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Ants AasmaandAlexander Kukushkin
644b741969
Current UI to change cluster configuration is somewhat unfriendly, involving a curl command, knowing the REST API endpoint, knowing the specific syntax to call it with and writing a JSON document. I added two commands in this branch to make this a bit easier, `show-config` and `edit-config` (names are merely placeholders, any opinions on better ones?). * `patronictl show-config clustername` fetches the config from DCS, formats it as YAML and outputs it. * `patronictl edit-config clustername` fetches the config, formats it as YAML, invokes $EDITOR on it, then shows user the diff and after confirmation applies the changed config to DCS, guarding for concurrent modifications. * `patronictl edit-config clustername --set synchronous_mode=true --set postgresql.use_slots=true` will set the specific key-value pairs. There are also some UI capabilities I'm less sure of, but included them here as I already implemented them. * If output is a tty then the diffs are colored. I'm not sure if this feature is cool enough to pull the weight of adding a dependency on cdiff. Or maybe someone knows of another more task focused diff coloring library? * `patronictl edit-config clustername --pg work_mem=100MB` - Shorthand for `--set postgresql.parameters.work_mem=100MB` * `patronictl edit-config clustername --apply changes.yaml` - apply changes from a yaml file. * `patronictl edit-config clustername --replace new-config.yaml` - replace config with new version.