(feature): sever side agent implementation

README.md

@@ -123,3 +123,63 @@ frontend web
 backend acme_challenge_backend
     server acme_challenge 127.0.0.1:8080
 ```
+
+
+
+
+## MaksIT agent
+
+```bash
+openssl rand -base64 32
+```
+
+```bash
+sudo rpm -Uvh https://packages.microsoft.com/config/centos/8/packages-microsoft-prod.rpm
+sudo dnf install -y dotnet-sdk-8.0
+```
+
+
+Copy sources to
+
+```bash
+sudo mkdir -p /opt/maks-it-agent
+```
+
+
+```bash
+dotnet build --configuration Release
+dotnet publish -c Release -o /opt/maks-it-agent
+```
+
+
+
+
+```bash
+sudo nano /etc/systemd/system/maks-it-agent.service
+```
+
+```bash
+[Unit]
+Description=Maks-IT Agent
+After=network.target
+
+[Service]
+WorkingDirectory=/opt/maks-it-agent
+ExecStart=/usr/bin/dotnet /opt/maks-it-agent/Agent.dll --urls "http://*:5000"
+Restart=always
+# Restart service after 10 seconds if the dotnet service crashes:
+RestartSec=10
+KillSignal=SIGINT
+SyslogIdentifier=dotnet-servicereloader
+User=root
+Environment=ASPNETCORE_ENVIRONMENT=Production
+
+[Install]
+WantedBy=multi-user.target
+```
+
+```bash
+sudo systemctl daemon-reload
+sudo systemctl enable --now maks-it-agent.service
+sudo systemctl status maks-it-agent.service
+```

src/Agent/Agent.csproj

@@ -0,0 +1,23 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Models\Models.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="build_and_deploy.sh">
+      <CopyToOutputDirectory>Never</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
+</Project>

src/Agent/Configuration.cs

@@ -0,0 +1,6 @@
+namespace MaksIT.Agent {
+  public class Configuration {
+    public required string ApiKey { get; set; }
+    public required string CertsPath { get; set; }
+  }
+}

src/Agent/Controllers/CertsController.cs

@@ -0,0 +1,41 @@
+
+using System.Diagnostics;
+
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Options;
+
+using MaksIT.Models.Agent.Requests;
+
+namespace MaksIT.Agent.Controllers;
+
+[ApiController]
+[Route("[controller]")]
+public class CertsController : ControllerBase {
+
+  private readonly Configuration _appSettings;
+
+  public CertsController(
+     IOptions<Configuration> appSettings
+  ) {
+    _appSettings = appSettings.Value;
+  }
+
+  [HttpPost("[action]")]
+  public IActionResult Upload([FromBody] CertsUploadRequest requestData) {
+    if (!Request.Headers.TryGetValue("X-API-KEY", out var extractedApiKey)) {
+      return Unauthorized("API Key is missing");
+    }
+
+    if (!_appSettings.ApiKey.Equals(extractedApiKey)) {
+      return Unauthorized("Unauthorized client");
+    }
+
+    foreach (var (fileName, fileContent) in requestData.Certs) {
+      System.IO.File.WriteAllText(Path.Combine(_appSettings.CertsPath, fileName), fileContent);
+    }
+
+    return Ok("Certificates uploaded successfully");
+  }
+
+}
+

src/Agent/Controllers/HelloWorldController.cs

@@ -0,0 +1,14 @@
+using Microsoft.AspNetCore.Mvc;
+
+namespace Agent.Controllers {
+
+  [ApiController]
+  [Route("[controller]")]
+  public class HelloWorldController : ControllerBase {
+
+    [HttpGet]
+    public IActionResult Get() {
+      return Ok("Hello, World!");
+    }
+  }
+}

src/Agent/Controllers/ServiceController.cs

@@ -0,0 +1,61 @@
+using System.Diagnostics;
+using MaksIT.Models.Agent.Requests;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Options;
+
+namespace MaksIT.Agent.Controllers;
+
+[ApiController]
+[Route("[controller]")]
+public class ServiceController : ControllerBase {
+
+  private readonly Configuration _appSettings;
+
+  public ServiceController(
+    IOptions<Configuration> appSettings
+  ) {
+    _appSettings = appSettings.Value;
+  }
+
+  [HttpPost("[action]")]
+  public IActionResult Reload([FromBody] ServiceReloadRequest requestData) {
+    var serviceName = requestData.ServiceName;
+
+    if (!Request.Headers.TryGetValue("X-API-KEY", out var extractedApiKey)) {
+      return Unauthorized("API Key is missing");
+    }
+
+    if (!_appSettings.ApiKey.Equals(extractedApiKey)) {
+      return Unauthorized("Unauthorized client");
+    }
+
+    try {
+      var processStartInfo = new ProcessStartInfo {
+        FileName = "/bin/systemctl",
+        Arguments = $"reload {serviceName}",
+        RedirectStandardOutput = true,
+        RedirectStandardError = true,
+        UseShellExecute = false,
+        CreateNoWindow = true
+      };
+
+      using (var process = new Process { StartInfo = processStartInfo }) {
+        process.Start();
+        process.WaitForExit();
+
+        var output = process.StandardOutput.ReadToEnd();
+        var error = process.StandardError.ReadToEnd();
+
+        if (process.ExitCode != 0) {
+          return StatusCode(500, $"Error reloading service: {error}");
+        }
+
+        return Ok($"Service {serviceName} reloaded successfully: {output}");
+      }
+    }
+    catch (Exception ex) {
+      return StatusCode(500, $"Exception: {ex.Message}");
+    }
+  }
+}
+

src/Agent/Program.cs

@@ -0,0 +1,34 @@
+using MaksIT.Agent;
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Extract configuration
+var configuration = builder.Configuration;
+
+// Configure strongly typed settings objects
+var configurationSection = configuration.GetSection("Configuration");
+var appSettings = configurationSection.Get<Configuration>() ?? throw new ArgumentNullException();
+
+// Allow configurations to be available through IOptions<Configuration>
+builder.Services.Configure<Configuration>(configurationSection);
+
+// Add services to the container.
+
+builder.Services.AddControllers();
+// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment()) {
+  app.UseSwagger();
+  app.UseSwaggerUI();
+}
+
+app.UseAuthorization();
+
+app.MapControllers();
+
+app.Run();

src/Agent/Properties/launchSettings.json

@@ -0,0 +1,31 @@
+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:7748",
+      "sslPort": 0
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "applicationUrl": "http://localhost:5000",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

src/Agent/ServiceReloader.http

@@ -0,0 +1,6 @@
+@ServiceReloader_HostAddress = http://localhost:5186
+
+GET {{ServiceReloader_HostAddress}}/weatherforecast/
+Accept: application/json
+
+###

src/Agent/appsettings.Development.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

src/Agent/appsettings.json

@@ -0,0 +1,14 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*",
+
+  "Configuration": {
+    "ApiKey": "UGnCaElLLJClHgUeet/yr7vNvPf13b1WkDJQMfsiP6I=",
+    "CertsPath": "/etc/haproxy/certs"
+  }
+}

src/Agent/build_and_deploy.sh

@@ -0,0 +1,77 @@
+#!/bin/bash
+
+# Variables
+SERVICE_NAME="maks-it-agent"
+SERVICE_PORT="5000"
+SERVICE_FILE="/etc/systemd/system/$SERVICE_NAME.service"
+INSTALL_DIR="/opt/$SERVICE_NAME"
+DOTNET_EXEC="/usr/bin/dotnet"
+EXEC_CMD="$DOTNET_EXEC $INSTALL_DIR/Agent.dll --urls \"http://*:$SERVICE_PORT\""
+APPSETTINGS_FILE="appsettings.json"
+NO_NEW_KEY_FLAG="--no-new-key"
+
+# Update package index and install the Microsoft package repository
+sudo rpm -Uvh https://packages.microsoft.com/config/centos/8/packages-microsoft-prod.rpm
+sudo dnf install -y dotnet-sdk-8.0
+
+# Check if the service exists and stop it if it does
+if systemctl list-units --full -all | grep -Fq "$SERVICE_NAME.service"; then
+    sudo systemctl stop $SERVICE_NAME.service
+    sudo systemctl disable $SERVICE_NAME.service
+    sudo rm -f $SERVICE_FILE
+fi
+
+# Clean up the old files if they exist
+sudo rm -rf $INSTALL_DIR
+
+# Create the application directory
+sudo mkdir -p $INSTALL_DIR
+
+# Update appsettings.json if --no-new-key flag is not provided
+if [[ "$1" != "$NO_NEW_KEY_FLAG" ]]; then
+    NEW_API_KEY=$(openssl rand -base64 32)
+    jq --arg newApiKey "$NEW_API_KEY" '.Configuration.ApiKey = $newApiKey' $APPSETTINGS_FILE > tmp.$$.json && mv tmp.$$.json $APPSETTINGS_FILE
+fi
+
+# Build and publish the .NET application
+sudo dotnet build --configuration Release
+sudo dotnet publish -c Release -o $INSTALL_DIR
+
+# Create the systemd service unit file
+sudo bash -c "cat > $SERVICE_FILE <<EOL
+[Unit]
+Description=Maks-IT Agent
+After=network.target
+
+[Service]
+WorkingDirectory=$INSTALL_DIR
+ExecStart=$EXEC_CMD
+Restart=always
+RestartSec=10
+KillSignal=SIGINT
+SyslogIdentifier=dotnet-servicereloader
+User=root
+Environment=ASPNETCORE_ENVIRONMENT=Production
+
+[Install]
+WantedBy=multi-user.target
+EOL"
+
+# Reload systemd to recognize the new service, enable it to start on boot, and start the service now
+sudo systemctl daemon-reload
+sudo systemctl enable --now $SERVICE_NAME.service
+
+# Create the firewall service rule
+echo '<?xml version="1.0" encoding="utf-8"?>
+<service>
+    <short>Maks-IT Agent</short>
+    <port protocol="tcp" port="'$SERVICE_PORT'"/>
+</service>' > /etc/firewalld/services/maks-it-agent.xml
+
+sleep 10
+
+# Add the services to the firewall
+firewall-cmd --permanent --add-service=maks-it-agent
+
+# Reload the firewall
+firewall-cmd --reload

src/LetsEncrypt.sln

@@ -15,10 +15,14 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Tests", "Tests", "{3374FDB1
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SSHProviderTests", "Tests\SSHSerivceTests\SSHProviderTests.csproj", "{3937760A-FFB3-4A8C-ABD1-CDDCE1D977C4}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LetsEncryptServer", "LetsEncryptServer\LetsEncryptServer.csproj", "{B5F39E04-C2E3-49BF-82C2-9DEBAA949E3D}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "LetsEncryptServer", "LetsEncryptServer\LetsEncryptServer.csproj", "{B5F39E04-C2E3-49BF-82C2-9DEBAA949E3D}"
 EndProject
 Project("{E53339B2-1760-4266-BCC7-CA923CBCF16C}") = "docker-compose", "docker-compose.dcproj", "{0233E43F-435D-4309-B20C-ECD4BFBD2E63}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Agent", "Agent\Agent.csproj", "{871BDED3-C6AE-437D-9B45-3AA3F184D002}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Models", "Models\Models.csproj", "{6814169B-D4D0-40B2-9FA9-89997DD44C30}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -53,6 +57,14 @@ Global
 		{0233E43F-435D-4309-B20C-ECD4BFBD2E63}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{0233E43F-435D-4309-B20C-ECD4BFBD2E63}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{0233E43F-435D-4309-B20C-ECD4BFBD2E63}.Release|Any CPU.Build.0 = Release|Any CPU
+		{871BDED3-C6AE-437D-9B45-3AA3F184D002}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{871BDED3-C6AE-437D-9B45-3AA3F184D002}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{871BDED3-C6AE-437D-9B45-3AA3F184D002}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{871BDED3-C6AE-437D-9B45-3AA3F184D002}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6814169B-D4D0-40B2-9FA9-89997DD44C30}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6814169B-D4D0-40B2-9FA9-89997DD44C30}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6814169B-D4D0-40B2-9FA9-89997DD44C30}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6814169B-D4D0-40B2-9FA9-89997DD44C30}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

src/LetsEncryptServer/Configuration.cs

@@ -1,20 +1,17 @@
 namespace MaksIT.LetsEncryptServer {
 
-  public class Server {
-    public required string Ip { get; set; }
-    public required int SocketPort { get; set; }
-    public required int SSHPort { get; set; }
-    public required string Path { get; set; }
+  public class Agent {
+    public required string AgentHostname { get; set; }
+    public required int AgentPort { get; set; }
+    public required string AgentKey { get; set; }
 
-    public required string Username { get; set; }
-    public string? Password { get; set; }
-    public string[]? PrivateKeys { get; set; }
+    public required string ServiceToReload { get; set; }
   }
 
   public class Configuration {    
     public required string Production { get; set; }
     public required string Staging { get; set; }
     public required bool DevMode { get; set; }
-    public required Server Server { get; set; }
+    public required Agent Agent { get; set; }
   }
 }

src/LetsEncryptServer/Controllers/CertsFlowController.cs

@@ -3,8 +3,8 @@ using Microsoft.Extensions.Options;
 
 using DomainResults.Mvc;
 
-using MaksIT.LetsEncryptServer.Models.Requests;
 using MaksIT.LetsEncryptServer.Services;
+using MaksIT.Models.LetsEncryptServer.Requests;
 
 
 namespace MaksIT.LetsEncryptServer.Controllers;
@@ -107,8 +107,8 @@ public class CertsFlowController : ControllerBase {
   /// <param name="requestData"></param>
   /// <returns></returns>
   [HttpPost("[action]/{sessionId}")]
-  public IActionResult ApplyCertificates(Guid sessionId, [FromBody] GetCertificatesRequest requestData) {
-    var result = _certsFlowService.ApplyCertificates(sessionId, requestData);
+  public async Task<IActionResult> ApplyCertificates(Guid sessionId, [FromBody] GetCertificatesRequest requestData) {
+    var result = await _certsFlowService.ApplyCertificates(sessionId, requestData);
     return result.ToActionResult();
   }
 }

src/LetsEncryptServer/LetsEncryptServer.csproj

@@ -17,11 +17,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\LetsEncrypt\LetsEncrypt.csproj" />
-    <ProjectReference Include="..\SSHProvider\SSHProvider.csproj" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <Folder Include="Models\Responses\" />
+    <ProjectReference Include="..\Models\Models.csproj" />
   </ItemGroup>
 
 </Project>

src/LetsEncryptServer/Program.cs

@@ -28,6 +28,7 @@ builder.Services.AddMemoryCache();
 builder.Services.AddHttpClient<ILetsEncryptService, LetsEncryptService>();
 builder.Services.AddScoped<ICertsFlowService, CertsFlowService>();
 builder.Services.AddSingleton<ICacheService, CacheService>();
+builder.Services.AddHttpClient<IAgentService, AgentService>();
 
 var app = builder.Build();
 

src/LetsEncryptServer/Services/AgentService.cs

@@ -0,0 +1,72 @@
+using DomainResults.Common;
+using MaksIT.Models.Agent.Requests;
+using Microsoft.Extensions.Options;
+using System.Text;
+using System.Text.Json;
+
+namespace MaksIT.LetsEncryptServer.Services {
+
+  public interface IAgentService {
+    Task<IDomainResult> GetHelloWorld();
+    Task<IDomainResult> UploadCerts(Dictionary<string, string> certs);
+    Task<IDomainResult> ReloadService(string serviceName);
+  }
+
+  public class AgentService : IAgentService {
+
+    private readonly Configuration _appSettings;
+    private readonly ILogger<AgentService> _logger;
+    private readonly HttpClient _httpClient;
+
+    public AgentService(
+      IOptions<Configuration> appSettings,
+      ILogger<AgentService> logger,
+      HttpClient httpClient
+    ) {
+      _appSettings = appSettings.Value;
+      _logger = logger;
+      _httpClient = httpClient;
+    }
+
+    public Task<IDomainResult> GetHelloWorld() {
+      throw new NotImplementedException();
+    }
+
+    public async Task<IDomainResult> ReloadService(string serviceName) {
+      var requestBody = new ServiceReloadRequest { ServiceName = serviceName };
+      var endpoint = $"/Service/Reload";
+      return await SendHttpRequest(requestBody, endpoint);
+    }
+
+    public async Task<IDomainResult> UploadCerts(Dictionary<string, string> certs) {
+      var requestBody = new CertsUploadRequest { Certs = certs };
+      var endpoint = $"/Certs/Upload";
+      return await SendHttpRequest(requestBody, endpoint);
+    }
+
+    private async Task<IDomainResult> SendHttpRequest<T>(T requestBody, string endpoint) {
+      try {
+        var request = new HttpRequestMessage(HttpMethod.Post, $"{_appSettings.Agent.AgentHostname}:{_appSettings.Agent.AgentPort}{endpoint}") {
+          Content = new StringContent(JsonSerializer.Serialize(requestBody), Encoding.UTF8, "application/json")
+        };
+
+        request.Headers.Add("x-api-key", _appSettings.Agent.AgentKey);
+        request.Headers.Add("accept", "application/json");
+
+        var response = await _httpClient.SendAsync(request);
+
+        if (response.IsSuccessStatusCode) {
+          return IDomainResult.Success();
+        }
+        else {
+          _logger.LogError($"Request to {endpoint} failed with status code: {response.StatusCode}");
+          return IDomainResult.Failed($"Request to {endpoint} failed with status code: {response.StatusCode}");
+        }
+      }
+      catch (Exception ex) {
+        _logger.LogError(ex, "Something went wrong");
+        return IDomainResult.Failed("Something went wrong");
+      }
+    }
+  }
+}

src/LetsEncryptServer/Services/CertsFlowService.cs

@@ -6,8 +6,7 @@ using DomainResults.Common;
 
 using MaksIT.LetsEncrypt.Entities;
 using MaksIT.LetsEncrypt.Services;
-using MaksIT.LetsEncryptServer.Models.Requests;
-using MaksIT.SSHProvider;
+using MaksIT.Models.LetsEncryptServer.Requests;
 
 
 namespace MaksIT.LetsEncryptServer.Services;
@@ -24,7 +23,7 @@ public interface ICertsFlowService : ICertsFlowServiceBase {
   Task<IDomainResult> CompleteChallengesAsync(Guid sessionId);
   Task<IDomainResult> GetOrderAsync(Guid sessionId, GetOrderRequest requestData);
   Task<IDomainResult> GetCertificatesAsync(Guid sessionId, GetCertificatesRequest requestData);
-  (Dictionary<string, string>?, IDomainResult) ApplyCertificates(Guid sessionId, GetCertificatesRequest requestData);
+  Task<(Dictionary<string, string>?, IDomainResult)> ApplyCertificates(Guid sessionId, GetCertificatesRequest requestData);
 }
 
 public class CertsFlowService : ICertsFlowService {
@@ -33,6 +32,7 @@ public class CertsFlowService : ICertsFlowService {
   private readonly ILogger<CertsFlowService> _logger;
   private readonly ILetsEncryptService _letsEncryptService;
   private readonly ICacheService _cacheService;
+  private readonly IAgentService _agentService;
 
   private readonly string _acmePath;
 
@@ -40,12 +40,14 @@ public class CertsFlowService : ICertsFlowService {
     IOptions<Configuration> appSettings,
     ILogger<CertsFlowService> logger,
     ILetsEncryptService letsEncryptService,
-    ICacheService cashService
+    ICacheService cashService,
+    IAgentService agentService
   ) {
     _appSettings = appSettings.Value;
     _logger = logger;
     _letsEncryptService = letsEncryptService;
     _cacheService = cashService;
+    _agentService = agentService;
 
     _acmePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "acme");
     if (!Directory.Exists(_acmePath))
@@ -138,7 +140,7 @@ public class CertsFlowService : ICertsFlowService {
     return IDomainResult.Success();
   }
 
-  public (Dictionary<string, string>?, IDomainResult) ApplyCertificates(Guid sessionId, GetCertificatesRequest requestData) {
+  public async Task<(Dictionary<string, string>?, IDomainResult)> ApplyCertificates(Guid sessionId, GetCertificatesRequest requestData) {
     var results = new Dictionary<string, string>();
 
     foreach (var subject in requestData.Hostnames) {
@@ -150,16 +152,13 @@ public class CertsFlowService : ICertsFlowService {
       results.Add(subject, content);
     }
 
-    var uploadResult = UploadToServer(results);
-    if (!uploadResult.IsSuccess)
+    // TODO: send the certificates to the server
+    var uploadResult = await _agentService.UploadCerts(results);
+    if(!uploadResult.IsSuccess)
       return (null, uploadResult);
 
-    //var notifyResult = NotifyHaproxy(results);
-    //if (!notifyResult.IsSuccess)
-    //  return (null, notifyResult);
-
-    var reloadResult = ReloadServer();
-    if (!reloadResult.IsSuccess)
+    var reloadResult = await _agentService.ReloadService(_appSettings.Agent.ServiceToReload);
+    if(!reloadResult.IsSuccess)
       return (null, reloadResult);
 
     return IDomainResult.Success(results);
@@ -175,129 +174,6 @@ public class CertsFlowService : ICertsFlowService {
     return IDomainResult.Success(fileContent);
   }
 
-  private IDomainResult UploadToServer(Dictionary<string, string> results) {
-    var server = _appSettings.Server;
-
-    try {
-      using (SSHService sshClient = (server.PrivateKeys != null && server.PrivateKeys.Any(x => !string.IsNullOrWhiteSpace(x)))
-        ? new SSHService(_logger, server.Ip, server.SSHPort, server.Username, server.PrivateKeys)
-        : !string.IsNullOrWhiteSpace(server.Password)
-          ? new SSHService(_logger, server.Ip, server.SSHPort, server.Username, server.Password)
-          : throw new ArgumentNullException("Neither private keys nor password was provided")) {
-
-        var sshConnectResult = sshClient.Connect();
-        if (!sshConnectResult.IsSuccess)
-          return sshConnectResult;
-
-        foreach (var result in results) {
-          var uploadResult = sshClient.Upload(server.Path, result.Key, Encoding.UTF8.GetBytes(result.Value));
-          if (!uploadResult.IsSuccess)
-            return uploadResult;
-        }
-      }
-    }
-    catch (Exception ex) {
-      var message = "Unable to upload files to remote server";
-      _logger.LogError(ex, message);
-
-      return IDomainResult.CriticalDependencyError(message);
-    }
-
-    return IDomainResult.Success();
-  }
-  private IDomainResult ReloadServer() {
-    var server = _appSettings.Server;
-
-    try {
-      using (SSHService sshClient = (server.PrivateKeys != null && server.PrivateKeys.Any(x => !string.IsNullOrWhiteSpace(x)))
-        ? new SSHService(_logger, server.Ip, server.SSHPort, server.Username, server.PrivateKeys)
-        : !string.IsNullOrWhiteSpace(server.Password)
-          ? new SSHService(_logger, server.Ip, server.SSHPort, server.Username, server.Password)
-          : throw new ArgumentNullException("Neither private keys nor password was provided")) {
-
-        var sshConnectResult = sshClient.Connect();
-        if (!sshConnectResult.IsSuccess)
-          return sshConnectResult;
-
-        // TODO: Prefer to create the native linux service which can receive the signal to reload the services
-        return sshClient.RunSudoCommand("", "systemctl reload haproxy");
-      }
-    }
-    catch (Exception ex) {
-      var message = "Unable to upload files to remote server";
-      _logger.LogError(ex, message);
-
-      return IDomainResult.CriticalDependencyError(message);
-    }
-
-    return IDomainResult.Success();
-  }
-
-  /// <summary>
-  /// Currently not working
-  /// </summary>
-  /// <param name="results"></param>
-  /// <returns></returns>
-  private IDomainResult NotifyHaproxy(Dictionary<string, string> results) {
-    var server = _appSettings.Server;
-
-    try {
-      using (var client = new TcpClient(server.Ip, server.SocketPort))
-      using (var networkStream = client.GetStream())
-      using (var writer = new StreamWriter(networkStream, Encoding.ASCII))
-      using (var reader = new StreamReader(networkStream, Encoding.ASCII)) {
-        writer.AutoFlush = true;
-
-        foreach (var result in results) {
-          var certFile = result.Key;
-
-          // Prepare the certificate
-          string prepareCommand = $"new ssl cert {server.Path}/{certFile}";
-          writer.WriteLine(prepareCommand);
-          writer.Flush();
-          string prepareResponse = reader.ReadLine();
-          //if (prepareResponse.Contains("error", StringComparison.OrdinalIgnoreCase)) {
-          //  _logger.LogError($"Error while preparing certificate {certFile}: {prepareResponse}");
-          //  return IDomainResult.CriticalDependencyError($"Error while preparing certificate {certFile}");
-          //}
-
-          // Set the certificate
-          string setCommand = $"set ssl cert {server.Path}/{certFile} <<\n{result.Value}\n";
-          writer.WriteLine(setCommand);
-          writer.Flush();
-          string setResponse = reader.ReadLine();
-          //if (setResponse.Contains("error", StringComparison.OrdinalIgnoreCase)) {
-          //  _logger.LogError($"Error while setting certificate {certFile}: {setResponse}");
-          //  return IDomainResult.CriticalDependencyError($"Error while setting certificate {certFile}");
-          //}
-
-          // Commit the certificate
-          string commitCommand = $"commit ssl cert {server.Path}/{certFile}";
-          writer.WriteLine(commitCommand);
-          writer.Flush();
-          string commitResponse = reader.ReadLine();
-          //if (commitResponse.Contains("error", StringComparison.OrdinalIgnoreCase)) {
-          //  _logger.LogError($"Error while committing certificate {certFile}: {commitResponse}");
-          //  return IDomainResult.CriticalDependencyError($"Error while committing certificate {certFile}");
-          //}
-        }
-
-        _logger.LogInformation("Certificates committed successfully.");
-      }
-    }
-    catch (Exception ex) {
-      var message = "An error occurred while committing certificates";
-      _logger.LogError(ex, message);
-
-      return IDomainResult.CriticalDependencyError(message);
-    }
-
-    return IDomainResult.Success();
-  }
-
-
-
-
   private void DeleteExporedChallenges() {
     var currentDate = DateTime.Now;
 

src/LetsEncryptServer/appsettings.json

@@ -13,14 +13,12 @@
 
     "DevMode":  true,
 
-    "Server": {
-      "Ip": "192.168.1.4",
-      "SocketPort": 9999,
-      "SSHPort": 22,
-      "Path": "/etc/haproxy/certs",
-      "Username": "acme",
-      "PrivateKeys": [],
-      "Password": "acme"
+    "Agent": {
+      "AgentHostname": "http://lblsrv0001.corp.maks-it.com",
+      "AgentPort": 5000,
+      "AgentKey": "UGnCaElLLJClHgUeet/yr7vNvPf13b1WkDJQMfsiP6I=",
+
+      "ServiceToReload":  "haproxy"
     }
   }
 }

src/Models/Agent/Requests/CertsUploadRequest.cs

@@ -0,0 +1,7 @@
+namespace MaksIT.Models.Agent.Requests {
+  public class CertsUploadRequest {
+
+    public Dictionary<string, string> Certs { get; set; }
+
+  }
+}

src/Models/Agent/Requests/ServiceReloadRequest.cs

@@ -0,0 +1,11 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MaksIT.Models.Agent.Requests {
+  public class ServiceReloadRequest {
+    public string ServiceName { get; set; }
+  }
+}

src/Models/LetsEncryptServer/Requests/GetCerificatesRequest.cs

@@ -1,4 +1,4 @@
-namespace MaksIT.LetsEncryptServer.Models.Requests {
+namespace MaksIT.Models.LetsEncryptServer.Requests {
   public class GetCertificatesRequest {
     public string[] Hostnames { get; set; }
   }

src/Models/LetsEncryptServer/Requests/GetOrderRequest.cs

@@ -1,4 +1,4 @@
-namespace MaksIT.LetsEncryptServer.Models.Requests {
+namespace MaksIT.Models.LetsEncryptServer.Requests {
   public class GetOrderRequest {
     public string[] Hostnames { get; set; }
   }

src/Models/LetsEncryptServer/Requests/InitRequest.cs

@@ -4,7 +4,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace MaksIT.LetsEncryptServer.Models.Requests {
+namespace MaksIT.Models.LetsEncryptServer.Requests {
   public class InitRequest {
     public string[] Contacts { get; set; }
   }

src/Models/LetsEncryptServer/Requests/NewOrderRequest.cs

@@ -1,4 +1,4 @@
-namespace MaksIT.LetsEncryptServer.Models.Requests {
+namespace MaksIT.Models.LetsEncryptServer.Requests {
   public class NewOrderRequest {
     public string[] Hostnames { get; set; }
     

src/Models/Models.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Folder Include="Agent\Responses\" />
+    <Folder Include="LetsEncryptServer\Responses\" />
+  </ItemGroup>
+
+</Project>

src/Postman/LetsEncrypt Production.postman_collection.json

@@ -0,0 +1,479 @@
+{
+	"info": {
+		"_postman_id": "728f64b6-893b-43fa-802e-ee836d1dc372",
+		"name": "LetsEncrypt Production",
+		"schema": "https://schema.getpostman.com/json/collection/v2.1.0/collection.json",
+		"_exporter_id": "33635244"
+	},
+	"item": [
+		{
+			"name": "letsencrypt production",
+			"request": {
+				"method": "GET",
+				"header": [],
+				"url": {
+					"raw": "https://acme-v02.api.letsencrypt.org/directory",
+					"protocol": "https",
+					"host": [
+						"acme-v02",
+						"api",
+						"letsencrypt",
+						"org"
+					],
+					"path": [
+						"directory"
+					]
+				}
+			},
+			"response": []
+		},
+		{
+			"name": "configure client",
+			"event": [
+				{
+					"listen": "test",
+					"script": {
+						"exec": [
+							"// Ensure the response status code is 200 (OK)\r",
+							"if (pm.response.code === 200) {\r",
+							"    // Get the plain text response\r",
+							"    let responseBody = pm.response.text();\r",
+							"    \r",
+							"    // Remove the surrounding quotes if present\r",
+							"    responseBody = responseBody.replace(/^\"|\"$/g, '');\r",
+							"    \r",
+							"    // Check if the response body is a valid GUID\r",
+							"    if (/^[0-9a-fA-F-]{36}$/.test(responseBody)) {\r",
+							"        // Set the environment variable sessionId with the response\r",
+							"        pm.environment.set(\"sessionId\", responseBody);\r",
+							"        console.log(`sessionId set to: ${responseBody}`);\r",
+							"    } else {\r",
+							"        console.log(\"Response body is not a valid GUID\");\r",
+							"    }\r",
+							"} else {\r",
+							"    console.log(`Request failed with status code: ${pm.response.code}`);\r",
+							"}\r",
+							""
+						],
+						"type": "text/javascript",
+						"packages": {}
+					}
+				}
+			],
+			"request": {
+				"method": "POST",
+				"header": [
+					{
+						"key": "Content-Type",
+						"value": "application/json"
+					},
+					{
+						"key": "Accept",
+						"value": "application/json"
+					}
+				],
+				"url": {
+					"raw": "http://localhost:8080/CertsFlow/ConfigureClient",
+					"protocol": "http",
+					"host": [
+						"localhost"
+					],
+					"port": "8080",
+					"path": [
+						"CertsFlow",
+						"ConfigureClient"
+					]
+				}
+			},
+			"response": []
+		},
+		{
+			"name": "terms of service",
+			"request": {
+				"method": "GET",
+				"header": [],
+				"url": {
+					"raw": "http://localhost:8080/CertsFlow/TermsOfService/{{sessionId}}",
+					"protocol": "http",
+					"host": [
+						"localhost"
+					],
+					"port": "8080",
+					"path": [
+						"CertsFlow",
+						"TermsOfService",
+						"{{sessionId}}"
+					]
+				}
+			},
+			"response": []
+		},
+		{
+			"name": "init",
+			"event": [
+				{
+					"listen": "test",
+					"script": {
+						"exec": [
+							"// Ensure the response status code is 200 (OK)\r",
+							"if (pm.response.code === 200) {\r",
+							"    // Get the plain text response\r",
+							"    let responseBody = pm.response.text();\r",
+							"    \r",
+							"    // Remove the surrounding quotes if present\r",
+							"    responseBody = responseBody.replace(/^\"|\"$/g, '');\r",
+							"    \r",
+							"    // Check if the response body is a valid GUID\r",
+							"    if (/^[0-9a-fA-F-]{36}$/.test(responseBody)) {\r",
+							"        // Set the environment variable accountId with the response\r",
+							"        pm.environment.set(\"accountId\", responseBody);\r",
+							"        console.log(`accountId set to: ${responseBody}`);\r",
+							"    } else {\r",
+							"        console.log(\"Response body is not a valid GUID\");\r",
+							"    }\r",
+							"} else {\r",
+							"    console.log(`Request failed with status code: ${pm.response.code}`);\r",
+							"}\r",
+							""
+						],
+						"type": "text/javascript",
+						"packages": {}
+					}
+				},
+				{
+					"listen": "prerequest",
+					"script": {
+						"exec": [
+							"// Retrieve sessionId and accountId from environment variables or global variables\r",
+							"var sessionId = pm.environment.get(\"sessionId\") || pm.globals.get(\"sessionId\");\r",
+							"var accountId = pm.environment.get(\"accountId\") || pm.globals.get(\"accountId\");\r",
+							"\r",
+							"// Base URL without the optional accountId parameter\r",
+							"var baseUrl = `http://localhost:8080/CertsFlow/Init/${sessionId}`;\r",
+							"\r",
+							"// Append the accountId if it is provided\r",
+							"if (accountId) {\r",
+							"    pm.request.url = `${baseUrl}/${accountId}`;\r",
+							"} else {\r",
+							"    pm.request.url = baseUrl;\r",
+							"}"
+						],
+						"type": "text/javascript",
+						"packages": {}
+					}
+				}
+			],
+			"request": {
+				"method": "POST",
+				"header": [
+					{
+						"key": "Content-Type",
+						"value": "application/json"
+					},
+					{
+						"key": "Accept",
+						"value": "application/json"
+					}
+				],
+				"body": {
+					"mode": "raw",
+					"raw": "{\r\n  \"contacts\": [\r\n    \"maksym.sadovnychyy@gmail.com\"\r\n  ]\r\n}",
+					"options": {
+						"raw": {
+							"language": "json"
+						}
+					}
+				},
+				"url": {
+					"raw": "http://localhost:8080/CertsFlow/Init/{{sessionId}}/{{accountId}}",
+					"protocol": "http",
+					"host": [
+						"localhost"
+					],
+					"port": "8080",
+					"path": [
+						"CertsFlow",
+						"Init",
+						"{{sessionId}}",
+						"{{accountId}}"
+					]
+				}
+			},
+			"response": []
+		},
+		{
+			"name": "new order",
+			"event": [
+				{
+					"listen": "test",
+					"script": {
+						"exec": [
+							"// Ensure the response status code is 200 (OK)\r",
+							"if (pm.response.code === 200) {\r",
+							"    // Parse the JSON response\r",
+							"    let responseBody;\r",
+							"    try {\r",
+							"        responseBody = pm.response.json();\r",
+							"    } catch (e) {\r",
+							"        console.error(\"Failed to parse JSON response:\", e);\r",
+							"        return;\r",
+							"    }\r",
+							"\r",
+							"    // Check if the response is an array and has at least one element\r",
+							"    if (Array.isArray(responseBody) && responseBody.length > 0) {\r",
+							"        // Get the first element of the array\r",
+							"        const firstElement = responseBody[0];\r",
+							"        \r",
+							"        // Set the environment variable challenge with the first element\r",
+							"        pm.environment.set(\"challenge\", firstElement);\r",
+							"        console.log(`challenge set to: ${firstElement}`);\r",
+							"    } else {\r",
+							"        console.log(\"Response body is not an array or is empty\");\r",
+							"    }\r",
+							"} else {\r",
+							"    console.log(`Request failed with status code: ${pm.response.code}`);\r",
+							"}\r",
+							""
+						],
+						"type": "text/javascript",
+						"packages": {}
+					}
+				}
+			],
+			"request": {
+				"method": "POST",
+				"header": [
+					{
+						"key": "Content-Type",
+						"value": "application/json"
+					},
+					{
+						"key": "Accept",
+						"value": "application/json"
+					}
+				],
+				"body": {
+					"mode": "raw",
+					"raw": "{\r\n  \"hostnames\": [\r\n    \"maks-it.com\",\r\n    \"auth.maks-it.com\"\r\n  ],\r\n  \"challengeType\": \"http-01\"\r\n}",
+					"options": {
+						"raw": {
+							"language": "json"
+						}
+					}
+				},
+				"url": {
+					"raw": "http://localhost:8080/CertsFlow/NewOrder/{{sessionId}}",
+					"protocol": "http",
+					"host": [
+						"localhost"
+					],
+					"port": "8080",
+					"path": [
+						"CertsFlow",
+						"NewOrder",
+						"{{sessionId}}"
+					]
+				}
+			},
+			"response": []
+		},
+		{
+			"name": "acme-challenge local",
+			"request": {
+				"method": "GET",
+				"header": [],
+				"url": {
+					"raw": "http://localhost:8080/.well-known/acme-challenge/{{challenge}}",
+					"protocol": "http",
+					"host": [
+						"localhost"
+					],
+					"port": "8080",
+					"path": [
+						".well-known",
+						"acme-challenge",
+						"{{challenge}}"
+					]
+				}
+			},
+			"response": []
+		},
+		{
+			"name": "acme-challenge",
+			"request": {
+				"method": "GET",
+				"header": [],
+				"url": {
+					"raw": "http://maks-it.com/.well-known/acme-challenge/{{challenge}}",
+					"protocol": "http",
+					"host": [
+						"maks-it",
+						"com"
+					],
+					"path": [
+						".well-known",
+						"acme-challenge",
+						"{{challenge}}"
+					]
+				}
+			},
+			"response": []
+		},
+		{
+			"name": "complete challenges",
+			"request": {
+				"method": "POST",
+				"header": [
+					{
+						"key": "Content-Type",
+						"value": "application/json"
+					},
+					{
+						"key": "Accept",
+						"value": "application/json"
+					}
+				],
+				"body": {
+					"mode": "raw",
+					"raw": "",
+					"options": {
+						"raw": {
+							"language": "json"
+						}
+					}
+				},
+				"url": {
+					"raw": "http://localhost:8080/CertsFlow/CompleteChallenges/{{sessionId}}",
+					"protocol": "http",
+					"host": [
+						"localhost"
+					],
+					"port": "8080",
+					"path": [
+						"CertsFlow",
+						"CompleteChallenges",
+						"{{sessionId}}"
+					]
+				}
+			},
+			"response": []
+		},
+		{
+			"name": "get order",
+			"request": {
+				"method": "POST",
+				"header": [
+					{
+						"key": "Content-Type",
+						"value": "application/json"
+					},
+					{
+						"key": "Accept",
+						"value": "application/json"
+					}
+				],
+				"body": {
+					"mode": "raw",
+					"raw": "{\r\n  \"hostnames\": [\r\n    \"maks-it.com\",\r\n    \"auth.maks-it.com\"\r\n  ]\r\n}",
+					"options": {
+						"raw": {
+							"language": "json"
+						}
+					}
+				},
+				"url": {
+					"raw": "http://localhost:8080/CertsFlow/GetOrder/{{sessionId}}",
+					"protocol": "http",
+					"host": [
+						"localhost"
+					],
+					"port": "8080",
+					"path": [
+						"CertsFlow",
+						"GetOrder",
+						"{{sessionId}}"
+					]
+				}
+			},
+			"response": []
+		},
+		{
+			"name": "get certificates",
+			"request": {
+				"method": "POST",
+				"header": [
+					{
+						"key": "Content-Type",
+						"value": "application/json"
+					},
+					{
+						"key": "Accept",
+						"value": "application/json"
+					}
+				],
+				"body": {
+					"mode": "raw",
+					"raw": "{\r\n  \"hostnames\": [\r\n    \"maks-it.com\",\r\n    \"auth.maks-it.com\"\r\n  ]\r\n}",
+					"options": {
+						"raw": {
+							"language": "json"
+						}
+					}
+				},
+				"url": {
+					"raw": "http://localhost:8080/CertsFlow/GetCertificates/{{sessionId}}",
+					"protocol": "http",
+					"host": [
+						"localhost"
+					],
+					"port": "8080",
+					"path": [
+						"CertsFlow",
+						"GetCertificates",
+						"{{sessionId}}"
+					]
+				}
+			},
+			"response": []
+		},
+		{
+			"name": "apply certificates",
+			"request": {
+				"method": "POST",
+				"header": [
+					{
+						"key": "Content-Type",
+						"value": "application/json"
+					},
+					{
+						"key": "Accept",
+						"value": "application/json"
+					}
+				],
+				"body": {
+					"mode": "raw",
+					"raw": "{\r\n  \"hostnames\": [\r\n    \"maks-it.com\",\r\n    \"auth.maks-it.com\"\r\n  ]\r\n}",
+					"options": {
+						"raw": {
+							"language": "json"
+						}
+					}
+				},
+				"url": {
+					"raw": "http://localhost:8080/CertsFlow/ApplyCertificates/{{sessionId}}",
+					"protocol": "http",
+					"host": [
+						"localhost"
+					],
+					"port": "8080",
+					"path": [
+						"CertsFlow",
+						"ApplyCertificates",
+						"{{sessionId}}"
+					]
+				}
+			},
+			"response": []
+		}
+	]
+}

src/Postman/LetsEncrypt Staging.postman_collection.json

@@ -1,7 +1,7 @@
 {
 	"info": {
-		"_postman_id": "728f64b6-893b-43fa-802e-ee836d1dc372",
-		"name": "LetsEncrypt",
+		"_postman_id": "95186b61-1197-4a6e-a90f-d97223528d90",
+		"name": "LetsEncrypt Staging",
 		"schema": "https://schema.getpostman.com/json/collection/v2.1.0/collection.json",
 		"_exporter_id": "33635244"
 	},
@@ -28,27 +28,6 @@
 			},
 			"response": []
 		},
-		{
-			"name": "letsencrypt production",
-			"request": {
-				"method": "GET",
-				"header": [],
-				"url": {
-					"raw": "https://acme-v02.api.letsencrypt.org/directory",
-					"protocol": "https",
-					"host": [
-						"acme-v02",
-						"api",
-						"letsencrypt",
-						"org"
-					],
-					"path": [
-						"directory"
-					]
-				}
-			},
-			"response": []
-		},
 		{
 			"name": "configure client",
 			"event": [

src/Postman/Maks-IT Agent.postman_collection.json

@@ -0,0 +1,77 @@
+{
+	"info": {
+		"_postman_id": "1e13f461-ccaa-436a-92e4-e14c05131b96",
+		"name": "Maks-IT Agent",
+		"schema": "https://schema.getpostman.com/json/collection/v2.1.0/collection.json",
+		"_exporter_id": "33635244"
+	},
+	"item": [
+		{
+			"name": "reload service",
+			"request": {
+				"method": "POST",
+				"header": [
+					{
+						"key": "x-api-key",
+						"value": "{{agentKey}}"
+					},
+					{
+						"key": "Accept",
+						"value": "application/json"
+					},
+					{
+						"key": "Content-Type",
+						"value": "application/json"
+					}
+				],
+				"body": {
+					"mode": "raw",
+					"raw": "{\r\n    \"serviceName\": {{serviceName}}\r\n}",
+					"options": {
+						"raw": {
+							"language": "json"
+						}
+					}
+				},
+				"url": {
+					"raw": "http://lblsrv0001.corp.maks-it.com:5000/Service/Reload",
+					"protocol": "http",
+					"host": [
+						"lblsrv0001",
+						"corp",
+						"maks-it",
+						"com"
+					],
+					"port": "5000",
+					"path": [
+						"Service",
+						"Reload"
+					]
+				}
+			},
+			"response": []
+		},
+		{
+			"name": "hello world",
+			"request": {
+				"method": "GET",
+				"header": [],
+				"url": {
+					"raw": "http://lblsrv0001.corp.maks-it.com:5000/HelloWorld",
+					"protocol": "http",
+					"host": [
+						"lblsrv0001",
+						"corp",
+						"maks-it",
+						"com"
+					],
+					"port": "5000",
+					"path": [
+						"HelloWorld"
+					]
+				}
+			},
+			"response": []
+		}
+	]
+}