Linux containers
Notes while reading :
Getting the packages
# ubuntu snap install lxd 4.0
snap install lxd --channel=4.0/stable
Launch an instance
lxc launch ubuntu:20.04 ubuntu2004
Chnage bridge IP address
$ lxc network edit lxdbr0
### This is a YAML representation of the network.
### Any line starting with a '# will be ignored.
###
### A network consists of a set of configuration items.
###
### An example would look like:
### name: lxdbr0
### config:
### ipv4.address: 10.62.42.1/24
### ipv4.nat: true
### ipv6.address: fd00:56ad:9f7a:9800::1/64
### ipv6.nat: true
### managed: true
### type: bridge
###
### Note that only the configuration can be changed.
config:
ipv4.address: 10.10.10.12/24 # ip interface lxdbr0
ipv4.nat: "true" # to create iptables SNAT rule
ipv6.address: none
description: ""
name: lxdbr0
type: bridge
used_by:
- /1.0/profiles/default
managed: true
status: Created
locations:
- none
Interacting with remote hosts
Adding a remote
You have two machines with LXD installed
-
remote host: foo (remote host ip address : 1.2.3.4)
lxc config set core.https_address [::]:8443 lxc config set core.trust_password something-secure -
local machine
lxc config set core.https_address [::]:8443 # add “foo” to your local client lxc remote add foo 1.2.3.4
Listing containers
Listing running containers on a remote host (foo)
lxc list foo:
Copying containers
Copying containers between remote host (foo:c1) and local (c2)
lxc copy foo:c1 c2
# copy of a container with snapshot
lxc copy foo:c1/snapshot1 c3
Deletion protection for containers
# Set protection.delete
$ lxc config set c1 security.protection.delete true
$ lxc delete c1
Error: Container is protected
# Unset protection.delete
$ lxc config unset c1 security.protection.delete
$ lxc delete c1
[Delete alias]
One is to setup an alias from lxc delete to lxc delete -i:
stgraber@castiana:~$ lxc alias add delete "delete -i"
stgraber@castiana:~$ lxc delete c1
Remove c1 (yes/no):