138 lines
3.4 KiB
Python
Executable File
138 lines
3.4 KiB
Python
Executable File
#!/usr/bin/env python3
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import json
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import os
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import sys
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import subprocess
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try:
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import yaml
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# import clipboard
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except:
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print("please install PyYAML first", file=sys.stderr)
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print("sudo pip install PyYAML", file=sys.stderr)
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sys.exit(-1)
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def halt_with_help():
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print("Usage: kube-import <YAML_FILE_PATH>", file=sys.stderr)
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print(" pipe from stdin is not supported because user input is needed", file=sys.stderr)
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print(file=sys.stderr)
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sys.exit(-1)
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if len(sys.argv) < 2:
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halt_with_help()
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# new_config_data = clipboard.paste()
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yaml_path = sys.argv[1]
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with open(yaml_path) as yaml_file:
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new_config_data = yaml_file.read()
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if not new_config_data:
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halt_with_help()
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try:
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new_config = yaml.load(new_config_data, Loader=yaml.Loader)
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except:
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print("illegal yaml format", file=sys.stderr)
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new_clusters = new_config.get('clusters')
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new_contexts = new_config.get('contexts')
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new_users = new_config.get('users')
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if not new_clusters or not new_contexts or not new_users:
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print("configuration yaml must have clusers/contexts/users", file=sys.stderr)
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sys.exit(-1)
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new_context_name = input("Enter context name:")
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if not new_context_name:
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print("aborted!", file=sys.stderr)
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sys.exit(-1)
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new_cluster_name = input("Enter cluster name:")
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if not new_cluster_name:
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print("aborted!", file=sys.stderr)
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sys.exit(-1)
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new_user_name = f'{new_cluster_name}-user'
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# load config file
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cfg_path = os.path.expanduser('~/.kube/config')
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if os.path.exists(cfg_path):
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with open(cfg_path) as f:
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config = yaml.load(f, Loader=yaml.Loader) or {}
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else:
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os.makedirs(os.path.dirname(cfg_path), exist_ok=True)
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config = {}
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config['apiVersion'] = config.get('apiVersion', 'v1')
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config['kind'] = config.get('kind', 'Config')
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config['clusters'] = config.get('clusters', [])
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config['contexts'] = config.get('contexts', [])
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config['users'] =config.get('users', [])
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# merge cluster into config
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def append_or_replace(array, elem, cond):
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index = -1
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for i, c in enumerate(array):
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if cond(c):
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index = i
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break
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if index > -1:
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old_elem = array[index]
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array[index] = elem
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return old_elem
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else:
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array.append(elem)
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def update_context_ref(old, new, ref_key):
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if old and old['name'] != new['name']:
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for ctx in config['contexts']:
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# import ipdb; ipdb.set_trace()
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if ctx['name'] == old['name']:
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ctx['context'][ref_key] = new['name']
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new_context = new_contexts[0]
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new_cluster = new_clusters[0]
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new_user = new_users[0]
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new_context['name'] = new_context_name
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new_context['context']['cluster'] = new_cluster_name
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new_context['context']['user'] = new_user_name
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new_cluster['name'] = new_cluster_name
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new_user['name'] = new_user_name
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old_cluster = append_or_replace(
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config['clusters'],
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new_cluster,
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lambda c: (
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c['name'] == new_cluster_name or c['cluster'] == new_cluster['cluster']
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)
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)
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update_context_ref(old_cluster, new_cluster, 'cluster')
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old_user = append_or_replace(
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config['users'],
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new_user,
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lambda u: (
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u['name'] == new_user['name'] or u['user'] == new_user['user']
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)
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)
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update_context_ref(old_user, new_user, 'user')
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append_or_replace(
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config['contexts'],
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new_context,
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lambda c: (
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c['name'] == new_context_name
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)
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)
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# save config file
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config['current-context'] = new_context_name
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with open(cfg_path, 'w') as f:
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f.write(yaml.dump(config))
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