rhoso-gitops

An implementation of Red Hat GitOps (GitOps, ArgoCD) for managing the deployment of Red Hat OpenStack Services on OpenShift (RHOSO).

WARNING: Contents of this repository are a work in progress and not yet ready for usage in a production environment. The organization or contents of this repository may change drastically at any time.

Repository Layout

• applications/
  • contains the base GitOps Operator (ArgoCD) Application manifests for ArgoCD to manage push-install from the hub cluster to the managed cluster
• base/
  • contains base deployment knowledge not (yet) contained in the validated architectures repository in support of OpenStack deployments with RHOSO
• orchestration/ (deprecated)
  • contains the configuration to deploy for OpenShift GitOps (ArgoCD) for cluster-scoped management on both the hub cluster and managed cluster

Deployment

Manifests are managed with kustomize (https://kustomize.io/) and can be applied directly with oc apply -k <directory>.

Expected order of operations is:

• (optional) Deploy Red Hat Advanced Cluster Manager (RHACM) and configure it so deployment of OpenShift clusters is possible (the hub cluster).
• Deploy ArgoCD to the hub cluster or unmanaged cluster.
  • Use the base/gitops/ directory to deploy Red Hat GitOps and the initial ArgoCD deployment.
• Create the base Applications from applications/ to the hub or unmanaged cluster.
• Create your environments in a private repository for deployment.
• Deploy environments/.

Bootstrap Red Hat GitOps

You must first install Red Hat GitOps (GitOps) to provide the automation system for deploying RHOSO. Installation of GitOps can be done on a hub cluster or an unmanaged cluster. If installed on the hub cluster, you can use a GitOps Application to deploy GitOps on the managed cluster. If you are not using a hub cluster, then installation of GitOps on the unmanaged cluster must done first.

Prerequisites

• You have installed Ansible on the workstation.
• You have installed the Ansible collection kubernetes.core.k8s.
• You have installed Kustomize on the workstation.
• You have logged into the OpenShift cluster as the kubeadmin user you want GitOps to be deployed to.

Procedure

Use the deployment.playbook script to automate the installation of Red Hat GitOps with Ansible and Kustomize.

• Login to the OpenShift cluster as the kubeadmin user from the workstation.

• Install the Red Hat GitOps Operator and deploy an ArgoCD instance with the deployment.playbook script:

  $ ./base/gitops/deployment.playbook

  Alternatively, deploy Red Hat GitOps and ArgoCD with Kustomize directly in stages.

• Login to the OpenShift cluster as the kubeadmin user from the workstation.

• Install the Red Hat GitOps Operator:

  $ oc create --save-config -k base/gitops/subscribe

• Validate the Subscription has been completed. The subscription status should return:

  $ oc get subscription.operators.coreos.com/openshift-gitops-operator \
    --namespace openshift-gitops-operator -ojsonpath='{.status.state}'

• When the value returned is AtLastKnown, then continue by deploying and ArgoCD instance.

• Create the ArgoCD instance:

  $ oc create --save-config -k base/gitops/enable

Set up Red Hat Advanced Cluster Management for GitOps

When using Red Hat Advanced Cluster Management (RHACM) to support GitOps Applications for managed clusters, we will configure the hub cluster in preparation for using GitOps to support managed cluster configuration.

If you are using GitOps on an unmanaged cluster without RHACM, then this will be unnecessary.

Prerequisites

• You have installed and setup RHACM (hub cluster) for your hardware environment that will host the managed OpenShift deployment.
• You are logged into the hub cluster as the kubeadmin user.
• You have installed Red Hat GitOps.

Procedure

• Setup RHACM for RHOSO cluster deployments and placements with GitOps:

  oc apply -k base/advanced-cluster-managment/

• Add your cluster and place it in the rhoso ClusterSet

Accessing the user interface for OpenShift GitOps

You can view progress and management of the Applications by looking up the host address with oc.

Procedure

• Look up the host address of the OpenShift GitOps user interface:

  $ oc get route/openshift-gitops-server -nopenshift-gitops -ojsonpath='{.spec.host}'

Deploy Prerequisites

Deploy the prerequisites for deployment of a RHOSO environment by creating the openstack-prerequisites GitOps Application.

Procedure

• Create the openstack-prerequisites GitOps Application:

  $ oc create --save-config -k applications/base/prerequisites