AWS OpsWorks is a configuration management service that provides managed instances of Chef and Puppet.
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Salt
Score 7.8 out of 10
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Built on Python, Salt is an event-driven automation tool and framework to deploy, configure, and manage complex IT systems. Salt is used to automate common infrastructure administration tasks and ensure that all the components of infrastructure are operating in a consistent desired state.
Where you already have some Chef recipes to build your application boxes and are happy to run directly on VMs, OpsWorks really shines. It won't do anything too complex for you, so it only really works well for simple stacks (load balancers, application layers, database layers). If you want to do more complex infrastructure, Cloudformation or Terraform are probably worth looking at.
SaltStack is a very well architected toolset and framework for reliably managing distributed systems' complexity at varied scale. If the diversity of kind or number of assets is low, or the dependencies are bounded and simple, it might be overkill. Realization that you need SaltStack might come in the form of other tools, scripts, or jobs whose code has become difficult, unreliable, or unmaintainable. Rather than a native from-scratch SaltStack design, be aware that SaltStack can be added on to tools like Docker or Chef and optionally factor those tools out or other tools into the mix.
Targeting is easy and yet extremely granular - I can target machines by name, role, operating system, init system, distro, regex, or any combination of the above.
Abstraction of OS, package manager and package details is far advanced beyond any other CRM I have seen. The ability to set one configuration for a package across multiple distros, and have it apply correctly no matter the distrospecific naming convention or package installation procedure, is amazing.
Abstraction of environments is similarly valuable - I can set a firewall rule to allow ssh from "management", and have that be defined as a specific IP range per dev, test, and prod.
Getting up and running with OpsWorks is a very technical and potentially time-consuming process. You need to know the ins and outs of Chef/Puppet if you really want to get into it and there isn't a convenient way to test out the environment locally so debugging can be time-consuming.
To take advantage of some of the newer AWS instance types you need to be running on a VPC, which again is a pain if you don't have a DevOps team.
The error logs and monitoring metrics in OpsWorks are pretty basic and haven't changed much over the years.
Unless you pay for a pricey support package getting support on OpsWorks will be pretty slow. Documentation is also relatively limited and sometimes hard to follow when compared to competitors. Generally, we've been able to get the answers we need from OpsWorks support when we run into problems but don't expect rapid responses.
We haven't had to spend a lot of time talking to support, and we've only had one issue, which, when dealing with other vendors is actually not that bad of an experience.
OpsWorks isn't really a direct competitor to Terraform/Cloudformation, but it does allow you to do some of the more simple things on offer quite quickly and effectively. Opsworks was used for this reason, along with existing internal knowledge of Chef. Along with some of the other services on offer from AWS, it is good to use as a stepping stone along the way when building your systems - or perhaps it would be entirely suitable for a fairly simple project.
We moved to SaltStack from Puppet about 3 years ago. Puppet just has too much of a learning curve and we inherited it from an old IT regime. We wanted something we could start fresh with. Our team has never looked back. SaltStack is so much easier for us to use and maintain.
We manage two complex highly available self-healing (all infrastructure and systems) environments using SaltStack. Only one person is needed to run SaltStack. That is a HUGE return on investment.
Building tooling on top of SaltStack has allowed us to share administrative abilities by role - e.g. employee X can deploy software Y. No need to call a sysadmin and etc.
Recovery from problems, or time to stand-up new systems is now counted in minutes (usually under eight) rather than hours. This is a strategic advantage for rolling out new services.
