## Install Ubuntu containers on Archlinux using LXC

Install the _lxc_ and the _debootstrap_ packages:
```
# pacman -Sy lxc debootstrap 
```

### Install an Ubuntu container

I will install Ubuntu 14.04 LTS. Therfore, I will use the _trusty_ release.
If you want to install Ubuntu 12.04 LTS, use the _precise_ release.

I create an LXC container named _ubuntu-14_ with the release _trusty_ and the architecture _amd64_:
```
# lxc-create --name=ubuntu-14 --template=ubuntu -- --release trusty --arch amd64
```
### Setup the network

Install the _libvirt_ package because we need the _virsh_ program.
Also, we will need _ebtables_ and _dnsmasq_ for the default NAT/DHCP networking. [(*)](https://wiki.archlinux.org/index.php/libvirt#Server)
```
# pacman -Sy libvirt ebtables dnsmasq
```
Start and enable the _libvirtd_ daemon.
```
# systemctl start libvirtd
# systemctl enable libvirtd
```

Print the virtual network configuration _default_ provided by _libvirtd_.
```xml
# virsh net-dumpxml default
<network>
  <name>default</name>
  <uuid>f9f9128b-8183-4c2c-af56-23cd52100d3a</uuid>
  <forward mode='nat'/>
  <bridge name='virbr0' stp='on' delay='0'/>
  <mac address='52:54:00:8d:ea:7f'/>
  <ip address='192.168.122.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='192.168.122.2' end='192.168.122.254'/>
    </dhcp>
  </ip>
</network>
```

Edit the file /var/lib/lxc/ubuntu-14/config to set-up the network configuration of the container:
```
lxc.net.0.type = veth
lxc.net.0.flags = up
lxc.net.0.name = eth0
lxc.net.0.link = virbr0
```

Setup the _virb0_ interface:
```
# virsh net-start default
```

### Start the Ubuntu container

Start the Ubuntu container as follow:
```
# lxc-start --name ubuntu-14
```
Get the IP of the Ubuntu container:
```
# lxc-ls -f ubuntu-14 -F IPV4
```
You can stop the Ubuntu container as follow:
```
# lxc-stop --name ubuntu-14
```

### Set a static IP for the container

Edit the default virtual network provided by _libvirtd_ to restrict the DHCP range
from 192.168.122.2-192.168.122.254 to 192.168.122.10-192.122.254.
 
```
# virsh net-edit default
```
as follow:
```xml
<network>
  <name>default</name>
  <uuid>bd881c3e-406f-40bb-84ed-b09e68f210e2</uuid>
  <forward mode='nat'/>
  <bridge name='virbr0' stp='on' delay='0'/>
  <mac address='52:54:00:2d:23:30'/>
  <ip address='192.168.122.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='192.168.122.10' end='192.168.122.254'/>
    </dhcp>
  </ip>
</network>
```

Restart the _libvirtd_ daemon:
```
# systemctl restart libvirtd
```

Stop the the _trusty_ container: 
```
# lxc-stop --name ubuntu-14
```

Add the following line in the file /var/lib/lxc/ubuntu-14/config:
```
lxc.net.0.ipv4.address = 192.168.122.2/24
```

Restart the _ubuntu-14_ container.

### Connect to the container
```
# ssh ubuntu@192.168.122.2
```

Use the password _ubuntu_ to connect.