ssh x1
lxc profile device remove default root
lxc profile device remove default eth0
lxc storage delete local
lxc config unset core.https_address
lxc init
Would you like to use LXD clustering? (yes/no) [default=no]: yes
What name should be used to identify this node in the cluster? [default=localhost]: x3
What IP address or DNS name should be used to reach this node? [default=127.0.0.1]: 10.8.0.1
Are you joining an existing cluster? (yes/no) [default=no]:
Setup password authentication on the cluster? (yes/no) [default=yes]:
Trust password for new clients:
Again:
Do you want to configure a new local storage pool? (yes/no) [default=yes]:
Name of the storage backend to use (btrfs, dir, lvm) [default=btrfs]:
Create a new BTRFS pool? (yes/no) [default=yes]:
Would you like to use an existing empty disk or partition? (yes/no) [default=no]:
Size in GB of the new loop device (1GB minimum) [default=5GB]: 20GB
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]: yes
Name of the existing bridge or host interface: eth0
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]:
ssh x2
lxc profile device remove default root
lxc profile device remove default eth0
lxc storage delete local
lxc config unset core.https_address
lxc init
Would you like to use LXD clustering? (yes/no) [default=no]: yes
What name should be used to identify this node in the cluster? [default=localhost]: x2
What IP address or DNS name should be used to reach this node? [default=127.0.0.1]: 10.8.0.2
Are you joining an existing cluster? (yes/no) [default=no]: yes
IP address or FQDN of an existing cluster node: 10.8.0.1
Cluster fingerprint: b9d2523a4935474c4a52f16ceb8a44e80907143e219a3248fbb9f5ac5d53d926
You can validate this fingerprint by running "lxc info" locally on an existing node.
Is this the correct fingerprint? (yes/no) [default=no]: yes
Cluster trust password:
All existing data is lost when joining a cluster, continue? (yes/no) [default=no] yes
Choose "source" property for storage pool "local":
Choose "size" property for storage pool "local": 20GB
Would you like a YAML "lxd init" preseed to be printed? (yes/no) [default=no]:
> lxc cluster list
+-------+----------------------------+----------+--------+-------------------+--------------+----------------+
| NAME | URL | DATABASE | STATE | MESSAGE | ARCHITECTURE | FAILURE DOMAIN |
+-------+----------------------------+----------+--------+-------------------+--------------+----------------+
| x1 | https://10.166.11.235:8443 | YES | ONLINE | fully operational | aarch64 | |
+-------+----------------------------+----------+--------+-------------------+--------------+----------------+
| x2 | https://10.166.11.92:8443 | YES | ONLINE | fully operational | aarch64 | |
+-------+----------------------------+----------+--------+-------------------+--------------+----------------+
| x3 | https://10.166.11.200:8443 | YES | ONLINE | fully operational | aarch64 | |
+-------+----------------------------+----------+--------+-------------------+--------------+----------------+
> lxc remote add my-cluster x1
Certificate fingerprint: b9d2523a4935474c4a52f16ceb8a44e80907143e219a3248fbb9f5ac5d53d926
ok (y/n)? y
Admin password for my-cluster:
Client certificate stored at server: my-cluster
> lxc remote switch my-cluster
lxc launch images:alpine/edge c1
lxc launch images:archlinux c2
lxc launch images:ubuntu/18.04 c3
lxc launch images:ubuntu/20.04/cloud v1 --vm
lxc launch images:fedora/32/cloud v2 --vm
lxc launch images:debian/11/cloud v3 --vm
lxc snapshot blah backup
lxc publish blah/backup --alias blah-backup
lxc image export blah-backup .
lxc image delete blah-backup
Which will get you a tarball in your current directory.
To restore and create a container from it, you can then do:
lxc image import TARBALL-NAME --alias blah-backup
lxc launch blah-backup some-container-name
lxc image delete blah-backup
References:
[1] https://discuss.linuxcontainers.org/t/lxd-cluster-on-raspberry-pi-4/9076