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LXC - Install LXC

sudo snap install lxd

or

sudo apt install lxc

NOTE: The snap version will most likely be more up to date.

Install LXC Utils

sudo apt install lxc-utils

Get Info

lxc info

returns:

If this is your first time running LXD on this machine, you should also run: lxd init
To start your first instance, try: lxc launch ubuntu:18.04

Configure LXD

Before you can create an instance, you need to configure LXD.

lxd init

NOTE: This will prompt for how to configure it. Just take the defaults for now.

Would you like to use LXD clustering? (yes/no) [default=no]:
Do you want to configure a new storage pool? (yes/no) [default=yes]:
Name of the new storage pool [default=default]:
Name of the storage backend to use (dir, lvm, ceph, btrfs) [default=btrfs]:
Create a new BTRFS pool? (yes/no) [default=yes]:
Would you like to use an existing empty block device (e.g. a disk or partition)? (yes/no) [default=no]:
Size in GB of the new loop device (1GB minimum) [default=30GB]:
Would you like to connect to a MAAS server? (yes/no) [default=no]:
Would you like to create a new local network bridge? (yes/no) [default=yes]:
What should the new bridge be called? [default=lxdbr0]:
What IPv4 address should be used? (CIDR subnet notation, “auto” or “none”) [default=auto]:
What IPv6 address should be used? (CIDR subnet notation, “auto” or “none”) [default=auto]:
Would you like LXD to be available over the network? (yes/no) [default=no]:
Would you like stale cached images to be updated automatically? (yes/no) [default=yes]
Would you like a YAML “lxd init” preseed to be printed? (yes/no) [default=no]:

Create ~/.config/lxc

mkdir ~/.config/lxc

Create ~/.config/lxc/default.conf

~/.config/lxc/default.conf

lxc.include = /etc/lxc/default.conf
lxc.idmap = u 0 100000 65536
lxc.idmap = g 0 100000 65536

Test

lxc-create -t download -n test

NOTE: The download option is used to display a list of all available images, allowing one to be selected.

NOTE: An error may be seen:

Setting up the GPG keyring
ERROR: Unable to fetch GPG key from keyserver
lxc-create: test: lxccontainer.c: create_run_template: 1626 Failed to create container from template
lxc-create: test: tools/lxc_create.c: main: 319 Failed to create container test

Try using the following:

lxc-create -t download -n test -- --keyserver hkp://p80.pool.sks-keyservers.net:80

or

lxc-create -n test -t download -- --no-validate

returns:

Setting up the GPG keyring
Downloading the image index
 
---
DIST	RELEASE	ARCH	VARIANT	BUILD
---
alpine	3.10	amd64	default	20210103_13:00
alpine	3.10	arm64	default	20210103_13:00
alpine	3.10	armhf	default	20210103_13:00
alpine	3.10	i386	default	20210103_13:00
alpine	3.10	ppc64el	default	20210103_13:00
alpine	3.10	s390x	default	20210103_13:00
alpine	3.11	amd64	default	20210103_13:00
alpine	3.11	arm64	default	20210103_13:00
alpine	3.11	armhf	default	20210103_13:00
alpine	3.11	i386	default	20210103_13:00
alpine	3.11	ppc64el	default	20210103_13:00
alpine	3.11	s390x	default	20210103_13:00
alpine	3.12	amd64	default	20210103_13:00
alpine	3.12	arm64	default	20210103_13:00
alpine	3.12	armhf	default	20210103_13:00
alpine	3.12	i386	default	20210103_13:00
alpine	3.12	ppc64el	default	20210103_13:00
alpine	3.12	s390x	default	20210103_13:00
alpine	edge	amd64	default	20210103_13:00
alpine	edge	arm64	default	20210103_13:00
alpine	edge	armhf	default	20210103_13:00
alpine	edge	i386	default	20210103_13:00
alpine	edge	ppc64el	default	20210103_13:00
alpine	edge	s390x	default	20210103_13:00
alt	Sisyphus	amd64	default	20210103_01:17
alt	Sisyphus	arm64	default	20210103_01:17
alt	Sisyphus	i386	default	20210103_01:17
alt	Sisyphus	ppc64el	default	20210103_01:17
alt	p9	amd64	default	20210103_01:17
alt	p9	arm64	default	20210103_01:17
alt	p9	i386	default	20210103_01:17
apertis	v2019.5	amd64	default	20210103_10:53
apertis	v2019.5	arm64	default	20210103_10:53
apertis	v2019.5	armhf	default	20210103_10:53
apertis	v2020.3	amd64	default	20210103_10:53
apertis	v2020.3	arm64	default	20210103_10:53
apertis	v2020.3	armhf	default	20210103_10:53
archlinux	current	amd64	default	20210103_04:18
archlinux	current	arm64	default	20210103_04:18
archlinux	current	armhf	default	20210103_04:18
centos	7	amd64	default	20210103_07:41
centos	7	armhf	default	20210103_07:08
centos	7	i386	default	20210103_07:08
centos	8-Stream	amd64	default	20210103_07:08
centos	8-Stream	arm64	default	20210103_07:08
centos	8-Stream	ppc64el	default	20210103_07:08
centos	8	amd64	default	20210103_07:41
centos	8	arm64	default	20210103_07:08
centos	8	ppc64el	default	20210103_07:08
debian	bullseye	amd64	default	20210103_05:24
debian	bullseye	arm64	default	20210103_05:24
...

Select which image to use

In this example the following is chosen:

Distribution: ubuntu.
Release: xenial.
Architecture: amd64.

Distribution: 
ubuntu
Release: 
xenial
Architecture: 
amd64
 
Downloading the image index
Downloading the rootfs
Downloading the metadata
The image cache is now ready
Unpacking the rootfs
 
---
You just created an Ubuntu xenial amd64 (20210103_07:42) container.
 
To enable SSH, run: apt install openssh-server
No default root or user password are set by LXC.

References

https://linuxcontainers.org/lxd/docs/master/

https://linuxcontainers.org/lxd/getting-started-cli/

Wiki

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