In this talk, we'll give an overview of both of these systems and demonstrate how you can develop your own Nomad plugins.

1. Copyright © 2020 HashiCorp

2. HashiCorp Nomad
● Workload orchestrator: maps workload to compute resources.
● Designed to run any workload on any platform.
● Runs on Linux, Windows, or macOS.
● Runs Dockerized or legacy applications.
● Extensible runtimes via task driver plugins.
● Extensible hardware support using device plugins.

3. Demo

4. Chris Baker, PhD
Senior Engineer, Nomad Ecosystem Team
he/him

5. Demo
Nomad Plugin Architecture
Example Plugins
Outline

6. Nomad Cluster Architecture
SERVER
follower
SERVER
follower
CLIENT
SERVER
leader
replication
forwarding
replication
forwarding
CLIENT
CLIENT
plugins
allocations
Operator
job specification
resources
CLIENT
CLIENT
CLIENT
plugins
allocationsresources
CLIENT
CLIENT
CLIENT
plugins
allocationsresources

7. Nomad Plugin Architecture
> nomad agent -plugin-dir=plugins …

8. Nomad Plugin Architecture

9. Nomad Device Plugins

10. Device Plugin Interface
CODE EDITOR
type DevicePlugin interface {
Fingerprint(ctx context.Context) (<-chan *FingerprintResponse, error)
Reserve(deviceIDs []string) (*ContainerReservation, error)
Stats(ctx context.Context, int time.Duration) (<-chan *StatsResponse, error)
}

11. Nomad Task Driver Plugins

12. Driver Plugin Interface
CODE EDITOR
type DriverPlugin interface {
StartTask(*TaskConfig) (*TaskHandle, *DriverNetwork, error)
RecoverTask(*TaskHandle) error
WaitTask(...) (<-chan *ExitResult, error)
StopTask(...) error
DestroyTask(...) error
SignalTask(taskID string, signal string) error
ExecTask(...) (*ExecTaskResult, error)
}

13. https://github.com/cgbaker/hashitalk-2020-nomad-plugins
Demo
Code
Review

14. Extensibility through Plugins
Support for scheduling any workload against any hardware infrastructure.
Growing Ecosystem of Plugins
Numerous internal and external plugins to use as examples.
Future Plugin Systems
Future versions of Nomad will use plugins for further extensibility.
Conclusion

15. Demo available
on GitHub:
https://github.com/cgbaker/hashitalk-2020-nomad-plugins

16. Thank You
hello@hashicorp.com
www.hashicorp.com
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