X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;ds=sidebyside;f=tools.py;h=fdfe50d2674b3a9b5700ef2298f7e552498f2d74;hb=d7eea4340763ac42f07664f16aafc64f84257b55;hp=4a658b839279a8c63667118df5f789d190663e07;hpb=96f42102a4711252f3ef4ca22ccd64bf0b8f7341;p=nodemanager.git diff --git a/tools.py b/tools.py index 4a658b8..fdfe50d 100644 --- a/tools.py +++ b/tools.py @@ -215,10 +215,11 @@ class NMLock: # running ifconfig inside of the slice's context. def get_sliver_process(slice_name, process_cmdline): - """ Utility function to find a process inside of an LXC sliver. Returns - (cgroup_fn, pid). cgroup_fn is the filename of the cgroup file for - the process, for example /proc/2592/cgroup. Pid is the process id of - the process. If the process is not found then (None, None) is returned. + """ + Utility function to find a process inside of an LXC sliver. Returns + (cgroup_fn, pid). cgroup_fn is the filename of the cgroup file for + the process, for example /proc/2592/cgroup. Pid is the process id of + the process. If the process is not found then (None, None) is returned. """ try: cmd = 'grep %s /proc/*/cgroup | grep freezer'%slice_name @@ -236,6 +237,25 @@ def get_sliver_process(slice_name, process_cmdline): path = l.split(':')[0] comp = l.rsplit(':')[-1] slice_name_check = comp.rsplit('/')[-1] + # the lines below were added by Guilherme + # due to the LXC requirements + # What we have to consider here is that libervirt on Fedora 18 + # uses the following line: + # /proc/1253/cgroup:6:freezer:/machine.slice/auto_sirius.libvirt-lxc + # While the libvirt on Fedora 20 and 21 uses the following line: + # /proc/1253/cgroup:6:freezer:/machine.slice/machine-lxc\x2del_sirius.scope + # Further documentation on: + # https://libvirt.org/cgroups.html#systemdScope + virt=get_node_virt() + if virt=='lxc': + # This is for Fedora 20 or later + regexf20orlater = re.compile(r'machine-lxc\\x2d(.+).scope') + isf20orlater = regexf20orlater.search(slice_name_check) + if isf20orlater: + slice_name_check = isf20orlater.group(1) + else: + # This is for Fedora 18 + slice_name_check = slice_name_check.rsplit('.')[0] if (slice_name_check == slice_name): slice_path = path @@ -257,9 +277,12 @@ def get_sliver_process(slice_name, process_cmdline): # Added by Guilherme Sperb Machado ################################################### -import re -import socket -import fileinput +try: + import re + import socket + import fileinput +except: + logger.log("Could not import 're', 'socket', or 'fileinput' python packages.") # TODO: is there anything better to do if the "libvirt", "sliver_libvirt", # and "sliver_lxc" are not in place? @@ -268,120 +291,14 @@ try: 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.") + logger.log("Could not import 'sliver_lxc' or 'libvirt' or 'sliver_libvirt'.") ################################################### -################################################### -# Author: Guilherme Sperb Machado -################################################### -# 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 -# it is LXC or vserver -################################################### -def get_sliver_process_lxc(slice_name, process_cmdline): - """ Utility function to find a process inside of an LXC sliver. Returns - (cgroup_fn, pid). cgroup_fn is the filename of the cgroup file for - the process, for example /proc/2592/cgroup. Pid is the process id of - the process. If the process is not found then (None, None) is returned. - """ - try: - cmd = 'grep %s /proc/*/cgroup | grep freezer'%slice_name - output = os.popen(cmd).readlines() - except: - # the slice couldn't be found - logger.log("get_sliver_process: couldn't find slice %s" % slice_name) - return (None, None) - - cgroup_fn = None - 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) ) - - 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 - except: - #logger.log("tools: break!") - break - - if (not cgroup_fn) or (not pid): - logger.log("get_sliver_process: process %s not running in slice %s" % (process_cmdline, slice_name)) - return (None, None) - - return (cgroup_fn, pid) - - def get_sliver_ifconfig(slice_name, device="eth0"): - """ return the output of "ifconfig" run from inside the sliver. - - side effects: adds "/usr/sbin" to sys.path """ + return the output of "ifconfig" run from inside the sliver. - # See if setns is installed. If it's not then we're probably not running - # LXC. - if not os.path.exists("/usr/sbin/setns.so"): - return None - - # setns is part of lxcsu and is installed to /usr/sbin - if not "/usr/sbin" in sys.path: - sys.path.append("/usr/sbin") - import setns - - (cgroup_fn, pid) = get_sliver_process(slice_name, "/sbin/init") - if (not cgroup_fn) or (not pid): - return None - - path = '/proc/%s/ns/net'%pid - - result = None - try: - setns.chcontext(path) - - args = ["/sbin/ifconfig", device] - sub = subprocess.Popen(args, stderr = subprocess.PIPE, stdout = subprocess.PIPE) - sub.wait() - - if (sub.returncode != 0): - logger.log("get_slice_ifconfig: error in ifconfig: %s" % sub.stderr.read()) - - result = sub.stdout.read() - finally: - setns.chcontext("/proc/1/ns/net") - - return result - -################################################### -# Author: Guilherme Sperb Machado -################################################### -# Basically this method is just a copy from "get_sliver_ifconfig()", but, -# instead, calls the "get_sliver_process_lxc()" method. -# Only for LXC! -# TODO: maybe merge both methods, and put the type as an argument, if -# it is LXC or vserver -################################################### -def get_sliver_ifconfig_lxc(slice_name, device="eth0"): - """ return the output of "ifconfig" run from inside the sliver. - - side effects: adds "/usr/sbin" to sys.path + side effects: adds "/usr/sbin" to sys.path """ # See if setns is installed. If it's not then we're probably not running @@ -394,7 +311,7 @@ def get_sliver_ifconfig_lxc(slice_name, device="eth0"): sys.path.append("/usr/sbin") import setns - (cgroup_fn, pid) = get_sliver_process_lxc(slice_name, "/sbin/init") + (cgroup_fn, pid) = get_sliver_process(slice_name, "/sbin/init") if (not cgroup_fn) or (not pid): return None @@ -417,7 +334,6 @@ def get_sliver_ifconfig_lxc(slice_name, device="eth0"): return result - def get_sliver_ip(slice_name): ifconfig = get_sliver_ifconfig(slice_name) if not ifconfig: @@ -439,7 +355,7 @@ def get_sliver_ip(slice_name): # Only for LXC! ################################################### def get_sliver_ipv6(slice_name): - ifconfig = get_sliver_ifconfig_lxc(slice_name) + ifconfig = get_sliver_ifconfig(slice_name) if not ifconfig: return None,None @@ -507,12 +423,23 @@ def reboot_slivers(): domains = connLibvirt.listAllDomains() for domain in domains: 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()) ) + # set the flag VIR_DOMAIN_REBOOT_INITCTL, which uses "initctl" + result = domain.reboot(0x04) + if result==0: logger.log("tools: REBOOT %s" % (domain.name()) ) + else: + raise Exception() + except Exception, e: + logger.log("tools: FAILED to reboot %s (%s)" % (domain.name(), e) ) + logger.log("tools: Trying to DESTROY/CREATE %s instead..." % (domain.name()) ) + try: + result = domain.destroy() + if result==0: logger.log("tools: DESTROYED %s" % (domain.name()) ) + else: logger.log("tools: FAILED in the DESTROY call of %s" % (domain.name()) ) + result = domain.create() + if result==0: logger.log("tools: CREATED %s" % (domain.name()) ) + else: logger.log("tools: FAILED in the CREATE call of %s" % (domain.name()) ) + except Exception, e: + logger.log("tools: FAILED to DESTROY/CREATE %s (%s)" % (domain.name(), e) ) ################################################### # Author: Guilherme Sperb Machado @@ -521,48 +448,61 @@ def reboot_slivers(): ################################################### def get_hosts_file_path(slicename): containerDir = os.path.join(sliver_lxc.Sliver_LXC.CON_BASE_DIR, slicename) - logger.log("tools: %s" % (containerDir) ) return os.path.join(containerDir, 'etc', 'hosts') ################################################### # Author: Guilherme Sperb Machado ################################################### -# Search if there is a specific ipv6 address in the /etc/hosts file of a given slice +# Search if there is a specific ipv6 address in the +# /etc/hosts file of a given slice +# If the parameter 'ipv6addr' is None, then search +# for any ipv6 address ################################################### def search_ipv6addr_hosts(slicename, ipv6addr): 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 + if ipv6addr is not None: + if re.search(r'%s' % (ipv6addr), line): + found=True + else: + search = re.search(r'^(.*)\s+.*$', line) + if search: + ipv6candidate = search.group(1) + ipv6candidatestrip = ipv6candidate.strip() + valid = is_valid_ipv6(ipv6candidatestrip) + if valid: + found=True fileinput.close() return found except: - logger.log("tools: error when finding ipv6 address %s in the /etc/hosts file of slice=%s" % (ipv6addr, slicename) ) + logger.log("tools: FAILED to search %s in /etc/hosts file of slice=%s" % \ + (ipv6addr, slicename) ) ################################################### # Author: Guilherme Sperb Machado ################################################### -# Removes all ipv6 addresses from the /etc/hosts file of a given slice +# Removes all ipv6 addresses from the /etc/hosts +# file of a given slice ################################################### def remove_all_ipv6addr_hosts(slicename, node): hostsFilePath = get_hosts_file_path(slicename) try: for line in fileinput.input(r'%s' % (hostsFilePath), inplace=True): - logger.log("tools: line=%s" % (line) ) search = re.search(r'^(.*)\s+(%s|%s)$' % (node,'localhost'), line) if search: ipv6candidate = search.group(1) ipv6candidatestrip = ipv6candidate.strip() - logger.log("tools: group1=%s" % (ipv6candidatestrip) ) valid = is_valid_ipv6(ipv6candidatestrip) if not valid: - logger.log("tools: address=%s not valid" % (ipv6candidatestrip) ) print line, fileinput.close() + logger.log("tools: REMOVED IPv6 address from /etc/hosts file of slice=%s" % \ + (slicename) ) except: - logger.log("tools: could not delete the ipv6 address from the hosts file of slice=%s" % (slicename) ) + logger.log("tools: FAILED to remove the IPv6 address from /etc/hosts file of slice=%s" % \ + (slicename) ) ################################################### # Author: Guilherme Sperb Machado @@ -577,12 +517,13 @@ def add_ipv6addr_hosts_line(slicename, node, ipv6addr): #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() + logger.log("tools: ADDED IPv6 address to /etc/hosts file of slice=%s" % \ + (slicename) ) except: - logger.log("tools: could not add the IPv6 address to the hosts file of slice=%s" % (slicename) ) + logger.log("tools: FAILED to add the IPv6 address to /etc/hosts file of slice=%s" % \ + (slicename) )