terraform-lxd-example

Terraform with LXD Example: Creates a LXD Container, ZFS Pool, Userdata, etc.

Provider

Using the terraform-provider-lxd to provision a LXD container.

Pre-Requisites

You will require a host with LXD and you will also require to initialize the host and setup remote connections:

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

Terraform

Populate your lxd_host and lxd_password in variables.tf to fit your environment.

Then provision a lxd instance and a zfs storage pool with terraform:

terraform init
terraform plan
terraform apply

Outputs:

ip = "10.119.194.134"

SSH Config

To be able to ssh directly to a guest with its private ip on a remote lxd host, we can make use of ProxyJump in ssh config (~/.ssh/config):

# Globals
Host *
    StrictHostKeyChecking no
    UserKnownHostsFile /dev/null
    ServerAliveInterval 60
    ServerAliveCountMax 30

# LXD Host
Host lxd-host
    User ubuntu
    Hostname lxd-host.mydomain.com
    IdentityFile ~/.ssh/id_rsa

# LXD Containers
Host 10.119.*
    User ubuntu
    IdentityFile ~/.ssh/id_rsa
    ProxyJump lxd-host

We need to ensure that our public key ~/.ssh/id_rsa.pub is added to our ubuntu user's ~/.ssh/authorized_keys file, and in our main.tf user-data, that we supply the public key content in config/id_rsa.pub.

Then we should be able to ssh:

$ ssh 10.119.194.134
Warning: Permanently added 'x.x.x.x' (x) to the list of known hosts.
Warning: Permanently added '10.119.194.134' (ED25519) to the list of known hosts.
Welcome to Ubuntu 20.04.5 LTS (GNU/Linux 5.4.0-122-generic x86_64)

ubuntu@test1:~$