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| <a class="nav-link" href="../../installation-guide/advanced-configuration-options-for-the-che-server-component/">Advanced configuration options for Che server</a> |
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| <a class="nav-link" href="../../installation-guide/running-more-than-one-workspace-at-a-time/">Running more than one workspace at a time</a> |
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| <a class="nav-link" href="../../installation-guide/configuring-workspace-exposure-strategies/">Configuring workspace exposure strategies</a> |
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| <a class="nav-link" href="../../installation-guide/configuring-workspaces-nodeselector/">Configuring workspaces nodeSelector</a> |
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| <a class="nav-link" href="../../installation-guide/configuring-che-hostname/">Configuring Che hostname</a> |
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| <a class="nav-link" href="../../installation-guide/configuring-labels-for-ingresses/">Configuring labels for Kubernetes Ingress</a> |
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| <a class="nav-link" href="../../installation-guide/configuring-labels-for-routes/">Configuring labels for OpenShift Route</a> |
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| <a class="nav-link" href="../../installation-guide/deploying-che-with-support-for-git-repositories-with-self-signed-certificates/">Deploying Che with support for Git repositories with self-signed certificates</a> |
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| <a class="nav-link" href="../../installation-guide/installing-che-using-storage-classes/">Installing Che using storage classes</a> |
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| <a class="nav-link" href="../../installation-guide/importing-untrusted-tls-certificates/">Importing untrusted TLS certificates to Che</a> |
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| <a class="nav-link" href="../../installation-guide/switching-between-external-and-internal-communication/">Switching between external and internal ways in inter-component communication</a> |
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| <a class="nav-link" href="../../installation-guide/setting-up-the-keycloak-che-username-readonly-theme-for-the-eclipse-che-login-page/">Setting up the Keycloak che-username-readonly theme for the Eclipse Che login page</a> |
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| <a class="nav-link" href="../../installation-guide/mounting-a-secret-as-a-file-or-an-environment-variable-into-a-container/">Mounting a secret as a file or an environment variable into a Eclipse Che container</a> |
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| <a class="nav-link" href="../../installation-guide/upgrading-che/">Upgrading Che</a> |
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| <a class="nav-link" href="../../installation-guide/upgrading-che-using-operatorhub/">Upgrading Che using OperatorHub</a> |
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| <a class="nav-link" href="../../installation-guide/upgrading-che-using-the-cli-management-tool/">Upgrading Che using the CLI management tool</a> |
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| <a class="nav-link" href="../../installation-guide/upgrading-che-using-the-cli-management-tool-in-restricted-environment/">Upgrading Che in restricted environment</a> |
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| <a class="nav-link" href="../../installation-guide/uninstalling-che/">Uninstalling Che</a> |
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| <a class="nav-link" href="../../installation-guide/uninstalling-che-after-operatorhub-installation-using-openshift-web-console/">Using the OpenShift web console</a> |
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| <a class="nav-link" href="../../installation-guide/uninstalling-che-after-operatorhub-installation-using-openshift-cli/">Using OpenShift CLI</a> |
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| <a class="nav-link" href="../../installation-guide/uninstalling-che-after-chectl-installation/">Using chectl</a> |
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| <a class="nav-link" href="../../administration-guide/che-architecture-overview/">Che architecture</a> |
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| <a class="nav-link" href="../../administration-guide/che-workspace-controller/">Che workspace controller</a> |
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| <a class="nav-link" href="../../administration-guide/che-workspaces-architecture/">Che workspaces architecture</a> |
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| <a class="nav-link" href="../../administration-guide/calculating-che-resource-requirements/">Calculating Che resource requirements</a> |
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| <a class="nav-link" href="../../administration-guide/building-custom-registry-images/">Building custom registry images</a> |
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| <a class="nav-link" href="../../administration-guide/running-custom-registries/">Running custom registries</a> |
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| <article class="doc"> |
| <h1 class="page">Importing Kubernetes applications into a workspace</h1> |
| <div id="preamble"> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This section describes how to import Kubernetes or OpenShift applications into a Che workspace.</p> |
| </div> |
| <div class="paragraph"> |
| <p>For demonstration purposes, the section uses a sample Kubernetes or OpenShift application having the following two Pods:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>A Node.js application specified by this <a href="https://raw.githubusercontent.com/redhat-developer/devfile/master/samples/web-nodejs-with-db-sample/nodejs-app.yaml">nodejs-app.yaml</a></p> |
| </li> |
| <li> |
| <p>A MongoDB Pod specified by this <a href="https://raw.githubusercontent.com/redhat-developer/devfile/master/samples/web-nodejs-with-db-sample/mongo-db.yaml">mongo-db.yaml</a></p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>To run the application on a Kubernetes or OpenShift cluster:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre>$ node=https://raw.githubusercontent.com/redhat-developer/devfile/master/samples/web-nodejs-with-db-sample/nodejs-app.yaml && \ |
| mongo=https://raw.githubusercontent.com/redhat-developer/devfile/master/samples/web-nodejs-with-db-sample/mongo-db.yaml && \ |
| kubectl apply -f ${mongo} && \ |
| kubectl apply -f ${node}</pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>To deploy a new instance of this application in a Che workspace, use one of the following three scenarios:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>Starting from scratch: <a href="#including-kubernetes-applications-in-a-workspace-devfile-definition_che">Writing a new devfile</a></p> |
| </li> |
| <li> |
| <p>Modifying an existing workspace: <a href="#adding-a-kubernetes-application-to-an-existing-workspace-using-the-dashboard_che">Using the Dashboard user interface</a></p> |
| </li> |
| <li> |
| <p>From a running application: <a href="#generating-a-devfile-from-an-existing-kubernetes-application_che">Generating a devfile with <code>chectl</code></a></p> |
| </li> |
| </ul> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="including-kubernetes-applications-in-a-workspace-devfile-definition_che"><a class="anchor" href="#including-kubernetes-applications-in-a-workspace-devfile-definition_che"></a>Including a Kubernetes or OpenShift application in a workspace devfile definition</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This procedure describes how to define a Che workspace devfile to include a Kubernetes application.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The devfile format is used to define a Che workspace, and its format is described in the <a href="../configuring-a-workspace-using-a-devfile/" class="page">Configuring a workspace using a devfile</a> section.</p> |
| </div> |
| <div class="ulist"> |
| <div class="title">Prerequisites</div> |
| <ul> |
| <li> |
| <p>You are logged in to the cluster with a running instance of Eclipse Che. To install an instance of Eclipse Che, see <a href="../../installation-guide/installing-che/" class="page">Installing Che</a>.</p> |
| </li> |
| <li> |
| <p><code>chectl</code> management tool is available. See <a href="../../installation-guide/using-the-chectl-management-tool/" class="page">Using the chectl management tool</a>.</p> |
| </li> |
| </ul> |
| </div> |
| <div class="olist arabic"> |
| <div class="title">Procedure</div> |
| <ol class="arabic"> |
| <li> |
| <p>Create the simplest devfile:</p> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-yaml hljs" data-lang="yaml">apiVersion: 1.0.0 |
| metadata: |
| name: minimal-workspace <i class="conum" data-value="1"></i><b>(1)</b></code></pre> |
| </div> |
| </div> |
| <div class="colist arabic"> |
| <table> |
| <tr> |
| <td><i class="conum" data-value="1"></i><b>1</b></td> |
| <td>Only the name <code>minimal-workspace</code> is specified. After the Che server processes this devfile, the devfile is converted to a minimal Che workspace that only has the default editor (Che-Theia) and the default editor plug-ins, including, for example, the terminal.</td> |
| </tr> |
| </table> |
| </div> |
| </li> |
| <li> |
| <p>To add Kubernetes applications to a workspace, modify the devfile and add the <code>Kubernetes</code> component type.</p> |
| <div class="paragraph"> |
| <p>For example, to embed the NodeJS-Mongo application in the <code>minimal-workspace</code>:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-yaml hljs" data-lang="yaml">apiVersion: 1.0.0 |
| metadata: |
| name: minimal-workspace |
| components: |
| - type: kubernetes |
| reference: https://raw.githubusercontent.com/.../mongo-db.yaml |
| - alias: nodejs-app |
| type: kubernetes |
| reference: https://raw.githubusercontent.com/.../nodejs-app.yaml |
| entrypoints: |
| - command: ['sleep'] <i class="conum" data-value="1"></i><b>(1)</b> |
| args: ['infinity']</code></pre> |
| </div> |
| </div> |
| <div class="colist arabic"> |
| <table> |
| <tr> |
| <td><i class="conum" data-value="1"></i><b>1</b></td> |
| <td>The <code>sleep infinity</code> command is added as the entrypoint of the Node.js application. The command prevents the application from starting at the workspace start phase. This configuration allows the user to start the application when needed for testing or debugging purposes.</td> |
| </tr> |
| </table> |
| </div> |
| </li> |
| <li> |
| <p>Add the commands in the devfile to make it easier for a developer to test the application:</p> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-yaml hljs" data-lang="yaml">apiVersion: 1.0.0 |
| metadata: |
| name: minimal-workspace |
| components: |
| - type: kubernetes |
| reference: https://raw.githubusercontent.com/.../mongo-db.yaml |
| - alias: nodejs-app |
| type: kubernetes |
| reference: https://raw.githubusercontent.com/.../nodejs-app.yaml |
| entrypoints: |
| - command: ['sleep'] |
| args: ['infinity'] |
| commands: |
| - name: run <i class="conum" data-value="1"></i><b>(1)</b> |
| actions: |
| - type: exec |
| component: nodejs-app |
| command: cd ${CHE_PROJECTS_ROOT}/nodejs-mongo-app/EmployeeDB/ && npm install && sed -i -- ''s/localhost/mongo/g'' app.js && node app.js</code></pre> |
| </div> |
| </div> |
| <div class="colist arabic"> |
| <table> |
| <tr> |
| <td><i class="conum" data-value="1"></i><b>1</b></td> |
| <td>The <code>run</code> command added to the devfile is available as a task in Che-Theia from the command palette. When executed, the command starts the Node.js application.</td> |
| </tr> |
| </table> |
| </div> |
| </li> |
| <li> |
| <p>Use the devfile to create and start a workspace:</p> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre>$ chectl workspace:start --devfile <em><devfile-path></em></pre> |
| </div> |
| </div> |
| </li> |
| </ol> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="adding-a-kubernetes-application-to-an-existing-workspace-using-the-dashboard_che"><a class="anchor" href="#adding-a-kubernetes-application-to-an-existing-workspace-using-the-dashboard_che"></a>Adding a Kubernetes or OpenShift application to an existing workspace using the dashboard</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This procedure demonstrates how to modify an existing workspace and import the Kubernetes or OpenShift application using the newly created devfile.</p> |
| </div> |
| <div class="ulist"> |
| <div class="title">Prerequisites</div> |
| <ul> |
| <li> |
| <p>A running instance of Che. To install an instance of Che, see <a href="../../installation-guide/installing-che/" class="page">Installing Che</a>.</p> |
| </li> |
| <li> |
| <p>An existing workspace defined on this instance of Che.</p> |
| </li> |
| </ul> |
| </div> |
| <div class="olist arabic"> |
| <div class="title">Procedure</div> |
| <ol class="arabic"> |
| <li> |
| <p>After the creation of a workspace, use the <strong>Workspace</strong> menu and then click on the desired workspace.</p> |
| </li> |
| <li> |
| <p>Modify the workspace devfile, use the <strong>Devfile</strong> tab.</p> |
| </li> |
| <li> |
| <p>Add a Kubernetes or OpenShift component.</p> |
| </li> |
| <li> |
| <p>For the changes to take effect, save the devfile and restart the Che workspace.</p> |
| </li> |
| </ol> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="generating-a-devfile-from-an-existing-kubernetes-application_che"><a class="anchor" href="#generating-a-devfile-from-an-existing-kubernetes-application_che"></a>Generating a devfile from an existing Kubernetes or OpenShift application</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This procedure demonstrates how to generate a devfile from an existing Kubernetes or OpenShift application using the <code>chectl</code> tool.</p> |
| </div> |
| <div class="ulist"> |
| <div class="title">Prerequisites</div> |
| <ul> |
| <li> |
| <p>A running instance of Che. To install an instance of Che, see <a href="../../installation-guide/installing-che/" class="page">Installing Che</a>.</p> |
| </li> |
| <li> |
| <p>The <code>chectl</code> management tool is available. See <a href="../../installation-guide/using-the-chectl-management-tool/" class="page">Using the chectl management tool</a>.</p> |
| </li> |
| <li> |
| <p>You are logged in to Che. See <a href="../navigating-che-using-the-dashboard/#logging-in-to-che-using-chectl_che" class="page">How to login into Che using chectl</a></p> |
| </li> |
| </ul> |
| </div> |
| <div class="olist arabic"> |
| <div class="title">Procedure</div> |
| <ol class="arabic"> |
| <li> |
| <p>To generate a devfile, use:</p> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre>$ chectl devfile:generate</pre> |
| </div> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>It is also possible to generate a devfile from, for example, the <code>NodeJS-MongoDB</code> application that includes the <code>NodeJS</code> component, using the <code>chectl devfile:generate</code> command:</p> |
| <div class="listingblock"> |
| <div class="title">Example:</div> |
| <div class="content"> |
| <pre>$ chectl devfile:generate --selector="app=nodejs" |
| apiVersion: 1.0.0 |
| metadata: |
| name: chectl-generated |
| components: |
| - type: kubernetes |
| alias: app=nodejs |
| referenceContent: | |
| kind: List |
| apiVersion: v1 |
| metadata: |
| name: app=nodejs |
| items: |
| - apiVersion: apps/v1 |
| kind: Deployment |
| metadata: |
| labels: |
| app: nodejs |
| name: web |
| (...)</pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>The Node.js application YAML definition is available in the devfile, inline, using the <code>referenceContent</code> attribute.</p> |
| </div> |
| </li> |
| <li> |
| <p>To include support for a language, use the <code>--language</code> parameter:</p> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre>$ chectl devfile:generate --selector="app=nodejs" --language="typescript" |
| apiVersion: 1.0.0 |
| metadata: |
| name: chectl-generated |
| components: |
| - type: kubernetes |
| alias: app=nodejs |
| referenceContent: | |
| kind: List |
| apiVersion: v1 |
| (...) |
| - type: chePlugin |
| alias: typescript-ls |
| id: che-incubator/typescript/latest</pre> |
| </div> |
| </div> |
| </li> |
| </ul> |
| </div> |
| </li> |
| <li> |
| <p>Use the generated devfile to start a Che workspace with <code>chectl</code>.</p> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre>$ chectl workspace:start --devfile=devfile​.yaml</pre> |
| </div> |
| </div> |
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