A fake or mock metakv server for dev/testing purposes.

Failover promotes replicas to primary for the remaining nodes.

MainCfg connects to a Cfg provider as a server peer (e.g., as a cbgt.Manager).

MainCfgClient helper function connects to a Cfg provider as a client (not as a known cbgt.Manager server or peer).

MainCfgEx connects to a Cfg provider as a server peer (e.g., as a cbgt.Manager), with more options.

MainUUID is a helper function for cmd-line tool developers, that reuses a previous "baseName.uuid" file from the dataDir if it exists, or generates a brand new UUID (and persists it).

ParseOptions parses an options string and environment variable.

ParseOptionsBool parses the options "name-suffix" and then "name" as boolean (strconv.ParseBool), otherwise returns defaultVal.

PlannerSteps helps command-line tools implement the planner steps: * "unregister" - unregisters nodesRemove from the cfg.

The user may have informed the cmd about application specific index types, which we need to register (albeit with fake, "error-only" implementations) because the cbgt's planner (cbgt.CalcPlan()) has safety checks which skips any unknown, unregistered index types.