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5th chunk of `content/en/blog/_posts/2017-11-00-Containerd-Container-Runtime-Options-Kubernetes.md`
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2. cri-containerd uses containerd to create and start a special [pause container](https://www.ianlewis.org/en/almighty-pause-container) (the _sandbox container_) and put that container inside the pod’s cgroups and namespace (steps omitted for brevity);
3. cri-containerd configures the pod’s network namespace using CNI;
4. Kubelet subsequently calls cri-containerd, via the CRI image service API, to pull the application container image;
5. cri-containerd further uses containerd to pull the image if the image is not present on the node;
6. Kubelet then calls cri-containerd, via the CRI runtime service API, to create and start the application container inside the pod using the pulled container image;
7. cri-containerd finally calls containerd to create the application container, put it inside the pod’s cgroups and namespace, then to start the pod’s new application container.
After these steps, a pod and its corresponding application container is created and running.



## Status
Cri-containerd v1.0.0-alpha.0 was released on Sep. 25, 2017.  

It is feature complete. All Kubernetes features are supported.  

All [CRI validation tests](https://github.com/kubernetes/community/blob/master/contributors/devel/sig-node/cri-validation.md) have passed. (A CRI validation is a test framework for validating whether a CRI implementation meets all the requirements expected by Kubernetes.)  

All regular [node e2e tests](https://github.com/kubernetes/community/blob/master/contributors/devel/sig-testing/e2e-tests.md) have passed. (The Kubernetes test framework for testing Kubernetes node level functionalities such as managing pods, mounting volumes etc.)  

To learn more about the v1.0.0-alpha.0 release, see the [project repository](https://github.com/kubernetes-incubator/cri-containerd/releases/tag/v1.0.0-alpha.0).



## Try it Out

For a multi-node cluster installer and bring up steps using ansible and kubeadm, see [this repo link](https://github.com/kubernetes-incubator/cri-containerd/blob/master/contrib/ansible/README.md).  

For creating a cluster from scratch on Google Cloud, see [Kubernetes the Hard Way](https://github.com/kelseyhightower/kubernetes-the-hard-way).  

For a custom installation from release tarball, see [this repo link](https://github.com/kubernetes-incubator/cri-containerd/blob/master/docs/installation.md).
Title: Cri-containerd Workflow Completion, Status, and Usage
Summary
The text outlines the final steps in cri-containerd's workflow for creating a pod and application container. It details how cri-containerd configures the pod's network, pulls the application container image, creates and starts the application container within the pod, and manages cgroups and namespaces. The text also provides information on the status of cri-containerd v1.0.0-alpha.0, including its feature completeness, successful completion of CRI validation and node e2e tests. Links are provided for learning more about the release and trying it out with multi-node cluster installers, Google Cloud, and custom installations.