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Lang Martin a0a6766740 CSI: Scheduler knows about CSI constraints and availability (#6995) 
* structs: piggyback csi volumes on host volumes for job specs

* state_store: CSIVolumeByID always includes plugins, matches usecase

* scheduler/feasible: csi volume checker

* scheduler/stack: add csi volumes

* contributing: update rpc checklist

* scheduler: add volumes to State interface

* scheduler/feasible: introduce new checker collection tgAvailable

* scheduler/stack: taskGroupCSIVolumes checker is transient

* state_store CSIVolumeDenormalizePlugins comment clarity

* structs: remote TODO comment in TaskGroup Validate

* scheduler/feasible: CSIVolumeChecker hasPlugins improve comment

* scheduler/feasible_test: set t.Parallel

* Update nomad/state/state_store.go

Co-Authored-By: Danielle <dani@hashicorp.com>

* Update scheduler/feasible.go

Co-Authored-By: Danielle <dani@hashicorp.com>

* structs: lift ControllerRequired to each volume

* state_store: store plug.ControllerRequired, use it for volume health

* feasible: csi match fast path remove stale host volume copied logic

* scheduler/feasible: improve comments

Co-authored-by: Danielle <dani@builds.terrible.systems>
 		2020-03-23 13:58:29 -04:00
..
README.md docs: add Go versioning policy 2020-01-27 08:18:58 -08:00
checklist-command.md docs contributing: checklist-command 2020-03-23 13:58:29 -04:00
checklist-jobspec.md add note to check for job diff 2020-03-04 12:06:32 -05:00
checklist-rpc-endpoint.md CSI: Scheduler knows about CSI constraints and availability (#6995) 2020-03-23 13:58:29 -04:00
golang.md docs: updating from go1.13 -> 1.14 for 0.11 2020-03-02 12:09:13 -08:00

README.md

Nomad Codebase Documentation

This directory contains some documentation about the Nomad codebase, aimed at readers who are interested in making code contributions.

If you're looking for information on using Nomad, please instead refer to the Nomad website.

Architecture

The code for Nomad's major components is organized as:

  • api/ provides a Go client for Nomad's HTTP API.
  • client/ contains Nomad's client agent code.
  • command/ contains Nomad's CLI code.
  • nomad/ contains Nomad's server agent code.
  • ui/ contains Nomad's UI code.
  • website/ contains Nomad's website and documentation.

The high level control flow for many Nomad actions (via the CLI or UI) are:

# Read actions:
Client -> HTTP API -> RPC -> StateStore

# Actions that change state:
Client -> HTTP API -> RPC -> Raft -> FSM -> StateStore

Checklists

When adding new features to Nomad there are often many places to make changes. It is difficult to determine where changes must be made and easy to make mistakes.

The following checklists are meant to be copied and pasted into PRs to give developers and reviewers confidence that the proper changes have been made:

Tooling