mirror of
https://github.com/jupyterhub/the-littlest-jupyterhub.git
synced 2025-12-18 21:54:05 +08:00
318 lines
8.9 KiB
Python
318 lines
8.9 KiB
Python
"""
|
|
Commandline interface for setting config items in config.yaml.
|
|
|
|
Used as:
|
|
|
|
tljh-config set firstlevel.second_level something
|
|
|
|
tljh-config show
|
|
|
|
tljh-config show firstlevel
|
|
|
|
tljh-config show firstlevel.second_level
|
|
"""
|
|
|
|
import argparse
|
|
from copy import deepcopy
|
|
import os
|
|
import re
|
|
import sys
|
|
|
|
from ruamel.yaml import YAML
|
|
from ruamel.yaml.comments import CommentedMap, CommentedSeq
|
|
yaml = YAML(typ='rt')
|
|
|
|
|
|
INSTALL_PREFIX = os.environ.get('TLJH_INSTALL_PREFIX', '/opt/tljh')
|
|
HUB_ENV_PREFIX = os.path.join(INSTALL_PREFIX, 'hub')
|
|
USER_ENV_PREFIX = os.path.join(INSTALL_PREFIX, 'user')
|
|
STATE_DIR = os.path.join(INSTALL_PREFIX, 'state')
|
|
CONFIG_DIR = os.path.join(INSTALL_PREFIX, 'config')
|
|
CONFIG_FILE = os.path.join(CONFIG_DIR, 'config.yaml')
|
|
|
|
|
|
def set_item_in_config(config, property_path, value):
|
|
"""
|
|
Set key at property_path to value in config & return new config.
|
|
|
|
config is not mutated.
|
|
|
|
property_path is a series of dot separated values. Any part of the path
|
|
that does not exist is created.
|
|
"""
|
|
path_components = property_path.split('.')
|
|
|
|
# Mutate a copy of the config, not config itself
|
|
cur_part = config_copy = deepcopy(config)
|
|
for i, cur_path in enumerate(path_components):
|
|
cur_path = path_components[i]
|
|
if i == len(path_components) - 1:
|
|
# Final component
|
|
cur_part[cur_path] = value
|
|
else:
|
|
# If we are asked to create new non-leaf nodes, we will always make them dicts
|
|
# This means setting is *destructive* - will replace whatever is down there!
|
|
if cur_path not in cur_part or not _is_dict(cur_part[cur_path]):
|
|
cur_part[cur_path] = {}
|
|
cur_part = cur_part[cur_path]
|
|
|
|
return config_copy
|
|
|
|
def add_item_to_config(config, property_path, value):
|
|
"""
|
|
Add an item to a list in config.
|
|
"""
|
|
path_components = property_path.split('.')
|
|
|
|
# Mutate a copy of the config, not config itself
|
|
cur_part = config_copy = deepcopy(config)
|
|
for i, cur_path in enumerate(path_components):
|
|
if i == len(path_components) - 1:
|
|
# Final component, it must be a list and we append to it
|
|
if cur_path not in cur_part or not _is_list(cur_part[cur_path]):
|
|
cur_part[cur_path] = []
|
|
cur_part = cur_part[cur_path]
|
|
|
|
cur_part.append(value)
|
|
else:
|
|
# If we are asked to create new non-leaf nodes, we will always make them dicts
|
|
# This means setting is *destructive* - will replace whatever is down there!
|
|
if cur_path not in cur_part or not _is_dict(cur_part[cur_path]):
|
|
cur_part[cur_path] = {}
|
|
cur_part = cur_part[cur_path]
|
|
|
|
return config_copy
|
|
|
|
|
|
def remove_item_from_config(config, property_path, value):
|
|
"""
|
|
Add an item to a list in config.
|
|
"""
|
|
path_components = property_path.split('.')
|
|
|
|
# Mutate a copy of the config, not config itself
|
|
cur_part = config_copy = deepcopy(config)
|
|
for i, cur_path in enumerate(path_components):
|
|
if i == len(path_components) - 1:
|
|
# Final component, it must be a list and we append to it
|
|
if cur_path not in cur_part or not _is_list(cur_part[cur_path]):
|
|
raise ValueError(f'{property_path} is not a list')
|
|
cur_part = cur_part[cur_path]
|
|
cur_part.remove(value)
|
|
else:
|
|
if cur_path not in cur_part or not _is_dict(cur_part[cur_path]):
|
|
raise ValueError(f'{property_path} does not exist in config!')
|
|
cur_part = cur_part[cur_path]
|
|
|
|
return config_copy
|
|
|
|
|
|
def show_config(config_path):
|
|
"""
|
|
Pretty print config from given config_path
|
|
"""
|
|
try:
|
|
with open(config_path) as f:
|
|
config = yaml.load(f)
|
|
except FileNotFoundError:
|
|
config = {}
|
|
|
|
yaml.dump(config, sys.stdout)
|
|
|
|
|
|
def set_config_value(config_path, key_path, value):
|
|
"""
|
|
Set key at key_path in config_path to value
|
|
"""
|
|
# FIXME: Have a file lock here
|
|
# FIXME: Validate schema here
|
|
try:
|
|
with open(config_path) as f:
|
|
config = yaml.load(f)
|
|
except FileNotFoundError:
|
|
config = {}
|
|
|
|
config = set_item_in_config(config, key_path, value)
|
|
|
|
with open(config_path, 'w') as f:
|
|
yaml.dump(config, f)
|
|
|
|
|
|
def add_config_value(config_path, key_path, value):
|
|
"""
|
|
Add value to list at key_path
|
|
"""
|
|
# FIXME: Have a file lock here
|
|
# FIXME: Validate schema here
|
|
try:
|
|
with open(config_path) as f:
|
|
config = yaml.load(f)
|
|
except FileNotFoundError:
|
|
config = {}
|
|
|
|
config = add_item_to_config(config, key_path, value)
|
|
|
|
with open(config_path, 'w') as f:
|
|
yaml.dump(config, f)
|
|
|
|
|
|
def remove_config_value(config_path, key_path, value):
|
|
"""
|
|
Remove value from list at key_path
|
|
"""
|
|
# FIXME: Have a file lock here
|
|
# FIXME: Validate schema here
|
|
try:
|
|
with open(config_path) as f:
|
|
config = yaml.load(f)
|
|
except FileNotFoundError:
|
|
config = {}
|
|
|
|
config = remove_item_from_config(config, key_path, value)
|
|
|
|
with open(config_path, 'w') as f:
|
|
yaml.dump(config, f)
|
|
|
|
|
|
def reload_component(component):
|
|
"""
|
|
Reload a TLJH component.
|
|
|
|
component can be 'hub' or 'proxy'.
|
|
"""
|
|
# import here to avoid circular imports
|
|
from tljh import systemd, traefik
|
|
if component == 'hub':
|
|
systemd.restart_service('jupyterhub')
|
|
# FIXME: Verify hub is back up?
|
|
print('Hub reload with new configuration complete')
|
|
elif component == 'proxy':
|
|
traefik.ensure_traefik_config(STATE_DIR)
|
|
systemd.restart_service('configurable-http-proxy')
|
|
systemd.restart_service('traefik')
|
|
print('Proxy reload with new configuration complete')
|
|
|
|
|
|
def parse_value(value_str):
|
|
"""Parse a value string"""
|
|
if value_str is None:
|
|
return value_str
|
|
if re.match(r'^\d+$', value_str):
|
|
return int(value_str)
|
|
elif re.match(r'^\d+\.\d*$', value_str):
|
|
return float(value_str)
|
|
elif value_str.lower() == 'true':
|
|
return True
|
|
elif value_str.lower() == 'false':
|
|
return False
|
|
else:
|
|
# it's a string
|
|
return value_str
|
|
|
|
|
|
def _is_dict(item):
|
|
return isinstance(item, (dict, CommentedMap))
|
|
|
|
|
|
def _is_list(item):
|
|
return isinstance(item, (list, CommentedSeq))
|
|
|
|
|
|
def main(argv=None):
|
|
if argv is None:
|
|
argv = sys.argv[1:]
|
|
|
|
from .log import init_logging
|
|
try:
|
|
init_logging()
|
|
except Exception as e:
|
|
print(str(e))
|
|
print("Perhaps you didn't use `sudo -E`?")
|
|
|
|
argparser = argparse.ArgumentParser()
|
|
argparser.add_argument(
|
|
'--config-path',
|
|
default=CONFIG_FILE,
|
|
help='Path to TLJH config.yaml file'
|
|
)
|
|
subparsers = argparser.add_subparsers(dest='action')
|
|
|
|
show_parser = subparsers.add_parser(
|
|
'show',
|
|
help='Show current configuration'
|
|
)
|
|
|
|
set_parser = subparsers.add_parser(
|
|
'set',
|
|
help='Set a configuration property'
|
|
)
|
|
set_parser.add_argument(
|
|
'key_path',
|
|
help='Dot separated path to configuration key to set'
|
|
)
|
|
set_parser.add_argument(
|
|
'value',
|
|
help='Value to set the configuration key to'
|
|
)
|
|
|
|
add_item_parser = subparsers.add_parser(
|
|
'add-item',
|
|
help='Add a value to a list for a configuration property'
|
|
)
|
|
add_item_parser.add_argument(
|
|
'key_path',
|
|
help='Dot separated path to configuration key to add value to'
|
|
)
|
|
add_item_parser.add_argument(
|
|
'value',
|
|
help='Value to add to the configuration key'
|
|
)
|
|
|
|
remove_item_parser = subparsers.add_parser(
|
|
'remove-item',
|
|
help='Remove a value from a list for a configuration property'
|
|
)
|
|
remove_item_parser.add_argument(
|
|
'key_path',
|
|
help='Dot separated path to configuration key to remove value from'
|
|
)
|
|
remove_item_parser.add_argument(
|
|
'value',
|
|
help='Value to remove from key_path'
|
|
)
|
|
|
|
reload_parser = subparsers.add_parser(
|
|
'reload',
|
|
help='Reload a component to apply configuration change'
|
|
)
|
|
reload_parser.add_argument(
|
|
'component',
|
|
choices=('hub', 'proxy'),
|
|
help='Which component to reload',
|
|
default='hub',
|
|
nargs='?'
|
|
)
|
|
|
|
args = argparser.parse_args(argv)
|
|
|
|
try:
|
|
if args.action == 'show':
|
|
show_config(args.config_path)
|
|
elif args.action == 'set':
|
|
set_config_value(args.config_path, args.key_path, parse_value(args.value))
|
|
elif args.action == 'add-item':
|
|
add_config_value(args.config_path, args.key_path, parse_value(args.value))
|
|
elif args.action == 'remove-item':
|
|
remove_config_value(args.config_path, args.key_path, parse_value(args.value))
|
|
elif args.action == 'reload':
|
|
reload_component(args.component)
|
|
else:
|
|
argparser.print_help()
|
|
except Exception as e:
|
|
print(str(e))
|
|
print("Perhaps you didn't use `sudo -E`?")
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|