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website/content/en/docs/tasks/configure-pod-container/configure-pod-initialization.md
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Jim Angel 851ef58fa8 Official 1.14 Release Docs (#13174) 
* Official documentation on Poseidon/Firmament, a new multi-scheduler support for K8S. (#11752)

* Added documentation about Poseidon-Firmament scheduler

* Fixed some style issues.

* Udpated the document as per the review comments.

* Fixed some typos and updated the document

* Updated the document as per the review comments.

* Document timeout attribute for kms-plugin. (#12158)

See 72540.

* Official documentation on Poseidon/Firmament, a new multi-scheduler  (#12343)

* Removed the old version of the Poseidon documentation. Incorrect location.

* Official documentation on Poseidon/Firmament, a new multi-scheduler support for K8S (#12069)

* Official documentation on Poseidon/Firmament, a new multi-scheduler support for K8S. (#11752)

* Added documentation about Poseidon-Firmament scheduler

* Fixed some style issues.

* Udpated the document as per the review comments.

* Fixed some typos and updated the document

* Updated the document as per the review comments.

* Updated the document as per review comments. Added config details.

* Updated the document as per the latest review comments. Fixed nits

* Made changes as per latest suggestions.

* Some more changes added.

* Updated as per suggestions.

* Changed the release process section.

* SIG Docs edits

Small edits to match style guidelines.

* add plus to feature state

* capitalization

* revert feature state shortcode

since this is a Kubernetes extension, not a direct feature, it shouldn't use the regular feature state tagging.

(cherry picked from commit 7730c1540b)

* Remove initializers from doc. It will be removed in 1.14 (#12331)

* kubeadm: Document CRI auto detection functionality (#12462)

Signed-off-by: Rostislav M. Georgiev <rostislavg@vmware.com>

* Minor doc change for GAing Pod DNS Config (#12514)

* Graduate ExpandInUsePersistentVolumes feature to beta (#10574)

* Rename 2018-11-07-grpc-load-balancing-with-linkerd.md.md file (#12594)

* Add dynamic percentage of node scoring to user docs (#12235)

* Add dynamic percentage of node scoring to user docs

* addressed review comments

* delete special symbol (#12445)

* Update documentation for VolumeSubpathEnvExpansion (#11843)

* Update documentation for VolumeSubpathEnvExpansion

* Address comments - improve descriptions

* Graduate Pod Priority and Preemption to GA (#12428)

* Added Instana links to the documentation (#12977)

* Added link to the Instana Kubernetes integration

* Added Instana link for services section

Added Instana and a link to the Kubernetes integration to the analytics services section and broadened the scope to APM, monitoring and analytics.

* Oxford comma /flex

* More Oxford commas, because they matter

* Update kubectl plugins to stable (#12847)

* documentation for CSI topology beta (#12889)

* Document changes to default RBAC discovery ClusterRole(Binding)s (#12888)

* Document changes to default RBAC discovery ClusterRole(Binding)s

Documentation for https://github.com/kubernetes/enhancements/issues/789 and https://github.com/kubernetes/kubernetes/pull/73807

* documentation review feedback

* CSI raw block to beta (#12931)

* Change incorrect string raw to block (#12926)

Fixes #12925

* Update documentation on node OS/arch labels (#12976)

These labels have been promoted to GA:
https://github.com/kubernetes/enhancements/issues/793

* local pv GA doc updates (#12915)

* Publish CRD OpenAPI Documentation (#12910)

* add documentation for CustomResourcePublishOpenAPI

* address comments

fix links, ordered lists, style and typo

* kubeadm: add document for upgrading from 1.13 to 1.14 (single CP and HA) (#13189)

* kubeadm: add document for upgrading from 1.13 to 1.14

- remove doc for upgrading 1.10 -> 1.11

* kubeadm: apply amends to upgrade-1.14 doc

* kubeadm: apply amends to upgrade-1.14 doc (part2)

* kubeadm: apply amends to upgrade-1.14 doc (part3)

* kubeadm: add note about "upgrade node experimental-control-plane"

+ add comment about `upgrade plan`

* kubeadm: add missing "You should see output similar to this"

* fix bullet indentation (#13214)

* mark PodReadinessGate GA (#12800)

* Update RuntimeClass documentation for beta (#13043)

* Update RuntimeClass documentation for beta

* Update feature gate & add upgrade section

* formatting fixes

* Highlight upgrade action required

* Address feedback

* CSI ephemeral volume alpha documentation (#10934)

* update kubectl documentation (#12867)

* update kubectl documentation

* add document for Secret/ConfigMap generators

* replace `kubectl create -f` by `kubectl apply -f`

* Add page for kustomization support in kubectl

* fix spelling errors and address comments

* Documentation for Windows GMSA feature (#12936)

* Documentation for Windows GMSA feature

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Enhancements to GMSA docs

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Fix links

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Fix GMSA link

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Add GMSA feature flag in feature flag list

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Relocate GMSA to container configuration

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Add example for container spec

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Remove changes in Windows index

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Update configure-gmsa.md

* Update configure-gmsa.md

* Update configure-gmsa.md

* Update configure-gmsa.md

* Rearrange the steps into two sections and other edits

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Fix links

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Add reference to script to generate GMSA YAMLs

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Some more clarifications for GMSA

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* HugePages graduated to GA (#13004)

* HugePages graduated to GA

* fixing nit for build

* Docs for node PID limiting (https://github.com/kubernetes/kubernetes/pull/73651) (#12932)

* kubeadm: update the reference documentation for 1.14 (#12911)

* kubeadm: update list of generated files for 1.14

NOTE: PLACEHOLDERS! these files are generated by SIG Docs each
release, but we need them to pass the k/website PR CI.

- add join_phase* (new sub phases of join)
- add init_phase_upload-certs.md (new upload certs phase for init)
- remove alpha-preflight (now both init and join have this)

* kubeadm: update reference docs includes for 1.14

- remove includes from alpha.md
- add upload-certs to init-phase.md
- add join-phase.md and it's phases

* kubeadm: update the editorial content of join and init

- cleanup master->control-plane node
- add some notes about phases and join
- remove table about pre-pulling images
- remove outdated info about self-hosting

* kubeadm: update target release for v1alpha3 removal

1.14 -> 1.15

* kubeadm: copy edits for 1.14 reference docs (part1)

* kubeadm: use "shell" for code blocks

* kubeadm: update the 1.14 HA guide (#13191)

* kubeadm: update the 1.14 HA guide

* kubeadm: try to fix note/caution indent in HA page

* kubeadm: fix missing sudo and minor amends in HA doc

* kubeadm: apply latest amends to the HA doc for 1.14

* fixed a few missed merge conflicts

* Admission Webhook new features doc (#12938)

- kubernetes/kubernetes#74998
- kubernetes/kubernetes#74477
- kubernetes/kubernetes#74562

* Clarifications and fixes in GMSA doc (#13226)

* Clarifications and fixes in GMSA doc

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Update configure-gmsa.md

* Reformat to align headings and pre-reqs better

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Reformat to align headings and pre-reqs better

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Reformat to fix bullets

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Reword application of sample gmsa

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Update configure-gmsa.md

* Address feedback to use active voice

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Address feedback to use active voice

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* RunAsGroup documentation for Progressing this to Beta (#12297)

* start serverside-apply documentation (#13077)

* start serverside-apply documentation

* add more concept info on server side apply

* Update api concepts

* Update api-concepts.md

* fix style issues

* Document CSI update (#12928)

* Document CSI update

* Finish CSI documentation

Also fix mistake with  ExpandInUsePersistentVolumes documented as beta

* Overall docs for CSI Migration feature (#12935)

* Placeholder docs for CSI Migration feature

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Address CR comments and update feature gates

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Add mappings for CSI plugins

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Add sections for AWS and GCE PD migration

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Add docs for Cinder and CSI Migration info

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Clarify scope to volumes with file system

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Change the format of EBS and Cinder CSI Migration sections to follow the GCE template

Signed-off-by: Deep Debroy <ddebroy@docker.com>

* Windows documentation updates for 1.14 (#12929)

* Updated the note to indicate doc work for 1.14

* first attempt at md export from gdoc

* simplifyig

* big attempt

* moving DRAFT windows content to PR for review

* moving content to PR in markdown for review

* updated note tags

* Delete windows-contributing.md

deleting this file as it is already ported to the github contributor guide

* fixed formatting in intro and cluster setup guide

* updating formatting for running containers guide

* rejiggered end of troubleshooting

* fixed minor typos

* Clarified the windows binary download step

* Update _index.md

making updates based on feedback

* Update _index.md

updating ovn-kubernetes docs

* Update _index.md

* Update _index.md

* updating relative docs links

updating all the links to be relative links to /docs

* Update _index.md

* Update _index.md

updates for windows services and ovn-kubernetes

* formatted for correct step numbering

* fix typos

* Update _index.md

updates for flannel PR in troubleshooting

* Update _index.md

* Update _index.md

updating a few sections like roadmap, services, troubleshooting/filing tickets

* Update _index.md

* Update _index.md

* Update _index.md

* Fixed a few whitespace issues

* Update _index.md

* Update _index.md

* Update _index.md

* add section on upgrading CoreDNS (#12909)

* documentation for kubelet resource metrics endpoint (#12934)

* windows docs updates for 1.14 (#13279)

* Delete sample-l2bridge-wincni-config.json

this file is not used anywhere

* Update _index.md

* Update _index.md

* Update _index.md

* Update _index.md

* Update _index.md

* Rename content/en/docs/getting-started-guides/windows/_index.md to content/en/docs/setup/windows/_index.md

moving to new location

* Delete flannel-master-kubectl-get-ds.png

* Delete flannel-master-kubeclt-get-pods.png

* Delete windows-docker-error.png

* Add files via upload

* Rename _index.md to add-windows-nodes.md

* Create _index.md

* Update _index.md

* Update add-windows-nodes.md

* Update add-windows-nodes.md

* Create user-guide-windows-nodes.md

* Create user-guide-windows-containers.md

* Update and rename add-windows-nodes.md to intro-windows-nodes.md

* Update user-guide-windows-containers.md

* Rename intro-windows-nodes.md to intro-windows-in-kubernetes.md

* Update user-guide-windows-nodes.md

* Update user-guide-windows-containers.md

* Update user-guide-windows-containers.md

* Update user-guide-windows-nodes.md

* Update user-guide-windows-containers.md

* Update _index.md

* Update intro-windows-in-kubernetes.md

* Update intro-windows-in-kubernetes.md

fixing the pause image

* Update intro-windows-in-kubernetes.md

changing tables from html to MD

* Update user-guide-windows-nodes.md

converting tables from HTML to MD

* Update intro-windows-in-kubernetes.md

* Update user-guide-windows-nodes.md

* Update user-guide-windows-nodes.md

* Update user-guide-windows-nodes.md

updating the numbering , even though it messes up the notes a little bit. Jim will file a ticket to follow up

* Update user-guide-windows-nodes.md

* update to windows docs for 1.14 (#13322)

* Update intro-windows-in-kubernetes.md

* Update intro-windows-in-kubernetes.md

* Update intro-windows-in-kubernetes.md

* Update intro-windows-in-kubernetes.md

* Update intro-windows-in-kubernetes.md

* Update user-guide-windows-containers.md

* Update user-guide-windows-nodes.md

* Update intro-windows-in-kubernetes.md (#13344)

* server side apply followup (#13321)

* change some parts of serverside apply docs in response to comments

* fix typos and wording

* Update config.toml (#13365)
2019-03-25 15:06:16 -07:00

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title, content_template, weight
title content_template weight
Configure Pod Initialization templates/task 130

{{% capture overview %}} This page shows how to use an Init Container to initialize a Pod before an application Container runs.

{{% /capture %}}

{{% capture prerequisites %}}

{{< include "task-tutorial-prereqs.md" >}} {{< version-check >}}

{{% /capture %}}

{{% capture steps %}}

Create a Pod that has an Init Container

In this exercise you create a Pod that has one application Container and one Init Container. The init container runs to completion before the application container starts.

Here is the configuration file for the Pod:

{{< codenew file="pods/init-containers.yaml" >}}

In the configuration file, you can see that the Pod has a Volume that the init container and the application container share.

The init container mounts the shared Volume at /work-dir, and the application container mounts the shared Volume at /usr/share/nginx/html. The init container runs the following command and then terminates:

wget -O /work-dir/index.html http://kubernetes.io

Notice that the init container writes the index.html file in the root directory of the nginx server.

Create the Pod:

kubectl apply -f https://k8s.io/examples/pods/init-containers.yaml

Verify that the nginx container is running:

kubectl get pod init-demo

The output shows that the nginx container is running:

NAME        READY     STATUS    RESTARTS   AGE
init-demo   1/1       Running   0          1m

Get a shell into the nginx container running in the init-demo Pod:

kubectl exec -it init-demo -- /bin/bash

In your shell, send a GET request to the nginx server:

root@nginx:~# apt-get update
root@nginx:~# apt-get install curl
root@nginx:~# curl localhost

The output shows that nginx is serving the web page that was written by the init container:

<!Doctype html>
<html id="home">

<head>
...
"url": "http://kubernetes.io/"}</script>
</head>
<body>
  ...
  <p>Kubernetes is open source giving you the freedom to take advantage ...</p>
  ...

{{% /capture %}}

{{% capture whatsnext %}}

{{% /capture %}}

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