788 lines
30 KiB
Python
788 lines
30 KiB
Python
#
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# Copyright (c) 2018 Wind River Systems, Inc.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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""" System Inventory Helm Overrides Operator."""
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from __future__ import absolute_import
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import eventlet
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import os
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import re
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import subprocess
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import tempfile
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import yaml
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from six import iteritems
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from stevedore import extension
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from sysinv.common import constants
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from sysinv.common import exception
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from sysinv.common import utils
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from sysinv.openstack.common import log as logging
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from sysinv.helm import common
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from sysinv.helm import manifest
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LOG = logging.getLogger(__name__)
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# Number of characters to strip off from helm plugin name defined in setup.cfg,
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# in order to allow controlling the order of the helm plugins, without changing
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# the names of the plugins.
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# The convention here is for the helm plugins to be named ###_PLUGINNAME.
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HELM_PLUGIN_PREFIX_LENGTH = 4
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def helm_context(func):
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"""Decorate to initialize the local threading context"""
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def _wrapper(self, *args, **kwargs):
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thread_context = eventlet.greenthread.getcurrent()
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setattr(thread_context, '_helm_context', dict())
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return func(self, *args, **kwargs)
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return _wrapper
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def suppress_stevedore_errors(manager, entrypoint, exception):
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"""
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stevedore.ExtensionManager will try to import the entry point defined in the module.
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For helm_applications, both stx_openstack and platform_integ_apps are virtual modules.
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So ExtensionManager will throw the "Could not load ..." error message, which is expected.
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Just suppress this error message to avoid cause confusion.
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"""
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pass
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class HelmOperator(object):
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"""Class to encapsulate helm override operations for System Inventory"""
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def __init__(self, dbapi=None):
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self.dbapi = dbapi
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# register chart operators for lookup
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self.chart_operators = {}
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# dict containing sequence of helm charts per app
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self.helm_system_applications = self.get_helm_applications()
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def get_helm_applications(self):
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"""Build a dictionary of supported helm applications"""
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helm_application_dict = {}
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helm_applications = extension.ExtensionManager(
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namespace='systemconfig.helm_applications',
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on_load_failure_callback=suppress_stevedore_errors
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)
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for entry_point in helm_applications.list_entry_points():
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helm_application_dict[entry_point.name] = entry_point.module_name
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supported_helm_applications = {}
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for name, namespace in helm_application_dict.items():
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supported_helm_applications[name] = []
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helm_plugins = extension.ExtensionManager(namespace=namespace, invoke_on_load=True, invoke_args=(self,))
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sorted_helm_plugins = sorted(helm_plugins.extensions, key=lambda x: x.name)
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for plugin in sorted_helm_plugins:
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plugin_name = plugin.name[HELM_PLUGIN_PREFIX_LENGTH:]
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self.chart_operators.update({plugin_name: plugin.obj})
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# Remove duplicates, keeping last occurrence only
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if plugin_name in supported_helm_applications[name]:
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supported_helm_applications[name].remove(plugin_name)
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supported_helm_applications[name].append(plugin_name)
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return supported_helm_applications
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@property
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def context(self):
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thread_context = eventlet.greenthread.getcurrent()
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return getattr(thread_context, '_helm_context')
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def get_helm_chart_namespaces_by_app(self, chart_name, app_name):
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"""Get supported chart namespaces for a given application.
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This method retrieves the namespace supported by a given chart.
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:param chart_name: name of the chart
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:param app_name: name of the application
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:returns: list of supported namespaces that associated overrides may be
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provided.
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"""
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namespaces = []
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if chart_name in self.chart_operators:
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namespaces = self.chart_operators[chart_name].get_namespaces_by_app(
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app_name)
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return namespaces
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def get_helm_chart_namespaces(self, chart_name):
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"""Get supported chart namespaces.
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This method retrieves the namespace supported by a given chart.
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:param chart_name: name of the chart
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:returns: list of supported namespaces that associated overrides may be
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provided.
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"""
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namespaces = []
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if chart_name in self.chart_operators:
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namespaces = self.chart_operators[chart_name].get_namespaces()
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return namespaces
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@helm_context
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def get_helm_chart_overrides(self, chart_name, cnamespace=None):
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return self._get_helm_chart_overrides(chart_name, cnamespace)
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def _get_helm_chart_overrides(self, chart_name, cnamespace=None):
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"""Get the overrides for a supported chart.
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This method retrieves overrides for a supported chart. Overrides for
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all supported namespaces will be returned unless a specific namespace
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is requested.
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:param chart_name: name of a supported chart
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:param cnamespace: (optional) namespace
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:returns: dict of overrides.
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Example Without a cnamespace parameter:
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{
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'kube-system': {
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'deployment': {
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'mode': 'cluster',
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'type': 'DaemonSet'
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},
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},
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'openstack': {
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'pod': {
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'replicas': {
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'server': 1
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}
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}
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}
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}
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Example with a cnamespace parameter: cnamespace='kube-system'
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{
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'deployment': {
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'mode': 'cluster',
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'type': 'DaemonSet'
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}
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}
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"""
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overrides = {}
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if chart_name in self.chart_operators:
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try:
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overrides.update(
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self.chart_operators[chart_name].get_overrides(
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cnamespace))
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except exception.InvalidHelmNamespace:
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raise
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return overrides
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def get_helm_application_namespaces(self, app_name):
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"""Get supported application namespaces.
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This method retrieves a dict of charts and their supported namespaces
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for an application.
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:param app_name: name of the bundle of charts required to support an
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application
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:returns: dict of charts and supported namespaces that associated
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overrides may be provided.
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"""
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try:
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app = self.dbapi.kube_app_get(app_name)
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except exception.KubeAppNotFound:
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LOG.exception("Application %s not found." % app_name)
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raise
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app_namespaces = {}
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if app_name in self.helm_system_applications:
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for chart_name in self.helm_system_applications[app_name]:
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try:
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app_namespaces.update(
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{chart_name:
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self.get_helm_chart_namespaces_by_app(
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chart_name, app_name)})
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except exception.InvalidHelmNamespace as e:
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LOG.info(e)
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else:
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# Generic apps
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db_namespaces = self.dbapi.helm_override_get_all(app.id)
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for chart in db_namespaces:
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app_namespaces.setdefault(
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chart.name, []).append(chart.namespace)
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return app_namespaces
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@helm_context
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def get_helm_application_overrides(self, app_name, cnamespace=None):
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return self._get_helm_application_overrides(app_name, cnamespace)
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def _get_helm_application_overrides(self, app_name, cnamespace=None):
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"""Get the overrides for a supported set of charts.
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This method retrieves overrides for a set of supported charts that
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comprise an application. Overrides for all charts and all supported
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namespaces will be returned unless a specific namespace is requested.
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If a specific namespace is requested, then only charts that support
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that specified namespace will be returned.
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:param app_name: name of a supported application (set of charts)
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:param cnamespace: (optional) namespace
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:returns: dict of overrides.
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Example:
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{
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'ingress': {
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'kube-system': {
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'deployment': {
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'mode': 'cluster',
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'type': 'DaemonSet'
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},
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},
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'openstack': {
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'pod': {
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'replicas': {
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'server': 1
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}
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}
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}
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},
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'glance': {
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'openstack': {
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'pod': {
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'replicas': {
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'server': 1
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}
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}
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}
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}
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}
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"""
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overrides = {}
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if app_name in self.helm_system_applications:
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for chart_name in self.helm_system_applications[app_name]:
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try:
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overrides.update({chart_name:
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self._get_helm_chart_overrides(
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chart_name,
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cnamespace)})
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except exception.InvalidHelmNamespace as e:
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LOG.info(e)
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return overrides
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def _get_helm_chart_location(self, chart_name, repo_name, chart_tarfile):
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"""Get the chart location.
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This method returns the download location for a given chart.
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:param chart_name: name of the chart
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:param repo_name: name of the repo that chart uploaded to
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:param chart_tarfile: name of the chart tarfile
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:returns: a URL as location
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"""
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if repo_name is None:
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repo_name = common.HELM_REPO_FOR_APPS
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if chart_tarfile is None:
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# TODO: Clean up the assumption
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chart_tarfile = chart_name + '-0.1.0'
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return 'http://controller:{}/helm_charts/{}/{}.tgz'.format(
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utils.get_http_port(self.dbapi), repo_name, chart_tarfile)
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def _add_armada_override_header(self, chart_name, chart_metadata_name, repo_name,
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chart_tarfile, namespace, overrides):
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if chart_metadata_name is None:
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chart_metadata_name = namespace + '-' + chart_name
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new_overrides = {
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'schema': 'armada/Chart/v1',
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'metadata': {
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'schema': 'metadata/Document/v1',
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'name': chart_metadata_name
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},
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'data': {
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'values': overrides
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}
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}
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location = self._get_helm_chart_location(chart_name, repo_name, chart_tarfile)
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if location:
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new_overrides['data'].update({
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'source': {
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'location': location
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}
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})
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return new_overrides
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def _get_chart_info_from_armada_chart(self, chart_name, chart_namespace,
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chart_info_list):
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""" Extract the metadata name of the armada chart, repo and the name of
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the chart tarfile from the armada manifest chart.
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:param chart_name: name of the chart from the (application list)
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:param chart_namespace: namespace of the chart
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:param chart_info_list: a list of chart objects containing information
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extracted from the armada manifest
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:returns: the metadata name of the chart, the supported StarlingX repository,
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the name of the chart tarfile or None,None,None if not present
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"""
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# Could be called without any armada_manifest info. Returning 'None'
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# will enable helm defaults to point to common.HELM_REPO_FOR_APPS
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metadata_name = None
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repo = None
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chart_tarfile = None
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if chart_info_list is None:
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return metadata_name, repo, chart_tarfile
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location = None
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for c in chart_info_list:
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if (c.name == chart_name and
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c.namespace == chart_namespace):
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location = c.location
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metadata_name = c.metadata_name
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break
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if location:
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match = re.search('/helm_charts/(.*)/(.*).tgz', location)
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if match:
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repo = match.group(1)
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chart_tarfile = match.group(2)
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LOG.debug("Chart %s can be found in repo: %s" % (chart_name, repo))
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return metadata_name, repo, chart_tarfile
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def merge_overrides(self, file_overrides=[], set_overrides=[]):
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""" Merge helm overrides together.
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:param values: A dict of different types of user override values,
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'files' (which generally specify many overrides) and
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'set' (which generally specify one override).
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"""
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# At this point we have potentially two separate types of overrides
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# specified by system or user, values from files and values passed in
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# via --set . We need to ensure that we call helm using the same
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# mechanisms to ensure the same behaviour.
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cmd = ['helm', 'install', '--dry-run', '--debug']
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# Process the newly-passed-in override values
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tmpfiles = []
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for value_file in file_overrides:
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# For values passed in from files, write them back out to
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# temporary files.
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tmpfile = tempfile.NamedTemporaryFile(delete=False)
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tmpfile.write(value_file)
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tmpfile.close()
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tmpfiles.append(tmpfile.name)
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cmd.extend(['--values', tmpfile.name])
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for value_set in set_overrides:
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cmd.extend(['--set', value_set])
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env = os.environ.copy()
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env['KUBECONFIG'] = '/etc/kubernetes/admin.conf'
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# Make a temporary directory with a fake chart in it
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try:
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tmpdir = tempfile.mkdtemp()
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chartfile = tmpdir + '/Chart.yaml'
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with open(chartfile, 'w') as tmpchart:
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tmpchart.write('name: mychart\napiVersion: v1\n'
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'version: 0.1.0\n')
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cmd.append(tmpdir)
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# Apply changes by calling out to helm to do values merge
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# using a dummy chart.
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output = subprocess.check_output(cmd, env=env)
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# Check output for failure
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# Extract the info we want.
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values = output.split('USER-SUPPLIED VALUES:\n')[1].split(
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'\nCOMPUTED VALUES:')[0]
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except Exception:
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raise
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finally:
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os.remove(chartfile)
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os.rmdir(tmpdir)
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for tmpfile in tmpfiles:
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os.remove(tmpfile)
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return values
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@helm_context
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def generate_helm_chart_overrides(self, path, chart_name, cnamespace=None):
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"""Generate system helm chart overrides
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This method will generate system helm chart override an write them to a
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yaml file.for use with the helm command. If the namespace is provided
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only the overrides file for that specified namespace will be written.
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:param chart_name: name of a supported chart
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:param cnamespace: (optional) namespace
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"""
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if chart_name in self.chart_operators:
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namespaces = self.chart_operators[chart_name].get_namespaces()
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if cnamespace and cnamespace not in namespaces:
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LOG.exception("The %s chart does not support namespace: %s" %
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(chart_name, cnamespace))
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return
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try:
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overrides = self._get_helm_chart_overrides(
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chart_name,
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cnamespace)
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self._write_chart_overrides(path,
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chart_name,
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cnamespace,
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overrides)
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except Exception as e:
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LOG.exception("failed to create chart overrides for %s: %s" %
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(chart_name, e))
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elif chart_name:
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LOG.exception("%s chart is not supported" % chart_name)
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else:
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LOG.exception("chart name is required")
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@helm_context
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def generate_helm_application_overrides(self, path, app_name,
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mode=None,
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cnamespace=None,
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armada_format=False,
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armada_chart_info=None,
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combined=False):
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"""Create the system overrides files for a supported application
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This method will generate system helm chart overrides yaml files for a
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set of supported charts that comprise an application.. If the namespace
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is provided only the overrides files for that specified namespace will
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be written..
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:param app_name: name of the bundle of charts required to support an
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application
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:param mode: mode to control how to apply application manifest
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:param cnamespace: (optional) namespace
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:param armada_format: (optional) whether to emit in armada format
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instead of helm format (with extra header)
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:param armada_chart_info: (optional) supporting chart information
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extracted from the armada manifest which is used to influence
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overrides
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:param combined: (optional) whether to apply user overrides on top of
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system overrides
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"""
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try:
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app = self.dbapi.kube_app_get(app_name)
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except exception.KubeAppNotFound:
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LOG.exception("Application %s not found." % app_name)
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raise
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|
|
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if app_name in self.helm_system_applications:
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# Get a manifest operator to provide a single point of
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# manipulation for the chart, chart group and manifest schemas
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manifest_op = manifest.ArmadaManifestOperator()
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# Load the manifest into the operator
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armada_manifest = utils.generate_armada_manifest_filename_abs(
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utils.generate_armada_manifest_dir(app.name, app.app_version),
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app.name, app.manifest_file)
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manifest_op.load(armada_manifest)
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app_overrides = self._get_helm_application_overrides(app_name,
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cnamespace)
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for (chart_name, overrides) in iteritems(app_overrides):
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if combined:
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# The overrides at this point are the system overrides. For
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# charts with multiple namespaces, the overrides would
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# contain multiple keys, one for each namespace.
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#
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# Retrieve the user overrides of each namespace from the
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# database and merge this list of user overrides, if they
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# exist, with the system overrides. Both system and user
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# override contents are then merged based on the namespace,
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# prepended with required header and written to
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# corresponding files (<namespace>-<chart>.yaml).
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file_overrides = []
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for chart_namespace in overrides.keys():
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try:
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db_chart = self.dbapi.helm_override_get(
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app.id, chart_name, chart_namespace)
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db_user_overrides = db_chart.user_overrides
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if db_user_overrides:
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file_overrides.append(yaml.dump(
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{chart_namespace: yaml.load(db_user_overrides)}))
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except exception.HelmOverrideNotFound:
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pass
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|
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if file_overrides:
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# Use dump() instead of safe_dump() as the latter is
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# not agreeable with password regex in some overrides
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system_overrides = yaml.dump(overrides)
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file_overrides.insert(0, system_overrides)
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combined_overrides = self.merge_overrides(
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file_overrides=file_overrides)
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overrides = yaml.load(combined_overrides)
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|
|
# If armada formatting is wanted, we need to change the
|
|
# structure of the yaml file somewhat
|
|
if armada_format:
|
|
for key in overrides:
|
|
metadata_name, repo_name, chart_tarfile = \
|
|
self._get_chart_info_from_armada_chart(chart_name, key,
|
|
armada_chart_info)
|
|
new_overrides = self._add_armada_override_header(
|
|
chart_name, metadata_name, repo_name, chart_tarfile,
|
|
key, overrides[key])
|
|
overrides[key] = new_overrides
|
|
self._write_chart_overrides(path, chart_name, cnamespace, overrides)
|
|
|
|
# Update manifest docs based on the plugin directives
|
|
if chart_name in self.chart_operators:
|
|
self.chart_operators[chart_name].execute_manifest_updates(
|
|
manifest_op, app_name)
|
|
|
|
# Update the manifest based on platform conditions
|
|
manifest.platform_mode_manifest_updates(
|
|
self.dbapi, manifest_op, app_name, mode)
|
|
|
|
# Write the manifest doc overrides, a summmary file for easy --value
|
|
# generation on the apply, and a unified manifest for deletion.
|
|
manifest_op.save_overrides()
|
|
manifest_op.save_summary(path=path)
|
|
manifest_op.save_delete_manifest()
|
|
|
|
else:
|
|
# Generic applications
|
|
for chart in armada_chart_info:
|
|
try:
|
|
db_chart = self.dbapi.helm_override_get(
|
|
app.id, chart.name, chart.namespace)
|
|
except exception.HelmOverrideNotFound:
|
|
# This routine is to create helm overrides entries
|
|
# in database during application-upload so that user
|
|
# can list the supported helm chart overrides of the
|
|
# application via helm-override-list
|
|
try:
|
|
values = {
|
|
'name': chart.name,
|
|
'namespace': chart.namespace,
|
|
'app_id': app.id,
|
|
}
|
|
db_chart = self.dbapi.helm_override_create(values=values)
|
|
except Exception as e:
|
|
LOG.exception(e)
|
|
return
|
|
|
|
user_overrides = {chart.namespace: {}}
|
|
db_user_overrides = db_chart.user_overrides
|
|
if db_user_overrides:
|
|
user_overrides = yaml.load(yaml.dump(
|
|
{chart.namespace: yaml.load(db_user_overrides)}))
|
|
|
|
if armada_format:
|
|
metadata_name, repo_name, chart_tarfile =\
|
|
self._get_chart_info_from_armada_chart(chart.name, chart.namespace,
|
|
armada_chart_info)
|
|
new_overrides = self._add_armada_override_header(
|
|
chart.name, metadata_name, repo_name, chart_tarfile,
|
|
chart.namespace, user_overrides[chart.namespace])
|
|
user_overrides[chart.namespace] = new_overrides
|
|
|
|
self._write_chart_overrides(path, chart.name,
|
|
cnamespace, user_overrides)
|
|
|
|
def remove_helm_chart_overrides(self, path, chart_name, cnamespace=None):
|
|
"""Remove the overrides files for a chart"""
|
|
|
|
if chart_name in self.chart_operators:
|
|
namespaces = self.chart_operators[chart_name].get_namespaces()
|
|
|
|
filenames = []
|
|
if cnamespace and cnamespace in namespaces:
|
|
filenames.append("%s-%s.yaml" % (cnamespace, chart_name))
|
|
else:
|
|
for n in namespaces:
|
|
filenames.append("%s-%s.yaml" % (n, chart_name))
|
|
|
|
for f in filenames:
|
|
try:
|
|
self._remove_overrides(path, f)
|
|
except Exception as e:
|
|
LOG.exception("failed to remove %s overrides: %s: %s" % (
|
|
chart_name, f, e))
|
|
else:
|
|
LOG.exception("chart %s not supported for system overrides" %
|
|
chart_name)
|
|
|
|
def _write_chart_overrides(self, path, chart_name, cnamespace, overrides):
|
|
"""Write a one or more overrides files for a chart. """
|
|
|
|
def _write_file(filename, values):
|
|
try:
|
|
self._write_overrides(path, filename, values)
|
|
except Exception as e:
|
|
LOG.exception("failed to write %s overrides: %s: %s" % (
|
|
chart_name, filename, e))
|
|
|
|
if cnamespace:
|
|
_write_file("%s-%s.yaml" % (cnamespace, chart_name), overrides)
|
|
else:
|
|
for ns in overrides.keys():
|
|
_write_file("%s-%s.yaml" % (ns, chart_name), overrides[ns])
|
|
|
|
def _write_overrides(self, path, filename, overrides):
|
|
"""Write a single overrides file. """
|
|
|
|
if not os.path.isdir(path):
|
|
os.makedirs(path)
|
|
|
|
filepath = os.path.join(path, filename)
|
|
try:
|
|
fd, tmppath = tempfile.mkstemp(dir=path, prefix=filename,
|
|
text=True)
|
|
|
|
with open(tmppath, 'w') as f:
|
|
yaml.dump(overrides, f, default_flow_style=False)
|
|
os.close(fd)
|
|
os.rename(tmppath, filepath)
|
|
# Change the permission to be readable to non-root users(ie.Armada)
|
|
os.chmod(filepath, 0o644)
|
|
except Exception:
|
|
LOG.exception("failed to write overrides file: %s" % filepath)
|
|
raise
|
|
|
|
def _remove_overrides(self, path, filename):
|
|
"""Remove a single overrides file. """
|
|
|
|
filepath = os.path.join(path, filename)
|
|
try:
|
|
if os.path.exists(filepath):
|
|
os.unlink(filepath)
|
|
except Exception:
|
|
LOG.exception("failed to delete overrides file: %s" % filepath)
|
|
raise
|
|
|
|
@helm_context
|
|
def version_check(self, app_name, app_version):
|
|
"""Validate application version"""
|
|
if app_name in self.helm_system_applications:
|
|
for chart_name in self.helm_system_applications[app_name]:
|
|
if not self.chart_operators[chart_name].version_check(app_version):
|
|
LOG.info("Unsupported version reported by %s: %s %s" % (
|
|
chart_name, app_name, app_version))
|
|
return False
|
|
|
|
# Return True by default
|
|
return True
|
|
|
|
|
|
class HelmOperatorData(HelmOperator):
|
|
"""Class to allow retrieval of helm managed data"""
|
|
|
|
@helm_context
|
|
def get_keystone_auth_data(self):
|
|
keystone_operator = self.chart_operators[constants.HELM_CHART_KEYSTONE]
|
|
auth_data = {
|
|
'admin_user_name':
|
|
keystone_operator.get_admin_user_name(),
|
|
'admin_project_name':
|
|
keystone_operator.get_admin_project_name(),
|
|
'auth_host':
|
|
'keystone-api.openstack.svc.cluster.local',
|
|
'admin_user_domain':
|
|
keystone_operator.get_admin_user_domain(),
|
|
'admin_project_domain':
|
|
keystone_operator.get_admin_project_domain(),
|
|
}
|
|
return auth_data
|
|
|
|
@helm_context
|
|
def get_nova_endpoint_data(self):
|
|
nova_operator = self.chart_operators[constants.HELM_CHART_NOVA]
|
|
endpoint_data = {
|
|
'endpoint_override':
|
|
'http://nova-api.openstack.svc.cluster.local:8774',
|
|
'region_name':
|
|
nova_operator.get_region_name(),
|
|
}
|
|
return endpoint_data
|
|
|
|
@helm_context
|
|
def get_nova_oslo_messaging_data(self):
|
|
nova_operator = self.chart_operators[constants.HELM_CHART_NOVA]
|
|
endpoints_overrides = nova_operator._get_endpoints_overrides()
|
|
auth_data = {
|
|
'host':
|
|
'rabbitmq.openstack.svc.cluster.local',
|
|
'port':
|
|
5672,
|
|
'virt_host':
|
|
'nova',
|
|
'username':
|
|
endpoints_overrides['oslo_messaging']['auth']['nova']
|
|
['username'],
|
|
'password':
|
|
endpoints_overrides['oslo_messaging']['auth']['nova']
|
|
['password'],
|
|
}
|
|
return auth_data
|
|
|
|
@helm_context
|
|
def get_cinder_endpoint_data(self):
|
|
cinder_operator = self.chart_operators[constants.HELM_CHART_CINDER]
|
|
endpoint_data = {
|
|
'region_name':
|
|
cinder_operator.get_region_name(),
|
|
'service_name':
|
|
cinder_operator.get_service_name_v2(),
|
|
'service_type':
|
|
cinder_operator.get_service_type_v2(),
|
|
}
|
|
return endpoint_data
|
|
|
|
@helm_context
|
|
def get_glance_endpoint_data(self):
|
|
glance_operator = self.chart_operators[constants.HELM_CHART_GLANCE]
|
|
endpoint_data = {
|
|
'region_name':
|
|
glance_operator.get_region_name(),
|
|
'service_name':
|
|
glance_operator.get_service_name(),
|
|
'service_type':
|
|
glance_operator.get_service_type(),
|
|
}
|
|
return endpoint_data
|
|
|
|
@helm_context
|
|
def get_neutron_endpoint_data(self):
|
|
neutron_operator = self.chart_operators[constants.HELM_CHART_NEUTRON]
|
|
endpoint_data = {
|
|
'region_name':
|
|
neutron_operator.get_region_name(),
|
|
}
|
|
return endpoint_data
|
|
|
|
@helm_context
|
|
def get_heat_endpoint_data(self):
|
|
heat_operator = self.chart_operators[constants.HELM_CHART_HEAT]
|
|
endpoint_data = {
|
|
'region_name':
|
|
heat_operator.get_region_name(),
|
|
}
|
|
return endpoint_data
|
|
|
|
@helm_context
|
|
def get_ceilometer_endpoint_data(self):
|
|
ceilometer_operator = \
|
|
self.chart_operators[constants.HELM_CHART_CEILOMETER]
|
|
endpoint_data = {
|
|
'region_name':
|
|
ceilometer_operator.get_region_name(),
|
|
}
|
|
return endpoint_data
|