Добавлен модуль Kubernetes MCP с DI и диагностикой ошибок

LazyBear.MCP/Services/Kubernetes/K8sPodsTools.cs

@@ -0,0 +1,166 @@
+using System.ComponentModel;
+using k8s;
+using k8s.Autorest;
+using ModelContextProtocol.Server;
+
+namespace LazyBear.MCP.Services.Kubernetes;
+
+[McpServerToolType]
+public sealed class K8sPodsTools(K8sClientProvider clientProvider, IConfiguration configuration)
+{
+    private readonly IKubernetes? _client = clientProvider.Client;
+    private readonly string? _clientInitializationError = clientProvider.InitializationError;
+    private readonly string _defaultNamespace = configuration["Kubernetes:DefaultNamespace"] ?? "default";
+
+    [McpServerTool, Description("Список подов в namespace")]
+    public async Task<string> ListPods(
+        [Description("Namespace Kubernetes")] string? @namespace = null,
+        CancellationToken cancellationToken = default)
+    {
+        var ns = ResolveNamespace(@namespace);
+        if (!TryGetClient(out var client, out var clientError))
+        {
+            return clientError;
+        }
+
+        try
+        {
+            var pods = await client.CoreV1.ListNamespacedPodAsync(ns, cancellationToken: cancellationToken);
+
+            if (pods.Items.Count == 0)
+            {
+                return $"В namespace '{ns}' поды не найдены.";
+            }
+
+            var lines = pods.Items.Select(pod =>
+            {
+                var podName = pod.Metadata?.Name ?? "unknown";
+                var phase = pod.Status?.Phase ?? "Unknown";
+                var node = pod.Spec?.NodeName ?? "-";
+                var restarts = pod.Status?.ContainerStatuses?.Sum(s => s.RestartCount) ?? 0;
+                return $"{podName}: phase={phase}, restarts={restarts}, node={node}";
+            });
+
+            return $"Поды namespace '{ns}':\n{string.Join('\n', lines)}";
+        }
+        catch (Exception ex)
+        {
+            return FormatError("list_pods", ns, ex);
+        }
+    }
+
+    [McpServerTool, Description("Статус pod по имени")]
+    public async Task<string> GetPodStatus(
+        [Description("Имя pod")] string name,
+        [Description("Namespace Kubernetes")] string? @namespace = null,
+        CancellationToken cancellationToken = default)
+    {
+        var ns = ResolveNamespace(@namespace);
+        if (!TryGetClient(out var client, out var clientError))
+        {
+            return clientError;
+        }
+
+        try
+        {
+            var pod = await client.CoreV1.ReadNamespacedPodAsync(name, ns, cancellationToken: cancellationToken);
+
+            var phase = pod.Status?.Phase ?? "Unknown";
+            var hostIp = pod.Status?.HostIP ?? "-";
+            var podIp = pod.Status?.PodIP ?? "-";
+            var conditions = pod.Status?.Conditions?.Select(c => $"{c.Type}={c.Status}") ?? [];
+
+            return $"Pod '{name}' в namespace '{ns}': phase={phase}, hostIp={hostIp}, podIp={podIp}, conditions=[{string.Join(", ", conditions)}]";
+        }
+        catch (Exception ex)
+        {
+            return FormatError("get_pod_status", ns, ex, name);
+        }
+    }
+
+    [McpServerTool, Description("Логи pod")]
+    public async Task<string> GetPodLogs(
+        [Description("Имя pod")] string name,
+        [Description("Namespace Kubernetes")] string? @namespace = null,
+        [Description("Имя контейнера")]
+        string? container = null,
+        [Description("Количество строк с конца")]
+        int? tailLines = 100,
+        CancellationToken cancellationToken = default)
+    {
+        var ns = ResolveNamespace(@namespace);
+        if (!TryGetClient(out var client, out var clientError))
+        {
+            return clientError;
+        }
+
+        try
+        {
+            await using var logStream = await client.CoreV1.ReadNamespacedPodLogAsync(
+                name,
+                ns,
+                container: container,
+                tailLines: tailLines,
+                cancellationToken: cancellationToken);
+
+            using var reader = new StreamReader(logStream);
+            var logs = await reader.ReadToEndAsync(cancellationToken);
+
+            if (string.IsNullOrWhiteSpace(logs))
+            {
+                return $"Логи pod '{name}' в namespace '{ns}' пустые.";
+            }
+
+            return logs;
+        }
+        catch (Exception ex)
+        {
+            return FormatError("get_pod_logs", ns, ex, name);
+        }
+    }
+
+    private string ResolveNamespace(string? @namespace)
+    {
+        return string.IsNullOrWhiteSpace(@namespace) ? _defaultNamespace : @namespace;
+    }
+
+    private static string BuildClientInitializationError()
+    {
+        return "Kubernetes клиент не инициализирован. Проверьте Kubernetes:KubeconfigPath или in-cluster окружение (KUBERNETES_SERVICE_HOST/KUBERNETES_SERVICE_PORT).";
+    }
+
+    private bool TryGetClient(out IKubernetes client, out string error)
+    {
+        if (_client is null)
+        {
+            client = null!;
+            var details = string.IsNullOrWhiteSpace(_clientInitializationError)
+                ? string.Empty
+                : $" Детали: {_clientInitializationError}";
+            error = BuildClientInitializationError() + details;
+            return false;
+        }
+
+        client = _client;
+        error = string.Empty;
+        return true;
+    }
+
+    private static string FormatError(string toolName, string @namespace, Exception exception, string? resourceName = null)
+    {
+        var resourcePart = string.IsNullOrWhiteSpace(resourceName) ? string.Empty : $", resource='{resourceName}'";
+
+        if (exception is HttpOperationException httpException)
+        {
+            var statusCode = httpException.Response?.StatusCode;
+            var reason = httpException.Response?.ReasonPhrase;
+            var body = string.IsNullOrWhiteSpace(httpException.Response?.Content)
+                ? "-"
+                : httpException.Response!.Content;
+
+            return $"Ошибка Kubernetes в tool '{toolName}' (namespace='{@namespace}'{resourcePart}): status={(int?)statusCode ?? 0} {reason}, details={body}";
+        }
+
+        return $"Ошибка Kubernetes в tool '{toolName}' (namespace='{@namespace}'{resourcePart}): {exception.GetType().Name}: {exception.Message}";
+    }
+}