109 lines
3.4 KiB
Python
109 lines
3.4 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 = 'kubernetes.default.svc.cluster.local'
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SERVICE_ACCOUNT_TOKEN_PATH = '/var/run/secrets/kubernetes.io/serviceaccount/token'
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ER_NAMESPACE = 'quay'
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ER_CONFIG_SECRET = 'quay-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 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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try:
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with open(filepath, 'r') as f:
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self._update_secret_file(filename, f.read())
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except IOError as ioe:
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raise CannotWriteConfigException(str(ioe))
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def _assert_success(self, response):
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if response.status_code != 200:
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logger.error('K8s API call failed with response: %s => %s', response.status_code,
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response.text)
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raise CannotWriteConfigException('K8s API call failed. Please report this to support')
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def _update_secret_file(self, filename, value):
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secret_data = {}
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secret_data[filename] = base64.b64encode(value)
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data = {
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"kind": "Secret",
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"apiVersion": "v1",
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"metadata": {
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"name": ER_CONFIG_SECRET
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},
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"data": secret_data
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}
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secret_url = 'namespaces/%s/secrets/%s' % (ER_NAMESPACE, ER_CONFIG_SECRET)
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secret = self._lookup_secret()
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if not secret:
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self._assert_success(self._execute_k8s_api('POST', secret_url, data))
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return
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if not 'data' in secret:
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secret['data'] = {}
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secret['data'][filename] = base64.b64encode(value)
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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' % (ER_NAMESPACE, ER_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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