lk/distros/arch/lxc.md

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2020-01-02 00:04:35 +00:00
This is an untested mess.
# Required
> sudo pacman -S lxc arch-install-scripts dnsmasq
Place the following in /etc/default/lxc-net to configure the network:
---
# Leave USE_LXC_BRIDGE as "true" if you want to use lx
cbr0 for your
# containers. Set to "false" if you'll use virbr0 or
another existing
# bridge, or mavlan to your host's NIC.
USE_LXC_BRIDGE="true"
# If you change the LXC_BRIDGE to something other than
lxcbr0, then
# you will also need to update your /etc/lxc/default.c
onf as well as the
# configuration (/var/lib/lxc/<container>/config) for
any containers
# already created using the default config to reflect
the new bridge
# name.
# If you have the dnsmasq daemon installed, you'll als
o have to update
# /etc/dnsmasq.d/lxc and restart the system wide dnsma
sq daemon.
LXC_BRIDGE="lxcbr0"
LXC_ADDR="10.0.3.1"
LXC_NETMASK="255.255.255.0"
LXC_NETWORK="10.0.3.0/24"
LXC_DHCP_RANGE="10.0.3.2,10.0.3.254"
LXC_DHCP_MAX="253"
# Uncomment the next line if you'd like to use a conf-
file for the lxcbr0
# dnsmasq. For instance, you can use 'dhcp-host=mail1
,10.0.3.100' to have
# container 'mail1' always get ip address 10.0.3.100.
#LXC_DHCP_CONFILE=/etc/lxc/dnsmasq.conf
# Uncomment the next line if you want lxcbr0's dnsmasq
to resolve the .lxc
# domain. You can then add "server=/lxc/10.0.3.1' (or
your actual $LXC_ADDR)
# to your system dnsmasq configuration file (normally
/etc/dnsmasq.conf,
# or /etc/NetworkManager/dnsmasq.d/lxc.conf on systems
that use NetworkManager).
# Once these changes are made, restart the lxc-net and
network-manager services.
# 'container1.lxc' will then resolve on your host.
#LXC_DOMAIN="lxc"
---
Then start the lxc NAT:
> sudo systemctl start lxc-net
> sudo systemctl restart NetworkManager
... and make sure the bridge's ip-range doesn't intefere withe local network.
> sudo arp-scan -I lxcbr0 -l
The lxc template is in /etc/lxc/default.conf. You need to modify it so that it uses lxcbr0.
---
/etc/lxc/default.conf
lxc.net.0.type = veth
lxc.net.0.link = lxcbr0
lxc.net.0.flags = up
lxc.net.0.hwaddr = 00:16:3e:xx:xx:xx
---
# Making machines
> sudo lxc-create -n roach -t download -- --dist archlinux --release current --arch amd64
Arch linux containers take up about 600 Megs.
To speed up the startup process, one can install haveged and start the haveged.service. Haveged stops the wait-time for system entropy creation.
Machines are stored in /var/lib/lxc.
# Starting
> lxc-attach -n roach