openstack/puppet-watcher
Code Issues Proposed changes

Add WSGI support for `watcher-api'

Browse Source 
Adds support to run watcher-api with mod-wsgi[0].

[0]https://review.openstack.org/#/c/450740/

Change-Id: Ie6bbde98bee19ccc4a938bba28b66b759ccd3307
Implements: blueprint wsgi-support
This commit is contained in:
ZhongShengping 2017-08-15 10:16:22 +08:00
parent ae4c0865bb
commit 9d2a0fb198
7 changed files with 322 additions and 14 deletions
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31
manifests/api.pp
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@ -101,6 +101,15 @@
# (Optional) Authentication type to load.
# Defaults to undef
#
# [*service_name*]
# (optional) Name of the service that will be providing the
# server functionality of watcher-api.
# If the value is 'httpd', this means watcher-api will be a web
# service, and you must use another class to configure that
# web service. For example, use class { 'watcher::wsgi::apache'...}
# to make watcher-api be a web app using apache mod_wsgi.
# Defaults to '$::watcher::params::api_service_name'
#
# === Watcher API service validation
#
# [*validation_options*]
@ -149,12 +158,12 @@ class watcher::api (
$watcher_client_keyfile = $::os_service_default,
$watcher_client_auth_type = 'password',
$validation_options = {},
$service_name = $::watcher::params::api_service_name,
$create_db_schema = false,
$upgrade_db = false,
$auth_strategy = 'keystone',
) {
) inherits watcher::params {
include ::watcher::params
include ::watcher::policy
include ::watcher::deps
@ -186,6 +195,7 @@ class watcher::api (
include ::watcher::db::upgrade
}
if $service_name == $::watcher::params::api_service_name {
# NOTE(danpawlik) Watcher doesn't support db_sync command.
service { 'watcher-api':
ensure => $service_ensure,
@ -197,6 +207,23 @@ class watcher::api (
'watcher-db-manage-create_schema',
'watcher-db-manage-upgrade'],
}
} elsif $service_name == 'httpd' {
include ::apache::params
service { 'watcher-api':
ensure => 'stopped',
name => $::watcher::params::api_service_name,
enable => false,
tag => [ 'watcher-service',
'watcher-db-manage-create_schema',
'watcher-db-manage-upgrade'],
}
# we need to make sure watcher-api/eventlet is stopped before trying to start apache
Service['watcher-api'] -> Service[$service_name]
} else {
fail("Invalid service_name. Either watcher/openstack-watcher-api for running \
as a standalone service, or httpd for being run by a httpd server")
}
if $enabled {
watcher_config {

4
manifests/params.pp
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@ -13,6 +13,8 @@ class watcher::params {
$decision_engine_package_name = 'openstack-watcher-decision-engine'
$decision_engine_service_name = 'openstack-watcher-decision-engine'
$client_package_name = undef
$watcher_wsgi_script_source = '/usr/lib/python2.7/site-packages/watcher/api/app.wsgi'
$watcher_wsgi_script_path = '/var/www/cgi-bin/watcher'
}
'Debian': {
$api_service_name = 'watcher-api'
@ -23,6 +25,8 @@ class watcher::params {
$decision_engine_package_name = 'watcher-decision-engine'
$decision_engine_service_name = 'watcher-decision-engine'
$client_package_name = 'python-watcherclient'
$watcher_wsgi_script_source = '/usr/lib/python2.7/dist-packages/watcher/api/app.wsgi'
$watcher_wsgi_script_path = '/usr/lib/cgi-bin/watcher'
}
default: {
fail("Unsupported osfamily: ${::osfamily} operatingsystem")

132
manifests/wsgi/apache.pp Normal file
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@ -0,0 +1,132 @@
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
# Class to serve Cinder API with apache mod_wsgi in place of watcher service.
#
# Serving Cinder API from apache is the recommended way to go for production
# because of limited performance for concurrent accesses when running eventlet.
#
# When using this class you should disable your watcher service.
#
# == Parameters
#
# [*servername*]
# The servername for the virtualhost.
# Optional. Defaults to $::fqdn
#
# [*port*]
# The port.
# Optional. Defaults to 9322
#
# [*bind_host*]
# The host/ip address Apache will listen on.
# Optional. Defaults to undef (listen on all ip addresses).
#
# [*path*]
# The prefix for the endpoint.
# Optional. Defaults to '/'
#
# [*ssl*]
# Use ssl ? (boolean)
# Optional. Defaults to true
#
# [*workers*]
# Number of WSGI workers to spawn.
# Optional. Defaults to 1
#
# [*priority*]
# (optional) The priority for the vhost.
# Defaults to '10'
#
# [*threads*]
# (optional) The number of threads for the vhost.
# Defaults to $::os_workers
#
# [*wsgi_process_display_name*]
# (optional) Name of the WSGI process display-name.
# Defaults to undef
#
# [*ssl_cert*]
# [*ssl_key*]
# [*ssl_chain*]
# [*ssl_ca*]
# [*ssl_crl_path*]
# [*ssl_crl*]
# [*ssl_certs_dir*]
# apache::vhost ssl parameters.
# Optional. Default to apache::vhost 'ssl_*' defaults.
#
# == Dependencies
#
# requires Class['apache'] & Class['watcher']
#
# == Examples
#
# include apache
#
# class { 'watcher::wsgi::apache': }
#
class watcher::wsgi::apache (
$servername = $::fqdn,
$port = 9322,
$bind_host = undef,
$path = '/',
$ssl = true,
$workers = 1,
$ssl_cert = undef,
$ssl_key = undef,
$ssl_chain = undef,
$ssl_ca = undef,
$ssl_crl_path = undef,
$ssl_crl = undef,
$ssl_certs_dir = undef,
$wsgi_process_display_name = undef,
$threads = $::os_workers,
$priority = '10',
) {
include ::watcher::deps
include ::watcher::params
include ::apache
include ::apache::mod::wsgi
if $ssl {
include ::apache::mod::ssl
}
::openstacklib::wsgi::apache { 'watcher_wsgi':
bind_host => $bind_host,
bind_port => $port,
group => 'watcher',
path => $path,
priority => $priority,
servername => $servername,
ssl => $ssl,
ssl_ca => $ssl_ca,
ssl_cert => $ssl_cert,
ssl_certs_dir => $ssl_certs_dir,
ssl_chain => $ssl_chain,
ssl_crl => $ssl_crl,
ssl_crl_path => $ssl_crl_path,
ssl_key => $ssl_key,
threads => $threads,
user => 'watcher',
workers => $workers,
wsgi_daemon_process => 'watcher',
wsgi_process_display_name => $wsgi_process_display_name,
wsgi_process_group => 'watcher',
wsgi_script_dir => $::watcher::params::watcher_wsgi_script_path,
wsgi_script_file => 'app',
wsgi_script_source => $::watcher::params::watcher_wsgi_script_source,
require => Anchor['watcher::install::end'],
}
}

3
releasenotes/notes/add_wsgi_support-98135d2375f323e8.yaml Normal file
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@ -0,0 +1,3 @@
---
features:
- Add support to run watcher-api with mod-wsgi.

5
spec/acceptance/watcher_spec.rb → spec/acceptance/watcher_wsgi_apache_spec.rb
View File

@ -49,10 +49,15 @@ describe 'basic watcher' do
default_transport_url => 'rabbit://watcher:my_secret@127.0.0.1:5672/',
}
class { '::watcher::api':
service_name => 'httpd',
watcher_client_password => 'a_big_secret',
create_db_schema => true,
upgrade_db => true,
}
include ::apache
class { '::watcher::wsgi::apache':
ssl => false,
}
class { '::watcher::applier':
applier_workers => '2',
}

44
spec/classes/watcher_api_spec.rb
View File

@ -135,6 +135,50 @@ describe 'watcher::api' do
is_expected.to contain_watcher_config('watcher_clients_auth/keyfile').with_value( params[:watcher_client_keyfile] )
end
end
context 'when running watcher-api in wsgi' do
before do
params.merge!({ :service_name => 'httpd' })
end
let :pre_condition do
"include ::apache
include ::watcher::db
class { 'watcher': }
class { '::watcher::keystone::authtoken':
password => 'a_big_secret',
}"
end
it 'configures watcher-api service with Apache' do
is_expected.to contain_service('watcher-api').with(
:ensure => 'stopped',
:name => platform_params[:api_service_name],
:enable => false,
:tag => ['watcher-service',
'watcher-db-manage-create_schema',
'watcher-db-manage-upgrade'],
)
end
end
context 'when service_name is not valid' do
before do
params.merge!({ :service_name => 'foobar' })
end
let :pre_condition do
"include ::apache
include ::watcher::db
class { 'watcher': }
class { '::watcher::keystone::authtoken':
password => 'a_big_secret',
}"
end
it_raises 'a Puppet::Error', /Invalid service_name/
end
end
on_supported_os({

93
spec/classes/watcher_wsgi_apache_spec.rb Normal file
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@ -0,0 +1,93 @@
require 'spec_helper'
describe 'watcher::wsgi::apache' do
shared_examples_for 'apache serving watcher with mod_wsgi' do
context 'with default parameters' do
it { is_expected.to contain_class('watcher::params') }
it { is_expected.to contain_class('apache') }
it { is_expected.to contain_class('apache::mod::wsgi') }
it { is_expected.to contain_class('apache::mod::ssl') }
it { is_expected.to contain_openstacklib__wsgi__apache('watcher_wsgi').with(
:bind_port => 9322,
:group => 'watcher',
:path => '/',
:servername => facts[:fqdn],
:ssl => true,
:threads => facts[:os_workers],
:user => 'watcher',
:workers => 1,
:wsgi_daemon_process => 'watcher',
:wsgi_process_group => 'watcher',
:wsgi_script_dir => platform_params[:wsgi_script_path],
:wsgi_script_file => 'app',
:wsgi_script_source => platform_params[:wsgi_script_source],
)}
end
context 'when overriding parameters using different ports' do
let :params do
{
:servername => 'dummy.host',
:bind_host => '10.42.51.1',
:port => 12345,
:ssl => false,
:wsgi_process_display_name => 'watcher',
:workers => 37,
}
end
it { is_expected.to contain_class('watcher::params') }
it { is_expected.to contain_class('apache') }
it { is_expected.to contain_class('apache::mod::wsgi') }
it { is_expected.to_not contain_class('apache::mod::ssl') }
it { is_expected.to contain_openstacklib__wsgi__apache('watcher_wsgi').with(
:bind_host => '10.42.51.1',
:bind_port => 12345,
:group => 'watcher',
:path => '/',
:servername => 'dummy.host',
:ssl => false,
:threads => facts[:os_workers],
:user => 'watcher',
:workers => 37,
:wsgi_daemon_process => 'watcher',
:wsgi_process_display_name => 'watcher',
:wsgi_process_group => 'watcher',
:wsgi_script_dir => platform_params[:wsgi_script_path],
:wsgi_script_file => 'app',
:wsgi_script_source => platform_params[:wsgi_script_source],
)}
end
end
on_supported_os({
:supported_os => OSDefaults.get_supported_os
}).each do |os,facts|
context "on #{os}" do
let (:facts) do
facts.merge!(OSDefaults.get_facts({
:os_workers => 42,
:concat_basedir => '/var/lib/puppet/concat',
:fqdn => 'some.host.tld',
}))
end
let(:platform_params) do
case facts[:osfamily]
when 'Debian'
{
:wsgi_script_path => '/usr/lib/cgi-bin/watcher',
:wsgi_script_source => '/usr/lib/python2.7/dist-packages/watcher/api/app.wsgi'
}
when 'RedHat'
{
:wsgi_script_path => '/var/www/cgi-bin/watcher',
:wsgi_script_source => '/usr/lib/python2.7/site-packages/watcher/api/app.wsgi'
}
end
end
it_behaves_like 'apache serving watcher with mod_wsgi'
end
end
end