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Updated KubeProvider to use pod endpoints instead of service

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WebMed 2020-02-10 23:52:55 +01:00
parent fc3b6fdb8b
commit 88034a5f9f
4 changed files with 69 additions and 24 deletions
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41
src/Ocelot.Provider.Kubernetes/KubeApiClientExtensions/EndPointClientV1.cs Normal file
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@ -0,0 +1,41 @@
using HTTPlease;
using KubeClient;
using KubeClient.Models;
using KubeClient.ResourceClients;
using System;
using System.Threading;
using System.Threading.Tasks;
namespace Ocelot.Provider.Kubernetes.KubeApiClientExtensions
{
public class EndPointClientV1 : KubeResourceClient
{
public EndPointClientV1(IKubeApiClient client) : base(client)
{
}
public async Task<EndpointsV1> Get(string serviceName, string kubeNamespace = null, CancellationToken cancellationToken = default)
{
if (string.IsNullOrEmpty(serviceName)) throw new ArgumentNullException(nameof(serviceName));
var response = await Http.GetAsync(
Requests.Collection.WithTemplateParameters(new
{
Namespace = kubeNamespace ?? KubeClient.DefaultNamespace,
ServiceName = serviceName
}),
cancellationToken: cancellationToken
);
if (response.IsSuccessStatusCode)
return await response.ReadContentAsAsync<EndpointsV1>();
return null;
}
public static class Requests
{
public static readonly HttpRequest Collection = KubeRequest.Create("api/v1/namespaces/{Namespace}/endpoints/{ServiceName}");
}
}
}

12
src/Ocelot.Provider.Kubernetes/KubeApiClientExtensions/KubeClientExtensions.cs Normal file
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@ -0,0 +1,12 @@
using KubeClient;
namespace Ocelot.Provider.Kubernetes.KubeApiClientExtensions
{
public static class KubeClientExtensions
{
public static EndPointClientV1 EndPointsV1(this IKubeApiClient kubeClient)
{
return kubeClient.ResourceClient(client => new EndPointClientV1(client));
}
}
}

36
src/Ocelot.Provider.Kubernetes/KubeProvider.cs
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@ -6,14 +6,15 @@ using Ocelot.Values;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Ocelot.Provider.Kubernetes.KubeApiClientExtensions;
namespace Ocelot.Provider.Kubernetes
{
public class Kube : IServiceDiscoveryProvider
{
private KubeRegistryConfiguration kubeRegistryConfiguration;
private IOcelotLogger logger;
private IKubeApiClient kubeApi;
private readonly IOcelotLogger logger;
private readonly IKubeApiClient kubeApi;
public Kube(KubeRegistryConfiguration kubeRegistryConfiguration, IOcelotLoggerFactory factory, IKubeApiClient kubeApi)
{
@ -22,14 +23,13 @@ namespace Ocelot.Provider.Kubernetes
this.kubeApi = kubeApi;
}
public async Task<List<Service>> Get()
{
var service = await kubeApi.ServicesV1().Get(kubeRegistryConfiguration.KeyOfServiceInK8s, kubeRegistryConfiguration.KubeNamespace);
var endpoint = await kubeApi.EndPointsV1().Get(kubeRegistryConfiguration.KeyOfServiceInK8s, kubeRegistryConfiguration.KubeNamespace);
var services = new List<Service>();
if (IsValid(service))
if (endpoint != null && endpoint.Subsets.Any())
{
services.Add(BuildService(service));
services.AddRange(BuildServices(endpoint));
}
else
{
@ -38,25 +38,17 @@ namespace Ocelot.Provider.Kubernetes
return services;
}
private bool IsValid(ServiceV1 service)
private List<Service> BuildServices(EndpointsV1 endpoint)
{
if (string.IsNullOrEmpty(service.Spec.ClusterIP) || service.Spec.Ports.Count <= 0)
{
return false;
}
var services = new List<Service>();
return true;
}
private Service BuildService(ServiceV1 serviceEntry)
foreach (var subset in endpoint.Subsets)
{
var servicePort = serviceEntry.Spec.Ports.FirstOrDefault();
return new Service(
serviceEntry.Metadata.Name,
new ServiceHostAndPort(serviceEntry.Spec.ClusterIP, servicePort.Port),
serviceEntry.Metadata.Uid,
string.Empty,
Enumerable.Empty<string>());
services.AddRange(subset.Addresses.Select(address => new Service(endpoint.Metadata.Name,
new ServiceHostAndPort(address.Ip, subset.Ports.First().Port),
endpoint.Metadata.Uid, string.Empty, Enumerable.Empty<string>())));
}
return services;
}
}
}

4
src/Ocelot.Provider.Kubernetes/Ocelot.Provider.Kubernetes.csproj
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@ -28,8 +28,8 @@
</ItemGroup>
<ItemGroup>
<PackageReference Include="KubeClient" Version="2.3.4" />
<PackageReference Include="KubeClient.Extensions.DependencyInjection" Version="2.3.4" />
<PackageReference Include="KubeClient" Version="2.3.11" />
<PackageReference Include="KubeClient.Extensions.DependencyInjection" Version="2.3.11" />
</ItemGroup>
<ItemGroup>