implment initial config + pki generation
This commit is contained in:
parent
fac36cec4f
commit
9b165b6c70
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@ -1,4 +1,4 @@
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from . import logging, operator
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from . import generator, logging, operator
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import click
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__all__ = []
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@ -57,3 +57,17 @@ def join(*, asset_dir, config_path, hostname, target_dir):
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target_dir=target_dir)
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op.join(asset_dir=asset_dir)
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@promenade.command(help='Generate certs and keys')
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@click.option('-c', '--config-path', type=click.File(),
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required=True,
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help='Location of cluster configuration data.')
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@click.option('-o', '--output-dir', default='.',
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type=click.Path(exists=True, file_okay=False, dir_okay=True,
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resolve_path=True),
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required=True,
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help='Location to write complete cluster configuration.')
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def generate(*, config_path, output_dir):
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g = generator.Generator.from_config(config_path=config_path)
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g.generate_all(output_dir)
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@ -1,113 +1,95 @@
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from . import logging
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from operator import itemgetter
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from operator import attrgetter, itemgetter
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import itertools
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import yaml
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__all__ = ['load_config_file']
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__all__ = ['Configuration', 'Document', 'load']
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LOG = logging.getLogger(__name__)
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def load_config_file(*, config_path, hostname):
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LOG.debug('Loading genesis configuration from "%s"', config_path)
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cluster_data = yaml.load(open(config_path))
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LOG.debug('Loaded genesis configruation from "%s"', config_path)
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node_data = extract_node_data(hostname, cluster_data)
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def load(f):
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return Configuration(list(map(Document, yaml.load_all(f))))
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return {
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'cluster_data': cluster_data,
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'node_data': node_data,
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class Document:
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KEYS = {
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'apiVersion',
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'metadata',
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'kind',
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'spec',
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}
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def extract_node_data(hostname, cluster_data):
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genesis = _extract_genesis_data(cluster_data['nodes'])
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masters = _extract_master_data(cluster_data['nodes'])
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return {
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'cluster': cluster_data['nodes'],
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'current_node': _extract_current_node_data(cluster_data['nodes'],
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hostname),
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'etcd': _extract_etcd_data(hostname, genesis, masters),
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'genesis': genesis,
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'masters': masters,
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'network': cluster_data['network'],
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SUPPORTED_KINDS = {
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'Certificate',
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'CertificateAuthority',
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'CertificateAuthorityKey',
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'CertificateKey',
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'Cluster',
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'Etcd',
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'Masters',
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'Network',
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'Node',
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'PrivateKey',
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'PublicKey',
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}
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def __init__(self, data):
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assert set(data.keys()) == self.KEYS
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assert data['apiVersion'] == 'promenade/v1'
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assert data['kind'] in self.SUPPORTED_KINDS
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def _extract_etcd_data(hostname, genesis, masters):
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LOG.info('hostname=%r genesis=%r masters=%r',
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hostname, genesis, masters)
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non_genesis_masters = [d for d in masters if d['hostname'] != genesis['hostname']]
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boot_order = [genesis] + sorted(non_genesis_masters, key=itemgetter('hostname'))
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self.data = data
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result = {
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'boot_order': boot_order,
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'env': {},
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}
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@property
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def kind(self):
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return self.data['kind']
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peers = [
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{
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'hostname': 'auxiliary-etcd-%d' % i,
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'peer_port': 2380 + (i + 1) * 10000
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}
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for i in range(2)
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]
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peers.append({
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'hostname': genesis['hostname'],
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})
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@property
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def target(self):
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return self.metadata.get('target')
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if hostname == genesis['hostname']:
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result['env']['ETCD_INITIAL_CLUSTER_STATE'] = 'new'
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else:
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result['env']['ETCD_INITIAL_CLUSTER_STATE'] = 'existing'
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for host in non_genesis_masters:
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peers.append({'hostname': host['hostname']})
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@property
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def metadata(self):
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return self.data['metadata']
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result['env']['ETCD_INITIAL_CLUSTER'] = ','.join(
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'%s=https://%s:%d' % (p['hostname'], p['hostname'], p.get('peer_port', 2380))
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for p in peers)
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return result
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def __getitem__(self, key):
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return self.data['spec'][key]
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def _extract_current_node_data(nodes, hostname):
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base = nodes[hostname]
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return {
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'hostname': hostname,
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'labels': _extract_node_labels(base),
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**base,
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}
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class Configuration:
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def __init__(self, documents):
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self.documents = sorted(documents, key=attrgetter('kind', 'target'))
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def __getitem__(self, key):
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results = [d for d in self.documents if d.kind == key]
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if len(results) < 1:
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raise KeyError
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elif len(results) > 1:
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raise KeyError('Too many results.')
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else:
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return results[0]
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ROLE_LABELS = {
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'genesis': [
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'promenade=genesis',
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],
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'master': [
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'node-role.kubernetes.io/master=',
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],
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}
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def iterate(self, *, kind=None, target=None):
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if target:
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docs = self._iterate_with_target(target)
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else:
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docs = self.documents
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for document in docs:
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if not kind or document.kind == kind:
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yield document
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def _extract_node_labels(data):
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labels = set(itertools.chain.from_iterable(
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map(lambda k: ROLE_LABELS.get(k, []), ['common'] + data['roles'])))
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labels.update(data.get('additional_labels', []))
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return sorted(labels)
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def _iterate_with_target(self, target):
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for document in self.documents:
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if document.target == target or document.target == 'all':
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yield document
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def _extract_genesis_data(nodes):
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for hostname, node in nodes.items():
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if 'genesis' in node['roles']:
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return {
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'hostname': hostname,
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'ip': node['ip'],
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}
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def _extract_master_data(nodes):
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return sorted(({'hostname': hostname, 'ip': node['ip']}
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for hostname, node in nodes.items()
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if 'master' in node['roles']),
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key=itemgetter('hostname'))
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def write(self, path):
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with open(path, 'w') as f:
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yaml.dump_all(map(attrgetter('data'), self.documents),
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default_flow_style=False,
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explicit_start=True,
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indent=2,
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stream=f)
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@ -0,0 +1,327 @@
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from . import config, logging, pki
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import os
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__all__ = ['Generator']
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LOG = logging.getLogger(__name__)
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class Generator:
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@classmethod
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def from_config(cls, *, config_path):
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return cls(input_config=(config.load(config_path)))
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def __init__(self, *, input_config):
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self.input_config = input_config
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self.validate()
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def validate(self):
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required_kinds = ['Cluster', 'Network']
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for required_kind in required_kinds:
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try:
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self.input_config[required_kind]
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except KeyError:
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LOG.error('Generator requires one "%s" document to function.',
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required_kind)
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raise
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assert self.input_config['Cluster'].metadata['name'] \
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== self.input_config['Network'].metadata['cluster']
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def generate_all(self, output_dir):
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cluster = self.input_config['Cluster']
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network = self.input_config['Network']
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cluster_name = cluster.metadata['name']
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LOG.info('Generating configuration for cluster "%s"', cluster_name)
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masters = self.construct_masters(cluster_name)
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LOG.info('Generating common PKI for cluster "%s"', cluster_name)
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keys = pki.PKI(cluster_name)
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cluster_ca, cluster_ca_key = keys.generate_ca(
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ca_name='cluster',
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cert_target='all',
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key_target='masters')
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etcd_client_ca, etcd_client_ca_key = keys.generate_ca(
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ca_name='etcd-client',
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cert_target='all',
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key_target='masters')
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etcd_peer_ca, etcd_peer_ca_key = keys.generate_ca(
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ca_name='etcd-peer',
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cert_target='all',
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key_target='masters')
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admin_cert, admin_cert_key = keys.generate_certificate(
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name='admin',
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ca_name='cluster',
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groups=['system:masters'],
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target='masters',
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)
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sa_pub, sa_priv = keys.generate_keypair(
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name='service-account',
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target='masters',
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)
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config.Configuration([
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cluster_ca,
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cluster_ca_key,
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etcd_client_ca,
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etcd_client_ca_key,
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etcd_peer_ca,
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etcd_peer_ca_key,
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sa_pub,
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sa_priv,
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]).write(os.path.join(output_dir, 'admin-bundle.yaml'))
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for hostname, data in cluster['nodes'].items():
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if 'genesis' in data['roles']:
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genesis_hostname = hostname
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break
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for hostname, data in cluster['nodes'].items():
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LOG.debug('Generating configuration & PKI for hostname=%s',
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hostname)
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node = _construct_node_config(cluster_name, hostname, data)
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kubelet_cert, kubelet_cert_key = keys.generate_certificate(
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alias='kubelet',
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name='system:node:%s' % hostname,
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ca_name='cluster',
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groups=['system:nodes'],
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hosts=[
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hostname,
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data['ip'],
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],
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target=hostname)
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proxy_cert, proxy_cert_key = keys.generate_certificate(
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alias='proxy',
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name='system:kube-proxy',
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ca_name='cluster',
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hosts=[
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hostname,
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data['ip'],
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],
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target=hostname)
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common_documents = [
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cluster_ca,
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kubelet_cert,
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kubelet_cert_key,
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masters,
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network,
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node,
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proxy_cert,
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proxy_cert_key,
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]
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role_specific_documents = []
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if 'master' in data['roles']:
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role_specific_documents.extend([
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admin_cert,
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admin_cert_key,
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etcd_client_ca,
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etcd_peer_ca,
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sa_priv,
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sa_pub,
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])
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if 'genesis' not in data['roles']:
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role_specific_documents.append(
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_master_etcd_config(cluster_name, genesis_hostname,
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hostname, masters)
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)
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role_specific_documents.extend(_master_config(hostname, data,
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masters, network, keys))
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if 'genesis' in data['roles']:
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role_specific_documents.extend(_genesis_config(hostname, data,
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masters, network, keys))
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role_specific_documents.append(_genesis_etcd_config(cluster_name, hostname))
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node.data['is_genesis'] = True
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c = config.Configuration(common_documents + role_specific_documents)
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c.write(os.path.join(output_dir, hostname + '.yaml'))
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def construct_masters(self, cluster_name):
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masters = []
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for hostname, data in self.input_config['Cluster']['nodes'].items():
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if 'master' in data['roles'] or 'genesis' in data['roles']:
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masters.append({'hostname': hostname, 'ip': data['ip']})
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return config.Document({
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'apiVersion': 'promenade/v1',
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'kind': 'Masters',
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'metadata': {
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'cluster': cluster_name,
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'target': 'all',
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},
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'spec': {
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'nodes': masters,
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},
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})
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def _master_etcd_config(cluster_name, genesis_hostname, hostname, masters):
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initial_cluster = ['%s=https://%s:2380' % (m['hostname'],
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m['hostname'])
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for m in masters['nodes']]
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initial_cluster.extend([
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'auxiliary-etcd-0=https://%s:12380' % genesis_hostname,
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'auxiliary-etcd-1=https://%s:22380' % genesis_hostname,
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])
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return _etcd_config(cluster_name, target=hostname,
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initial_cluster=initial_cluster,
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initial_cluster_state='existing')
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def _genesis_etcd_config(cluster_name, hostname):
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initial_cluster = [
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'%s=https://%s:2380' % (hostname, hostname),
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'auxiliary-etcd-0=https://%s:12380' % hostname,
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'auxiliary-etcd-1=https://%s:22380' % hostname,
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]
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return _etcd_config(cluster_name, target=hostname,
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initial_cluster=initial_cluster,
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initial_cluster_state='new')
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def _etcd_config(cluster_name, *, target,
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initial_cluster, initial_cluster_state):
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return config.Document({
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'apiVersion': 'promenade/v1',
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'kind': 'Etcd',
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'metadata': {
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'cluster': cluster_name,
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'target': target,
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},
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'spec': {
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'initial_cluster': initial_cluster,
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'initial_cluster_state': initial_cluster_state,
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},
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})
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def _master_config(hostname, host_data, masters, network, keys):
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kube_domains = [
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'kubernetes',
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'kubernetes.default',
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'kubernetes.default.svc',
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'kubernetes.default.svc.cluster.local',
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'127.0.0.1',
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]
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docs = []
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docs.extend(keys.generate_certificate(
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alias='etcd-client',
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name='etcd:client:%s' % hostname,
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ca_name='etcd-client',
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hosts=kube_domains + [hostname, host_data['ip']],
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target=hostname,
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))
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docs.extend(keys.generate_certificate(
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alias='etcd-peer',
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name='etcd:peer:%s' % hostname,
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ca_name='etcd-peer',
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hosts=kube_domains + [hostname, host_data['ip']],
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target=hostname,
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))
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docs.extend(keys.generate_certificate(
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alias='apiserver',
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name='apiserver:%s' % hostname,
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ca_name='cluster',
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hosts=kube_domains + [
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network['kube_service_ip'],
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hostname,
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host_data['ip'],
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],
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target=hostname,
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))
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docs.extend(keys.generate_certificate(
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alias='controller-manager',
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name='system:kube-controller-manager',
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ca_name='cluster',
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hosts=[
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hostname,
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host_data['ip'],
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],
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target=hostname,
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))
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docs.extend(keys.generate_certificate(
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alias='scheduler',
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name='system:kube-scheduler',
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ca_name='cluster',
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hosts=[
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hostname,
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host_data['ip'],
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],
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target=hostname,
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))
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return docs
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def _genesis_config(hostname, host_data, masters, network, keys):
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docs = []
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for i in range(2):
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docs.extend(keys.generate_certificate(
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name='auxiliary-etcd-client-%d' % i,
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ca_name='etcd-client',
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hosts=[hostname, host_data['ip']],
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target=hostname,
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))
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docs.extend(keys.generate_certificate(
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name='auxiliary-etcd-client-%d' % i,
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ca_name='etcd-peer',
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hosts=[hostname, host_data['ip']],
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target=hostname,
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))
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return docs
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def _construct_node_config(cluster_name, hostname, data):
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spec = {
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'hostname': hostname,
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'ip': data['ip'],
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'labels': _labels(data['roles'], data.get('additional_labels', [])),
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'templates': _templates(data['roles']),
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}
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return config.Document({
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'apiVersion': 'promenade/v1',
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'kind': 'Node',
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'metadata': {
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'cluster': cluster_name,
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'target': hostname,
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},
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'spec': spec,
|
||||
})
|
||||
|
||||
|
||||
ROLE_LABELS = {
|
||||
'genesis': [
|
||||
'promenade=genesis',
|
||||
],
|
||||
'master': [
|
||||
'node-role.kubernetes.io/master=',
|
||||
],
|
||||
}
|
||||
|
||||
|
||||
def _labels(roles, additional_labels):
|
||||
result = set()
|
||||
for role in roles:
|
||||
result.update(ROLE_LABELS.get(role, []))
|
||||
result.update(additional_labels)
|
||||
return sorted(result)
|
||||
|
||||
|
||||
def _templates(roles):
|
||||
return ['common'] + roles
|
149
promenade/pki.py
149
promenade/pki.py
|
@ -1,15 +1,160 @@
|
|||
from promenade import logging
|
||||
from . import config, logging
|
||||
import json
|
||||
import os
|
||||
import shutil
|
||||
import subprocess
|
||||
import tempfile
|
||||
import yaml
|
||||
|
||||
__all__ = ['generate_keys']
|
||||
__all__ = ['PKI']
|
||||
|
||||
|
||||
LOG = logging.getLogger(__name__)
|
||||
|
||||
|
||||
class PKI:
|
||||
def __init__(self, cluster_name, *, ca_config=None):
|
||||
self.certificate_authorities = {}
|
||||
self.cluster_name = cluster_name
|
||||
|
||||
self._ca_config_string = None
|
||||
if ca_config:
|
||||
self._ca_config_string = json.dumps(ca_config)
|
||||
|
||||
@property
|
||||
def ca_config(self):
|
||||
if not self._ca_config_string:
|
||||
self._ca_config_string = json.dumps({
|
||||
'signing': {
|
||||
'default': {
|
||||
'expiry': '8760h',
|
||||
'usages': ['signing', 'key encipherment', 'server auth', 'client auth'],
|
||||
},
|
||||
},
|
||||
})
|
||||
return self._ca_config_string
|
||||
|
||||
def generate_ca(self, *, ca_name, cert_target, key_target):
|
||||
result = self._cfssl(['gencert', '-initca', 'csr.json'],
|
||||
files={
|
||||
'csr.json': self.csr(
|
||||
name='Kubernetes',
|
||||
groups=['Kubernetes']),
|
||||
})
|
||||
LOG.debug('ca_cert=%r', result['cert'])
|
||||
self.certificate_authorities[ca_name] = result
|
||||
|
||||
return (self._wrap('CertificateAuthority', result['cert'],
|
||||
name=ca_name,
|
||||
target=cert_target),
|
||||
self._wrap('CertificateAuthorityKey', result['key'],
|
||||
name=ca_name,
|
||||
target=key_target))
|
||||
|
||||
def generate_keypair(self, *, alias=None, name, target):
|
||||
priv_result = self._openssl(['genrsa', '-out', 'priv.pem'])
|
||||
pub_result = self._openssl(['rsa', '-in', 'priv.pem', '-pubout', '-out', 'pub.pem'],
|
||||
files={
|
||||
'priv.pem': priv_result['priv.pem'],
|
||||
})
|
||||
|
||||
if not alias:
|
||||
alias = name
|
||||
|
||||
return (self._wrap('PublicKey', pub_result['pub.pem'],
|
||||
name=alias,
|
||||
target=target),
|
||||
self._wrap('PrivateKey', priv_result['priv.pem'],
|
||||
name=alias,
|
||||
target=target))
|
||||
|
||||
|
||||
def generate_certificate(self, *, alias=None, ca_name, groups=[], hosts=[], name, target):
|
||||
result = self._cfssl(
|
||||
['gencert',
|
||||
'-ca', 'ca.pem',
|
||||
'-ca-key', 'ca-key.pem',
|
||||
'-config', 'ca-config.json',
|
||||
'csr.json'],
|
||||
files={
|
||||
'ca-config.json': self.ca_config,
|
||||
'ca.pem': self.certificate_authorities[ca_name]['cert'],
|
||||
'ca-key.pem': self.certificate_authorities[ca_name]['key'],
|
||||
'csr.json': self.csr(name=name, groups=groups, hosts=hosts),
|
||||
})
|
||||
|
||||
if not alias:
|
||||
alias = name
|
||||
|
||||
return (self._wrap('Certificate', result['cert'],
|
||||
name=alias,
|
||||
target=target),
|
||||
self._wrap('CertificateKey', result['key'],
|
||||
name=alias,
|
||||
target=target))
|
||||
|
||||
def csr(self, *, name, groups=[], hosts=[], key={'algo': 'rsa', 'size': 2048}):
|
||||
return json.dumps({
|
||||
'CN': name,
|
||||
'key': key,
|
||||
'hosts': hosts,
|
||||
'names': [{'O': g} for g in groups],
|
||||
})
|
||||
|
||||
def _cfssl(self, command, *, files=None):
|
||||
if not files:
|
||||
files = {}
|
||||
with tempfile.TemporaryDirectory() as tmp:
|
||||
for filename, data in files.items():
|
||||
with open(os.path.join(tmp, filename), 'w') as f:
|
||||
f.write(data)
|
||||
|
||||
return json.loads(subprocess.check_output(
|
||||
['cfssl'] + command, cwd=tmp))
|
||||
|
||||
def _openssl(self, command, *, files=None):
|
||||
if not files:
|
||||
files = {}
|
||||
|
||||
with tempfile.TemporaryDirectory() as tmp:
|
||||
for filename, data in files.items():
|
||||
with open(os.path.join(tmp, filename), 'w') as f:
|
||||
f.write(data)
|
||||
|
||||
subprocess.check_call(['openssl'] + command, cwd=tmp)
|
||||
|
||||
result = {}
|
||||
for filename in os.listdir(tmp):
|
||||
if filename not in files:
|
||||
with open(os.path.join(tmp, filename)) as f:
|
||||
result[filename] = f.read()
|
||||
|
||||
return result
|
||||
|
||||
def _wrap(self, kind, data, **metadata):
|
||||
return config.Document({
|
||||
'apiVersion': 'promenade/v1',
|
||||
'kind': kind,
|
||||
'metadata': {
|
||||
'cluster': self.cluster_name,
|
||||
**metadata,
|
||||
},
|
||||
'spec': {
|
||||
'data': block_literal(data),
|
||||
},
|
||||
})
|
||||
|
||||
|
||||
class block_literal(str): pass
|
||||
|
||||
|
||||
def block_literal_representer(dumper, data):
|
||||
return dumper.represent_scalar(u'tag:yaml.org,2002:str', data, style='|')
|
||||
|
||||
|
||||
yaml.add_representer(block_literal, block_literal_representer)
|
||||
|
||||
|
||||
CA_ONLY_MAP = {
|
||||
'cluster-ca': [
|
||||
'kubelet',
|
||||
|
|
Loading…
Reference in New Issue