Hi all,
Exciting to hear discussions about this. You mention that you need to provide
the slave ID while making a reservation. Does this preclude the use case where
"I want to reserve X CPU + RAM across the entire cluster for R"?
Maybe I've misunderstood. I think the ticket for this use case is MESOS-1791.
--
Tom Arnfeld
Developer // DueDil
(+44) 7525940046
25 Christopher Street, London, EC2A 2BS
On Sat, Feb 21, 2015 at 1:38 AM, Jie Yu <yujie....@gmail.com> wrote:
> Hi,
> BenM, BenH, MPark and I had a sync today discussing reservations
> (dynamic+static) in Mesos. It was a very productive meeting and here are
> some notes I took from the meeting. I think all of us are on the same page
> now and are happy with the current design.
> - Jie
> --------
> 1) we still keep the static reservation, but we don't introduce a new
> reservation type for that. If role = R and reservation is none, then it's
> statically reserved (cannot be released by anyone).
> 2) /reserve and /unreserve endpoints.
> Specify the role, slaveid (or hostname, or both, and we validate),
> resources when reserving resources. It only takes resources from static *
> resources. The operator can reserve both OP and FW reservations.
> When hit the reserve endpoint, we use the offered resources and invoke the
> offer rescind mechanism.
> Question: should we release dynamic reservations when a framework is
> shutting down? Multiple frameworks might share the same role!
> 3) reservation id
> We might want to have a reservation id (the id can be the framework id as
> well). The goal is to distinguish who reserved this resources if two
> frameworks are under the same role.
> 4) introduce principal for reservation
> The idea is that we need to track who reserved a resource so that we can
> decide who can unreserve it. The principal and ACLs can help us setup those
> rules for deciding who can unreserve what.
> 5) protobuf
> message Resources {
> ...
> message Reservation {
> optional string principal;
> optional string reservation_id; // introduce it later maybe
> }
> ...
> optional string role [ Default = "*" ];
> optional Reservation reservation;
> }
