spring-cloud-config

Spring Platform Config provides server and client-side support for externalized configuration in a distributed system. With the Config Server you have a central place to manage external properties for the applications in your origanization, across all environments. The concepts on both sides map identically to the Spring Environment and PropertySource abstractions, so they fit very well with Spring applications. As an application moves through the deployment pipeline from dev to test and into production you can manage the configuration that needs to change between those environments and be certain that applications have everything they need to run when they migrate.

Quick Start

Start the server:

$ cd spring-platform-config-server
$ mvn spring-boot:run

Then try it:

$ curl localhost:8888/foo/development
{"name":"development","label":"master","propertySources":[
  {"name":"https://github.com/scratches/config-repo/foo-development.properties","source":{"bar":"spam"}},
  {"name":"https://github.com/scratches/config-repo/foo.properties","source":{"foo":"bar"}}
]}

The default strategy for locating property sources is to clone a GIT repository (at "spring.platform.config.uri") and use it to initialize a SpringApplication. The application's Environment is used to enumerate property sources. The service has resources in the form:

/{name}/{profile}[/{label}]

where the "name" is used as the config name in the SpringApplication (i.e. what is normally "application"), "profile" is an active profile (or comma-separated list of properties), and "label" is an optional git label (defaults to "master").

Client Side Usage

Build a client (e.g. see the test cases for the config-client) as a Spring Boot application that depends on spring-platform-config-client. When it runs it will pick up the external configuration from the default local config server on port 8888. To modify the startup behaviour change the location of the server using bootstrap.properties (like application.properties but for the bootstrap phase of an application context), e.g.

spring.platform.config.url: http://myconfigserver.com

TODO: add a sample app.