feat(routing): Lab Host Router closes the Gateway-to-Lab cross-VM gap
Adds platform/lab-router/ — a narrow service that runs on the Lab Host, authenticates the Gateway via mTLS, and resolves an opaque routing token to a local container purely from Docker label state (no Postgres access, no callback to the Provisioner). Replaces the Gateway's env.internal_ip assumption (only valid when Gateway and Lab share a Docker daemon) with a data-driven direct/router decision per lab_host (lab_hosts.routing_mode/router_endpoint, migration 004), resolved in one place (platform/gateway/src/lab-endpoint.js's labTarget()) that every proxy/fetch call site in server.js now goes through. Extends the existing Docker TLS CA (infra/scripts/docker-tls/generate-docker-tls.sh) with a second mTLS leaf pair (router-server/gateway-client) for this new data-plane connection, deployed by the docker-tls Ansible role into a separate directory from the control-plane pair. Firewall (rn-lab-host-01.rules) replaces the old speculative wide port-range allowance with one narrow rule: platform_ip -> the Router's port only. dev-local stays routing_mode: direct — zero behavior change for local dev, confirmed by the full existing regression suite passing unmodified.
This commit is contained in:
@@ -0,0 +1,7 @@
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FROM node:20-slim
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WORKDIR /app
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COPY package.json ./
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RUN npm install --production
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COPY src/ ./src/
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EXPOSE 8443
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CMD ["node", "src/server.js"]
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Generated
+706
@@ -0,0 +1,706 @@
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"integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw=="
|
||||
},
|
||||
"node_modules/uuid": {
|
||||
"version": "10.0.0",
|
||||
"resolved": "https://registry.npmjs.org/uuid/-/uuid-10.0.0.tgz",
|
||||
"integrity": "sha512-8XkAphELsDnEGrDxUOHB3RGvXz6TeuYSGEZBOjtTtPm2lwhGBjLgOzLHB63IUWfBpNucQjND6d3AOudO+H3RWQ==",
|
||||
"deprecated": "uuid@10 and below is no longer supported. For ESM codebases, update to uuid@latest. For CommonJS codebases, use uuid@11 (but be aware this version will likely be deprecated in 2028).",
|
||||
"funding": [
|
||||
"https://github.com/sponsors/broofa",
|
||||
"https://github.com/sponsors/ctavan"
|
||||
],
|
||||
"bin": {
|
||||
"uuid": "dist/bin/uuid"
|
||||
}
|
||||
},
|
||||
"node_modules/wrap-ansi": {
|
||||
"version": "7.0.0",
|
||||
"resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
|
||||
"integrity": "sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==",
|
||||
"dependencies": {
|
||||
"ansi-styles": "^4.0.0",
|
||||
"string-width": "^4.1.0",
|
||||
"strip-ansi": "^6.0.0"
|
||||
},
|
||||
"engines": {
|
||||
"node": ">=10"
|
||||
},
|
||||
"funding": {
|
||||
"url": "https://github.com/chalk/wrap-ansi?sponsor=1"
|
||||
}
|
||||
},
|
||||
"node_modules/wrappy": {
|
||||
"version": "1.0.2",
|
||||
"resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
|
||||
"integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="
|
||||
},
|
||||
"node_modules/y18n": {
|
||||
"version": "5.0.8",
|
||||
"resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz",
|
||||
"integrity": "sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==",
|
||||
"engines": {
|
||||
"node": ">=10"
|
||||
}
|
||||
},
|
||||
"node_modules/yargs": {
|
||||
"version": "17.7.3",
|
||||
"resolved": "https://registry.npmjs.org/yargs/-/yargs-17.7.3.tgz",
|
||||
"integrity": "sha512-GZtjxm/J/4TSxuL3FNYjCmLktBTnIw/rVmKSIyKeYAZpmJB2ig9VauCC5xsa82GNKVKDAqpOn3KVzNt0zmrU0g==",
|
||||
"dependencies": {
|
||||
"cliui": "^8.0.1",
|
||||
"escalade": "^3.1.1",
|
||||
"get-caller-file": "^2.0.5",
|
||||
"require-directory": "^2.1.1",
|
||||
"string-width": "^4.2.3",
|
||||
"y18n": "^5.0.5",
|
||||
"yargs-parser": "^21.1.1"
|
||||
},
|
||||
"engines": {
|
||||
"node": ">=12"
|
||||
}
|
||||
},
|
||||
"node_modules/yargs-parser": {
|
||||
"version": "21.1.1",
|
||||
"resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-21.1.1.tgz",
|
||||
"integrity": "sha512-tVpsJW7DdjecAiFpbIB1e3qxIQsE6NoPc5/eTdrbbIC4h0LVsWhnoa3g+m2HclBIujHzsxZ4VJVA+GUuc2/LBw==",
|
||||
"engines": {
|
||||
"node": ">=12"
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,15 @@
|
||||
{
|
||||
"name": "rootnode-lab-router",
|
||||
"version": "0.1.0",
|
||||
"description": "RootNode Academy Phase 4.1 — Lab Host Router. Runs on the same Docker host as student Labs; resolves an opaque routing token to a local container and reverse-proxies the Platform Gateway's data-plane traffic to it. See docs/PHASE4_1_PREPRODUCTION_HARDENING.md §1-3.",
|
||||
"private": true,
|
||||
"main": "src/server.js",
|
||||
"scripts": {
|
||||
"start": "node src/server.js",
|
||||
"test": "node test/run.js"
|
||||
},
|
||||
"dependencies": {
|
||||
"dockerode": "^4.0.2",
|
||||
"http-proxy": "^1.18.1"
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,29 @@
|
||||
// Token -> local container resolution, split out from server.js so it can be unit-tested
|
||||
// against a real (or fake) Docker client without needing TLS material or a bound port.
|
||||
// See server.js's header comment for the full design rationale.
|
||||
|
||||
const ROUTING_TOKEN_LABEL = 'rootnode.routing-token';
|
||||
|
||||
function tokenFingerprint(token) {
|
||||
return token ? `${token.slice(0, 6)}…(${token.length})` : '(none)';
|
||||
}
|
||||
|
||||
// Resolves a routing token to a live local container's reachable base URL, purely from local
|
||||
// Docker state — no Postgres, no Provisioner call. Returns null for "no such token" AND "token
|
||||
// belonged to a destroyed/replaced container" — both cases the caller treats identically (404).
|
||||
async function resolveTarget(docker, token) {
|
||||
if (!token || typeof token !== 'string' || token.length < 16) return null; // reject garbage before even hitting Docker
|
||||
const containers = await docker.listContainers({
|
||||
filters: JSON.stringify({ label: [`${ROUTING_TOKEN_LABEL}=${token}`], status: ['running'] }),
|
||||
});
|
||||
if (containers.length !== 1) return null; // 0 = unknown/destroyed; >1 should never happen (label is per-env-unique) but fail closed either way
|
||||
const info = containers[0];
|
||||
const networks = info.NetworkSettings && info.NetworkSettings.Networks;
|
||||
if (!networks) return null;
|
||||
const netName = Object.keys(networks)[0];
|
||||
const ip = netName && networks[netName].IPAddress;
|
||||
if (!ip) return null;
|
||||
return `http://${ip}:80`; // every Lab container listens on 80 internally — see docs/LAB_ARCHITECTURE.md
|
||||
}
|
||||
|
||||
module.exports = { resolveTarget, tokenFingerprint, ROUTING_TOKEN_LABEL };
|
||||
@@ -0,0 +1,103 @@
|
||||
// RootNode Academy — Lab Host Router (Phase 4.1).
|
||||
//
|
||||
// Runs on the SAME Docker host as student Labs (rn-lab-host-01 in production). Its only job:
|
||||
// take a request from the Platform Gateway carrying an opaque routing token, find the ONE
|
||||
// local container labeled with that token, and reverse-proxy the request to it. See
|
||||
// docs/PHASE4_1_PREPRODUCTION_HARDENING.md §1-3 and docs/PRODUCTION_NETWORK_SECURITY.md.
|
||||
//
|
||||
// Deliberately narrow:
|
||||
// - Never talks to Postgres, the Provisioner, or anything off this host — it resolves purely
|
||||
// from local `docker ps` state (containers are labeled by the Provisioner at creation time,
|
||||
// see provisioner lifecycle.js), so a destroyed/reset environment's old token simply has no
|
||||
// matching container anymore. No separate "is this token still valid" check is needed.
|
||||
// - Only one route exists: proxy-by-token. No container listing, no Docker-API passthrough,
|
||||
// no endpoint that echoes back a container id, IP, or network name to the caller.
|
||||
// - Requires mTLS — the Node https server itself rejects any connection that doesn't present
|
||||
// a certificate signed by the configured CA (requestCert + rejectUnauthorized), so an
|
||||
// unauthenticated caller never reaches route-resolution logic at all. This is the ONLY
|
||||
// authentication; there is no bearer-token/API-key fallback (mTLS or nothing).
|
||||
// - Binds to an internal address only — this process has no idea what "public" means, that's
|
||||
// enforced by the firewall (infra/firewall/rn-lab-host-01.rules) and by never being given a
|
||||
// public-facing port mapping in the production Compose file. Defense in depth: even if the
|
||||
// firewall were misconfigured, mTLS still blocks anyone without the Gateway's client cert.
|
||||
|
||||
const fs = require('fs');
|
||||
const https = require('https');
|
||||
const httpProxy = require('http-proxy');
|
||||
const Docker = require('dockerode');
|
||||
const { resolveTarget, tokenFingerprint } = require('./resolve');
|
||||
|
||||
const PORT = Number(process.env.LAB_ROUTER_PORT) || 8443;
|
||||
const TLS_CA = process.env.LAB_ROUTER_TLS_CA;
|
||||
const TLS_CERT = process.env.LAB_ROUTER_TLS_CERT;
|
||||
const TLS_KEY = process.env.LAB_ROUTER_TLS_KEY;
|
||||
const ROUTE_TOKEN_HEADER = 'x-rootnode-route-token';
|
||||
|
||||
if (!TLS_CA || !TLS_CERT || !TLS_KEY) {
|
||||
console.error('FATAL: LAB_ROUTER_TLS_CA/CERT/KEY are not set. Refusing to start an unauthenticated Lab Host Router.');
|
||||
process.exit(1);
|
||||
}
|
||||
|
||||
// Always the local socket — the Router only ever inspects containers on ITS OWN host, never a
|
||||
// remote Docker daemon (that's the Provisioner's job, over a completely separate mTLS
|
||||
// connection — see docs/PHASE4_1_PREPRODUCTION_HARDENING.md §10 "control plane vs data plane").
|
||||
const docker = new Docker({ socketPath: process.env.DOCKER_SOCKET || '/var/run/docker.sock' });
|
||||
|
||||
const proxy = httpProxy.createProxyServer({ ws: true });
|
||||
proxy.on('error', (err, req, res) => {
|
||||
console.error('[lab-router] proxy error:', err.message);
|
||||
if (res && res.writeHead && !res.headersSent) {
|
||||
res.writeHead(502, { 'Content-Type': 'application/json' });
|
||||
res.end(JSON.stringify({ error: 'lab_unreachable' }));
|
||||
} else if (res && res.destroy) {
|
||||
res.destroy();
|
||||
}
|
||||
});
|
||||
|
||||
async function handleRequest(req, res) {
|
||||
const token = req.headers[ROUTE_TOKEN_HEADER];
|
||||
let target;
|
||||
try {
|
||||
target = await resolveTarget(docker, token);
|
||||
} catch (e) {
|
||||
console.error('[lab-router] docker lookup failed:', e.message);
|
||||
res.writeHead(502, { 'Content-Type': 'application/json' });
|
||||
return res.end(JSON.stringify({ error: 'router_internal_error' }));
|
||||
}
|
||||
if (!target) {
|
||||
console.log(`[lab-router] unknown/stale token ${tokenFingerprint(token)} -> 404`);
|
||||
res.writeHead(404, { 'Content-Type': 'application/json' });
|
||||
return res.end(JSON.stringify({ error: 'unknown_environment' }));
|
||||
}
|
||||
proxy.web(req, res, { target });
|
||||
}
|
||||
|
||||
async function handleUpgrade(req, socket, head) {
|
||||
const token = req.headers[ROUTE_TOKEN_HEADER];
|
||||
let target;
|
||||
try {
|
||||
target = await resolveTarget(docker, token);
|
||||
} catch (e) {
|
||||
console.error('[lab-router] docker lookup failed (ws):', e.message);
|
||||
return socket.destroy();
|
||||
}
|
||||
if (!target) {
|
||||
console.log(`[lab-router] unknown/stale token ${tokenFingerprint(token)} -> ws rejected`);
|
||||
return socket.destroy();
|
||||
}
|
||||
proxy.ws(req, socket, head, { target });
|
||||
}
|
||||
|
||||
const tlsOptions = {
|
||||
ca: fs.readFileSync(TLS_CA),
|
||||
cert: fs.readFileSync(TLS_CERT),
|
||||
key: fs.readFileSync(TLS_KEY),
|
||||
requestCert: true,
|
||||
rejectUnauthorized: true, // the entire authentication mechanism — see file header
|
||||
};
|
||||
|
||||
const server = https.createServer(tlsOptions, handleRequest);
|
||||
server.on('upgrade', handleUpgrade);
|
||||
server.on('tlsClientError', (err) => console.warn('[lab-router] rejected unauthenticated/invalid TLS client:', err.message));
|
||||
|
||||
server.listen(PORT, () => console.log(`Lab Host Router listening on :${PORT} (mTLS required)`));
|
||||
@@ -0,0 +1,73 @@
|
||||
#!/usr/bin/env node
|
||||
// Fast, isolated unit test for resolve.js's token->container logic — no live Docker daemon, no
|
||||
// TLS material, no network. Uses a fake dockerode-shaped client so this runs in milliseconds
|
||||
// as part of every regression pass. The REAL cross-host proxying behavior (mTLS handshake,
|
||||
// actual container resolution, HTTP+WS traffic) is covered by the two-host simulation harness
|
||||
// instead — see infra/scripts/simulate-two-host/README.md and
|
||||
// docs/PHASE4_1_PREPRODUCTION_HARDENING.md §6, not duplicated here.
|
||||
|
||||
const assert = require('assert');
|
||||
const { resolveTarget, tokenFingerprint } = require('../src/resolve');
|
||||
|
||||
function fakeDocker(containers) {
|
||||
return {
|
||||
listContainers: async ({ filters }) => {
|
||||
const parsed = JSON.parse(filters);
|
||||
const wantLabel = parsed.label[0];
|
||||
const wantStatus = parsed.status[0];
|
||||
return containers.filter((c) => c.Labels && `${Object.keys(c.Labels)[0]}=${Object.values(c.Labels)[0]}` === wantLabel && c.State === wantStatus);
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
async function main() {
|
||||
const runningContainer = {
|
||||
Labels: { 'rootnode.routing-token': 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' },
|
||||
State: 'running',
|
||||
NetworkSettings: { Networks: { 'rootnode-lab-net-abc': { IPAddress: '172.20.0.5' } } },
|
||||
};
|
||||
|
||||
{
|
||||
const docker = fakeDocker([runningContainer]);
|
||||
const target = await resolveTarget(docker, 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa');
|
||||
assert.strictEqual(target, 'http://172.20.0.5:80', 'known running token resolves to its container');
|
||||
console.log('ok — known token resolves to the correct container address');
|
||||
}
|
||||
|
||||
{
|
||||
const docker = fakeDocker([runningContainer]);
|
||||
const target = await resolveTarget(docker, 'bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb');
|
||||
assert.strictEqual(target, null, 'unknown token resolves to nothing');
|
||||
console.log('ok — unknown token resolves to null (404 at the HTTP layer)');
|
||||
}
|
||||
|
||||
{
|
||||
// Simulates a destroyed/reset environment: the container that used to match this label is
|
||||
// gone (not present in the list at all — a real reset/destroy removes the old container).
|
||||
const docker = fakeDocker([]);
|
||||
const target = await resolveTarget(docker, 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa');
|
||||
assert.strictEqual(target, null, 'stale token (container destroyed) resolves to nothing');
|
||||
console.log('ok — stale/destroyed-environment token resolves to null, same as unknown');
|
||||
}
|
||||
|
||||
{
|
||||
const docker = fakeDocker([runningContainer]);
|
||||
for (const garbage of [undefined, null, '', 'short', 123, {}]) {
|
||||
const target = await resolveTarget(docker, garbage);
|
||||
assert.strictEqual(target, null, `garbage input ${JSON.stringify(garbage)} must not resolve`);
|
||||
}
|
||||
console.log('ok — garbage/malformed tokens are rejected before ever touching Docker');
|
||||
}
|
||||
|
||||
{
|
||||
assert.strictEqual(tokenFingerprint('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'), 'aaaaaa…(32)');
|
||||
assert.strictEqual(tokenFingerprint(undefined), '(none)');
|
||||
const fp = tokenFingerprint('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa');
|
||||
assert.ok(!fp.includes('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'), 'fingerprint never contains the full token — never logged in plaintext');
|
||||
console.log('ok — token fingerprint for logs never reveals the full token');
|
||||
}
|
||||
|
||||
console.log('\nAll lab-router unit tests passed.');
|
||||
}
|
||||
|
||||
main().catch((e) => { console.error(e); process.exit(1); });
|
||||
Reference in New Issue
Block a user