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It is possible that while connecting to memcached server, connect timeout might occur. To overcome this, modify check_memcached.pl to increase the connect timeout from its default value of 0.25 seconds as below:

$memd = new Cache::Memcached { 'servers' => [ $dsn ], 'connect_timeout' => 1 };

Ref: http://search.cpan.org/~dormando/Cache-Memcached-1.30/lib/Cache/Memcached.pm#CONSTRUCTOR

Here is a patch to make it authenticate using Kerberos password as well and not just keytab. I have also hard-coded the path for utils.sh as it was in a different location from where I stored this plugin. So modify utils.sh path according to your environment.

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> # Modified by Rahul Amaram
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. /usr/lib/nagios/plugins/utils.sh
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> -w, --password=PASSWORD Password for the principal
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> -w|--password) shift; password=$1; shift;;
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if [ -z "$kdc" -o -z "$principal" ] || [ -z "$keytab" -a -z "$password" ]; then
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&1`
---
> if [ -n "$password" ]; then
> err=`KRB5_CONFIG=$conf expect -c "log_user 0; spawn kinit -c \"$cc\" \"$principal\"; expect -re \"Password for .*: \"; send \"$password\r\"; expect eof; send_user \"\\$expect_out(buffer)\"; catch wait result; exit [lindex \\$result 3]"`
> else
> err=`KRB5_CONFIG=$conf kinit -c "$cc" -k -t "$keytab" "$principal" 2>&1`
> fi
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echo "CRITICAL Getting Kerberos ticket: `echo $err | sed -r 's/^.*?kinit:\s*//' | head -n 1`"

Great plugin. However in check_smtp_send, I noticed a small bug because of which the date timestamp was not being set properly. Here is the fix for it - In check_smtp_send on line 349, change "gmtime" to "localtime". This will set the correct timestamp in the sent mails.