Itamar Heim has posted comments on this change.

Change subject: core: adding engine Maintenance mode.(#868639)
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Patch Set 3:

was talking to ayal about this patch.
we may want to modes for it:
1. "prepare" - will block only commands creating async tasks.
this will allow admin to move engine to "prepare" mode a few hours before the 
planned maint schedule to reduce chance of async tasks lingering in the system.

2. "maint" - will block any action, so compensation can occur without incoming 
commands.
(although, actually, we may want to allow fencing nodes and SPM election to 
happen even in this mode to allow cleanup of system).

so, maybe a 3rd mode of "adminonly", which will allow only admin@internal to 
login and perform actions in the system (somewhat like moving a db to single 
user mode)

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Gerrit-MessageType: comment
Gerrit-Change-Id: Idd86f9f9008a447e160edc913ee8a6cd70912dcb
Gerrit-PatchSet: 3
Gerrit-Project: ovirt-engine
Gerrit-Branch: master
Gerrit-Owner: Eli Mesika <emes...@redhat.com>
Gerrit-Reviewer: Eli Mesika <emes...@redhat.com>
Gerrit-Reviewer: Itamar Heim <ih...@redhat.com>
Gerrit-Reviewer: Michael Kublin <mkub...@redhat.com>
Gerrit-Reviewer: Yair Zaslavsky <yzasl...@redhat.com>
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