fmarchioni/solution.md

## solution.md

      
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              solution.md
            
          
    OpenShift WildFly Demo Deployment

This guide provides step-by-step instructions to deploy a WildFly application on OpenShift using Helm and configure it with environment variables and resource limits.
Prerequisites


OpenShift CLI (oc) installed
Helm installed
Access to an OpenShift cluster

Steps

1. Log in to OpenShift

# Log in as a developer user
oc login -u developer -p developer https://api.ocp4.example.com:6443
2. Create a new OpenShift project

# Create a new OpenShift project called wildfly-demo
oc new-project wildfly-demo
3. Add the WildFly Helm repository and search for available charts

# Add the WildFly Helm chart repository
helm repo add wildfly https://docs.wildfly.org/wildfly-charts/

# Search for available WildFly Helm charts
helm search repo wildfly
4. Install the MicroProfile Config Example application

# Deploy the microprofile-config-app using the WildFly Helm chart
helm install microprofile-config-app wildfly/wildfly -f https://raw.githubusercontent.com/wildfly/wildfly-charts/main/examples/microprofile-config/microprofile-config-app.yaml
5. Monitor the build and deployment process

# Watch the build process
oc get build -w

# Watch the deployment status
oc get deployment microprofile-config-app -w
6. Check application logs

# View logs of the build process
oc logs -f build/microprofile-config-app-1
7. Monitor the running pods and retrieve the application route

# Watch for running pods
oc get pods -w

# Retrieve the application route
oc get route
8. Test the application endpoint

# Perform a test request to the application endpoint
curl -k https://microprofile-config-app-wildfly-demo.apps.ocp4.example.com/config/value
Expected: "Hello from OpenShift"
9. Create a ConfigMap and inject it into the deployment

# Create a ConfigMap with a custom environment variable
oc create configmap democonfig --from-literal=CONFIG_PROP="Hello D280!"

# Set the environment variable from the ConfigMap in the deployment
oc set env --from=configmap/democonfig deployment/microprofile-config-app
10. Monitor pod restarts and verify changes

# Check the status of the pods
oc get pods

# Watch for new pod creation after environment update
oc get pods -w
11. Verify the updated configuration in the application

# Perform a test request to verify the new configuration value
curl -k https://microprofile-config-app-wildfly-demo.apps.ocp4.example.com/config/value
Expected: "Hello D280!"
12. Set resource limits for the deployment

# Set memory limit for the deployment
oc set resources deployment microprofile-config-app --limits=memory=512Mi
13. Scale the deployment

# Scale up the deployment to 4 replicas
oc scale deployment microprofile-config-app --replicas 4
14. Log in as an administrator and monitor cluster resource usage

# Log in as an admin user
oc login -u admin -p redhatocp

# Check resource usage of OpenShift nodes
oc adm top nodes
15. Scale down the deployment

# Scale down the deployment to 0 replicas
oc scale deployment microprofile-config-app --replicas 0
16. Deploy the MicroProfile Health application

# Deploy the microprofile-health example using Helm
helm install microprofile-health wildfly/wildfly -f https://raw.githubusercontent.com/wildfly/quickstart/refs/heads/main/microprofile-health/charts/helm.yaml
17. Create an additional service for the Health Service on Port 9990

oc expose deployment microprofile-health --port=9990 --target-port=9990 --name=microprofile-health-service
18. Expose and test the additional service

oc expose service microprofile-health-service 
oc get route
curl microprofile-health-service-wildfly-demo.apps.ocp4.example.com/health
Expected:
"status":"UP","checks":[{"name":"deployments-status","status":"UP","data":{"microprofile-health.war":"OK"}},{"name":"suspend-state","status":"UP","data":{"value":"RUNNING"}},{"name":"server-state","status":"UP","data":{"value":"running"}},{"name":"boot-errors","status":"UP"},{"name":"Simple health check","status":"UP"},{"name":"Health check with data","status":"UP","data":{"foo":"fooValue","bar":"barValue"}},{"name":"Database connection health check","status":"UP"},{"name":"started-deployment.microprofile-health.war","status":"UP"}]}[