systemd service should match configured command_file location

[sspans]

Cookbook version

Latest

Platform Details

CentOS 7

Scenario:

The nagios command_file is partially managed via the packaged systemd service

> grep cmd  /usr/lib/systemd/system/nagios.service
ExecStopPost=/usr/bin/rm -f /var/spool/nagios/cmd/nagios.cmd

When a different command_file location is specified in the cookbook this management will break. Resulting in a broken command_file after a nagios restart.

Steps to Reproduce:

echo '{ "nagios": { "conf": { "command_file": "/var/log/nagios/rw/nagios.cmd" } } }' | sudo chef-client -j /dev/stdin
systemctl restart nagios
/usr/lib64/nagios/plugins/eventhandlers/nagios_command STOP_EXECUTING_SVC_CHECKS

Expected Result:

A command arriving at the running nagios server

Actual Result:

Write blocks, because the command_file is broken

Possible solution

directory '/etc/systemd/system/nagios.service.d/'

file '/etc/systemd/system/nagios.service.d/command_file.conf' do
  content "[Service]\nExecStopPost=/usr/bin/rm -f #{node['nagios']['conf']['command_file']}"
  mode 0644
  notifies :run, 'execute[reload_systemd_nagios]', :immediately
end

execute 'reload_systemd_nagios' do
  command <<-EOF
    systemctl daemon-reload
  EOF
  action :nothing
end

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