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|
#! /bin/sh
#
# Copyright (c) 2013-2014 Red Hat.
# Copyright (c) 1998-2000,2003 Silicon Graphics, Inc. All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# Administrative script to check pmie processes are alive, and restart
# them as required.
#
# Get standard environment
. $PCP_DIR/etc/pcp.env
. $PCP_SHARE_DIR/lib/rc-proc.sh
PMIE=pmie
PMIECONF="$PCP_BIN_DIR/pmieconf"
# error messages should go to stderr, not the GUI notifiers
unset PCP_STDERR
# added to handle problem when /var/log/pcp is a symlink, as first
# reported by Micah_Altman@harvard.edu in Nov 2001
#
_unsymlink_path()
{
[ -z "$1" ] && return
__d=`dirname $1`
__real_d=`cd $__d 2>/dev/null && $PWDCMND`
if [ -z "$__real_d" ]
then
echo $1
else
echo $__real_d/`basename $1`
fi
}
# constant setup
#
tmp=`mktemp -d /tmp/pcp.XXXXXXXXX` || exit 1
status=0
echo >$tmp/lock
trap "rm -rf \`[ -f $tmp/lock ] && cat $tmp/lock\` $tmp; exit \$status" 0 1 2 3 15
prog=`basename $0`
# control file for pmie administration ... edit the entries in this
# file to reflect your local configuration
#
CONTROL=$PCP_PMIECONTROL_PATH
# NB: FQDN cleanup; don't guess a 'real name for localhost', and
# definitely don't truncate it a la `hostname -s`. Instead now
# we use such a string only for the default log subdirectory, ie.
# for substituting LOCALHOSTNAME in the third column of $CONTROL.
# determine path for pwd command to override shell built-in
PWDCMND=`which pwd 2>/dev/null | $PCP_AWK_PROG '
BEGIN { i = 0 }
/ not in / { i = 1 }
/ aliased to / { i = 1 }
{ if ( i == 0 ) print }
'`
[ -z "$PWDCMND" ] && PWDCMND=/bin/pwd
eval $PWDCMND -P >/dev/null 2>&1
[ $? -eq 0 ] && PWDCMND="$PWDCMND -P"
here=`$PWDCMND`
# determine whether we can automatically enable any events sinks
CONFARGS="-cF"
if which esplogger >/dev/null 2>&1
then
CONFARGS='m global syslog_prefix $esp_prefix$'
fi
# option parsing
#
SHOWME=false
MV=mv
RM=rm
CP=cp
KILL=pmsignal
TERSE=false
VERBOSE=false
VERY_VERBOSE=false
CHECK_RUNLEVEL=false
START_PMIE=true
echo > $tmp/usage
cat >> $tmp/usage << EOF
Options:
-c=FILE,--control=FILE configuration of pmie instances to manage
-C query system service runlevel information
-N,--showme perform a dry run, showing what would be done
-s,--stop stop pmie processes instead of starting them
-T,--terse produce a terser form of output
-V,--verbose increase diagnostic verbosity
--help
EOF
ARGS=`pmgetopt --progname=$prog --config=$tmp/usage -- "$@"`
[ $? != 0 ] && exit 1
eval set -- "$ARGS"
while [ $# -gt 0 ]
do
case "$1"
in
-c) CONTROL="$2"
shift
;;
-C) CHECK_RUNLEVEL=true
;;
-N) SHOWME=true
MV="echo + mv"
RM="echo + rm"
CP="echo + cp"
KILL="echo + kill"
;;
-s) START_PMIE=false
;;
-T) TERSE=true
;;
-V) if $VERBOSE
then
VERY_VERBOSE=true
else
VERBOSE=true
fi
;;
--) shift
break
;;
-\?) pmgetopt --usage --progname=$prog --config=$tmp/usage
status=1
exit
;;
esac
shift
done
if [ $# -ne 0 ]
then
pmgetopt --usage --progname=$prog --config=$tmp/usage
status=1
exit
fi
_error()
{
echo "$prog: [$CONTROL:$line]"
echo "Error: $1"
echo "... automated performance reasoning for host \"$host\" unchanged"
touch $tmp/err
}
_warning()
{
echo "$prog [$CONTROL:$line]"
echo "Warning: $1"
}
_message()
{
case $1
in
'restart')
$PCP_ECHO_PROG $PCP_ECHO_N "Restarting pmie for host \"$host\" ...""$PCP_ECHO_C"
;;
esac
}
_lock()
{
# demand mutual exclusion
#
rm -f $tmp/stamp
delay=200 # tenths of a second
while [ $delay -ne 0 ]
do
if pmlock -v $logfile.lock >$tmp/out
then
echo $logfile.lock >$tmp/lock
break
else
if [ ! -f $tmp/stamp ]
then
touch -t `pmdate -30M %Y%m%d%H%M` $tmp/stamp
fi
if [ -n "`find $logfile.lock ! -newer $tmp/stamp -print 2>/dev/null`" ]
then
_warning "removing lock file older than 30 minutes"
ls -l $logfile.lock
rm -f $logfile.lock
fi
fi
pmsleep 0.1
delay=`expr $delay - 1`
done
if [ $delay -eq 0 ]
then
# failed to gain mutex lock
#
if [ -f $logfile.lock ]
then
_warning "is another PCP cron job running concurrently?"
ls -l $logfile.lock
else
echo "$prog: `cat $tmp/out`"
fi
_warning "failed to acquire exclusive lock ($logfile.lock) ..."
continue
fi
}
_unlock()
{
rm -f $logfile.lock
echo >$tmp/lock
}
_check_logfile()
{
if [ ! -f $logfile ]
then
echo "$prog: Error: cannot find pmie output file at \"$logfile\""
if $TERSE
then
:
else
logdir=`dirname $logfile`
echo "Directory (`cd $logdir; $PWDCMND`) contents:"
LC_TIME=POSIX ls -la $logdir
fi
else
echo "Contents of pmie output file \"$logfile\" ..."
cat $logfile
fi
}
_check_pmie()
{
$VERBOSE && $PCP_ECHO_PROG $PCP_ECHO_N " [process $1] ""$PCP_ECHO_C"
# wait until pmie process starts, or exits
#
delay=5
[ ! -z "$PMCD_CONNECT_TIMEOUT" ] && delay=$PMCD_CONNECT_TIMEOUT
x=5
[ ! -z "$PMCD_REQUEST_TIMEOUT" ] && x=$PMCD_REQUEST_TIMEOUT
# wait for maximum time of a connection and 20 requests
#
delay=`expr \( $delay + 20 \* $x \) \* 10` # tenths of a second
while [ $delay -ne 0 ]
do
if [ -f $logfile ]
then
# $logfile was previously removed, if it has appeared again then
# we know pmie has started ... if not just sleep and try again
#
if ls "$PCP_TMP_DIR/pmie/$1" >$tmp/out 2>&1
then
if grep "No such file or directory" $tmp/out >/dev/null
then
:
else
$VERBOSE && echo " done"
return 0
fi
fi
_plist=`_get_pids_by_name pmie`
_found=false
for _p in `echo $_plist`
do
[ $_p -eq $1 ] && _found=true
done
if $_found
then
# process still here, just hasn't created its status file
# yet, try again
:
else
$VERBOSE || _message restart
echo " process exited!"
if $TERSE
then
:
else
echo "$prog: Error: failed to restart pmie"
echo "Current pmie processes:"
$PCP_PS_PROG $PCP_PS_ALL_FLAGS | tee $tmp/tmp | sed -n -e 1p
for _p in `echo $_plist`
do
sed -n -e "/^[ ]*[^ ]* [ ]*$_p /p" < $tmp/tmp
done
echo
fi
_check_logfile
return 1
fi
fi
pmsleep 0.1
delay=`expr $delay - 1`
$VERBOSE && [ `expr $delay % 10` -eq 0 ] && \
$PCP_ECHO_PROG $PCP_ECHO_N ".""$PCP_ECHO_C"
done
$VERBOSE || _message restart
echo " timed out waiting!"
if $TERSE
then
:
else
sed -e 's/^/ /' $tmp/out
fi
_check_logfile
return 1
}
_get_configfile()
{
# extract the pmie configuration file (-c) from a list of arguments
#
echo $@ | sed -n \
-e 's/^/ /' \
-e 's/[ ][ ]*/ /g' \
-e 's/-c /-c/' \
-e 's/.* -c\([^ ]*\).*/\1/p'
}
_configure_pmie()
{
# update a pmie configuration file if it should be created/modified
#
configfile="$1"
if [ -f "$configfile" ]
then
# look for "magic" string at start of file, and ensure we created it
sed 1q "$configfile" | grep '^// pmieconf-pmie [0-9]' >/dev/null
magic=$?
grep '^// Auto-generated by pmieconf' "$configfile" >/dev/null
owned=$?
if [ $magic -eq 0 -a $owned -eq 0 ]
then
# pmieconf file, see if re-generation is needed
cp "$configfile" $tmp/pmie
if $PMIECONF -f $tmp/pmie $CONFARGS >$tmp/diag 2>&1
then
grep -v "generated by pmieconf" "$configfile" >$tmp/old
grep -v "generated by pmieconf" $tmp/pmie >$tmp/new
if ! diff $tmp/old $tmp/new >/dev/null
then
if [ -w $configfile ]
then
$VERBOSE && echo "Reconfigured: \"$configfile\" (pmieconf)"
eval $CP $tmp/pmie "$configfile"
else
_warning "no write access to pmieconf file \"$configfile\", skip reconfiguration"
ls -l "$configfile"
fi
fi
else
_warning "pmieconf failed to reconfigure \"$configfile\""
cat "s;$tmp/pmie;$configfile;g" $tmp/diag
echo "=== start pmieconf file ==="
cat $tmp/pmie
echo "=== end pmieconf file ==="
fi
fi
elif [ ! -e "$configfile" ]
then
# file does not exist, generate it, if possible
if $SHOWME
then
echo "+ $PMIECONF -f $configfile $CONFARGS"
elif ! $PMIECONF -f "$configfile" $CONFARGS >$tmp/diag 2>&1
then
_warning "pmieconf failed to generate \"$configfile\""
cat $tmp/diag
echo "=== start pmieconf file ==="
cat "$configfile"
echo "=== end pmieconf file ==="
else
chown $PCP_USER:$PCP_GROUP "$configfile" >/dev/null 2>&1
fi
fi
}
QUIETLY=false
if [ $CHECK_RUNLEVEL = true ]
then
# determine whether to start/stop based on runlevel settings - we
# need to do this when running unilaterally from cron, else we'll
# always start pmie up (even when we shouldn't).
#
QUIETLY=true
if is_chkconfig_on pmie
then
START_PMIE=true
else
START_PMIE=false
fi
fi
if [ $START_PMIE = false ]
then
# if pmie has never been started, there's no work to do to stop it
[ ! -d "$PCP_TMP_DIR/pmie" ] && exit
$QUIETLY || $PCP_BINADM_DIR/pmpost "stop pmie from $prog"
fi
if [ ! -f "$CONTROL" ]
then
echo "$prog: Error: cannot find control file ($CONTROL)"
status=1
exit
fi
# 1.0 is the first release, and the version is set in the control file
# with a $version=x.y line
#
version=1.0
eval `grep '^version=' "$CONTROL" | sort -rn`
if [ $version != "1.0" ]
then
_error "unsupported version (got $version, expected 1.0)"
status=1
exit
fi
echo >$tmp/dir
rm -f $tmp/err $tmp/pmies
line=0
cat "$CONTROL" \
| sed -e "s;PCP_LOG_DIR;$PCP_LOG_DIR;g" \
| while read host socks logfile args
do
# start in one place for each iteration (beware relative paths)
cd "$here"
line=`expr $line + 1`
# NB: FQDN cleanup: substitute the LOCALHOSTNAME marker in the config line
# differently for the directory and the pcp -h HOST arguments.
logfile_hostname=`hostname || echo localhost`
logfile=`echo $logfile | sed -e "s;LOCALHOSTNAME;$logfile_hostname;"`
logfile=`_unsymlink_path $logfile`
[ "x$host" = "xLOCALHOSTNAME" ] && host=local:
case "$host"
in
\#*|'') # comment or empty
continue
;;
\$*) # in-line variable assignment
$SHOWME && echo "# $host $socks $logfile $args"
cmd=`echo "$host $socks $logfile $args" \
| sed -n \
-e "/='/s/\(='[^']*'\).*/\1/" \
-e '/="/s/\(="[^"]*"\).*/\1/' \
-e '/=[^"'"'"']/s/[;&<>|].*$//' \
-e '/^\\$[A-Za-z][A-Za-z0-9_]*=/{
s/^\\$//
s/^\([A-Za-z][A-Za-z0-9_]*\)=/export \1; \1=/p
}'`
if [ -z "$cmd" ]
then
# in-line command, not a variable assignment
_warning "in-line command is not a variable assignment, line ignored"
else
case "$cmd"
in
'export PATH;'*)
_warning "cannot change \$PATH, line ignored"
;;
'export IFS;'*)
_warning "cannot change \$IFS, line ignored"
;;
*)
$SHOWME && echo "+ $cmd"
eval $cmd
;;
esac
fi
continue
;;
esac
if [ -z "$socks" -o -z "$logfile" -o -z "$args" ]
then
_error "insufficient fields in control file record"
continue
fi
$VERY_VERBOSE && echo "Check pmie -h $host -l $logfile ..."
# make sure output directory exists
#
dir=`dirname $logfile`
if [ ! -d "$dir" ]
then
mkdir -p -m 755 "$dir" >$tmp/err 2>&1
if [ ! -d "$dir" ]
then
cat $tmp/err
_error "cannot create directory ($dir) for pmie log file"
continue
fi
chown $PCP_USER:$PCP_GROUP "$dir" >/dev/null 2>&1
fi
cd "$dir"
dir=`$PWDCMND`
$SHOWME && echo "+ cd $dir"
# ensure pcp user will be able to write there
#
chown -R $PCP_USER:$PCP_GROUP "$dir" >/dev/null 2>&1
if [ ! -w "$dir" ]
then
_warning "no write access in $dir, skip lock file processing"
ls -ld "$dir"
else
_lock
fi
# match $logfile from control file to running pmies
pid=""
for file in $PCP_TMP_DIR/pmie/[0-9]*
do
[ "$file" = "$PCP_TMP_DIR/pmie/[0-9]*" ] && continue
$VERY_VERBOSE && $PCP_ECHO_PROG $PCP_ECHO_N "... try $file: ""$PCP_ECHO_C"
p_id=`echo $file | sed -e 's,.*/,,'`
p_logfile=""
p_pmcd_host=""
# throw away stderr in case $file has been removed by now
eval `$PCP_BINADM_DIR/pmiestatus $file 2>/dev/null | $PCP_AWK_PROG '
NR == 2 { printf "p_logfile=\"%s\"\n", $0; next }
NR == 3 { printf "p_pmcd_host=\"%s\"\n", $0; next }
{ next }'`
p_logfile=`_unsymlink_path $p_logfile`
if [ "$p_logfile" != $logfile ]
then
$VERY_VERBOSE && echo "different logfile, skip"
$VERY_VERBOSE && echo " $p_logfile differs to $logfile"
elif _get_pids_by_name pmie | grep "^$p_id\$" >/dev/null
then
$VERY_VERBOSE && echo "pmie process $p_id identified, OK"
pid=$p_id
break
else
$VERY_VERBOSE && echo "pmie process $p_id not running, skip"
$VERY_VERBOSE && _get_pids_by_name pmie
fi
done
if $VERY_VERBOSE
then
if [ -z "$pid" ]
then
echo "No current pmie process exists for:"
else
echo "Found pmie process $pid monitoring:"
fi
echo " host = $host"
echo " log file = $logfile"
fi
if [ -z "$pid" -a $START_PMIE = true ]
then
configfile=`_get_configfile $args`
if [ ! -z "$configfile" ]
then
# if this is a relative path and not relative to cwd,
# substitute in the default pmie search location.
#
if [ ! -f "$configfile" -a "`basename $configfile`" = "$configfile" ]
then
configfile="$PCP_SYSCONF_DIR/pmie/$configfile"
fi
# check configuration file exists and is up to date
_configure_pmie "$configfile" "$host"
fi
args="-h $host -l $logfile $args"
$VERBOSE && _message restart
sock_me=''
if [ "$socks" = y ]
then
# only check for pmsocks if it's specified in the control file
have_pmsocks=false
if which pmsocks >/dev/null 2>&1
then
# check if pmsocks has been set up correctly
if pmsocks ls >/dev/null 2>&1
then
have_pmsocks=true
fi
fi
if $have_pmsocks
then
sock_me="pmsocks "
else
echo "$prog: Warning: no pmsocks available, would run without"
sock_me=""
fi
fi
[ -f "$logfile" ] && eval $MV -f "$logfile" "$logfile.prior"
if $SHOWME
then
$VERBOSE && echo
echo "+ ${sock_me}$PMIE -b $args"
_unlock
continue
else
# since this is launched as a sort of daemon, any output should
# go on pmie's stderr, i.e. $logfile ... use -b for this
#
$VERY_VERBOSE && ( echo; $PCP_ECHO_PROG $PCP_ECHO_N "+ ${sock_me}$PMIE -b $args""$PCP_ECHO_C"; echo "..." )
$PCP_BINADM_DIR/pmpost "start pmie from $prog for host $host"
${sock_me}$PMIE -b $args &
pid=$!
fi
# wait for pmie to get started, and check on its health
_check_pmie $pid
elif [ ! -z "$pid" -a $START_PMIE = false ]
then
# Send pmie a SIGTERM, which is noted as a pending shutdown.
# Add pid to list of pmies sent SIGTERM - may need SIGKILL later.
#
$VERY_VERBOSE && echo "+ $KILL -s TERM $pid"
eval $KILL -s TERM $pid
$PCP_ECHO_PROG $PCP_ECHO_N "$pid ""$PCP_ECHO_C" >> $tmp/pmies
fi
_unlock
done
# check all the SIGTERM'd pmies really died - if not, use a bigger hammer.
#
if $SHOWME
then
:
elif [ $START_PMIE = false -a -s $tmp/pmies ]
then
pmielist=`cat $tmp/pmies`
if ps -p "$pmielist" >/dev/null 2>&1
then
$VERY_VERBOSE && ( echo; $PCP_ECHO_PROG $PCP_ECHO_N "+ $KILL -KILL `cat $tmp/pmies` ...""$PCP_ECHO_C" )
eval $KILL -s KILL $pmielist >/dev/null 2>&1
delay=30 # tenths of a second
while ps -f -p "$pmielist" >$tmp/alive 2>&1
do
if [ $delay -gt 0 ]
then
pmsleep 0.1
delay=`expr $delay - 1`
continue
fi
echo "$prog: Error: pmie process(es) will not die"
cat $tmp/alive
status=1
break
done
fi
fi
[ -f $tmp/err ] && status=1
exit
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