2.5. Creating a single-component application with odo

Procedure

1. Log in to an OpenShift Container Platform cluster:

   $ odo login -u developer -p developer

   Copy to Clipboard Toggle word wrap

2. Create a project:

   $ odo project create myproject

   Copy to Clipboard Toggle word wrap

   Example output

    ✓  Project 'myproject' is ready for use
    ✓  New project created and now using project : myproject

   Copy to Clipboard Toggle word wrap

Procedure

1. Create a directory for your components:

   $ mkdir my_components && cd my_components

   Copy to Clipboard Toggle word wrap

2. Download the example Node.js application:

   $ git clone https://github.com/openshift/nodejs-ex

   Copy to Clipboard Toggle word wrap

3. Change the current directory to the directory with your application:

   $ cd <directory_name>

   Copy to Clipboard Toggle word wrap

4. Add a component of the type Node.js to your application:

   $ odo create nodejs

   Copy to Clipboard Toggle word wrap
   注意

   By default, the latest image is used. You can also explicitly specify an image version by using odo create openshift/nodejs:8.

5. Push the initial source code to the component:

   $ odo push

   Copy to Clipboard Toggle word wrap

   Your component is now deployed to OpenShift Container Platform.

6. Create a URL and add an entry in the local configuration file as follows:

   $ odo url create --port 8080

   Copy to Clipboard Toggle word wrap

7. Push the changes. This creates a URL on the cluster.

   $ odo push

   Copy to Clipboard Toggle word wrap

8. List the URLs to check the desired URL for the component.

   $ odo url list

   Copy to Clipboard Toggle word wrap

9. View your deployed application using the generated URL.

   $ curl <url>

   Copy to Clipboard Toggle word wrap

1. Edit one of the layout files within the Node.js directory with your preferred text editor.

2. Update your component:

   $ odo push

   Copy to Clipboard Toggle word wrap
3. Refresh your application in the browser to see the changes.

Procedure

1. Add the storage to your component:

   $ odo storage create <storage_name> --path=<path_to_the_directory> --size=<size>

   Copy to Clipboard Toggle word wrap

2. Push the storage to the cluster:

   $ odo push

   Copy to Clipboard Toggle word wrap

3. Verify that the storage is now attached to your component by listing all storage in the component:

   $ odo storage list

   Copy to Clipboard Toggle word wrap

   The component 'nodejs' has the following storage attached:
   NAME           SIZE     PATH      STATE
   mystorage      1Gi      /data     Pushed

   Copy to Clipboard Toggle word wrap

4. Delete the storage from your component:

   $ odo storage delete <storage_name>

   Copy to Clipboard Toggle word wrap

5. List all storage to verify that the storage state is Locally Deleted:

   $ odo storage list

   Copy to Clipboard Toggle word wrap

   The component 'nodejs' has the following storage attached:
   NAME           SIZE     PATH      STATE
   mystorage      1Gi      /data     Locally Deleted

   Copy to Clipboard Toggle word wrap

6. Push the changes to the cluster:

   $ odo push

   Copy to Clipboard Toggle word wrap

Procedure

1. Import the image into OpenShift Container Platform:

   $ oc import-image openjdk18 \
   --from=registry.access.redhat.com/redhat-openjdk-18/openjdk18-openshift \
   --confirm

   Copy to Clipboard Toggle word wrap

2. Tag the image to make it accessible to odo:

   $ oc annotate istag/openjdk18:latest tags=builder

   Copy to Clipboard Toggle word wrap

3. Deploy the image with odo:

   $ odo create openjdk18 --git \
   https://github.com/openshift-evangelists/Wild-West-Backend

   Copy to Clipboard Toggle word wrap

Procedure

1. List the applications in the current project:

   $ odo app list

   Copy to Clipboard Toggle word wrap

   Example output

       The project '<project_name>' has the following applications:
       NAME
       app

   Copy to Clipboard Toggle word wrap

2. List the components associated with the applications. These components will be deleted with the application:

   $ odo component list

   Copy to Clipboard Toggle word wrap

   Example output

       APP     NAME                      TYPE       SOURCE        STATE
       app     nodejs-nodejs-ex-elyf     nodejs     file://./     Pushed

   Copy to Clipboard Toggle word wrap

3. Delete the application:

   $ odo app delete <application_name>

   Copy to Clipboard Toggle word wrap

   Example output

       ? Are you sure you want to delete the application: <application_name> from project: <project_name>

   Copy to Clipboard Toggle word wrap

4. Confirm the deletion with Y. You can suppress the confirmation prompt using the -f flag.