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opHA supports pollers pushing updates or Primaries pulling updates (or both). If you want a poller to have the ability to push, it needs to have the servers it should push to in it's Servers.nmis file. Conversely if you want Primaries to be able to pull they need to have the pollers they should pull from in their Servers.nmis file. At this point it is good to draw yourself a diagram (if you have not already) to aid you in configuring each Primary and poller.
In addtionaddition: each server (Primary and poller) needs to have a localhost entry in Servers.nmis which tells the server how to log in to itself. NB: it must be 'localhost' in both the key and name portions, 127.0.0.1 will not work!
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By default, an NMIS server operates in standalone mode (which is also poller mode), to have NMIS behave in a Primary fashionPrimary fashion, you will need to modify the configuration, so you can edit the NMIS Configuration item "severserver_master" using your favourite text editor, edit this line and change from "false" to "true".
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There are two options to run opHA, using Cron or a as a post process after a NMIS does a collect. Pushes and pulls can be requested from anywhere, if they are requested from the localhost no authentication is required, if they are requested from elsewhere authentication is required.
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