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What is the difference between Openstack-Heat and puppet/chef?

Hi, I'm studying about cloud automation tools for creating cluster environment (for supercomputing) with openstack

I was thinking of either using puppet or chef, but soon come to realize that Openstack has its own automation tool, Heat. I've googled about the difference between chef/puppet and heat, but nothing really clearly helps me understand the difference...

so my question is.. 1) What's the difference between Heat and puppet/chef? 2) Can heat be used to automate the deployment of an application within an instance? (or instances..) or should puppet/chef be used for it?

What is the difference between Openstack-Heat OpenStack Heat and puppet/chef?Puppet or Chef?

Hi, I'm studying about cloud automation tools for creating cluster environment (for supercomputing) with openstack

I was thinking of either using puppet or chef, but soon come to realize that Openstack has its own automation tool, Heat. I've googled about the difference between chef/puppet and heat, but nothing really clearly helps me understand the difference...

so my question is..

1)
  1. What's the difference between Heat and puppet/chef? 2) puppet/chef?
  2. Can heat be used to automate the deployment of an application within an instance? (or instances..) or should puppet/chef be used for it?