Apr 12

Nagios on Linux for SPARC

I recently experimented a little with Linux for SPARC(more here https://oss.oracle.com/projects/linux-sparc/) and found it to be surprisingly stable. One of the environments I support is a pure OVM for SPARC environment and no luxury of Linux. So I am running some open source tools like Nagios, HAproxy etc on Solaris. Nagios has worked ok but is painful to compile. There are also some bugs that cause high utilization.

I tried a Linux for SPARC instance and since they are pretty much like RedHat/Oracle/CentOS it means a fair bit of packages already exist. Nagios does not exist so I compiled it. Suffice to say installing dependencies from YUM and compiling was a breeze compared to Solaris.

You can pretty much follow this doc to the letter:
https://assets.nagios.com/downloads/nagioscore/docs/Installing_Nagios_Core_From_Source.pdf

Things to note.
1. By default the firewall does not allow inbound http.

2. If you have permission issues in the web frontend or something like Internal server error you can disable(quick test) and then configure selinux for nagios scripts.

# setenforce 0
# chcon -R -t httpd_sys_content_t /usr/local/nagios

3. Redo plugins with openssl for https checks. I wanted to do https checks.

# yum install openssl-devel
# pwd
/usr/src/nagios/nagios-plugins-2.1.1

# ./configure --with-openssl --with-nagios-user=nagios --with-nagios-group=nagios
[..]
                    --with-openssl: yes
# make
# make install

# /usr/local/nagios/libexec/check_http -H 10.2.10.33 -S -p 215 
HTTP OK: HTTP/1.1 200 OK - 2113 bytes in 0.017 second response time |time=0.016925s;;;0.000000 size=2113B;;;0

I made a https command as follow.

command.cfg
# 'check_https' command definition
define command{
        command_name    check_https
        command_line    $USER1$/check_http -H $HOSTADDRESS$ -S -p $ARG1$
        }

And referenced as follow.

storage.cfg
define service{
        use                             remote-service         ; Name of service template to use
        host_name                       zfssa1
        service_description             HTTPS
        check_command                   check_https!215
        notifications_enabled           0
        }

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