How to store node-red logs in local storage? - raspbian

Question

I have setup node-red in Raspbian and I want to store the logs coming from node-red client in some storage place like .log file.

Answer 1

Two ways this can be done.
Write a log function for the standard logging module. https://nodered.org/docs/user-guide/logging
Use a third part node-red module to take care of logging to file. Something like - https://flows.nodered.org/node/node-red-contrib-advance-logger

Answer 2

The default install for Node-RED on raspbian will set it up as a service and the logs will be sent to syslog already.
The logs can be accesses withe the node-red-log tool or by using the journalctrl command

Answer 3

The hack to store node-red logs in linux distribution systems just follow the below steps:-
Create a custom node-red service in /etc/systemd/system/
Command to make a .service file nano /etc/systemd/system/node-red-custom.service
[Unit]
Description=Node-RED is a tool for wiring together hardware devices, APIs and online services in new and interesting ways.
After=syslog.target network.target
Documentation=http://nodered.org/
[Service]
#Full Path to Node.js
ExecStart= /usr/bin/node-red
WorkingDirectory=/root/node-red/
# User/Group that launches node-RED (it's advised to create a new user for Node-RED)
# You can do : sudo useradd node-red
# then change the User=root by User=node-red
User=root
Group=root
Nice=10
#SyslogIdentifier=Node-RED
SyslogIdentifier=node-red-custom
StandardOutput=syslog
StandardError=syslog
# Make Node-RED restart if it fails
Restart=on-failure
# Node-RED need a SIGINT to be notified to stop
KillSignal=SIGINT
[Install]
WantedBy=multi-user.target
2.Make configuration file which targets where do you want to store the logs
nano /etc/rsyslog.d/node-red-custom.conf
if $programname == 'node-red-custom' then /var/log/node-red-logs.log
& stop
after creating these two file please run below commands
sudo systemctl restart rsyslog
sudo systemctl enable node-red-custom.service
sudo systemctl start node-red-custom.service
Now your custom node-red service start storing logs in /var/log/node-red-logs.log
Note:- You must kill the running node-red service before enable the custom node-red service as mentioned above.