tpokorra/lxc-scripts: scripts useful for running a server with several l...

Purpose

These scripts are useful to manage your own server, with several Linux containers.

Either clone this code repository: cd ~; git clone https://github.com/tpokorra/lxc-scripts.git scripts
Or install a package from LBS: https://lbs.solidcharity.com/package/tpokorra/lbs/lxc-scripts
There is a lxc-scripts package for CentOS7, and Ubuntu 20.04, with instructions how to install the package
To make things easier, I usually create a symbolic link: cd ~; ln -s /usr/share/lxc-scripts scripts

After installing the package, run these scripts for initializing the firewall and some fixes for the LXC templates:

/usr/share/lxc-scripts/initLXC.sh
/usr/share/lxc-scripts/initIPTables.sh

Initialise the host IPTables so that they will be survive a reboot: ~/scripts/initIPTables.sh
Small fixes to the LXC system for CentOS7 containers, and create ssh keys: ~/scripts/initLXC.sh
Create a container (with networking etc): ~/scripts/initCentOS.sh $name $id
Call the script without parameters to see additional parameters, eg to specify the version of the OS etc: ~/scripts/initCentOS.sh
There are scripts for creating CentOS, Debian, and Ubuntu containers
Containers are created in /var/lib/lxc/$name, see the file config and the directory rootfs
Start a container: lxc-start --name $name
Start a container without console: lxc-start -d --name $name
Stop a container: lxc-stop -n $name
Destroy a container: lxc-destroy --name $name
List all containers, with running state and IP address: lxc-ls -f
alternatively, there is this script: ~/scripts/listcontainers.sh which works even on CentOS where python3 is not (yet) available
this also shows the OS of the container
~/scripts/listcontainers.sh running: shows only running containers
~/scripts/listcontainers.sh stopped: shows only stopped containers
Stop all containers: ~/scripts/stopall.sh

Snapshots:

are stored in /var/lib/lxcsnaps/
first stop the container: lxc-stop -n $name
then create the snapshot: lxc-snapshot -n $name
create with comment: echo "mycomment" > /tmp/comment && lxc-snapshot -n $name -c /tmp/comment && rm -f /tmp/comment
list all snapshots: lxc-snapshot -LC -n $name
restore a snapshot: lxc-snapshot -n $name -r snap@
create a new container from snapshot: lxc-snapshot -n $name -r snap@ new$name
delete a snapshot: lxc-snapshot -n $name -d snap@