fs/check-nfs-hang.sh

   1 #!/bin/sh
   2
   3 if [ $# -lt 1 ]
   4 then
   5         echo "Usage: $0 <fs> [email]"
   6         echo "Where"
   7         echo "  fs              - file system to check"
   8         echo "  email           - send warning to specified e-mail address (print to stdout, if omitted)"
   9         echo "Example: $0 /srv/remoteshare admin@cutekittens.tld"
  10         exit 1
  11 fi
  12
  13 make_command()
  14 {
  15         if [ -z "$1" ]
  16         then
  17                 echo "cat"
  18         else
  19                 echo "mail -s \"$subject\" $1"
  20         fi
  21 }
  22
  23 if ! mount | grep "on $1 type nfs" > /dev/null
  24 then
  25         subject="WARNING! Network file system ($1) on $(hostname) is not mounted!"
  26
  27         [ -z "$2" ] && echo "${subject}"
  28         CMD=$(make_command "$2")
  29         eval ${CMD} << EOT
  30 This is to inform you that no NFS is mounted at $1.
  31 Please investigate immediately!
  32 EOT
  33 exit 2
  34
  35 elif ! timeout 15 stat "$1" > /dev/null
  36 then
  37         subject="WARNING! Network file system ($1) on $(hostname) is hanging/unreachable!"
  38
  39         [ -z "$2" ] && echo "${subject}"
  40         CMD=$(make_command "$2")
  41         eval ${CMD} << EOT
  42 This is to inform you that network share $1 is hanging/unreachable.
  43
  44 Mount details:
  45
  46 $(mount | grep "$1")
  47
  48 Please investigate immediately!
  49 EOT
  50 exit 3
  51
  52 fi