| Ralph Knag | 1fca6ac | 2017-12-05 12:05:57 -0500 | [diff] [blame] | 1 | .. This work is licensed under a Creative Commons Attribution 4.0 International License.
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| 2 | .. http://creativecommons.org/licenses/by/4.0
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| 3 |
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| 4 | Service Discovery
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| 5 | =================
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| 6 |
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| 7 | Service discovery is an architecture pattern used for components
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| 8 | (micro-services) to locate each other. The DCAE platform uses
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| 9 | `server-side
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| 10 | discovery <http://microservices.io/patterns/server-side-discovery.html>`__
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| 11 | and is using `Consul <https://www.consul.io/>`__ as the service registry
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| 12 | solution.
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| 13 |
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| Ralph Knag | d2cd31b | 2018-04-02 16:27:46 -0400 | [diff] [blame^] | 14 | Service Registration
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| Ralph Knag | 1fca6ac | 2017-12-05 12:05:57 -0500 | [diff] [blame] | 15 | --------------------
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| 16 |
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| 17 | All components are required to register with Consul in order to be
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| 18 | discovered. There are two methods of registration: self and 3rd party.
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| 19 | The DCAE platform uses 3rd party registration which means components
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| 20 | don’t actually make the registration calls but defers that
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| 21 | responsibility to a platform service.
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| 22 |
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| 23 | Implementation for Docker
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| 24 | ~~~~~~~~~~~~~~~~~~~~~~~~~
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| 25 |
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| 26 | `Registrator <http://gliderlabs.com/registrator/latest/>`__ is an open
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| 27 | source application that is responsible for registering all components
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| 28 | that run as Docker containers. Registrator watches the local Docker
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| 29 | engine’s activity log and will register and unregister a Docker
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| 30 | container when the container is started and stopped.
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| 31 |
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| 32 | Implementation for CDAP
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| 33 | ~~~~~~~~~~~~~~~~~~~~~~~
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| 34 |
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| 35 | The CDAP broker is a REST web service that is responsible for
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| 36 | registering all components that run as CDAP applications.
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