merge-multiple-kubeconfig-kubernetes-clusters.py

import os
import yaml

# CURRENT   NAME                                          CLUSTER                 AUTHINFO                NAMESPACE
#           group1-cluster1@kubernetes                   group1-cluster1              group1-cluster1        
#           group1-cluster2@group1-cluster2           group1-cluster2       group1-cluster2       
#           group2-cluster1@group2-cluster1               group2-cluster1         group2-cluster1         
# *         group2-cluster2@group2-cluster2             group2-cluster2        group2-cluster2        


data = yaml.load('''
group1:
  cluster1: 1.1.1.1
  cluster2: 1.0.0.1
group2:
  cluster1: 1.1.1.1
  cluster2: 1.0.0.1
''')

all_env="KUBECONFIG="
first = True

for group in data.keys():
  for name in data[group].keys():
    ip = data[group][name]
    # print(group, name, data[group][name])
    file = f"/tmp/{group}-{name}.conf"
    # cmd = f"scp {ip}:/etc/kubernetes/admin.conf {file}"
    for cmd in [
      f"scp {ip}:/etc/kubernetes/admin.conf {file}",
      f"sed -i 's/kubernetes-admin/{group}-{name}/g' {file}",
      f"sed -i 's/cluster.local/{group}-{name}/g' {file}",
      f"sed -i 's/server: .*/server: https:\/\/{ip}:6443/g' {file}"
    ]:
      print(cmd)
      exit_code = os.system(cmd)
      if exit_code != 0:
        raise Exception(f"exit code {exit_code} for cmd {cmd}")
    
    if first:
      all_env += f"{file}"
      first = False
    else:
      all_env += f":{file}"


print(f"{all_env} kubectl config view --flatten > ~/.kube/config")