LXC/LXD拉取镜像至本地并设置别名

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本文详细记录了在Ubuntu环境下使用LXC进行容器镜像复制、初始化及列表展示的操作过程，包括从远程仓库复制Ubuntu 20.04和CentOS 7/8的容器镜像，并展示了本地容器镜像的列表详情。

ubuntu@shenzhen:~ $ lxc image copy tuna-images:ubuntu/20.04 local: --copy-aliases
Image copied successfully!                     
ubuntu@shenzhen:~ $ lxc init ubuntu/focal focal
Creating focal
ubuntu@shenzhen:~ $ lxc image list
+-----------------------+--------------+--------+-------------------------------------+--------------+-----------+----------+------------------------------+
|         ALIAS         | FINGERPRINT  | PUBLIC |             DESCRIPTION             | ARCHITECTURE |   TYPE    |   SIZE   |         UPLOAD DATE          |
+-----------------------+--------------+--------+-------------------------------------+--------------+-----------+----------+------------------------------+
| centos/8              | 346e46c24103 | no     | Centos 8 amd64 (20200814_07:08)     | x86_64       | CONTAINER | 125.16MB | Aug 15, 2020 at 6:22am (UTC) |
+-----------------------+--------------+--------+-------------------------------------+--------------+-----------+----------+------------------------------+
| ubuntu/focal (7 more) | 1c49c35aba7f | no     | Ubuntu focal amd64 (20200814_08:27) | x86_64       | CONTAINER | 98.00MB  | Aug 15, 2020 at 1:19pm (UTC) |
+-----------------------+--------------+--------+-------------------------------------+--------------+-----------+----------+------------------------------+
ubuntu@shenzhen:~ $ lxc image copy tuna-images:centos/7 local: --copy-aliases
Image copied successfully!                   
ubuntu@shenzhen:~ $ lxc image list
+-----------------------+--------------+--------+-------------------------------------+--------------+-----------+----------+------------------------------+
|         ALIAS         | FINGERPRINT  | PUBLIC |             DESCRIPTION             | ARCHITECTURE |   TYPE    |   SIZE   |         UPLOAD DATE          |
+-----------------------+--------------+--------+-------------------------------------+--------------+-----------+----------+------------------------------+
| centos/7 (3 more)     | 8aca780092e5 | no     | Centos 7 amd64 (20200814_07:08)     | x86_64       | CONTAINER | 83.16MB  | Aug 15, 2020 at 1:20pm (UTC) |
+-----------------------+--------------+--------+-------------------------------------+--------------+-----------+----------+------------------------------+
| centos/8              | 346e46c24103 | no     | Centos 8 amd64 (20200814_07:08)     | x86_64       | CONTAINER | 125.16MB | Aug 15, 2020 at 6:22am (UTC) |
+-----------------------+--------------+--------+-------------------------------------+--------------+-----------+----------+------------------------------+
| ubuntu/focal (7 more) | 1c49c35aba7f | no     | Ubuntu focal amd64 (20200814_08:27) | x86_64       | CONTAINER | 98.00MB  | Aug 15, 2020 at 1:19pm (UTC) |
+-----------------------+--------------+--------+-------------------------------------+--------------+-----------+----------+------------------------------+