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[Openstack] HA Compute & Instance Evacuation


Hi Torin,

Presently, masakari-monitors is completely broken. Extremely sorry for the inconvenience.

I think this is what is needed to make it work.
Install openstacksdk version 0.13.0.

Apply  patch: https://review.openstack.org/#/c/546492/

In this patch ,we need to bump openstacksdk version from 0.11.2 to 0.13.0.
We will merge above patch soon.

Regards,
Tushar Patil


________________________________________
From: Torin Woltjer <torin.woltjer at granddial.com>
Sent: Thursday, May 10, 2018 11:08:58 PM
To: Patil, Tushar
Cc: jpetrini at coredial.com; openstack at lists.openstack.org
Subject: Re: [Openstack] HA Compute & Instance Evacuation

Hi Tushar,

I followed the documentation to set up the masakari monitors, after I
installed the masakari API. None of the monitor services seem to work. I keep
getting an error: "AttributeError: 'module' object has no attribute 'URI'"
Here is the full output: http://paste.openstack.org/show/720761/
Are you aware of what causes the issue? Can you provide any example configs
for a working masakari setup?


On Sunday, May 6, 2018 10:41:48 PM EDT Patil, Tushar wrote:
> Hi Torin,
>
> Masakari supports 4 different types of recovery methods at the time of
> creation of failover_segment.
>
> 1. auto: It will let nova decide on which compute host the instances should
> be evacuated.
>
> 2. reserved_host:  You will first need to add reserved hosts to the failover
> segments. Masakari engine will select the first available reserved host
> from the failover segment, enable compute service in nova and then use that
> reserved host to evacuate the instances from the failed compute host.
>
> 3. auto_priority: it will first try to evacuate instances using 'auto'
> recovery method, if it's fails then it attempts to evacuate using
> "reserved_host" recovery method.
>
> 4. rh_priority: It's opposite of above "auto_priority" recovery method. it
> will first try to evacuate instances using 'reserved_host' recovery method,
> if it's fails then it attempts to evacuate using "auto" recovery method.
>
> In your case you will need to use "auto" recovery method.
>
> Please refer to the below documentation links for more details.
>
> Masakari system architecture:
> https://docs.openstack.org/masakari/latest/
>
> Masakari api-ref:
> https://developer.openstack.org/api-ref/instance-ha/
>
> To install masakari-monitors with pacemaker/corosync:
> https://review.openstack.org/#/c/489095/6/doc/source/install_and_configure_d
> ebian.rst
>
> Other ways to reach us: Masakari weekly meeting on #openstack-meeting IRC
> channel on every Tuesday at 0400 UTC or else you can post your queries on
> #openstack-masakari IRC channel.
>
> Regards,
> Tushar




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