LXC : Install2014/06/16 |
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Install LXC which is an operating system-level virtualization.
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| [1] | Install LXC |
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root@lxc:~# apt-get -y install lxc
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| [2] | Create and boot a Container. |
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# create a "ubuntu01" container with the template "ubuntu" root@lxc:~# lxc-create -n ubuntu01 -t ubuntu Checking cache download in /var/cache/lxc/trusty/rootfs-amd64 ... Installing packages in template: ssh,vim,language-pack-en Downloading ubuntu trusty minimal ... ... ... ... Current default time zone: 'Asia/Tokyo' Local time is now: Mon Jun 16 17:11:23 JST 2014. Universal Time is now: Mon Jun 16 08:11:23 UTC 2014. ## # The default user is 'ubuntu' with password 'xxxxxx'! # Use the 'sudo' command to run tasks as root in the container. ## # show the list of Containers root@lxc:~# lxc-ls ubuntu01 # start a Container as a daemon root@lxc:~# lxc-start -n ubuntu01 -d # connect to the console of the Container root@lxc:~# lxc-console -n ubuntu01 Connected to tty 1 Type <Ctrl+a q> to exit the console, <Ctrl+a Ctrl+a> to enter Ctrl+a itself Ubuntu 14.04 LTS ubuntu01 tty1
ubuntu01 login:
# just connected # push "Ctrl+a" key and "q" key to exit the console of a Container |
| [3] | There are some templates not only Ubuntu. |
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# there are some templates on there root@lxc:~# ls /usr/share/lxc/templates/ lxc-alpine lxc-centos lxc-fedora lxc-oracle lxc-ubuntu-cloud lxc-altlinux lxc-cirros lxc-gentoo lxc-plamo lxc-archlinux lxc-debian lxc-openmandriva lxc-sshd lxc-busybox lxc-download lxc-opensuse lxc-ubuntu # for example, create a "CentOS" Container root@lxc:~# apt-get -y install yum root@lxc:~# lxc-create -n centos01 -t centos root@lxc:~# cat /var/lib/lxc/centos/tmp_root_pass # make sure root password xxxxxxxxxxxxxxxxx # start the Container root@lxc:~# lxc-start -n centos01 -d # connect to the console of Container root@lxc:~# lxc-console -n centos01 Connected to tty 1 Type <Ctrl+a q> to exit the console, <Ctrl+a Ctrl+a> to enter Ctrl+a itself CentOS release 6.5 (Final) Kernel 3.13.0-29-generic on an x86_64centos01 login: |
| [4] | Other basic usages. |
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# execute an application with booting a Container root@lxc:~# lxc-start -n ubuntu01 /bin/echo "Welcome to the LXC World!" Welcome to the LXC World! # stop a Container as a daemon root@lxc:~# lxc-stop -n ubuntu01
# delete a Container root@lxc:~# lxc-destroy -n ubuntu01
# show info of a Container root@lxc:~# lxc-info -n ubuntu01
Name: ubuntu01 State: STOPPED # clone a Container from an existing Container root@lxc:~# lxc-clone ubuntu01 ubuntu02 Created container ubuntu02 as copy of ubuntu01 # take a snapshot of a Container root@lxc:~# lxc-snapshot -n ubuntu01 lxc_container: Snapshot of directory-backed container requested. lxc_container: Making a copy-clone. If you do want snapshots, then lxc_container: please create an aufs or overlayfs clone first, snapshot that lxc_container: and keep the original container pristine. root@lxc:~# lxc-snapshot -n ubuntu01 --list # make sure snap0 (/var/lib/lxcsnaps/ubuntu01) 2014:06:16 21:36:50 # restore from a snapshot root@lxc:~# lxc-snapshot -n ubuntu01 -r snap0
# connect to a Container which is running as a daemon root@lxc:~# lxc-info -n ubuntu01 | grep IP IP: 10.0.1.5root@lxc:~# ssh ubuntu@10.0.1.5 ubuntu@10.0.1.5's password: Welcome to Ubuntu 14.04 LTS (GNU/Linux 3.13.0-29-generic x86_64) * Documentation: https://help.ubuntu.com/ Last login: Tue Jun 16 20:20:56 2014 ubuntu@ubuntu01:~$ |
| [5] | It's possible to access to services with HTTP or SSH and others which is running in Containers as a daemon. |
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# default networking settings root@lxc:~# egrep -v "^#|^$" /etc/default/lxc-net USE_LXC_BRIDGE="true" LXC_BRIDGE="lxcbr0" LXC_ADDR="10.0.1.1" LXC_NETMASK="255.255.255.0" LXC_NETWORK="10.0.1.0/24" LXC_DHCP_RANGE="10.0.1.2,10.0.1.254" LXC_DHCP_MAX="253" # bridge networking is configured like follows by default settings root@dlp:~# ifconfig | grep -A1 lxcbr0
lxcbr0 Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet addr:10.0.1.1 Bcast:10.0.1.255 Mask:255.255.255.0
# make sure the IP address of a Container which is running as a daemon # it's possible to access to the IP address of a Container with HTTP or SSH root@dlp:~# lxc-info -n ubuntu01 | grep IP IP: 10.0.1.77 |