Create experimental Neutron DVR+HA multinode job

Adding a three node label to nodepool as we need a three node
setup to test DVR+HA with tempest.
Existing Devstack gate will set agent_mode to 'dvr' in both compute
nodes. So it is still a DVR only multinode setup with 3 nodes.
Change[1] in devstack gate submitted to change one compute node's
agent_mode to dvr_snat, to make it DVR+HA.

[1] https://review.openstack.org/#/c/383827/

Change-Id: I370643277a3b23e7f47e413cf880daa9af1eb831

jenkins/jobs/neutron.yaml

@@ -160,6 +160,43 @@
       - devstack-logs
       - console-log
 
+- job-template:
+    name: '{pipeline}-tempest-dsvm-neutron-dvr-ha-multinode-full-{node-release}{job-suffix}'
+    node: '{node}'
+
+    wrappers:
+      - build-timeout:
+          timeout: 180
+      - timestamps
+
+    builders:
+      - print-template-name:
+          template-name: "{template-name}"
+      - link-logs
+      - net-info
+      - devstack-checkout
+      - shell: |
+          #!/bin/bash -xe
+          export PYTHONUNBUFFERED=true
+          export DEVSTACK_GATE_TEMPEST=1
+          export DEVSTACK_GATE_NEUTRON=1
+          export DEVSTACK_GATE_CONFIGDRIVE=0
+          export DEVSTACK_GATE_TEMPEST_FULL=1
+          # Test DVR works multinode
+          export DEVSTACK_GATE_NEUTRON_DVR=1
+          export BRANCH_OVERRIDE={branch-override}
+          if [ "$BRANCH_OVERRIDE" != "default" ] ; then
+              export OVERRIDE_ZUUL_BRANCH=$BRANCH_OVERRIDE
+          fi
+          export DEVSTACK_GATE_TOPOLOGY="multinode"
+
+          cp devstack-gate/devstack-vm-gate-wrap.sh ./safe-devstack-vm-gate-wrap.sh
+          ./safe-devstack-vm-gate-wrap.sh
+
+    publishers:
+      - devstack-logs
+      - console-log
+
 - job-template:
     name: '{pipeline}-neutron-dsvm-functional{python}-{node}{job-suffix}'
     node: '{node}'

jenkins/jobs/projects.yaml

@@ -3846,6 +3846,12 @@
           node: ubuntu-xenial-2-node
           job-suffix: '-nv'
           branch-override: default
+      - '{pipeline}-tempest-dsvm-neutron-dvr-ha-multinode-full-{node-release}{job-suffix}':
+          pipeline: gate
+          node-release: ubuntu-xenial
+          node: ubuntu-xenial-3-node
+          job-suffix: '-nv'
+          branch-override: default
       - '{pipeline}-tempest-dsvm-multinode-live-migration-{node-release}{job-suffix}':
           pipeline: gate
           node-release: ubuntu-xenial

nodepool/nodepool.yaml

@@ -125,6 +125,23 @@ labels:
       - name: osic-cloud1-disk
       - name: infracloud-vanilla
       - name: infracloud-chocolate
+  - name: ubuntu-xenial-3-node
+    image: ubuntu-xenial
+    ready-script: multinode_setup.sh
+    subnodes: 2
+    min-ready: 1
+    providers:
+      - name: rax-dfw
+      - name: rax-ord
+      - name: rax-iad
+      - name: ovh-gra1
+      - name: bluebox-sjc1
+      - name: internap-mtl01
+      - name: osic-cloud1-s3500
+      - name: osic-cloud1-s3700
+      - name: osic-cloud1-disk
+      - name: infracloud-vanilla
+      - name: infracloud-chocolate
   - name: centos-7
     image: centos-7
     ready-script: configure_mirror.sh

zuul/layout.yaml

@@ -12256,6 +12256,7 @@ projects:
       - gate-tempest-dsvm-neutron-pg-full-ubuntu-trusty
       - gate-tempest-dsvm-neutron-pg-full-ubuntu-xenial
       - gate-tempest-dsvm-neutron-dvr-multinode-full-centos-7-nv
+      - gate-tempest-dsvm-neutron-dvr-ha-multinode-full-ubuntu-xenial-nv
 
   - name: openstack/neutron-classifier
     template: