WorkingTipsOnLXDMigration
Jul 21, 2021
Technology
环境
两台虚拟机用来模拟现实环境中的双节点（可以拓展到多节点）场景下的物理机器关机导致的LXD容器的迁移情况。
机器配置（以mig2为例):
root@mig2:/home/test# cat /etc/issue
Ubuntu 20.04.2 LTS \n \l
root@mig2:/home/test# free -g
total used free shared buff/cache available
Mem: 9 0 8 0 0 9
Swap: 0 0 0
root@mig2:/home/test# lxd --version
4.0.7
步骤
mig1节点上初始化:
root@mig1:/home/test# 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=192.168.89.11]:
Are you joining an existing cluster? (yes/no) [default=no]: no
What name should be used to identify this node in the cluster? [default=mig1]:
Setup password authentication on the cluster? (yes/no) [default=no]: 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 (lvm, zfs, btrfs, dir) [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=30GB]:
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]:
mig2节点加入集群:
root@mig2:/home/test# 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=192.168.89.12]:
Are you joining an existing cluster? (yes/no) [default=no]: yes
Do you have a join token? (yes/no) [default=no]: no
What name should be used to identify this node in the cluster? [default=mig2]:
IP address or FQDN of an existing cluster node: 192.168.89.11
Cluster fingerprint: 75ee6a1962985e0262d6bea9f95d554f197719cca19820671856280fe0d2e28b
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 "zfs.pool_name" property for storage pool "local":
Choose "size" property for storage pool "local": 30GB
Choose "source" property for storage pool "local":
Would you like a YAML "lxd init" preseed to be printed? (yes/no) [default=no]:
root@mig2:/home/test#
创建成功后，检查cluster情况:
# root@mig2:/home/test# lxc cluster list
To start your first instance, try: lxc launch ubuntu:18.04
+------+----------------------------+----------+--------+-------------------+--------------+
| NAME | URL | DATABASE | STATE | MESSAGE | ARCHITECTURE |
+------+----------------------------+----------+--------+-------------------+--------------+
| mig1 | https://192.168.89.11:8443 | YES | ONLINE | Fully operational | x86_64 |
+------+----------------------------+----------+--------+-------------------+--------------+
| mig2 | https://192.168.89.12:8443 | YES | ONLINE | Fully operational | x86_64 |
+------+----------------------------+----------+--------+-------------------+--------------+