Module client

source code

Ganeti confd client

Clients can use the confd client library to send requests to a group of master candidates running confd. The expected usage is through the asyncore framework, by sending queries, and asynchronously receiving replies through a callback.

This way the client library doesn't ever need to "wait" on a particular answer, and can proceed even if some udp packets are lost. It's up to the user to reschedule queries if they haven't received responses and they need them.

Example usage:

 client = ConfdClient(...) # includes callback specification
 req = confd_client.ConfdClientRequest(type=constants.CONFD_REQ_PING)
 client.SendRequest(req)
 # then make sure your client calls asyncore.loop() or daemon.Mainloop.Run()
 # ... wait ...
 # And your callback will be called by asyncore, when your query gets a
 # response, or when it expires.

You can use the provided ConfdFilterCallback to act as a filter, only passing "newer" answer to your callback, and filtering out outdated ones, or ones confirming what you already got.

Imports: time, random, utils, constants, objects, serializer, daemon, errors, confd, ssconf, compat, netutils