Linux Containers

sudo apt upgrade && sudo apt autoremove
sudo snap install lxd --channel=4.0/stable

sudo snap start lxd
sudo snap stop lxd
sudo snap logs lxd

Initial Setup

sudo lxd init
:'
Would you like to use LXD clustering? (yes/no) [default=no]: yes
What IP address or DNS name should be used to reach this node? [default=10.20.21.10]: 
Are you joining an existing cluster? (yes/no) [default=no]:   
What name should be used to identify this node in the cluster? [default=ubuntu]: academia
Setup password authentication on the cluster? (yes/no) [default=no]: 
Do you want to configure a new local storage pool? (yes/no) [default=yes]:   
Name of the storage backend to use (btrfs, dir, lvm, zfs) [default=zfs]: 
Create a new ZFS 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=25GB]: 100GB
Do you want to configure a new remote storage pool? (yes/no) [default=no]: 
Would you like to connect to a MAAS server? (yes/no) [default=no]: 
Would you like to configure LXD to use an existing bridge or host interface? (yes/no) [default=no]: 
Would you like to create a new Fan overlay network? (yes/no) [default=yes]: 
What subnet should be used as the Fan underlay? [default=auto]: 
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]: 
'

Instance Management

lxc image list images: ubuntu amd64
lxc image list images: ubuntu arm64
lxc image list images: ubuntu

lxc launch images:alpine/3.15 academia --vm lxc launch images:alpine/3.15 academia lxc restart academia lxc start academia lxc stop academia

lxc launch images:opensuse/15.3 agronomy --vm lxc launch images:opensuse/15.3 agronomy lxc restart agronomy lxc start agronomy lxc stop agronomy

lxc launch images:apertis/v2020 robotics lxc launch images:apertis/v2021 robotics lxc restart robotics lxc start robotics lxc stop robotics

lxc list -c nsS
lxc list

lxc exec academia -- su --login chorke
lxc exec academia -- /bin/sh
lxc exec academia sh
lxc console academia

download from container to host
lxc file pull academia/etc/hosts ./

upload into container from host
lxc file push -r ~/.ssh/ academia/root/.ssh/
lxc file push ~/.ssh/known_hosts academia/root/.ssh/

lxc stop academia && lxc delete academia
lxc delete academia --force

manipulate remote images
lxc image refresh ubuntu:21.04
lxc image delete ubuntu:21.04
lxc image show ubuntu:21.04
lxc image edit ubuntu:21.04

manipulate local images
lxc image delete 97c97f4a1d2d
lxc image delete a7b1071c0609

Knowledge

lxc list
journalctl -xe
snap revert lxd
snap list --all lxd
sudo snap remove lxd
journalctl -u snap.lxd.daemon
systemctl reload snap.lxd.daemon
systemctl status snap.lxd.daemon

troubleshoot network
sudo tcpdump -i eth0 -vn icmp
sudo nmcli c up System\ eth0
ps uax | grep systemd-udev
ps aux | grep dnsmasq
ip a
ip r

sudo snap install lxd --channel=3.0/stable
sudo snap install lxd --channel=4.0/stable
sudo snap install lxd --channel=5.0/stable

mount | grep cgroup
systemd.unified_cgroup_hierarchy=0
cat /var/snap/lxd/common/lxd/logs/lxd.log

sudo apt update  && sudo apt list --upgradable 
sudo apt upgrade && sudo apt autoremove
sudo apt install snapd

sudo snap install lxd --channel=4.0/stable
sudo snap install lxd --channel=3.0/stable
sudo snap install lxd
sudo lxd.migrate

sudo lxd init --auto
sudo lxd init

lxc remote list
lxc image  list

lxc image list images: alpine
lxc image list images: alpine arm64
lxc image list images: alpine amd64

lxc image list images: debian
lxc image list images: debian arm64
lxc image list images: debian amd64

lxc image list images: oracle
lxc image list images: oracle arm64
lxc image list images: oracle amd64

lxc image list images: ubuntu
lxc image list images: ubuntu arm64
lxc image list images: ubuntu amd64

sudo ls -la /var/snap/lxd/common/lxd/images/
sudo cat /var/snap/lxd/common/lxcfs.pid
sudo systemctl stop snap.lxd.daemon
sudo apt install zfsutils-linux
sudo lxc --verbose --debug list
sudo lxd --debug --group lxd
sudo ps fauxww | grep lx
sudo zfs list -t all
sudo ps fauxww

sudo groupadd --system lxd
sudo usermod -G lxd -a $USER
newgrp lxd

References

Coexistence of Hypervisor, Docker & LXD Linux Containers Cloud Init Installing snap on Ubuntu Getting Started with LXC Docker on Windows Docker Compose Installing snapd Docker vs. LXC Podman Docker

PC2PC Online Share Sync Link Net Bridge Cable SSH into another computer over USB Wi-Fi Hotspot (Access Point mode) Ubuntu install LXD Snap Store LXD cluster on Raspberry Pi 4 USB 2.0 Data Link Cable LXD command hangs LXD purge and install Install Alpine on LXD Linux Cloud Init

Containers unable to ping outside CentOS/8 unable to get IPv4 Close a frozen SSH Snap remove LXD LXC CGroupV2