnt+1) ...
Setting up unifi (7.2.95-18699-1) ...
</code>

It can take a couple of minutes for the controller to be available again. Wait 15 minutes before you take any troubleshooting/restore actions.

You probably want to reboot the system after you verified that the controller is up and running.
<code>
systemctl reboot
</code>

===== Change the DNS server on the Cloud Key =====

The Cloud Key uses systemd-resolved as DNS client. The change the DNS server, the file /etc/systemd/resolved.conf can be edited via SSH.

<code>
vim /etc/systemd/resolved.conf
</code>

Restart the service.
<code>
systemctl restart systemd-resolved
</code>

Check the status of systemd-resolved.
<code>
systemd-resolve --status
</code>

<code>
root@UniFi-CloudKey:~# systemd-resolve --status 
Global
          DNS Server: 192.168.1.255
          DNS Domain: int.example.org
          DNSSEC NTA: 10.in-addr.arpa
                      16.172.in-addr.arpa
                      168.192.in-addr.arpa
                      17.172.in-addr.arpa
                      18.172.in-addr.arpa
                      19.172.in-addr.arpa
                      20.172.in-addr.arpa
                      21.172.in-addr.arpa
                      22.172.in-addr.arpa
                      23.172.in-addr.arpa
                      24.172.in-addr.arpa
                      25.172.in-addr.arpa
                      26.172.in-addr.arpa
                      27.172.in-addr.arpa
                      28.172.in-addr.arpa
                      29.172.in-addr.arpa
                      30.172.in-addr.arpa
                      31.172.in-addr.arpa
                      corp
                      home
                      internal
                      intranet
                      lan
                      local
                      private
                      test

Link 7 (eth0)
      Current Scopes: DNS LLMNR/IPv4 LLMNR/IPv6
       LLMNR setting: yes
MulticastDNS setting: no
      DNSSEC setting: allow-downgrade
    DNSSEC supported: yes
          DNS Server: 192.168.1.255
...
</code>