|Version being discussed||Ansible||Puppet 3.7.4||CFEngine 2||Chef||Comments|
|Agent||agentless, use ssh||agent/daemon||agent run from cronjob, then exit. config read from shared file system. no push mechanism||Chef||Ansible is different from the pack. Being agentless maybe reason why loved by HPC admins|
|Guiding principle||Idempotent (but not guaranteed)||Define what, not how||One engine to rule them all||Got Knife?||Comments|
|"Feel"||Did it run? Oh we can run it again, just to be sure :)||Facts based. Not alternative truth!||giant state machine, hard to troubleshoot what state is in from a spagetti combination of classes and conditions||Getting stabbed :)||I only like to eat, don't like to cook|
|Adopters||HPC?||DevOps, Ruby lovers?||SysAdmins|
|Config||YAML, Jinja template||YAML,||CFEngine's own syntax|
|Module/code sharing||Playbook, written in python, perl, bash, etc. They are copied to nodes for execution.||Ruby||CFEngine 2 felt pretty monolithic, don't remeber seeing plugin modules. CFEngine 3 may have such support.||Knife, Recipe|
|Cloud support||AWS, OpenStack, many others||Yes||No special provision in CFEngine 2||Yes||YMMV? :)|
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