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===== SoCS Kubernetes Cluster =====

**Location:** [[https://kubefarm.socs.uoguelph.ca]]

**Who Has Access:** Faculty or students with faculty, on request

The School of Computer Science has a Kubernetes cluster. It is running the RKE2 Kubernetes distribution, and has [[https://rancher.com/docs/|Rancher]] on top as a management layer and web based graphic interface.

**Important Note:** Due to the design of Kubernetes, it is unaware of Rancher running above it. This means that some things MUST be done through Rancher, while others can be done directly using the Kubernetes command kubectl. This guide will note when something must be done directly via Rancher.

===== How To Interact With Kubernetes ====

You can interact with Kubernetes in the following ways:

=== Directly Through the Web Interface ===

Interacting with Rancher is as simple as logging into Kubefarm and using the interface. To run kubectl commands, from [[ https://kubefarm.socs.uoguelph.ca/c/local/monitoring | cluster manager ]] click on the Launch Kubectl button to bring up a Kubernetes shell.

=== Install Rancher Command Line Interface ===

Follow the guide from the [[ https://rancher.com/docs/rancher/v2.5/en/cli/ | official Rancher documentation]]. This is the simplest method to connect to Rancher via a command line. To run kubectl commands, preface the command with rancher, ie <code>rancher kubectl get pod</code>

=== Install Kubectl on Your Machine ===

If you prefer to interact with Kubernetes directly, the kubectl command can be installed directly on your local machine.

Follow the instructions for your Operating system from the [[ https://kubernetes.io/docs/tasks/tools/ | official Kubernetes documentation]].

From the [[ https://kubefarm.socs.uoguelph.ca/c/local/monitoring | Cluster Manager Menu ]], choose Kubeconfig file in the top right of the screen to download this file. You can then copy it to your .kube folder which was created in the installation process.

To access from off campus, ensure you are running the campus VPN and choose Full Tunnel mode.

==== Gitlab Agent Integration ====

Integrate your Gitlab project with the Kubernetes cluster to automatically deploy and update your project. This Guide assumes you already have a project located in the SoCS Gitlab server, and that you have built the project into a Docker container.

1. You will need to host your Docker container. If the container can be publicly accessible, this can be hosted in Docker Hub. If it must be private, the SoCS Gitlab installation has it's own Docker Container Registry. To access the SoCS Registry, use ''%% docker login registry.uoguelph.ca %%'' and enter your central login/Gitlab credentials. You can then push the container to the registry as usual.

NB: In the future building a Docker container and pushing to the SoCS registry could be done through the CI/CD pipeline, but this is not yet available.

2. 
<code>
  gitops:
    manifest_projects:
    - id: "Your Project ID"
      paths:
      - glob: '/manifests/*.{yaml,yml,json}'
<code>

X. Create two namespaces One for your project, and the other for the gitlab agent. From the [[ https://kubefarm.socs.uoguelph.ca/c/local/projects-namespaces Projects and Namespaces Menu ]] choose Add Namespace. Enter a name, leaving the other settings at their defaults and choose Create. This step MUST be done through Rancher, otherwise you will not have permissions to access the namespace you create.

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