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Now about your `tricorder`, by looking at the readme, I gather it just allows one to run the same command over multiple hosts (filtered by name or tag), but nothing beyond that? How could one run for example a pipeline of tools on the remote hosts? (I assume `bash -c 'tool-1 | tool-2'`, but with careful escaping?)
Perhaps a first step towards actually being an "Ansible replacement" would be to bring back in some "scripting" ability. For example instead of giving each command as arguments, there could be a "library of scripts", and the user can choose one of those to run on each remote host. Then those scripts could be written in whatever language the user chooses (`bash`, Python, Ruby, etc.)
Also, with regard to the "library of scripts", one thing that Ansible got right is the possibility to put multiple different tasks in the same file, thus one doesn't need 20 files for 20 small tasks, but instead these can be put inside the same YAML file.
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For example this is how I did it in my own "Ansible replacement", <https://github.com/volution/z-run>, like for example, one can write something like these snippets: <https://github.com/volution/z-run/blob/development/examples/...> (see `ssh / launch / simple` that runs locally which just calls `z-run ssh "${_target}" ':: ssh / remote / main' "${@}"`, which is in itself a non trivial `bash` script, one that will run remotely.)
In the end, what I think we need, is a tool to easily run "scripts" on a remote system, but make it as easy to use as it would be on the local machine. (Sort of like the RPC but across SSH and for scripts.)