replace debug() with our custom logger

mostly we want trace() and log(). trace() can be enabled whenever
we want by flipping a flag and restarting box

src/metrics.js

@@ -2,7 +2,7 @@ import apps from './apps.js';
 import assert from 'node:assert';
 import BoxError from './boxerror.js';
 import constants from './constants.js';
-import debugModule from 'debug';
+import logger from './logger.js';
 import docker from './docker.js';
 import fs from 'node:fs';
 import net from 'node:net';
@@ -15,7 +15,7 @@ import shellModule from './shell.js';
 import superagent from '@cloudron/superagent';
 import _ from './underscore.js';
 
-const debug = debugModule('box:metrics');
+const { log, trace } = logger('metrics');
 const shell = shellModule('metrics');
 
 
@@ -163,7 +163,7 @@ async function readSystemMetrics() {
 }
 
 async function sendToGraphite() {
-    // debug('sendStatsToGraphite: collecting stats');
+    // log('sendStatsToGraphite: collecting stats');
 
     const result = await readSystemMetrics();
 
@@ -203,7 +203,7 @@ async function sendToGraphite() {
         });
 
         client.on('error', (error) => {
-            debug(`Error sending data to graphite: ${error.message}`);
+            log(`Error sending data to graphite: ${error.message}`);
             resolve();
         });
 
@@ -381,7 +381,7 @@ async function pipeContainerToMap(name, statsMap) {
     // we used to poll before instead of a stream. but docker caches metrics internally and rate logic has to handle dups
     const statsStream = await docker.getStats(name, { stream: true });
 
-    statsStream.on('error', (error) => debug(error));
+    statsStream.on('error', (error) => log(error));
     statsStream.on('data', (data) => {
         const stats = JSON.parse(data.toString('utf8'));
         const metrics = translateContainerStatsSync(stats);
@@ -478,7 +478,7 @@ async function getStream(options) {
 
     const INTERVAL_MSECS = 1000;
     intervalId = setInterval(async () => {
-        if (options.system) await safe(pipeSystemToMap(statsMap), { debug });
+        if (options.system) await safe(pipeSystemToMap(statsMap), { debug: log });
 
         const result = {};
         const nowSecs = Date.now() / 1000; // to match graphite return value