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compute-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
2.3 vsyscall
~~~~~~~~~~~~
In order to be able to execute binaries linked to older libc versions
(<= wheezy) newer linux versions (>= buster), add the following boot parameter
(see #881813 for more information):
vsyscall=emulate
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 eno1 inet manual
allow-hotplug bridge0
iface bridge0 inet dhcp
bridge_ports eno1
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 eno1 inet manual
allow-hotplug bridge0
iface bridge0 inet static
address 10.0.0.2
gateway 10.0.0.1
netmask 255.255.255.0
pre-up ip link set eno1 down
pre-up ip link set eno1 up
bridge_ports eno1
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
allow-hotplug eno1
iface eno1 inet dhcp
allow-hotplug bridge0
iface bridge0 inet static
address 10.0.0.1
netmask 255.255.255.0
pre-up ip link add name bridge0 type bridge
post-down ip link delete bridge0 type bridge
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
allow-hotplug eno1
iface eno1 inet dhcp
iface eno2 inet manual
iface eno3 inet manual
allow-hotplug bond0
iface bond0 inet manual
up ip link set bond0 0.0.0.0 up
down ip link set bond0 down
slaves eno2 eno3
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
allow-hotplug 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 user namespace for unprivileged containers
------------------------------------------------------
Linux supports unprivileged containers with the user namespace.
By default the user namespace is disabled on Debian systems (see #898446).
To enable user namespace, edit the following file for a permant change:
/etc/sysctl.d/zz-compute-tools.conf
sysctl -p
or enable it manually with:
echo 1 > /proc/sys/kernel/unprivileged_userns_clone
Note that containers need to be started with the correct
configuration in /etc/compute-tools/container/config to run unpriviled
(private-users option).
5. Enabling container-shell
---------------------------
Managing privileged containers requires root privileges. In order to allow
unprivileged users to manage privileged containers without granting them
privileges or accounts, the container-shell can be used together with sudo
and a container user.
sudo adduser --gecos "compute-tools,,," \
--home /var/lib/open-infrastructure/container-shell \
--shell /usr/bin/container-shell
|
