Define devstack services without the test-matrix

Emit a disable_all_services and define which service we run in
the job directly. This drops the dependency from the test matrix,
from devstack default list of services and it makes it easier for
jobs to add/remove services based on the list in the base job.

Change-Id: Ib1debefd541b933dbfc54d484c263cc0ed60423d

.zuul.yaml

@@ -76,6 +76,8 @@
         # from the location below for all the CI jobs.
         ETCD_DOWNLOAD_URL: http://tarballs.openstack.org/etcd/
       devstack_services:
+        # Ignore base set of services setup by test-matrix.
+        # Ignore any default set by devstack. Emit a "disable_all_services".
         base: false
       zuul_copy_output:
         '{{ devstack_conf_dir }}/local.conf': 'logs'
@@ -154,7 +156,7 @@
     name: devstack
     parent: devstack-base
     description: |
-      Single node devstack job for integration gate.
+      Single or multi node devstack job for integration gate.
     nodeset: openstack-single-node
     required-projects:
       - openstack/cinder
@@ -166,7 +168,6 @@
       - openstack/swift
     timeout: 7200
     vars:
-      test_matrix_configs: [neutron, tlsproxy]
       devstack_localrc:
         # Common OpenStack services settings
         SWIFT_REPLICAS: 1
@@ -178,9 +179,81 @@
         VNCSERVER_LISTEN: 0.0.0.0
         VNCSERVER_PROXYCLIENT_ADDRESS: "{{ hostvars[inventory_hostname]['nodepool']['private_ipv4'] }}"
       devstack_services:
-        base: true
+        # Core services enabled for this branch.
+        # This list replaces the test-matrix.
+        # Shared services
+        dstat: true
+        etcd3: true
+        mysql: true
+        peakmem_tracker: true
+        rabbit: true
+        tls-proxy: true
+        # Keystone services
+        key: true
+        # Glance services
+        g-api: true
+        g-reg: true
+        # Nova services
+        n-api: true
+        n-api-meta: true
+        n-cauth: true
+        n-cond: true
+        n-cpu: true
+        n-novnc: true
+        n-obj: true
+        n-sch: true
+        placement-api: true
+        # Neutron services
+        neutron-api: true
+        neutron-agent: true
+        neutron-dhcp: true
+        neutron-l3: true
+        neutron-metadata-agent: true
+        neutron-metering: true
+        # Swift services
+        s-account: true
+        s-container: true
+        s-object: true
+        s-proxy: true
+        # Cinder services
+        c-api: true
+        c-bak: true
+        c-sch: true
+        c-vol: true
+        cinder: true
+        # Services we don't need.
+        # This section is not really needed, it's for readability.
         horizon: false
         tempest: false
+        # Test matrix emits ceilometer but ceilomenter is not installed in the
+        # integrated gate, so specifying the services has not effect.
+        # ceilometer-*: false
+    group-vars:
+      subnode:
+        devstack_services:
+          # Core services enabled for this branch.
+          # This list replaces the test-matrix.
+          # Shared services
+          dstat: true
+          peakmem_tracker: true
+          tls-proxy: true
+          # Nova services
+          n-cpu: true
+          placement-client: true
+          # Neutron services
+          neutron-agent: true
+          # Cinder services
+          c-bak: true
+          c-vol: true
+          # Services we don't run at all on subnode.
+          # This section is not really needed, it's for readability.
+          # keystone: false
+          # s-*: false
+          horizon: false
+          tempest: false
+          # Test matrix emits ceilometer but ceilomenter is not installed in the
+          # integrated gate, so specifying the services has not effect.
+          # ceilometer-*: false
 
 - job:
     name: devstack-multinode