1/25/2024 0 Comments Node.js for mac![]() Unfortunately, while it runs, we're unable to view the processes using forever. The idea is to be able to launch it this way: $ sudo launchctl load /Library/LaunchDaemons/com. Save it as /Library/LaunchDaemons/ then make sure it's owned correctly: $ sudo chown root /Library/LaunchDaemons/ $ sudo chmod 0644 /Library/LaunchDaemons/ One uses a plist of this shape: KeepAlive SuccessfulExit Label ProgramArguments /opt/local/bin/node /opt/local/bin/forever -a -l /var/log/ -e /var/log/_error.log -w /Users/david/t/server.js /Users/david/t/server.js RunAtLoad StartInterval 3600 I found a solution over on stackoverflow. Maybe we want to use forever to manage this. However, we reboot the system and the process doesn't restart. ![]() It means we can log out, log back in, and the process will still be there. Notice that the parent process of the forever/bin/monitor.js process is process#1 which is /etc/init. While running the processes look like this: $ ps -eaf | grep nodeĥ01 48939 1 0 3: 48PM ? 0: 00.50 /opt/local /bin/node /opt/local /lib/node_modules /forever/bin/monitor server.jsĥ01 48943 48939 0 3: 49PM ? 0: 00.12 /opt/local /bin/node /Users/david/server.js $ forever logs 0ĭata: server.js: 49219 - > hello world running on port 8080ĭata: server.js: 49219 - error: restarting script because /Users/david/t/ server.js changedĭata: server.js: 49219 - error: Forever detected script was killed by signal: SIGKILLĭata: server.js: 49219 - error: Forever restarting script for 1 time Then after making a change, we can reload the page and see the change, and also see this in the logs. However, we can instruct forever to watch and automatically reload changes: $ forever start -w server.js server.js Which restarts and reloads the application. Forever makes this fairly easy, with two different methods. Since this is about developing Node applications, we want to be able to edit our code and automatically reload the application. For example we can view the logfile this way: $ forever logs 0ĭata: server.js: 48844 - > hello world running on port 8080 The indicates the script index, and is used in some of the forever commands to identify the script to act on. You can query the status of servers this way: $ forever listĭata: uid command script forever pid logfile uptimeĭata: 4NdQ /opt/local /bin/node server.js 48843 48844 /Users/david /.forever/ 4NdQ.log 0: 0: 2: 11.320 If you have multiple applications you're developing it's simple enough to ensure that, for development, they're running on different ports, eh? Maybe. Your script will exit if it does not stay up for at least 1000ms info: Forever processing file: server.js Note that I've modified it to run on port 8080, because on the Mac an Apache process is running on port 80 (assuming you've enabled Web Sharing in the control panel).Ī required bit of setup is to run this: $ npm install optimistĪnd then you start the server this way: $ forever start server.js ![]() puts( '> hello world running on port ' + port) It has start, stop and restart commands to manage processes, as well as a list command to show the current processes.Įxample scripts that demonstrate using forever is a simple server that we can play with: var util = require( 'util'), Type this to get a list of options: $ forever - help While forever has an API, we'll be using it as a command line tool. Installation is straightforward $ sudo npm install forever -g Out of the box forever doesn't integrate with either, but it's possible to write a little wrapper script. On a Mac, launchd serves the same purpose. It's functionality is similar to the init daemon on Linux systems, except it doesn't run at system boot-up time. Forever is a simple CLI-oriented tool to ensure that a Node process runs continuously.
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