Add fetching of qe deployments in config tool
This commit is contained in:
Sam Chow
parent
2c61c87712
commit
3d4e43c8d1
24 changed files with 484 additions and 18 deletions
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@ -8,12 +8,13 @@ class TransientDirectoryProvider(FileConfigProvider):
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from/to the file system, only using temporary directories,
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deleting old dirs and creating new ones as requested.
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"""
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def __init__(self, config_volume, yaml_filename, py_filename):
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def __init__(self, config_volume, yaml_filename, py_filename, kubernetes=False):
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# Create a temp directory that will be cleaned up when we change the config path
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# This should ensure we have no "pollution" of different configs:
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# no uploaded config should ever affect subsequent config modifications/creations
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temp_dir = TemporaryDirectory()
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self.temp_dir = temp_dir
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self.kubernetes = kubernetes
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super(TransientDirectoryProvider, self).__init__(temp_dir.name, yaml_filename, py_filename)
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@property
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@ -33,3 +34,9 @@ class TransientDirectoryProvider(FileConfigProvider):
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def get_config_dir_path(self):
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return self.config_volume
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def save_configuration_to_kubernetes(self):
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if not self.kubernetes:
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raise Exception("Not on kubernetes, cannot save configuration.")
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print('do stuf')
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@ -3,10 +3,10 @@ from config_app.config_util.config.testprovider import TestConfigProvider
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from config_app.config_util.config.TransientDirectoryProvider import TransientDirectoryProvider
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def get_config_provider(config_volume, yaml_filename, py_filename, testing=False):
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def get_config_provider(config_volume, yaml_filename, py_filename, testing=False, kubernetes=False):
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""" Loads and returns the config provider for the current environment. """
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if testing:
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return TestConfigProvider()
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return TransientDirectoryProvider(config_volume, yaml_filename, py_filename)
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return TransientDirectoryProvider(config_volume, yaml_filename, py_filename, kubernetes=kubernetes)
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182
config_app/config_util/k8sinterface.py
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182
config_app/config_util/k8sinterface.py
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@ -0,0 +1,182 @@
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import os
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import logging
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import json
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import base64
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import time
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from cStringIO import StringIO
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from requests import Request, Session
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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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# The name of the quay enterprise deployment (not config app) that is used to query & rollout
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QE_DEPLOYMENT_SELECTOR = os.environ.get('QE_DEPLOYMENT_SELECTOR', 'quay-enterprise-app')
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class KubernetesAccessInterface:
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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, api_host=None, service_account_token_path=None):
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service_account_token_path = service_account_token_path or SERVICE_ACCOUNT_TOKEN_PATH
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api_host = api_host or KUBERNETES_API_HOST
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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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self._api_host = api_host
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# def volume_file_exists(self, relative_file_path):
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# if '/' in relative_file_path:
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# raise Exception('Expected path from get_volume_path, but found slashes')
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#
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# # NOTE: Overridden because we don't have subdirectories, which aren't supported
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# # in Kubernetes secrets.
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# secret = self._lookup_secret()
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# if not secret or not secret.get('data'):
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# return False
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# return relative_file_path in secret['data']
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#
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# def list_volume_directory(self, path):
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# # NOTE: Overridden because we don't have subdirectories, which aren't supported
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# # in Kubernetes secrets.
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# secret = self._lookup_secret()
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#
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# if not secret:
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# return []
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#
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# paths = []
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# for filename in secret.get('data', {}):
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# if filename.startswith(path):
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# paths.append(filename[len(path) + 1:])
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# return paths
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#
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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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#
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# def remove_volume_file(self, relative_file_path):
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# try:
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# self._update_secret_file(relative_file_path, None)
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# except IOError as ioe:
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# raise CannotWriteConfigException(str(ioe))
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#
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# def save_volume_file(self, flask_file, relative_file_path):
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# # Write the file to a temp location.
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# buf = StringIO()
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# try:
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# try:
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# flask_file.save(buf)
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# except IOError as ioe:
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# raise CannotWriteConfigException(str(ioe))
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#
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# self._update_secret_file(relative_file_path, buf.getvalue())
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# finally:
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# buf.close()
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def get_num_qe_pods(self):
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# TODO: change to get /deployments?labelSelector={labelName}%3D{labelValue}
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# right now just get the hardcoded deployment name
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deployment_url = 'namespaces/%s/deployments/%s' % (QE_NAMESPACE, QE_DEPLOYMENT_SELECTOR)
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response = self._execute_k8s_api('GET', deployment_url, api_prefix='apis/extensions/v1beta1')
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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 _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, relative_file_path, value=None):
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# if '/' in relative_file_path:
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# raise Exception('Expected path from get_volume_path, but found slashes')
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#
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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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#
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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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#
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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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#
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# if value is not None:
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# secret['data'][relative_file_path] = base64.b64encode(value)
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# else:
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# secret['data'].pop(relative_file_path)
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#
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# self._assert_success(self._execute_k8s_api('PUT', secret_url, secret))
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#
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# # Wait until the local mounted copy of the secret has been updated, as
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# # this is an eventual consistency operation, but the caller expects immediate
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# # consistency.
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# while True:
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# matching_files = set()
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# for secret_filename, encoded_value in secret['data'].iteritems():
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# expected_value = base64.b64decode(encoded_value)
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# try:
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# with self.get_volume_file(secret_filename) as f:
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# contents = f.read()
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#
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# if contents == expected_value:
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# matching_files.add(secret_filename)
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# except IOError:
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# continue
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#
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# if matching_files == set(secret['data'].keys()):
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# break
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#
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# # Sleep for a second and then try again.
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# time.sleep(1)
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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, api_prefix='api/v1'):
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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/%s/%s' % (self._api_host, api_prefix, 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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