Skip to content

Commit

Permalink
Fix cluster plugin dlm lockdump for el6
Browse files Browse the repository at this point in the history
  • Loading branch information
@bmr-cymru
bmr-cymru committed Feb 3, 2011
1 parent d287960 commit 169d0ce
Showing 1 changed file with 64 additions and 242 deletions.
306 changes: 64 additions & 242 deletions sos/plugins/cluster.py
View file
Expand Up @@ -14,12 +14,12 @@

import sos.plugintools
import os, re
import time, libxml2
import glob
from glob import glob

class cluster(sos.plugintools.PluginBase):
"""cluster suite and GFS related information
"""

optionList = [("gfslockdump", 'gather output of gfs lockdumps', 'slow', False),
('lockdump', 'gather dlm lockdumps', 'slow', False)]

Expand All @@ -40,270 +40,92 @@ def checkenabled(self):
self.files = [ "/etc/cluster/cluster.conf" ]
return sos.plugintools.PluginBase.checkenabled(self)

def has_gfs(self):
return (len(self.doRegexFindAll(r'^\S+\s+\S+\s+gfs\s+.*$', "/etc/mtab")) > 0)

def diagnose(self):
def setup(self):
rhelver = self.policy().rhelVersion()

# check if the minimum set of packages is installed
# for RHEL4 RHCS(ccs, cman, cman-kernel, magma, magma-plugins, (dlm, dlm-kernel) || gulm, perl-Net-Telnet, rgmanager, fence)
# RHEL4 GFS (GFS, GFS-kernel, ccs, lvm2-cluster, fence)

pkgs_check = []
mods_check = []
serv_check = []

if rhelver == 4:
pkgs_check.extend( [ "ccs", "cman", "magma", "magma-plugins", "perl-Net-Telnet", "rgmanager", "fence" ] )
mods_check.extend( [ "cman", "dlm" ] )
if self.has_gfs():
mods_check.append("gfs")
serv_check.extend( [ "cman", "ccsd", "rgmanager", "fenced" ] )
if self.has_gfs():
serv_check.extend( ["gfs", "clvmd"] )
elif rhelver == 5:
pkgs_check.extend ( [ "cman", "perl-Net-Telnet", "rgmanager" ] )
mods_check.extend( [ "dlm" ] )
if self.has_gfs():
mods_check.extend( ["gfs", "gfs2"] )
serv_check.extend( [ "cman", "rgmanager" ] )
if self.has_gfs():
serv_check.extend( ["gfs", "clvmd"] )
elif rhelver == 6:
serv_check.extend( [ "fenced", "corosync", "dlm_controld"] )
if self.has_gfs():
serv_check.extend( ["gfs_controld"] )

# check that kernel module packages are installed for
# running kernel version

for modname in mods_check:
found = 0

if self.policy().allPkgsByNameRegex( "^" + modname ):
found = 1

ret, out, time = self.callExtProg('/sbin/modinfo -F vermagic ' + modname)

if ret == 0:
found = 2

if len(self.fileGrep("^%s\s+" % modname, "/proc/modules")) > 0:
found = 3

if found == 0:
self.addDiagnose("required kernel module is missing: %s" % modname)
elif found == 1:
self.addDiagnose("required module is not available for current kernel: %s" % modname)
elif found == 2:
self.addDiagnose("required module is available but not loaded: %s" % modname)

for pkg in pkgs_check:
if not self.isInstalled(pkg):
self.addDiagnose("required package is missing: %s" % pkg)

if rhelver == "4":
# (dlm, dlm-kernel) || gulm
if not ((self.isInstalled("dlm") and self.isInstalled("dlm-kernel")) or self.isInstalled("gulm")):
self.addDiagnose("required packages are missing: (dlm, dlm-kernel) || gulm")

# check if all the needed daemons are active at sosreport time
# check if they are started at boot time in RHEL4 RHCS (cman, ccsd, rgmanager, fenced)
# and GFS (gfs, ccsd, clvmd, fenced)

for service in serv_check:
ret, out, time = self.callExtProg("/sbin/service %s status &> /dev/null" % service)
if ret != 0:
self.addDiagnose("service %s is not running" % service)

if not self.policy().runlevelDefault() in self.policy().runlevelByService(service):
self.addDiagnose("service %s is not started in default runlevel" % service)

# FIXME: missing important cman services
# FIXME: any cman service whose state != run ?
# Fence Domain: "default" 2 2 run -

# is cluster quorate
if not self.is_cluster_quorate():
self.addDiagnose("cluster node is not quorate")

# if there is no cluster.conf, diagnose() finishes here.
try:
os.stat("/etc/cluster/cluster.conf")
except:
self.addDiagnose("/etc/cluster/cluster.conf is missing")
return

# setup XML xpath context
xml = libxml2.parseFile("/etc/cluster/cluster.conf")
xpathContext = xml.xpathNewContext()

# make sure that the node names are valid according to RFC 2181
for hostname in xpathContext.xpathEval('/cluster/clusternodes/clusternode/@name'):
if not re.match('^[a-zA-Z]([a-zA-Z0-9-]*[a-zA-Z0-9])?(\.[a-zA-Z]([a-zA-Z0-9-]*[a-zA-Z0-9])?)*$', hostname.content):
self.addDiagnose("node name (%s) contains invalid characters" % hostname.content)

# do not rely on DNS to resolve node names, must have them in /etc/hosts
for hostname in xpathContext.xpathEval('/cluster/clusternodes/clusternode/@name'):
if len(self.fileGrep(r'^.*\W+%s' % hostname.content , "/etc/hosts")) == 0:
self.addDiagnose("node %s is not defined in /etc/hosts" % hostname.content)

# check fencing (warn on no fencing)
if len(xpathContext.xpathEval("/cluster/clusternodes/clusternode[not(fence/method/device)]")):
if self.has_gfs():
self.addDiagnose("one or more nodes have no fencing agent configured: fencing is required for GFS to work")
else:
self.addDiagnose("one or more nodes have no fencing agent configured: the cluster infrastructure might not work as intended")

# check fencing (warn on manual)
if len(xpathContext.xpathEval("/cluster/clusternodes/clusternode[/cluster/fencedevices/fencedevice[@agent='fence_manual']/@name=fence/method/device/@name]")):
self.addDiagnose("one or more nodes have manual fencing agent configured (data integrity is not guaranteed)")

# if fence_ilo or fence_drac, make sure acpid is not running
ret, hostname, time = self.callExtProg("/bin/uname -n")
hostname = hostname.split(".")[0]
if len(xpathContext.xpathEval('/cluster/clusternodes/clusternode[@name = "%s" and /cluster/fencedevices/fencedevice[@agent="fence_rsa" or @agent="fence_drac"]/@name=fence/method/device/@name]' % hostname )):
ret, out, time = self.callExtProg("/sbin/service acpid status")
if ret == 0 or self.policy().runlevelDefault() in self.policy().runlevelByService("acpid"):
self.addDiagnose("acpid is enabled, this may cause problems with your fencing method.")

# check for fs exported via nfs without nfsid attribute
if len(xpathContext.xpathEval("/cluster/rm/service//fs[not(@fsid)]/nfsexport")):
for xmlNode in xpathContext.xpathEval("/cluster/rm/service//fs[not(@fsid)]"):
fsRefAttribute = xmlNode.xpathEval("@ref")
if (len(fsRefAttribute) > 0) :
fsRefName = fsRefAttribute[0].content
if len(xpathContext.xpathEval("cluster/rm/resources/fs[@name='%s'][not(@fsid)]" % fsRefName)):
self.addDiagnose("one or more nfs export do not have a fsid attribute set.")
break
else:
self.addDiagnose("one or more nfs export do not have a fsid attribute set.")

# cluster.conf file version and the in-memory cluster configuration version matches
status, cluster_version, time = self.callExtProg("cman_tool status | grep 'Config version'")
if not status:
cluster_version = cluster_version[16:]
else:
cluster_version = None
conf_version = xpathContext.xpathEval("/cluster/@config_version")[0].content

if status == 0 and conf_version != cluster_version:
self.addDiagnose("cluster.conf and in-memory configuration version differ (%s != %s)" % (conf_version, cluster_version) )

status, output, time = self.callExtProg("/usr/sbin/rg_test test /etc/cluster/cluster.conf")
if output.find("Error: ") > 0:
self.addDiagnose("configuration errors are present according to rg_test")

# make sure the first part of the lock table matches the cluster name
# and that the locking protocol is sane
cluster_name = xpathContext.xpathEval("/cluster/@name")[0].content

for fs in self.fileGrep(r'^[^#][/\w]*\W*[/\w]*\W*gfs', "/etc/fstab"):
# for each gfs entry
fs = fs.split()
lockproto = self.get_gfs_sb_field(fs[0], "sb_lockproto")
if lockproto and lockproto != self.get_locking_proto():
self.addDiagnose("gfs mountpoint (%s) is using the wrong locking protocol (%s)" % (fs[0], lockproto) )

locktable = self.get_gfs_sb_field(fs[0], "sb_locktable")
try: locktable = locktable.split(":")[0]
except: continue
if locktable != cluster_name:
self.addDiagnose("gfs mountpoint (%s) is using the wrong locking table" % fs[0])

# Check for existence of weak-updates in gfs2 prior to 2.6.18-128
if rhelver == 5:
ret, vermagic, time = self.callExtProg("modinfo -F vermagic gfs2")
# just kernel release from vermagic line
vermagic = vermagic.split()[0].lstrip('2.6.18-')
vermagic = vermagic[:vermagic.find('.')]
if int(vermagic) < 128:
self.addDiagnose('GFS2 is being used via weak-updates, kmod-gfs2 should be uninstalled and system reboot' \
'to allow for kernel provided gfs2 module to be used.')

def setup(self):
self.collectExtOutput("/sbin/fdisk -l")
self.addCopySpec("/etc/cluster.conf")
self.addCopySpec("/etc/cluster.xml")
self.addCopySpec("/etc/cluster")
self.addCopySpec("/etc/sysconfig/cluster")
self.addCopySpec("/etc/sysconfig/cman")
self.addCopySpec("/var/lib/ricci")
self.addCopySpec("/var/lib/luci")
self.addCopySpec("/var/log/cluster")
self.addCopySpec("/var/log/luci/luci.log")

if self.getOption('gfslockdump'):
self.do_gfslockdump()

if self.getOption('lockdump'):
self.do_lockdump()

self.collectExtOutput("/usr/sbin/rg_test test /etc/cluster/cluster.conf")
self.collectExtOutput("cman_tool status")
self.collectExtOutput("cman_tool -a nodes")
self.collectOutputNow("group_tool ls -g1")
self.collectOutputNow("group_tool dump")
self.collectExtOutput("ccs_tool lsnode")
self.collectExtOutput("fence_tool ls -n")
self.collectExtOutput("dlm_tool ls -n")
self.collectExtOutput("gfs_control ls -n")
self.collectExtOutput("fence_tool dump", root_symlink="fenced.txt")
self.collectExtOutput("dlm_tool dump", root_symlink="dlm_controld.txt")
self.collectExtOutput("gfs_control dump", root_symlink="gfs_controld.txt")
self.collectExtOutput("dlm_tool log_plock", root_symlink="log_plock.txt")
self.addCopySpec("/var/log/cluster")
self.addCopySpec("/var/log/luci/luci.log")

self.collectExtOutput("clustat")
self.collectExtOutput("dlm_tool log_plock")

self.collectExtOutput("/sbin/fdisk -l")
self.collectOutputNow("clustat")
self.collectOutputNow("group_tool dump")
self.collectExtOutput("cman_tool services")
self.collectExtOutput("cman_tool nodes")
self.collectExtOutput("cman_tool status")
self.collectExtOutput("ccs_tool lsnode")
self.collectExtOutput("/sbin/ipvsadm -L")

if self.getOption('gfslockdump'): self.do_gfslockdump()
if self.getOption('lockdump'): self.do_lockdump()

return
if rhelver is 4:
self.addCopySpec("/proc/cluster/*")
self.collectExtOutput("cman_tool nodes")

if rhelver is not 4: # 5+
self.collectExtOutput("cman_tool -a nodes")

if rhelver is 5:
self.collectExtOutput("group_tool -v")
self.collectExtOutput("group_tool dump fence")
self.collectExtOutput("group_tool dump gfs")

if rhelver not in (4,5): # 6+
self.collectExtOutput("corosync-quorumtool -l")
self.collectExtOutput("corosync-quorumtool -s")
self.collectExtOutput("corosync-cpgtool")
self.collectExtOutput("corosync-objctl")
self.collectExtOutput("group_tool ls -g1")
self.collectExtOutput("gfs_control ls -n")
self.collectExtOutput("gfs_control dump")
self.collectExtOutput("fence_tool dump")
self.collectExtOutput("dlm_tool dump")
self.collectExtOutput("dlm_tool ls -n")

def do_lockdump(self):
status, output, time= self.callExtProg("cman_tool services")
if status:
# command somehow failed
return False

rhelver = self.policy().rhelVersion()

if rhelver == "4":
regex = r'^DLM Lock Space:\s*"([^"]*)".*$'
elif rhelver == "5Server" or rhelver == "5Client":
regex = r'^dlm\s+[^\s]+\s+([^\s]+)\s.*$'

reg=re.compile(regex,re.MULTILINE)
for lockspace in reg.findall(output):
ret, out, time = self.callExtProg("echo %s > /proc/cluster/dlm_locks" % lockspace)
self.collectOutputNow("cat /proc/cluster/dlm_locks", root_symlink = "dlm_locks_%s" % lockspace)

def get_locking_proto(self):
# FIXME: what's the best way to find out ?
return "lock_dlm"
return "lock_gulm"
if rhelver is 4:
status, output, time = self.callExtProg("cman_tool services")
for lockspace in re.compile(r'^DLM Lock Space:\s*"([^"]*)".*$', re.MULTILINE).findall(output):
self.callExtProg("echo %s > /proc/cluster/dlm_locks" % lockspace)
self.collectOutputNow("cat /proc/cluster/dlm_locks",
suggest_filename = "dlm_locks_%s" % lockspace)

if rhelver is 5:
status, output, time = self.callExtProg("group_tool")
for lockspace in re.compile(r'^dlm\s+[^\s]+\s+([^\s]+)$', re.MULTILINE).findall(output):
self.collectExtOutput("dlm_tool lockdebug '%s'" % lockspace,
suggest_filename = "dlm_locks_%s" % lockspace)

else: # RHEL6 or recent Fedora
status, output, time = self.callExtProg("dlm_tool ls")
for lockspace in re.compile(r'^name\s+([^\s]+)$', re.MULTILINE).findall(output):
self.collectExtOutput("dlm_tool lockdebug -svw '%s'" % lockspace,
suggest_filename = "dlm_locks_%s" % lockspace)

def do_gfslockdump(self):
for mntpoint in self.doRegexFindAll(r'^\S+\s+([^\s]+)\s+gfs\s+.*$', "/proc/mounts"):
self.collectExtOutput("/sbin/gfs_tool lockdump %s" % mntpoint, root_symlink = "gfs_lockdump_" + self.mangleCommand(mntpoint) )

def do_rgmanager_bt(self):
# FIXME: threads backtrace via SIGALRM
return
self.collectExtOutput("/sbin/gfs_tool lockdump %s" % mntpoint,
suggest_filename = "gfs_lockdump_" + self.mangleCommand(mntpoint))

def postproc(self):
for cluster_conf in glob.glob("/etc/cluster/cluster.conf*"):
for cluster_conf in glob("/etc/cluster/cluster.conf*"):
self.doRegexSub(cluster_conf, r"(\s*\<fencedevice\s*.*\s*passwd\s*=\s*)\S+(\")", r"\1%s" %('"***"'))
return

def is_cluster_quorate(self):
ret, output, time = self.callExtProg("cman_tool status | grep '^Membership state: '")
try:
if output[18:] == "Cluster-Member":
return True
except:
pass
return False

def get_gfs_sb_field(self, device, field):
for ret, line, time in self.callExtProg("/sbin/gfs_tool sb %s all" % device).split("\n"):
if re.match('^\W*%s = ' % field, line):
return line.split("=")[1].strip()
return False

0 comments on commit 169d0ce

Please sign in to comment.