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Chapter 30. Customizing the Web Console

30.1. Overview

Administrators can customize the web console using extensions, which let you run scripts and load custom stylesheets when the web console loads. Extension scripts allow you to override the default behavior of the web console and customize it for your needs.

For example, extension scripts can be used to add your own company’s branding or to add company-specific capabilities. A common use case for this is rebranding or white-labelling for different environments. You can use the same extension code, but provide settings that change the web console. You can change the look and feel of nearly any aspect of the user interface in this way.

30.2. Loading Extension Scripts and Stylesheets

To add scripts and stylesheets, edit the master configuration file. The scripts and stylesheet files must exist on the Asset Server and are added with the following options: 

assetConfig:
  ...
  extensionScripts:
    - /path/to/script1.js
    - /path/to/script2.js
    - ...
  extensionStylesheets:
    - /path/to/stylesheet1.css
    - /path/to/stylesheet2.css
    - ...
Note

Wrap extension scripts in an Immediately Invoked Function Expression (IIFE). This ensures that you do not create global variables that conflict with the names used by the web console or by other extensions. For example: 

(function() {
  // Put your extension code here...
}());

Relative paths are resolved relative to the master configuration file. To pick up configuration changes, restart the server.

Custom scripts and stylesheets are read once at server start time. To make developing extensions easier, you can reload scripts and stylesheets on every request by enabling development mode with the following setting: 

assetConfig:
  ...
  extensionDevelopment: true

When set, the web console reloads any changes to existing extension script or stylesheet files when you refresh the page in your browser. You still must restart the server when adding new extension stylesheets or scripts, however. This setting is only recommended for testing changes and not for production.

The examples in the following sections show common ways you can customize the web console.

Note

Additional extension examples are available in the OpenShift Origin repository on GitHub.

30.2.1. Setting Extension Properties

If you have a specific extension, but want to use different text in it for each of the environments, you can define the environment in the master-config.yaml file, and use the same extension script across environments. Pass settings from the master-config.yaml file to be used by the extension using the extensionProperties mechanism: 

assetConfig:
  extensionDevelopment: true
  extensionProperties:
    doc_url: https://docs.openshift.com
    key1: value1
    key2: value2
  extensionScripts:

This results in a global variable that can be accessed by the extension, as if the following code was executed: 

window.OPENSHIFT_EXTENSION_PROPERTIES = {
  doc_url: "https://docs.openshift.com",
  key1: "value1",
  key2: "value2",
}

30.2.5. Customizing the About Page

To provide a custom About page for the web console:

  1. Write an extension that looks like: 

    angular
  .module('aboutPageExtension', ['openshiftConsole'])
  .config(function($routeProvider) {
    $routeProvider
      .when('/about', {
        templateUrl: 'extensions/about/about.html',
        controller: 'AboutController'
      });
    }
  );
  2. Save the script to a file (for example, about/about.js).

  3. Write a customized template.

    1. Start from the version of about.html from the OpenShift Container Platform release you are using. Within the template, there are two angular scope variables available: version.master.openshift and version.master.kubernetes.
    2. Save the custom template to a file (for example, about/about.html).

    3. Modify the master configuration file: 

      assetConfig:
  ...
  extensionScripts:
    - about/about.js
  ...
  extensions:
    - name: about
      sourceDirectory: /path/to/about

30.2.6. Configuring Navigation Menus

30.2.6.1. Top Navigation Dropdown Menus

The top navigation bar of the web console contains the help icon and the user dropdown menus. You can add additional menu items to these using the angular-extension-registry.

The available extension points are:

  • nav-help-dropdown - the help icon dropdown menu, visible at desktop screen widths
  • nav-user-dropdown - the user dropdown menu, visible at desktop screen widths
  • nav-dropdown-mobile - the single menu for top navigation items at mobile screen widths

The following example extends the nav-help-dropdown menu, with a name of <myExtensionModule>:

Note

<myExtensionModule> is a placeholder name. Each dropdown menu extension must be unique enough so that it does not clash with any future angular modules. 

angular
  .module('<myExtensionModule>', ['openshiftConsole'])
  .run([
    'extensionRegistry',
    function(extensionRegistry) {
      extensionRegistry
        .add('nav-help-dropdown', function() {
          return [
            {
              type: 'dom',
              node: '<li><a href="http://www.example.com/report" target="_blank">Report a Bug</a></li>'
            }, {
              type: 'dom',
              node: '<li class="divider"></li>'  // If you want a horizontal divider to appear in the menu
            }, {
              type: 'dom',
              node: '<li><a href="http://www.example.com/status" target="_blank">System Status</a></li>'
            }
          ];
        });
    }
  ]);

hawtioPluginLoader.addModule('<myExtensionModule>');

30.2.6.2. Project Left Navigation

When navigating within a project, a menu appears on the left with primary and secondary navigation. This menu structure is defined as a constant and can be overridden or modified.

Note

Significant customizations to the project navigation may affect the user experience and should be done with careful consideration. You may need to update this customization in future upgrades if you modify existing navigation items.

  1. Create the configuration scripts within a file (for example, navigation.js): 

    // Append a new primary nav item.  This is a simple direct navigation item
// with no secondary menu.
window.OPENSHIFT_CONSTANTS.PROJECT_NAVIGATION.push({
  label: "Dashboard",           // The text label
  iconClass: "fa fa-dashboard", // The icon you want to appear
  href: "/dashboard"            // Where to go when this nav item is clicked.
                                // Relative URLs are pre-pended with the path
                                // '/project/<project-name>'
});

// Splice a primary nav item to a specific spot in the list.  This primary item has
// a secondary menu.
window.OPENSHIFT_CONSTANTS.PROJECT_NAVIGATION.splice(2, 0, { // Insert at the third spot
  label: "Git",
  iconClass: "fa fa-code",
  secondaryNavSections: [       // Instead of an href, a sub-menu can be defined
    {
      items: [
        {
          label: "Branches",
          href: "/git/branches",
          prefixes: [
            "/git/branches/"     // Defines prefix URL patterns that will cause
                                 // this nav item to show the active state, so
                                 // tertiary or lower pages show the right context
          ]
        }
      ]
    },
    {
      header: "Collaboration",   // Sections within a sub-menu can have an optional header
      items: [
        {
          label: "Pull Requests",
          href: "/git/pull-requests",
          prefixes: [
            "/git/pull-requests/"
          ]
        }
      ]
    }
  ]
});

// Add a primary item to the top of the list.  This primary item is shown conditionally.
window.OPENSHIFT_CONSTANTS.PROJECT_NAVIGATION.unshift({
  label: "Getting Started",
  iconClass: "pficon pficon-screen",
  href: "/getting-started",
  prefixes: [                   // Primary nav items can also specify prefixes to trigger
    "/getting-started/"         // active state
  ],
  isValid: function() {         // Primary or secondary items can define an isValid
    return isNewUser;           // function. If present it will be called to test whether
                                // the item should be shown, it should return a boolean
  }
});

// Modify an existing menu item
var applicationsMenu = _.find(window.OPENSHIFT_CONSTANTS.PROJECT_NAVIGATION, { label: 'Applications' });
applicationsMenu.secondaryNavSections.push({ // Add a new secondary nav section to the Applications menu
  // my secondary nav section
});

  2. Save the file and add it to the master configuration at /etc/origin/master/master-config.yml: 

    assetConfig:
  ...
  extensionScripts:
    - /path/to/navigation.js

  3. Restart the master host: 

    # systemctl restart atomic-openshift-master

30.2.7. Enabling Features in Technology Preview

Sometimes features are available in Technology Preview. By default, these features are disabled in the web console and hidden from end users.

Web console features currently in Technology Preview include:

Feature NameDescriptionScript Value

Pipelines

Enabling this feature will add the Pipelines navigation item underneath the Builds menu.

pipelines

To enable a Technology Preview feature:

  1. Save this script to a file (for example, tech-preview.js): 

    window.OPENSHIFT_CONSTANTS.ENABLE_TECH_PREVIEW_FEATURE.<feature_name> = true;

  2. Add it to the master configuration file: 

    assetConfig:
  ...
  extensionScripts:
    - /path/to/tech-preview.js

30.3. Serving Static Files

You can serve other files from the Asset Server as well. For example, you might want to make the CLI executable available for download from the web console or add images to use in a custom stylesheet.

Add the directory with the files you want using the following configuration option: 

assetConfig:
  ...
  extensions:
    - name: images
      sourceDirectory: /path/to/my_images

The files under the /path/to/my_images directory will be available under the URL /<context>/extensions/images in the web console.

To reference these files from a stylesheet, you should generally use a relative path. For example: 

#header-logo {
  background-image: url("../extensions/images/my-logo.png");
}

30.3.1. Enabling HTML5 Mode

The web console has a special mode for supporting certain static web applications that use the HTML5 history API: 

assetConfig:
  ...
  extensions:
    - name: my_extension
      sourceDirectory: /path/to/myExtension
      html5Mode: true

Setting html5Mode to true enables two behaviors:

  1. Any request for a non-existent file under /<context>/extensions/my_extension/ instead serves /path/to/myExtension/index.html rather than a "404 Not Found" page.
  2. The element <base href="/"> will be rewritten in /path/to/myExtension/index.html to use the actual base depending on the asset configuration; only this exact string is rewritten.

This is needed for JavaScript frameworks such as AngularJS that require base to be set in index.html.

30.4. Customizing the Login Page

You can also change the login page, and the login provider selection page for the web console. Run the following commands to create templates you can modify: 

$ oadm create-login-template > login-template.html
$ oadm create-provider-selection-template > provider-selection-template.html

Edit the file to change the styles or add content, but be careful not to remove any required parameters inside the curly brackets.

To use your custom login page or provider selection page, set the following options in the master configuration file: 

oauthConfig:
  ...
  templates:
    login: /path/to/login-template.html
    providerSelection: /path/to/provider-selection-template.html

Relative paths are resolved relative to the master configuration file. You must restart the server after changing this configuration.

When there are multiple login providers configured or when the alwaysShowProviderSelection option in the master-config.yaml file is set to true, each time a user’s token to OpenShift Container Platform expires, the user is presented with this custom page before they can proceed with other tasks.

30.4.1. Example Usage

Custom login pages can be used to create Terms of Service information. They can also be helpful if you use a third-party login provider, like GitHub or Google, to show users a branded page that they trust and expect before being redirected to the authentication provider.

30.5. Customizing the OAuth Error Page

When errors occur during authentication, you can change the page shown.

  1. Run the following command to create a template you can modify: 

    $ oadm create-error-template > error-template.html

  2. Edit the file to change the styles or add content.

    You can use the Error and ErrorCode variables in the template. To use your custom error page, set the following option in the master configuration file: 

    oauthConfig:
  ...
  templates:
    error: /path/to/error-template.html

    Relative paths are resolved relative to the master configuration file.

  3. You must restart the server after changing this configuration.

30.6. Changing the Logout URL

You can change the location a console user is sent to when logging out of the console by modifying the logoutURL parameter in the /etc/origin/master/master-config.yaml file: 

...
assetConfig:
  logoutURL: "http://www.example.com"
...

This can be useful when authenticating with Request Header and OAuth or OpenID identity providers, which require visiting an external URL to destroy single sign-on sessions.

30.7. Configuring Web Console Customizations with Ansible

During advanced installations, many modifications to the web console can be configured using the following parameters, which are configurable in the inventory file:

Example Web Console Customization with Ansible

# Configure logoutURL in the master config for console customization
# See: https://docs.openshift.com/enterprise/latest/install_config/web_console_customization.html#changing-the-logout-url
#openshift_master_logout_url=http://example.com

# Configure extensionScripts in the master config for console customization
# See: https://docs.openshift.com/enterprise/latest/install_config/web_console_customization.html#loading-custom-scripts-and-stylesheets
#openshift_master_extension_scripts=['/path/on/host/to/script1.js','/path/on/host/to/script2.js']

# Configure extensionStylesheets in the master config for console customization
# See: https://docs.openshift.com/enterprise/latest/install_config/web_console_customization.html#loading-custom-scripts-and-stylesheets
#openshift_master_extension_stylesheets=['/path/on/host/to/stylesheet1.css','/path/on/host/to/stylesheet2.css']

# Configure extensions in the master config for console customization
# See: https://docs.openshift.com/enterprise/latest/install_config/web_console_customization.html#serving-static-files
#openshift_master_extensions=[{'name': 'images', 'sourceDirectory': '/path/to/my_images'}]

# Configure extensions in the master config for console customization
# See: https://docs.openshift.com/enterprise/latest/install_config/web_console_customization.html#serving-static-files
#openshift_master_oauth_template=/path/on/host/to/login-template.html

# Configure metricsPublicURL in the master config for cluster metrics. Ansible is also able to configure metrics for you.
# See: https://docs.openshift.com/enterprise/latest/install_config/cluster_metrics.html
#openshift_master_metrics_public_url=https://hawkular-metrics.example.com/hawkular/metrics

# Configure loggingPublicURL in the master config for aggregate logging. Ansible is also able to install logging for you.
# See: https://docs.openshift.com/enterprise/latest/install_config/aggregate_logging.html
#openshift_master_logging_public_url=https://kibana.example.com

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