[chef-dev] Re: Re: need more information on Chef

Chronological Thread 
  • From: Joseph Anthony Pasquale Holsten < >
  • To: Ranjib Dey < >
  • Cc: Ilisia Felane < >, " " < >
  • Subject: [chef-dev] Re: Re: need more information on Chef
  • Date: Tue, 29 Apr 2014 10:06:46 -0700

I’ve been wondering about juju. Do you know of any other competitors in the space, especially any that are more consistent with chef’s domain model?

On Apr 29, 2014, at 10:02 AM, Ranjib Dey < "> > wrote:

what exactly you are trying to do? if we know the problem domain, we may be able to give more focused comparison, but in general:

1) juju 's primary domain model is a service, not a server. Chef on the other hand is a configuration management tool, where a node or physical/virtual server is primary domain model. chef dont have service as a first class domain model. 
2) juju is also an orchestration engine. i.e you'll be able to specify what cross server order of operations. this is not possible with chef. chef allows you to search for other servers but the order of chef-run (and the command invocations inside them) is not enforced or provided by chef. you do it externally
3) juju is written in python (afaik) and people extend juju using charms, which is bunch of yaml (config etc) and scripts (mostly bash, but can be python or anything else as well), while chef uses recipes/cookbooks as extension mechanism. chef recipe/cookbooks are pure ruby. Its a matter of in house expertise and programming taste which one you would prefer (i'll not prefer bash for anything that involves lot of coding).
4) you can use juju to orchestrate chef-runs. that way you can get simplify charms (attaining idempotency at lower level, keeping the ability to reuse chef artifacts outside juju, where orchestration might not be necessary, e.g spinning up developer boxes) , while leveraging juju's orchestration capabilities, fancy UI to do drag and drop way of building environment etc.

there are lot other differences (like juju is mostly used with ubuntu, while chef is popular across distributions/platforms etc, difference in communities, difference in available extensions [cookbooks.opscode.com vs jujucharms.com] their quality and volume etc), but these were main ones i can think of


On Tue, Apr 29, 2014 at 4:57 AM, Ilisia Felane < " target="_blank"> > wrote:
I started with Chef, and I am looking for further information

What are the differences between Chef and Juju ? Can I use the recipes created with Chef on Juju, but what is the interest ?

Best regards,


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