Ocelot/docs/features/configuration.rst
Tom Pallister 3ac9b3bd87
hacked together load balancing reroutes in fileconfig (#211)
* hacked together load balancing reroutes in fileconfig

* some renaming and refactoring

* more renames

* hacked away the old config json

* test for issue 213

* renamed key

* dont share ports

* oops

* updated docs

* mvoed docs around

* port being used
2018-01-31 20:34:55 +00:00

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Configuration
============
An example configuration can be found `here <https://github.com/TomPallister/Ocelot/blob/develop/test/Ocelot.ManualTest/configuration.json>`_.
There are two sections to the configuration. An array of ReRoutes and a GlobalConfiguration.
The ReRoutes are the objects that tell Ocelot how to treat an upstream request. The Global
configuration is a bit hacky and allows overrides of ReRoute specific settings. It's useful
if you don't want to manage lots of ReRoute specific settings.
.. code-block:: json
{
"ReRoutes": [],
"GlobalConfiguration": {}
}
Here is an example ReRoute configuration, You don't need to set all of these things but this is everything that is available at the moment:
.. code-block:: json
{
"DownstreamPathTemplate": "/",
"UpstreamPathTemplate": "/",
"UpstreamHttpMethod": [
"Get"
],
"AddHeadersToRequest": {},
"AddClaimsToRequest": {},
"RouteClaimsRequirement": {},
"AddQueriesToRequest": {},
"RequestIdKey": "",
"FileCacheOptions": {
"TtlSeconds": 0,
"Region": ""
},
"ReRouteIsCaseSensitive": false,
"ServiceName": "",
"DownstreamScheme": "http",
"DownstreamHostAndPorts": [
{
"Host": "localhost",
"Port": 51876,
}
],
"QoSOptions": {
"ExceptionsAllowedBeforeBreaking": 0,
"DurationOfBreak": 0,
"TimeoutValue": 0
},
"LoadBalancer": "",
"RateLimitOptions": {
"ClientWhitelist": [],
"EnableRateLimiting": false,
"Period": "",
"PeriodTimespan": 0,
"Limit": 0
},
"AuthenticationOptions": {
"AuthenticationProviderKey": "",
"AllowedScopes": []
},
"HttpHandlerOptions": {
"AllowAutoRedirect": true,
"UseCookieContainer": true
},
"UseServiceDiscovery": false
}
More information on how to use these options is below..
Follow Redirects / Use CookieContainer
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Use HttpHandlerOptions in ReRoute configuration to set up HttpHandler behavior:
- _AllowAutoRedirect_ is a value that indicates whether the request should follow redirection responses.
Set it true if the request should automatically follow redirection responses from the Downstream resource; otherwise false. The default value is true.
- _UseCookieContainer_ is a value that indicates whether the handler uses the CookieContainer property to store server cookies and uses these cookies when sending requests.
The default value is true.
Store configuration in consul
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
If you add the following when you register your services Ocelot will attempt to store and retrieve its configuration in consul KV store.
.. code-block:: csharp
services
.AddOcelot(Configuration)
.AddStoreOcelotConfigurationInConsul();
You also need to add the following to your configuration.json. This is how Ocelot
finds your Consul agent and interacts to load and store the configuration from Consul.
.. code-block:: json
"GlobalConfiguration": {
"ServiceDiscoveryProvider": {
"Host": "localhost",
"Port": 9500
}
}
I decided to create this feature after working on the raft consensus algorithm and finding out its super hard. Why not take advantage of the fact Consul already gives you this!
I guess it means if you want to use Ocelot to its fullest you take on Consul as a dependency for now.
This feature has a 3 second ttl cache before making a new request to your local consul agent.