I recently had all sorts of nightmares trying to configure cacti to talk to haproxy, via an snmp perl-script. It turns out, the problem wasn’t the normal chmod fun, wrong paths, or anything like that. Instead it was a feature of some distros of Linux known as SELinux (Security Enhanced Linux).
The most confusing part, was that all the errors I was getting, were directing me at commands, and configs, that I’d already checked.
snmpbulkwalk -c public -v2c 127.0.0.1 18.104.22.168.4.1.29385 # SNMPv2-SMI::enterprises.29385 = No Such Object available on this agent at this OID perl /etc/snmp/haproxy.pl # Warning: no access control information configured. # It's unlikely this agent can serve any useful purpose in this state. # Run "snmpconf -g basic_setup" to help you configure the Haproxy.conf file for this agent.
Eventually, after 8 hours of scouring the interwebs, I sent an email off to the developer asking for help. Of course, I managed to discover the problem less than an hour after sending said email.
Regardless, at the end of the day, the following was the magic bullet I used to fix my problem:
setenforce Permissive rm /var/log/audit/audit.log service auditd restart [yourCommand] cat /var/log/audit/audit.log | audit2allow -M [filename] semodule -i [filename].pp setenforce Enforcing