DownstreamHostAndPorts alias

[mariotacke]

My team and I are test-driving Ocelot for a new project. We are wondering if it is possible to alias the DownstreamHostAndPorts somehow without having to repeat it for many endpoints. This is especially important to us when we think about overriding host and port per environment.

For example, for development purposes, we want to have Host and Port set to localhost and 5005, but for staging and production to a different host name and port. I understand that this is possible to do via override, but we'd rather not duplicate the entire definition again.

We'd like to define multiple hosts and ports in the global configuration and reference them in the downstream host and ports section.

Example:

"GlobalConfiguration": {
  "BaseUrl": "https://our-system.net/api",
  "RequestIdKey": "X-Request-Id",
  "HostAndPorts": [
    {
      "Alias": "ServiceA",
      "Host": "localhost",
      "Port": "5005"
    }
  ]
}

Then, in the "ReRoutes" config, we'd use it instead of the host definition:

{
  "ReRoutes": [
    // other config
    "DownstreamHostAndPorts": [
      {
        "UseAlias": "ServiceA"
      }
    ]
  ]
}

Is this a use case you have come across? I guess, as a workaround, we could define host names in the hosts file of the system, but that requires all devs to have the same entries.

Specifications

• Version: 12.0.1
• Platform: dotnet core 2.1.5

[golavr]

@philproctor any update on this enhancement?
this feature will save a lot of configuration changes as @mariotacke mentioned
thanks

[gao-artur]

Check my answer on SO. It does exactly what you are asking for
https://stackoverflow.com/a/63601248/2557855

[NicoJuicy]

@gao-artur I had to put the configuration in my appsettings and not in the ocelot.json to make it work. But it solved my problem, thanks!

[raman-m]

The issue has been accepted due to ready PR #1353 :

• #692 Simplify downstream service config #1353

All interested parties are welcome to review the code.
But the spec above is not final, the discussion can continue...

[mariotacke]

Thanks all for finally addressing this. However, I must say I've moved on from this project since I filed this issue it in 2018. Going to un-assign myself.

[raman-m]

@mariotacke commented on Aug 11:

Sad to hear that!
What gateway project has your team migrated to?

[raman-m]

@NicoJuicy Welcome to #1353 (comment) ❕

[raman-m]

Hello everyone! Unfortunately, the previously linked PR #1353 has been closed.
I hope for more professional assistance from the Ocelot community...