+# -*- python-indent: 4 -*-
+
"""A few things that didn't seem to fit anywhere else."""
import os, os.path
import sys
import signal
-###################################################
-# Added by Guilherme Sperb Machado <gsm@machados.org>
-###################################################
-
-import re
-import socket
-import fileinput
-
-# TODO: is there anything better to do if the "libvirt", "sliver_libvirt",
-# and "sliver_lxc" are not in place?
-try:
- import libvirt
- from sliver_libvirt import Sliver_Libvirt
- import sliver_lxc
-except:
- logger.log("Could not import sliver_lxc or libvirt or sliver_libvirt -- which is required here.")
-###################################################
-
import logger
PID_FILE = '/var/run/nodemanager.pid'
os.dup2(crashlog, 2)
def fork_as(su, function, *args):
- """fork(), cd / to avoid keeping unused directories open, close all nonstandard file descriptors (to avoid capturing open sockets), fork() again (to avoid zombies) and call <function> with arguments <args> in the grandchild process. If <su> is not None, set our group and user ids appropriately in the child process."""
+ """
+fork(), cd / to avoid keeping unused directories open,
+close all nonstandard file descriptors (to avoid capturing open sockets),
+fork() again (to avoid zombies) and call <function>
+with arguments <args> in the grandchild process.
+If <su> is not None, set our group and user ids
+ appropriately in the child process.
+ """
child_pid = os.fork()
if child_pid == 0:
try:
####################
# manage files
def pid_file():
- """We use a pid file to ensure that only one copy of NM is running at a given time.
+ """
+We use a pid file to ensure that only one copy of NM is running at a given time.
If successful, this function will write a pid file containing the pid of the current process.
-The return value is the pid of the other running process, or None otherwise."""
+The return value is the pid of the other running process, or None otherwise.
+ """
other_pid = None
if os.access(PID_FILE, os.F_OK): # check for a pid file
handle = open(PID_FILE) # pid file exists, read it
return other_pid
def write_file(filename, do_write, **kw_args):
- """Write file <filename> atomically by opening a temporary file, using <do_write> to write that file, and then renaming the temporary file."""
+ """
+Write file <filename> atomically by opening a temporary file,
+using <do_write> to write that file, and then renaming the temporary file.
+ """
shutil.move(write_temp_file(do_write, **kw_args), filename)
def write_temp_file(do_write, mode=None, uidgid=None):
finally: f.close()
return temporary_filename
-# replace a target file with a new contents - checks for changes
-# can handle chmod if requested
-# can also remove resulting file if contents are void, if requested
-# performs atomically:
-# writes in a tmp file, which is then renamed (from sliverauth originally)
-# returns True if a change occurred, or the file is deleted
def replace_file_with_string (target, new_contents, chmod=None, remove_if_empty=False):
+ """
+Replace a target file with a new contents
+checks for changes: does not do anything if previous state was already right
+can handle chmod if requested
+can also remove resulting file if contents are void, if requested
+performs atomically:
+writes in a tmp file, which is then renamed (from sliverauth originally)
+returns True if a change occurred, or the file is deleted
+ """
try:
current=file(target).read()
except:
if chmod: os.chmod(target,chmod)
return True
-
####################
# utilities functions to get (cached) information from the node
return (cgroup_fn, pid)
+###################################################
+# Added by Guilherme Sperb Machado <gsm@machados.org>
+###################################################
+
+import re
+import socket
+import fileinput
+
+# TODO: is there anything better to do if the "libvirt", "sliver_libvirt",
+# and "sliver_lxc" are not in place?
+try:
+ import libvirt
+ from sliver_libvirt import Sliver_Libvirt
+ import sliver_lxc
+except:
+ logger.log("Could not import sliver_lxc or libvirt or sliver_libvirt -- which is required here.")
+###################################################
+
###################################################
# Author: Guilherme Sperb Machado <gsm@machados.org>
###################################################
-# Basically this method is just a copy from "get_process()", just
+# Basically this method is just a copy from "get_sliver_process()", just
# adding one more split() to correctly parse the processes for LXC.
# Only for LXC!
# TODO: maybe merge both methods, and put the type as an argument, if
pid = None
for e in output:
try:
- l = e.rstrip()
- #logger.log("tools: l=%s" % (l) )
- path = l.split(':')[0]
- #logger.log("tools: path=%s" % (path) )
- comp = l.rsplit(':')[-1]
- #logger.log("tools: comp=%s" % (comp) )
- slice_name_check1 = comp.rsplit('/')[-1]
- #logger.log("tools: slice_name_check1=%s" % (slice_name_check1) )
- slice_name_check2 = slice_name_check1.rsplit('.')[0]
- #logger.log("tools: slice_name_check2=%s" % (slice_name_check2) )
+ l = e.rstrip()
+ #logger.log("tools: l=%s" % (l) )
+ path = l.split(':')[0]
+ #logger.log("tools: path=%s" % (path) )
+ comp = l.rsplit(':')[-1]
+ #logger.log("tools: comp=%s" % (comp) )
+ slice_name_check1 = comp.rsplit('/')[-1]
+ #logger.log("tools: slice_name_check1=%s" % (slice_name_check1) )
+ slice_name_check2 = slice_name_check1.rsplit('.')[0]
+ #logger.log("tools: slice_name_check2=%s" % (slice_name_check2) )
if (slice_name_check2 == slice_name):
- slice_path = path
- pid = slice_path.split('/')[2]
- #logger.log("tools: pid=%s" % (pid) )
- cmdline = open('/proc/%s/cmdline'%pid).read().rstrip('\n\x00')
- #logger.log("tools: cmdline=%s" % (cmdline) )
- #logger.log("tools: process_cmdline=%s" % (process_cmdline) )
- if (cmdline == process_cmdline):
- cgroup_fn = slice_path
- break
+ slice_path = path
+ pid = slice_path.split('/')[2]
+ #logger.log("tools: pid=%s" % (pid) )
+ cmdline = open('/proc/%s/cmdline'%pid).read().rstrip('\n\x00')
+ #logger.log("tools: cmdline=%s" % (cmdline) )
+ #logger.log("tools: process_cmdline=%s" % (process_cmdline) )
+ if (cmdline == process_cmdline):
+ cgroup_fn = slice_path
+ break
except:
- #logger.log("tools: break!")
+ #logger.log("tools: break!")
break
if (not cgroup_fn) or (not pid):
# example: 'inet6 2001:67c:16dc:1302:5054:ff:fea7:7882 prefixlen 64 scopeid 0x0<global>'
prog = re.compile(r'inet6\s+(.*)\s+prefixlen\s+(\d+)\s+scopeid\s+(.+)<global>')
for line in ifconfig.split("\n"):
- search = prog.search(line)
- if search:
- ipv6addr = search.group(1)
- prefixlen = search.group(2)
- return (ipv6addr,prefixlen)
+ search = prog.search(line)
+ if search:
+ ipv6addr = search.group(1)
+ prefixlen = search.group(2)
+ return (ipv6addr,prefixlen)
return None,None
###################################################
# Check if the address is a AF_INET6 family address
###################################################
def isValidIPv6(ipv6addr):
- try:
- socket.inet_pton(socket.AF_INET6, ipv6addr)
- except socket.error:
- return False
- return True
+ try:
+ socket.inet_pton(socket.AF_INET6, ipv6addr)
+ except socket.error:
+ return False
+ return True
### this returns the kind of virtualization on the node
# either 'vs' or 'lxc'
# Only for LXC!
###################################################
def reboot_sliver(name):
- type = 'sliver.LXC'
- # connecting to the libvirtd
- connLibvirt = Sliver_Libvirt.getConnection(type)
- domains = connLibvirt.listAllDomains()
- for domain in domains:
- #ret = dir(domain)
- #for method in ret:
- # logger.log("ipv6: " + repr(method))
- #logger.log("tools: " + str(domain.name()) )
- try:
- domain.destroy()
- logger.log("tools: %s destroyed" % (domain.name()) )
- domain.create()
- logger.log("tools: %s created" % (domain.name()) )
- except:
- logger.log("tools: %s could not be rebooted" % (domain.name()) )
+ type = 'sliver.LXC'
+ # connecting to the libvirtd
+ connLibvirt = Sliver_Libvirt.getConnection(type)
+ domains = connLibvirt.listAllDomains()
+ for domain in domains:
+ #ret = dir(domain)
+ #for method in ret:
+ # logger.log("ipv6: " + repr(method))
+ #logger.log("tools: " + str(domain.name()) )
+ try:
+ domain.destroy()
+ logger.log("tools: %s destroyed" % (domain.name()) )
+ domain.create()
+ logger.log("tools: %s created" % (domain.name()) )
+ except:
+ logger.log("tools: %s could not be rebooted" % (domain.name()) )
###################################################
# Author: Guilherme Sperb Machado <gsm@machados.org>
hostsFilePath = get_hosts_file_path(slicename)
found=False
try:
- for line in fileinput.input(r'%s' % (hostsFilePath)):
- if re.search(r'%s' % (ipv6addr), line):
- found=True
- fileinput.close()
- return found
+ for line in fileinput.input(r'%s' % (hostsFilePath)):
+ if re.search(r'%s' % (ipv6addr), line):
+ found=True
+ fileinput.close()
+ return found
except:
logger.log("tools: error when finding ipv6 address %s in the /etc/hosts file of slice=%s" % (ipv6addr, slicename) )
def remove_all_ipv6addr_hosts(slicename, node):
hostsFilePath = get_hosts_file_path(slicename)
try:
- for line in fileinput.input(r'%s' % (hostsFilePath), inplace=True):
- logger.log("tools: line=%s" % (line) )
- search = re.search(r'^(.*)\s+(%s|%s)$' % (node,'localhost'), line)
- if search:
- ipv6candidate = search.group(1)
- ipv6candidatestrip = ipv6candidate.strip()
- logger.log("tools: group1=%s" % (ipv6candidatestrip) )
- valid = isValidIPv6(ipv6candidatestrip)
- if not valid:
- logger.log("tools: address=%s not valid" % (ipv6candidatestrip) )
- print line,
- fileinput.close()
+ for line in fileinput.input(r'%s' % (hostsFilePath), inplace=True):
+ logger.log("tools: line=%s" % (line) )
+ search = re.search(r'^(.*)\s+(%s|%s)$' % (node,'localhost'), line)
+ if search:
+ ipv6candidate = search.group(1)
+ ipv6candidatestrip = ipv6candidate.strip()
+ logger.log("tools: group1=%s" % (ipv6candidatestrip) )
+ valid = isValidIPv6(ipv6candidatestrip)
+ if not valid:
+ logger.log("tools: address=%s not valid" % (ipv6candidatestrip) )
+ print line,
+ fileinput.close()
except:
- logger.log("tools: could not delete the ipv6 address from the hosts file of slice=%s" % (slicename) )
+ logger.log("tools: could not delete the ipv6 address from the hosts file of slice=%s" % (slicename) )
###################################################
# Author: Guilherme Sperb Machado <gsm@machados.org>
#string = "127.0.0.1\tlocalhost\n192.168.100.179\tmyplc-node1-vm.mgmt.local\n"
#string = "127.0.0.1\tlocalhost\n"
try:
- with open(hostsFilePath, "a") as file:
- # debugging purposes only:
- #file.write(string)
- file.write(ipv6addr + " " + node + "\n")
- file.close()
+ with open(hostsFilePath, "a") as file:
+ # debugging purposes only:
+ #file.write(string)
+ file.write(ipv6addr + " " + node + "\n")
+ file.close()
except:
- logger.log("tools: could not add the IPv6 address to the hosts file of slice=%s" % (slicename) )
+ logger.log("tools: could not add the IPv6 address to the hosts file of slice=%s" % (slicename) )
git://git.onelab.eu / nodemanager.git / blobdiff