lxd-lxc.txt

#Installing LXD/LXC on ubuntu
apt install lxd lxd-client

#Intialize LXD for configuration, use defaults by just pressing enter multiple times
#If you want containers to run on ZFS, first install zfsutils-linux before init
lxd init 

#Show a list of containers
lxc list

#Create a new ubuntu 18.04 container, container name optional
lxc launch ubuntu:18.04 <container name>

#Create a new CentOS 8 container from the image store
lxc launch images:centos/8 <container name>

#Open bash shell in container
lxc exec <container name> -- /bin/bash

#To stop running container
lxc stop <container name>

#To delete container, must be stopped
lxc rm <container name>

#To start a stoppped container
lxc start <container name>

#Lauch local file editor of a file on a container
lxc file edit <container name>/filepath/filename

#Push a local file to container
lxc file push <filename> <container name>/filepath

#Create snapshot of container
lxc snapshot <container name> <snapshot name>

#To view details about container
lxc info <container name>

#To restore container from previous snapshot
lxc restore <container name> <snapshot name>

#To delete a snapshot
lxc delect <container>/<snapshot name>

#To create a new container from other container's snapshot
lxc copy <old container name>/<snapshot> <new container name>
 
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#Show network profiles
lxc profile list

#See details of profile
lxc profile show <profile name>

#Copy default network profile to new profile	
lxc profile copy default <new profile>

#Edit profile using editor
lxc profile edit <profile name>

#Create container that uses a specific profile
lxc launch -p <profile name> ubuntu:18.04 <container name>

#Example of macvlan interface
  eth1:
    name: eth1
    nictype: macvlan
    parent: eno1
    type: nic

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#List of remote locations to download images from
lxc remote list

#List downloaded container images
lxc image list

#To delete locally saved images
lxc image delete <image name>


#Working with lightweight alpine container
  - lxc launch images:alpine/3.5 alpine-matt #gets from remote location
  - lxc exec alpine-matt --ash #does not have /bin/bash, very light linux


#Troubleshooting issues
  - Missing parent lxdbr0 error
    - sudo dpkg-reconfigure -p medium lxd

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#Setup remote port listening for secondary server
lxc config set core.https_address "[::]:8443"

#Setup password for lxc connections
lxc config set core.trust_password <password>

#Connect to remote lxc server
lxc remote add <label> <ip address>:8443
	
#List running containers on remote server
lxc list <label>

#List images on remote server
lxc image list second

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#Publish snapshot to a useable image
lxc publish <container>/<snapshot> --alias <new image name>

#Export a container, outputs to a .tar.gz file
lxc image export <image> <filepath>

#Import a container on a new host server
lxc image import <tar file> --alias <image name>


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#Forwarding of traffic can be used to direct host network traffic to container
#Check to see if forwarding is turned on, should come back as 1 not 0 for forwarding
systemctl net.ipv4.ip_forward

#Using IPTABLES to forward host tcp port 80 to container with ip 10.10.10.120
sudo iptables -t nat -A PREROUTING -i eth0 -p tcp -m tcp --dport 80 -j DNAT --to 10.10.10.120:80


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#Change security to run docker within lxc/lxd containers
lxc config set <container> security.nesting true

#Change security to allow lxc/lxd containers to mount nfs/smb shares
lxc config set <container> security.privileged true