Add placement perf info gathering hook to end of nova-next

This change adds a post test hook to the nova-next job to report
timing of a query to GET /allocation_candidates when there are 1000
resource providers with the same inventory.

A summary of the work ends up in logs/placement-perf.txt

Change-Id: Idc446347cd8773f579b23c96235348d8e10ea3f6

gate/post_test_perf_check.sh

@@ -0,0 +1,57 @@
+#!/bin/bash -x
+
+# Do some performance related information gathering for placement.
+
+# This aggregate uuid is a static value in placeload.
+AGGREGATE="14a5c8a3-5a99-4e8f-88be-00d85fcb1c17"
+PLACEMENT_QUERY="resources=VCPU:1,DISK_GB:10,MEMORY_MB:256&member_of=${AGGREGATE}"
+
+BASE=${BASE:-/opt/stack}
+source ${BASE}/new/devstack/functions
+source ${BASE}/new/devstack/lib/nova
+source ${BASE}/new/devstack/lib/placement
+# Putting the log here ought to mean it is automatically gathered by zuul
+LOG=${BASE}/logs/placement-perf.txt
+COUNT=1000
+
+function check_placement {
+    local placement_url
+    local rp_count
+
+    python -m virtualenv -p python3 .placeload
+    . .placeload/bin/activate
+
+    # install placeload
+    pip install placeload
+
+    # Turn off keystone auth
+    iniset -sudo $NOVA_CONF DEFAULT auth_strategy noauth2
+    restart_service devstack@placement-api
+
+    # get placement endpoint
+    placement_url=$(get_endpoint_url placement public)
+
+    # load with placeload
+    placeload $placement_url $COUNT | tee -a $LOG
+    rp_count=$(curl -H 'x-auth-token: admin' $placement_url/resource_providers |json_pp|grep -c '"name"')
+    # Skip curl and note if we failed to create the required number of rps
+    if [[ $rp_count -ge $COUNT ]]; then
+        (
+            echo '##### TIMING GET /allocation_candidates'
+            time curl -s -H 'x-auth-token: admin' -H 'openstack-api-version: placement 1.21' "$placement_url/allocation_candidates?${PLACEMENT_QUERY}" > /dev/null
+            time curl -s -H 'x-auth-token: admin' -H 'openstack-api-version: placement 1.21' "$placement_url/allocation_candidates?${PLACEMENT_QUERY}" > /dev/null
+        ) 2>&1 | tee -a $LOG
+    else
+        (
+            echo "Unable to create expected number of resource providers. Expected: ${COUNT}, Got: $rp_count"
+            echo "See job-output.txt.gz and logs/screen-placement-api.txt.gz for additional detail."
+        ) | tee -a $LOG
+    fi
+    deactivate
+}
+
+# Be admin
+set +x
+source $BASE/new/devstack/openrc admin
+set -x
+check_placement

playbooks/legacy/nova-next/run.yaml

@@ -61,6 +61,9 @@
               if [ -f $BASE/new/nova/gate/post_test_hook.sh ]; then
                   $BASE/new/nova/gate/post_test_hook.sh
               fi
+              if [ -f $BASE/new/nova/gate/post_test_perf_check.sh ]; then
+                  $BASE/new/nova/gate/post_test_perf_check.sh
+              fi
           }
           export -f post_test_hook
           cp devstack-gate/devstack-vm-gate-wrap.sh ./safe-devstack-vm-gate-wrap.sh