cluster: STABLE3 - fence_agents: #487501 - Exceptions in fencing agents

["Marek Grác" <marx@fedoraproject.org>]

Gitweb:        http://git.fedorahosted.org/git/cluster.git?p=cluster.git;a=commitdiff;h=13383ae37c9a9cb3bf92f6b7cf64fc7b2ccfb232
Commit:        13383ae37c9a9cb3bf92f6b7cf64fc7b2ccfb232
Parent:        ad1736b57771e744e9c61389a90176fe40b7b0fd
Author:        Marek 'marx' Grac <mgrac@redhat.com>
AuthorDate:    Fri Mar 13 15:44:27 2009 +0100
Committer:     Marek 'marx' Grac <mgrac@redhat.com>
CommitterDate: Fri Mar 13 15:44:27 2009 +0100

fence_agents: #487501 - Exceptions in fencing agents

Several of new fencing agent does not work when bad options are entered (bad
password, non-existent outlet number, ...). This is not a problem. Unfortunately
python exceptions are thrown and we don't care about catching
them. Such output is very usefull for debugging (as people tends to send it)
but it will be better if the user will see that the error is in the input data.

Only bigger change is in APC. In other cases only catching exception was added
---
 fence/agents/apc/fence_apc.py                 |   16 ++++++++++------
 fence/agents/bladecenter/fence_bladecenter.py |    5 ++++-
 fence/agents/ilo/fence_ilo.py                 |    2 ++
 fence/agents/lib/fencing.py.py                |    4 +++-
 fence/agents/lpar/fence_lpar.py               |   12 +++++++++---
 5 files changed, 28 insertions(+), 11 deletions(-)

diff --git a/fence/agents/apc/fence_apc.py b/fence/agents/apc/fence_apc.py
index ca5d2ac..6707787 100755
--- a/fence/agents/apc/fence_apc.py
+++ b/fence/agents/apc/fence_apc.py
@@ -25,7 +25,7 @@ BUILD_DATE="March, 2008"
 #END_VERSION_GENERATION
 
 def get_power_status(conn, options):
-	result = ""
+	exp_result = 0
 	outlets = {}
 	try:
 		conn.send("1\r\n")
@@ -67,8 +67,8 @@ def get_power_status(conn, options):
 		else:
 			conn.send(options["-s"]+"\r\n")
 			
-		while 1 == conn.log_expect(options, [ options["-c"],  "Press <ENTER>" ], SHELL_TIMEOUT):
-			result += conn.before
+		while True:
+			exp_result == conn.log_expect(options, [ options["-c"],  "Press <ENTER>" ], SHELL_TIMEOUT)
 			lines = conn.before.split("\n");
 			show_re = re.compile('^\s*(\d+)- (.*?)\s+(ON|OFF)\s*$')
 			for x in lines:
@@ -76,7 +76,8 @@ def get_power_status(conn, options):
 				if (res != None):
 					outlets[res.group(1)] = (res.group(2), res.group(3))
 			conn.send("\r\n")
-		result += conn.before
+			if exp_result == 0:
+				break
 		conn.send(chr(03))		
 		conn.log_expect(options, "- Logout", SHELL_TIMEOUT)
 		conn.log_expect(options, options["-c"], SHELL_TIMEOUT)
@@ -88,8 +89,11 @@ def get_power_status(conn, options):
 	if ["list", "monitor"].count(options["-o"]) == 1:
 		return outlets
 	else:
-		status = re.compile("\s*"+options["-n"]+"-.*(ON|OFF)", re.IGNORECASE).search(result).group(1)
-		return status.lower().strip()
+		try:
+			(_, status) = outlets[options["-n"]]
+			return status.lower().strip()
+		except KeyError:
+			fail(EC_STATUS)
 
 def set_power_status(conn, options):
 	action = {
diff --git a/fence/agents/bladecenter/fence_bladecenter.py b/fence/agents/bladecenter/fence_bladecenter.py
index a5da620..3e277e1 100644
--- a/fence/agents/bladecenter/fence_bladecenter.py
+++ b/fence/agents/bladecenter/fence_bladecenter.py
@@ -27,7 +27,10 @@ def get_power_status(conn, options):
 		node_cmd = "system:blade\[" + options["-n"] + "\]>"
 
 		conn.send("env -T system:blade[" + options["-n"] + "]\r\n")
-		conn.log_expect(options, node_cmd, SHELL_TIMEOUT)
+		i = conn.log_expect(options, [ node_cmd, "system>" ] , SHELL_TIMEOUT)
+		if i == 1:
+			## Given blade number does not exist
+			fail(EC_STATUS)
 		conn.send("power -state\r\n")
 		conn.log_expect(options, node_cmd, SHELL_TIMEOUT)
 		status = conn.before.splitlines()[-1]
diff --git a/fence/agents/ilo/fence_ilo.py b/fence/agents/ilo/fence_ilo.py
index 13263d3..fafade1 100755
--- a/fence/agents/ilo/fence_ilo.py
+++ b/fence/agents/ilo/fence_ilo.py
@@ -93,6 +93,8 @@ def main():
 		conn.send("</LOGIN>\r\n")
 	except pexpect.TIMEOUT:
 		fail(EC_LOGIN_DENIED)
+	except pexpect.EOF:
+		fail(EC_LOGIN_DENIED)
 
 	##
 	## Fence operations
diff --git a/fence/agents/lib/fencing.py.py b/fence/agents/lib/fencing.py.py
index c6a5a33..e5473e1 100644
--- a/fence/agents/lib/fencing.py.py
+++ b/fence/agents/lib/fencing.py.py
@@ -26,6 +26,7 @@ EC_TIMED_OUT       = 5
 EC_WAITING_ON      = 6
 EC_WAITING_OFF     = 7
 EC_STATUS          = 8
+EC_STATUS_HMC      = 9
 
 TELNET_PATH = "/usr/bin/telnet"
 SSH_PATH    = "/usr/bin/ssh"
@@ -304,7 +305,8 @@ def fail(error_code):
 		EC_TIMED_OUT : "Connection timed out",
 		EC_WAITING_ON : "Failed: Timed out waiting to power ON",
 		EC_WAITING_OFF : "Failed: Timed out waiting to power OFF",
-		EC_STATUS : "Failed: Unable to obtain correct plug status"
+		EC_STATUS : "Failed: Unable to obtain correct plug status or plug is not available",
+		EC_STATUS_HMC : "Failed: Either unable to obtaion correct plug status, partition is not available or incorrect HMC version used"
 	}[error_code] + "\n"
 	sys.stderr.write(message)
 	sys.exit(error_code)
diff --git a/fence/agents/lpar/fence_lpar.py b/fence/agents/lpar/fence_lpar.py
index 9cb117d..5b75cc8 100644
--- a/fence/agents/lpar/fence_lpar.py
+++ b/fence/agents/lpar/fence_lpar.py
@@ -30,7 +30,10 @@ def get_power_status(conn, options):
 		except pexpect.TIMEOUT:
 			fail(EC_TIMED_OUT)
 
-		status = re.compile("^" + options["-n"] + ",(.*?),.*$", re.IGNORECASE | re.MULTILINE).search(conn.before).group(1)
+		try:
+			status = re.compile("^" + options["-n"] + ",(.*?),.*$", re.IGNORECASE | re.MULTILINE).search(conn.before).group(1)
+		except AttributeError:
+			fail(EC_STATUS_HMC)
 	elif options["-H"] == "4":
 		try:
 			conn.send("lssyscfg -r lpar -m "+ options["-s"] +" --filter 'lpar_names=" + options["-n"] + "'\n")
@@ -39,8 +42,11 @@ def get_power_status(conn, options):
 			fail(EC_CONNECTION_LOST)
 		except pexpect.TIMEOUT:
 			fail(EC_TIMED_OUT)
-				
-		status = re.compile(",state=(.*?),", re.IGNORECASE).search(conn.before).group(1)
+
+		try:				
+			status = re.compile(",state=(.*?),", re.IGNORECASE).search(conn.before).group(1)
+		except AttributeError:
+			fail(EC_STATUS_HMC)
 
 	##
 	## Transformation to standard ON/OFF status if possible