How to add environment variables to naemon check_commands

Preface

When issuing check_commands in OP5 Monitor they are run as the user monitor. However, they are not run in a full login session. As such, they have limited environment variables available to them. Sometimes it's necessary to make environment variables available to the check_commands. This can be done in the following ways.

EL6

It's possible to use the file /etc/sysconfig/naemon to define environment variables as such:

export VARIABLE=value

EL7

The above-mentioned method is not currently working on EL7. Instead, variables can be defined in /etc/systemd/system/monitor.service. In the section [Service], add the following line:

Environment="VARIABLE=value"

After this, reload and restart the monitor service:

systemctl daemon-reload && systemctl restart monitor.service

Note that the above is a workaround waiting for the resolution of bug MON-10843. It's possible that the service file for monitor.service could be overwritten by a yum update. Please consult with Support for information about this.