mirror of
https://github.com/nsnail/Ocelot.git
synced 2025-04-22 12:22:50 +08:00
aa55fe34cb
* #296 renamed configuration.json to ocelot.json in preparation * removed things we dont need for tests * another file we dont need * removed some async we dont need * refactoring to consolidate configuration code * removed another pointless abstraction * #296 started writing merge code * #296 coming up with ideas for this config merging * #296 still hacking this idea around * #296 will now do a crappy merge on the configuration * #296 change so tests pass on windows
60 lines
2.4 KiB
ReStructuredText
60 lines
2.4 KiB
ReStructuredText
Load Balancer
|
|
=============
|
|
|
|
Ocelot can load balance across available downstream services for each ReRoute. This means you can scale your downstream services and Ocelot can use them effectively.
|
|
|
|
The type of load balancer available are:
|
|
|
|
LeastConnection - tracks which services are dealing with requests and sends new requests to service with least existing requests. The algorythm state is not distributed across a cluster of Ocelot's.
|
|
|
|
RoundRobin - loops through available services and sends requests. The algorythm state is not distributed across a cluster of Ocelot's.
|
|
|
|
NoLoadBalancer - takes the first available service from config or service discovery.
|
|
|
|
You must choose in your configuration which load balancer to use.
|
|
|
|
Configuration
|
|
^^^^^^^^^^^^^
|
|
|
|
The following shows how to set up multiple downstream services for a ReRoute using ocelot.json and then select the LeadConnection load balancer. This is the simplest way to get load balancing set up.
|
|
|
|
.. code-block:: json
|
|
|
|
{
|
|
"DownstreamPathTemplate": "/api/posts/{postId}",
|
|
"DownstreamScheme": "https",
|
|
"DownstreamHostAndPorts": [
|
|
{
|
|
"Host": "10.0.1.10",
|
|
"Port": 5000,
|
|
},
|
|
{
|
|
"Host": "10.0.1.11",
|
|
"Port": 5000,
|
|
}
|
|
],
|
|
"UpstreamPathTemplate": "/posts/{postId}",
|
|
"LoadBalancer": "LeastConnection",
|
|
"UpstreamHttpMethod": [ "Put", "Delete" ]
|
|
}
|
|
|
|
|
|
Service Discovery
|
|
^^^^^^^^^^^^^^^^^
|
|
|
|
The following shows how to set up a ReRoute using service discovery then select the LeadConnection load balancer.
|
|
|
|
.. code-block:: json
|
|
|
|
{
|
|
"DownstreamPathTemplate": "/api/posts/{postId}",
|
|
"DownstreamScheme": "https",
|
|
"UpstreamPathTemplate": "/posts/{postId}",
|
|
"UpstreamHttpMethod": [ "Put" ],
|
|
"ServiceName": "product",
|
|
"LoadBalancer": "LeastConnection",
|
|
"UseServiceDiscovery": true
|
|
}
|
|
|
|
When this is set up Ocelot will lookup the downstream host and port from the service discover provider and load balance requests across any available services. If you add and remove services from the
|
|
service discovery provider (consul) then Ocelot should respect this and stop calling services that have been removed and start calling services that have been added. |