Kubernetes Multiple Config Merge

Table of Contents

• About
• Getting Started
• Usage
• Result

About

This playbook merges all the config files that you use for switch between kubernetes clusters.

Getting Started

Actually you can do this manually. But if you have 10 cluster you need to run the command below 10 times. What playbook does is read a folder that you save config files, and assign them in to variable. Then it merges them. Simple as that.

    KUBECONFIG=/home/{{ user }}/.kube/config:/home/{{ user }}/{{ item }} kubectl config view --flatten >> /tmp/config
    cp /tmp/config /home/{{ user }}/.kube/config

Prerequisites

You need the following items to run this playbook

• ansible
• kubectl
• kubectx(optional)
• kubernetes config files

Also you should place your config files into yamlfiles directory. Structure should like this.

.
.
├── main.yml
├── README.md
└── yamlfiles
    ├── cluster1.yaml
    ├── cluster2.yaml
    └── cluster3.yaml

1 directory, 5 files

Usage

Place all your config files to a folder. Than simple run the playbook like below.

mkdir yamlfiles
cp *.yaml ./yamlfiles
export CONFIG_DIR=yamlfiles
ansible-playbook main.yml --extra-vars="user=$USER config_path=$CONFIG_DIR"

Result