container-tools: Host Setup
===========================


1. Debian Packages
-------------------

apt install bridge-utils ifenslave vlan


2. Boot Parameters
------------------

2.1 CGroup Memory Controller
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

In order to enable the memory controller the following boot parameter needs to be used:

	cgroup_enable=memory


2.2 CGroup Swap Controller
~~~~~~~~~~~~~~~~~~~~~~~~~~

In order to enable the swap controller the following boot parameter needs to be used:

	swapaccount=1


3. Networking
~~~~~~~~~~~~~

3.1 Enable IPv4 Forwarding
~~~~~~~~~~~~~~~~~~~~~~~~~~

apt install procps
echo "net.ipv4.ip_forward = 1" > /etc/sysctl.d/ip_foward.conf
sysctl -p


3.2 Configure Network Bridge
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

3.2.1 Bridge: 1 Interface, standalone, DHCP
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

cat > /etc/network/interfaces << EOF
# /etc/network/interfaces

source /etc/network/interfaces.d/*

auto lo
iface lo inet loopback

iface eth0 inet manual

auto br0
iface br0 inet dhcp
	bridge_ports	eth0
	bridge_fd	0
	bridge_maxwait	0
	bridge_stp	0
EOF


3.2.2 Bridge: 1 Interface, standalone, static
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

cat > /etc/network/interfaces << EOF
# /etc/network/interfaces

source /etc/network/interfaces.d/*

auto lo
iface lo inet loopback

iface eth0 inet manual

auto br0
iface br0 inet static
	address		10.0.0.2
	gateway		10.0.0.1
	netmask		255.255.255.0

	pre-up		ifconfig eth0 down
	pre-up		ifconfig eth0 up

	bridge_ports	eth0
	bridge_fd	0
	bridge_maxwait	0
	bridge_stp	0
EOF


3.2.3 Bridge: 2 logical Interfaces, subnet, static
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

cat > /etc/network/interfaces << EOF
# /etc/network/interfaces

source /etc/network/interfaces.d/*

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

auto br0
iface br0 inet static
	address		10.0.0.1
	netmask		255.255.255.0

	pre-up		brctl addbr br0
	post-down	brctl delbr br0

	bridge_fd	0
	bridge_maxwait	0
	bridge_stp	0
EOF


3.2.4 Bridge: 3 physical Interfaces, vlan, bonding, static
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

cat > /etc/network/interfaces << EOF
# /etc/network/interfaces

source /etc/network/interfaces.d/*

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

iface eth1 inet manual

iface eth2 inet manual

auto bond0
iface bond0 inet manual
	up			ifconfig bond0 0.0.0.0 up
	down			ifconfig bond0 down

	slaves			eth1 eth2

	bond-mode		4
	bond-miimon		100
	bond-downdelay		200
	bond-updelay		200
	bond-lacp-rate		1
	bond-xmit-hash-policy	layer2+3

iface bond0.100 inet manual
	vlan-raw-device bond0

auto br100
iface br100 inet static
	address			10.100.0.2
	#gateway		10.100.0.1
	netmask			255.255.255.0

	post-up			ip route add 10.100.0.0/24 via 10.100.0.1 dev br100
	post-down		ip route del 10.100.0.0/24 dev br100

	bridge_ports		bond0.100
	bridge_fd		0
	bridge_maxwait		0
	bridge_stp		0
EOF


4. Enabling container-shell
---------------------------

Managing containers requires root privileges. In order to allow unprivileged
users to manage containers without granting them privileges or accounts,
the container-shell can be used together with sudo and a container user.

  sudo adduser --gecos "container-tools,,," \
	--home /var/lib/machines/container-tools \
	--shell /usr/bin/container-shell \
	--no-create-home container
