plugin request: HTTP status for galera (groundwork for future REST server)

Typical load balancing solutions check status with a TCP or HTTP connection. For galera, the presence of a TCP supported connection isn't sufficient.

What would be ideal is if there was a small single threaded plugin that talked enough basic HTTP to convince a load balancer if galera is SYNCED.

Access control can be done via firewall though like mysql a bind-address might be a viable configuration option.

step 1: Galera URLs

GET /galera/sync - returns 200 if in sync - 503 Sevice unavabilable
GET /galera/primary - returns 200 if in sync - 503 Sevice unavabilable

enhancement 2: RESTFUL status and system variables retrieval

retrieve global status/system variable value

GET /status/max_used_connections - returns 200 response with status variable value
GET /system/max_connections - returns 200 response with variable value

enhancement 3: collection info

GET /status - returns all global status
GET /systems - returns all global variables

enhancement 4: RESTFUL system variable change

plugin variable = auth_token=xxxxxxsfsaf.....

PUT /system/max_connections?auth_token=... - sets the value of a variable,

enhancement 5: extend to other plugs

Maybe other plugins could hook into their own base URL.