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IML Open Source
icinga-checks
Commits
a07c2727
Commit
a07c2727
authored
2 years ago
by
Hahn Axel (hahn)
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WIP add fisrt lines for psql check
parent
96c67987
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!85
6010 check pqsql
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a07c2727
#!/bin/bash
# ======================================================================
#
# !!! WORK IN PROGRESS !!! DO NOT USE YET !!!
#
# Check PSQL SERVER
#
# requirements:
# - psql client
#
# installation:
# - execute check_psqlserver -i
#
# ----------------------------------------------------------------------
# 2023-06-xx v0.0 <axel.hahn@unibe.ch>
# ======================================================================
.
`
dirname
$0
`
/inc_pluginfunctions
_version
=
"0.1"
# --- set HOME
HOME
=
/etc/icinga2-passive-client
# HOME=/etc/icingaclient
# --- other vars...
cfgfile
=
$HOME
/.psql.conf
myuser
=
icingamonitor
datafile
=
/tmp/psqlvars.out
# new line
NL
=
"
"
lastvalue
=
out
=
" "
# ----------------------------------------------------------------------
# FUNCTIONS
# ----------------------------------------------------------------------
# uninstall database user
function
_uninstall
(){
echo
UNINSTALL ...
su - postgres
-c
"psql -c
\"
DROP USER
${
myuser
}
;
\"
"
unset
PGHOST
unset
PGUSER
unset
PGPASSWORD
}
# (re)install database user for monitoring
function
_install
(){
echo
INSTALLING ...
local
pwlength
=
64
echo
"- check psql connection..."
su postgres
-c
"psql -V postgres"
if
[
$?
-ne
0
]
;
then
echo
"ERROR: psql connect without password failed."
exit
1
fi
echo
"- creating mysql user
$myuser
@localhost with random password (
$pwlength
chars)..."
mypw
=
$(
head
/dev/urandom |
tr
-dc
A-Za-z0-9 |
head
-c
$pwlength
)
SQL1
=
"CREATE USER
${
myuser
}
WITH PASSWORD '
${
mypw
}
' CONNECTION LIMIT 5"
;
SQL2
=
"GRANT pg_monitor TO
${
myuser
}
;"
# SQL2="GRANT MONITOR_QUERIES TO ${myuser};"
su - postgres
-c
"psql -c
\"
${
SQL1
}
\"
"
if
[
$?
-ne
0
]
;
then
echo
"ERROR: psql command to create user failed."
exit
1
fi
echo
"- grant ..."
su - postgres
-c
"psql -c
\"
${
SQL2
}
\"
"
if
[
$?
-ne
0
]
;
then
echo
"ERROR: psql command to grant permissions failed."
# exit 1
fi
echo
"- creating config file
$cfgfile
... "
cat
>
$cfgfile
<<
EOF
#
# generated on `date`
#
export PGUSER=
${
myuser
}
export PGPASSWORD=
${
mypw
}
export PGHOST=localhost
export PGDATABASE=postgres
EOF
ls
-l
$cfgfile
if
[
$?
-ne
0
]
;
then
echo
"ERROR: creation of config file failed."
exit
1
fi
}
function
_usage
(){
cat
<<
EOH
______________________________________________________________________
CHECK POSTGRESQL SERVER :: v
${
_version
}
(c) Institute for Medical Education - Univerity of Bern
Licence: GNU GPL 3
______________________________________________________________________
USAGE:
`basename
$0
` [OPTIONS] -m METHOD
OPTIONS:
-h this help
-i install monitoring user (must be executed as root)
-u uninstall monitoring user (must be executed as root)
PARAMETERS:
-m method; valid methods are:
connections current/ max connections
connects connects per min and aborted connections/ clients
commands current running statements insert, select, ...
qcache-blocks query cache blocks total vs free
qcache-queries cached / non cached queries; low memeory prunes
qcache-hits query cache efficiency: cached vs non cached and inserted
EXAMPLES:
`basename
$0
` -i
`basename
$0
` -m commands
EOH
}
function
_mysqlreadvars
(){
mysql
-e
"SHOW GLOBAL VARIABLES ;"
--skip-column-names
>
$datafile
mysql
-e
"SHOW STATUS ;"
--skip-column-names
>>
$datafile
}
function
_mysqlgetvar
()
{
local
sVarname
=
$1
lastvalue
=
`
grep
"^
$sVarname
[^_a-z]"
${
datafile
}
|
awk
'{ print $2 }'
`
echo
$lastvalue
}
# get a value from mysql status output
# param string variable name
# param string prefix to remove from beginning of variable
# param (set) flag if it is a delta value
function
_mysqlrendervar
()
{
local
sVarname
=
$1
local
sRemove
=
$2
local
sDeltaUnit
=
$3
local
sFloat
=
$4
# local iValue=`grep "^$sVarname[^_a-z]" ${datafile} | awk '{ print $2 }'`
local
iValue
=
`
_mysqlgetvar
"
$sVarname
"
`
if
[
"
$iValue
"
=
""
]
;
then
ph.abort
"no value for
${
sVarname
}
"
fi
# get label for perfdata
local
sLabel
=
`
echo
${
sVarname
}
|
sed
"s#^
${
sRemove
}
##g"
`
if
[
!
-z
$sDeltaUnit
]
;
then
local
iSpeed
=
`
ph.perfdeltaspeed
"mysql-
${
sVarname
}
"
${
iValue
}
$sDeltaUnit
$sFloat
`
out
=
$out
`
printf
"%25s: %10s %s
\n
"
"
${
sLabel
}
"
"
${
iValue
}
"
"... delta =
${
iSpeed
}
per
$sDeltaUnit
${
NL
}
"
`
ph.perfadd
"
${
sLabel
}
"
"
${
iSpeed
}
"
lastvalue
=
$iSpeed
else
out
=
${
out
}
`
printf
"%25s: %10s
\n
"
"
${
sLabel
}
"
"
${
iValue
}${
NL
}
"
`
ph.perfadd
"
${
sLabel
}
"
"
${
iValue
}
"
lastvalue
=
$iValue
fi
}
function
_mysqlrenderdelta
()
{
local
deltaUnit
=
$3
test
-z
$deltaUnit
&&
deltaUnit
=
"sec"
_mysqlrendervar
"
$1
"
"
$2
"
$deltaUnit
$4
}
function
renderCounts
(){
local
_query
=
"
$1
"
local
_out
=
$(
psql
-c
"
${
_query
}
"
)
# out+=$( echo "DEBUG: _query=${_query}${NL}" )
# echo "DEBUG: _out="; echo "${_out}"
typeset
-i
local
_iCounter
=
0
local
_header
=
$(
echo
"
${
_out
}
"
|
head
-1
|
tr
-d
' '
)
local
_data
=
$(
echo
"
${
_out
}
"
|
head
-3
|
tail
-1
|
tr
-d
' '
)
# echo "DEBUG: _header=${_header}"
IFS
=
"|"
read
-ra
aCols
<<<
"
$_header
"
read
-ra
aVals
<<<
"
$_data
"
for
sColumn
in
${
aCols
[*]
}
do
local
value
=
${
aVals
[
$_iCounter
]
}
# echo "DEBUG: $sColumn = $value"
out+
=
$(
printf
"%25s: %10s
\n
"
"
${
sColumn
}
"
"
${
value
}${
NL
}
"
)
ph.perfadd
"
${
sColumn
}
"
"
${
value
}
"
_iCounter+
=
1
done
}
# ----------------------------------------------------------------------
# MAIN
# ----------------------------------------------------------------------
bOptInstall
=
`
ph.hasParamoption
"i"
"
$@
"
`
bOptUninstall
=
`
ph.hasParamoption
"u"
"
$@
"
`
bOptHelp
=
`
ph.hasParamoption
"h"
"
$@
"
`
if
[
$bOptHelp
-eq
1
-o
$#
-lt
1
]
;
then
_usage
exit
0
fi
# --- check required tools
# ph.require mysql
# --- install
if
[
$bOptInstall
-eq
1
-a
"
$(
whoami
)
"
=
"root"
]
;
then
if
[
-f
$cfgfile
]
;
then
ph.status
"SKIP installation. config file already exists:
$cfgfile
."
ph.exit
fi
HOME
=
/root
export
HOME
_uninstall
_install
ph.status
"Installation was done"
ph.exit
fi
# --- uninstall
if
[
$bOptUninstall
-eq
1
-a
"
$(
whoami
)
"
=
"root"
]
;
then
HOME
=
/root
_uninstall
rm
-f
$cfgfile
ph.status
"Uninstalled."
ph.exit
fi
# --- check installation
grep
$myuser
$cfgfile
>
/dev/null 2>/dev/null
if
[
$?
-ne
0
]
;
then
ph.abort
"PSQL access not possible yet. You need to install the monitoring user first: as root execute
`
basename
$0
`
-i"
fi
# ----------------------------------------------------------------------
sMode
=
`
ph.getValueWithParam
''
m
"
$@
"
`
case
"
${
sMode
}
"
in
"dbstat"
)
descr
=
"stat database"
renderCounts
"select
\
sum(xact_commit) as commit,
\
sum(xact_rollback) as rollback,
\
sum(blks_read) as blkread,
\
sum(blks_hit) as blkhit
\
from pg_stat_database "
;;
"queries"
)
# psql -c "select * from pg_stat_activity "
# psql -c "select * from pg_stat_statements " -> av psql v11
;;
"connections"
)
descr
=
"current/ max connections"
_mysqlrendervar max_connections
typeset
-i
iMaxConn
=
$lastvalue
_mysqlrendervar Max_used_connections
typeset
-i
iMaxUsed
=
$lastvalue
typeset
-i
iMaxPercent
=
$iMaxUsed
*
100/
$iMaxConn
out
=
$out
" -->
$iMaxPercent
%
${
NL
}${
NL
}
"
_mysqlrendervar Threads_connected
typeset
-i
iThreads
=
$lastvalue
typeset
-i
iUsage
=
$iThreads
*
100/
$iMaxConn
out
=
$out
" -->
$iUsage
%
${
NL
}${
NL
}
"
if
[
$iWarnLimit
-gt
0
-a
$iCriticalLimit
-gt
0
]
;
then
ph.setStatusByLimit
$iUsage
$iWarnLimit
$iCriticalLimit
fi
_mysqlrendervar Questions
;;
"connects"
)
descr
=
"connects per min and aborted connections/ clients"
_mysqlrenderdelta Connections
""
min float
_mysqlrenderdelta Aborted_clients
""
min float
_mysqlrenderdelta Aborted_connects
""
min float
;;
"commands"
)
descr
=
"currently executed commands"
_mysqlrendervar Com_delete
"Com_"
_mysqlrendervar Com_insert
"Com_"
_mysqlrendervar Com_replace
"Com_"
_mysqlrendervar Com_select
"Com_"
_mysqlrendervar Com_update
"Com_"
;;
"qcache-blocks"
)
descr
=
"query cache blocks"
_mysqlgetvar
"have_query_cache"
|
grep
"YES"
>
/dev/null
||
ph.abort
"Query cache is not active"
_mysqlrendervar Qcache_total_blocks
"Qcache_"
_mysqlrendervar Qcache_free_blocks
"Qcache_"
;;
"qcache-queries"
)
descr
=
"query cache data"
_mysqlgetvar
"have_query_cache"
|
grep
"YES"
>
/dev/null
||
ph.abort
"Query cache is not active"
_mysqlrendervar Qcache_queries_in_cache
"Qcache_"
_mysqlrenderdelta Qcache_not_cached
"Qcache_"
min float
_mysqlrenderdelta Qcache_lowmem_prunes
"Qcache_"
min float
;;
"qcache-hits"
)
descr
=
"query cache hits"
_mysqlgetvar
"have_query_cache"
|
grep
"YES"
>
/dev/null
||
ph.abort
"Query cache is not active"
_mysqlrenderdelta Qcache_hits
"Qcache_"
min
_mysqlrenderdelta Qcache_inserts
"Qcache_"
min
_mysqlrenderdelta Qcache_not_cached
"Qcache_"
min
;;
*
)
echo
ERRROR:
[
${
sMode
}
]
is an INVALID mode
_usage
ph.abort
esac
ph.status
"Pgsql
$sMode
::
$descr
"
echo
"
$out
"
rm
-f
$datafile
ph.exit
# ----------------------------------------------------------------------
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