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Next Generation Tools for container technology Dan Walsh @rhatdan - PowerPoint PPT Presentation

Oct 23, 2023 •485 likes •1.36k views

Next Generation Tools for container technology Dan Walsh @rhatdan Please Stand Please read out loud all text in RED I Promise To say Container Registries Rather than Docker registries I Promise To say Container Images Rather than

  1. Next Generation Tools for container technology Dan Walsh @rhatdan

  2. Please Stand

  3. Please read out loud all text in RED

  4. I Promise

  5. To say Container Registries Rather than Docker registries

  6. I Promise

  7. To say Container Images Rather than Docker images

  8. I Promise

  9. To say Containers Rather than Docker Containers

  10. Sit Down

  13. What do you need to run a container Standard Definition of what makes up a container image. ● OCI Image Bundle Definition ○

  14. Introducing Skopeo https://github.com/containers/skopeo #nobigfatdaemons

  15. Skopeo ● $ skopeo inspect docker://docker.io/fedora ● $ skopeo copy docker://busybox:1-glibc atomic:myns/unsigned:streaming $ skopeo copy docker://busybox:latest dir:existingemptydirectory $ skopeo copy docker://busybox:latest oci:busybox_ocilayout:latest ● $ skopeo delete docker://localhost:5000/imagename:latest #nobigfatdaemons

  16. What do you need to run a container` Standard Definition of what makes up a container image. ● OCI Image Bundle Definition ○ Mechanism to pull images from a container registry to the host ● github.com/containers/image ○

  17. What do you need to run a container Standard Definition of what makes up a container image. ● OCI Image Bundle Definition ○ Mechanism to pull images from a container registry to the host ● github.com/containers/image ○ ● Ability to explode images onto COW file systems on disk github.com/containers/storage ○

  18. What do you need to run a container Standard Definition of what makes up a container image. ● OCI Image Bundle Definition ○ Mechanism to pull images from a container registry to the host ● github.com/containers/image ○ ● Ability to explode images onto COW file systems on disk github.com/containers/storage ○ Standard mechanism for running a container ● ○ OCI Runtime Spec (1.0) runc default implementation of OCI Runtime Spec (Same tool Docker uses to run containers) ○

  19. #nobigfatdaemons

  20. #nobigfatdaemons

  21. What does OpenShift/Kubernetes need run a container? CRI - Container Runtime Interface #nobigfatdaemons

  22. What does OpenShift/Kubernetes need run a container? CRI - Container Runtime Interface Kubernetes tells CRI to run Container Image: #nobigfatdaemons

  23. What does OpenShift/Kubernetes need run a container? CRI - Container Runtime Interface Kubernetes tells CRI to run Container Image: ● CRI needs to pull image from Container Registry #nobigfatdaemons

  24. What does OpenShift/Kubernetes need run a container? CRI - Container Runtime Interface Kubernetes tells CRI to run Container Image: ● CRI needs to pull image from Container Registry ● CRI Needs to store image on COW File system #nobigfatdaemons

  25. What does OpenShift/Kubernetes need run a container? CRI - Container Runtime Interface Kubernetes tells CRI to run Container Image: ● CRI needs to pull image from Container Registry ● CRI Needs to store image on COW File system ● CRI Needs to execute OCI Runtime #nobigfatdaemons

  26. Introducing CRI-O #nobigfatdaemons

  27. Introducing CRI-O CRI-O - OCI-based implementation of Kubernetes Container Runtime Interface Scope tied to kubernetes CRI ● ● Only supported user is kubernetes Uses standard components as building blocks ● “Nothing more, Nothing Less” #nobigfatdaemons

  28. #nobigfatdaemons

  29. #nobigfatdaemons

  30. #nobigfatdaemons

  31. S W A R M #nobigfatdaemons

  32. S W A R M #nobigfatdaemons

  33. M O B Y #nobigfatdaemons

  34. M O B Y #nobigfatdaemons

  35. M O B Y #nobigfatdaemons

  36. #nobigfatdaemons

  37. Overview of additional components oci-runtime-tools library is used to generate OCI configs for containers ● #nobigfatdaemons

  38. Overview of additional components oci-runtime-tools library is used to generate OCI configs for containers ● CNI is used for setting up networking ● ○ Tested with Flannel, Weave and openshift-sdn #nobigfatdaemons

  39. Overview of additional components oci-runtime-tools library is used to generate OCI configs for containers ● CNI is used for setting up networking ● ○ Tested with Flannel, Weave and openshift-sdn conmon is a utility for: ● Monitoring ○ Logging ○ Handling tty ○ Serving attach clients ○ Detecting and reporting OOM ○ #nobigfatdaemons

  40. Pod architecture (runc) conmon conmon conmon Infra Container Container A Container B (runc) (runc) Pod (ipc, net, pid namespaces, cgroups) #nobigfatdaemons

  41. Pod architecture (Kata Containers) conmon conmon kata-shim kata-shim Container A Container B (kata-runtime) (kata-runtime) Virtual Machine (ipc, net, pid namespaces, cgroups) #nobigfatdaemons Pod (net namespace, cgroups)

  42. Architecture #nobigfatdaemons

  43. Status All e2e, cri-tools, integration, 9 test suites, (>500) tests passing. ● No PRs merged without passing all the tests ○ #nobigfatdaemons

  44. Status All e2e, cri-tools, integration, 9 test suites, (>500) tests passing. ● No PRs merged without passing all the tests. ○ ● 1.0.7 (kube 1.7.x) supported. (December 2017) #nobigfatdaemons

  45. Status All e2e, cri-tools, integration, 9 test suites, (>500) tests passing. ● No PRs merged without passing all the tests. ○ ● 1.0.7 (kube 1.7.x) supported. (December 2017) 1.9.12 (kube 1.9.x) released. ● CRI-O fully supported in OpenShift 3.9 along with docker. ○ #nobigfatdaemons

  46. Status All e2e, cri-tools, integration, 9 test suites, (>500) tests passing. ● No PRs merged without passing all the tests. ○ ● 1.0.7 (kube 1.7.x) supported. (December 2017) 1.9.12 (kube 1.9.x) released. ● CRI-O fully supported in OpenShift 3.9 along with docker. ○ ● 1.10.6 (kube 1.10.x) released. #nobigfatdaemons

  47. Status All e2e, cri-tools, integration, 9 test suites, (>500) tests passing. ● No PRs merged without passing all the tests. ○ ● 1.0.7 (kube 1.7.x) supported. (December 2017) 1.9.12 (kube 1.9.x) released. ● CRI-O fully supported in OpenShift 3.9 along with docker. ○ ● 1.10.6 (kube 1.10.x) released. 1.11.2 (Kube 1.11.x) released ● #nobigfatdaemons

  48. Status All e2e, cri-tools, integration, 9 test suites, (>500) tests passing. ● No PRs merged without passing all the tests. ○ ● 1.0.7 (kube 1.7.x) supported. (December 2017) 1.9.12 (kube 1.9.x) released. ● CRI-O fully supported in OpenShift 3.9 along with docker. ○ ● 1.10.6 (kube 1.10.x) released. 1.11.2 (Kube 1.11.x) released ● 1.12.1 (Kube 1.12.x) released ● Goal for Openshift 4.0 is to fully support CRI-O by default. ● #nobigfatdaemons

  49. Status CRI-O is now powering nodes on OpenShift Online. #nobigfatdaemons

  50. " CRI-O just works for them, so they haven’t had much to say" #nobigfatdaemons

  51. Making running containers in production boring #nobigfatdaemons

  52. What else does OpenShift need? Ability to build container images ● Ability to push container images to container registries ● #nobigfatdaemons

  53. #nobigfatdaemons

  54. Introducing Buildah https://github.com/containers/buildah #nobigfatdaemons

  55. #nobigfatdaemons https://github.com/containers/buildah

  56. #nobigfatdaemons

  57. Coreutils for building containers. Simple interface #nobigfatdaemons

  58. Coreutils for building containers. Simple interface # ctr=$(buildah from fedora) #nobigfatdaemons

  59. Coreutils for building containers. Simple interface # ctr=$(buildah from fedora) # mnt=$(buildah mount $ctr) #nobigfatdaemons

  60. #nobigfatdaemons

  61. Coreutils for building containers. Simple interface # ctr=$(buildah from fedora) # mnt=$(buildah mount $ctr) # cp -R src $mnt #nobigfatdaemons

  62. Coreutils for building containers. Simple interface # ctr=$(buildah from fedora) # mnt=$(buildah mount $ctr) # cp -R src $mnt # dnf install --installroot=$mnt httpd #nobigfatdaemons

  63. Coreutils for building containers. Simple interface # ctr=$(buildah from fedora) # mnt=$(buildah mount $ctr) # cp -R src $mnt # dnf install --installroot=$mnt httpd # make install DESTDIR=$mnt #nobigfatdaemons

  64. Coreutils for building containers. Simple interface # ctr=$(buildah from fedora) # mnt=$(buildah mount $ctr) # cp -R src $mnt # dnf install --installroot=$mnt httpd # make install DESTDIR=$mnt # buildah config --entrypoint=/usr/sbin/test.sh --env foo=bar $ctr #nobigfatdaemons

  65. Coreutils for building containers. Simple interface # ctr=$(buildah from fedora) # mnt=$(buildah mount $ctr) # cp -R src $mnt # dnf install --installroot=$mnt httpd # make install DESTDIR=$mnt # buildah config --entrypoint=/usr/sbin/test.sh --env foo=bar $ctr # buildah commit $ctr myhttpd #nobigfatdaemons

  66. Coreutils for building containers. Simple interface # ctr=$(buildah from fedora) # mnt=$(buildah mount $ctr) # cp -R src $mnt # dnf install --installroot=$mnt httpd # make install DESTDIR=$mnt # buildah config --entrypoint=/usr/sbin/test.sh --env foo=bar $ctr # buildah commit $ctr myhttpd # buildah push myhttpd docker://rhatdan/myhttpd #nobigfatdaemons

  67. Dan Wait! #nobigfatdaemons

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