Merge multiple kube config files to a single file (manage multiple clusters)

kubemerge.py

import argparse
import yaml
parser = argparse.ArgumentParser()
parser.add_argument('files', metavar='YAMLFILES', type=argparse.FileType('r'), nargs='*')
args = parser.parse_args()

y = {'apiVersion': 'v1', 'kind': 'Config', 'clusters': [],'contexts': [],
	'current-context': 'dev-eu-west-1-aws-bitmex', 'preferences': {}, 'users': []}
for a in args.files:
	f = yaml.load(a, Loader=yaml.Loader)
	y['clusters'].append(f['clusters'][0])
	y['contexts'].append(f['contexts'][0])
	y['users'].append(f['users'][0])
	y['current-context'] = f['contexts'][0]['name']

print(yaml.dump(y, Dumper=yaml.Dumper))

Usage:

% pip3 install pyyaml
% python3 kubemerge.py ~/.kube/dev.config ~/.kube/prod.config ~/.kube/global.config > ~/.kube/config
% kubectx                                                                                                   
dev-eu-west-1
global
prod-eu-west-1