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From "Christian Bickel" <>
Subject Re: I want to subscribe
Date Mon, 26 Jun 2017 06:03:55 GMT
Hi SangHeon,

Currently I'm also working on Contorller-HA. I'll put the mail, that I have written to the
dev list last week about this topic on the bottom of this mail.

But to shortly summarise it up:
- it is already possible to deploy an hot-standby controller.
- the next step will be to share the cache and the state of the controller.
- Some ideas I already have are written down here:

If you have some more ideas, please let me know about them and/or write a comment to the wiki.
I'm looking forward to work with you.


Mail about controller scale-out:

Hi OpenWhisk-developers,

currently we have the problem, that we can only deploy one controller. Reason for this is
some state, that is not shared across the controllers, which would result in a system which
is not stable anymore.

To be able, to deploy more than one controller, I already looked into this topic.
I've created a little document, to keep you on track and present you my ideas:
Maybe you also have some ideas/concerns, that I missed so far. Just leave them as comment.

There is also already a PR, which will address the first items that are described in the document
above. (


June 26, 2017 1:53 AM, "Matt Rutkowski" <> wrote:

> Hi SangHeon,
> You can self subscribe to the list by following the instructions here:
> which has the following instructions:
> To subscribe to the list, send a message to:
> you should get a confirmation almost immediately.
> Kind regards,
> Matt 
> From: SangHeon Lee <>
> To:
> Date: 06/25/2017 06:47 PM
> Subject: I want to subscribe
> Hi, I want to subscribe openwhisk’s mailing list
> I’m interested in making controller HA
> thanks

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