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CI CD pipeline for a go web application

Run & Test application locally

  • Clone repo
git clone https://github.com/AryanSharma9917/GO-CI-CD.git
  • Build the GO application
cd go-ci-cd
go build .
  • Run the Tests
go test -v
  • Running the application
./go-ci-cd
  • Access application
curl localhost:8080/greet
curl localhost:8080/hello/Aryan

Note: All the yml files are present inside /ymls directory.

Pipeline (CI)

fig-1

  • Clone this repo
git clone https://github.com/AryanSharma9917/go-ci-cd.git
  • Login to Openshift cluster:
oc login --token=<TOKEN> --server=<SERVER_URL>
  • Create new project/namespace in Openshift cluster
oc new-project go-app-pipeline
  • Install Red Hat OpenShift Pipelines from Operators --> Operator Hub
  • Run the following command to see the pipeline service account $
oc get serviceaccount pipeline
  • Create tasks
oc apply -f ymls/tasks
  • Create pipeline
oc apply -f ymls/pipeline
  • Check the created pipeline and tasks
oc get pipeline,task
  • Run the pipeline
tkn pipeline start go-pipeline -w name=workspace-test,volumeClaimTemplateFile=https://raw.githubusercontent.com/AryanSharma9917/go-ci-cd/main/ymls/pvc/pvc.yml --use-param-defaults
  • Check the pipelinerun
tkn pipelinerun ls
  • Check the log of the pipelinerun
tkn pipelinerun logs <pipelinerun_name>
  • Check the imagestream created by the latest pipelinerun
oc get is

CD (ArgoCD)

oc apply -f ymls/argocd/app.yml -n openshift-gitops
  • ArgoCD Application

fig-2

  • Granting permissions to a specific serviceaccount through role assignment to deploy the go application in namespace go-app-pipeline
oc adm policy add-role-to-user admin system:serviceaccount:openshift-gitops:openshift-gitops-argocd-application-controller -n go-app-pipeline
  • Check the status of the deployed argocd application
oc get application -n openshift-gitops

Access the deployed application in Openshift

  • Get all the resources in the namespace go-app-pipeline
$ oc get all -n go-app-pipeline

NAME                                                                 READY   STATUS      RESTARTS   AGE
pod/go-pipeline-run-kdtgn-build-and-push-to-openshift-registry-pod   0/1     Completed   0          31m
pod/go-pipeline-run-kdtgn-git-clone-pod                              0/1     Completed   0          32m
pod/go-pipeline-run-kdtgn-go-test-pod                                0/1     Completed   0          32m
pod/go-web-app-deployment-98bb59849-8prpm                            1/1     Running     0          35m

NAME                     TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE
service/go-web-app-svc   ClusterIP   172.30.130.60   <none>        8080/TCP   39m

NAME                                    READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/go-web-app-deployment   1/1     1            1           39m

NAME                                               DESIRED   CURRENT   READY   AGE
replicaset.apps/go-web-app-deployment-58c48f68db   0         0         0       39m
replicaset.apps/go-web-app-deployment-98bb59849    1         1         1       35m

NAME                                        IMAGE REPOSITORY                                                                                                  TAGS                                          UPDATED
imagestream.image.openshift.io/go-web-app   default-route-openshift-image-registry.apps.cndsno3.cee.ral3.lab.eng.rdu2.redhat.com/go-app-pipeline/go-web-app   latest,3f93d31c-dfdd-4ca5-9a8e-3a9a86eb9de4   28 minutes ago

NAME                                        HOST/PORT                                                                        PATH     SERVICES         PORT   TERMINATION   WILDCARD
route.route.openshift.io/go-web-app-route   go-web-app-route-go-app-pipeline.apps.cndsno3.cee.ral3.lab.eng.rdu2.redhat.com   /greet   go-web-app-svc   8080                 None
  • Access the application using curl
$ curl go-web-app-route-go-app-pipeline.apps.cndsno3.cee.ral3.lab.eng.rdu2.redhat.com/greet 
        
Hello world!