Containers without docker

Mar 16, 2018Download as PPTX, PDF1 like595 views

This document discusses containers without Docker. It introduces alternatives to Docker like Runc, Podman, Buildah and Img for launching and building containers. It also discusses deploying Kubernetes using CRI-O as a container runtime instead of Docker. Key points covered include why consider non-Docker options, what containers and images are, and how to launch containers without Docker on Linux, Windows and in Kubernetes. Alternatives provide valuable choices and the future is seen as Kubernetes with CRI-O rather than Docker.

Containers without Docker
@Ben_Hall
Ben@BenHall.me.uk
Katacoda.com

Learn via Interactive Browser-Based Labs
Katacoda.com

Agenda
• Why?
• What is a Container?
• Launching a Container without Docker
• Building Containers without Docker
• Deploying Kubernetes using CRI-O

Docker - An open platform for distributed
applications for developers and sysadmins.

Docker isn’t the only
container runtime!

Docker is no longer about
building/launching Containers.
Runc and Containerd donated to
Linux Foundation and CNCF
“Docker” renamed to Moby

Docker on a CI/CD Server
• Need Privileged Permissions
• Install Docker
• Run daemon on host
• Provide access to Docker Server to CI Runner

What is a container?
https://www.katacoda.com/courses/co
ntainers-without-docker/what-is-a-
container

https://github.com/lizrice/containers-from-scratch

Launching Containers with Runc
https://www.katacoda.com/courses/co
ntainers-without-docker/running-
containers-with-runc

Launching Containers with Podman
https://www.katacoda.com/courses/co
ntainers-without-docker/running-
containers-with-podman

What is an image?
https://www.katacoda.com/courses/co
ntainers-without-docker/what-is-a-
image

Building Images with Buildah and
Img
https://www.katacoda.com/courses/containers-without-
docker/building-container-images-with-buildah
https://www.katacoda.com/courses/containers-without-
docker/building-container-images-with-img

https://github.com/containernetworking/cni/blob/a700ea864b5f1852d179ce83e8bc169f0b4a0ef4/scripts/docker-run.sh

Launching Containers with
Kubernetes without Docker?

Getting Started With CRI-O and
Kubeadm
https://www.katacoda.com/courses/co
ntainers-without-docker/getting-
started-with-kubeadm-crio

var cs = new ContainerSettings
{
SandboxPath = path,
Layers = layers,
KillOnClose = true,
NetworkId = HostComputeService.FindNatNetwork(),
};
using (var container = HostComputeService.CreateContainer(id.ToString(), cs))
{
Console.Out.WriteLine("starting container");
Console.Out.Flush();
container.Start();
var si = new ProcessStartInfo { CommandLine = command };
using (var process = container.CreateProcess(si))
{
Console.Out.Write(process.StandardOutput.ReadToEnd());
process.WaitForExit(5000);
Console.Out.WriteLine("process exited with {0}", process.ExitCode);
}
container.Shutdown(Timeout.Infinite);
}

[DllImport("vmcompute.dll", PreserveSig = false, ExactSpelling = true)]
IntPtr computeSystem;
h.CreateComputeSystem(id, JsonHelper.ToJson(hcsSettings), IntPtr.Zero, out computeSystem);
return Container.Initialize(id, computeSystem, settings.KillOnClose, h);

Done!
• Important to consider alternatives, leads to
different approaches and innovation
• Podman, Buildah, Img provide valuable
choices
• Kubernetes and CRI-O will be the future…

http://www.katacoda.com/

Thank you!
Questions? Feedback?
@Ben_Hall
www.Katacoda.com
Ben@BenHall.me.uk
Blog.BenHall.me.uk

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Containers without docker

1. Containers without Docker @Ben_Hall [email protected] Katacoda.com

3. WHOAMI?

4. Learn via Interactive Browser-Based Labs Katacoda.com

6. Agenda • Why? • What is a Container? • Launching a Container without Docker • Building Containers without Docker • Deploying Kubernetes using CRI-O

7. Docker - An open platform for distributed applications for developers and sysadmins.

8. Got us to agree on something!

9. Docker isn’t the only container runtime!

10. Docker is no longer about building/launching Containers. Runc and Containerd donated to Linux Foundation and CNCF “Docker” renamed to Moby

11. Docker on a CI/CD Server • Need Privileged Permissions • Install Docker • Run daemon on host • Provide access to Docker Server to CI Runner

13. Linux Kernel?

15. What is a container? https://www.katacoda.com/courses/co ntainers-without-docker/what-is-a- container

16. https://github.com/lizrice/containers-from-scratch

20. Launching Containers with Runc https://www.katacoda.com/courses/co ntainers-without-docker/running- containers-with-runc

21. Launching Containers with Podman https://www.katacoda.com/courses/co ntainers-without-docker/running- containers-with-podman

22. What is an image? https://www.katacoda.com/courses/co ntainers-without-docker/what-is-a- image

24. Building Images with Buildah and Img https://www.katacoda.com/courses/containers-without- docker/building-container-images-with-buildah https://www.katacoda.com/courses/containers-without- docker/building-container-images-with-img

25. What about Container Networks?

27. https://github.com/containernetworking/cni/blob/a700ea864b5f1852d179ce83e8bc169f0b4a0ef4/scripts/docker-run.sh

28. Launching Containers with Kubernetes without Docker?

31. Getting Started With CRI-O and Kubeadm https://www.katacoda.com/courses/co ntainers-without-docker/getting- started-with-kubeadm-crio

32. What about Windows Containers?

35. var cs = new ContainerSettings { SandboxPath = path, Layers = layers, KillOnClose = true, NetworkId = HostComputeService.FindNatNetwork(), }; using (var container = HostComputeService.CreateContainer(id.ToString(), cs)) { Console.Out.WriteLine("starting container"); Console.Out.Flush(); container.Start(); var si = new ProcessStartInfo { CommandLine = command }; using (var process = container.CreateProcess(si)) { Console.Out.Write(process.StandardOutput.ReadToEnd()); process.WaitForExit(5000); Console.Out.WriteLine("process exited with {0}", process.ExitCode); } container.Shutdown(Timeout.Infinite); }

36. [DllImport("vmcompute.dll", PreserveSig = false, ExactSpelling = true)] IntPtr computeSystem; h.CreateComputeSystem(id, JsonHelper.ToJson(hcsSettings), IntPtr.Zero, out computeSystem); return Container.Initialize(id, computeSystem, settings.KillOnClose, h);

38. Done! • Important to consider alternatives, leads to different approaches and innovation • Podman, Buildah, Img provide valuable choices • Kubernetes and CRI-O will be the future…

39. http://www.katacoda.com/

40. Thank you! Questions? Feedback? @Ben_Hall www.Katacoda.com [email protected] Blog.BenHall.me.uk

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