I have created API using node js and my API is live now (in production) but now I always want to open Cpanel and terminal and run command to start node js API. but now I want like I just run one-time command in terminal and it will run automatically even in my computer is shutdown. or there is another way to do it. and I google it I found some code but it's not work
first, I try this
#!/bin/bash
ps cax | grep node > /dev/null
if [ $? -eq 0 ]; then
echo "Process is running." >/dev/null 2>&1
else
echo "Process is not running."
PATH=$PATH:/usr/local/bin
pm2 start /path/to/your/node/application
fi
then i create bat file. and just simple add node app.js then i create php file and
use this code shell_exec('npm start'); and shell_exec('sh script.sh'); but nothing work.
If you're using pm2 to manage the node process, you can configure pm2 to auto restart the node process after you're computer restarts. refer below link to configure pm2
https://pm2.keymetrics.io/docs/usage/startup/
Hello I Find This answer you just have install pm2 and run pm2 startup then run pm2 save to save your query.
for more information https://pm2.keymetrics.io/docs/usage/startup/
Related
I was looking to test a node server in a shared hosting environment.
I'm using an ssh terminal session to test.
The server works fine, but of course you can't leave the terminal session without stopping the server.
Using pm2 (npm package), I'm able to keep the server running, but on exiting the terminal session, the pm2 job quits as well, which stops the server. Curious why that would be.
Tried using a crontab to run a shell script that in turn runs the pm2 which in turn starts the node server. The cron tab runs every minute, but the node server never starts.
The sh script works just fine, pm2 works fine, and the node server works fine.
What doesn't work: keeping the node server running after exiting the terminal session.
Here's the shell script that runs the pm2 to trigger the node server...
ps cax | grep node > /dev/null
if [ $? -eq 0 ]; then
echo "Process running."
else
echo "Process not running."
PATH=$PATH:/usr/local/bin
pm2 start '/path/to/NodeServer.js' --restart-delay=100
fi
If someone else like me uses pm2 for godaddy shared hosting, and uses a modified version of Habib's answer with pm2 instead of node, do not forget to include path to node into PATH variable, as it is required by pm2:
PATH=$PATH:/home/user/.nvm/versions/node/v11.15.0/bin
pm2 ps | grep 'my-app'
if [ $? -eq 0 ]; then
echo "Process running."
else
echo "Process not running."
cd /home/user/public_html/app
pm2 start app.js --name my-app
fi
The script above works for me. Specifying only full path to pm2 was not working, as it looks for node, which was not in PATH in the cron environment.
ps cax | grep node > /dev/null
if [ $? -eq 0 ]; then
echo "Process running."
else
echo "Process not running."
/home/user/.nvm/versions/node/v11.15.0/bin/node /home/user/public_html/node/app.js
fi
I used this in cron job in GoDaddy Shared hosting and it is working for me. Before this, I used node /home/user/public_html/node/app.js in the same script but it throws an error because of path of the node. Still, I can use node in the terminal but in cron job, I have to use full path.
I need to find a cron command that would restart pm2 with a process but only if it's not already running
pm2 start app.js starts the app even if it's already running.
what would be another command I could use that would only restart app.js if it's not already running and how would I write it in crontab?
There is no default way in pm2 to achieve this instead of that you can write a shell script for that.
#!/bin/bash
pm2 describe appname > /dev/null
RUNNING=$?
if [ "${RUNNING}" -ne 0 ]; then
pm2 start ./yourscriptpath
else
pm2 restart appname
fi;
Save this shell script as pm2_starter.sh and then
crontab -e
and add following there
*/30 * * * * ./home/ridham/stackoverflow/pm2_starter.sh
this will run it every 30 minutes.
Here the script will restart if app is running under pm2 and else it will start it. You are smart enough to edit that as per your use case
I want to write a script which basically runs my node server first and after only node server has started I want to run another script. How can I implement this using shell script?
Right now I have done this so far
echo "Going inside NodeServer folder";
cd ./../Server-Node
echo "Starting Node Server";
npm start
echo 'Going inside Project Folder';
cd ./../ionicApp
ionic serve
A simple hack is to use npm start & add a sleep 15 on the line after it (or adjust accordingly to the avg time the start takes).
Note: to terminate the node process you might have to run a command to kill it stop all instances of node.js server
Otherwise you'll want to look at some stuff here NPM run parallel task, but wait until resource is available to run second task
I found out this later. adding modified script
echo "Going inside Server-Node";
cd ./../Server-Node
echo "Starting Node Server";
npm start & echo OK
echo 'Going inside ionic-Project';
cd ./../learn-ionic
echo 'Starting ionic server';
ionic serve
I am using node's forever module to keep my node server running. Forever however terminates when there is a system restart. Is there any way I can automatically start the node server (with forever) when the system restarts?
I would suggest using crontab. It's easy to use.
How to
To start editing run the following replacing the "testuser" with your desired runtime user for the node process. If you choose a different user other than yourself, you will have to run this with sudo.
$ crontab -u testuser -e
If you have never done this before, it will ask you which editor you wish to edit with. I like vim, but will recommend nano for ease of use.
Once in the editor add the following line:
#reboot /usr/local/bin/forever start /your/path/to/your/app.js
Save the file. You should get some feedback that the cron has been installed.
For further confirmation of the installation of the cron, execute the following (again replacing "testuser" with your target username) to list the currently installed crons:
$ crontab -u testuser -l
Note that in my opinion, you should always use full paths when executing binaries in cron.
Also, if the path to your forever script is not correct, run which forever to get the full path.
Given that forever calls node, you may also want to provide the full path to node:
#reboot /usr/local/bin/forever start -c /usr/local/bin/node /your/path/to/your/app.js
Further Reading
crontab Man Page
Ubuntu Cron HowTo
You can use forever-service for doing this.
npm install -g forever-service
forever-service install test
This will provision app.js in the current directory as a service via forever. The service will automatically restart every time system is restarted. Also when stopped it will attempt a graceful stop. This script provisions the logrotate script as well.
Github url: https://github.com/zapty/forever-service
NOTE: I am the author of forever-service.
Install PM2 globally using NPM
npm install pm2 -g
Start your script with pm2
pm2 start app.js
generate an active startup script
pm2 startup
NOTE: pm2 startup is for startting the PM2 when the system reboots. PM2 once started, restarts all the processes it had been managing before the system went down.
In case you want to disable the automatic startup, simply use pm2 unstartup
If you want the startup script to be executed under another user, just use the -u <username> option and the --hp <user_home>:
This case is valid for Debian.
Add the following to /etc/rc.local
/usr/bin/sudo -u {{user}} /usr/local/bin/forever start {{app path}}
{{user}} replaces your username.
{{app path}} replaces your app path. For example, /var/www/test/app.js
An alternative crontab method inspired by this answer and this blog post.
1. Create a bash script file (change bob to desired user).
vi /home/bob/node_server_init.sh
2. Copy and paste this inside the file you've just created.
#!/bin/sh
export NODE_ENV=production
export PATH=/usr/local/bin:$PATH
forever start /node/server/path/server.js > /dev/null
Make sure to edit the paths above according to your config!
3. Make sure the bash script can be executed.
chmod 700 /home/bob/node_server_init.sh
4. Test the bash script.
sh /home/bob/node_server_init.sh
5. Replace "bob" with the runtime user for node.
crontab -u bob -e
6. Copy and paste (change bob to desired user).
#reboot /bin/sh /home/bob/node_server_init.sh
Save the crontab.
You've made it to the end, your prize is a reboot (to test) :)
Copied answer from the attached question.
You can use PM2, it's a production process manager for Node.js applications with a built-in load balancer.
Install PM2
$ npm install pm2 -g
Start an application
$ pm2 start app.js
If you using express then you can start your app like
pm2 start ./bin/www --name="app"
Listing all running processes:
$ pm2 list
It will list all process. You can then stop / restart your service by using ID or Name of the app with following command.
$ pm2 stop all
$ pm2 stop 0
$ pm2 restart all
To display logs
$ pm2 logs ['all'|app_name|app_id]
You need to create a shell script in the /etc/init.d folder for that. It's sort of complicated if you never have done it but there is plenty of information on the web on init.d scripts.
Here is a sample a script that I created to run a CoffeeScript site with forever:
#!/bin/bash
#
# initd-example Node init.d
#
# chkconfig: 345
# description: Script to start a coffee script application through forever
# processname: forever/coffeescript/node
# pidfile: /var/run/forever-initd-hectorcorrea.pid
# logfile: /var/run/forever-initd-hectorcorrea.log
#
# Based on a script posted by https://gist.github.com/jinze at https://gist.github.com/3748766
#
# Source function library.
. /lib/lsb/init-functions
pidFile=/var/run/forever-initd-hectorcorrea.pid
logFile=/var/run/forever-initd-hectorcorrea.log
sourceDir=/home/hectorlinux/website
coffeeFile=app.coffee
scriptId=$sourceDir/$coffeeFile
start() {
echo "Starting $scriptId"
# This is found in the library referenced at the top of the script
start_daemon
# Start our CoffeeScript app through forever
# Notice that we change the PATH because on reboot
# the PATH does not include the path to node.
# Launching forever or coffee with a full path
# does not work unless we set the PATH.
cd $sourceDir
PATH=/usr/local/bin:$PATH
NODE_ENV=production PORT=80 forever start --pidFile $pidFile -l $logFile -a -d --sourceDir $sourceDir/ -c coffee $coffeeFile
RETVAL=$?
}
restart() {
echo -n "Restarting $scriptId"
/usr/local/bin/forever restart $scriptId
RETVAL=$?
}
stop() {
echo -n "Shutting down $scriptId"
/usr/local/bin/forever stop $scriptId
RETVAL=$?
}
status() {
echo -n "Status $scriptId"
/usr/local/bin/forever list
RETVAL=$?
}
case "$1" in
start)
start
;;
stop)
stop
;;
status)
status
;;
restart)
restart
;;
*)
echo "Usage: {start|stop|status|restart}"
exit 1
;;
esac
exit $RETVAL
I had to make sure the folder and PATHs were explicitly set or available to the root user since init.d scripts are ran as root.
Use the PM2
Which is the best option to run the server production server
What are the advantages of running your application this way?
PM2 will automatically restart your application if it crashes.
PM2 will keep a log of your unhandled exceptions - in this case, in a file at /home/safeuser/.pm2/logs/app-err.log.
With one command, PM2 can ensure that any applications it manages restart when the server reboots. Basically, your node application will start as a service.
ref: https://www.digitalocean.com/community/tutorials/how-to-use-pm2-to-setup-a-node-js-production-environment-on-an-ubuntu-vps
Forever was not made to get node applications running as services. The right approach is to either create an /etc/inittab entry (old linux systems) or an upstart (newer linux systems).
Here's some documentation on how to set this up as an upstart:
https://github.com/cvee/node-upstart
crontab does not work for me on CentOS x86 6.5. #reboot seems to be not working.
Finally I got this solution:
Edit: /etc/rc.local
sudo vi /etc/rc.local
Add this line to the end of the file. Change USER_NAME and PATH_TO_PROJECT to your own. NODE_ENV=production means the app runs in production mode. You can add more lines if you need to run more than one node.js app.
su - USER_NAME -c "NODE_ENV=production /usr/local/bin/forever start /PATH_TO_PROJECT/app.js"
Don't set NODE_ENV in a separate line, your app will still run in development mode, because forever does not get NODE_ENV.
# WRONG!
su - USER_NAME -c "export NODE_ENV=production"
Save and quit vi (press ESC : w q return). You can try rebooting your server. After your server reboots, your node.js app should run automatically, even if you don't log into any account remotely via ssh.
You'd better set NODE_ENV environment in your shell. NODE_ENV will be set automatically when your account USER_NAME logs in.
echo export NODE_ENV=production >> ~/.bash_profile
So you can run commands like forever stop/start /PATH_TO_PROJECT/app.js via ssh without setting NODE_ENV again.
I wrote a script that does exactly this:
https://github.com/chovy/node-startup
I have not tried with forever, but you can customize the command it runs, so it should be straight forward:
/etc/init.d/node-app start
/etc/init.d/node-app restart
/etc/init.d/node-app stop
The problem with rc.local is that the commands are accessed as root which is different than logging to as a user and using sudo.
I solved this problem by adding a .sh script with the startup commands i want to etc/profile.d. Any .sh file in profile.d will load automatically and any command will be treated as if you used the regular sudo.
The only downside to this is the specified user needs to loggin for things to start which in my situation was always the case.
I tried lots of the above answers. None of them worked for me. My app is installed in /home and as user, not as root. This probably means that when the above mentioned start scripts run, /home is not mounted yet, so the app is not started.
Then I found these instructions by Digital Ocean:
https://www.digitalocean.com/community/tutorials/how-to-use-pm2-to-setup-a-node-js-production-environment-on-an-ubuntu-vps
Using PM2 as explained was very simple and works perfectly: My virtual servers had two physical crashes since - downtime was only about a minute.
complete example crontab (located at /etc/crontab) ..
#!/bin/bash
# edit this file with .. crontab -u root -e
# view this file with .. crontab -u root -l
# put your path here if it differs
PATH=/root/bin:/root/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin
# * * * * * echo "executes once every minute" > /root/deleteme
#reboot cd /root/bible-api-dbt-server; npm run forever;
#reboot cd /root/database-api-server; npm run forever;
#reboot cd /root/mailer-api-server; npm run forever;
I have found my own solution by using serve & npm as follows:
Install serve package: npm install -g serve
Then have the command serve -s /var/www/sitename to execute on reboot.
This is what works for me on my VPS.
You can use the following command in your shell to start your node forever:
forever app.js //my node script
You need to keep in mind that the server on which your app is running should always be kept on.
I connect to the linux server via putty SSH. I tried to run it as a background process like this:
$ node server.js &
However, after 2.5 hrs the terminal becomes inactive and the process dies. Is there anyway I can keep the process alive even with the terminal disconnected?
Edit 1
Actually, I tried nohup, but as soon as I close the Putty SSH terminal or unplug my internet, the server process stops right away.
Is there anything I have to do in Putty?
Edit 2 (on Feb, 2012)
There is a node.js module, forever. It will run node.js server as daemon service.
nohup node server.js > /dev/null 2>&1 &
nohup means: Do not terminate this process even when the stty is cut
off.
> /dev/null means: stdout goes to /dev/null (which is a dummy
device that does not record any output).
2>&1 means: stderr also goes to the stdout (which is already redirected to /dev/null). You may replace &1 with a file path to keep a log of errors, e.g.: 2>/tmp/myLog
& at the end means: run this command as a background task.
Simple solution (if you are not interested in coming back to the process, just want it to keep running):
nohup node server.js &
There's also the jobs command to see an indexed list of those backgrounded processes. And you can kill a backgrounded process by running kill %1 or kill %2 with the number being the index of the process.
Powerful solution (allows you to reconnect to the process if it is interactive):
screen
You can then detach by pressing Ctrl+a+d and then attach back by running screen -r
Also consider the newer alternative to screen, tmux.
You really should try to use screen. It is a bit more complicated than just doing nohup long_running &, but understanding screen once you never come back again.
Start your screen session at first:
user#host:~$ screen
Run anything you want:
wget http://mirror.yandex.ru/centos/4.6/isos/i386/CentOS-4.6-i386-binDVD.iso
Press ctrl+A and then d. Done. Your session keeps going on in background.
You can list all sessions by screen -ls, and attach to some by screen -r 20673.pts-0.srv command, where 0673.pts-0.srv is an entry list.
This is an old question, but is high ranked on Google. I almost can't believe on the highest voted answers, because running a node.js process inside a screen session, with the & or even with the nohup flag -- all of them -- are just workarounds.
Specially the screen/tmux solution, which should really be considered an amateur solution. Screen and Tmux are not meant to keep processes running, but for multiplexing terminal sessions. It's fine, when you are running a script on your server and want to disconnect. But for a node.js server your don't want your process to be attached to a terminal session. This is too fragile. To keep things running you need to daemonize the process!
There are plenty of good tools to do that.
PM2: http://pm2.keymetrics.io/
# basic usage
$ npm install pm2 -g
$ pm2 start server.js
# you can even define how many processes you want in cluster mode:
$ pm2 start server.js -i 4
# you can start various processes, with complex startup settings
# using an ecosystem.json file (with env variables, custom args, etc):
$ pm2 start ecosystem.json
One big advantage I see in favor of PM2 is that it can generate the system startup script to make the process persist between restarts:
$ pm2 startup [platform]
Where platform can be ubuntu|centos|redhat|gentoo|systemd|darwin|amazon.
forever.js: https://github.com/foreverjs/forever
# basic usage
$ npm install forever -g
$ forever start app.js
# you can run from a json configuration as well, for
# more complex environments or multi-apps
$ forever start development.json
Init scripts:
I'm not go into detail about how to write a init script, because I'm not an expert in this subject and it'd be too long for this answer, but basically they are simple shell scripts, triggered by OS events. You can read more about this here
Docker:
Just run your server in a Docker container with -d option and, voilá, you have a daemonized node.js server!
Here is a sample Dockerfile (from node.js official guide):
FROM node:argon
# Create app directory
RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app
# Install app dependencies
COPY package.json /usr/src/app/
RUN npm install
# Bundle app source
COPY . /usr/src/app
EXPOSE 8080
CMD [ "npm", "start" ]
Then build your image and run your container:
$ docker build -t <your username>/node-web-app .
$ docker run -p 49160:8080 -d <your username>/node-web-app
Always use the proper tool for the job. It'll save you a lot of headaches and over hours!
another solution disown the job
$ nohup node server.js &
[1] 1711
$ disown -h %1
nohup will allow the program to continue even after the terminal dies. I have actually had situations where nohup prevents the SSH session from terminating correctly, so you should redirect input as well:
$ nohup node server.js </dev/null &
Depending on how nohup is configured, you may also need to redirect standard output and standard error to files.
Nohup and screen offer great light solutions to running Node.js in the background. Node.js process manager (PM2) is a handy tool for deployment. Install it with npm globally on your system:
npm install pm2 -g
to run a Node.js app as a daemon:
pm2 start app.js
You can optionally link it to Keymetrics.io a monitoring SAAS made by Unitech.
$ disown node server.js &
It will remove command from active task list and send the command to background
I have this function in my shell rc file, based on #Yoichi's answer:
nohup-template () {
[[ "$1" = "" ]] && echo "Example usage:\nnohup-template urxvtd" && return 0
nohup "$1" > /dev/null 2>&1 &
}
You can use it this way:
nohup-template "command you would execute here"
Have you read about the nohup command?
To run command as a system service on debian with sysv init:
Copy skeleton script and adapt it for your needs, probably all you have to do is to set some variables. Your script will inherit fine defaults from /lib/init/init-d-script, if something does not fits your needs - override it in your script. If something goes wrong you can see details in source /lib/init/init-d-script. Mandatory vars are DAEMON and NAME. Script will use start-stop-daemon to run your command, in START_ARGS you can define additional parameters of start-stop-daemon to use.
cp /etc/init.d/skeleton /etc/init.d/myservice
chmod +x /etc/init.d/myservice
nano /etc/init.d/myservice
/etc/init.d/myservice start
/etc/init.d/myservice stop
That is how I run some python stuff for my wikimedia wiki:
...
DESC="mediawiki articles converter"
DAEMON='/home/mss/pp/bin/nslave'
DAEMON_ARGS='--cachedir /home/mss/cache/'
NAME='nslave'
PIDFILE='/var/run/nslave.pid'
START_ARGS='--background --make-pidfile --remove-pidfile --chuid mss --chdir /home/mss/pp/bin'
export PATH="/home/mss/pp/bin:$PATH"
do_stop_cmd() {
start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 \
$STOP_ARGS \
${PIDFILE:+--pidfile ${PIDFILE}} --name $NAME
RETVAL="$?"
[ "$RETVAL" = 2 ] && return 2
rm -f $PIDFILE
return $RETVAL
}
Besides setting vars I had to override do_stop_cmd because of python substitutes the executable, so service did not stop properly.
Apart from cool solutions above I'd mention also about supervisord and monit tools which allow to start process, monitor its presence and start it if it died. With 'monit' you can also run some active checks like check if process responds for http request
For Ubuntu i use this:
(exec PROG_SH &> /dev/null &)
regards
Try this for a simple solution
cmd & exit