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Health Check - Spring Boot Booster

Important
While you can run and interact with this booster on our local host, you cannot take advantage of using the health check functionality with this booster without using OpenShift. For more details on using this booster with a single-node OpenShift cluster, CI/CD deployments, as well as the rest of the runtime, see the Spring Boot Runtime Guide.

Run this Booster Locally

To run this booster on your local host:

$ git clone [email protected]:${loggedUser}/favourite

$ cd favourite

$ mvn spring-boot:run

Interact with this Booster Locally

To interact with your booster while its running, use the form at http://localhost:8080 or the curl command:

$ curl http://localhost:8080/api/greeting
{"content":"Hello, World!"}

$ curl http://localhost:8080/api/greeting?name=Sarah
{"content":"Hello, Sarah!"}

Run this Booster on a Single-node OpenShift Cluster

If you have a single-node OpenShift cluster, such as Minishift or the Red Hat Container Development Kit, installed and running, you can also deploy your booster there. A single-node OpenShift cluster provides you with access to a cloud environment that is similar to a production environment.

To deploy your booster to a running single-node OpenShift cluster:

  1. Log in and create your project.

    $ oc login -u developer -p developer
    
    $ oc new-project MY_PROJECT_NAME
    
    $ mvn clean fabric8:deploy -Popenshift -DskipTests

Interact with this Booster on a Single-node OpenShift Cluster

To interact with your booster while it’s running on a Single-node Openshift Cluster, you first need to obtain it’s URL:

$ oc get route booster-health-check-spr -o jsonpath={$.spec.host}

booster-health-check-spr-MY_PROJECT_NAME.LOCAL_OPENSHIFT_HOSTNAME

You can use the form at your application’s url or you can use the curl command:

$ curl http://booster-health-check-spr-MY_PROJECT_NAME.LOCAL_OPENSHIFT_HOSTNAME/api/greeting
{"content":"Hello World from a ConfigMap!"}

$ curl http://booster-health-check-spr-MY_PROJECT_NAME.LOCAL_OPENSHIFT_HOSTNAME/api/greeting?name=Sarah
{"content":"Hello Sarah from a ConfigMap!"}

$ curl http://booster-health-check-spr-MY_PROJECT_NAME.LOCAL_OPENSHIFT_HOSTNAME/api/killme

$ oc get pods -w
NAME                           READY     STATUS    RESTARTS   AGE
booster-health-check-spr-1-26iy7   1/1       Running   5          18m

When READY changes to 0/1, if you re-execute a curl command to api/greeting or attempt to access the application’s URL, it will be unavailable. When READY changes back to 1/1, curl commands and the application URL will be available again.

CI/CD Deployment

As part of the process of creating this booster, launch.openshift.io set up a project with a CI/CD deployment of this booster. You can see the status of this deployment in your Single-node OpenShift Cluster Web Console. You can also learn more about this booster and rest of the Spring Boot runtime in the Spring Boot Runtime Guide.

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