Hello everyone,
I would like to save the messages from the console in a new log every day so that I can receive the error message if Node-RED crashes.
What do I need to change in the settings.js file to create a daily log file in the folder where the settings.js file is located? Saving the logs in a subfolder called “logs” would also be an option.
The log should save the following information, which can also be seen in the console:
20 Aug 09:50:36 - [info]
Welcome to Node-RED
===================
20 Aug 09:50:36 - [info] Node-RED version: v4.0.9
20 Aug 09:50:36 - [info] Node.js version: v22.17.1
20 Aug 09:50:36 - [info] Windows_NT 10.0.26100 x64 LE
20 Aug 09:50:37 - [info] Loading palette nodes
20 Aug 09:50:37 - [info] Settings file : C:\Users\RS7340\.node-red\settings.js
20 Aug 09:50:37 - [info] Context store : 'default' [module=memory]
20 Aug 09:50:37 - [info] User directory : \Users\RS7340\.node-red
20 Aug 09:50:37 - [warn] Projects disabled : editorTheme.projects.enabled=false
20 Aug 09:50:37 - [info] Flows file : \Users\RS7340\.node-red\flows.json
20 Aug 09:50:37 - [info] Creating new flow file
I no longer use this but it is an example of the type you mention. (I have a separate log output to MQTT on my dev instance so that I can view detailed logs from uibuilder on a web page).
/** Custom logging: https://nodered.org/docs/user-guide/runtime/logging */
tilog: {
level: 'trace',
metrics: false,
audit: false,
handler: function(settings) {
// Called when the logger is initialised
const fs = require('fs')
const util = require('util')
const Chalk = require('chalk')
const chalk = new Chalk.Instance({level: 3})
// Use flags 'a' to append or 'w' to create new on restart
const log_file = fs.createWriteStream(__dirname + '/uibuilder.log', {flags : 'w'})
const tilogLevels = {
10: 'FATAL', 20: 'ERROR', 30: 'WARN ', 40: 'INFO ', 50: 'DEBUG', 60: 'TRACE', 98: 'AUDIT', 99: 'MTRIC'
}
const tilog = function(d) { //
log_file.write(util.format.apply(null, arguments) + '\n')
//log_stdout.write(util.format(d) + '\n');
}
/** Return the logging function
* msg schema: { id, level, type, msg, timestamp}
* id = The node instance that produces the msg
* level = 10: fatal, 20: error, 30: warn, 40: Info, 50: Debug, 60: Trace
* timestamp = Javascript timestamp. Use `(new Date(msg.timestamp)).toIsoString()` or similar to convert
* type = 'flow' - not clear when/why this is produced
*/
return function(msg) {
if ( msg.level < 51 || msg.msg.includes('[uibuilder') || msg.msg.startsWith('+-') || msg.msg.startsWith('| ') || msg.msg.startsWith('>>') ) {
//console.log('TOLOG: ', msg)
if (msg.msg.includes('[uibuilder:')) msg.msg = msg.msg.replace('[uibuilder:', '[')
let msgColor, introColor
switch (msg.level) {
case 10: { // fatal
msgColor = chalk.redBright
introColor = msgColor.bold.inverse
break
}
case 20: { // error
msgColor = chalk.red
introColor = msgColor.inverse
break
}
case 30: { // warn
msgColor = chalk.rgb(255, 185, 0)
introColor = msgColor.inverse
break
}
case 40: { // info
msgColor = chalk.yellow
introColor = msgColor.inverse
break
}
case 50: { // debug
msgColor = chalk.greenBright
introColor = msgColor.inverse
break
}
case 60: { // trace
msgColor = chalk.cyanBright
introColor = msgColor.inverse
break
}
default: {
msgColor = chalk.reset
introColor = msgColor.inverse
break
}
}
let intro = introColor(tilogLevels[msg.level]+'|')
tilog( intro, msgColor(msg.msg) )
}
// else {
// tilog(
// `?? ${tilogLevels[msg.level]}:`, msg.msg
// )
// }
}
}
},
As an alternative, you might want to look at using the winston logging tool.
In your service invocation script, make sure you redirect the output to the log file with >> (append) and not > (replace).
A problem I encountered when running as a service with NSSM, is that it automatically restarts the Node-RED server process upon crash. Hence the process may be constantly crashing & restarting without me knowing about it.
Does anyone know how to control this?
You can control everything from there. You can even run another programme on error failure. You could use an AutoHotKey script to show a dialog box for example.
