Before the drain CLI would block until the node was marked as completing
drain operations. While technically correct, it could lead operators (or
more likely: scripts) to shutdown drained nodes before all of its
allocations had *actually* terminated.
This change makes the CLI block until all allocations have terminated
(unless ignoring system jobs).
Also delay "node complete" after the node has been marked complete to
capture a few more alloc events. There are other ways to implement this
that could trade off correctness for responsiveness as technically a
node is considered drained when all of its allocs have been marked to
stop and not when they've actually stopped (which may not happen for a
long time).
This PR allows marking a node as eligible for scheduling while toggling
drain. By default the `nomad node drain -disable` commmand will mark it
as eligible but the drainer will maintain in-eligibility.
This PR moves creating the API client into the returned predict
function. The creation of the client causes a lookup of all the system
certificates and doing that for each command on mac was extremely slow.
* Reverted changes to get methods
* Added prefix query parameter
* Updated node status to use prefix based searching
* Fixed tests
* Removed truncation logic
