[PATCH v2 10/10] KVM test: Add a helper to search the panic in the log

[Jason Wang <jasowang@redhat.com>]

This checker serves as the post_command to find the panic information
in the file which contains the content of guest serial console.

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 client/tests/kvm/scripts/check_serial.py |   41 ++++++++++++++++++++++++++++++
 client/tests/kvm/tests_base.cfg.sample   |    7 ++++-
 2 files changed, 46 insertions(+), 2 deletions(-)
 create mode 100644 client/tests/kvm/scripts/check_serial.py

diff --git a/client/tests/kvm/scripts/check_serial.py b/client/tests/kvm/scripts/check_serial.py
new file mode 100644
index 0000000..969bbe3
--- /dev/null
+++ b/client/tests/kvm/scripts/check_serial.py
@@ -0,0 +1,41 @@
+import os, sys, glob, re
+
+
+class SerialCheckerError(Exception):
+    """
+    Simple wrapper for the builtin Exception class.
+    """
+    pass
+
+
+class SerialChecker(object):
+    """
+    Serach the panic or other keywords in the guest serial.
+    """
+    def __init__(self):
+        """
+        Gets params from environment variables and sets class attributes.
+        """
+        client_dir =  os.environ['AUTODIR']
+        self.pattern = os.environ['KVM_TEST_search_pattern']
+        self.shortname = os.environ['KVM_TEST_shortname']
+        self.debugdir = os.path.join(client_dir, "results/default/kvm.%s/debug" \
+                                     % self.shortname)
+        self.serial_files = glob.glob(os.path.join(self.debugdir, 'serial*'))
+
+
+    def check(self):
+        """
+        Check whether the pattern were found in the serial files
+        """
+        fail = [ f for f in self.serial_files if
+                 re.findall(self.pattern, file(f).read(), re.I) ]
+        if fail:
+            print "%s is found in %s" % (self.pattern, fail)
+            raise SerialCheckerError("Error found during the check, Please" \
+                                     " check the log")
+
+
+if __name__ == "__main__":
+    checker = SerialChecker()
+    checker.check()
diff --git a/client/tests/kvm/tests_base.cfg.sample b/client/tests/kvm/tests_base.cfg.sample
index 3c0933e..3ac8f0d 100644
--- a/client/tests/kvm/tests_base.cfg.sample
+++ b/client/tests/kvm/tests_base.cfg.sample
@@ -52,6 +52,10 @@ address_index = 0
 # Misc
 profilers = kvm_stat
 
+# pattern serach in guest serial console
+serach_pattern = panic
+post_command = "python scripts/check_serial.py"
+post_command_noncritical = no
 
 # Tests
 variants:
@@ -1314,10 +1318,9 @@ virtio|virtio_blk|e1000|balloon_check:
 variants:
     - @qcow2:
         image_format = qcow2
-        post_command = " python scripts/check_image.py;"
+        post_command = " python scripts/check_image.py; python scripts/check_serial.py"
         remove_image = no
         post_command_timeout = 600
-        post_command_noncritical = yes
     - vmdk:
         only Fedora Ubuntu Windows
         only smp2