[KVM-AUTOTEST PATCH] A test patch - Boot VMs until one of them becomes unresponsive

[Yolkfull Chow <yzhou@redhat.com>]

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Hi,

This test will boot VMs until one of them becomes unresponsive, and 
records the maximum number of VMs successfully started.


-- 
Yolkfull
Regards,


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diff --git a/client/tests/kvm/kvm_tests.py b/client/tests/kvm/kvm_tests.py
index cccc48e..7d00277 100644
--- a/client/tests/kvm/kvm_tests.py
+++ b/client/tests/kvm/kvm_tests.py
@@ -466,3 +466,70 @@ def run_linux_s3(test, params, env):
     logging.info("VM resumed after S3")
 
     session.close()
+
+def run_boot_vms(tests, params, env):
+    """
+    Boots VMs until one of them becomes unresponsive, and records the maximum
+    number of VMs successfully started:
+    1) boot the first vm
+    2) boot the second vm cloned from the first vm, check whether it boots up
+       and all booted vms can ssh-login
+    3) go on until cannot create VM anymore or cannot allocate memory for VM
+
+    @param test: kvm test object
+    @param params: Dictionary with the test parameters
+    @param env: Dictionary with test environment.
+    """
+    # boot the first vm
+    vm1 = kvm_utils.env_get_vm(env, params.get("main_vm"))
+
+    if not vm1:
+        raise error.TestError("VM object not found in environment")
+    if not vm1.is_alive():
+        raise error.TestError("VM seems to be dead; Test requires a living VM")
+
+    logging.info("Waiting for first guest to be up...")
+
+    vm1_session = kvm_utils.wait_for(vm1.ssh_login, 240, 0, 2)
+    if not vm1_session:
+        raise error.TestFail("Could not log into first guest")
+
+    num = 1
+    vms = [vm1]
+    sessions = [vm1_session]
+
+    # boot the VMs
+    while True:
+        try:
+            num += 1
+            vm_name = "vm" + str(num)
+
+            # clone vm according to the first one
+            curr_vm = vm1.clone(vm_name)
+            logging.info(" Booting the %dth guest" % num)
+            if not curr_vm.create():
+                raise error.TestFail("Cannot boot vm anylonger")
+
+            curr_vm_session = kvm_utils.wait_for(curr_vm.ssh_login, 240, 0, 2)
+
+            if not curr_vm_session:
+                curr_vm.send_monitor_cmd("quit")
+                raise error.TestFail("Could not log into %dth guest" % num)
+
+            logging.info(" %dth guest boots up successfully" % num)
+            sessions.append(curr_vm_session)
+            vms.append(curr_vm)
+
+            # check whether all previous ssh sessions are responsive
+            for vm_session in sessions:
+                if not vm_session.is_responsive():
+                    logging.error("%dth guest's session is not responsive" \
+                                       % (sessions.index(vm_session) + 1))
+
+        except (error.TestFail, OSError):
+            for vm in vms:
+                logging.info("Shut down the %dth guest" % (vms.index(vm) + 1))
+                vm.destroy(gracefully = params.get("kill_vm_gracefully") \
+                                                               == "yes")
+            logging.info("Total number booted successfully: %d" % (num - 1))
+            break