Chapter 2. Creating an application by using the GitOps CLI

Procedure

1. Get the admin account password for the Argo CD server:

   $ ADMIN_PASSWD=$(oc get secret openshift-gitops-cluster -n openshift-gitops -o jsonpath='{.data.admin\.password}' | base64 -d)

2. Get the Argo CD server URL:

   $ SERVER_URL=$(oc get routes openshift-gitops-server -n openshift-gitops -o jsonpath='{.status.ingress[0].host}')

3. Log in to the Argo CD server by using the admin account password and enclosing it in single quotes:

   Important

   Enclosing the password in single quotes ensures that special characters, such as $, are not misinterpreted by the shell. Always use single quotes to enclose the literal value of the password.

   $ argocd login --username admin --password ${ADMIN_PASSWD} ${SERVER_URL}

   Example

   $ argocd login --username admin --password '<password>' openshift-gitops.openshift-gitops.apps-crc.testing

4. Verify that you are able to run argocd commands in the default mode by listing all applications:

   $ argocd app list

   If the configuration is correct, then existing applications will be listed with the following header:

   Sample output

   NAME CLUSTER NAMESPACE  PROJECT  STATUS  HEALTH   SYNCPOLICY  CONDITIONS  REPO PATH TARGET

5. Create an application in the default mode:

   $ argocd app create app-spring-petclinic \
       --repo https://github.com/redhat-developer/openshift-gitops-getting-started.git \
       --path app \
       --revision main \
       --dest-server  https://kubernetes.default.svc \
       --dest-namespace spring-petclinic \
       --directory-recurse \
       --sync-policy automated \
       --self-heal \
       --sync-option Prune=true \
       --sync-option CreateNamespace=true

6. Label the spring-petclinic destination namespace to be managed by the openshif-gitops Argo CD instance:

   $ oc label ns spring-petclinic "argocd.argoproj.io/managed-by=openshift-gitops"

7. List the available applications to confirm that the application is created successfully and repeat the command until the application has the Healthy and Synced statuses:

   $ argocd app list

Procedure

1. Log in to the OpenShift Container Platform cluster by using the oc CLI tool:

   $ oc login -u <username> -p <password> <server_url>

   Example

   $ oc login -u kubeadmin -p '<password>' https://api.crc.testing:6443

2. Check whether the context is set correctly in the kubeconfig file:

   $ oc config current-context

3. Set the default namespace of the current context to openshift-gitops:

   $ oc config set-context --current --namespace openshift-gitops

4. Set the following environment variable to override the Argo CD component names:

   $ export ARGOCD_REPO_SERVER_NAME=openshift-gitops-repo-server

5. Verify that you are able to run argocd commands in core mode by listing all applications:

   $ argocd app list --core

   If the configuration is correct, then existing applications will be listed with the following header:

   Sample output

   NAME CLUSTER NAMESPACE  PROJECT  STATUS  HEALTH   SYNCPOLICY  CONDITIONS  REPO PATH TARGET

6. Create an application in core mode:

   $ argocd app create app-spring-petclinic --core \
       --repo https://github.com/redhat-developer/openshift-gitops-getting-started.git \
       --path app \
       --revision main \
       --dest-server  https://kubernetes.default.svc \
       --dest-namespace spring-petclinic \
       --directory-recurse \
       --sync-policy automated \
       --self-heal \
       --sync-option Prune=true \
       --sync-option CreateNamespace=true

7. Label the spring-petclinic destination namespace to be managed by the openshif-gitops Argo CD instance:

   $ oc label ns spring-petclinic "argocd.argoproj.io/managed-by=openshift-gitops"

8. List the available applications to confirm that the application is created successfully and repeat the command until the application has the Healthy and Synced statuses:

   $ argocd app list --core