public ResourcesService(
ILogger <ResourcesService> logger,
IOptions <BackendConfig> config,
IResourcesRepo resourcesRepo,
IStorageRepo storageRepo)
{
_logger = logger;
_config = config.Value;
_resourcesRepo = resourcesRepo;
_storageRepo = storageRepo;
}
public BackendProberTests()
{
// set up all the parameter needed for prober class
_backendId = "example service";
_backendConfig = new BackendConfig(
healthCheckOptions: new BackendConfig.BackendHealthCheckOptions(
enabled: true,
interval: TimeSpan.FromMilliseconds(100),
timeout: TimeSpan.FromSeconds(60),
port: 8000,
path: "/example"),
loadBalancingOptions: default);
public WebServerConfig(dynamic config)
{
try
{
// load the config data.
Enabled = config.enabled;
BindInterface = string.IsNullOrEmpty(config.bind) ? "127.0.0.1" : config.bind;
Port = config.port == 0 ? 80 : config.port;
Backend = new BackendConfig(config.backend);
Valid = true;
}
catch (Exception e)
{
Valid = false;
Log.Logger.ForContext <WebServerConfig>().Error(e, "Error loading web-server configuration");
}
}
public HealthProbeWorkerTests()
{
// Set up all the parameter needed for healthProberWorker.
Provide <IMonotonicTimer, MonotonicTimer>();
Provide <ILogger, Logger <HealthProbeWorker> >();
Mock <IProxyHttpClientFactoryFactory>()
.Setup(f => f.CreateFactory())
.Returns(new Mock <IProxyHttpClientFactory>().Object);
// Set up backends. We are going to fake multiple service for us to probe.
_backendManager = Provide <IBackendManager, BackendManager>();
_backendConfig = new BackendConfig(
healthCheckOptions: new BackendConfig.BackendHealthCheckOptions(
enabled: true,
interval: TimeSpan.FromSeconds(1),
timeout: TimeSpan.FromSeconds(1),
port: 8000,
path: "/example"),
loadBalancingOptions: default);
// This method gets called by the runtime. Use this method to add services to the container.
// For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
public void ConfigureServices(IServiceCollection services)
{
var configSection = Configuration.GetSection(nameof(BackendConfig));
if (configSection != null)
{
services.Configure <BackendConfig>(configSection);
BackendConfig = configSection.Get <BackendConfig>();
}
else
{
throw new System.Exception("Missing configuration for Backend service!");
}
// Loading and initializing the resouces repositories
var repoFactory = new ResourcesRepository.RepositoryFactory(
BackendConfig.ResourcesConfig.SubscriptionId,
BackendConfig.ResourcesConfig.ResourceGroupName
);
if (!BackendConfig.SecurityConfig.UseMSI)
{
repoFactory.ConfigureEnvironment(
BackendConfig.SecurityConfig.ClientId,
BackendConfig.SecurityConfig.ClientSecret,
BackendConfig.SecurityConfig.TenantId);
}
else
{
repoFactory.ConfigureEnvironment(BackendConfig.SecurityConfig.TenantId);
}
services.AddSingleton <ResourcesRepository.Interfaces.IResourcesRepo>(f => {
var logFac = f.GetService <Microsoft.Extensions.Logging.ILoggerFactory>();
return(repoFactory.CreateResourcesRepo(logFac));
});
services.AddSingleton <ResourcesRepository.Interfaces.IStorageRepo>(f => {
var logFac = f.GetService <Microsoft.Extensions.Logging.ILoggerFactory>();
return(repoFactory.CreateStorageRepo(logFac, false));
});
// GRPC Stuff
services.AddGrpc();
}
public long Register <T>(BackendConfig <T> backendConfig)
{
if (backendConfig == null)
{
throw new ArgumentNullException(nameof(backendConfig));
}
long maxTag = -1;
foreach (long existingTag in _registeredBackendConfigs.Keys)
{
if (existingTag > maxTag)
{
maxTag = existingTag;
}
}
long tag = maxTag + 1;
_registeredBackendConfigs.Add(tag, backendConfig);
return(tag);
}
/// <summary>
/// Initializes a new instance of the <see cref="BackendProber"/> class.
/// HealthProber is the unit that checks the health state for all destinations(replica) of a backend(service)
/// HealthProbe would query the health controller of the destination and update the health state for every destination
/// periodically base on the time interval user specified in backend.
/// </summary>
public BackendProber(string backendId, BackendConfig config, IDestinationManager destinationManager, IMonotonicTimer timer, ILogger <BackendProber> logger, IOperationLogger <BackendProber> operationLogger, HttpClient httpClient, IRandomFactory randomFactory)
{
Contracts.CheckValue(backendId, nameof(backendId));
Contracts.CheckValue(config, nameof(config));
Contracts.CheckValue(destinationManager, nameof(destinationManager));
Contracts.CheckValue(timer, nameof(timer));
Contracts.CheckValue(logger, nameof(logger));
Contracts.CheckValue(operationLogger, nameof(operationLogger));
Contracts.CheckValue(httpClient, nameof(httpClient));
Contracts.CheckValue(randomFactory, nameof(randomFactory));
BackendId = backendId;
Config = config;
_destinationManager = destinationManager;
_timer = timer;
_logger = logger;
_operationLogger = operationLogger;
_randomFactory = randomFactory;
_healthControllerUrl = new Uri(Config.HealthCheckOptions.Path, UriKind.Relative);
_healthCheckInterval = Config.HealthCheckOptions.Interval;
_backendProbeHttpClient = httpClient;
}
/// <inheritdoc/>
public IBackendProber CreateBackendProber(string backendId, BackendConfig config, IEndpointManager endpointManager)
{
return(new BackendProber(backendId, config, endpointManager, _timer, _loggerFactory.CreateLogger <BackendProber>(), _operationLogger, _httpClientFactory.CreateHttpClient(), _randomFactory));
}
public EmployeesProxy(HttpClient httpClient, ILogger <EmployeesProxy> logger, IOptions <BackendConfig> options)
{
_httpClient = httpClient;
_logger = logger;
_backendConfig = options.Value;
}
public async Task ConfigureSecretBackendAsync(string path, BackendConfig backendConfig)
{
var resourcePath = string.Format(CultureInfo.InvariantCulture, "v1/sys/mounts/{0}/tune", path.Trim('/'));
await _polymath.MakeVaultApiRequest(resourcePath, HttpMethod.Post, backendConfig).ConfigureAwait(_polymath.VaultClientSettings.ContinueAsyncTasksOnCapturedContext);
}
/// <inheritdoc/>
public IBackendProber CreateBackendProber(string backendId, BackendConfig config, IDestinationManager destinationManager)
{
return(new BackendProber(backendId, config, destinationManager, _timer, _logger, _operationLogger, _httpClientFactory.CreateHttpClient(), _randomFactory));
}
public GreeterService(ILogger <GreeterService> logger, IOptions <BackendConfig> config)
{
_logger = logger;
_config = config.Value;
}
private void UpdateRuntimeBackends(DynamicConfigRoot config)
{
var desiredBackends = new HashSet <string>(StringComparer.Ordinal);
foreach (var configBackendPair in config.Backends)
{
var configBackend = configBackendPair.Value;
desiredBackends.Add(configBackendPair.Key);
_backendManager.GetOrCreateItem(
itemId: configBackendPair.Key,
setupAction: backend =>
{
UpdateRuntimeEndpoints(configBackend.Endpoints, backend.EndpointManager);
var newConfig = new BackendConfig(
new BackendConfig.BackendHealthCheckOptions(
enabled: configBackend.HealthCheckOptions?.Enabled ?? false,
interval: configBackend.HealthCheckOptions?.Interval ?? TimeSpan.FromSeconds(0),
timeout: configBackend.HealthCheckOptions?.Timeout ?? TimeSpan.FromSeconds(0),
port: configBackend.HealthCheckOptions?.Port ?? 0,
path: configBackend.HealthCheckOptions?.Path ?? string.Empty),
new BackendConfig.BackendLoadBalancingOptions(
mode: BackendConfig.BackendLoadBalancingOptions.LoadBalancingMode.First));
var currentBackendConfig = backend.Config.Value;
if (currentBackendConfig == null ||
currentBackendConfig.HealthCheckOptions.Enabled != newConfig.HealthCheckOptions.Enabled ||
currentBackendConfig.HealthCheckOptions.Interval != newConfig.HealthCheckOptions.Interval ||
currentBackendConfig.HealthCheckOptions.Timeout != newConfig.HealthCheckOptions.Timeout ||
currentBackendConfig.HealthCheckOptions.Port != newConfig.HealthCheckOptions.Port ||
currentBackendConfig.HealthCheckOptions.Path != newConfig.HealthCheckOptions.Path)
{
if (currentBackendConfig == null)
{
_logger.LogDebug("Backend {backendId} has been added.", configBackendPair.Key);
}
else
{
_logger.LogDebug("Backend {backendId} has changed.", configBackendPair.Key);
}
// Config changed, so update runtime backend
backend.Config.Value = newConfig;
}
});
}
foreach (var existingBackend in _backendManager.GetItems())
{
if (!desiredBackends.Contains(existingBackend.BackendId))
{
// NOTE 1: This is safe to do within the `foreach` loop
// because `IBackendManager.GetItems` returns a copy of the list of backends.
//
// NOTE 2: Removing the backend from `IBackendManager` is safe and existing
// ASP .NET Core endpoints will continue to work with their existing behavior (until those endpoints are updated)
// and the Garbage Collector won't destroy this backend object while it's referenced elsewhere.
_logger.LogDebug("Backend {backendId} has been removed.", existingBackend.BackendId);
_backendManager.TryRemoveItem(existingBackend.BackendId);
}
}
}
