cluster: RHEL56 - fence_rhevm: New fence agent for RHEV-M REST API
Marek Grác
marx at fedoraproject.org
Fri Sep 24 22:53:45 UTC 2010
Gitweb: http://git.fedorahosted.org/git/cluster.git?p=cluster.git;a=commitdiff;h=20433b6cab6465b2cdaefb3d383d12da68cab309
Commit: 20433b6cab6465b2cdaefb3d383d12da68cab309
Parent: 1d2a31568a1b502b65bb33358424539911e55d4d
Author: Marek 'marx' Grac <mgrac at redhat.com>
AuthorDate: Sat Sep 25 00:25:35 2010 +0200
Committer: Marek 'marx' Grac <mgrac at redhat.com>
CommitterDate: Sat Sep 25 00:39:30 2010 +0200
fence_rhevm: New fence agent for RHEV-M REST API
Resolves: rhbz#595385
---
fence/agents/lib/fencing.py.py | 8 ++-
fence/agents/rhevm/Makefile | 38 ++++++++++
fence/agents/rhevm/fence_rhevm.py | 144 +++++++++++++++++++++++++++++++++++++
3 files changed, 189 insertions(+), 1 deletions(-)
diff --git a/fence/agents/lib/fencing.py.py b/fence/agents/lib/fencing.py.py
index 43eafe2..be2a44e 100644
--- a/fence/agents/lib/fencing.py.py
+++ b/fence/agents/lib/fencing.py.py
@@ -79,6 +79,10 @@ all_opt = {
"getopt" : "",
"help" : "",
"order" : 1 },
+ "web" : {
+ "getopt" : "",
+ "help" : "",
+ "order" : 1 },
"action" : {
"getopt" : "o:",
"longopt" : "action",
@@ -346,7 +350,7 @@ all_opt = {
"help" : "--shell-timeout <seconds> Wait X seconds for cmd prompt after issuing command",
"default" : "3",
"required" : "0",
- "shortdesc" : "Wait X seconds for cmd promprt after issuing command",
+ "shortdesc" : "Wait X seconds for cmd prompt after issuing command",
"order" : 200 },
"power_timeout" : {
"getopt" : "g:",
@@ -697,6 +701,8 @@ def check_input(device_opt, opt):
options["-u"] = 22
elif options.has_key("-z"):
options["-u"] = 443
+ elif device_opt.count("web"):
+ options["-u"] = 80
else:
options["-u"] = 23
diff --git a/fence/agents/rhevm/Makefile b/fence/agents/rhevm/Makefile
new file mode 100644
index 0000000..4315a91
--- /dev/null
+++ b/fence/agents/rhevm/Makefile
@@ -0,0 +1,38 @@
+###############################################################################
+###############################################################################
+##
+## Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+## Copyright (C) 2004 Red Hat, Inc. All rights reserved.
+##
+## This copyrighted material is made available to anyone wishing to use,
+## modify, copy, or redistribute it subject to the terms and conditions
+## of the GNU General Public License v.2.
+##
+###############################################################################
+###############################################################################
+
+SOURCE= fence_rhevm.py
+TARGET= fence_rhevm
+
+top_srcdir=../..
+include ${top_srcdir}/make/defines.mk
+
+all: $(TARGET)
+
+fence_rhevm: $(SOURCE)
+ : > $(TARGET)
+ awk "{print}(\$$1 ~ /#BEGIN_VERSION_GENERATION/){exit 0}" $(SOURCE) >> $(TARGET)
+ echo "FENCE_RELEASE_NAME=\"${RELEASE}\";" >> $(TARGET)
+ ${top_srcdir}/scripts/define2var ${top_srcdir}/config/copyright.cf sh REDHAT_COPYRIGHT >> $(TARGET)
+ echo "BUILD_DATE=\"(built `date`)\";" >> $(TARGET)
+ awk -v p=0 "(\$$1 ~ /#END_VERSION_GENERATION/){p = 1} {if(p==1)print}" $(SOURCE) >> $(TARGET)
+ chmod +x $(TARGET)
+
+install: all
+ if [ ! -d ${sbindir} ]; then \
+ install -d ${sbindir}; \
+ fi
+ install -m755 ${TARGET} ${sbindir}
+
+clean:
+ rm -f $(TARGET)
diff --git a/fence/agents/rhevm/fence_rhevm.py b/fence/agents/rhevm/fence_rhevm.py
new file mode 100755
index 0000000..92272b9
--- /dev/null
+++ b/fence/agents/rhevm/fence_rhevm.py
@@ -0,0 +1,144 @@
+#!/usr/bin/python
+
+import sys, re, pexpect, socket
+import pycurl, StringIO
+sys.path.append("/usr/lib/fence")
+from fencing import *
+
+#BEGIN_VERSION_GENERATION
+FENCE_RELEASE_NAME=""
+REDHAT_COPYRIGHT=""
+BUILD_DATE=""
+#END_VERSION_GENERATION
+
+re_get_id = re.compile("<vm id=\"(.*?)\"", re.IGNORECASE);
+re_status = re.compile("<status>(.*?)</status>", re.IGNORECASE);
+re_get_name = re.compile("<name>(.*?)</name>", re.IGNORECASE);
+
+def get_power_status(conn, options):
+ ### Obtain real ID from name
+ try:
+ res = send_command(options, "vms/?search=name%3D" + options["-n"])
+ except pycurl.error, e:
+ sys.stderr.write(e[1] + "\n")
+ fail(EC_TIMED_OUT)
+
+ result = re_get_id.search(res)
+ if (result == None):
+ # Unable to obtain ID needed to access virtual machine
+ fail(EC_STATUS)
+
+ options["id"] = result.group(1);
+
+ re_status.search(res)
+ result = re_status.search(res)
+ if (result == None):
+ # We were able to parse ID so output is correct
+ # in some cases it is possible that RHEV-M output does not
+ # contain <status> line. We can assume machine is OFF then
+ return "off"
+ else:
+ status = result.group(1)
+
+ if (status == "RUNNING"):
+ return "on"
+ else:
+ return "off"
+
+def set_power_status(conn, options):
+ action = {
+ 'on' : "start",
+ 'off' : "stop"
+ }[options["-o"]]
+
+ url = "vms/" + options["id"] + "/" + action
+ try:
+ res = send_command(options, url, "POST")
+ except pycurl.error, e:
+ sys.stderr.write(e[1] + "\n")
+ fail(EC_TIMED_OUT)
+
+ return
+
+def get_list(conn, options):
+ outlets = { }
+
+ try:
+ try:
+ res = send_command(options, "vms")
+ except pycurl.error, e:
+ sys.stderr.write(e[1] + "\n")
+ fail(EC_TIMED_OUT)
+
+ lines = res.split("<vm ")
+ for i in range(1, len(lines)):
+ name = re_get_name.search(lines[i]).group(1)
+ outlets[name] = ("", None)
+ except AttributeError:
+ return { }
+ except IndexError:
+ return { }
+
+ return outlets
+
+def send_command(opt, command, method = "GET"):
+ ## setup correct URL
+ if opt.has_key("-z"):
+ url = "https:"
+ else:
+ url = "http:"
+
+ url += "//" + opt["-a"] + ":" + str(opt["-u"]) + "/rhevm-api-powershell/" + command
+
+ ## send command through pycurl
+ c = pycurl.Curl()
+ b = StringIO.StringIO()
+ c.setopt(pycurl.URL, url)
+ c.setopt(pycurl.HTTPHEADER, [ "Content-type: application/xml", "Accept: application/xml" ])
+ c.setopt(pycurl.HTTPAUTH, pycurl.HTTPAUTH_BASIC)
+ c.setopt(pycurl.USERPWD, opt["-l"] + ":" + opt["-p"])
+ c.setopt(pycurl.TIMEOUT, int(opt["-Y"]))
+ c.setopt(pycurl.SSL_VERIFYPEER, 0)
+
+ if (method == "POST"):
+ c.setopt(pycurl.POSTFIELDS, "<action />")
+
+ c.setopt(pycurl.WRITEFUNCTION, b.write)
+ c.perform()
+ result = b.getvalue()
+
+ if opt["log"] >= LOG_MODE_VERBOSE:
+ opt["debug_fh"].write(command + "\n")
+ opt["debug_fh"].write(result + "\n")
+
+ return result
+
+def main():
+ device_opt = [ "help", "version", "agent", "quiet", "verbose", "debug",
+ "action", "ipaddr", "login", "passwd", "passwd_script",
+ "ssl", "inet4_only", "inet6_only", "ipport", "port",
+ "web", "separator", "power_wait", "power_timeout",
+ "shell_timeout" ]
+
+ atexit.register(atexit_handler)
+
+ all_opt["power_wait"]["default"] = "1"
+
+ options = check_input(device_opt, process_input(device_opt))
+
+ docs = { }
+ docs["shortdesc"] = "Fence agent for RHEV-M REST API"
+ docs["longdesc"] = "fence_rhevm is an I/O Fencing agent which can be \
+used with RHEV-M REST API to fence virtual machines."
+ docs["vendorurl"] = "http://www.redhat.com"
+ show_docs(options, docs)
+
+ ##
+ ## Fence operations
+ ####
+ result = fence_action(None, options, set_power_status, get_power_status, get_list)
+
+ sys.exit(result)
+
+if __name__ == "__main__":
+ main()
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