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fence_rhevm.py
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#!/usr/bin/python
import sys, re
import pycurl, StringIO
sys.path.append("@FENCEAGENTSLIBDIR@")
from fencing import *
#BEGIN_VERSION_GENERATION
RELEASE_VERSION="New RHEV-M Agent - test release on steroids"
REDHAT_COPYRIGHT=""
BUILD_DATE="March, 2008"
#END_VERSION_GENERATION
re_get_id = re.compile("<vm( .*)? id=\"(.*?)\"", re.IGNORECASE)
re_status = re.compile("<state>(.*?)</state>", 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(2)
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.lower() == "down"):
return "off"
else:
return "on"
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"]) + "/api/" + 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)
c.setopt(pycurl.SSL_VERIFYHOST, 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 = [ "ipaddr", "login", "passwd", "passwd_script", "ssl",
"inet4_only", "inet6_only", "ipport", "port", "web", "separator" ]
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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