Add documentation for crictl #8880

feiskyer · 2018-06-04T03:21:26Z

Add documentation for crictl.

Refer kubernetes-sigs/cri-tools#317

/cc @Random-Liu

k8sio-netlify-preview-bot · 2018-06-04T03:21:28Z

Deploy preview for kubernetes-io-vnext-staging processing.

Built with commit 737c662

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ajaeger · 2018-06-04T17:44:29Z

content/en/docs/concepts/configuration/manage-compute-resources-container.md

-  {{< note >}}
-  **Note**: The default quota period is 100ms. The minimum resolution of CPU quota is 1ms.
-  {{< /note >}}
+  {{< note >}}**Note**: The default quota period is 100ms. The minimum resolution of CPU quota is 1ms.{{ {{</ note >}}}


4 opening { - and three closing } is wrong- use two for both.

ajaeger · 2018-06-04T17:46:22Z

content/en/docs/reference/access-authn-authz/admission-controllers.md

@@ -477,10 +466,9 @@ This admission controller has the following behavior:
  1. Evaluate the pod's node selector against the namespace-specific whitelist defined the plugin configuration file.
     Conflicts result in rejection.

-{{< note >}}
 **Note:** PodNodeSelector allows forcing pods to run on specifically labeled nodes. Also see the PodTolerationRestriction 


Leave in, this is correct as is.

Random-Liu · 2018-06-04T18:09:07Z

@feiskyer Why are there so many commits?

Random-Liu · 2018-06-04T18:12:16Z

content/en/docs/tasks/debug-application-cluster/crictl.md

+e1c83b0b8d481d4af8ba98d5f7812577fc175a37b10dc824335951f52addbb4e
+# crictl pods
+PODSANDBOX ID                                                      NAME                STATE
+e1c83b0b8d481d4af8ba98d5f7812577fc175a37b10dc824335951f52addbb4e   nginx-sandbox       SANDBOX_READY


Use up-to-date output as example.

Random-Liu · 2018-06-04T18:12:53Z

content/en/docs/tasks/debug-application-cluster/crictl.md

+
+# crictl create e1c83b0b8d481d4af8ba98d5f7812577fc175a37b10dc824335951f52addbb4e container-config.json podsandbox-config.json
+0a2c761303163f2acaaeaee07d2ba143ee4cea7e3bde3d32190e2a36525c8a05
+# crictl ps -a


Random-Liu · 2018-06-04T18:13:02Z

content/en/docs/tasks/debug-application-cluster/crictl.md

+```sh
+# crictl start 0a2c761303163f2acaaeaee07d2ba143ee4cea7e3bde3d32190e2a36525c8a05
+0a2c761303163f2acaaeaee07d2ba143ee4cea7e3bde3d32190e2a36525c8a05
+# crictl ps


Random-Liu · 2018-06-04T18:14:58Z

@feiskyer Can we link this in "Monitor, Log, and Debug" section on https://kubernetes.io/docs/tasks/debug-application-cluster/debug-application-introspection/?

mdlinville · 2018-06-04T18:37:57Z

I rebased to resolve conflicts.

feiskyer · 2018-06-05T06:52:52Z

@Random-Liu Addressed comments. PTAL

Random-Liu · 2018-06-05T08:58:05Z

content/en/docs/tasks/debug-application-cluster/crictl.md

+- Random-Liu
+- feiskyer
+- mrunalp
+title: Crictl


Let's use a more descriptive name - e.g. "Inspect Kubernetes node with crictl".

Random-Liu · 2018-06-05T08:59:55Z

content/en/docs/tasks/debug-application-cluster/crictl.md

+title: Crictl
+---
+
+crictl provides a CLI for CRI-compatible container runtimes. This allows the CRI runtime developers to debug their runtime without needing to set up Kubernetes components.


This document is for users, not "runtime developers".

It helps users inspect and debug container runtime and applications on a Kubernetes node.

Random-Liu · 2018-06-05T09:00:19Z

content/en/docs/tasks/debug-application-cluster/crictl.md

+
+crictl provides a CLI for CRI-compatible container runtimes. This allows the CRI runtime developers to debug their runtime without needing to set up Kubernetes components.
+
+crictl is GA since v1.11.0 and is hosted at the [cri-tools](https://github.com/kubernetes-incubator/cri-tools) repository. We encourage the CRI developers to report bugs or help extend the coverage by adding more functionalities.


Random-Liu · 2018-06-05T09:01:38Z

content/en/docs/tasks/debug-application-cluster/crictl.md

+
+## Examples
+
+### Run pod sandbox with config file


Move create sandbox and container to the end, and add some warning like "It is not recommended to create sandbox and container on a Kubernetes node. It will be stopped and deleted by Kubelet"

Random-Liu · 2018-06-05T09:02:13Z

content/en/docs/tasks/debug-application-cluster/crictl.md

+f84dd361f8dc51518ed291fbadd6db537b0496536c1d2d6c05ff943ce8c9a54f
+```
+
+List pod sandboxes and check the sandbox is in Ready state:


This is the feature we want to demonstrate. Please include more sandboxes, and also include a fitler example.

Random-Liu · 2018-06-05T09:02:44Z

content/en/docs/tasks/debug-application-cluster/crictl.md

+Image is up to date for busybox@sha256:141c253bc4c3fd0a201d32dc1f493bcf3fff003b6df416dea4f41046e0f37d47
+```
+
+List images and check the busybox image has been pulled:


This is important.

Random-Liu · 2018-06-05T09:02:55Z

content/en/docs/tasks/debug-application-cluster/crictl.md

+k8s.gcr.io/pause    3.1                 da86e6ba6ca19       742kB
+```
+
+### Create container in the pod sandbox with config file


Move container creation bottom and add warning.

Random-Liu · 2018-06-05T09:03:08Z

content/en/docs/tasks/debug-application-cluster/crictl.md

+
+List containers and check the container is in Created state:
+
+```sh


This is more important, and add filer example.

Random-Liu · 2018-06-05T09:03:48Z

content/en/docs/tasks/debug-application-cluster/crictl.md

+3e025dd50a72d       busybox             32 seconds ago      Created             busybox             0
+```
+
+### Start container


Move to bottom.

Random-Liu · 2018-06-05T09:03:52Z

content/en/docs/tasks/debug-application-cluster/crictl.md

+3e025dd50a72d       busybox             About a minute ago   Running             busybox             0
+```
+
+### Exec a command in container


This is important.

feiskyer · 2018-06-06T02:56:21Z

@Random-Liu Thanks for reviewing. Addressed comments. PTAL

Random-Liu · 2018-06-06T17:16:04Z

/lgtm

feiskyer · 2018-06-07T02:05:26Z

@Random-Liu thanks.

ping @mistyhacks for approval.

Random-Liu · 2018-06-07T06:57:48Z

@mistyhacks Can we get this in for 1.11? We are going to graduate crictl to GA this release. We'd like to have a k8s.io doc. Thanks a lot! :)

mdlinville · 2018-06-08T23:27:08Z

I just pushed a copyedit commit. PTAL @feiskyer and all, and ensure that I kept all of the technical details intact. You can preview the content at https://deploy-preview-8880--kubernetes-io-vnext-staging.netlify.com/docs/tasks/debug-application-cluster/crictl/.

Some of the things I did:

Lots of rewording
Use the Task template
Remove the specific info about the subcommands and flags that can be discovered from the crictl help output so that it doesn't drift from reality as flags and subcommands get added and modified
Clean up code examples to adhere to the style guide

If you want the detailed command-line reference contents back, I believe you should add them to a new file in /content/en/docs/reference/command-line-tools-reference/. Maybe @steveperry-53 can provide guidance here as I think he knows more about these files than I do.

I have one pending question about how you configure your image registry so that crictl works, or what prerequisites exist for that. Are there actually more prerequisites than I have listed? I placed a TODO in this part of the file.

/hold

Signed-off-by: Misty Stanley-Jones <mistyhacks@google.com>

Bradamant3 · 2018-06-10T18:21:19Z

@feiskyer @mistyhacks Most of the the docs/files in /content/en/docs/reference/command-line-tools-reference/ are generated from strings in code files, and thus contain exactly the same content as the CLI help. If you want this kind of reference doc, it makes more sense to generate it than to maintain it manually. As Misty says, there's a high risk of drift.

I recommend taking Misty's edits for 1.11, including removing the information about subcommands and flags, and considering for 1.12 whether you want to generate docs. We have a couple of different models to work from. If you want to discuss generating docs further, please bring it up as a proposal to sig-docs. Thanks!

feiskyer · 2018-06-11T01:59:45Z

@mistyhacks Thanks for excellent improvement of this document.

I recommend taking Misty's edits for 1.11, including removing the information about subcommands and flags, and considering for 1.12 whether you want to generate docs.

lgtm.

I have one pending question about how you configure your image registry so that crictl works, or what prerequisites exist for that. Are there actually more prerequisites than I have listed?

@mistyhacks No other special prerequisites except let container runtime running. Have you encountered any issues with this?

feiskyer · 2018-06-11T02:02:07Z

content/en/docs/tasks/debug-application-cluster/crictl.md


-## Usage
+In order to use `crictl`, you need access to a Linux system that is not a
+running Kubernetes cluster. 


crictl could be running with Kubernetes cluster. It can help for troubleshooting runtime issues.

The only limitation is that: if you create a container with crictl directly, the container will be stopped and removed by kubelet.

feiskyer · 2018-06-11T02:02:53Z

content/en/docs/tasks/debug-application-cluster/crictl.md

-```sh
-crictl SUBCOMMAND [FLAGS]
-```
+For `crictl` to be able to pull images, you need TODO THIS IS NOT CLEAR TO ME


No special requirements, just crictl pull <image> should work (of course CRI runtime should be running).

feiskyer · 2018-06-12T02:22:22Z

@mistyhacks Could you remove the TODO and get this in for v1.11?

/hold cancel

mdlinville · 2018-06-12T20:26:44Z

/lgtm
/approve

k8s-ci-robot · 2018-06-12T20:26:51Z

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mdlinville · 2018-06-12T21:03:47Z

oops
/hold cancel

* Add documentation for crictl * Copyedit Signed-off-by: Misty Stanley-Jones <mistyhacks@google.com> * Final copyedit

* Seperate priority and preemption (#8144) * Doc about PID pressure condition. (#8211) * Doc about PID pressure condition. Signed-off-by: Da K. Ma <klaus1982.cn@gmail.com> * "so" -> "too" * Update version selector for 1.11 * StorageObjectInUseProtection is GA (#8291) * Feature gate: StorageObjectInUseProtection is GA Update feature gate reference for 1.11 * Trivial commit to re-trigger Netlify * CRIContainerLogRotation is Beta in 1.11 (#8665) * Seperate priority and preemption (#8144) * CRIContainerLogRotation is Beta in 1.11 xref: kubernetes/kubernetes#64046 * Bring StorageObjectInUseProtection feature to GA (#8159) * StorageObjectInUseProtection is GA (#8291) * Feature gate: StorageObjectInUseProtection is GA Update feature gate reference for 1.11 * Trivial commit to re-trigger Netlify * Bring StorageObjectInUseProtection feature to GA StorageObjectInUseProtection is Beta in K8s 1.10. It's brought to GA in K8s 1.11. * Fixed typo and added feature state tags. * Remove KUBE_API_VERSIONS doc (#8292) The support to the KUBER_API_VERSIONS environment variable is completely dropped (no deprecation). This PR removes the related doc in release-1.11. xref: kubernetes/kubernetes#63165 * Remove InitialResources from admission controllers (#8293) The feature (was experimental) is dropped in 1.11. xref: kubernetes/kubernetes#58784 * Remove docs related to in-tree support to GPU (#8294) * Remove docs related to in-tree support to GPU The in-tree support to GPU is completely removed in release 1.11. This PR removes the related docs in release-1.11 branch. xref: kubernetes/kubernetes#61498 * Update content updated by PR to Hugo syntax Signed-off-by: Misty Stanley-Jones <mistyhacks@google.com> * Update the doc about extra volume in kubeadm config (#8453) Signed-off-by: Xianglin Gao <xianglin.gxl@alibaba-inc.com> * Update CRD Subresources for 1.11 (#8519) * coredns: update notes in administer-cluster/coredns.md (#8697) CoreDNS is installed by default in 1.11. Add notes on how to install kube-dns instead. Update notes about CoreDNS->CoreDNS upgrades as in 1.11 the Corefile is retained. Add example on upgrading from kube-dns to CoreDNS. * kubeadm-alpha: CoreDNS related changes (#8727) Update note about CoreDNS feature gate. This change also updates a tab as a kubeadm sub-command will change. It looks for a new generated file: generated/kubeadm_alpha_phase_addon_coredns.md instead of: generated/kubeadm_alpha_phase_addon_kube-dns.md * Update cloud controller manager docs to beta 1.11 (#8756) * Update cloud controller manager docs to beta 1.11 * Use Hugo shortcode for feature state * kubeadm-upgrade: include new command `kubeadm upgrade diff` (#8617) Also: - Include note that this was added in 1.11. - Modify the note about upgrade guidance. * independent: update CoreDNS mentions for kubeadm (#8753) Give CoreDNS instead of kube-dns examples in: - docs/setup/independent/create-cluster-kubeadm.md - docs/setup/independent/troubleshooting-kubeadm.md * update 1.11 --server-print info (#8870) * update 1.11 --server-print info * Copyedit * Mark ExpandPersistentVolumes feature to beta (#8778) * Update version selector for 1.11 * Mark ExpandPersistentVolumes Beta xref: kubernetes/kubernetes#64288 * fix shortcode, add placeholder files to fix deploy failures (#8874) * declare ipvs ga (#8850) * kubeadm: update info about CoreDNS in kubeadm-init.md (#8728) Add info to install kube-dns instead of CoreDNS, as CoreDNS is the default DNS server in 1.11. Add notes that kubeadm config images can be used to list and pull the required images in 1.11. * kubeadm: update implementation-details.md about CoreDNS (#8829) - Replace examples from kube-dns to CoreDNS - Add notes about the CoreDNS feature gate status in 1.11 - Add note that the service name for CoreDNS is also called `kube-dns` * Update block device support for 1.11 (#8895) * Update block device support for 1.11 * Copyedits * Fix typo 'fiber channel' (#8957) Signed-off-by: Misty Stanley-Jones <mistyhacks@google.com> * kubeadm-upgrade: add the 'node [config]' sub-command (#8960) - Add includes for the generated pages - Include placeholder generated pages * kubeadm-init: update the example for the MasterConfiguration (#8958) - include godocs link for MasterConfiguration - include example MasterConfiguration - add note that `kubeadm config print-default` can be used * kubeadm-config: include new commands (#8862) Add notes and includes for these new commands in 1.11: - kubeadm config print-default - kubeadm config migrate - kubeadm config images list - kubeadm config images pull Include placeholder generated files for the above. * administer-cluster/coredns: include more changes (#8985) It was requested that for this page a couple of methods should be outlined: - manual installation for CoreDNS explained at the Kubernetes section of the GitHub project for CoreDNS - installation and upgrade via kubeadm Make the above changes and also add a section "About CoreDNS". This commit also lowercases a section title. * Update CRD subresources doc for 1.11 (#8918) * Add docs for volume expansion and online resizing (#8896) * Add docs for volume expansion going beta * Copyedit * Address feedback * Update exec plugin docs with TLS credentials (#8826) * Update exec plugin docs with TLS credentials kubernetes/kubernetes#61803 implements TLS client credential support for 1.11. * Copyedit * More copyedits for clarification * Additional copyedit * Change token->credential * NodeRestriction admission prevents kubelet taint removal (#8911) * dns-custom-namerserver: break down the page into mutliple sections (#8900) * dns-custom-namerserver: break down the page into mutliple sections This page is currently about kube-dns and is a bit outdated. Introduce the heading `# Customizing kube-dns`. Introduce a separate section about CoreDNS. * Copyedits, fix headings for customizing DNS Hey Lubomir, I coypedited pretty heavily because this workflow is so much easier for docs and because I'm trying to help improve everything touching kubeadm as much as possible. But there's one outstanding issue wrt headings and intro content: you can't add a heading 1 to a topic to do what you wanted to do. The page title in the front matter is rendered as a heading 1 and everything else has to start at heading 2. (We still need to doc this better in the docs contributing content, I know.) Instead, I think we need to rewrite the top-of-page intro content to explain better the relationship between kube-dns and CoreDNS. I'm happy to write something, but I thought I'd push this commit first so you can see what I'm doing. Hope it's all clear -- ping here or on Slack with any questions ~ Jennifer * Interim fix for talking about CoreDNS * Fix CoreDNS details * PSP readOnly hostPath (#8898) * Add documentation for crictl (#8880) * Add documentation for crictl * Copyedit Signed-off-by: Misty Stanley-Jones <mistyhacks@google.com> * Final copyedit * VolumeSubpathEnvExpansion alpha feature (#8835) * Note that Heapster is deprecated (#8827) * Note that Heapster is deprecated This notes that Heapster is deprecated, and migrates the relevant docs to talk about metrics-server or other solutions by default. * Copyedits and improvements Signed-off-by: Misty Stanley-Jones <mistyhacks@google.com> * Address feedback * fix shortcode to troubleshoot deploy (#9057) * update dynamic kubelet config docs for v1.11 (#8766) * update dynamic kubelet config docs for v1.11 * Substantial copyedit * Address feedback * Reference doc for kubeadm (release-1.11) (#9044) * Reference doc for kubeadm (release-1.11) * fix shortcode to troubleshoot deploy (#9057) * Reference doc for kube-components (release-1.11) (#9045) * Reference doc for kube-components (release-1.11) * Update cloud-controller-manager.md * fix shortcode to troubleshoot deploy (#9057) * Documentation on lowercasing kubeadm init apiserver SANs (#9059) * Documentation on lowercasing kubeadm init apiserver SANs * fix shortcode to troubleshoot deploy (#9057) * Clarification in dynamic Kubelet config doc (#9061) * Promote sysctls to Beta (#8804) * Promote sysctls to Beta * Copyedits Signed-off-by: Misty Stanley-Jones <mistyhacks@google.com> * Review comments * Address feedback * More feedback * kubectl reference docs for 1.11 (#9080) * Update Kubernetes API 1.11 ref docs (#8977) * Update v1alpha1 to v1beta1. * Adjust left nav for 1.11 ref docs. * Trim list of old ref docs. * Update Federation API ref docs for 1.11. (#9064) * Update Federation API ref docs for 1.11. * Add titles. * Update definitions.html * CRD versioning Public Documentation (#8834) * CRD versioning Public Documentation * Copyedit Signed-off-by: Misty Stanley-Jones <mistyhacks@google.com> * Address feedback * More rewrites * Address feedback * Update main CRD page in light of versioning * Reorg CRD docs * Further reorg * Tweak title * CSI documentation update for raw block volume support (#8927) * CSI documetation update for raw block volume support * minor edits for "CSI raw block volume support" Some small grammar and style nits. * minor CSIBlockVolume edits * Update kubectl component ref page for 1.11. (#9094) * Update kubectl component ref page for 1.11. * Add title. Replace stevepe with username. * crd versioning doc: fix nits (#9142) * Update `DynamicKubeletConfig` feature to beta (#9110) xref: kubernetes/kubernetes#64275 * Documentation for dynamic volume limits based on node type (#8871) * add cos for storage limits * Update docs specific for aws and gce * fix some minor things * Update storage-limits.md * Add k8s version to feature-state shortcode * The Doc update for ScheduleDaemonSetPods (#8842) Signed-off-by: Da K. Ma <klaus1982.cn@gmail.com> * Update docs related to PersistentVolumeLabel admission control (#9109) The said admission controller is disabled by default in 1.11 (kubernetes/kubernetes#64326) and scheduled to be removed in future release. * client exec auth: updates for 1.11 (#9154) * Updates HA kubeadm docs (#9066) * Updates HA kubeadm docs Signed-off-by: Chuck Ha <ha.chuck@gmail.com> * kubeadm HA - Add stacked control plane steps * ssh instructions and some typos in the bash scripts Signed-off-by: Chuck Ha <ha.chuck@gmail.com> * Fix typos and copypasta errors * Fix rebase issues * Integrate more changes Signed-off-by: Chuck Ha <ha.chuck@gmail.com> * copyedits, layout and formatting fixes * final copyedits * Adds a sanity check for load balancer connection Signed-off-by: Chuck Ha <ha.chuck@gmail.com> * formatting fixes, copyedits * fix typos, formatting * Document the Pod Ready++ feature (#9180) Closes: #9107 Xref: kubernetes/kubernetes#64057 * Mention 'KubeletPluginsWatcher' feature (#9177) * Mention 'KubeletPluginsWatcher' feature This feature is more developers oriented than users oriented, so simply mention it in the feature gate should be fine. In future, when the design doc is migrated from Google doc to the kubernetes/community repo, we can add links to it for users who want to dig deeper. Closes: #9108 Xref: kubernetes/kubernetes#63328, kubernetes/kubernetes#64605 * Copyedit * Amend dynamic volume list docs (#9181) The dynamic volume list feature has been documented but the feature gate related was not there yet. Closes: #9105 * Document for service account projection (#9182) This adds docs for the service account projection feature. Xref: kubernetes/kubernetes#63819, kubernetes/community#1973 Closes: #9102 * Update pod priority and preemption user docs (#9172) * Update pod priority and preemption user docs * Copyedit * Documentation on setting node name with Kubeadm (#8925) * Documentation on setting node name with Kubeadm * copyedit * Add kubeadm upgrade docs for 1.11 (#9089) * Add kubeadm upgrade docs for 1.11 * Initial docs review feedback * Add 1-11 to outline * Fix formatting on tab blocks * Move file to correct location * Add `kubeadm upgrade node config` step * Overzealous ediffing * copyedit, fix lists and headings * clarify --force flag for fixing bad state * Get TOML ready for 1.11 release * Blog post for 1.11 release (#9254) * Blog post for 1.11 release * Update 2018-06-26-kubernetes-1.11-release-announcement.md * Update 2018-06-26-kubernetes-1.11-release-announcement.md * Update 2018-06-26-kubernetes-1.11-release-announcement.md

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Add crictl document in k8s.io kubernetes-sigs/cri-tools#317

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Add documentation for crictl

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Copyedit

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Signed-off-by: Misty Stanley-Jones <mistyhacks@google.com>

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Final copyedit

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mdlinville pushed a commit that referenced this pull request Jun 20, 2018

Add documentation for crictl (#8880)

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* Add documentation for crictl * Copyedit Signed-off-by: Misty Stanley-Jones <mistyhacks@google.com> * Final copyedit

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Add documentation for crictl (#8880)

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* Add documentation for crictl * Copyedit Signed-off-by: Misty Stanley-Jones <mistyhacks@google.com> * Final copyedit

mdlinville pushed a commit that referenced this pull request Jun 27, 2018

Add documentation for crictl (#8880)

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* Add documentation for crictl * Copyedit Signed-off-by: Misty Stanley-Jones <mistyhacks@google.com> * Final copyedit

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mdlinville commented Jun 12, 2018


		crictl provides a CLI for CRI-compatible container runtimes. This allows the CRI runtime developers to debug their runtime without needing to set up Kubernetes components.

		crictl is GA since v1.11.0 and is hosted at the [cri-tools](https://github.com/kubernetes-incubator/cri-tools) repository. We encourage the CRI developers to report bugs or help extend the coverage by adding more functionalities.


		List containers and check the container is in Created state:

		```sh

Add documentation for crictl #8880

Add documentation for crictl #8880

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