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Lxd the proper way of runing containers
This document discusses containers and LXD, which is a front-end for LXC Linux containers. It explains that containers provide benefits over virtual machines like higher density, faster startup times, and lower latency since they run processes on the same kernel. LXD makes it easier to manage LXC containers through its RESTful API, remote control, improved command line interface, and features for storage, networking, limits, and live migration. While LXD works out of the box on recent Ubuntu, installing it on other distributions like Debian and CentOS can be more difficult due to dependency requirements.
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Lxd the proper way of runing containers
- 1. LXDLXD the proper waytheproper way of runningof running containerscontainers Marian HackMan Marinov Chief System Architect of SiteGround.com <mm@1h.com>
- 2. Who am I?Whoam I?
- 3. Why containers?Why containers? ➢Density ➢ KVM has to reserve memory for its guests ➢ Container is a simple process under the same kernel, so its children can share the whole machine, and do so in collaboration, because they use the same memory manager.
- 4. Why containers?Why containers? ➢Startup time ➢ KVM 25 sec (can be optimized to around 8) ➢ Container 1.5 sec ➢ KVM 37 guests in 943sec ➢ Container 536 guests in 828sec Intel Server with 16GB of RAM
- 5. Why containers?Why containers? ➢Latency Physical hardware Linux Kernel Host Operating System Guest OS Virtual Machine Linux Kernel
- 6. Why containers?Why containers? ➢Latency Physical hardware Linux Kernel Host Operating System Guest OS Virtual Machine Linux Kernel
- 7. Why containers?Why containers? ➢Latency Physical hardware Linux Kernel Host Operating System Guest OS Virtual Machine Linux Kernel Guest OS Virtual Machine Linux Kernel
- 8. Why containers?Why containers? ➢Latency Physical hardware Linux Kernel Host Operating System Guest OS Virtual Machine Linux Kernelinit sshd init sshd init sshd bridge
- 9. What is LXD?Whatis LXD? ➢ A front-end for LXC ➢ Enables easier management of LXC containers
- 10. What is LXC?Whatis LXC? ➢ Linux Containers ➢ The initial project to create what we call containers today ➢ Userspace interface for the Linux kernel containment features
- 11. So why LXDthen?So why LXD then? ➢ RESTful API ➢ Ability to work with remote installations ➢ Ability to control multiple LXD nodes ➢ Better command line interface ➢ Easier management ➢ storage ➢ network ➢ limits ➢ migration (including live)
- 12. InstallationInstallation ➢ Works outof the box on recent Ubuntu ➢ On Debian and CentOS it is a bit annoying ➢ you need go 1.6+ ➢ latest lxc(2.0), which you can only build from source ➢ a lot of other dependencies ➢ it takes about an hour
- 13. So what canI do with it?So what can I do with it?
- 15. Marian HackMan Marinov<mm@1h.com> hackman @ irc.freenode.net https://github.com/hackman