CI CD pipeline for a go web application

Run & Test application locally

• Clone repo

git clone https://github.com/anilabhabaral/ci-cd-go.git

• Build application

cd ci-cd-go
go build .

• Run the Tests

go test -v 

• Run application

./ci-cd-go

• Access application

curl localhost:8080/greet
curl localhost:8080/hello/Anilabha

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

Pipeline (CI)

• Clone this repo

git clone https://github.com/anilabhabaral/ci-cd-go.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/anilabhabaral/ci-cd-go/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)

• To install Openshift Gitops Operator follow this official doc: https://github.com/redhat-developer/gitops-operator/blob/master/docs/OpenShift%20GitOps%20Usage%20Guide.md
• Login to argo-cd console
• Create argocd application

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

• ArgoCD Application

• 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!