Help to prepare script for monitor services


 
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# 1  
Old 03-20-2020
Help to prepare script for monitor services

I need to monitor services in rhel 8
below are the service......
crond
chronyd
rsyslogd
sshd
sssd
firewalld

Scripts..........
Code:
#!/bin/bash
for i in "${SERVICES[@]}"
do
###CHECK SERVICE####
`pgrep $i `
STATS=(echo $?)

if [  $STATS == 0  ]
then
echo   "$i is running"
else
echo   "$i is not running"
fi
done

but after run script, output does not come. please help, where is the problem in scripts.

--- Post updated at 07:17 PM ---

I prepared another script. but getting error.

Code:
#!/bin/bash
for i in `cat SERVICES`
do
###CHECK SERVICE####
status=systemctl | grep running |grep $i |awk '{print $4}'
if [ $status -eq running ]
then
     echo "$i is running"
else
     echo "$i is not running"
fi
done

Output-

[root@localhost ~]# sh service1.sh
service1.sh: line 6: [: -eq: unary operator expected
crond is not running
service1.sh: line 6: [: -eq: unary operator expected
chronyd is not running
service1.sh: line 6: [: -eq: unary operator expected
rsyslogd is not running
service1.sh: line 6: [: -eq: unary operator expected
sshd is not running
service1.sh: line 6: [: -eq: unary operator expected
sssd is not running
service1.sh: line 6: [: -eq: unary operator expected
firewalld is not running


Why it is coming error.
# 2  
Old 03-20-2020
In your first script, you're both too generous, and not enough, with "command substitutions". Try
Code:
for i in "${SERVICES[@]}"
  do    pgrep $i >/dev/null
        STATS=$?
        if [  $STATS == 0  ]
          then  echo   "$i is running"
          else  echo   "$i is not running"
        fi
  done
crond is not running
chronyd is not running
rsyslogd is running
sshd is not running
sssd is not running
firewalld is not running

You could reduce that to
Code:
for i in "${SERVICES[@]}"
  do    if pgrep $i >/dev/null
          then  echo   "$i is running"
          else  echo   "$i is not running"
        fi
  done

EDIT: or even
Code:
for i in "${SERVICES[@]}"
  do    echo "$i is $(pgrep $i >/dev/null || echo not\ )running"
  done

EDIT 2: pertaining to your second script, -eq compares integer values, not strings. Use = .
EDIT 3: in case you can drop the non-running services print out, try taking advantage of pgrep's pattern evaluation capability for a single command line:
Code:
printf "%0.0s%s is running.\n" $(IFS=\|; pgrep -l "${SERVICES[*]}")
rsyslogd is running.
firefox is running.


Last edited by RudiC; 03-20-2020 at 10:13 AM..
This User Gave Thanks to RudiC For This Post:
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