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https://issues.apache.org/jira/browse/MESOS-2018?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adam B updated MESOS-2018:
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Priority: Critical (was: Major)
> Dynamic Reservation
> -------------------
>
> Key: MESOS-2018
> URL: https://issues.apache.org/jira/browse/MESOS-2018
> Project: Mesos
> Issue Type: Epic
> Components: allocation, framework, master, slave
> Reporter: Adam B
> Assignee: Michael Park
> Priority: Critical
> Labels: mesosphere, offer, persistence, reservations, resource,
> stateful, storage
>
> h3. Overview
> This is a feature to provide better support for running stateful services on
> Mesos such as HDFS (Distributed Filesystem), Cassandra (Distributed
> Database), or MySQL (Local Database).
> Current resource reservations (henceforth called "static" reservations) are
> statically determined by the slave operator at slave start time, and
> individual frameworks have no authority to reserve resources themselves.
> Dynamic reservations allow a framework to dynamically reserve offered
> resources, such that those resources will only be re-offered to the same
> framework (or other frameworks with the same role).
> This is especially useful if the framework's task stored some state on the
> slave, and needs a guaranteed set of resources reserved so that it can
> re-launch a task on the same slave to recover that state.
> h3. Planned Stages
> 1. MESOS-2489: Enable a framework to perform reservation operations.
> The goal of this stage is to allow the framework to send back a
> Reserve/Unreserve operation which gets validated by the master and updates
> the allocator resources. The allocator's {{allocate}} logic is left unchanged
> and the resources get offered back to the framework's role as desired.
> 2. MESOS-2491: Persist the reservation state on the slave.
> The goal of this stage is to persist the reservation state on the slave.
> Currently the master knows to store the persistent volumes in the
> {{checkpointedResources}} data structure which gets sent to individual slaves
> to be checkpointed. We will update the master such that dynamically reserved
> resources are stored in the {{checkpointedResources}} as well. This stage
> also involves subtasks such as updating the slave re(register) logic to
> support slave re-starts.
> 3. MESOS-2600: Introduce reservation HTTP endpoints on the master.
> The goal of this stage is to enable operators to perform reservation
> operations via HTTP endpoints on the master.
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