hotplug_mem_migration: Support multi-host migration

Signed-off-by: Yongxue Hong <[email protected]>

Author: YongxueHong

qemu/tests/cfg/hotplug_mem_migration.cfg

@@ -32,6 +32,16 @@
     numa_test = 'numactl -m %s dd if=/dev/urandom of=/tmp/numa_test/test '
     numa_test += 'bs=1k count=%d && rm -rf /tmp/numa_test/'
     stress_args = '--cpu 4 --io 4 --vm 2 --vm-bytes 4096M'
+    take_regular_screendumps = no # FIXME:
+    store_vm_info = no # FIXME:
+    nodes = node1 node2
+    node_selectors_node1 = [{"key": "cpu_vendor_id", "operator": "eq", "values": "AuthenticAMD"}, {"key": "hostname", "operator": "contains", "values": "hp-dl385g10-04.lab.eng.pek2.redhat.com"}]
+    node_selectors_node2 = [{"key": "cpu_vendor_id", "operator": "==", "values": "AuthenticAMD"}, {"key": "hostname", "operator": "contains", "values": "hp-dl385g10-05.lab.eng.pek2.redhat.com"}]
+    pools = p1
+    vm_node = node1
+    mig_dest_node = node2
+    pool_selectors_p1 = [{"key": "type", "operator": "==", "values": "nfs"}, {"key": "access.nodes", "operator": "contains", "values": ["node1", "node2"]}]
+    image_pool_name_image1 = p1
     variants with_cache:
         - @default:
         - enable_dirty_ring:

qemu/tests/hotplug_mem_migration.py

@@ -79,7 +79,8 @@ def _compare_mem_size(online_mem, expect_mem_size):
     # do migration
     mig_timeout = params.get_numeric("mig_timeout", 1200, float)
     mig_protocol = params.get("migration_protocol", "tcp")
-    vm.migrate(mig_timeout, mig_protocol, env=env)
+    dst_node = params.get("mig_dest_node")
+    vm.migrate(mig_timeout, mig_protocol, dest_host=dst_node, env=env)
     for target_mem in target_mems.split():
         hotplug_test.unplug_memory(vm, target_mem)
         hotplug_test.check_memory(vm)