PC が “Operating System Not Found” と起動しなくなってしまったので Ubuntu 17.10 をクリーンインストールして「ソフトウェア」ってソフトを起動したらコレクションに LXD があったので試してみることにした。
$ sudo snap install lxd
でインストールできる。
$ sudo lxd init Do you want to configure a new storage pool (yes/no) [default=yes]? Name of the new storage pool [default=default]: Name of the storage backend to use (dir, btrfs, ceph, lvm, zfs) [default=zfs]: dir Would you like LXD to be available over the network (yes/no) [default=no]? Would you like stale cached images to be updated automatically (yes/no) [default=yes]? Would you like to create a new network bridge (yes/no) [default=yes]? What should the new bridge be called [default=lxdbr0]? What IPv4 address should be used (CIDR subnet notation, “auto” or “none”) [default=auto]? What IPv6 address should be used (CIDR subnet notation, “auto” or “none”) [default=auto]? LXD has been successfully configured.
CentOS 7 のコンテナを起動させてみる
$ sudo lxc launch images:centos/7/amd64 srv01
と実行するとイメージのダウンロードが始まります、2回目以降など、既にダウンロード済みならすぐに作成されます。
$ sudo lxc launch images:centos/7/amd64 srv01 Creating srv01 Retrieving image: rootfs: 63% (1.65MB/s)
$ sudo lxc launch images:centos/7/amd64 srv01 Creating srv01 Starting srv01
$ sudo lxc list +-------+---------+---------------------+----------------------------------------------+------------+-----------+ | NAME | STATE | IPV4 | IPV6 | TYPE | SNAPSHOTS | +-------+---------+---------------------+----------------------------------------------+------------+-----------+ | srv01 | RUNNING | 10.20.22.236 (eth0) | fd42:ea65:7ecf:78e8:216:3eff:fe60:5e4 (eth0) | PERSISTENT | 0 | +-------+---------+---------------------+----------------------------------------------+------------+-----------+
$ sudo lxc info srv01
Name: srv01
Remote: unix://
Architecture: x86_64
Created: 2017/11/09 14:42 UTC
Status: Running
Type: persistent
Profiles: default
Pid: 8883
Ips:
eth0: inet 10.20.22.236 vethHJ05J0
eth0: inet6 fd42:ea65:7ecf:78e8:216:3eff:fe60:5e4 vethHJ05J0
eth0: inet6 fe80::216:3eff:fe60:5e4 vethHJ05J0
lo: inet 127.0.0.1
lo: inet6 ::1
Resources:
Processes: 11
CPU usage:
CPU usage (in seconds): 1
Memory usage:
Memory (current): 37.02MB
Memory (peak): 40.30MB
Network usage:
eth0:
Bytes received: 33.09kB
Bytes sent: 1.77kB
Packets received: 331
Packets sent: 17
lo:
Bytes received: 0B
Bytes sent: 0B
Packets received: 0
Packets sent: 0
コンテナ内に入るには lxc exec を使います
$ sudo lxc exec srv01 -- bash [root@srv01 ~]# ps -ef UID PID PPID C STIME TTY TIME CMD root 1 0 0 14:42 ? 00:00:00 /sbin/init root 33 1 0 14:42 ? 00:00:00 /usr/lib/systemd/systemd-journald root 37 1 0 14:42 ? 00:00:00 /usr/lib/systemd/systemd-udevd root 55 1 0 14:42 ? 00:00:00 /usr/sbin/rsyslogd -n dbus 57 1 0 14:42 ? 00:00:00 /bin/dbus-daemon --system --address=systemd: --nofork --nopidfile --systemd-activation root 64 1 0 14:42 ? 00:00:00 /usr/lib/systemd/systemd-logind root 69 1 0 14:42 ? 00:00:00 /usr/sbin/crond -n root 70 1 0 14:42 console 00:00:00 /sbin/agetty --noclear --keep-baud console 115200 38400 9600 linux root 242 1 0 14:42 ? 00:00:00 /sbin/dhclient -1 -q -lf /var/lib/dhclient/dhclient--eth0.lease -pf /var/run/dhclient-et root 303 0 0 14:45 ? 00:00:00 bash root 312 303 0 14:46 ? 00:00:00 ps -ef
https://linuxcontainers.org/ja/lxd/getting-started-cli/ を見ると基本的なコマンドの使い方はわかります
停止は lxc stop srv01
削除は lxc delete srv01
イメージのリストは lxc image list
イメージの削除は lxc image delete XXXXX (XXXXX は list で表示される FINGERPRINT)
$ sudo lxc image list +-------+--------------+--------+---------------------------------+--------+---------+-----------------------------+ | ALIAS | FINGERPRINT | PUBLIC | DESCRIPTION | ARCH | SIZE | UPLOAD DATE | +-------+--------------+--------+---------------------------------+--------+---------+-----------------------------+ | | bd115f8374ba | no | Centos 7 amd64 (20171109_02:28) | x86_64 | 82.26MB | Nov 9, 2017 at 2:42pm (UTC) | +-------+--------------+--------+---------------------------------+--------+---------+-----------------------------+
lxd グループに自分を追加しておけば lxc コマンドを sudo なしで使えるようになる
