consul启动 . http://192.168.1.6:8500/

#以server方式启动，UI可以访问，boot引导自己选为leader，网段内PC可访问
consul agent -server -ui -bootstrap -data-dir=data -client=0.0.0.0

建两个项目coreApi、coreApiClient 。分别nuget添加 Steeltoe.Discovery.Consul

在StartUp 配置服务  services.AddDiscoveryClient(Configuration);

appsettings.json 配置 coreApi 项目

"consul": {
"host": "192.168.1.6",
"port": 8500,
"discovery": {
"register": true,
"serviceName": "coreApi",
"preferIpAddress": true
}
}

coreApiClient 项目

"consul": {
"host": "192.168.1.6",
"port": 8500,
"discovery": {
"register": true,
"serviceName": "coreApiClient",
"preferIpAddress": true
}
}

coreApi项目提供服务

    \[HttpGet\]  
    public UsrDto getUsrDto()  
    {  
        var header = contextAccess.HttpContext.Request.Headers;  
        return new UsrDto()  
        {  
            Age = 34,  
            CreTime = DateTime.Now,  
            Id = $"BaseDirectory={AppContext.BaseDirectory},ApplicationName={env.ApplicationName},EnvironmentName={env.EnvironmentName}",  
            LoginAccount = configuration.GetSection("Urls").Value,  
            Score = 9823.123456m  
        };  
    }

    \[HttpPost\]  
    public async Task< string> addUsr(UsrDto usr, string age)  
    {  
        var token = Request.Headers\["Authorization"\].ToString();  
        await Task.Delay(3 \* 1000);  
        return token;  
    }

coreApiClient项目调用服务

public static class Ext {  
    public static async Task<string> Get(this System.Net.Http.HttpClient httpClient, string uri, string token = "", string tokenKey = "Authorization") {

        using var request = new HttpRequestMessage(HttpMethod.Get, uri);  
        request.Headers.TryAddWithoutValidation(tokenKey, token);  
        var resp = await httpClient.SendAsync(request);  
        var content = await resp.Content.ReadAsStringAsync();  
        return content;  
    }

    public static async Task<string> Post(this System.Net.Http.HttpClient httpClient, string uri, object data, string token="", string tokenKey= "Authorization") {

        using var request = new HttpRequestMessage(HttpMethod.Post, uri);  
        request.Headers.TryAddWithoutValidation(tokenKey, token);  
        request.Content = new StringContent(JsonConvert.SerializeObject(data), Encoding.UTF8, "application/json");  
        var resp = await httpClient.SendAsync(request);  
        var content = await resp.Content.ReadAsStringAsync();  
        return content;  
    }  
}

\[ApiController\]  
\[Route("\[controller\]/\[action\]")\]  
public class WeatherController : ControllerBase {

    System.Net.Http.HttpClient httpClient;  

    public WeatherController(Steeltoe.Discovery.IDiscoveryClient client) {  
        Steeltoe.Common.Discovery.DiscoveryHttpClientHandler httpClientHandler = new Steeltoe.Common.Discovery.DiscoveryHttpClientHandler(client);  
        httpClient = HttpClientHelper.GetHttpClient(httpClientHandler, 10 \* 1000);  
        //httpClient.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", "123456");

    }

    \[HttpGet\]  
    public async Task< string> getUsrDtoProxy() {  
        return await httpClient.Get("http://coreApi/usr/getUsrDto", "token");  
    }

    \[HttpGet\]  
    public async Task<string> addUsrProxy() {  
        return await httpClient.Post("http://coreApi/usr/addUsr?age=12"  
            , new { Id = "hc", Age = 34, CreTime = DateTime.Now, Score = 23.34 }  
            , "0987");  
    }  
}

运行两个项目，consul已经注册了

浏览器测试 coreApiClient 的两个接口

http://localhost:20001/Weather/getUsrDtoProxy  正常返回：

http://localhost:20001/Weather/addUsrProxy 浏览器等待3秒后 返回：0987

以上，只测试consul 服务注册与发现，get、post方式。

=======================================

下面，测试一下consul的配置管理 key/value

    \[HttpGet\]  
    public async Task< string> getConsulConfig(string key) {  
        using ConsulClient client = new ConsulClient((i) => {  
            i.Address = new Uri($"http://{configuration\["consul:host"\]}:{configuration\["consul:port"\]}");  
        });  
        var byteV = await client.KV.Get(key);  
        return Encoding.UTF8.GetString(byteV.Response.Value);  
    }

在consul配置 user、product，测试后可正常取出value。

如果是新建项目，配置项目可通过命令导出和导入：

#导出kv配置，从192.168.1.6节点，具体仅导出user项目，导出到文件consul-kv.json
consul kv export -http-addr=http://192.168.1.6:8500 user > consul-kv.json

#导入kv配置，从文件consul-kv.json，只导入文件中内容，不覆盖
consul kv import -http-addr=http://192.168.1.6:8500 @consul-kv.json