[Cluster-devel] [PATCH] fence_netio: new fence-agent for the Koukaam NETIO-230B PDU

[Niels de Vos <ndevos@redhat.com>]

The Koukaam NETIO-230B is a power distribution unit with four normal
(European) sockets. The device has a webui and a telnet interface. Each
socket can be given a custom name, which is returned with '-o list'.

Link to the device, its specifications and API:
- http://www.koukaam.se/kkm/showproduct.php?article_id=1502

Signed-off-by: Niels de Vos <ndevos@redhat.com>
---
 .gitignore                        |    1 +
 configure.ac                      |    1 +
 fence/agents/netio/Makefile.am    |   17 +++++
 fence/agents/netio/fence_netio.py |  119 +++++++++++++++++++++++++++++++++++++
 4 files changed, 138 insertions(+), 0 deletions(-)
 create mode 100644 fence/agents/netio/Makefile.am
 create mode 100755 fence/agents/netio/fence_netio.py

diff --git a/.gitignore b/.gitignore
index 245592f..0c19556 100644
--- a/.gitignore
+++ b/.gitignore
@@ -59,6 +59,7 @@ fence/agents/lib/fencing_snmp.pyc
 fence/agents/lpar/fence_lpar
 fence/agents/manual/fence_ack_manual
 fence/agents/mcdata/fence_mcdata
+fence/agents/netio/fence_netio
 fence/agents/node_assassin/fence_na
 fence/agents/node_assassin/fence_na.conf
 fence/agents/node_assassin/fence_na.lib
diff --git a/configure.ac b/configure.ac
index 910cab8..6f4baa0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -276,6 +276,7 @@ AC_CONFIG_FILES([Makefile
 		 fence/agents/lpar/Makefile
 		 fence/agents/manual/Makefile
 		 fence/agents/mcdata/Makefile
+		 fence/agents/netio/Makefile
 		 fence/agents/nss_wrapper/Makefile
 		 fence/agents/rackswitch/Makefile
 		 fence/agents/ovh/Makefile
diff --git a/fence/agents/netio/Makefile.am b/fence/agents/netio/Makefile.am
new file mode 100644
index 0000000..3e1a1d9
--- /dev/null
+++ b/fence/agents/netio/Makefile.am
@@ -0,0 +1,17 @@
+MAINTAINERCLEANFILES	= Makefile.in
+
+TARGET			= fence_netio
+
+SRC			= $(TARGET).py
+
+EXTRA_DIST		= $(SRC)
+
+sbin_SCRIPTS		= $(TARGET)
+
+man_MANS		= $(TARGET).8
+
+include $(top_srcdir)/make/fencebuild.mk
+include $(top_srcdir)/make/fenceman.mk
+
+clean-local: clean-man
+	rm -f $(TARGET)
diff --git a/fence/agents/netio/fence_netio.py b/fence/agents/netio/fence_netio.py
new file mode 100755
index 0000000..ffb6e30
--- /dev/null
+++ b/fence/agents/netio/fence_netio.py
@@ -0,0 +1,119 @@
+#!/usr/bin/python
+
+import sys, re, pexpect, exceptions
+sys.path.append("@FENCEAGENTSLIBDIR@")
+from fencing import *
+
+#BEGIN_VERSION_GENERATION
+RELEASE_VERSION=""
+REDHAT_COPYRIGHT=""
+BUILD_DATE=""
+#END_VERSION_GENERATION
+
+def get_power_status(conn, options):
+	conn.send_eol("port %s" % options["--plug"])
+	re_status = re.compile("250 [01imt]")
+	conn.log_expect(options, re_status, int(options["--shell-timeout"]))
+	status = {
+		"0" : "off",
+		"1" : "on",
+		"i" : "reboot",
+		"m" : "manual",
+		"t" : "timer"
+	}[conn.after.split()[1]]
+
+	return status
+
+def set_power_status(conn, options):
+	action = {
+		"on" : "1",
+		"off" : "0",
+		"reboot" : "i"
+	}[options["--action"]]
+
+	conn.send_eol("port %s %s" % (options["--plug"], action))
+	conn.log_expect(options, "250 OK", int(options["--shell-timeout"]))
+
+def get_outlet_list(conn, options):
+	result = {}
+
+	try:
+		# the NETIO-230B has 4 ports, counting start at 1
+		for plug in ["1", "2", "3", "4"]:
+			conn.send_eol("port setup %s" % plug)
+			conn.log_expect(options, "250 .+", int(options["--shell-timeout"]))
+			# the name is enclosed in "", drop those with [1:-1]
+			name = conn.after.split()[1][1:-1]
+			result[plug] = (name, "unknown")
+	except Exception, exn:
+		print str(exn)
+
+	return result
+
+def main():
+	device_opt = [ "ipaddr", "login", "passwd", "port" ]
+
+	atexit.register(atexit_handler)
+
+	opt = process_input(device_opt)
+
+	# set default port for telnet only
+	if 0 == opt.has_key("--ipport"):
+		opt["--ipport"] = "1234"
+
+	opt["eol"] = "\r\n"
+	options = check_input(device_opt, opt)
+
+	docs = { }
+	docs["shortdesc"] = "I/O Fencing agent for Koukaam NETIO-230B"
+	docs["longdesc"] = "fence_netio is an I/O Fencing agent which can be \
+used with the Koukaam NETIO-230B Power Distribution Unit. It logs into \
+device via telnet and reboots a specified outlet. Lengthy telnet connections \
+should be avoided while a GFS cluster is running because the connection will \
+block any necessary fencing actions."
+	docs["vendorurl"] = "http://www.koukaam.se/"
+	show_docs(options, docs)
+
+	##
+	## Operate the fencing device
+	## We can not use fence_login(), username and passwd are sent on one line
+	####
+	try:
+		try:
+			conn = fspawn(options, TELNET_PATH)
+			conn.send("set binary\n")
+			conn.send("open %s -%s\n"%(options["--ip"], options["--ipport"]))
+		except pexpect.ExceptionPexpect, ex:
+			sys.stderr.write(str(ex) + "\n")
+			sys.stderr.write("Due to limitations, binary dependencies on fence agents "
+			"are not in the spec file and must be installed separately." + "\n")
+			sys.exit(EC_GENERIC_ERROR)
+
+		screen = conn.read_nonblocking(size=100, timeout=int(options["--shell-timeout"]))
+		conn.log_expect(options, "100 HELLO .*", int(options["--shell-timeout"]))
+		conn.send_eol("login %s %s" % (options["--username"], options["--password"]))
+		conn.log_expect(options, "250 OK", int(options["--shell-timeout"]))
+	except pexpect.EOF:
+		fail(EC_LOGIN_DENIED)
+	except pexpect.TIMEOUT:
+		fail(EC_LOGIN_DENIED)
+	result = fence_action(conn, options, set_power_status, get_power_status, get_outlet_list)
+
+	##
+	## Logout from system
+	##
+	## In some special unspecified cases it is possible that
+	## connection will be closed before we run close(). This is not
+	## a problem because everything is checked before.
+	######
+	try:
+		conn.send("quit\n")
+		conn.log_expect(options, "110 BYE", int(options["--shell-timeout"]))
+		conn.close()
+	except:
+		pass
+
+	sys.exit(result)
+
+if __name__ == "__main__":
+	main()
-- 
1.7.1