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Description of problem:
Looking at the source code (https://github.com/ClusterLabs/fence-agents/blob/master/fence/agents/rhevm/fence_rhevm.py ) , it appears it goes to /api and not /engine/api endpoint, so it'll fail against RHV 4.0.x and above.

*** This bug has been marked as a duplicate of bug 1402862 ***

(In reply to Marek Grac from comment #3)
> 
> *** This bug has been marked as a duplicate of bug 1402862 ***

Marek - this bug is a half of a line fix (just change the URL to /engine/api instead of /api )

The other bug require a bit more work.

@Yaniv:

Will /engine/api works will all older versions?

To be accurate, it is /ovirt-engine/api

As far as I remember it works in 3.6 and above (maybe also 3.5).
Juan - can you give a more accurate answer about it?

The recommended URL is /ovirt-engine/api since oVirt/RHV 3.5. Support for just /api was removed in oVirt/RHV 4.0.

Note also that the version of the fence agent included currently in RHEL already includes this patch (which hasn't been merged upstream):

  Explicitly use version 3 of the oVirt API
  https://github.com/ClusterLabs/fence-agents/pull/71

See bug 1287059 for details.

That means that it will already use /ovirt-engine/api by default, unless explicitly given the '--api-path' option with a different value.

Re-opening it, based on comment 7 - /ovirt-engine/api will work with v3.5 and above, so I suggest making this easy fix now, rather than the small rewrite that is needed to happen to v4 API.

This is fixed in bz#1422499.

*** This bug has been marked as a duplicate of bug 1422499 ***