public static IServiceCollection AddHealthChecksUI(this IServiceCollection services, string databaseName = "healthchecksdb")
{
var configuration = services.BuildServiceProvider()
.GetService <IConfiguration>();
var healthCheckSettings = new Settings();
var kubernetesDiscoverySettings = new KubernetesDiscoverySettings();
configuration.Bind(Keys.HEALTHCHECKSUI_SECTION_SETTING_KEY, healthCheckSettings);
configuration.Bind(Keys.HEALTHCHECKSUI_KUBERNETES_DISCOVERY_SETTING_KEY, kubernetesDiscoverySettings);
services
.AddOptions()
.Configure <Settings>(settings => configuration.Bind(Keys.HEALTHCHECKSUI_SECTION_SETTING_KEY, settings))
.AddSingleton <IHostedService, HealthCheckCollectorHostedService>()
.AddScoped <IHealthCheckFailureNotifier, WebHookFailureNotifier>()
.AddScoped <IHealthCheckReportCollector, HealthCheckReportCollector>()
.AddHttpClient(Keys.HEALTH_CHECK_HTTP_CLIENT_NAME);
services.AddDbContext <HealthChecksDb>(db =>
{
var connectionString = healthCheckSettings.HealthCheckDatabaseConnectionString;
if (string.IsNullOrWhiteSpace(connectionString))
{
var contentRoot = configuration[HostDefaults.ContentRootKey];
var path = Path.Combine(contentRoot, databaseName);
connectionString = $"Data Source={path}";
}
else
{
connectionString = Environment.ExpandEnvironmentVariables(connectionString);
}
db.UseSqlite(connectionString);
});
if (kubernetesDiscoverySettings.Enabled)
{
services.AddSingleton(kubernetesDiscoverySettings)
.AddHostedService <KubernetesDiscoveryHostedService>()
.AddHttpClient(Keys.K8S_DISCOVERY_HTTP_CLIENT_NAME, (provider, client) => client.ConfigureKubernetesClient(provider))
.ConfigureKubernetesMessageHandler()
.Services
.AddHttpClient(Keys.K8S_CLUSTER_SERVICE_HTTP_CLIENT_NAME);
}
var serviceProvider = services.BuildServiceProvider();
CreateDatabase(serviceProvider).Wait();
return(services);
}
static IServiceCollection AddKubernetesDiscoveryService(this IServiceCollection services, KubernetesDiscoverySettings kubernetesDiscoverySettings)
{
KubernetesClientConfiguration kubernetesConfig;
if (!string.IsNullOrEmpty(kubernetesDiscoverySettings.ClusterHost) && !string.IsNullOrEmpty(kubernetesDiscoverySettings.Token))
{
kubernetesConfig = new KubernetesClientConfiguration {
Host = kubernetesDiscoverySettings.ClusterHost,
AccessToken = kubernetesDiscoverySettings.Token,
// Some cloud services like Azure AKS use self-signed certificates not valid for httpclient.
// With this method we allow invalid certificates
SkipTlsVerify = true
};
}
else if (KubernetesClientConfiguration.IsInCluster())
{
kubernetesConfig = KubernetesClientConfiguration.InClusterConfig();
}
else
{
kubernetesConfig = KubernetesClientConfiguration.BuildConfigFromConfigFile();
}
services.AddSingleton(kubernetesDiscoverySettings)
.AddHostedService <KubernetesDiscoveryHostedService>()
.AddSingleton <IKubernetes>(new Kubernetes(kubernetesConfig))
.AddHttpClient(Keys.K8S_CLUSTER_SERVICE_HTTP_CLIENT_NAME);
return(services);
}
