Added availability zone hints

Neutron in mitaka supports availability zone hints. Support
has been added by providing a means to update neutron server,
l3 agent, and dhcp agent for this feature. The neutron_network
and neutron_router provider has been updated to support
availability zone hints.

Change-Id: I99c6c36d7354aec5176589a95e8e7f0ea1dfede7
Closes-Bug: 1569686

lib/puppet/provider/neutron_network/neutron.rb

@@ -41,7 +41,8 @@ Puppet::Type.type(:neutron_network).provide(
         :provider_segmentation_id  => attrs['provider:segmentation_id'],
         :router_external           => attrs['router:external'],
         :shared                    => attrs['shared'],
-        :tenant_id                 => attrs['tenant_id']
+        :tenant_id                 => attrs['tenant_id'],
+        :availability_zone_hint    => attrs['availability_zone_hint']
       )
     end
     self.do_not_manage = false
@@ -99,6 +100,11 @@ Puppet::Type.type(:neutron_network).provide(
       network_opts << '--router:external'
     end
 
+    if @resource[:availability_zone_hint]
+      network_opts << \
+        "--availability-zone-hint=#{@resource[:availability_zone_hint]}"
+    end
+
     results = auth_neutron('net-create', '--format=shell',
                            network_opts, resource[:name])
 
@@ -114,6 +120,7 @@ Puppet::Type.type(:neutron_network).provide(
       :router_external           => attrs['router:external'],
       :shared                    => attrs['shared'],
       :tenant_id                 => attrs['tenant_id'],
+      :availability_zone_hint    => attrs['availability_zone_hint']
     }
   end
 
@@ -150,6 +157,13 @@ Puppet::Type.type(:neutron_network).provide(
     end
   end
 
+  def availability_zone_hint=(value)
+    if self.class.do_not_manage
+      fail("Not managing Neutron_network[#{@resource[:name]}] due to earlier Neutron API failures.")
+    end
+    auth_neutron('net-update', "--availability-zone-hint=#{value}", name)
+  end
+
   [
    :provider_network_type,
    :provider_physical_network,

lib/puppet/provider/neutron_router/neutron.rb

@@ -36,7 +36,8 @@ Puppet::Type.type(:neutron_router).provide(
         :status                    => attrs['status'],
         :distributed               => attrs['distributed'],
         :ha                        => attrs['ha'],
-        :tenant_id                 => attrs['tenant_id']
+        :tenant_id                 => attrs['tenant_id'],
+        :availability_zone_hint    => attrs['availability_zone_hint']
       )
     end
     self.do_not_manage = false
@@ -83,6 +84,10 @@ Puppet::Type.type(:neutron_router).provide(
       opts << "--ha=#{@resource[:ha]}"
     end
 
+    if @resource[:availability_zone_hint]
+      opts << "--availability-zone-hint=#{@resource[:availability_zone_hint]}"
+    end
+
     results = auth_neutron("router-create", '--format=shell',
                            opts, resource[:name])
 
@@ -95,6 +100,7 @@ Puppet::Type.type(:neutron_router).provide(
       :external_gateway_info     => attrs['external_gateway_info'],
       :status                    => attrs['status'],
       :tenant_id                 => attrs['tenant_id'],
+      :availability_zone_hint    => attrs['availability_zone_hint']
     }
 
     if @resource[:gateway_network_name]
@@ -188,4 +194,16 @@ Puppet::Type.type(:neutron_router).provide(
     end
   end
 
+  def availability_zone_hint=(value)
+    if self.class.do_not_manage
+      fail("Not managing Neutron_router[#{@resource[:name]}] due to earlier Neutron API failures.")
+    end
+    results = auth_neutron("router-show", '--format=shell', resource[:name])
+    attrs = self.class.parse_creation_output(results)
+    set_admin_state_up(false)
+    auth_neutron('router-update', "--availability-zone-hint=#{value}", name)
+    if attrs['admin_state_up'] == 'True'
+      set_admin_state_up(true)
+    end
+  end
 end

lib/puppet/type/neutron_network.rb

@@ -69,6 +69,10 @@ Puppet::Type.newtype(:neutron_network) do
     end
   end
 
+  newproperty(:availability_zone_hint) do
+    desc 'The availability zone hint to provide the scheduler'
+  end
+
   # Require the neutron-server service to be running
   autorequire(:service) do
     ['neutron-server']

lib/puppet/type/neutron_router.rb

@@ -92,6 +92,10 @@ Puppet::Type.newtype(:neutron_router) do
     end
   end
 
+  newproperty(:availability_zone_hint) do
+    desc 'The availability zone hint to provide the scheduler'
+  end
+
   validate do
     if self[:ensure] != :present
       return

manifests/agents/dhcp.pp

@@ -69,6 +69,11 @@
 #   in the dhcp config.
 #   Defaults to false.
 #
+# [*availability_zone*]
+#   (optional) The availability zone of the agent.
+#   Neutron will only schedule dhcp on the agent based on availability zone
+#   Defaults to $::os_service_default
+#
 # === Deprecated Parameters
 #
 # [*dhcp_domain*]
@@ -92,6 +97,7 @@ class neutron::agents::dhcp (
   $enable_metadata_network  = false,
   $dhcp_broadcast_reply     = $::os_service_default,
   $purge_config             = false,
+  $availability_zone        = $::os_service_default,
   # DEPRECATED PARAMETERS
   $dhcp_domain              = $::os_service_default,
 ) {
@@ -142,6 +148,7 @@ class neutron::agents::dhcp (
     'DEFAULT/dhcp_broadcast_reply':   value => $dhcp_broadcast_reply;
     'DEFAULT/dnsmasq_config_file':    value => $dnsmasq_config_file;
     'DEFAULT/dnsmasq_dns_servers':    value => join(any2array($dnsmasq_dns_servers), ',');
+    'AGENT/availability_zone':        value => $availability_zone;
   }
 
   if ! is_service_default ($dhcp_domain) {

manifests/agents/l3.pp

@@ -83,6 +83,11 @@
 #   in the l3 config.
 #   Defaults to false.
 #
+# [*availability_zone*]
+#   (optional) The availability zone of the agent.
+#   Neutron will only schedule routers on the agent based on availability zone
+#   Defaults to $::os_service_default
+#
 # === Deprecated Parameters
 #
 # [*external_network_bridge*]
@@ -112,6 +117,7 @@ class neutron::agents::l3 (
   $ha_vrrp_advert_int               = '3',
   $agent_mode                       = 'legacy',
   $purge_config                     = false,
+  $availability_zone                = $::os_service_default,
   # DEPRECATED PARAMETERS
   $external_network_bridge          = $::os_service_default,
   $router_id                        = $::os_service_default,
@@ -152,6 +158,7 @@ class neutron::agents::l3 (
     'DEFAULT/periodic_fuzzy_delay':             value => $periodic_fuzzy_delay;
     'DEFAULT/enable_metadata_proxy':            value => $enable_metadata_proxy;
     'DEFAULT/agent_mode':                       value => $agent_mode;
+    'AGENT/availability_zone':                  value => $availability_zone;
   }
 
   if $::neutron::params::l3_agent_package {

manifests/server.pp

@@ -154,10 +154,22 @@
 # [*lock_path*]
 #   (optional) Deprecated.  Use lock_path parameter on base neutron class instead.
 #
+# [*network_scheduler_driver*]
+#   (optional) The scheduler used when scheduling networks
+#   neutron.scheduler.dhcp_agent_scheduler.AZAwareWeightScheduler to use availability zone hints scheduling.
+#   Defaults to $::os_service_default
+#
+#   Example:
+#
+#     class { 'neutron':
+#       network_scheduler_driver => 'neutron.scheduler.dhcp_agent_scheduler.AZAwareWeightScheduler'
+#     }
+#
 # [*router_scheduler_driver*]
 #   (optional) Driver to use for scheduling router to a default L3 agent. Could be:
 #   neutron.scheduler.l3_agent_scheduler.ChanceScheduler to schedule a router in a random way
 #   neutron.scheduler.l3_agent_scheduler.LeastRoutersScheduler to allocate on an L3 agent with the least number of routers bound.
+#   neutron.scheduler.l3_agent_scheduler.AZLeastRoutersScheduler to use availability zone hints.
 #   Defaults to: neutron.scheduler.l3_agent_scheduler.ChanceScheduler
 #
 # [*router_distributed*]
@@ -166,6 +178,28 @@
 #   Also can be the type of the router on the create request (admin-only attribute).
 #   Defaults to $::os_service_default
 #
+# [*dhcp_load_type*]
+#   (optional) The resource type whos load is being reported by the agent.
+#   The expected values are either 'networks', 'subnets', 'ports'.
+#   Defaults to $::os_service_default
+#
+#   Example:
+#
+#     class { 'neutron':
+#       dhcp_load_type => 'networks'
+#     }
+#
+# [*default_availability_zones*]
+#   (optional) A list of availability zones that are picked when availability zone is not specified
+#   The expected input is an array when specified.
+#   Defaults to $::os_service_default
+#
+#   Example:
+#
+#     class { 'neutron':
+#       default_availability_zones => ['zone1', 'zone2']
+#     }
+#
 # [*allow_automatic_l3agent_failover*]
 #   (optional) Allow automatic rescheduling of routers from dead L3 agents with
 #   admin_state_up set to True to alive agents.
@@ -281,6 +315,9 @@ class neutron::server (
   $agent_down_time                  = $::os_service_default,
   $router_scheduler_driver          = 'neutron.scheduler.l3_agent_scheduler.ChanceScheduler',
   $router_distributed               = $::os_service_default,
+  $network_scheduler_driver         = $::os_service_default,
+  $dhcp_load_type                   = $::os_service_default,
+  $default_availability_zones       = $::os_service_default,
   $allow_automatic_l3agent_failover = $::os_service_default,
   $l3_ha                            = false,
   $max_l3_agents_per_router         = 3,
@@ -311,6 +348,14 @@ class neutron::server (
   # Work-around LP#1551974. neutron requires the keystoneclient to auth tokens
   include ::keystone::client
 
+  if !is_service_default($default_availability_zones) {
+    validate_array($default_availability_zones)
+  }
+
+  if !is_service_default($dhcp_load_type) {
+    validate_re($dhcp_load_type, ['^networks$', '^subnets$', '^ports$'], 'Must pass either networks, subnets, or ports as values for dhcp_load_type')
+  }
+
   if $ensure_fwaas_package {
     if ($::osfamily == 'Debian') {
       # Debian platforms
@@ -391,6 +436,9 @@ class neutron::server (
     'DEFAULT/router_scheduler_driver':          value => $router_scheduler_driver;
     'DEFAULT/router_distributed':               value => $router_distributed;
     'DEFAULT/allow_automatic_l3agent_failover': value => $allow_automatic_l3agent_failover;
+    'DEFAULT/network_scheduler_driver':         value => $network_scheduler_driver;
+    'DEFAULT/dhcp_load_type':                   value => $dhcp_load_type;
+    'DEFAULT/default_availability_zones':       value => join(any2array($default_availability_zones), ',');
   }
 
   if $state_path {

releasenotes/notes/neutron_availability_zones-80246c2af9a7be08.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - Added the configuration options to configure neutron availability zones
+    for server and agents.
+  - Providers updated to being able to configure router/network with availability
+    zone.

spec/classes/neutron_agents_dhcp_spec.rb

@@ -50,6 +50,7 @@ describe 'neutron::agents::dhcp' do
       is_expected.to contain_neutron_dhcp_agent_config('DEFAULT/force_metadata').with_value('<SERVICE DEFAULT>');
       is_expected.to contain_neutron_dhcp_agent_config('DEFAULT/enable_metadata_network').with_value(p[:enable_metadata_network]);
       is_expected.to contain_neutron_dhcp_agent_config('DEFAULT/dhcp_broadcast_reply').with_value('<SERVICE DEFAULT>');
+      is_expected.to contain_neutron_dhcp_agent_config('AGENT/availability_zone').with_value('<SERVICE DEFAULT>');
     end
 
     it 'installs neutron dhcp agent package' do
@@ -140,6 +141,15 @@ describe 'neutron::agents::dhcp' do
         is_expected.to contain_neutron_dhcp_agent_config('DEFAULT/enable_metadata_network').with_value('true');
       end
     end
+
+    context 'when availability zone is set' do
+      before :each do
+        params.merge!(:availability_zone => 'zone1')
+      end
+      it 'should configure availability zone' do
+        is_expected.to contain_neutron_dhcp_agent_config('AGENT/availability_zone').with_value(p[:availability_zone]);
+      end
+    end
   end
 
   shared_examples_for 'neutron dhcp agent with dnsmasq_config_file specified' do

spec/classes/neutron_agents_l3_spec.rb

@@ -47,6 +47,7 @@ describe 'neutron::agents::l3' do
       is_expected.to contain_neutron_l3_agent_config('DEFAULT/periodic_interval').with_value('<SERVICE DEFAULT>')
       is_expected.to contain_neutron_l3_agent_config('DEFAULT/periodic_fuzzy_delay').with_value('<SERVICE DEFAULT>')
       is_expected.to contain_neutron_l3_agent_config('DEFAULT/enable_metadata_proxy').with_value('<SERVICE DEFAULT>')
+      is_expected.to contain_neutron_l3_agent_config('AGENT/availability_zone').with_value('<SERVICE DEFAULT>')
     end
 
     it 'passes purge to resource' do
@@ -105,6 +106,16 @@ describe 'neutron::agents::l3' do
         is_expected.to contain_neutron_l3_agent_config('DEFAULT/ha_vrrp_advert_int').with_value(p[:ha_vrrp_advert_int])
       end
     end
+
+    context 'with availability zone' do
+      before :each do
+        params.merge!(:availability_zone => 'zone1')
+      end
+
+      it 'configures availability zone' do
+        is_expected.to contain_neutron_l3_agent_config('AGENT/availability_zone').with_value(p[:availability_zone])
+      end
+    end
   end
 
   context 'on Debian platforms' do

spec/classes/neutron_server_spec.rb

@@ -200,6 +200,32 @@ describe 'neutron::server' do
         is_expected.not_to contain_neutron_config('keystone_authtoken/auth_type')
       end
     end
+
+    context 'with a bad dhcp_load_type value' do
+      before :each do
+        params.merge!(:dhcp_load_type => 'badvalue')
+      end
+
+      it_raises 'a Puppet::Error', /Must pass either networks, subnets, or ports as values for dhcp_load_type/
+    end
+
+    context 'with availability zone hints set' do
+      before :each do
+        params.merge!(:dhcp_load_type             => 'networks',
+                      :router_scheduler_driver    => 'neutron.scheduler.l3_agent_scheduler.AZLeastRoutersScheduler',
+                      :network_scheduler_driver   => 'neutron.scheduler.dhcp_agent_scheduler.AZAwareWeightScheduler',
+                      :default_availability_zones => ['zone1', 'zone2']
+        )
+      end
+
+      it 'should configure neutron server for availability zones' do
+        is_expected.to contain_neutron_config('DEFAULT/default_availability_zones').with_value('zone1,zone2')
+        is_expected.to contain_neutron_config('DEFAULT/router_scheduler_driver').with_value('neutron.scheduler.l3_agent_scheduler.AZLeastRoutersScheduler')
+        is_expected.to contain_neutron_config('DEFAULT/network_scheduler_driver').with_value('neutron.scheduler.dhcp_agent_scheduler.AZAwareWeightScheduler')
+        is_expected.to contain_neutron_config('DEFAULT/dhcp_load_type').with_value('networks')
+      end
+
+    end
   end
 
   shared_examples_for 'a neutron server with broken authentication' do

spec/unit/provider/neutron_router/neutron_spec.rb

@@ -19,6 +19,7 @@ describe provider_class do
       :distributed            => 'True',
       :ha                     => 'False',
       :tenant_id              => '60f9544eb94c42a6b7e8e98c2be981b1',
+      :availability_zone_hint => 'zone1',
     }
   end
 
@@ -43,12 +44,14 @@ name="router1"
 status="ACTIVE"
 distributed="True"
 ha="False"
-tenant_id="60f9544eb94c42a6b7e8e98c2be981b1"'
+tenant_id="60f9544eb94c42a6b7e8e98c2be981b1"
+availability-zone-hint="zone1"'
 
       provider.expects(:auth_neutron).with('router-create',
                                            '--format=shell', ["--tenant_id=#{router_attrs[:tenant_id]}",
                                                               "--distributed=#{router_attrs[:distributed]}",
-                                                              "--ha=#{router_attrs[:ha]}"],
+                                                              "--ha=#{router_attrs[:ha]}",
+                                                              "--availability-zone-hint=#{router_attrs[:availability_zone_hint]}"],
                                            router_name).returns(output)
 
       provider.create