Write page templates and canonical examples.
Conflicts: _data/tasks.yml _data/tutorials.yml docs/tasks/access-kubernetes-api/http-proxy-access-api.md docs/tasks/index.md docs/tutorials/index.md
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bigheader: "Concepts"
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toc:
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- title: Concepts
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path: /docs/concepts/
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- title: Object Metadata
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section:
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- title: Annotations
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path: /docs/concepts/object-metadata/annotations/
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@ -1,5 +1,8 @@
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tocs:
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- guides
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- tutorials
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- tasks
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- concepts
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- reference
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- samples
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- support
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- support
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@ -4,6 +4,11 @@ toc:
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- title: Support
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path: /docs/troubleshooting/
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- title: Contributing to the Kubernetes Docs
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section:
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- title: Using Page Templates
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path: /docs/contribute/page-templates/
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- title: Troubleshooting
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section:
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- title: Debugging Pods and Replication Controllers
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|
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@ -0,0 +1,13 @@
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bigheader: "Tasks"
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toc:
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- title: Tasks
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path: /docs/tasks/
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- title: Accessing Applications in a Cluster
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section:
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- title: Using Port Forwarding to Access Applications in a Cluster
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path: /docs/tasks/access-application-cluster/port-forward-access-application-cluster/
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- title: Accessing the Kubernetes API
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section:
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- title: Using an HTTP Proxy to Access the Kubernetes API
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path: /docs/tasks/access-kubernetes-api/http-proxy-access-api/
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bigheader: "Tutorials"
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toc:
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- title: Tutorials
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path: /docs/tutorials/
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- title: Stateless Applications
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section:
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- title: Running a Stateless Application Using a Deployment
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path: /docs/tutorials/stateless-application/run-stateless-application-deployment/
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- title: Exposing an External IP Address Using a Service
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path: /docs/tutorials/stateless-application/expose-external-ip-address-service/
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{% if overview %}
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{{ overview }}
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{% else %}
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{% include templates/_errorthrower.md missing_block='overview' purpose='provides an overview of this concept.' %}
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{% endif %}
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* TOC
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{:toc}
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{% if body %}
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{{ body }}
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{% else %}
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{% include templates/_errorthrower.md missing_block='body' purpose='supplies the body of the page content.' %}
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{% endif %}
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{% if whatsnext %}
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### What's next
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{{ whatsnext }}
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{% endif %}
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@ -1,36 +1,55 @@
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{% if purpose %}
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{% if overview %}
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### Purpose
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{{ purpose }}
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{{ overview }}
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{% else %}
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{% include templates/_errorthrower.md missing_block='purpose' heading='Purpose' purpose='states, in one sentence, what the purpose of this document is, so that the user will know what they are able to achieve if they follow the provided steps.' %}
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{% endif %}
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{% if recommended_background %}
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### Recommended background
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{{ recommended_background }}
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{% else %}
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{% include templates/_errorthrower.md missing_block='recommended_background' heading='Recommended background' purpose='lists assumptions of baseline knowledge that you expect the user to have before reading ahead.' %}
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{% include templates/_errorthrower.md missing_block='overview' purpose='states, in one or two sentences, the purpose of this document' %}
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{% endif %}
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{% if step_by_step %}
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* TOC
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{: toc}
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### Step by step
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{{ step_by_step }}
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{% if prerequisites %}
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### Before you begin
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{{ prerequisites }}
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{% else %}
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{% include templates/_errorthrower.md missing_block='step_by_step' heading='Step by step' purpose='lists a series of linear, numbered steps that accomplish the described task.' %}
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{% include templates/_errorthrower.md missing_block='prerequisites' heading='Before you begin' purpose='lists action prerequisites and knowledge prerequisites' %}
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{% endif %}
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{% endif %}
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{% if steps %}
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{{ steps }}
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{% else %}
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{% include templates/_errorthrower.md missing_block='steps' purpose='lists a sequence of numbered steps that accomplish the task.' %}
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{% endif %}
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{% if discussion %}
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{{ discussion }}
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{% else %}
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{% endif %}
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{% if whatsnext %}
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### What's next
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{{ whatsnext }}
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{% endif %}
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|
|
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{% if overview %}
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{{ overview }}
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{% else %}
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{% include templates/_errorthrower.md missing_block='overview' purpose='states, in one or two sentences, the purpose of this document' %}
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{% endif %}
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* TOC
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{: toc}
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{% if objectives %}
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### Objectives
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{{ objectives }}
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{% else %}
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{% include templates/_errorthrower.md missing_block='objectives' heading='Objectives' purpose='lists the objectives for this tutorial.' %}
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{% endif %}
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{% if prerequisites %}
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### Before you begin
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{{ prerequisites }}
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{% else %}
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{% include templates/_errorthrower.md missing_block='prerequisites' heading='Before you begin' purpose='lists action prerequisites and knowledge prerequisites' %}
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{% endif %}
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{% if lessoncontent %}
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{{ lessoncontent }}
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{% else %}
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{% include templates/_errorthrower.md missing_block='lessoncontent' purpose='provides the lesson content for this tutorial.' %}
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{% endif %}
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{% if cleanup %}
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### Cleaning up
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{{ cleanup }}
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{% endif %}
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{% if whatsnext %}
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### What's next
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{{ whatsnext }}
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{% endif %}
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@ -7,19 +7,22 @@
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<!-- HERO -->
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<section id="hero" class="light-text">
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<h1>{{ site.data[foundTOC].bigheader }}</h1>
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<h5>{{ site.data[foundTOC].abstract }}</h5>
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<div id="vendorStrip" class="light-text">
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<ul>
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<li><a href="/docs/" {% if site.data[foundTOC].bigheader == "Guides" %}class="YAH"{% endif %}>GUIDES</a></li>
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<li><a href="/docs/reference" {% if site.data[foundTOC].bigheader == "Reference Documentation" %}class="YAH"{% endif %}>REFERENCE</a></li>
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<li><a href="/docs/samples" {% if site.data[foundTOC].bigheader == "Samples" %}class="YAH"{% endif %}>SAMPLES</a></li>
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<li><a href="/docs/troubleshooting/" {% if site.data[foundTOC].bigheader == "Support" %}class="YAH"{% endif %}>SUPPORT</a></li>
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</ul>
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<div id="searchBox">
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<input type="text" id="search" placeholder="Search" onkeydown="if (event.keyCode==13) window.location.replace('/docs/search/?q=' + this.value)">
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</div>
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</div>
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<h1>{{ site.data[foundTOC].bigheader }}</h1>
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<h5>{{ site.data[foundTOC].abstract }}</h5>
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<div id="vendorStrip" class="light-text">
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<ul>
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<li><a href="/docs/" {% if site.data[foundTOC].bigheader == "Guides" %}class="YAH"{% endif %}>GUIDES</a></li>
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<li><a href="/docs/tutorials/" {% if site.data[foundTOC].bigheader == "Tutorials" %}class="YAH"{% endif %}>TUTORIALS</a></li>
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<li><a href="/docs/tasks/" {% if site.data[foundTOC].bigheader == "Tasks" %}class="YAH"{% endif %}>TASKS</a></li>
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<li><a href="/docs/concepts/" {% if site.data[foundTOC].bigheader == "Concepts" %}class="YAH"{% endif %}>CONCEPTS</a></li>
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<li><a href="/docs/reference" {% if site.data[foundTOC].bigheader == "Reference Documentation" %}class="YAH"{% endif %}>REFERENCE</a></li>
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<li><a href="/docs/samples" {% if site.data[foundTOC].bigheader == "Samples" %}class="YAH"{% endif %}>SAMPLES</a></li>
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<li><a href="/docs/troubleshooting/" {% if site.data[foundTOC].bigheader == "Support" %}class="YAH"{% endif %}>SUPPORT</a></li>
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</ul>
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<div id="searchBox">
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<input type="text" id="search" placeholder="Search" onkeydown="if (event.keyCode==13) window.location.replace('/docs/search/?q=' + this.value)">
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</div>
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</div>
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</section>
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<section id="encyclopedia">
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@ -34,7 +37,7 @@
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{% if notitle != "true" %}<h1>{{ title }}</h1>{% endif %}
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{{ content }}
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<p><a href=""><img src="https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/{{ page.path }}?pixel" alt="Analytics" /></a>
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{% if page.url != "/404.html" && page.url != "/docs/search/" %}<div id="pd_rating_holder_8345992"></div>
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{% if page.url != "/404.html" and page.url != "/docs/search/" %}<div id="pd_rating_holder_8345992"></div>
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<script type="text/javascript">
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PDRTJS_settings_8345992 = {
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"id" : "8345992",
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|
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@ -0,0 +1,14 @@
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---
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---
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The Concepts section of the Kubernetes documentation is a work in progress.
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#### Object Metadata
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[Annotations](/docs/concepts/object-metadata/annotations/)
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### What's next
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If you would like to write a concept page, see
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[Using Page Templates](/docs/contribute/page-templates/)
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for information about the concept page type and the concept template.
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---
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---
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{% capture overview %}
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You can use Kubernetes annotations to attach arbitrary non-identifying metadata
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to objects. Clients such as tools and libraries can retrieve this metadata.
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{% endcapture %}
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{% capture body %}
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### Attaching metadata to objects
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You can use either labels or annotations to attach metadata to Kubernetes
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objects. Labels can be used to select objects and to find
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collections of objects that satisfy certain conditions. In contrast, annotations
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are not used to identify and select objects. The metadata
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in an annotation can be small or large, structured or unstructured, and can
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include characters not permitted by labels.
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Annotations, like labels, are key/value maps:
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"annotations": {
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"key1" : "value1",
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"key2" : "value2"
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}
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Here are some examples of information that could be recorded in annotations:
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* Fields managed by a declarative configuration layer. Attaching these fields
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as annotations distinguishes them from default values set by clients or
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servers, and from auto-generated fields and fields set by
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auto-sizing or auto-scaling systems.
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* Build, release, or image information like timestamps, release IDs, git branch,
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PR numbers, image hashes, and registry address.
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* Pointers to logging, monitoring, analytics, or audit repositories.
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* Client library or tool information that can be used for debugging purposes:
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for example, name, version, and build information.
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* User or tool/system provenance information, such as URLs of related objects
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from other ecosystem components.
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* Lightweight rollout tool metadata: for example, config or checkpoints.
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* Phone or pager numbers of persons responsible, or directory entries that
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specify where that information can be found, such as a team web site.
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Instead of using annotations, you could store this type of in information in an
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external database or directory, but that would make it much harder to produce
|
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shared client libraries and tools for deployment, management, introspection,
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and the like.
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{% endcapture %}
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{% capture whatsnext %}
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Learn more about [Labels and Selectors](/docs/user-guide/labels/).
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{% endcapture %}
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{% include templates/concept.md %}
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@ -0,0 +1,205 @@
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---
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---
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|
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<!--<html>
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<body>-->
|
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|
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<p>These page templates are available for writers who would like to contribute new topics to the Kubernetes docs:</p>
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|
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<ul>
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<li><a href="#task_template">Task</a></li>
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<li><a href="#tutorial_template">Tutorial</a></li>
|
||||
<li><a href="#concept_template">Concept</a></li>
|
||||
</ul>
|
||||
|
||||
<p>The page templates are in the <a href="https://github.com/kubernetes/kubernetes.github.io/tree/master/_includes/templates">_includes/templates</a> directory of the <a href="https://github.com/kubernetes/kubernetes.github.io">kubernetes.github.io</a> repository.
|
||||
|
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<h3 id="task_template">Task template</h3>
|
||||
|
||||
<p>A task page shows how to do a single thing, typically by giving a short
|
||||
sequence of steps. Task pages have minimal explanation, but often provide links
|
||||
to conceptual topics that provide related background and knowledge.</p>
|
||||
|
||||
<p>To write a new task page, create a Markdown file in a subdirectory of the
|
||||
/docs/tasks directory. In your Markdown file, provide values for these
|
||||
variables, and then include templates/task.md:</p>
|
||||
|
||||
<ul>
|
||||
<li>overview - required</li>
|
||||
<li>prerequisites - required</li>
|
||||
<li>steps - required</li>
|
||||
<li>discussion - optional</li>
|
||||
<li>whatsnext - optional</li>
|
||||
</ul>
|
||||
|
||||
<p>Here's an example of a Markdown file that uses the task template:</p>
|
||||
|
||||
{% raw %}
|
||||
<pre>---
|
||||
---
|
||||
|
||||
{% capture overview %}
|
||||
This page shows how to ...
|
||||
{% endcapture %}
|
||||
|
||||
{% capture prerequisites %}
|
||||
* Do this.
|
||||
* Do this too.
|
||||
{% endcapture %}
|
||||
|
||||
{% capture steps %}
|
||||
### Doing ...
|
||||
|
||||
1. Do this.
|
||||
1. Do this next. Possibly read this [related explanation](...).
|
||||
{% endcapture %}
|
||||
|
||||
{% capture discussion %}
|
||||
### Understanding ...
|
||||
|
||||
Here's an interesting thing to know about the steps you just did.
|
||||
{% endcapture %}
|
||||
|
||||
{% capture whatsnext %}
|
||||
* Learn more about [this](...).
|
||||
* See this [related task](...).
|
||||
{% endcapture %}
|
||||
|
||||
{% include templates/task.md %}
|
||||
</pre>
|
||||
{% endraw %}
|
||||
|
||||
<p>Here's an example of a published topic that uses the task template:</p>
|
||||
|
||||
<p><a href="/docs/tasks/access-application-cluster/http-proxy-access-application-cluster">Using an HTTP Proxy to Access Applications in a Cluster</a></p>
|
||||
|
||||
<h3 id="tutorial_template">Tutorial template</h3>
|
||||
|
||||
<p>A tutorial page shows how to accomplish a goal that is larger than a single
|
||||
task. Typically a tutorial page has several sections, each of which has a
|
||||
sequence of steps. For example, a tutorial might provide a walkthrough of a
|
||||
code sample that illustrates a certain feature of Kubernetes. Tutorials can
|
||||
include surface-level explanations, but should link to related concept topics
|
||||
for deep explanations.
|
||||
|
||||
<p>To write a new tutorial page, create a Markdown file in a subdirectory of the
|
||||
/docs/tutorials directory. In your Markdown file, provide values for these
|
||||
variables, and then include templates/tutorial.md:</p>
|
||||
|
||||
<ul>
|
||||
<li>overview - required</li>
|
||||
<li>prerequisites - required</li>
|
||||
<li>objectives - required</li>
|
||||
<li>lessoncontent - required</li>
|
||||
<li>cleanup - optional</li>
|
||||
<li>whatsnext - optional</li>
|
||||
</ul>
|
||||
|
||||
<p>Here's an example of a Markdown file that uses the tutorial template:</p>
|
||||
|
||||
{% raw %}
|
||||
<pre>---
|
||||
---
|
||||
|
||||
{% capture overview %}
|
||||
This page shows how to ...
|
||||
{% endcapture %}
|
||||
|
||||
{% capture prerequisites %}
|
||||
* Do this.
|
||||
* Do this too.
|
||||
{% endcapture %}
|
||||
|
||||
{% capture objectives %}
|
||||
* Learn this.
|
||||
* Build this.
|
||||
* Run this.
|
||||
{% endcapture %}
|
||||
|
||||
{% capture lessoncontent %}
|
||||
### Building ...
|
||||
|
||||
1. Do this.
|
||||
1. Do this next. Possibly read this [related explanation](...).
|
||||
|
||||
### Running ...
|
||||
|
||||
1. Do this.
|
||||
1. Do this next.
|
||||
|
||||
### Understanding the code
|
||||
Here's something interesting about the code you ran in the preceding steps.
|
||||
{% endcapture %}
|
||||
|
||||
{% capture cleanup %}
|
||||
* Delete this.
|
||||
* Stop this.
|
||||
{% endcapture %}
|
||||
|
||||
{% capture whatsnext %}
|
||||
* Learn more about [this](...).
|
||||
* See this [related tutorial](...).
|
||||
{% endcapture %}
|
||||
|
||||
{% include templates/tutorial.md %}
|
||||
</pre>
|
||||
{% endraw %}
|
||||
|
||||
<p>Here's an example of a published topic that uses the tutorial template:</p>
|
||||
|
||||
<p><a href="/docs/tutorials/stateless-application/run-stateless-application-deployment/">Running a Stateless Application Using a Deployment</a></p>
|
||||
|
||||
<h3 id="concept_template">Concept template</h3>
|
||||
|
||||
<p>A concept page explains some aspect of Kubernetes. For example, a concept
|
||||
page might describe the Kubernetes Deployment object and explain the role it
|
||||
plays as an application is deployed, scaled, and updated. Typically, concept
|
||||
pages don't include sequences of steps, but instead provide links to tasks or
|
||||
tutorials.
|
||||
|
||||
<p>To write a new concept page, create a Markdown file in a subdirectory of the
|
||||
/docs/concepts directory. In your Markdown file, provide values for these
|
||||
variables, and then include templates/concept.md:</p>
|
||||
|
||||
<ul>
|
||||
<li>overview - required</li>
|
||||
<li>body - required</li>
|
||||
<li>whatsnext - optional</li>
|
||||
</ul>
|
||||
|
||||
<p>Here's an example of a page that uses the concept template:</p>
|
||||
|
||||
{% raw %}
|
||||
<pre>---
|
||||
---
|
||||
|
||||
{% capture overview %}
|
||||
This page explains ...
|
||||
{% endcapture %}
|
||||
|
||||
{% capture body %}
|
||||
### Understanding ...
|
||||
|
||||
Kubernetes provides ...
|
||||
|
||||
### Using ...
|
||||
|
||||
To use ...
|
||||
{% endcapture %}
|
||||
|
||||
{% capture whatsnext %}
|
||||
* Learn more about [this](...).
|
||||
* See this [related task](...).
|
||||
{% endcapture %}
|
||||
|
||||
{% include templates/concept.md %}
|
||||
</pre>
|
||||
{% endraw %}
|
||||
|
||||
<p>Here's an example of a published topic that uses the concept template:</p>
|
||||
|
||||
<p><a href="/docs/concepts/object-metadata/annotations">Annotations</a></p>
|
||||
|
||||
<!--</body>
|
||||
</html>-->
|
||||
|
||||
|
|
@ -0,0 +1,133 @@
|
|||
---
|
||||
---
|
||||
|
||||
{% capture overview %}
|
||||
|
||||
This page shows how to create a Kubernetes Service object to that provides
|
||||
load-balanced access to an application running in a cluster.
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture prerequisites %}
|
||||
|
||||
* Install [kubectl](http://kubernetes.io/docs/user-guide/prereqs).
|
||||
|
||||
* Create a Kubernetes cluster, including a running Kubernetes
|
||||
API server. One way to create a new cluster is to use
|
||||
[Minikube](/docs/getting-started-guides/minikube).
|
||||
|
||||
* Configure `kubectl` to communicate with your Kubernetes API server. This
|
||||
configuration is done automatically if you use Minikube.
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture objectives %}
|
||||
|
||||
* Run two instances of a Hello World application
|
||||
* Create a Service object
|
||||
* Use the Service object to access the running application
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture lessoncontent %}
|
||||
|
||||
### Creating a Service for an application running in two pods
|
||||
|
||||
1. Run a Hello World application in your cluster:
|
||||
|
||||
kubectl run hello-world --replicas=2 --labels="run=load-balancer-example" --image=gcr.io/google-samples/node-hello:1.0 --port=8080
|
||||
|
||||
1. List the pods that are running the Hello World application:
|
||||
|
||||
kubectl get pods --selector="run=load-balancer-example"
|
||||
|
||||
The output is similar to this:
|
||||
|
||||
NAME READY STATUS RESTARTS AGE
|
||||
hello-world-2189936611-8fyp0 1/1 Running 0 6m
|
||||
hello-world-2189936611-9isq8 1/1 Running 0 6m
|
||||
|
||||
1. List the replica set for the two Hello World pods:
|
||||
|
||||
kubectl get replicasets --selector="run=load-balancer-example"
|
||||
|
||||
The output is similar to this:
|
||||
|
||||
NAME DESIRED CURRENT AGE
|
||||
hello-world-2189936611 2 2 12m
|
||||
|
||||
1. Create a Serivice object that exposes the replica set:
|
||||
|
||||
kubectl expose rs <your-replica-set-name> --type="LoadBalancer" --name="example-service"
|
||||
|
||||
where `<your-replica-set-name>` is the name of your replica set.
|
||||
|
||||
1. Display the IP addresses for your service:
|
||||
|
||||
kubectl get services example-service
|
||||
|
||||
The output shows the internal IP address and the external IP address of
|
||||
your service. If the external IP address shows as `<pending>`, repeat the
|
||||
command.
|
||||
|
||||
Note: If you are using Minikube, you don't get an external IP address. The
|
||||
external IP address remains in the pending state.
|
||||
|
||||
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
|
||||
example-service 10.0.0.160 <pending> 8080/TCP 40s
|
||||
|
||||
1. Use your Service object to access the Hello World application:
|
||||
|
||||
curl <your-external-ip-address>:8080
|
||||
|
||||
where `<your-external-ip-address>` is the external IP address of your
|
||||
service.
|
||||
|
||||
The output is a hello message from the application:
|
||||
|
||||
Hello Kubernetes!
|
||||
|
||||
Note: If you are using Minikube, enter these commands:
|
||||
|
||||
kubectl cluster-info
|
||||
kubectl describe services example-service
|
||||
|
||||
The output displays the IP address of your Minikube node and the NodePort
|
||||
value for your service. Then enter this command to access the Hello World
|
||||
application:
|
||||
|
||||
curl <minikube-node-ip-address>:<service-node-port>
|
||||
|
||||
where `<minikube-node-ip-address>` us the IP address of your Minikube node,
|
||||
and `<service-node-port>` is the NodePort value for your service.
|
||||
|
||||
### Using a service configuration file
|
||||
|
||||
As an alternative to using `kubectl expose`, you can use a
|
||||
[service configuration file](/docs/user-guide/services/operations)
|
||||
to create a Service.
|
||||
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture cleanup %}
|
||||
|
||||
If you want to stop the Hello World application, enter these commands:
|
||||
|
||||
TODO
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture whatsnext %}
|
||||
|
||||
Learn more about
|
||||
[connecting applications with services](/docs/user-guide/connecting-applications/).
|
||||
{% endcapture %}
|
||||
|
||||
{% include templates/tutorial.md %}
|
||||
|
||||
|
|
@ -0,0 +1,101 @@
|
|||
---
|
||||
---
|
||||
|
||||
{% capture overview %}
|
||||
|
||||
This page shows how to use `kubectl port-forward` to connect to a Redis
|
||||
server running in a Kubernetes cluster. This type of connection can be useful
|
||||
for database debugging.
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture prerequisites %}
|
||||
|
||||
* Install [kubectl](http://kubernetes.io/docs/user-guide/prereqs).
|
||||
|
||||
* Create a Kubernetes cluster, including a running Kubernetes
|
||||
API server. One way to create a new cluster is to use
|
||||
[Minikube](/docs/getting-started-guides/minikube).
|
||||
|
||||
* Configure `kubectl` to communicate with your Kubernetes API server. This
|
||||
configuration is done automatically if you use Minikube.
|
||||
|
||||
* Install [redis-cli](http://redis.io/topics/rediscli).
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture steps %}
|
||||
|
||||
### Creating a pod to run a Redis server
|
||||
|
||||
1. Create a pod:
|
||||
|
||||
export REPO=https://raw.githubusercontent.com/kubernetes/kubernetes.github.io/master
|
||||
kubectl create -f $REPO/docs/tasks/access-application-cluster/redis-master.yaml
|
||||
|
||||
The output of a successful command verifies that the pod was created:
|
||||
|
||||
pod "redis-master" created
|
||||
|
||||
1. Check to see whether the pod is running and ready:
|
||||
|
||||
kubectl get pods
|
||||
|
||||
When the pod is ready, the output displays a STATUS of Running:
|
||||
|
||||
NAME READY STATUS RESTARTS AGE
|
||||
redis-master 2/2 Running 0 41s
|
||||
|
||||
1. Verify that the Redis server is running in the pod and listening on port 6379:
|
||||
|
||||
{% raw %}
|
||||
kubectl get pods redis-master --template='{{(index (index .spec.containers 0).ports 0).containerPort}}{{"\n"}}'
|
||||
{% endraw %}
|
||||
|
||||
The output displays the port:
|
||||
|
||||
6379
|
||||
|
||||
### Forward a local port to a port on the pod
|
||||
|
||||
1. Forward port 6379 on the local workstation to port 6379 of redis-master pod:
|
||||
|
||||
kubectl port-forward redis-master 6379:6379
|
||||
|
||||
The output is similar to this:
|
||||
|
||||
I0710 14:43:38.274550 3655 portforward.go:225] Forwarding from 127.0.0.1:6379 -> 6379
|
||||
I0710 14:43:38.274797 3655 portforward.go:225] Forwarding from [::1]:6379 -> 6379
|
||||
|
||||
1. Start the Redis command line interface:
|
||||
|
||||
redis-cli
|
||||
|
||||
1. At the Redis command line prompt, enter the `ping` command:
|
||||
|
||||
127.0.0.1:6379>ping
|
||||
|
||||
A successful ping request returns PONG.
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture discussion %}
|
||||
|
||||
### Discussion
|
||||
|
||||
Connections made to local port 6379 are forwarded to port 6379 of the pod that
|
||||
is running the Redis server. With this connection in place you can use your
|
||||
local workstation to debug the database that is running in the pod.
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture whatsnext %}
|
||||
Learn more about [kubectl port-forward](/docs/user-guide/kubectl/kubectl_port-forward/).
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% include templates/task.md %}
|
||||
|
|
@ -0,0 +1,33 @@
|
|||
apiVersion: v1
|
||||
kind: Pod
|
||||
metadata:
|
||||
labels:
|
||||
name: redis
|
||||
redis-sentinel: "true"
|
||||
role: master
|
||||
name: redis-master
|
||||
spec:
|
||||
containers:
|
||||
- name: master
|
||||
image: gcr.io/google_containers/redis:v1
|
||||
env:
|
||||
- name: MASTER
|
||||
value: "true"
|
||||
ports:
|
||||
- containerPort: 6379
|
||||
resources:
|
||||
limits:
|
||||
cpu: "0.1"
|
||||
volumeMounts:
|
||||
- mountPath: /redis-master-data
|
||||
name: data
|
||||
- name: sentinel
|
||||
image: kubernetes/redis:v1
|
||||
env:
|
||||
- name: SENTINEL
|
||||
value: "true"
|
||||
ports:
|
||||
- containerPort: 26379
|
||||
volumes:
|
||||
- name: data
|
||||
emptyDir: {}
|
||||
|
|
@ -0,0 +1,90 @@
|
|||
---
|
||||
---
|
||||
|
||||
{% capture overview %}
|
||||
This page shows how to use an HTTP proxy to access the Kubernetes API.
|
||||
{% endcapture %}
|
||||
|
||||
{% capture prerequisites %}
|
||||
|
||||
* Install [kubectl](http://kubernetes.io/docs/user-guide/prereqs).
|
||||
|
||||
* Create a Kubernetes cluster, including a running Kubernetes
|
||||
API server. One way to create a new cluster is to use
|
||||
[Minikube](/docs/getting-started-guides/minikube).
|
||||
|
||||
* Configure `kubectl` to communicate with your Kubernetes API server. This
|
||||
configuration is done automatically if you use Minikube.
|
||||
|
||||
* If you do not already have an application running in your cluster, start
|
||||
a Hello world application by entering this command:
|
||||
|
||||
kubectl run --image=gcr.io/google-samples/node-hello:1.0 --port=8080
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
{% capture steps %}
|
||||
|
||||
### Using kubectl to start a proxy server
|
||||
|
||||
This command starts a proxy to the Kubernetes API server:
|
||||
|
||||
kubectl proxy --port=8080
|
||||
|
||||
### Exploring the Kubernetes API
|
||||
|
||||
When the proxy server is running, you can explore the API using `curl`, `wget`,
|
||||
or a browser.
|
||||
|
||||
Get the API versions:
|
||||
|
||||
curl http://localhost:8080/api/
|
||||
|
||||
{
|
||||
"kind": "APIVersions",
|
||||
"versions": [
|
||||
"v1"
|
||||
],
|
||||
"serverAddressByClientCIDRs": [
|
||||
{
|
||||
"clientCIDR": "0.0.0.0/0",
|
||||
"serverAddress": "10.0.2.15:8443"
|
||||
}
|
||||
]
|
||||
}
|
||||
|
||||
Get a list of pods:
|
||||
|
||||
curl http://localhost:8080/api/v1/namespaces/default/pods
|
||||
|
||||
{
|
||||
"kind": "PodList",
|
||||
"apiVersion": "v1",
|
||||
"metadata": {
|
||||
"selfLink": "/api/v1/namespaces/default/pods",
|
||||
"resourceVersion": "33074"
|
||||
},
|
||||
"items": [
|
||||
{
|
||||
"metadata": {
|
||||
"name": "kubernetes-bootcamp-2321272333-ix8pt",
|
||||
"generateName": "kubernetes-bootcamp-2321272333-",
|
||||
"namespace": "default",
|
||||
"selfLink": "/api/v1/namespaces/default/pods/kubernetes-bootcamp-2321272333-ix8pt",
|
||||
"uid": "ba21457c-6b1d-11e6-85f7-1ef9f1dab92b",
|
||||
"resourceVersion": "33003",
|
||||
"creationTimestamp": "2016-08-25T23:43:30Z",
|
||||
"labels": {
|
||||
"pod-template-hash": "2321272333",
|
||||
"run": "kubernetes-bootcamp"
|
||||
},
|
||||
...
|
||||
}
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
{% capture whatsnext %}
|
||||
Learn more about [kubectl proxy](/docs/user-guide/kubectl/kubectl_proxy).
|
||||
{% endcapture %}
|
||||
|
||||
{% include templates/task.md %}
|
||||
|
|
@ -0,0 +1,90 @@
|
|||
---
|
||||
---
|
||||
|
||||
{% capture overview %}
|
||||
This page shows how to use an HTTP proxy to access the Kubernetes API.
|
||||
{% endcapture %}
|
||||
|
||||
{% capture prerequisites %}
|
||||
|
||||
* Install [kubectl](http://kubernetes.io/docs/user-guide/prereqs).
|
||||
|
||||
* Create a Kubernetes cluster, including a running Kubernetes
|
||||
API server. One way to create a new cluster is to use
|
||||
[Minikube](/docs/getting-started-guides/minikube).
|
||||
|
||||
* Configure `kubectl` to communicate with your Kubernetes API server. This
|
||||
configuration is done automatically if you use Minikube.
|
||||
|
||||
* If you do not already have an application running in your cluster, start
|
||||
a Hello world application by entering this command:
|
||||
|
||||
kubectl run --image=gcr.io/google-samples/node-hello:1.0 --port=8080
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
{% capture steps %}
|
||||
|
||||
### Using kubectl to start a proxy server
|
||||
|
||||
This command starts a proxy to the Kubernetes API server:
|
||||
|
||||
kubectl proxy --port=8080
|
||||
|
||||
### Exploring the Kubernetes API
|
||||
|
||||
When the proxy server is running, you can explore the API using `curl`, `wget`,
|
||||
or a browser.
|
||||
|
||||
Get the API versions:
|
||||
|
||||
curl http://localhost:8080/api/
|
||||
|
||||
{
|
||||
"kind": "APIVersions",
|
||||
"versions": [
|
||||
"v1"
|
||||
],
|
||||
"serverAddressByClientCIDRs": [
|
||||
{
|
||||
"clientCIDR": "0.0.0.0/0",
|
||||
"serverAddress": "10.0.2.15:8443"
|
||||
}
|
||||
]
|
||||
}
|
||||
|
||||
Get a list of pods:
|
||||
|
||||
curl http://localhost:8080/api/v1/namespaces/default/pods
|
||||
|
||||
{
|
||||
"kind": "PodList",
|
||||
"apiVersion": "v1",
|
||||
"metadata": {
|
||||
"selfLink": "/api/v1/namespaces/default/pods",
|
||||
"resourceVersion": "33074"
|
||||
},
|
||||
"items": [
|
||||
{
|
||||
"metadata": {
|
||||
"name": "kubernetes-bootcamp-2321272333-ix8pt",
|
||||
"generateName": "kubernetes-bootcamp-2321272333-",
|
||||
"namespace": "default",
|
||||
"selfLink": "/api/v1/namespaces/default/pods/kubernetes-bootcamp-2321272333-ix8pt",
|
||||
"uid": "ba21457c-6b1d-11e6-85f7-1ef9f1dab92b",
|
||||
"resourceVersion": "33003",
|
||||
"creationTimestamp": "2016-08-25T23:43:30Z",
|
||||
"labels": {
|
||||
"pod-template-hash": "2321272333",
|
||||
"run": "kubernetes-bootcamp"
|
||||
},
|
||||
...
|
||||
}
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
{% capture whatsnext %}
|
||||
Learn more about [kubectl proxy](/docs/user-guide/kubectl/kubectl_proxy).
|
||||
{% endcapture %}
|
||||
|
||||
{% include templates/task.md %}
|
||||
|
|
@ -0,0 +1,19 @@
|
|||
---
|
||||
---
|
||||
|
||||
The Tasks section of the Kubernetes documentation is a work in progress
|
||||
|
||||
#### Accessing Applications in a Cluster
|
||||
|
||||
* [Using Port Forwarding to Access Applications in a Cluster](/docs/tasks/access-application-cluster/port-forward-access-application-cluster/)
|
||||
|
||||
#### Accessing the Kubernetes API
|
||||
|
||||
* [Using an HTTP Proxy to Access the Kubernetes API](/docs/tasks/access-kubernetes-api/http-proxy-access-api)
|
||||
|
||||
|
||||
### What's next
|
||||
|
||||
If you would like to write a task page, see
|
||||
[Using Page Templates](/docs/contribute/page-templates/)
|
||||
for information about the task page type and the task template.
|
||||
|
|
@ -0,0 +1,16 @@
|
|||
---
|
||||
---
|
||||
|
||||
The Tutorials section of the Kubernetes documentation is a work in progress.
|
||||
|
||||
#### Stateless Applications
|
||||
|
||||
* [Running a Stateless Application Using a Deployment](/docs/tutorials/stateless-application/run-stateless-application-deployment/)
|
||||
|
||||
* [Exposing an External IP Address Using a Service](/docs/tutorials/stateless-application/expose-external-ip-address-service/)
|
||||
|
||||
### What's next
|
||||
|
||||
If you would like to write a tutorial, see
|
||||
[Using Page Templates](/docs/contribute/page-templates/)
|
||||
for information about the tutorial page type and the tutorial template.
|
||||
|
|
@ -0,0 +1,16 @@
|
|||
apiVersion: extensions/v1beta1
|
||||
kind: Deployment
|
||||
metadata:
|
||||
name: nginx-deployment
|
||||
spec:
|
||||
replicas: 2
|
||||
template:
|
||||
metadata:
|
||||
labels:
|
||||
app: nginx
|
||||
spec:
|
||||
containers:
|
||||
- name: nginx
|
||||
image: nginx:1.8 # Update the version of nginx from 1.7.9 to 1.8
|
||||
ports:
|
||||
- containerPort: 80
|
||||
|
|
@ -0,0 +1,19 @@
|
|||
apiVersion: extensions/v1beta1
|
||||
kind: Deployment
|
||||
metadata:
|
||||
name: nginx-deployment
|
||||
spec:
|
||||
replicas: 2 # tells deployment to run 2 pods matching the template
|
||||
template: # create pods using pod definition in this template
|
||||
metadata:
|
||||
# unlike pod-nginx.yaml, the name is not included in the meta data as a unique name is
|
||||
# generated from the deployment name
|
||||
labels:
|
||||
app: nginx
|
||||
spec:
|
||||
containers:
|
||||
- name: nginx
|
||||
image: nginx:1.7.9
|
||||
ports:
|
||||
- containerPort: 80
|
||||
Contact GitHub API Training Shop Blog About
|
||||
|
|
@ -0,0 +1,146 @@
|
|||
---
|
||||
---
|
||||
|
||||
{% capture overview %}
|
||||
|
||||
This page shows how to create a Kubernetes Service object that external
|
||||
clients can use to access an application running in a cluster. The
|
||||
Service exposes a stable IP address and provides load balancing for
|
||||
an application that has two running instances.
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture prerequisites %}
|
||||
|
||||
* Install [kubectl](http://kubernetes.io/docs/user-guide/prereqs).
|
||||
|
||||
* Create a Kubernetes cluster, including a running Kubernetes
|
||||
API server. One way to create a new cluster is to use
|
||||
[Minikube](/docs/getting-started-guides/minikube).
|
||||
|
||||
* Configure `kubectl` to communicate with your Kubernetes API server. This
|
||||
configuration is done automatically if you use Minikube.
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture objectives %}
|
||||
|
||||
* Run two instances of a Hello World application.
|
||||
* Create a Service object that exposes an external IP address.
|
||||
* Use the Service object to access the running application.
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture lessoncontent %}
|
||||
|
||||
### Creating a service for an application running in two pods
|
||||
|
||||
1. Run a Hello World application in your cluster:
|
||||
|
||||
kubectl run hello-world --replicas=2 --labels="run=load-balancer-example" --image=gcr.io/google-samples/node-hello:1.0 --port=8080
|
||||
|
||||
The preceding command creates a
|
||||
[Deployment](/docs/user-guide/deployments/)
|
||||
object and an associated
|
||||
[ReplicaSet](/docs/user-guide/replicasets/)
|
||||
object. The ReplicaSet has two
|
||||
[Pods](/docs/user-guide/pods/),
|
||||
each of which runs the Hello World application.
|
||||
|
||||
1. Display information about the Deployment:
|
||||
|
||||
kubectl get deployments hello-world
|
||||
kubectl describe deployments hello-world
|
||||
|
||||
1. Display information about the ReplicaSet:
|
||||
|
||||
kubectl get replicasets hello-world
|
||||
kubectl describe replicasets hello-world
|
||||
|
||||
1. List the pods that are running the Hello World application:
|
||||
|
||||
kubectl get pods --selector="run=load-balancer-example"
|
||||
|
||||
The output is similar to this:
|
||||
|
||||
NAME READY STATUS RESTARTS AGE
|
||||
hello-world-2189936611-8fyp0 1/1 Running 0 6m
|
||||
hello-world-2189936611-9isq8 1/1 Running 0 6m
|
||||
|
||||
1. Create a Service object that exposes the deployment:
|
||||
|
||||
kubectl expose deployment hello-world --type="LoadBalancer" --name="example-service"
|
||||
|
||||
1. Display the IP addresses for your service:
|
||||
|
||||
kubectl get services example-service
|
||||
|
||||
The output shows the internal IP address and the external IP address of
|
||||
your service. If the external IP address shows as `<pending>`, repeat the
|
||||
command.
|
||||
|
||||
Note: If you are using Minikube, you don't get an external IP address. The
|
||||
external IP address remains in the pending state.
|
||||
|
||||
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
|
||||
example-service 10.0.0.160 <pending> 8080/TCP 40s
|
||||
|
||||
1. Use your service to access the Hello World application:
|
||||
|
||||
curl <your-external-ip-address>:8080
|
||||
|
||||
where `<your-external-ip-address>` is the external IP address of your
|
||||
service.
|
||||
|
||||
The output is a hello message from the application:
|
||||
|
||||
Hello Kubernetes!
|
||||
|
||||
Note: If you are using Minikube, enter these commands:
|
||||
|
||||
kubectl cluster-info
|
||||
kubectl describe services example-service
|
||||
|
||||
The output displays the IP address of your Minikube node and the NodePort
|
||||
value for your service. Enter this command to access the Hello World
|
||||
application:
|
||||
|
||||
curl <minikube-node-ip-address>:<service-node-port>
|
||||
|
||||
where `<minikube-node-ip-address>` us the IP address of your Minikube node,
|
||||
and `<service-node-port>` is the NodePort value for your service.
|
||||
|
||||
### Using a service configuration file
|
||||
|
||||
As an alternative to using `kubectl expose`, you can use a
|
||||
[service configuration file](/docs/user-guide/services/operations)
|
||||
to create a Service.
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture cleanup %}
|
||||
|
||||
To delete the Service, enter this command:
|
||||
|
||||
kubectl delete services example-service
|
||||
|
||||
To delete the Deployment, the ReplicaSet, and the Pods that are running
|
||||
the Hello World application, enter this command:
|
||||
|
||||
kubectl delete deployment hello-world
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture whatsnext %}
|
||||
|
||||
Learn more about
|
||||
[connecting applications with services](/docs/user-guide/connecting-applications/).
|
||||
{% endcapture %}
|
||||
|
||||
{% include templates/tutorial.md %}
|
||||
|
||||
|
|
@ -0,0 +1,114 @@
|
|||
---
|
||||
---
|
||||
|
||||
{% capture overview %}
|
||||
|
||||
This page shows how to run an application using a Kubernetes Deployment object.
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture objectives %}
|
||||
|
||||
* Create an nginx deployment.
|
||||
* Use kubectl to list information about the deployment.
|
||||
* Update the deployment.
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture prerequisites %}
|
||||
|
||||
* To do this tutorial, you need a Kubernetes cluster, including a running
|
||||
Kubernetes API server. You can use an existing cluster, or you can create a
|
||||
new cluster. One way to create a new cluster is to use
|
||||
[Minikube](/docs/getting-started-guides/minikube).
|
||||
|
||||
* You also need to have `kubectl` installed on your local machine, and `kubectl`
|
||||
must be configured to communicate with your Kubernetes API server. This
|
||||
configuration is done automatically if you use Minikube.
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture lessoncontent %}
|
||||
|
||||
### Creating and exploring an nginx deployment
|
||||
|
||||
You can run an application by creating a Kubernetes Deployment object, and you
|
||||
can describe a Deployment in a YAML file. For example, this YAML file describes
|
||||
a Deployment that runs the nginx:1.7.9 Docker image:
|
||||
|
||||
{% include code.html language="yaml" file="deployment.yaml" ghlink="/docs/tutorials/stateless-application/deployment.yaml" %}
|
||||
|
||||
|
||||
1. Create a Deployment based on the YAML file:
|
||||
|
||||
export REPO=https://raw.githubusercontent.com/kubernetes/kubernetes.github.io/master
|
||||
kubectl create -f $REPO/docs/tutorials/stateless-application/deployment.yaml
|
||||
|
||||
1. Display information about the Deployment:
|
||||
|
||||
kubectl describe deployment nginx-deployment
|
||||
|
||||
user@computer:~/kubernetes.github.io$ kubectl describe deployment nginx-deployment
|
||||
Name: nginx-deployment
|
||||
Namespace: default
|
||||
CreationTimestamp: Tue, 30 Aug 2016 18:11:37 -0700
|
||||
Labels: app=nginx
|
||||
Selector: app=nginx
|
||||
Replicas: 2 updated | 2 total | 2 available | 0 unavailable
|
||||
StrategyType: RollingUpdate
|
||||
MinReadySeconds: 0
|
||||
RollingUpdateStrategy: 1 max unavailable, 1 max surge
|
||||
OldReplicaSets: <none>
|
||||
NewReplicaSet: nginx-deployment-1771418926 (2/2 replicas created)
|
||||
No events.
|
||||
|
||||
1. List the pods created by the deployment:
|
||||
|
||||
kubectl get pods -l app=nginx
|
||||
|
||||
NAME READY STATUS RESTARTS AGE
|
||||
nginx-deployment-1771418926-7o5ns 1/1 Running 0 16h
|
||||
nginx-deployment-1771418926-r18az 1/1 Running 0 16h
|
||||
|
||||
1. Display information about a pod:
|
||||
|
||||
kubectl display pod <pod-name>
|
||||
|
||||
where `<pod-name>` is the name of one of your pods.
|
||||
|
||||
### Updating the deployment
|
||||
|
||||
You can update the deployment by applying a new YAML file. This YAML file
|
||||
specifies that the deployment should be updated to use nginx 1.8.
|
||||
|
||||
{% include code.html language="yaml" file="deployment-update.yaml" ghlink="/docs/tutorials/stateless-application/deployment-update.yaml" %}
|
||||
|
||||
1. Apply the new YAML file:
|
||||
|
||||
kubectl apply -f $REPO/docs/tutorials/stateless-application/deployment-update.yaml
|
||||
|
||||
1. Watch the deployment create pods with new names and delete the old pods:
|
||||
|
||||
kubectl get pods -l app=nginx
|
||||
|
||||
### Deleting a deployment
|
||||
|
||||
Delete the deployment by name:
|
||||
|
||||
kubectl delete deployment nginx-deployment
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
|
||||
{% capture whatsnext %}
|
||||
|
||||
* Learn more about [Deployment objects](/docs/user-guide/deployments/).
|
||||
|
||||
* Learn more about [Deploying applications](/docs/user-guide/deploying-applications/)
|
||||
|
||||
{% endcapture %}
|
||||
|
||||
{% include templates/tutorial.md %}
|
||||
Loading…
Reference in New Issue