[chef] Re: Re: Re: Re: Re: Simultaneous software upgrade on multiple nodes

[KC Braunschweig < >]

I haven't tried it myself, but saw this a while back and it looked promising:

https://github.com/websterclay/chef-dominodes

Basically does rolling restarts using a databag to implement locking.

KC

On Thu, Nov 10, 2011 at 4:16 PM, Ian Meyer 
<
 >
 wrote:
> I wrote a knife plugin called "batch" (gem install knife-batch) that is
> basically knife ssh, with the ability to specify how many servers to operate
> on at once with a sleep of however long you want in between these batches.
> knife batch "role:foo" "command" -B 10 -W 10 (run command on 10 servers at
> once, with a wait of 10 seconds per batch)
> It's pretty handy in cases where the -C option to knife ssh won't fit your
> needs.
> - Ian
>
> On Mon, Oct 24, 2011 at 12:51 AM, Ranjib Dey 
> <
 >
> wrote:
>>
>> I'll prefer knife ssh and pass  -C 1 (or 5 or whatever block side i need)
>>
>>
>> On Sun, Oct 23, 2011 at 1:52 AM, Rob Guttman 
>> <
 >
>>  wrote:
>>>
>>> If you use aws ec2 and Trac, I wrote a Trac plugin that does the
>>> multi-node serial orchestration for push-button deployments:
>>>   http://trac-hacks.org/wiki/CloudPlugin
>>> It's really just a thin webui wrapper to pychef and boto.
>>> - Rob
>>>
>>> On Oct 22, 2011, at 9:55 AM, Brad Knowles wrote:
>>>
>>> On Oct 22, 2011, at 3:10 AM, Anton Koldaev wrote:
>>>
>>> Let's imagine we have 50 servers with and a distributed web application
>>> and we need to upgrade software on all of them. New software requires
>>> downtime while upgrade.
>>>
>>> If upgrade is performed simultaneously on all servers the application
>>> will be totally unavailable for this time. How to avoid it?
>>>
>>> I don't have personal experience with it, but other Chef experts I've
>>> heard have talked about using "rundeck" to handle the orchestration of
>>> things like this.  I would be very interested to hear what your thoughts
>>> would be on this software.
>>>
>>> --
>>> Brad Knowles 
>>> <
 >
>>> SAGE Level IV, Chef Level 0.0.1
>>>
>>>
>>
>
>