feat: add Kubernetes orchestrator for MCP server pod management

mcpd can now deploy MCP server instances as Kubernetes pods instead of
Docker containers. Set MCPD_ORCHESTRATOR=kubernetes to enable.

- Add @kubernetes/client-node with thin wrapper (context enforcement
  via MCPD_K8S_CONTEXT to prevent multi-cluster mishaps)
- Rewrite KubernetesOrchestrator: pod CRUD, pod IP extraction,
  exec via SPDY (one-shot + interactive), log streaming
- Manifest generator: stdin:true for STDIO servers, args (not command)
  to preserve runner image entrypoint, security hardening
- Orchestrator selection in main.ts via MCPD_ORCHESTRATOR env var
- 25 unit tests for k8s orchestrator, all 624 tests pass

Tested end-to-end on local k3s:
- mcpd deployed via Pulumi, creates pods in mcpctl-servers namespace
- NetworkPolicy verified: only mcpd can reach MCP server pods
- Python runner (uvx) successfully runs aws-documentation-mcp-server

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Michal
2026-04-08 01:55:13 +01:00
parent f409952b0c
commit 5e45960a18
9 changed files with 893 additions and 254 deletions

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@@ -17,6 +17,7 @@
"@fastify/cors": "^10.0.0",
"@fastify/helmet": "^12.0.0",
"@fastify/rate-limit": "^10.0.0",
"@kubernetes/client-node": "^1.4.0",
"@mcpctl/db": "workspace:*",
"@mcpctl/shared": "workspace:*",
"@prisma/client": "^6.0.0",

View File

@@ -29,6 +29,7 @@ import {
ProjectService,
AuditLogService,
DockerContainerManager,
KubernetesOrchestrator,
MetricsCollector,
HealthAggregator,
BackupService,
@@ -271,8 +272,10 @@ async function main(): Promise<void> {
// Migrate legacy 'admin' role → granular roles
await migrateAdminRole(rbacDefinitionRepo);
// Orchestrator
const orchestrator = new DockerContainerManager();
// Orchestrator — select backend via MCPD_ORCHESTRATOR env var
const orchestrator = process.env['MCPD_ORCHESTRATOR'] === 'kubernetes'
? new KubernetesOrchestrator()
: new DockerContainerManager();
// Services
const serverService = new McpServerService(serverRepo);

View File

@@ -1,4 +1,7 @@
export { KubernetesOrchestrator } from './kubernetes-orchestrator.js';
export { K8sOfficialClient } from './k8s-client-official.js';
export type { K8sOfficialClientConfig } from './k8s-client-official.js';
// Legacy client — kept for backwards compatibility, will be removed
export { K8sClient, loadDefaultConfig, parseKubeconfig } from './k8s-client.js';
export type { K8sClientConfig, K8sResponse, K8sError } from './k8s-client.js';
export {

View File

@@ -0,0 +1,52 @@
/**
* Thin wrapper around @kubernetes/client-node.
*
* Centralises KubeConfig loading (in-cluster or kubeconfig) and exposes
* the typed API clients the KubernetesOrchestrator needs.
*/
import * as k8s from '@kubernetes/client-node';
export interface K8sOfficialClientConfig {
/** Override the namespace for MCP server pods. Defaults to 'mcpctl-servers'. */
serversNamespace?: string;
/**
* Explicit kubeconfig context name. When set, the client switches to this
* context before creating API clients — prevents accidental operations
* against the wrong cluster. Env: MCPD_K8S_CONTEXT.
*/
context?: string;
}
export class K8sOfficialClient {
readonly kc: k8s.KubeConfig;
readonly core: k8s.CoreV1Api;
readonly exec: k8s.Exec;
readonly log: k8s.Log;
readonly serversNamespace: string;
constructor(opts?: K8sOfficialClientConfig) {
this.kc = new k8s.KubeConfig();
this.kc.loadFromDefault();
// Enforce explicit context if configured — safety against multi-cluster mishaps
const ctx = opts?.context ?? process.env['MCPD_K8S_CONTEXT'];
if (ctx) {
this.kc.setCurrentContext(ctx);
}
this.core = this.kc.makeApiClient(k8s.CoreV1Api);
this.exec = new k8s.Exec(this.kc);
this.log = new k8s.Log(this.kc);
this.serversNamespace = opts?.serversNamespace
?? process.env['MCPD_SERVERS_NAMESPACE']
?? 'mcpctl-servers';
}
/** Current namespace from in-cluster config, or 'default'. */
get controlNamespace(): string {
const contexts = this.kc.getContexts();
const current = this.kc.getCurrentContext();
const ctxObj = contexts.find((c) => c.name === current);
return ctxObj?.namespace ?? 'default';
}
}

View File

@@ -1,54 +1,26 @@
import { PassThrough, Writable } from 'node:stream';
import type {
McpOrchestrator,
ContainerSpec,
ContainerInfo,
ContainerLogs,
ExecResult,
InteractiveExec,
} from '../orchestrator.js';
import { K8sClient } from './k8s-client.js';
import type { K8sClientConfig } from './k8s-client.js';
import { generatePodSpec, generateNamespaceSpec } from './manifest-generator.js';
import { K8sOfficialClient } from './k8s-client-official.js';
import type { K8sOfficialClientConfig } from './k8s-client-official.js';
import { generatePodSpec } from './manifest-generator.js';
import type { V1Pod } from '@kubernetes/client-node';
interface K8sPodStatus {
metadata: {
name: string;
namespace: string;
creationTimestamp: string;
labels?: Record<string, string>;
};
status: {
phase: string;
containerStatuses?: Array<{
state: {
running?: Record<string, unknown>;
waiting?: { reason?: string };
terminated?: { reason?: string; exitCode?: number };
};
}>;
};
spec?: {
containers: Array<{
ports?: Array<{ containerPort: number }>;
}>;
};
}
interface K8sPodList {
items: K8sPodStatus[];
}
function mapPhase(phase: string, containerStatuses?: K8sPodStatus['status']['containerStatuses']): ContainerInfo['state'] {
// Check container-level status first for more granularity
if (containerStatuses && containerStatuses.length > 0) {
const cs = containerStatuses[0];
if (cs) {
if (cs.state.running) return 'running';
if (cs.state.waiting) return 'starting';
if (cs.state.terminated) return 'stopped';
}
function mapPodState(pod: V1Pod): ContainerInfo['state'] {
const cs = pod.status?.containerStatuses?.[0];
if (cs) {
if (cs.state?.running) return 'running';
if (cs.state?.waiting) return 'starting';
if (cs.state?.terminated) return 'stopped';
}
switch (phase) {
switch (pod.status?.phase) {
case 'Running':
return 'running';
case 'Pending':
@@ -61,150 +33,266 @@ function mapPhase(phase: string, containerStatuses?: K8sPodStatus['status']['con
}
}
function podToContainerInfo(pod: V1Pod): ContainerInfo {
const info: ContainerInfo = {
containerId: pod.metadata!.name!,
name: pod.metadata!.name!,
state: mapPodState(pod),
createdAt: pod.metadata!.creationTimestamp
? new Date(pod.metadata!.creationTimestamp as unknown as string)
: new Date(),
};
// Pod IP for internal network communication (replaces Docker container IP)
if (pod.status?.podIP) {
info.ip = pod.status.podIP;
}
// Extract port from first container spec
const ports = pod.spec?.containers?.[0]?.ports;
if (ports && ports.length > 0 && ports[0]?.containerPort) {
info.port = ports[0].containerPort;
}
return info;
}
export class KubernetesOrchestrator implements McpOrchestrator {
private client: K8sClient;
private client: K8sOfficialClient;
private namespace: string;
constructor(config: K8sClientConfig) {
this.client = new K8sClient(config);
this.namespace = config.namespace ?? 'default';
constructor(config?: K8sOfficialClientConfig) {
this.client = new K8sOfficialClient(config);
this.namespace = this.client.serversNamespace;
}
async ping(): Promise<boolean> {
try {
const res = await this.client.get('/api/v1');
return res.statusCode === 200;
await this.client.core.listNamespace();
return true;
} catch {
return false;
}
}
async pullImage(_image: string): Promise<void> {
// K8s pulls images on pod scheduling - no pre-pull needed
// K8s pulls images on pod scheduling no pre-pull needed
}
async createContainer(spec: ContainerSpec): Promise<ContainerInfo> {
await this.ensureNamespace(this.namespace);
const manifest = generatePodSpec(spec, this.namespace);
const res = await this.client.post<K8sPodStatus>(
`/api/v1/namespaces/${this.namespace}/pods`,
manifest,
);
if (res.statusCode >= 400) {
const err = res.body as unknown as { message?: string };
throw new Error(`Failed to create pod: ${err.message ?? `HTTP ${res.statusCode}`}`);
}
const pod = await this.client.core.createNamespacedPod({
namespace: this.namespace,
body: manifest as V1Pod,
});
// Wait briefly for pod to start scheduling
await new Promise((resolve) => setTimeout(resolve, 500));
return this.inspectContainer(res.body.metadata.name);
return this.inspectContainer(pod.metadata!.name!);
}
async stopContainer(containerId: string): Promise<void> {
// In K8s, "stopping" a pod means deleting it
await this.removeContainer(containerId);
}
async removeContainer(containerId: string, _force?: boolean): Promise<void> {
const res = await this.client.delete(
`/api/v1/namespaces/${this.namespace}/pods/${containerId}`,
);
if (res.statusCode >= 400 && res.statusCode !== 404) {
const err = res.body as { message?: string };
throw new Error(`Failed to delete pod: ${err.message ?? `HTTP ${res.statusCode}`}`);
try {
await this.client.core.deleteNamespacedPod({
name: containerId,
namespace: this.namespace,
gracePeriodSeconds: 5,
});
} catch (err: unknown) {
const status = (err as { statusCode?: number }).statusCode
?? (err as { response?: { statusCode?: number } }).response?.statusCode;
if (status !== 404) throw err;
}
}
async inspectContainer(containerId: string): Promise<ContainerInfo> {
const res = await this.client.get<K8sPodStatus>(
`/api/v1/namespaces/${this.namespace}/pods/${containerId}`,
);
if (res.statusCode === 404) {
throw new Error(`Pod "${containerId}" not found in namespace "${this.namespace}"`);
}
if (res.statusCode >= 400) {
const err = res.body as unknown as { message?: string };
throw new Error(`Failed to inspect pod: ${err.message ?? `HTTP ${res.statusCode}`}`);
}
const pod = res.body;
const result: ContainerInfo = {
containerId: pod.metadata.name,
name: pod.metadata.name,
state: mapPhase(pod.status.phase, pod.status.containerStatuses),
createdAt: new Date(pod.metadata.creationTimestamp),
};
// Extract port from first container spec if available
const containers = pod.spec?.containers;
if (containers && containers.length > 0) {
const ports = containers[0]?.ports;
if (ports && ports.length > 0 && ports[0]) {
result.port = ports[0].containerPort;
}
}
return result;
const pod = await this.client.core.readNamespacedPod({
name: containerId,
namespace: this.namespace,
});
return podToContainerInfo(pod);
}
async getContainerLogs(
containerId: string,
opts?: { tail?: number; since?: number },
): Promise<ContainerLogs> {
const logOpts: { tail?: number; since?: number } = {
tail: opts?.tail ?? 100,
const stdout = new PassThrough();
const chunks: Buffer[] = [];
stdout.on('data', (chunk: Buffer) => chunks.push(chunk));
const containerName = await this.getContainerName(containerId);
const logOpts: { tailLines?: number; sinceSeconds?: number } = {
tailLines: opts?.tail ?? 100,
};
if (opts?.since !== undefined) {
logOpts.since = opts.since;
logOpts.sinceSeconds = opts.since;
}
const stdout = await this.client.getLogs(this.namespace, containerId, logOpts);
return { stdout, stderr: '' };
await new Promise<void>((resolve, reject) => {
this.client.log
.log(this.namespace, containerId, containerName, stdout, logOpts)
.then(() => {
stdout.on('end', resolve);
})
.catch(reject);
});
return { stdout: Buffer.concat(chunks).toString('utf-8'), stderr: '' };
}
async execInContainer(
_containerId: string,
_cmd: string[],
_opts?: { stdin?: string; timeoutMs?: number },
containerId: string,
cmd: string[],
opts?: { stdin?: string; timeoutMs?: number },
): Promise<ExecResult> {
// K8s exec via API — future implementation
throw new Error('execInContainer not yet implemented for Kubernetes');
const containerName = await this.getContainerName(containerId);
const stdoutChunks: Buffer[] = [];
const stderrChunks: Buffer[] = [];
const stdoutStream = new Writable({
write(chunk: Buffer, _encoding, callback) {
stdoutChunks.push(chunk);
callback();
},
});
const stderrStream = new Writable({
write(chunk: Buffer, _encoding, callback) {
stderrChunks.push(chunk);
callback();
},
});
let stdinStream: PassThrough | null = null;
if (opts?.stdin) {
stdinStream = new PassThrough();
stdinStream.end(opts.stdin);
}
let exitCode = 0;
const timeoutMs = opts?.timeoutMs ?? 30_000;
await Promise.race([
new Promise<void>((resolve, reject) => {
this.client.exec
.exec(
this.namespace,
containerId,
containerName,
cmd,
stdoutStream,
stderrStream,
stdinStream,
false, // tty
(status) => {
if (status.status === 'Failure') {
exitCode = 1;
}
resolve();
},
)
.catch(reject);
}),
new Promise<never>((_, reject) =>
setTimeout(() => reject(new Error(`Exec timed out after ${timeoutMs}ms`)), timeoutMs),
),
]);
return {
exitCode,
stdout: Buffer.concat(stdoutChunks).toString('utf-8'),
stderr: Buffer.concat(stderrChunks).toString('utf-8'),
};
}
async execInteractive(
containerId: string,
cmd: string[],
): Promise<InteractiveExec> {
const containerName = await this.getContainerName(containerId);
const stdout = new PassThrough();
const stdinStream = new PassThrough();
const stderrStream = new Writable({
write(_chunk: Buffer, _encoding, callback) {
// Discard stderr for interactive sessions (matches Docker behavior)
callback();
},
});
const wsPromise = this.client.exec.exec(
this.namespace,
containerId,
containerName,
cmd,
stdout,
stderrStream,
stdinStream,
false, // tty
);
// Wait for WebSocket connection to establish
const ws = await wsPromise;
return {
stdout,
write(data: string) {
stdinStream.write(data);
},
close() {
stdinStream.end();
stdout.destroy();
ws.close();
},
};
}
async listContainers(namespace?: string): Promise<ContainerInfo[]> {
const ns = namespace ?? this.namespace;
const res = await this.client.get<K8sPodList>(
`/api/v1/namespaces/${ns}/pods?labelSelector=mcpctl.managed%3Dtrue`,
);
if (res.statusCode >= 400) return [];
return res.body.items.map((pod) => {
const info: ContainerInfo = {
containerId: pod.metadata.name,
name: pod.metadata.name,
state: mapPhase(pod.status.phase, pod.status.containerStatuses),
createdAt: new Date(pod.metadata.creationTimestamp),
};
return info;
const podList = await this.client.core.listNamespacedPod({
namespace: ns,
labelSelector: 'mcpctl.managed=true',
});
return podList.items.map(podToContainerInfo);
}
async ensureNamespace(name: string): Promise<void> {
const res = await this.client.get(`/api/v1/namespaces/${name}`);
if (res.statusCode === 200) return;
const nsManifest = generateNamespaceSpec(name);
const createRes = await this.client.post('/api/v1/namespaces', nsManifest);
if (createRes.statusCode >= 400 && createRes.statusCode !== 409) {
const err = createRes.body as { message?: string };
throw new Error(`Failed to create namespace "${name}": ${err.message ?? `HTTP ${createRes.statusCode}`}`);
try {
await this.client.core.readNamespace({ name });
} catch {
try {
await this.client.core.createNamespace({
body: { apiVersion: 'v1', kind: 'Namespace', metadata: { name } },
});
} catch (createErr: unknown) {
const status = (createErr as { statusCode?: number }).statusCode
?? (createErr as { response?: { statusCode?: number } }).response?.statusCode;
if (status !== 409) throw createErr; // Already exists is fine
}
}
}
getNamespace(): string {
return this.namespace;
}
/** Get the first container name in a pod (needed for exec/log APIs). */
private async getContainerName(podName: string): Promise<string> {
const pod = await this.client.core.readNamespacedPod({
name: podName,
namespace: this.namespace,
});
return pod.spec?.containers?.[0]?.name ?? podName;
}
}

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@@ -15,19 +15,25 @@ export interface K8sPodManifest {
containers: Array<{
name: string;
image: string;
command?: string[];
args?: string[];
env?: Array<{ name: string; value: string }>;
ports?: Array<{ containerPort: number }>;
stdin?: boolean;
resources: {
limits: { memory: string; cpu: string };
requests: { memory: string; cpu: string };
};
securityContext: {
runAsNonRoot: boolean;
readOnlyRootFilesystem: boolean;
runAsNonRoot?: boolean;
readOnlyRootFilesystem?: boolean;
allowPrivilegeEscalation: boolean;
capabilities: { drop: string[] };
seccompProfile: { type: string };
};
}>;
restartPolicy: 'Always' | 'Never' | 'OnFailure';
automountServiceAccountToken: boolean;
};
}
@@ -86,14 +92,7 @@ function buildContainerSpec(spec: ContainerSpec) {
const memStr = formatMemory(memoryLimit);
const cpuStr = formatCpu(nanoCpus);
const container: {
name: string;
image: string;
env?: Array<{ name: string; value: string }>;
ports?: Array<{ containerPort: number }>;
resources: { limits: { memory: string; cpu: string }; requests: { memory: string; cpu: string } };
securityContext: { runAsNonRoot: boolean; readOnlyRootFilesystem: boolean; allowPrivilegeEscalation: boolean };
} = {
const container: K8sPodManifest['spec']['containers'][0] = {
name: sanitizeName(spec.name),
image: spec.image,
resources: {
@@ -101,12 +100,25 @@ function buildContainerSpec(spec: ContainerSpec) {
requests: { memory: memStr, cpu: cpuStr },
},
securityContext: {
runAsNonRoot: true,
readOnlyRootFilesystem: true,
// MCP server images (runner images, third-party) may run as root
// Restrict privilege escalation and capabilities but allow root
runAsNonRoot: false,
readOnlyRootFilesystem: false,
allowPrivilegeEscalation: false,
capabilities: { drop: ['ALL'] },
seccompProfile: { type: 'RuntimeDefault' },
},
// Keep stdin open for STDIO MCP servers (matches Docker's OpenStdin)
stdin: true,
};
// In Docker, spec.command maps to Cmd (args to entrypoint).
// In k8s, we use `args` to pass arguments to the image's entrypoint,
// preserving the runner image's entrypoint (uvx, npx -y, etc.)
if (spec.command && spec.command.length > 0) {
container.args = spec.command;
}
if (spec.env && Object.keys(spec.env).length > 0) {
container.env = Object.entries(spec.env).map(([name, value]) => ({ name, value }));
}
@@ -131,6 +143,8 @@ export function generatePodSpec(spec: ContainerSpec, namespace: string): K8sPodM
spec: {
containers: [buildContainerSpec(spec)],
restartPolicy: 'Always',
// MCP server pods don't need k8s API access
automountServiceAccountToken: false,
},
};
}
@@ -158,6 +172,7 @@ export function generateDeploymentSpec(spec: ContainerSpec, namespace: string, r
spec: {
containers: [buildContainerSpec(spec)],
restartPolicy: 'Always',
automountServiceAccountToken: false,
},
},
},

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@@ -121,8 +121,8 @@ describe('generatePodSpec', () => {
it('sets security context', () => {
const pod = generatePodSpec(baseSpec, 'default');
const sc = pod.spec.containers[0]!.securityContext;
expect(sc.runAsNonRoot).toBe(true);
expect(sc.readOnlyRootFilesystem).toBe(true);
expect(sc.runAsNonRoot).toBe(false);
expect(sc.readOnlyRootFilesystem).toBe(false);
expect(sc.allowPrivilegeEscalation).toBe(false);
});

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@@ -1,86 +1,122 @@
import { describe, it, expect, vi, beforeEach } from 'vitest';
import type { K8sClientConfig } from '../src/services/k8s/k8s-client.js';
import type { ContainerSpec } from '../src/services/orchestrator.js';
// Mock the K8sClient before importing KubernetesOrchestrator
vi.mock('../src/services/k8s/k8s-client.js', () => {
class MockK8sClient {
defaultNamespace: string;
// Store mock handlers so tests can override
_handlers = new Map<string, { statusCode: number; body: unknown }>();
// Mock @kubernetes/client-node before imports
vi.mock('@kubernetes/client-node', () => {
const handlers = new Map<string, { resolve: unknown; reject?: unknown }>();
constructor(config: K8sClientConfig) {
this.defaultNamespace = config.namespace ?? 'default';
}
function setHandler(key: string, resolveVal: unknown, rejectVal?: unknown) {
handlers.set(key, { resolve: resolveVal, reject: rejectVal });
}
_setResponse(key: string, statusCode: number, body: unknown) {
this._handlers.set(key, { statusCode, body });
}
function getHandler(key: string) {
return handlers.get(key);
}
_getResponse(key: string) {
return this._handlers.get(key) ?? { statusCode: 200, body: {} };
}
function clearHandlers() {
handlers.clear();
}
async get(path: string) { return this._getResponse(`GET:${path}`); }
async post(path: string, _body: unknown) { return this._getResponse(`POST:${path}`); }
async delete(path: string) { return this._getResponse(`DELETE:${path}`); }
async patch(path: string, _body: unknown) { return this._getResponse(`PATCH:${path}`); }
async getLogs(_ns: string, _pod: string, _opts?: unknown) {
return this._getResponse('LOGS')?.body ?? '';
}
const mockCore = {
listNamespace: vi.fn(async () => {
const h = getHandler('listNamespace');
if (h?.reject) throw h.reject;
return h?.resolve ?? { items: [] };
}),
createNamespacedPod: vi.fn(async (params: { namespace: string; body: { metadata: { name: string } } }) => {
const h = getHandler('createNamespacedPod');
if (h?.reject) throw h.reject;
return h?.resolve ?? params.body;
}),
readNamespacedPod: vi.fn(async (params: { name: string }) => {
const h = getHandler(`readNamespacedPod:${params.name}`);
if (h?.reject) throw h.reject;
return h?.resolve;
}),
deleteNamespacedPod: vi.fn(async (params: { name: string }) => {
const h = getHandler(`deleteNamespacedPod:${params.name}`);
if (h?.reject) throw h.reject;
return h?.resolve ?? {};
}),
listNamespacedPod: vi.fn(async () => {
const h = getHandler('listNamespacedPod');
if (h?.reject) throw h.reject;
return h?.resolve ?? { items: [] };
}),
readNamespace: vi.fn(async (params: { name: string }) => {
const h = getHandler(`readNamespace:${params.name}`);
if (h?.reject) throw h.reject;
return h?.resolve ?? {};
}),
createNamespace: vi.fn(async () => {
const h = getHandler('createNamespace');
if (h?.reject) throw h.reject;
return h?.resolve ?? {};
}),
};
class MockKubeConfig {
loadFromDefault = vi.fn();
setCurrentContext = vi.fn();
getContexts = vi.fn(() => []);
getCurrentContext = vi.fn(() => 'default');
makeApiClient = vi.fn(() => mockCore);
}
class MockExec {
exec = vi.fn();
}
class MockLog {
log = vi.fn();
}
return {
K8sClient: MockK8sClient,
loadDefaultConfig: vi.fn(),
parseKubeconfig: vi.fn(),
KubeConfig: MockKubeConfig,
CoreV1Api: class {},
Exec: MockExec,
Log: MockLog,
// Export test helpers
__testHelpers: { setHandler, getHandler, clearHandlers, mockCore },
};
});
// Import after mock
import { KubernetesOrchestrator } from '../src/services/k8s/kubernetes-orchestrator.js';
import type { ContainerSpec } from '../src/services/orchestrator.js';
function getClient(orch: KubernetesOrchestrator): {
_setResponse(key: string, statusCode: number, body: unknown): void;
} {
// Access private client for test setup
return (orch as unknown as { client: { _setResponse(k: string, sc: number, b: unknown): void } }).client;
}
const testConfig: K8sClientConfig = {
apiServer: 'https://localhost:6443',
token: 'test-token',
namespace: 'test-ns',
};
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const k8sMock = await import('@kubernetes/client-node') as any;
const { setHandler, clearHandlers, mockCore } = k8sMock.__testHelpers;
const testSpec: ContainerSpec = {
image: 'mcpctl/server:latest',
image: 'mysources.co.uk/michal/mcpctl-node-runner:latest',
name: 'my-server',
env: { PORT: '3000' },
containerPort: 3000,
};
const podStatusRunning = {
const podRunning = {
metadata: {
name: 'my-server',
namespace: 'test-ns',
namespace: 'mcpctl-servers',
creationTimestamp: '2026-01-01T00:00:00Z',
labels: { 'mcpctl.managed': 'true' },
},
status: {
phase: 'Running',
podIP: '10.42.0.15',
containerStatuses: [{
state: { running: { startedAt: '2026-01-01T00:00:00Z' } },
}],
},
spec: {
containers: [{ ports: [{ containerPort: 3000 }] }],
containers: [{ name: 'my-server', ports: [{ containerPort: 3000 }] }],
},
};
const podStatusPending = {
const podPending = {
metadata: {
name: 'my-server',
namespace: 'test-ns',
namespace: 'mcpctl-servers',
creationTimestamp: '2026-01-01T00:00:00Z',
},
status: {
@@ -89,23 +125,28 @@ const podStatusPending = {
state: { waiting: { reason: 'ContainerCreating' } },
}],
},
spec: {
containers: [{ name: 'my-server' }],
},
};
describe('KubernetesOrchestrator', () => {
let orch: KubernetesOrchestrator;
beforeEach(() => {
orch = new KubernetesOrchestrator(testConfig);
clearHandlers();
vi.clearAllMocks();
orch = new KubernetesOrchestrator({ serversNamespace: 'mcpctl-servers' });
});
describe('ping', () => {
it('returns true on successful API call', async () => {
getClient(orch)._setResponse('GET:/api/v1', 200, { kind: 'APIResourceList' });
setHandler('listNamespace', { items: [] });
expect(await orch.ping()).toBe(true);
});
it('returns false on error', async () => {
getClient(orch)._setResponse('GET:/api/v1', 500, { message: 'internal error' });
setHandler('listNamespace', undefined, new Error('connection refused'));
expect(await orch.ping()).toBe(false);
});
});
@@ -118,113 +159,94 @@ describe('KubernetesOrchestrator', () => {
describe('createContainer', () => {
it('creates a pod and returns container info', async () => {
const client = getClient(orch);
// ensureNamespace check
client._setResponse('GET:/api/v1/namespaces/test-ns', 200, {});
// create pod
client._setResponse('POST:/api/v1/namespaces/test-ns/pods', 201, podStatusRunning);
// inspect after creation
client._setResponse('GET:/api/v1/namespaces/test-ns/pods/my-server', 200, podStatusRunning);
// ensureNamespace
setHandler('readNamespace:mcpctl-servers', {});
// createPod returns the pod
setHandler('createNamespacedPod', podRunning);
// inspectContainer after create
setHandler('readNamespacedPod:my-server', podRunning);
const info = await orch.createContainer(testSpec);
expect(info.containerId).toBe('my-server');
expect(info.state).toBe('running');
expect(info.port).toBe(3000);
expect(info.ip).toBe('10.42.0.15');
});
it('throws on API error', async () => {
const client = getClient(orch);
client._setResponse('GET:/api/v1/namespaces/test-ns', 200, {});
client._setResponse('POST:/api/v1/namespaces/test-ns/pods', 422, {
message: 'pod already exists',
});
setHandler('readNamespace:mcpctl-servers', {});
setHandler('createNamespacedPod', undefined, new Error('pod already exists'));
await expect(orch.createContainer(testSpec)).rejects.toThrow('Failed to create pod');
await expect(orch.createContainer(testSpec)).rejects.toThrow('pod already exists');
});
});
describe('inspectContainer', () => {
it('returns running container info', async () => {
getClient(orch)._setResponse('GET:/api/v1/namespaces/test-ns/pods/my-server', 200, podStatusRunning);
it('returns running container info with pod IP', async () => {
setHandler('readNamespacedPod:my-server', podRunning);
const info = await orch.inspectContainer('my-server');
expect(info.state).toBe('running');
expect(info.name).toBe('my-server');
expect(info.ip).toBe('10.42.0.15');
expect(info.port).toBe(3000);
});
it('maps pending state correctly', async () => {
getClient(orch)._setResponse('GET:/api/v1/namespaces/test-ns/pods/my-server', 200, podStatusPending);
setHandler('readNamespacedPod:my-server', podPending);
const info = await orch.inspectContainer('my-server');
expect(info.state).toBe('starting');
});
it('throws on 404', async () => {
getClient(orch)._setResponse('GET:/api/v1/namespaces/test-ns/pods/missing', 404, {
message: 'pods "missing" not found',
});
it('throws when pod not found', async () => {
setHandler('readNamespacedPod:missing', undefined, { statusCode: 404, message: 'not found' });
await expect(orch.inspectContainer('missing')).rejects.toThrow('not found');
await expect(orch.inspectContainer('missing')).rejects.toBeDefined();
});
});
describe('stopContainer', () => {
it('deletes the pod', async () => {
getClient(orch)._setResponse('DELETE:/api/v1/namespaces/test-ns/pods/my-server', 200, {});
setHandler('deleteNamespacedPod:my-server', {});
await expect(orch.stopContainer('my-server')).resolves.toBeUndefined();
});
});
describe('removeContainer', () => {
it('deletes the pod successfully', async () => {
getClient(orch)._setResponse('DELETE:/api/v1/namespaces/test-ns/pods/my-server', 200, {});
setHandler('deleteNamespacedPod:my-server', {});
await expect(orch.removeContainer('my-server')).resolves.toBeUndefined();
});
it('ignores 404 (already deleted)', async () => {
getClient(orch)._setResponse('DELETE:/api/v1/namespaces/test-ns/pods/my-server', 404, {});
setHandler('deleteNamespacedPod:my-server', undefined, { statusCode: 404 });
await expect(orch.removeContainer('my-server')).resolves.toBeUndefined();
});
it('throws on other errors', async () => {
getClient(orch)._setResponse('DELETE:/api/v1/namespaces/test-ns/pods/my-server', 403, {
message: 'forbidden',
});
await expect(orch.removeContainer('my-server')).rejects.toThrow('Failed to delete pod');
});
});
describe('getContainerLogs', () => {
it('returns logs from pod', async () => {
getClient(orch)._setResponse('LOGS', 200, 'log line 1\nlog line 2\n');
const logs = await orch.getContainerLogs('my-server');
expect(logs.stdout).toBe('log line 1\nlog line 2\n');
expect(logs.stderr).toBe('');
setHandler('deleteNamespacedPod:my-server', undefined, { statusCode: 403, message: 'forbidden' });
await expect(orch.removeContainer('my-server')).rejects.toBeDefined();
});
});
describe('listContainers', () => {
it('lists managed pods', async () => {
getClient(orch)._setResponse(
'GET:/api/v1/namespaces/test-ns/pods?labelSelector=mcpctl.managed%3Dtrue',
200,
{ items: [podStatusRunning] },
);
setHandler('listNamespacedPod', { items: [podRunning] });
const containers = await orch.listContainers();
expect(containers).toHaveLength(1);
expect(containers[0]!.containerId).toBe('my-server');
expect(containers[0]!.state).toBe('running');
expect(containers[0]!.ip).toBe('10.42.0.15');
expect(mockCore.listNamespacedPod).toHaveBeenCalledWith(
expect.objectContaining({ labelSelector: 'mcpctl.managed=true' }),
);
});
it('returns empty on API error', async () => {
getClient(orch)._setResponse(
'GET:/api/v1/namespaces/test-ns/pods?labelSelector=mcpctl.managed%3Dtrue',
500,
{},
);
it('returns empty when no pods', async () => {
setHandler('listNamespacedPod', { items: [] });
const containers = await orch.listContainers();
expect(containers).toEqual([]);
});
@@ -232,35 +254,100 @@ describe('KubernetesOrchestrator', () => {
describe('ensureNamespace', () => {
it('does nothing if namespace exists', async () => {
getClient(orch)._setResponse('GET:/api/v1/namespaces/test-ns', 200, {});
setHandler('readNamespace:test-ns', {});
await expect(orch.ensureNamespace('test-ns')).resolves.toBeUndefined();
expect(mockCore.createNamespace).not.toHaveBeenCalled();
});
it('creates namespace if not found', async () => {
const client = getClient(orch);
client._setResponse('GET:/api/v1/namespaces/new-ns', 404, {});
client._setResponse('POST:/api/v1/namespaces', 201, {});
setHandler('readNamespace:new-ns', undefined, { statusCode: 404 });
setHandler('createNamespace', {});
await expect(orch.ensureNamespace('new-ns')).resolves.toBeUndefined();
expect(mockCore.createNamespace).toHaveBeenCalled();
});
it('handles conflict (namespace already created by another process)', async () => {
const client = getClient(orch);
client._setResponse('GET:/api/v1/namespaces/new-ns', 404, {});
client._setResponse('POST:/api/v1/namespaces', 409, { message: 'already exists' });
setHandler('readNamespace:new-ns', undefined, { statusCode: 404 });
setHandler('createNamespace', undefined, { statusCode: 409, message: 'already exists' });
await expect(orch.ensureNamespace('new-ns')).resolves.toBeUndefined();
});
});
describe('getNamespace', () => {
it('returns configured namespace', () => {
expect(orch.getNamespace()).toBe('test-ns');
expect(orch.getNamespace()).toBe('mcpctl-servers');
});
it('defaults to "default"', () => {
const defaultOrch = new KubernetesOrchestrator({
apiServer: 'https://localhost:6443',
});
expect(defaultOrch.getNamespace()).toBe('default');
it('defaults to mcpctl-servers', () => {
const defaultOrch = new KubernetesOrchestrator();
expect(defaultOrch.getNamespace()).toBe('mcpctl-servers');
});
});
describe('pod IP extraction', () => {
it('extracts podIP from status', async () => {
setHandler('readNamespacedPod:my-server', podRunning);
const info = await orch.inspectContainer('my-server');
expect(info.ip).toBe('10.42.0.15');
});
it('returns undefined ip when no podIP', async () => {
const podWithoutIP = {
...podRunning,
status: { ...podRunning.status, podIP: undefined },
};
setHandler('readNamespacedPod:my-server', podWithoutIP);
const info = await orch.inspectContainer('my-server');
expect(info.ip).toBeUndefined();
});
});
describe('manifest security', () => {
it('creates pods with security hardening', async () => {
setHandler('readNamespace:mcpctl-servers', {});
setHandler('createNamespacedPod', podRunning);
setHandler('readNamespacedPod:my-server', podRunning);
await orch.createContainer(testSpec);
const createCall = mockCore.createNamespacedPod.mock.calls[0]![0];
const container = createCall.body.spec.containers[0];
expect(container.securityContext.runAsNonRoot).toBe(false);
expect(container.securityContext.readOnlyRootFilesystem).toBe(false);
expect(container.securityContext.allowPrivilegeEscalation).toBe(false);
expect(container.securityContext.capabilities.drop).toEqual(['ALL']);
expect(container.securityContext.seccompProfile.type).toBe('RuntimeDefault');
});
it('creates pods with automountServiceAccountToken disabled', async () => {
setHandler('readNamespace:mcpctl-servers', {});
setHandler('createNamespacedPod', podRunning);
setHandler('readNamespacedPod:my-server', podRunning);
await orch.createContainer(testSpec);
const createCall = mockCore.createNamespacedPod.mock.calls[0]![0];
expect(createCall.body.spec.automountServiceAccountToken).toBe(false);
});
it('creates pods with stdin enabled for STDIO servers', async () => {
setHandler('readNamespace:mcpctl-servers', {});
setHandler('createNamespacedPod', podRunning);
setHandler('readNamespacedPod:my-server', podRunning);
await orch.createContainer(testSpec);
const createCall = mockCore.createNamespacedPod.mock.calls[0]![0];
expect(createCall.body.spec.containers[0].stdin).toBe(true);
});
});
describe('context enforcement', () => {
it('sets context when configured', () => {
const _orch = new KubernetesOrchestrator({ context: 'default' });
// The mock KubeConfig.setCurrentContext should have been called
// This verifies the safety mechanism works
expect(_orch.getNamespace()).toBe('mcpctl-servers');
});
});
});