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Tutorial: Deploying an application

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Deploying the OSToy application with Kubernetes

You can deploy the OSToy application by creating and storing the images for the front-end and back-end microservice containers in an image repository. You can then create Kubernetes deployments to deploy the application.

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Retrieving the login command

  1. If you are not logged in to the CLI, access your cluster with the web console.

  2. Click the dropdown arrow next to your login name in the upper right, and select Copy Login Command.

    CLI login screen

    A new tab opens.

  3. Select your authentication method.

  4. Click Display Token.

  5. Copy the command under Log in with this token.

  6. From your terminal, paste and run the copied command. If the login is successful, you will see the following confirmation message:

    $ oc login --token=<your_token> --server=https://api.osd4-demo.abc1.p1.openshiftapps.com:6443
Logged into "https://api.myrosacluster.abcd.p1.openshiftapps.com:6443" as "rosa-user" using the token provided.

You don't have any projects. You can try to create a new project, by running

oc new-project <project name>

Creating a new project

Using the CLI

  1. Create a new project named ostoy in your cluster by running following command:

    $ oc new-project ostoy
    Example output
    Now using project "ostoy" on server "https://api.myrosacluster.abcd.p1.openshiftapps.com:6443".

  2. Optional: Alternatively, create a unique project name by running the following command:

    $ oc new-project ostoy-$(uuidgen | cut -d - -f 2 | tr '[:upper:]' '[:lower:]')

Using the web console

  1. From the web console, click Home → Projects.

  2. On the Projects page, click create Create Project.

    The project creation screen

Deploying the back-end microservice

The microservice serves internal web requests and returns a JSON object containing the current hostname and a randomly generated color string.

  • Deploy the microservice by running the following command from your terminal:

    $ oc apply -f https://raw.githubusercontent.com/openshift-cs/rosaworkshop/master/rosa-workshop/ostoy/yaml/ostoy-microservice-deployment.yaml
    Example output
    $ oc apply -f https://raw.githubusercontent.com/openshift-cs/rosaworkshop/master/rosa-workshop/ostoy/yaml/ostoy-microservice-deployment.yaml
deployment.apps/ostoy-microservice created
service/ostoy-microservice-svc created

Deploying the front-end service

The front-end deployment uses the Node.js front-end for the application and additional Kubernetes objects.

The ostoy-frontend-deployment.yaml file shows that front-end deployment defines the following features:

  • Persistent volume claim

  • Deployment object

  • Service

  • Route

  • configmaps

  • Secrets

    • Deploy the application front-end and create all of the objects by entering the following command:

      $ oc apply -f https://raw.githubusercontent.com/openshift-cs/rosaworkshop/master/rosa-workshop/ostoy/yaml/ostoy-frontend-deployment.yaml
      Example output
      persistentvolumeclaim/ostoy-pvc created
deployment.apps/ostoy-frontend created
service/ostoy-frontend-svc created
route.route.openshift.io/ostoy-route created
configmap/ostoy-configmap-env created
secret/ostoy-secret-env created
configmap/ostoy-configmap-files created
secret/ostoy-secret created

      You should see all objects created successfully.

Getting the route

You must get the route to access the application.

  • Get the route to your application by running the following command:

    $ oc get route
    Example output
    NAME          HOST/PORT                                                 PATH   SERVICES             PORT    TERMINATION   WILDCARD
ostoy-route   ostoy-route-ostoy.apps.<your-rosa-cluster>.abcd.p1.openshiftapps.com          ostoy-frontend-svc   <all>                 None

Viewing the application

  1. Copy the ostoy-route-ostoy.apps.<your-rosa-cluster>.abcd.p1.openshiftapps.com URL output from the previous step.

  2. Paste the copied URL into your web browser and press enter. You should see the homepage of your application. If the page does not load, make sure you use http and not https.

    OStoy application homepage