My Impressions of salt-ssh

Why aren't you Ansible?

I’ve done a search and there seem to be a large number of issues related to salt-ssh usability with non-root users. I’d like to understand more about the perceived use case from Salt’s perspective and give some feedback.

Perceived use case

salt-ssh seems to be an answer to Ansible and Fabric where the ssh transport from a single laptop is useful for a system administrator to maintain a smaller set of infrastructure. My use case would be running from a virtualenv after pip installing salt-ssh. I would typically create a folder for a set of infrastructure and states. If I was executing the command from this directory I expect salt-ssh to look in this working directory for things like rosters and configuration files. The next place would be a folder ~/.salt-ssh folder in my home directory. I would expect cache directories to be automatically created in that location. The final location would be the system wide settings in /etc/salt.

Ideal workflow

The salt-ssh command should just work given the following actions on my part: 1. Create a virtualenv and pip install salt-ssh 1. Activate the virtualenv 1. Make and change into a working directory. 1. Create a roster file with the hosts I want to manage. 1. A command like salt-ssh "*" test.ping should work without any further configurations assuming ssh keys are in place. (which brings me to my next point.)

SSH Configuration

Another expectation on my part was that salt-ssh would make use of my existing ~/.ssh/config configuration to connect to the various hosts in my roster. That includes pre-existing ssh keys, SSH proxy through a configured bastion, usernames, ports, and other settings allowed in this configuration file.

The auto creation of an ssh key is admirable for someone that hasn’t used keys before but re-keying all my servers would be annoying. salt-ssh should try to detect existing keys in their default locations and only offer to generate one if it can’t find a key.

Saltfile

This line from the documentation concerns me as well:

The option keys specified must match the destination attributes for the options specified in the parser salt.utils.parsers.SaltSSHOptionParser.

At the very least the documentation should link or document the config file parameters so we don’t have to dig through the code to find them.

The options specified should either: 1. Be fully documented in the code, 1. Match the command line parameters, or 1. Document the alternative names in the help text of salt-ssh -h.

Ultimately…

the goal is to make it as easy as possible for me to go from 0 to salt-ssh with the smallest amount of pain possible. A confusing use case, complicated installation and configuration, ignoring existing SSH configurations, and undocumented options in Saltfile make this unnecessarily complicated.

Another Use Case

If the goal of salt-ssh is to simply be an alternative transport for the existing use case of the salt command then my points are invalid. If we want to give users an easier introduction into SaltStack and lower the barrier to entry I think these changes are valid and necessary.

 
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