public AdvertApiClient(IConfiguration configuration, HttpClient client, IMapper mapper)
{
this._client = client;
this._mapper = mapper;
var discoveryClient = new AmazonServiceDiscoveryClient();
var discoveryTask = discoveryClient.DiscoverInstancesAsync(new DiscoverInstancesRequest {
ServiceName = "advertapi",
NamespaceName = "WebAdvertisement"
});
discoveryTask.Wait();
// This is just an example and it shouldnot be run from Constructor. best to have its own class
/*
* Service Discovery does not provide LB, so one thing you can do is to randomize
* this list, you can try to linq expiration to randomize and randomly pick up
* any instance just to scatter the load across all the instances
*/
var instances = discoveryTask.Result.Instances;
// how to get Ip
var ipv4 = instances[0].Attributes["AWS_INSTANCE_IPV4"];
var port = instances[0].Attributes["AWS_INSTANCE_PORT"];
// then use ipv4 and port to create base url
_baseAddress = configuration.GetSection("AdvertApi").GetValue <string>("BaseUrl");
_client.BaseAddress = new Uri(_baseAddress);
}
public BaseAmazonDiscoveryHttpClient(string serviceNamespace,
string serviceName,
AmazonConfiguration amazonConfiguration,
HttpClient client) : base(client)
{
var discoverClient = new AmazonServiceDiscoveryClient(amazonConfiguration.Credentials,
amazonConfiguration.RegionEndpoint);
var discoverInstanceRequest = new DiscoverInstancesRequest
{
ServiceName = serviceName,
NamespaceName = serviceNamespace,
HealthStatus = HealthStatus.HEALTHY.Value
};
var discoveryTask = discoverClient.DiscoverInstancesAsync(discoverInstanceRequest);
discoveryTask.Wait();
var instances = discoveryTask.Result.Instances;
var instance = instances.FirstOrDefault();
var ipv4 = instance.Attributes["AWS_INSTANCE_IPV4"];
var port = instance.Attributes["AWS_INSTANCE_PORT"];
_baseUrl = $"http://{ipv4}:{port}";
}
private void DiscoverServiceUrl()
{
if (environment.IsDevelopment())
{
SetDefaultUrl();
}
else
{
var serviceDiscoveryClient = new AmazonServiceDiscoveryClient(Amazon.RegionEndpoint.EUWest2);
var task = serviceDiscoveryClient.DiscoverInstancesAsync(new DiscoverInstancesRequest
{
ServiceName = "advertapi",
NamespaceName = "WebAdvertisement",
});
task.Wait();
var instances = task.Result.Instances;
if (instances.Any())
{
var ipv4 = instances[0].Attributes["AWS_INSTANCE_IPV4"];
var port = instances[0].Attributes["AWS_INSTANCE_PORT"];
baseAddress = $"http://{ipv4}:{port}";
}
else
{
SetDefaultUrl();
}
}
}
public AdvertApiClient(IConfiguration configuration, HttpClient client, IMapper mapper)
{
_client = client;
_mapper = mapper;
var discoveryClient = new AmazonServiceDiscoveryClient();
var discoveryTask = discoveryClient.DiscoverInstancesAsync(new DiscoverInstancesRequest()
{
ServiceName = "AdvertAPI",
NamespaceName = "WebAdvertisement",
});
discoveryTask.GetAwaiter();
var instances = discoveryTask.Result.Instances;
var ipv4 = instances[0].Attributes["AWS_INSTANCE_IPV4"];
var port = instances[0].Attributes["AWS_INSTANCE_PORT"];
_baseAddress = configuration.GetSection("AdvertApi").GetValue <string>("BaseUrl");
}
