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Lxd the proper way of runing containers

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Marian Marinov
Marian Marinov

LXD container management

Engineering
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LXDLXD the proper waythe proper way of runningof running containerscontainers Marian HackMan Marinov Chief System Architect of SiteGround.com <mm@1h.com>
Who am I?Who am I?
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.
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
Why containers?Why containers? ➢ Latency Physical hardware Linux Kernel Host Operating System Guest OS Virtual Machine Linux Kernel
Why containers?Why containers? ➢ Latency Physical hardware Linux Kernel Host Operating System Guest OS Virtual Machine Linux Kernel
Why containers?Why containers? ➢ Latency Physical hardware Linux Kernel Host Operating System Guest OS Virtual Machine Linux Kernel Guest OS Virtual Machine Linux Kernel
Why containers?Why containers? ➢ Latency Physical hardware Linux Kernel Host Operating System Guest OS Virtual Machine Linux Kernelinit sshd init sshd init sshd bridge
What is LXD?What is LXD? ➢ A front-end for LXC ➢ Enables easier management of LXC containers
What is LXC?What is LXC? ➢ Linux Containers ➢ The initial project to create what we call containers today ➢ Userspace interface for the Linux kernel containment features
So why LXD then?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)
InstallationInstallation ➢ Works out of 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
So what can I do with it?So what can I do with it?
Marian HackMan Marinov <mm@1h.com> hackman @ irc.freenode.net https://github.com/hackman

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Lxd the proper way of runing containers

  • 1. LXDLXD the proper waythe proper way of runningof running containerscontainers Marian HackMan Marinov Chief System Architect of SiteGround.com <mm@1h.com>
  • 2. Who am I?Who am 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?What is LXD? ➢ A front-end for LXC ➢ Enables easier management of LXC containers
  • 10. What is LXC?What is LXC? ➢ Linux Containers ➢ The initial project to create what we call containers today ➢ Userspace interface for the Linux kernel containment features
  • 11. So why LXD then?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 out of 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 can I do with it?So what can I do with it?
  • 14.
  • 15. Marian HackMan Marinov <mm@1h.com> hackman @ irc.freenode.net https://github.com/hackman