LXC
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This document discusses Linux containers (LXC), which provides operating system-level virtualization. It allows multiple isolated Linux systems to run on a single host. LXC offers advantages like being lightweight, providing comprehensive process and resource isolation, and allowing for rapid deployment. The document outlines basic LXC usage like creating, starting, and stopping containers. It also covers more advanced topics such as unprivileged containers, cloning and snapshots, networking configurations, and example applications for LXC.
LXC
- 1. Linux is amazing! 1 Linux Containers 101502551 資工 2B 蔣彥亭
- 2. Linux is amazing! 2 Outline ● What is LXC? ● Advantages ● Basic Usage ● Advanced
- 3. Linux is amazing! 3 What is LXC? ● LXC (Linux Containers) is an operating system–level virtualization method for running multiple isolated Linux systems (containers) on a single control host. Virtualization??Virtualization?? system–levelsystem–level
- 4. Linux is amazing! 4 Virtualization ● Full virtualization ● Ex: vmware, virtualbox, Xen ● Paravirtualization ● Ex: Xen, Hyper-V ● OS-Virtualization ● Ex: LXC, OpenVZ
- 5. Linux is amazing! 5 Advantages ● Lightweight and resource- friendly ● Comprehensive process and resource isolation ● Rapid and Easy deployment
- 6. Linux is amazing! 6 Basic Usage $ sudo lxc-create -t download -n <vm_name> ex: $ sudo lxc-create -t download -n ubuntu1 $ sudo lxc-start -n <vm_name> -d ex: $ sudo lxc-start -n ubuntu1 -d $ sudo lxc-info -n <vm_name> ex: $ sudo lxc-info -n ubuntu1 $ sudo lxc-ls –fancy $ sudo lxc-stop -n <vm_name> ex: $ sudo lxc-stop -n ubuntu1 $ sudo lxc-destroy -n <vm_name> ex: $ sudo lxc-destroy -n ubuntu1
- 7. Linux is amazing! 7 Setting Files ● Global: /etc/lxc ● Unprevileged: ~/.config/lxc
- 8. Linux is amazing! 8 Unprivileged Container ● Create container without having root privilege. ● Modify ~/.config/lxc/default.conf ● Modify /etc/lxc/lxc-usernet lxc.id_map = u 0 100000 65536 lxc.id_map = g 0 100000 65536 lxc.network.type = veth lxc.network.link = lxcbr0 $USER veth lxcbr0 2
- 9. Linux is amazing! 9 Unprivileged Container ● You may need the following command... $ sudo apt-get install cgmanager-utils $ sudo cgm create all $USER $ sudo cgm chown all $USER $(id -u) $(id -g) $ cgm movepid all $USER $$
- 10. Linux is amazing! 10 Cloning & Snapshots $ lxc-clone -s -o C1 -n C2 #cloning $ lxc-snapshot -n C1 #make a snapshot $ lxc-start-ephemeral -o C1 #ephemeral container for C1
- 11. Linux is amazing! 11 Networking ● DHCP by domain name: /etc/lxc/dnsmasq.conf ● Public network access: dhcp-host=lxcmail,10.0.3.100 dhcp-host=ttrss,10.0.3.101 iptable is unstoppable.
- 12. Linux is amazing! 12 Applications ● Web Servers ● VPS ( Virtual Private Server )
- 13. Linux is amazing! 13 Opps!! ● Debug: $ lxc-start -l info -n <vm_name> -o debug.log
- 14. Linux is amazing! 14 Q & A
- 15. Linux is amazing! 15 References ● http://askubuntu.com/questions/2 93275/what-is-lxc-and-how-to-get -started ● https://linuxcontainers.org/ ● https://help.ubuntu.com/lts/serv erguide/lxc.html
- 16. Linux is amazing! 16 Thank you for your attention.Thank you for your attention.