add bridge (#18)

Author: yaacov

.eslintignore

@@ -1,4 +1,5 @@
 # Ignore artifacts:
 dist/
 node_modules/
-types/
+types/
+bridge/

bridge/environment.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env sh
+
+BRIDGE_CLUSTER_ENDPOINT=$(oc whoami --show-server)
+export BRIDGE_CLUSTER_ENDPOINT
+
+BRIDGE_CLUSTER_THANOS=$(oc -n openshift-config-managed get configmap monitoring-shared-config -o jsonpath='{.data.thanosPublicURL}')
+export BRIDGE_CLUSTER_THANOS
+
+BRIDGE_CLUSTER_ALERTMANAGER=$(oc -n openshift-config-managed get configmap monitoring-shared-config -o jsonpath='{.data.alertmanagerPublicURL}')
+export BRIDGE_CLUSTER_ALERTMANAGER
+
+BRIDGE_AUTH_BEARER_TOKEN=$(oc whoami --show-token)
+export BRIDGE_AUTH_BEARER_TOKEN

bridge/index.js

@@ -0,0 +1,64 @@
+#!/usr/bin/env node
+
+const express = require('express');
+const morgan = require('morgan');
+const { createProxyMiddleware } = require('http-proxy-middleware');
+const { Command, Option } = require('commander');
+const program = new Command();
+
+// Parse user variables
+program
+  .addOption(new Option('-p, --port <number>', 'proxy server port number').default(9090).env('BRIDGE_PORT'))
+  .addOption(new Option('-u, --host <host>', 'proxy server host name').default('0.0.0.0').env('BRIDGE_HOST'))
+  .addOption(new Option('-s, --staticFiles <dir>', 'the root directory from which to serve static assets').default('./docs'))
+  .addOption(new Option('-e, --clusterEndpoint <endpoint>', 'drink size').makeOptionMandatory(true).env('BRIDGE_CLUSTER_ENDPOINT'))
+  .addOption(new Option('-t, --clusterThanos <thanos>', 'drink size').makeOptionMandatory(true).env('BRIDGE_CLUSTER_THANOS'))
+  .addOption(new Option('-a, --authBearerToken <auth>', 'port number').makeOptionMandatory(true).env('BRIDGE_AUTH_BEARER_TOKEN'));
+
+program.parse();
+const options = program.opts();
+
+// Printout options
+console.log({...options, authBearerToken: 'hidden'})
+
+// Create Express Server
+const app = express();
+app.disable("x-powered-by");
+
+// Logging
+app.use(morgan('dev'));
+
+// Info GET endpoint
+app.get('/info', (req, res) => {
+    res.json({app:'kubevirt ui bridge', k8s_server: '', metrics_server: ''});
+});
+
+// Proxy endpoints
+app.use('/api/kubernetes', createProxyMiddleware({
+    target: options.clusterEndpoint,
+    secure: false,
+    changeOrigin: true,
+    ws: true,
+    headers: {Authorization:`Bearer ${options.authBearerToken}`},
+    pathRewrite: {
+        [`^/api/kubernetes`]: '',
+    },
+ }));
+
+ app.use('/api/prometheus', createProxyMiddleware({
+    target: options.clusterThanos,
+    secure: false,
+    changeOrigin: true,
+    pathRewrite: {
+        [`^/api/prometheus`]: '',
+    },
+ }));
+ 
+ // Serve static files
+ app.use(express.static(options.staticFiles));
+
+ // Start the Proxy
+app.listen(options.port, options.host, () => {
+    console.log(`Starting kubevirt ui bridge ${options.host}:${options.port}`);
+    console.log(`On localhost                http://localhost:${options.port}`);
+});

bridge/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "bridge",
+  "version": "1.0.0",
+  "description": "bridge k8s and prometheus api into the dev server",
+  "main": "index.js",
+  "repository": "https://github.com/kubevirt-ui/kubevirt-components/bridge",
+  "author": "[email protected]",
+  "license": "Apache 2",
+  "private": false,
+  "dependencies": {
+    "commander": "^9.0.0",
+    "express": "^4.17.2",
+    "http-proxy-middleware": "^2.0.2",
+    "morgan": "^1.10.0"
+  },
+  "scripts": {
+    "start": "node index.js"
+  }
+}