148 lines
No EOL
5 KiB
Python
148 lines
No EOL
5 KiB
Python
import os
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import logging
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import json
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import base64
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from requests import Request, Session
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from util.config.provider.baseprovider import get_yaml, CannotWriteConfigException
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from util.config.provider.fileprovider import FileConfigProvider
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logger = logging.getLogger(__name__)
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KUBERNETES_API_HOST = os.environ.get('KUBERNETES_SERVICE_HOST', '')
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port = os.environ.get('KUBERNETES_SERVICE_PORT')
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if port:
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KUBERNETES_API_HOST += ':' + port
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SERVICE_ACCOUNT_TOKEN_PATH = '/var/run/secrets/kubernetes.io/serviceaccount/token'
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QE_NAMESPACE = os.environ.get('QE_K8S_NAMESPACE', 'quay-enterprise')
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QE_CONFIG_SECRET = os.environ.get('QE_K8S_CONFIG_SECRET', 'quay-enterprise-config-secret')
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class KubernetesConfigProvider(FileConfigProvider):
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""" Implementation of the config provider that reads and writes configuration
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data from a Kubernetes Secret. """
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def __init__(self, config_volume, yaml_filename, py_filename):
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super(KubernetesConfigProvider, self).__init__(config_volume, yaml_filename, py_filename)
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self.yaml_filename = yaml_filename
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# Load the service account token from the local store.
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if not os.path.exists(SERVICE_ACCOUNT_TOKEN_PATH):
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raise Exception('Cannot load Kubernetes service account token')
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with open(SERVICE_ACCOUNT_TOKEN_PATH, 'r') as f:
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self._service_token = f.read()
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# Make sure the configuration volume exists.
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if not self.volume_exists():
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os.makedirs(config_volume)
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@property
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def provider_id(self):
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return 'k8s'
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def save_config(self, config_obj):
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self._update_secret_file(self.yaml_filename, get_yaml(config_obj))
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super(KubernetesConfigProvider, self).save_config(config_obj)
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def write_volume_file(self, filename, contents):
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super(KubernetesConfigProvider, self).write_volume_file(filename, contents)
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try:
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self._update_secret_file(filename, contents)
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except IOError as ioe:
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raise CannotWriteConfigException(str(ioe))
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def volume_file_exists(self, filename):
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secret = self._lookup_secret()
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return filename in secret
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def list_volume_directory(self, path):
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secret = self._lookup_secret()
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paths = []
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for filename in secret:
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if filename.startswith(path):
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paths.append(filename[len(path) + 1:])
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def remove_volume_file(self, filename):
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super(KubernetesConfigProvider, self).remove_volume_file(filename)
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try:
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self._update_secret_file(filename, None)
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except IOError as ioe:
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raise CannotWriteConfigException(str(ioe))
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def save_volume_file(self, filename, flask_file):
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filepath = super(KubernetesConfigProvider, self).save_volume_file(filename, flask_file)
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with open(filepath, 'r') as f:
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self.write_volume_file(filename, f.read())
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def _assert_success(self, response):
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if response.status_code != 200:
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logger.error('Kubernetes API call failed with response: %s => %s', response.status_code,
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response.text)
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raise CannotWriteConfigException('Kubernetes API call failed: %s' % response.text)
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def _update_secret_file(self, filename, value=None):
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# Check first that the namespace for Quay Enterprise exists. If it does not, report that
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# as an error, as it seems to be a common issue.
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namespace_url = 'namespaces/%s' % (QE_NAMESPACE)
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response = self._execute_k8s_api('GET', namespace_url)
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if response.status_code // 100 != 2:
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msg = 'A Kubernetes namespace with name `%s` must be created to save config' % QE_NAMESPACE
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raise CannotWriteConfigException(msg)
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# Check if the secret exists. If not, then we create an empty secret and then update the file
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# inside.
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secret_url = 'namespaces/%s/secrets/%s' % (QE_NAMESPACE, QE_CONFIG_SECRET)
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secret = self._lookup_secret()
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if secret is None:
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self._assert_success(self._execute_k8s_api('POST', secret_url, {
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"kind": "Secret",
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"apiVersion": "v1",
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"metadata": {
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"name": QE_CONFIG_SECRET
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},
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"data": {}
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}))
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# Update the secret to reflect the file change.
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secret['data'] = secret.get('data', {})
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if value is not None:
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secret['data'][filename] = base64.b64encode(value)
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else:
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secret['data'].pop(filename)
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self._assert_success(self._execute_k8s_api('PUT', secret_url, secret))
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def _lookup_secret(self):
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secret_url = 'namespaces/%s/secrets/%s' % (QE_NAMESPACE, QE_CONFIG_SECRET)
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response = self._execute_k8s_api('GET', secret_url)
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if response.status_code != 200:
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return None
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return json.loads(response.text)
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def _execute_k8s_api(self, method, relative_url, data=None):
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headers = {
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'Authorization': 'Bearer ' + self._service_token
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}
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if data:
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headers['Content-Type'] = 'application/json'
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data = json.dumps(data) if data else None
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session = Session()
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url = 'https://%s/api/v1/%s' % (KUBERNETES_API_HOST, relative_url)
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request = Request(method, url, data=data, headers=headers)
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return session.send(request.prepare(), verify=False, timeout=2)
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def get_volume_path(self, directory, filename):
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return "_".join([directory.rstrip('/'), filename]) |