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| <a class="nav-link" href="../../installation-guide/using-the-chectl-management-tool/">Using the chectl management tool</a> |
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| <a class="nav-link" href="../../installation-guide/installing-che-in-a-restricted-environment/">Installing Che in restricted environment</a> |
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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/configuring-namespace-strategies/">Configuring workspace target namespace</a> |
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| <a class="nav-link" href="../../installation-guide/configuring-storage-types/">Configuring storage types</a> |
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| <a class="nav-link" href="../../installation-guide/configuring-the-number-of-workspaces-that-a-user-can-run/">Configuring the number of workspaces that a user can run</a> |
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| <a class="nav-link" href="../../installation-guide/configuring-the-number-of-workspaces-that-a-user-can-create/">Configuring the number of workspaces that a user can create</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-ingresses/">Configuring Kubernetes Ingress</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 or a ConfigMap as a file or an environment variable into a Eclipse Che container</a> |
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| <a class="nav-link" href="../../installation-guide/enabling-dev-workspace-engine/">Enabling Dev Workspace engine</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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| <article class="doc"> |
| <h1 class="page">Understanding Che workspaces architecture</h1> |
| <div class="sect1"> |
| <h2 id="che-workspaces-architecture_che"><a class="anchor" href="#che-workspaces-architecture_che"></a>Che workspaces architecture</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>A Che deployment on the cluster consists of the Che server component, a database for storing user profile and preferences, and several additional deployments hosting workspaces. The Che server orchestrates the creation of workspaces, which consist of a deployment containing the workspace containers and enabled plug-ins, plus related components, such as:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>ConfigMaps</p> |
| </li> |
| <li> |
| <p>services</p> |
| </li> |
| <li> |
| <p>endpoints</p> |
| </li> |
| <li> |
| <p>ingresses/routes</p> |
| </li> |
| <li> |
| <p>secrets</p> |
| </li> |
| <li> |
| <p>PVs</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>The Che workspace is a web application. It is composed of microservices running in containers that provide all the services of a modern IDE such as an editor, language auto-completion, and debugging tools. The IDE services are deployed with the development tools, packaged in containers and user runtime applications, which are defined as Kubernetes resources.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The source code of the projects of a Che workspace is persisted in a Kubernetes or OpenShift <code>PersistentVolume</code>. Microservices run in containers that have read-write access to the source code (IDE services, development tools), and runtime applications have read-write access to this shared directory.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The following diagram shows the detailed components of a Che workspace.</p> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <img src="../_images/architecture/che-workspaces.png" alt="che workspaces"> |
| </div> |
| <div class="title">Figure 1. Che workspace components</div> |
| </div> |
| <div class="paragraph"> |
| <p>In the diagram, there are four running workspaces: two belonging to <strong>User A</strong>, one to <strong>User B</strong> and one to <strong>User C</strong>.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Use the devfile format to specify the tools and runtime applications of a Che workspace.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="che-workspace-components_che"><a class="anchor" href="#che-workspace-components_che"></a>Che workspace components</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This section describes the components of a Che workspace.</p> |
| </div> |
| <div class="sect2"> |
| <h3 id="che-plug-ins_che"><a class="anchor" href="#che-plug-ins_che"></a><code>Che Plugin</code> plug-ins</h3> |
| <div class="paragraph"> |
| <p><code>Che Plugin</code> plug-ins are special services that extend Che workspace capabilities. <code>Che Plugin</code> plug-ins are packaged as containers. Packaging plug-ins into a container has the following benefits:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>It isolates the plug-ins from the main IDE, therefore limiting the resources that a plug-in has access to.</p> |
| </li> |
| <li> |
| <p>It uses the consolidated standard of container registries to publish and distribute plug-ins (as with any container image).</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>The containers that plug-ins are packaged into run as sidecars of the Che workspace editor and augment its capabilities.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Visual Studio Code extensions packaged in containers are Che plug-ins for the Che-Theia editor.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Multiple Che plug-ins can run in the same container (for better resource use), or a Che Plugin can run in its dedicated container (for better isolation).</p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="che-editor-plug-in_che"><a class="anchor" href="#che-editor-plug-in_che"></a><code>Che Editor</code> plug-in</h3> |
| <div class="paragraph"> |
| <p>A <code>Che Editor</code> plug-in is a Che workspace plug-in. |
| It defines the web application that is used as an editor in a workspace. |
| The default Che workspace editor is <a href="https://github.com/eclipse-che/che-theia">Che-Theia</a>. |
| It is a web-based source-code editor similar to <a href="https://code.visualstudio.com/">Visual Studio Code</a> (VS Code). |
| It has a plug-in system that supports VS Code extensions.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stretch"> |
| <colgroup> |
| <col style="width: 50%;"> |
| <col style="width: 50%;"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Source code</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><a href="https://github.com/eclipse-che/che-theia">Che-Theia</a></p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Container image</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><code>eclipse/che-theia</code></p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Endpoints</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><code>theia</code>, <code>webviews</code>, <code>theia-dev</code>, <code>theia-redirect-1</code>, <code>theia-redirect-2</code>, <code>theia-redirect-3</code></p></td> |
| </tr> |
| </tbody> |
| </table> |
| <div class="ulist"> |
| <div class="title">Additional resources</div> |
| <ul> |
| <li> |
| <p><a href="https://github.com/eclipse-che/che-theia">Che-Theia</a></p> |
| </li> |
| <li> |
| <p><a href="https://github.com/theia-ide/theia">Eclipse Theia open-source project</a></p> |
| </li> |
| <li> |
| <p><a href="https://code.visualstudio.com/">Visual Studio Code</a></p> |
| </li> |
| </ul> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="che-user-runtimes_che"><a class="anchor" href="#che-user-runtimes_che"></a>Che user runtimes</h3> |
| <div class="paragraph"> |
| <p>Use any non-terminating user container as a user runtime. An application that can be defined as a container image or as a set of Kubernetes or OpenShift resources can be included in a Che workspace. This makes it easy to test applications in the Che workspace.</p> |
| </div> |
| <div class="paragraph"> |
| <p>To test an application in the Che workspace, include the application YAML definition used in stage or production in the workspace specification. It is a 12-factor application development / production parity.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Examples of user runtimes are Node.js, SpringBoot or MongoDB, and MySQL.</p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="che-workspace-jwt-proxy_che"><a class="anchor" href="#che-workspace-jwt-proxy_che"></a>Che workspace JWT proxy</h3> |
| <div class="paragraph"> |
| <p>The JWT proxy is responsible for securing the communication of the Che workspace services. The Che workspace JWT proxy is included in a Che workspace only if the Che server is configured in multi-user mode.</p> |
| </div> |
| <div class="paragraph"> |
| <p>An HTTP proxy is used to sign outgoing requests from a workspace service to the Che server and to authenticate incoming requests from the IDE client running on a browser.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stretch"> |
| <colgroup> |
| <col style="width: 50%;"> |
| <col style="width: 50%;"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Source code</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><a href="https://github.com/eclipse/che-jwtproxy">JWT proxy</a></p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Container image</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><code>eclipse/che-jwtproxy</code></p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="sect2"> |
| <h3 id="che-plug-in-broker_che"><a class="anchor" href="#che-plug-in-broker_che"></a>Che plug-ins broker</h3> |
| <div class="paragraph"> |
| <p>Plug-in brokers are special services that, given a plug-in <code>meta.yaml</code> file:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>Gather all the information to provide a plug-in definition that the Che server knows.</p> |
| </li> |
| <li> |
| <p>Perform preparation actions in the workspace namespace (download, unpack files, process configuration).</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>The main goal of the plug-in broker is to decouple the Che plug-ins definitions from the actual plug-ins that Che can support. With brokers, Che can support different plug-ins without updating the Che server.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The Che server starts the plug-in broker. The plug-in broker runs in the same Kubernetes namespace or OpenShift project as the workspace. It has access to the plug-ins and project persistent volumes.</p> |
| </div> |
| <div class="paragraph"> |
| <p>A plug-ins broker is defined as a container image (for example, <code>eclipse/che-plugin-broker</code>). The plug-in type determines the type of the broker that is started. Two types of plug-ins are supported: <code>Che Plugin</code> and <code>Che Editor</code>.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stretch"> |
| <colgroup> |
| <col style="width: 50%;"> |
| <col style="width: 50%;"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Source code</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><a href="https://github.com/eclipse/che-plugin-broker">Che Plug-in broker</a></p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Container image</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock"><code>quay.io/eclipse/che-plugin-artifacts-broker</code><br> |
| <code>eclipse/che-plugin-metadata-broker</code></p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="che-workspace-creation-flow_che"><a class="anchor" href="#che-workspace-creation-flow_che"></a>Che workspace creation flow</h2> |
| <div class="sectionbody"> |
| <div class="imageblock"> |
| <div class="content"> |
| <img src="../_images/architecture/che-workspace-creation-flow.png" alt="che workspace creation flow"> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>The following is a Che workspace creation flow:</p> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic"> |
| <li> |
| <p>A user starts a Che workspace defined by:</p> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>An editor (the default is Che-Theia)</p> |
| </li> |
| <li> |
| <p>A list of plug-ins (for example, Java and Kubernetes or OpenShift tools)</p> |
| </li> |
| <li> |
| <p>A list of runtime applications</p> |
| </li> |
| </ul> |
| </div> |
| </li> |
| <li> |
| <p>Che server retrieves the editor and plug-in metadata from the plug-in registry.</p> |
| </li> |
| <li> |
| <p>For every plug-in type, Che server starts a specific plug-in broker.</p> |
| </li> |
| <li> |
| <p>The Che plug-ins broker transforms the plug-in metadata into a Che Plugin definition. It executes the following steps:</p> |
| <div class="olist loweralpha"> |
| <ol class="loweralpha" type="a"> |
| <li> |
| <p>Downloads a plug-in and extracts its content.</p> |
| </li> |
| <li> |
| <p>Processes the plug-in <code>meta.yaml</code> file and sends it back to Che server in the format of a Che Plugin.</p> |
| </li> |
| </ol> |
| </div> |
| </li> |
| <li> |
| <p>Che server starts the editor and the plug-in sidecars.</p> |
| </li> |
| <li> |
| <p>The editor loads the plug-ins from the plug-in persistent volume.</p> |
| </li> |
| </ol> |
| </div> |
| </div> |
| </div> |
| </article> |
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