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Local-K8S-Cluster

Kubernetes Vagrant Ansible Ruby Shell Script

This CLI tool makes it easy to set up and manage your own Kubernetes cluster on your local machine. With local-k8s-cluster, just define your cluster in a simple YAML file (k8s-cluster.yml) and run a single command to get it up and running.

Project Overview

Features

  • Simple Configuration: Define nodes, memory, CPUs, and monitoring tools effortlessly in a YAML file.
  • Efficient Deployment: Execute local-k8s-cluster deploy to effortlessly create virtual machines and configure Kubernetes with Ansible.
  • Command-Line Convenience: Manage your local cluster with ease using commands like stop, clear, and configure-kubectl.

Screenshots

Help command output

Getting Started

This section will guide you through the process to install and use the tool.

Prerequisites

You will need:

installed in your system.

Installation

To install the tool, it is recommended to clone the project from GitHub into the /opt/local-k8s-cluster directory:

sudo git clone https://github.com/joseandrestrujillo/local-k8s-cluster.git /opt/local-k8s-cluster

Once the project is cloned, you must create a symbolic link to the local-k8s-cluster script so that it can be executed from anywhere on the system:

sudo ln -s /opt/local-k8s-cluster/local-k8s-cluster /usr/local/bin/local-k8s-cluster

Usage

The tool provides the following commands:

  • deploy: Deploys the Kubernetes cluster.
  • configure-kubectl: Configures the .kube/config file to point to the local cluster.
  • stop: Stops the Kubernetes cluster.
  • clear: Deletes the Kubernetes cluster.

Deploy

To deploy the cluster, you must run the following command

local-k8s-cluster deploy

This command will create two virtual machines with Vagrant and deploy the Kubernetes cluster with Ansible. The virtual machines will be created in the /opt/local-k8s-cluster directory with the names master and worker.

The k8s-cluster.yml file specifies the cluster configuration. The format of this file is as follows:

---
monitoring_tools: true
nodes:
  - name: master
    master: true
    memory: 2048
    cpus: 2
  - name: worker
    master: false
    memory: 2048
    cpus: 2

The monitoring_tools option specifies whether to install monitoring tools in the cluster.

The nodes section specifies the nodes in the cluster. Each node has the following attributes:

  • name: The name of the node.
  • master: Indicates whether the node is a master node.
  • memory: The amount of memory allocated to the node.
  • cpus: The number of CPUs allocated to the node.

Configure kubectl

To configure the .kube/config file to point to the local cluster, you must run the following command:

local-k8s-cluster configure-kubectl

This command will copy the kubeconfig file from the local cluster to the ~/.kube directory.

Stop

To stop the cluster, you must run the following command:

local-k8s-cluster stop

This command will stop the virtual machines that make up the cluster.

Delete

To delete the cluster, you must run the following command:

local-k8s-cluster clear

This command will delete the virtual machines that make up the cluster and the configuration files.

Monitoring tools

To run the prometheus + grafana monitoring tool, you can run the following:

local-k8s-cluster expose-grafana

This command will open a local port on port 30023 that will connect to the weave scope monitoring server. You can access the grafana server at the address http://localhost:30023.

Contributing

As an open-source project, we welcome contributions of all forms.

If you have an idea or find a bug, please open an issue so we can discuss it. If you wish to contribute code, please open a pull request.

Acknowledgments

This project is built upon the foundation laid by the fantastic work in the Ansible playbooks repository, which is licensed under the GNU General Public License v3.0. I extend my sincere gratitude to the original authors for their valuable contributions.

In the process of developing local-k8s-cluster, I've built upon and modified the Ansible playbooks to accommodate the specific requirements of this tool. Notably, I have tailored the code to support the deployment of Kubernetes clusters with more than two nodes.

Original Ansible Playbooks Repository: kubeadm-cluster.

License

This tool is based on this repository.

Licence