\|/ (__)
`\------(oo)
|| (__)
||w--|| \|/
\|/
make sure the emails are reaching out to you
mailq tail -n0 -F /var/log/maillog & tail -n0 -F /var/log/mail.* & date | mail -s `uname -n` root
make sure curl is configured properly against a CA store
curl -I https://nethence.com/
grab the script from here, uncomment/tune whatever suits your infrastructures and define a cron job against it e.g. every hour
crontab -e 45 * * * * /root/alive.ksh 2>&1
make sure sparse file work
cd /PATH/TO/GFS2/MOUNT/POINT/ dd if=/dev/zero of=dummy.ext4 bs=1GB count=0 seek=1 mkfs.ext4 dummy.ext4 cp --sparse=always dummy.ext4 dummy-clone.ext4 md5sum dummy.ext4 dummy-clone.ext4 rm -f dummy*
tested on NetBSD, assuming you got ClusterIt ready in da place
I am using Bash instead of KSH because the latter is not always installed on the target linux hosts.
I am just reporting errors (e.g. disk usage above 90%) so it gets send by email from a crontab.
Prepare the scripts,
mkdir ~/report/ cd ~/report/ wget http://pbraun.nethence.com/scripts/net/diskusage.bash wget http://pbraun.nethence.com/scripts/net/memoryusage.bash wget http://pbraun.nethence.com/scripts/net/omreport.bash chmod +x diskusage.bash chmod +x memoryusage.bash chmod +x omreport.bash
test them,
cd ~/ dsh -e -g linux -s report/diskusage.bash dsh -e -g linux -s report/memoryusage.bash dsh -e -g poweredge -s report/omreport.bash
Make sure you’ve setup the root alias in /etc/mail/aliases.
Eventually setup a smarthost (relayhost =) into /etc/postfix/main.cf
Then finally enable the crontab e.g.,
crontab -e */5 * * * * /usr/pkg/bin/dsh -e -g linux -s /root/report/diskusage.bash 0 * * * * /usr/pkg/bin/dsh -e -g poweredge -s /root/report/omreport.bash
on NetBSD, also change the daily/weekly/monthly crontabs so you won’t get bugged (no need to setup a filter which would make the alerts useless!),
15 3 * * * /bin/sh /etc/daily >> /var/log/daily.out 2>&1 30 4 * * 6 /bin/sh /etc/weekly >> /var/log/weekly.out 2>&1 30 5 1 * * /bin/sh /etc/monthly >> /var/log/monthly.out 2>&1
Note. full path for script to be executed is needed into the crontab, while on command line you can use -s report/scriptname where ever you are (so it’s not even relative to your current working directory but to the homedir), strange.
To enable the Web UI, launch the NetBSD built-in web server (Bozohttpd),
cd /etc/ cp inetd.conf inetd.conf.dist vi inetd.conf http stream tcp nowait:600 _httpd /usr/libexec/httpd httpd -X /var/www http stream tcp6 nowait:600 _httpd /usr/libexec/httpd httpd -X /var/www /etc/rc.d/inetd reload
Note. -X to enable directory listing