[chef] Re: How to deploy to nodes synchronously ?

[Faiz Kazi < >]

If you prefer to just have chef-clients running
in daemon mode all the time, then this may be
a good way to ensure that your core services do
not get restarted all at once:

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



On Mon, 30 Jul 2012 16:20:37 -0700
Irvin Fan 
<
 >
 wrote:

> I'm new to chef and still trying to understand how it works. I
> searched the FAQ and couldn't find the answer to this. Please forgive
> me if the question has been answered before.
> 
> Let's say I have 100 nodes running chef-client daemon. If I update the
> config for those nodes in chef-server my understanding is that all
> those chef-clients will detect the changes for its own node and go
> ahead to do whatever the recipes say to do. How can I control the
> process synchronously. I don't want all my 100 nodes updating at the
> same time because the update process may require restarting Apache. I
> know one way to do it is to run the chef-client in non-daemon mode.
> e.g. run "knife ssh <node> chef-client" on nodes one by one. I'm
> wondering is it possible to still run the chef-client in daemon mode
> but control the process on server side so that the update happens one
> node at a time? Maybe I can update the setting one node at a time.
> But how can I know the chef-client on a particular node is done so
> that I can move to update the setting for next node?
> 
> Thanks
> 
> Irvin