First of all we need to make friend Linux alert# server & Netapp filer…
NetApp 7-mode SSH key passwordless auth
Generate key@Linux host
[root@alert ~]# ssh-keygen -t rsa -b 2048 -f gus-key
[root@alert ~]# cat ./gus-key.pub
sssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA1QobRNaPRCx2u5Cpd8ZEn
Put gus-key.pub to the NetApp ssh conf:
[root@alert ~]# ssh systemB
#####
> priv set advanced
*> useradmin diaguser unlock
*> useradmin diaguser password
##### GO to NetApp system shell
*> systemshell
##use diag to login
login: diag
passwd:
% mkdir -p /mroot/etc/sshd/root/.ssh
% vi /mroot/etc/sshd/root/.ssh/authorized_keys
sssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA1QobRNaPRCx2u5Cpd8ZEn
% chown -R root:wheel /mroot/etc/sshd/root
% chmod -R 0600 /mroot/etc/sshd/root
% exit
####Lock acc
*> useradmin diaguser lock
####Leave priv mode
*> priv set admin
> exit
############Now we are able to run remote ssh command….
Here is the script to check LAG time summary in minutes and if lag time is more that 20 min it will send ALERT message to the recipients…
it runs every 1 min thru the crontab…
My NetApp has 4 volumes in replication which runs every 3 min…0-59/3 :)Each replication takes less that 1 min, then summary shouldn’t be more that 4… :)
[root@alert ~]# cat /root/systemB.sh
#!/bin/bash
#Target NAS
nas=”systemB”
#Target Volume
volume=”systemB”
#Define acceptable threshold summary in MIN
threshold=”20″
#Email to list.
mail_user_list=”[email protected]”
#Email CC list
mail_cc_list=”[email protected]”
#Command to get snapmirror lag time summary
mirror_min_sum=`ssh $nas snapmirror status | grep $volume | awk ‘{print $4}’ | awk -F ‘:’ ‘{ sum+=$2} END {print sum}’`
#Simple mail content.
message=’Perform snapmirror status check’
if [ $mirror_min_sum -gt $threshold ]
then
echo $message | mail -s “[Alert]snapmirror lag time at $nas greater than $threshold minutes! ” -c $mail_cc_list $mail_user_list — -r “[email protected]”
fi
[root@alert ~]# contab -e
*/1 * * * * /root/systemB.sh #EVERY MIN
*/1 * * * * /root/systemA.sh #EVERY MIN
###JUST A LITTLE COMMAND :)
cat ./ss | grep system | awk ‘{print $4}’ | awk -F ‘:’ ‘{ sum+=$2} END {print sum}’
###
systemB> snapmirror status
Snapmirror is on.
Source Destination State Lag Status
systemC:vol0 systemB:vol3 Snapmirrored 00:01:53 Idle with restart checkpoint (23 MB done)
systemC:vol4 systemB:vol5 Snapmirrored 00:02:58 Transferring (36 MB done)
systemA:/vol/vol1/qt5 systemB:/vol/vol4/qt5 Quiesced 00:01:12 Idle
systemC:/vol/vol2/qt1 systemB:/vol/vol1/qt2 Snapmirrored 00:02:33 Quiescing
# date
Mon Dec 21 19:25:47 AZT 2015
