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Creating an application by using the GitOps CLI

With Argo CD, you can create your applications on an OpenShift Container Platform cluster by using the GitOps argocd CLI.

Creating an application in the default mode by using the GitOps CLI

You can create applications in the default mode by using the GitOps argocd CLI.

Prerequisites

  • You have installed the Red Hat OpenShift GitOps Operator on your OpenShift Container Platform cluster.

  • You have installed the OpenShift CLI (oc).

  • You have installed the Red Hat OpenShift GitOps argocd CLI.

  • You have logged in to Argo CD instance.

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:

    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

Creating an application in core mode by using the GitOps CLI

You can create applications in core mode by using the GitOps argocd CLI.

Prerequisites

  • You have installed the Red Hat OpenShift GitOps Operator on your OpenShift Container Platform cluster.

  • You have installed the OpenShift CLI (oc).

  • You have installed the Red Hat OpenShift GitOps argocd CLI.

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

Additional resources