Docker Discovery Service

1. Presentation By:
Mohammadreza Amini
Amir Arsalan
Autumn 2015
IRAN OpenStack Users Group
Discovery Service

2. Agenda
Discovery Service
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Pre introduction
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What is Discovery Service?
●
Global
●
In Docker ecosystem
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How Does Service Discovery Work?
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Failure Detection
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Docker Discovery Service Tools

3. Discovery Service
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Pre introduction

4. Discovery Service
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Scaling
Scheduling
Failure Detection
programmatically
Docker Production Environment

5. Discovery Service
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What is Discovery Service?

6. Discovery Service allow automatic detection of devices and services offered by
these devices on a computer network.
Discovery Service protocol example:
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DHCP
Discovery Service
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GlobalGlobal

7. Discovery Service implemented as a distributed key-value store that keep
container configuration and information details.
Discovery Service
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In Docker EcosystemIn Docker Ecosystem

8. Discovery Service
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How Does Service Discovery work?

9. Each service discovery tool provides an API that components can use to set or
retrieve data.
Typically the discovery service is implemented as a key-value store accessible using
standard http methods.
Discovery Service
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10. Discovery Service
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Failure Detection

11. service discovery platforms allow values to be set with a configurable timeout.
The component can set a value with a timeout, and ping the discovery service at
regular intervals to reset the timeout.
If the component fails and the timeout is reached, that instance's connection info
is removed from the store. (health checking)
Discovery Service
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12. Discovery Service
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Docker Discovery Service tools

13. ● Etcd: This tool was created by the makers of CoreOS to provide service
discovery and globally distributed configuration to both containers and the host
systems themselves. It implements an http API and has a command line client
available on each host machine.
● consul: This service discovery platform has many advanced features that
make it stand out including configurable health checks, ACL functionality,
HAProxy configuration, etc.
● Zookeeper
Discovery Service
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14. Allocating Resources
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Any Question?

15. Allocating Resources
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Stay in Touch and Join Us:
● Home Page: OpenStack.ir
● Meetup age: Meetup.com/IranOpenStack
● Mailing List: OpenStackir@Lists.OpenStack.org
● Twitter: @OpenStackIR , #OpenStackIRAN
● IRC Channel on FreeNode: #OpenStack-ir

16. Allocating Resources
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Mohammadreza Amini
Linux Administrator
Mohammadreza@openstack.ir
Amir Arsalan
Python Developer
Amir@arsalan.cloud
Thank You