Building applications

1. In the Developer perspective, navigate to the Project page.
2. Select your project from the Project menu.
3. Select the Project Access tab.

4. Click Add access to add a new row of permissions to the default ones.

   Figure 2.2. Project permissions

   
5. Enter the user name, click the Select a role drop-down list, and select an appropriate role.
6. Click Save to add the new permissions.

Procedure

1. In the Administrator perspective, navigate to Administration → Cluster settings.
2. Click the Configuration tab.
3. From the Configuration resource list, select Console operator.openshift.io.
4. Navigate to the YAML tab to view and edit the YAML code.

5. In the YAML code under spec, customize the list of available cluster roles for project access. The following example specifies the default admin, edit, and view roles:

   apiVersion: operator.openshift.io/v1
   kind: Console
   metadata:
     name: cluster
   # ...
   spec:
     customization:
       projectAccess:
         availableClusterRoles:
         - admin
         - edit
         - view

6. Click Save to save the changes to the Console configuration resource.

Verification

1. In the Developer perspective, navigate to the Project page.
2. Select a project from the Project menu.
3. Select the Project access tab.
4. Click the menu in the Role column and verify that the available roles match the configuration that you applied to the Console resource configuration.

Procedure

1. In the Developer perspective, navigate to the +Add page.
2. Select your project from the Project menu.
3. Click on an item on the +Add page and then follow the workflow.

Procedure

1. Log in as a user with cluster-admin privileges.

2. Generate the default project template:

   $ oc adm create-bootstrap-project-template -o yaml > template.yaml

3. Use a text editor to modify the generated template.yaml file by adding objects or modifying existing objects.

4. The project template must be created in the openshift-config namespace. Load your modified template:

   $ oc create -f template.yaml -n openshift-config

5. Edit the project configuration resource using the web console or CLI.

   • Using the web console:

     1. Navigate to the Administration → Cluster Settings page.
     2. Click Configuration to view all configuration resources.
     3. Find the entry for Project and click Edit YAML.

   • Using the CLI:

     1. Edit the project.config.openshift.io/cluster resource:

        $ oc edit project.config.openshift.io/cluster

6. Update the spec section to include the projectRequestTemplate and name parameters, and set the name of your uploaded project template. The default name is project-request.

   Project configuration resource with custom project template

   apiVersion: config.openshift.io/v1
   kind: Project
   metadata:
   # ...
   spec:
     projectRequestTemplate:
       name: <template_name>
   # ...

7. After you save your changes, create a new project to verify that your changes were successfully applied.

Procedure

1. Log in as a user with cluster-admin privileges.

2. View the self-provisioners cluster role binding usage by running the following command:

   $ oc describe clusterrolebinding.rbac self-provisioners

   Example output

   Name:		self-provisioners
   Labels:		<none>
   Annotations:	rbac.authorization.kubernetes.io/autoupdate=true
   Role:
     Kind:	ClusterRole
     Name:	self-provisioner
   Subjects:
     Kind	Name				Namespace
     ----	----				---------
     Group	system:authenticated:oauth

   Review the subjects in the self-provisioners section.

3. Remove the self-provisioner cluster role from the group system:authenticated:oauth.

   • If the self-provisioners cluster role binding binds only the self-provisioner role to the system:authenticated:oauth group, run the following command:

     $ oc patch clusterrolebinding.rbac self-provisioners -p '{"subjects": null}'

   • If the self-provisioners cluster role binding binds the self-provisioner role to more users, groups, or service accounts than the system:authenticated:oauth group, run the following command:

     $ oc adm policy \
         remove-cluster-role-from-group self-provisioner \
         system:authenticated:oauth

4. Edit the self-provisioners cluster role binding to prevent automatic updates to the role. Automatic updates reset the cluster roles to the default state.

   • To update the role binding using the CLI:

     1. Run the following command:

        $ oc edit clusterrolebinding.rbac self-provisioners

     2. In the displayed role binding, set the rbac.authorization.kubernetes.io/autoupdate parameter value to false, as shown in the following example:

        apiVersion: authorization.openshift.io/v1
        kind: ClusterRoleBinding
        metadata:
          annotations:
            rbac.authorization.kubernetes.io/autoupdate: "false"
        # ...

   • To update the role binding by using a single command:

     $ oc patch clusterrolebinding.rbac self-provisioners -p '{ "metadata": { "annotations": { "rbac.authorization.kubernetes.io/autoupdate": "false" } } }'

5. Log in as an authenticated user and verify that it can no longer self-provision a project:

   $ oc new-project test

   Example output

   Error from server (Forbidden): You may not request a new project via this API.

   Consider customizing this project request message to provide more helpful instructions specific to your organization.

Procedure

1. Edit the project configuration resource using the web console or CLI.

   • Using the web console:

     1. Navigate to the Administration → Cluster Settings page.
     2. Click Configuration to view all configuration resources.
     3. Find the entry for Project and click Edit YAML.

   • Using the CLI:

     1. Log in as a user with cluster-admin privileges.

     2. Edit the project.config.openshift.io/cluster resource:

        $ oc edit project.config.openshift.io/cluster

2. Update the spec section to include the projectRequestMessage parameter and set the value to your custom message:

   Project configuration resource with custom project request message

   apiVersion: config.openshift.io/v1
   kind: Project
   metadata:
   # ...
   spec:
     projectRequestMessage: <message_string>
   # ...

   For example:

   apiVersion: config.openshift.io/v1
   kind: Project
   metadata:
   # ...
   spec:
     projectRequestMessage: To request a project, contact your system administrator at projectname@example.com.
   # ...

3. After you save your changes, attempt to create a new project as a developer or service account that is unable to self-provision projects to verify that your changes were successfully applied.

Procedure

1. In the +Add view, click the Samples tile to see the Samples page.
2. On the Samples page, select one of the available sample applications to see the Create Sample Application form.

3. In the Create Sample Application Form:

   • In the Name field, the deployment name is displayed by default. You can modify this name as required.
   • In the Builder Image Version, a builder image is selected by default. You can modify this image version by using the Builder Image Version drop-down list.
   • A sample Git repository URL is added by default.
4. Click Create to create the sample application. The build status of the sample application is displayed on the Topology view. After the sample application is created, you can see the deployment added to the application.

Procedure

1. In the +Add view, click the Getting Started resources → Build with guided documentation → View all quick starts link to view the Quick Starts page.
2. In the Quick Starts page, click the tile for the quick start that you want to use.
3. Click Start to begin the quick start.
4. Perform the steps that are displayed.

Procedure

1. In the +Add view, click From Git in the Git Repository tile to see the Import from git form.
2. In the Git section, enter the Git repository URL for the codebase you want to use to create an application. For example, enter the URL of this sample Node.js application https://github.com/sclorg/nodejs-ex. The URL is then validated.

3. Optional: You can click Show Advanced Git Options to add details such as:

   • Git Reference to point to code in a specific branch, tag, or commit to be used to build the application.
   • Context Dir to specify the subdirectory for the application source code you want to use to build the application.
   • Source Secret to create a Secret Name with credentials for pulling your source code from a private repository.

4. Optional: You can import a Devfile, a Dockerfile, Builder Image, or a Serverless Function through your Git repository to further customize your deployment.

   • If your Git repository contains a Devfile, a Dockerfile, a Builder Image, or a func.yaml, it is automatically detected and populated on the respective path fields.
   • If a Devfile, a Dockerfile, or a Builder Image are detected in the same repository, the Devfile is selected by default.
   • If func.yaml is detected in the Git repository, the Import Strategy changes to Serverless Function.
   • Alternatively, you can create a serverless function by clicking Create Serverless function in the +Add view using the Git repository URL.
   • To edit the file import type and select a different strategy, click Edit import strategy option.
   • If multiple Devfiles, a Dockerfiles, or a Builder Images are detected, to import a specific instance, specify the respective paths relative to the context directory.

5. After the Git URL is validated, the recommended builder image is selected and marked with a star. If the builder image is not auto-detected, select a builder image. For the https://github.com/sclorg/nodejs-ex Git URL, by default the Node.js builder image is selected.

   1. Optional: Use the Builder Image Version drop-down to specify a version.
   2. Optional: Use the Edit import strategy to select a different strategy.
   3. Optional: For the Node.js builder image, use the Run command field to override the command to run the application.

6. In the General section:

   1. In the Application field, enter a unique name for the application grouping, for example, myapp. Ensure that the application name is unique in a namespace.

   2. The Name field to identify the resources created for this application is automatically populated based on the Git repository URL if there are no existing applications. If there are existing applications, you can choose to deploy the component within an existing application, create a new application, or keep the component unassigned.

      Note

      The resource name must be unique in a namespace. Modify the resource name if you get an error.

7. In the Resources section, select:

   • Deployment, to create an application in plain Kubernetes style.
   • Deployment Config, to create an Red Hat OpenShift Service on AWS style application.

8. In the Pipelines section, select Add Pipeline, and then click Show Pipeline Visualization to see the pipeline for the application. A default pipeline is selected, but you can choose the pipeline you want from the list of available pipelines for the application.

   Note

   The Add pipeline checkbox is checked and Configure PAC is selected by default if the following criterias are fulfilled:

   • Pipeline operator is installed
   • pipelines-as-code is enabled
   • .tekton directory is detected in the Git repository

9. Add a webhook to your repository. If Configure PAC is checked and the GitHub App is set up, you can see the Use GitHub App and Setup a webhook options. If GitHub App is not set up, you can only see the Setup a webhook option:

   1. Go to Settings → Webhooks and click Add webhook.
   2. Set the Payload URL to the Pipelines as Code controller public URL.
   3. Select the content type as application/json.
   4. Add a webhook secret and note it in an alternate location. With openssl installed on your local machine, generate a random secret.
   5. Click Let me select individual events and select these events: Commit comments, Issue comments, Pull request, and Pushes.
   6. Click Add webhook.

10. Optional: In the Advanced Options section, the Target port and the Create a route to the application is selected by default so that you can access your application using a publicly available URL.

    If your application does not expose its data on the default public port, 80, clear the check box, and set the target port number you want to expose.

11. Optional: You can use the following advanced options to further customize your application:

    Routing

    By clicking the Routing link, you can perform the following actions:

    • Customize the hostname for the route.
    • Specify the path the router watches.
    • Select the target port for the traffic from the drop-down list.

    • Secure your route by selecting the Secure Route check box. Select the required TLS termination type and set a policy for insecure traffic from the respective drop-down lists.

      Note

      For serverless applications, the Knative service manages all the routing options above. However, you can customize the target port for traffic, if required. If the target port is not specified, the default port of 8080 is used.

    Health Checks

    Click the Health Checks link to add Readiness, Liveness, and Startup probes to your application. All the probes have prepopulated default data; you can add the probes with the default data or customize it as required.

    To customize the health probes:

    • Click Add Readiness Probe, if required, modify the parameters to check if the container is ready to handle requests, and select the check mark to add the probe.
    • Click Add Liveness Probe, if required, modify the parameters to check if a container is still running, and select the check mark to add the probe.

    • Click Add Startup Probe, if required, modify the parameters to check if the application within the container has started, and select the check mark to add the probe.

      For each of the probes, you can specify the request type - HTTP GET, Container Command, or TCP Socket, from the drop-down list. The form changes as per the selected request type. You can then modify the default values for the other parameters, such as the success and failure thresholds for the probe, number of seconds before performing the first probe after the container starts, frequency of the probe, and the timeout value.

    Build Configuration and Deployment

    Click the Build Configuration and Deployment links to see the respective configuration options. Some options are selected by default; you can customize them further by adding the necessary triggers and environment variables.

    For serverless applications, the Deployment option is not displayed as the Knative configuration resource maintains the desired state for your deployment instead of a DeploymentConfig resource.

    Scaling

    Click the Scaling link to define the number of pods or instances of the application you want to deploy initially.

    If you are creating a serverless deployment, you can also configure the following settings:

    • Min Pods determines the lower limit for the number of pods that must be running at any given time for a Knative service. This is also known as the minScale setting.
    • Max Pods determines the upper limit for the number of pods that can be running at any given time for a Knative service. This is also known as the maxScale setting.
    • Concurrency target determines the number of concurrent requests desired for each instance of the application at a given time.
    • Concurrency limit determines the limit for the number of concurrent requests allowed for each instance of the application at a given time.
    • Concurrency utilization determines the percentage of the concurrent requests limit that must be met before Knative scales up additional pods to handle additional traffic.
    • Autoscale window defines the time window over which metrics are averaged to provide input for scaling decisions when the autoscaler is not in panic mode. A service is scaled-to-zero if no requests are received during this window. The default duration for the autoscale window is 60s. This is also known as the stable window.

    Resource Limit

    Click the Resource Limit link to set the amount of CPU and Memory resources a container is guaranteed or allowed to use when running.

    Labels

    Click the Labels link to add custom labels to your application.

12. Click Create to create the application and a success notification is displayed. You can see the build status of the application in the Topology view.

Procedure

1. In the +Add view, click Container images to view the Deploy Images page.

2. In the Image section:

   1. Select Image name from external registry to deploy an image from a public or a private registry, or select Image stream tag from internal registry to deploy an image from an internal registry.
   2. Select an icon for your image in the Runtime icon tab.

3. In the General section:

   1. In the Application name field, enter a unique name for the application grouping.
   2. In the Name field, enter a unique name to identify the resources created for this component.

4. In the Resource type section, select the resource type to generate:

   1. Select Deployment to enable declarative updates for Pod and ReplicaSet objects.
   2. Select DeploymentConfig to define the template for a Pod object, and manage deploying new images and configuration sources.
5. Click Create. You can view the build status of the application in the Topology view.

Procedure

1. In the Topology view, right-click anywhere to view the Add to Project menu.
2. Hover over the Add to Project menu to see the menu options, and then select the Upload JAR file option to see the Upload JAR file form. Alternatively, you can drag the JAR file into the Topology view.
3. In the JAR file field, browse for the required JAR file on your local machine and upload it. Alternatively, you can drag the JAR file on to the field. A toast alert is displayed at the top right if an incompatible file type is dragged into the Topology view. A field error is displayed if an incompatible file type is dropped on the field in the upload form.
4. The runtime icon and builder image are selected by default. If a builder image is not auto-detected, select a builder image. If required, you can change the version using the Builder Image Version drop-down list.
5. Optional: In the Application Name field, enter a unique name for your application to use for resource labelling.
6. In the Name field, enter a unique component name for the associated resources.
7. Optional: Use the Resource type drop-down list to change the resource type.
8. In the Advanced options menu, click Create a Route to the Application to configure a public URL for your deployed application.
9. Click Create to deploy the application. A toast notification is shown to notify you that the JAR file is being uploaded. The toast notification also includes a link to view the build logs.

Procedure

1. Navigate to Developer Perspective → +Add → Developer Catalog → All Services. A list of all the available services in the Developer Catalog is displayed.
2. Under Type, click Devfiles to browse for devfiles that support a particular language or framework. Alternatively, you can use the keyword filter to search for a particular devfile using their name, tag, or description.
3. Click the devfile you want to use to create an application. The devfile tile displays the details of the devfile, including the name, description, provider, and the documentation of the devfile.
4. Click Create to create an application and view the application in the Topology view.

Procedure

1. In the Developer perspective, navigate to the +Add view and from the Developer Catalog tile, click All Services to view all the available services in the Developer Catalog.
2. Under All Services, select the kind of service or the component you need to add to your project. For this example, select Databases to list all the database services and then click MariaDB to see the details for the service.

3. Click Instantiate Template to see an automatically populated template with details for the MariaDB service, and then click Create to create and view the MariaDB service in the Topology view.

   Figure 3.1. MariaDB in Topology

   

Procedure

1. Create a new project in the Red Hat OpenShift Service on AWS web console for this procedure. This example uses a project called my-etcd.

2. Navigate to the Operators → Installed Operators page. The Operators that have been installed to the cluster by the dedicated-admin and are available for use are shown here as a list of cluster service versions (CSVs). CSVs are used to launch and manage the software provided by the Operator.

   Tip

   You can get this list from the CLI using:

   $ oc get csv

3. On the Installed Operators page, click the etcd Operator to view more details and available actions.

   As shown under Provided APIs, this Operator makes available three new resource types, including one for an etcd Cluster (the EtcdCluster resource). These objects work similar to the built-in native Kubernetes ones, such as Deployment or ReplicaSet, but contain logic specific to managing etcd.

4. Create a new etcd cluster:

   1. In the etcd Cluster API box, click Create instance.
   2. The next page allows you to make any modifications to the minimal starting template of an EtcdCluster object, such as the size of the cluster. For now, click Create to finalize. This triggers the Operator to start up the pods, services, and other components of the new etcd cluster.

5. Click the example etcd cluster, then click the Resources tab to see that your project now contains a number of resources created and configured automatically by the Operator.

   Verify that a Kubernetes service has been created that allows you to access the database from other pods in your project.

6. All users with the edit role in a given project can create, manage, and delete application instances (an etcd cluster, in this example) managed by Operators that have already been created in the project, in a self-service manner, just like a cloud service. If you want to enable additional users with this ability, project administrators can add the role using the following command:

   $ oc policy add-role-to-user edit <user> -n <target_project>

1. Download the Linux x86_64 or Linux amd64 Helm binary and add it to your path:

   # curl -L https://mirror.openshift.com/pub/openshift-v4/clients/helm/latest/helm-linux-amd64 -o /usr/local/bin/helm

2. Make the binary file executable:

   # chmod +x /usr/local/bin/helm

3. Check the installed version:

   $ helm version

   Example output

   version.BuildInfo{Version:"v3.0", GitCommit:"b31719aab7963acf4887a1c1e6d5e53378e34d93", GitTreeState:"clean", GoVersion:"go1.13.4"}

1. Download the latest .exe file and put in a directory of your preference.
2. Right click Start and click Control Panel.
3. Select System and Security and then click System.
4. From the menu on the left, select Advanced systems settings and click Environment Variables at the bottom.
5. Select Path from the Variable section and click Edit.
6. Click New and type the path to the folder with the .exe file into the field or click Browse and select the directory, and click OK.

1. Download the latest .exe file and put in a directory of your preference.
2. Click Search and type env or environment.
3. Select Edit environment variables for your account.
4. Select Path from the Variable section and click Edit.
5. Click New and type the path to the directory with the exe file into the field or click Browse and select the directory, and click OK.

1. Download the Helm binary and add it to your path:

   # curl -L https://mirror.openshift.com/pub/openshift-v4/clients/helm/latest/helm-darwin-amd64 -o /usr/local/bin/helm

2. Make the binary file executable:

   # chmod +x /usr/local/bin/helm

3. Check the installed version:

   $ helm version

   Example output

   version.BuildInfo{Version:"v3.0", GitCommit:"b31719aab7963acf4887a1c1e6d5e53378e34d93", GitTreeState:"clean", GoVersion:"go1.13.4"}

1. In the Developer perspective, navigate to the +Add view and select a project. Then click Helm Chart option to see all the Helm Charts in the Developer Catalog.
2. Select a chart and read the description, README, and other details about the chart.

3. Click Create.

   Figure 5.1. Helm charts in developer catalog

   

4. In the Create Helm Release page:

   1. Enter a unique name for the release in the Release Name field.
   2. Select the required chart version from the Chart Version drop-down list.

   3. Configure your Helm chart by using the Form View or the YAML View.

      Note

      Where available, you can switch between the YAML View and Form View. The data is persisted when switching between the views.

   4. Click Create to create a Helm release. The web console displays the new release in the Topology view.

      If a Helm chart has release notes, the web console displays them.

      If a Helm chart creates workloads, the web console displays them on the Topology or Helm release details page. The workloads are DaemonSet, CronJob, Pod, Deployment, and DeploymentConfig.

   5. View the newly created Helm release in the Helm Releases page.

Procedure

1. Create a new project:

   $ oc new-project nodejs-ex-k

2. Download an example Node.js chart that contains Red Hat OpenShift Service on AWS objects:

   $ git clone https://github.com/redhat-developer/redhat-helm-charts

3. Go to the directory with the sample chart:

   $ cd redhat-helm-charts/alpha/nodejs-ex-k/

4. Edit the Chart.yaml file and add a description of your chart:

   apiVersion: v2 1
   name: nodejs-ex-k 2
   description: A Helm chart for OpenShift 3
   icon: https://static.redhat.com/libs/redhat/brand-assets/latest/corp/logo.svg 4
   version: 0.2.1 5

   1

   The chart API version. It should be v2 for Helm charts that require at least Helm 3.

   2

   The name of your chart.

   3

   The description of your chart.

   4

   The URL to an image to be used as an icon.

   5

   The Version of your chart as per the Semantic Versioning (SemVer) 2.0.0 Specification.

5. Verify that the chart is formatted properly:

   $ helm lint

   Example output

   [INFO] Chart.yaml: icon is recommended
   
   1 chart(s) linted, 0 chart(s) failed

6. Navigate to the previous directory level:

   $ cd ..

7. Install the chart:

   $ helm install nodejs-chart nodejs-ex-k

8. Verify that the chart has installed successfully:

   $ helm list

   Example output

   NAME NAMESPACE REVISION UPDATED STATUS CHART APP VERSION
   nodejs-chart nodejs-ex-k 1 2019-12-05 15:06:51.379134163 -0500 EST deployed nodejs-0.1.0  1.16.0

Procedure

1. In the Developer perspective, navigate to the +Add view and select a project.
2. From the Developer Catalog tile, select the Helm Chart option to see all the Helm charts in the Developer Catalog.

3. Use the filters to the left of the list of Helm charts to filter the required charts:

   • Use the Chart Repositories filter to filter charts provided by Red Hat Certification Charts or OpenShift Helm Charts.
   • Use the Source filter to filter charts sourced from Partners, Community, or Red Hat. Certified charts are indicated with the ( ) icon.

Procedure

1. In the Topology view, select the Helm release to see the side panel.
2. Click Actions → Upgrade Helm Release.
3. In the Upgrade Helm Release page, select the Chart Version you want to upgrade to, and then click Upgrade to create another Helm release. The Helm Releases page displays the two revisions.

1. In the Developer perspective, navigate to the Helm view to see the Helm Releases in the namespace.
2. Click the Options menu adjoining the listed release, and select Rollback.
3. In the Rollback Helm Release page, select the Revision you want to rollback to and click Rollback.
4. In the Helm Releases page, click on the chart to see the details and resources for that release.

5. Go to the Revision History tab to see all the revisions for the chart.

   Figure 5.2. Helm revision history

   
6. If required, you can further use the Options menu adjoining a particular revision and select the revision to rollback to.

Procedure

1. In the Topology view, right-click the Helm release and select Delete Helm Release.
2. In the confirmation prompt, enter the name of the chart and click Delete.

Procedure

1. Create a new TLS secret from a private key and a public certificate, where fullchain.pem and privkey.pem are your public or private wildcard certificates.

   Example

   $ oc create secret tls <name>-tls --cert=fullchain.pem --key=privkey.pem -n <my_project>

2. Create a new CustomDomain custom resource (CR):

   Example <company_name>-custom-domain.yaml

   apiVersion: managed.openshift.io/v1alpha1
   kind: CustomDomain
   metadata:
     name: <company_name>
   spec:
     domain: apps.<company_name>.io 1
     scope: External
     loadBalancerType: Classic 2
     certificate:
       name: <name>-tls 3
       namespace: <my_project>
     routeSelector: 4
       matchLabels:
        route: acme
     namespaceSelector: 5
       matchLabels:
        type: sharded

   1

   The custom domain.

   2

   The type of load balancer for your custom domain. This type can be the default classic or NLB if you use a network load balancer.

   3

   The secret created in the previous step.

   4

   Optional: Filters the set of routes serviced by the CustomDomain ingress. If no value is provided, the default is no filtering.

   5

   Optional: Filters the set of namespaces serviced by the CustomDomain ingress. If no value is provided, the default is no filtering.

3. Apply the CR:

   Example

   $ oc apply -f <company_name>-custom-domain.yaml

4. Get the status of your newly created CR:

   $ oc get customdomains

   Example output

   NAME               ENDPOINT                                                    DOMAIN                       STATUS
   <company_name>     xxrywp.<company_name>.cluster-01.opln.s1.openshiftapps.com  *.apps.<company_name>.io     Ready

5. Using the endpoint value, add a new wildcard CNAME recordset to your managed DNS provider, such as Route53.

   Example

   *.apps.<company_name>.io -> xxrywp.<company_name>.cluster-01.opln.s1.openshiftapps.com

6. Create a new application and expose it:

   Example

   $ oc new-app --docker-image=docker.io/openshift/hello-openshift -n my-project

   $ oc create route <route_name> --service=hello-openshift hello-openshift-tls --hostname hello-openshift-tls-my-project.apps.<company_name>.io -n my-project

   $ oc get route -n my-project

   $ curl https://hello-openshift-tls-my-project.apps.<company_name>.io
   Hello OpenShift!

Procedure

1. Create new secret

   $ oc create secret tls <secret-new> --cert=fullchain.pem --key=privkey.pem -n <my_project>

2. Patch CustomDomain CR

   $ oc patch customdomain <company_name> --type='merge' -p '{"spec":{"certificate":{"name":"<secret-new>"}}}'

3. Delete old secret

   $ oc delete secret <secret-old> -n <my_project>

1. The elements of a ReplicationController definition.
2. Triggers for creating a new deployment automatically.
3. The strategy for transitioning between deployments.
4. Lifecycle hooks.

1. Executes any pre lifecycle hook.
2. Scales up the new replication controller based on the surge count.
3. Scales down the old replication controller based on the max unavailable count.
4. Repeats this scaling until the new replication controller has reached the desired replica count and the old replication controller has been scaled to zero.
5. Executes any post lifecycle hook.

1. Executes any pre lifecycle hook.
2. Scales down the previous deployment to zero.
3. Executes any mid lifecycle hook.
4. Scales up the new deployment.
5. Executes any post lifecycle hook.

Procedure

1. Define the quota in a file.

2. Use the file to create the quota and apply it to a project:

   $ oc create -f <file> [-n <project_name>]

   For example:

   $ oc create -f core-object-counts.yaml -n demoproject

Procedure

1. Get the list of quotas defined in the project. For example, for a project called demoproject:

   $ oc get quota -n demoproject

   Example output

   NAME                           AGE    REQUEST                                                                                                      LIMIT
   besteffort                     4s     pods: 1/2
   compute-resources-time-bound   10m    pods: 0/2                                                                                                    limits.cpu: 0/1, limits.memory: 0/1Gi
   core-object-counts             109s   configmaps: 2/10, persistentvolumeclaims: 1/4, replicationcontrollers: 1/20, secrets: 9/10, services: 2/10

2. Describe the quota you are interested in, for example the core-object-counts quota:

   $ oc describe quota core-object-counts -n demoproject

   Example output

   Name:			core-object-counts
   Namespace:		demoproject
   Resource		Used	Hard
   --------		----	----
   configmaps		3	10
   persistentvolumeclaims	0	4
   replicationcontrollers	3	20
   secrets			9	10
   services		2	10

Procedure

1. Add a resource quota definition to a project request template:

   • If a project request template does not exist in a cluster:

     1. Create a bootstrap project template and output it to a file called template.yaml:

        $ oc adm create-bootstrap-project-template -o yaml > template.yaml

     2. Add a resource quota definition to template.yaml. The following example defines a resource quota named 'storage-consumption'. The definition must be added before the parameters: section in the template:

        - apiVersion: v1
          kind: ResourceQuota
          metadata:
            name: storage-consumption
            namespace: ${PROJECT_NAME}
          spec:
            hard:
              persistentvolumeclaims: "10" 1
              requests.storage: "50Gi" 2
              gold.storageclass.storage.k8s.io/requests.storage: "10Gi" 3
              silver.storageclass.storage.k8s.io/requests.storage: "20Gi" 4
              silver.storageclass.storage.k8s.io/persistentvolumeclaims: "5" 5
              bronze.storageclass.storage.k8s.io/requests.storage: "0" 6
              bronze.storageclass.storage.k8s.io/persistentvolumeclaims: "0" 7

        1

        The total number of persistent volume claims in a project.

        2

        Across all persistent volume claims in a project, the sum of storage requested cannot exceed this value.

        3

        Across all persistent volume claims in a project, the sum of storage requested in the gold storage class cannot exceed this value.

        4

        Across all persistent volume claims in a project, the sum of storage requested in the silver storage class cannot exceed this value.

        5

        Across all persistent volume claims in a project, the total number of claims in the silver storage class cannot exceed this value.

        6

        Across all persistent volume claims in a project, the sum of storage requested in the bronze storage class cannot exceed this value. When this value is set to 0, the bronze storage class cannot request storage.

        7

        Across all persistent volume claims in a project, the sum of storage requested in the bronze storage class cannot exceed this value. When this value is set to 0, the bronze storage class cannot create claims.

     3. Create a project request template from the modified template.yaml file in the openshift-config namespace:

        $ oc create -f template.yaml -n openshift-config

        Note

        To include the configuration as a kubectl.kubernetes.io/last-applied-configuration annotation, add the --save-config option to the oc create command.

        By default, the template is called project-request.

   • If a project request template already exists within a cluster:

     Note

     If you declaratively or imperatively manage objects within your cluster by using configuration files, edit the existing project request template through those files instead.

     1. List templates in the openshift-config namespace:

        $ oc get templates -n openshift-config

     2. Edit an existing project request template:

        $ oc edit template <project_request_template> -n openshift-config

     3. Add a resource quota definition, such as the preceding storage-consumption example, into the existing template. The definition must be added before the parameters: section in the template.

2. If you created a project request template, reference it in the cluster’s project configuration resource:

   1. Access the project configuration resource for editing:

      • By using the web console:

        1. Navigate to the Administration → Cluster Settings page.
        2. Click Configuration to view all configuration resources.
        3. Find the entry for Project and click Edit YAML.

      • By using the CLI:

        1. Edit the project.config.openshift.io/cluster resource:

           $ oc edit project.config.openshift.io/cluster

   2. Update the spec section of the project configuration resource to include the projectRequestTemplate and name parameters. The following example references the default project request template name project-request:

      apiVersion: config.openshift.io/v1
      kind: Project
      metadata:
      #  ...
      spec:
        projectRequestTemplate:
          name: project-request

3. Verify that the resource quota is applied when projects are created:

   1. Create a project:

      $ oc new-project <project_name>

   2. List the project’s resource quotas:

      $ oc get resourcequotas

   3. Describe the resource quota in detail:

      $ oc describe resourcequotas <resource_quota_name>

Procedure

1. To select projects based on annotations, run the following command:

   $ oc create clusterquota for-user \
        --project-annotation-selector openshift.io/requester=<user_name> \
        --hard pods=10 \
        --hard secrets=20

   This creates the following ClusterResourceQuota object:

   apiVersion: quota.openshift.io/v1
   kind: ClusterResourceQuota
   metadata:
     name: for-user
   spec:
     quota: 1
       hard:
         pods: "10"
         secrets: "20"
     selector:
       annotations: 2
         openshift.io/requester: <user_name>
       labels: null 3
   status:
     namespaces: 4
     - namespace: ns-one
       status:
         hard:
           pods: "10"
           secrets: "20"
         used:
           pods: "1"
           secrets: "9"
     total: 5
       hard:
         pods: "10"
         secrets: "20"
       used:
         pods: "1"
         secrets: "9"

   1

   The ResourceQuotaSpec object that will be enforced over the selected projects.

   2

   A simple key-value selector for annotations.

   3

   A label selector that can be used to select projects.

   4

   A per-namespace map that describes current quota usage in each selected project.

   5

   The aggregate usage across all selected projects.

   This multi-project quota document controls all projects requested by <user_name> using the default project request endpoint. You are limited to 10 pods and 20 secrets.

2. Similarly, to select projects based on labels, run this command:

   $  oc create clusterresourcequota for-name \1
       --project-label-selector=name=frontend \2
       --hard=pods=10 --hard=secrets=20

   1

   Both clusterresourcequota and clusterquota are aliases of the same command. for-name is the name of the ClusterResourceQuota object.

   2

   To select projects by label, provide a key-value pair by using the format --project-label-selector=key=value.

   This creates the following ClusterResourceQuota object definition:

   apiVersion: quota.openshift.io/v1
   kind: ClusterResourceQuota
   metadata:
     creationTimestamp: null
     name: for-name
   spec:
     quota:
       hard:
         pods: "10"
         secrets: "20"
     selector:
       annotations: null
       labels:
         matchLabels:
           name: frontend

Procedure

1. To view quotas applied to a project, run:

   $ oc describe AppliedClusterResourceQuota

   Example output

   Name:   for-user
   Namespace:  <none>
   Created:  19 hours ago
   Labels:   <none>
   Annotations:  <none>
   Label Selector: <null>
   AnnotationSelector: map[openshift.io/requester:<user-name>]
   Resource  Used  Hard
   --------  ----  ----
   pods        1     10
   secrets     9     20