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lk/distros/arch/lxc.md
Malin Freeborn 6befc5d3c1 initial commit
2020-01-02 01:04:35 +01:00

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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//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