• xmlstarlet
• fping
• qstat

I just temporarily loaded standard epel7, installed those 3 pkgs, then removed it again, and re-played my playbook.  Some of those pre-req's are because of my local customizations, xmlstarlet certainly...

*Disclaimer*   our playbook is soup-to-nuts with a lot of customizations, and we're even towing some legacy config from Nagios v3.  This results in a few bumps.

Playbook *almost* went to completion, indicated Nagios server wouldn't start at the end, with errors.

• error says,
  /etc/nagios/nagios.cfg -- Line 457 (Check result path '/var/log/nagios/spool/checkresults' is not a valid directory ...)
  
• OK, comparing that with the canonical config, which suggests the correct path might be: /var/spool/nagios/checkresults.  Oh hey, that exists.  Update my copy of nagios.cfg to use the canonical path, restart nagios service.
  
• Nope, still won't start.  SELinux?
  
• my system was enforcing; I set it to permissive
• yup, now the nagios service starts.  SELinux confirmed as problem.
  
• What's set?
  [root@jupiter nagios]# ls -ldZ /var/spool/nagios/checkresults
  drwxr-x---. nagios nagios system_u:object_r:nagios_spool_t:s0 /var/spool/nagios/checkresults
  
• Compare with another system where I have it working - a Nagios server installed from EPEL7 @ v4.0.8:
  [root@ayr nagios]# ls -dZ /var/log/nagios/spool/checkresults # but, note customized path
  drwxr-x---. nagios nagios system_u:object_r:nagios_log_t:s0 /var/log/nagios/spool/checkresults
  
• (but, that system is also set selinux-permissive)
• Back on my updated system, try the basics:
  ausearch -c 'nagios' --raw | audit2allow -M my-nagios
  semodule -i my-nagios.pp
• What did that do?
  [root@jupiter ~]# ls -ldZ /var/spool/nagios/checkresults
  drwxr-x---. nagios nagios system_u:object_r:nagios_log_t:s0 /var/spool/nagios/checkresults
  
• Hey, nagios starts now!

So, I was able to slot this new version into my playbook with a minimum of fuss. It's currently monitoring 21 local Dev servers, 261 services.  I haven't see any issues.

[root@jupiter ~]# rpm -q nagios
nagios-4.2.4-1.el7.centos.x86_64

[root@jupiter ~]# rpm -qa | grep nagios-plugins | grep -v ualib | grep -v percona
nagios-plugins-sensors-2.1.4-1.el7.centos.x86_64
nagios-plugins-mailq-2.1.4-1.el7.centos.x86_64
nagios-plugins-dhcp-2.1.4-1.el7.centos.x86_64
nagios-plugins-nagios-2.1.4-1.el7.centos.x86_64
nagios-plugins-fping-2.1.4-1.el7.centos.x86_64
nagios-plugins-oracle-2.1.4-1.el7.centos.x86_64
nagios-plugins-users-2.1.4-1.el7.centos.x86_64
nagios-plugins-swap-2.1.4-1.el7.centos.x86_64
nagios-plugins-time-2.1.4-1.el7.centos.x86_64
nagios-plugins-mrtg-2.1.4-1.el7.centos.x86_64
nagios-plugins-dummy-2.1.4-1.el7.centos.x86_64
nagios-plugins-all-2.1.4-1.el7.centos.x86_64
nagios-plugins-uptime-2.1.4-1.el7.centos.x86_64
nagios-plugins-2.1.4-1.el7.centos.x86_64
nagios-plugins-breeze-2.1.4-1.el7.centos.x86_64
nagios-plugins-real-2.1.4-1.el7.centos.x86_64
nagios-plugins-tcp-2.1.4-1.el7.centos.x86_64
nagios-plugins-mysql-2.1.4-1.el7.centos.x86_64
nagios-plugins-smtp-2.1.4-1.el7.centos.x86_64
nagios-plugins-hpjd-2.1.4-1.el7.centos.x86_64
nagios-plugins-ntp-perl-2.1.4-1.el7.centos.x86_64
nagios-plugins-ssh-2.1.4-1.el7.centos.x86_64
nagios-plugins-ups-2.1.4-1.el7.centos.x86_64
nagios-plugins-game-2.1.4-1.el7.centos.x86_64
nagios-plugins-nrpe-3.0.1-1.el7.centos.x86_64
nagios-plugins-perl-2.1.4-1.el7.centos.x86_64
nagios-plugins-wave-2.1.4-1.el7.centos.x86_64
nagios-plugins-file_age-2.1.4-1.el7.centos.x86_64
nagios-plugins-http-2.1.4-1.el7.centos.x86_64
nagios-plugins-overcr-2.1.4-1.el7.centos.x86_64
nagios-plugins-ldap-2.1.4-1.el7.centos.x86_64
nagios-plugins-nwstat-2.1.4-1.el7.centos.x86_64
nagios-plugins-nt-2.1.4-1.el7.centos.x86_64
nagios-plugins-procs-2.1.4-1.el7.centos.x86_64
nagios-plugins-icmp-2.1.4-1.el7.centos.x86_64
nagios-plugins-by_ssh-2.1.4-1.el7.centos.x86_64
nagios-plugins-pgsql-2.1.4-1.el7.centos.x86_64
nagios-plugins-snmp-2.1.4-1.el7.centos.x86_64
nagios-plugins-dns-2.1.4-1.el7.centos.x86_64
nagios-plugins-disk_smb-2.1.4-1.el7.centos.x86_64
nagios-plugins-ircd-2.1.4-1.el7.centos.x86_64
nagios-plugins-flexlm-2.1.4-1.el7.centos.x86_64
nagios-plugins-mrtgtraf-2.1.4-1.el7.centos.x86_64
nagios-plugins-log-2.1.4-1.el7.centos.x86_64
nagios-plugins-load-2.1.4-1.el7.centos.x86_64
nagios-plugins-cluster-2.1.4-1.el7.centos.x86_64
nagios-plugins-disk-2.1.4-1.el7.centos.x86_64
nagios-plugins-ping-2.1.4-1.el7.centos.x86_64
nagios-plugins-ntp-2.1.4-1.el7.centos.x86_64
nagios-plugins-ide_smart-2.1.4-1.el7.centos.x86_64
nagios-plugins-rpc-2.1.4-1.el7.centos.x86_64
nagios-plugins-dig-2.1.4-1.el7.centos.x86_64

eg: