Keep This !! Java Process Manager 2 (PM2) Cheat Sheet

Java Process Manager 2 (PM2)

PM2 is a production java process manager for Node.js applications with a built-in load balancer. It allows you to keep applications alive forever, to reload them without downtime and to facilitate common system admin tasks.

Contents

Java Process Manager 2 (PM2)#Installation #Start an app # Specify an app name # Watch and Restart app when files change # Set memory threshold for app reload # Specify log file # Pass extra arguments to the script # Delay between automatic restarts # Prefix logs with time # Do not auto restart app # Specify cron for forced restart # Attach to application log #Managing processes #List managed applications #Display logs #Terminal Based Dashboard #Cluster mode #Restart application on changes #Updating PM2 CheatSheet Java Process Manager 2 # Fork mode # Cluster mode # Listing # Logs # Actions # Misc

#Installation

npm install pm2@latest -g

1	npm install pm2@latest -g

#Start an app

pm2 start app.js
pm2 start bashscript.sh
pm2 start python-app.py --watch
pm2 start binary-file -- --port 1520

pm2 start app.js

pm2 start bashscript.sh

pm2 start python-app.py --watch

pm2 start binary-file -- --port 1520

# Specify an app name

--name <app_name>

1	--name <app_name>

# Watch and Restart app when files change

--watch

--watch

# Set memory threshold for app reload

--max-memory-restart <200MB>

1	--max-memory-restart <200MB>

# Specify log file

--log <log_path>

1	--log <log_path>

# Pass extra arguments to the script

-- arg1 arg2 arg3

1	-- arg1 arg2 arg3

# Delay between automatic restarts

--restart-delay <delay in ms>

1	--restart-delay <delay in ms>

# Prefix logs with time

--time

--time

# Do not auto restart app

--no-autorestart

1	--no-autorestart

# Specify cron for forced restart

--cron <cron_pattern>

1	--cron <cron_pattern>

# Attach to application log

--no-daemon

1	--no-daemon

#Managing processes

pm2 restart app_name
pm2 reload app_name
pm2 stop app_name
pm2 delete app_name

pm2 restart app_name

pm2 reload app_name

pm2 stop app_name

pm2 delete app_name

#List managed applications

pm2 [list|ls|status]

1	pm2 [list\|ls\|status]

#Display logs

pm2 logs
pm2 logs --lines 200

1 2	pm2 logs pm2 logs --lines 200

#Terminal Based Dashboard

pm2 monit

pm2 monit

#Cluster mode

pm2 start app.js -i max

1	pm2 start app.js -i max

#Restart application on changes

cd /path/to/my/app
pm2 start env.js --watch --ignore-watch="node_modules"

1 2	cd /path/to/my/app pm2 start env.js --watch --ignore-watch="node_modules"

#Updating PM2

npm install pm2@latest -g && pm2 update</code>py

1	npm install pm2@latest -g && pm2 update</code>py

CheatSheet Java Process Manager 2

# Fork mode

pm2 start app.js --name my-api # Name process</code>y

1	pm2 start app.js --name my-api # Name process</code>y

# Cluster mode

pm2 start app.js -i 0        # Will start maximum processes with LB depending on available CPUs
pm2 start app.js -i max      # Same as above, but deprecated.
pm2 scale app +3             # Scales `app` up by 3 workers
pm2 scale app 2              # Scales `app` up or down to 2 workers total

pm2 start app.js -i 0 # Will start maximum processes with LB depending on available CPUs

pm2 start app.js -i max # Same as above, but deprecated.

pm2 scale app +3 # Scales `app` up by 3 workers

pm2 scale app 2 # Scales `app` up or down to 2 workers total

# Listing

pm2 list               # Display all processes status
pm2 jlist              # Print process list in raw JSON
pm2 prettylist         # Print process list in beautified JSON

pm2 describe 0         # Display all informations about a specific process

pm2 monit              # Monitor all processes

pm2 list # Display all processes status

pm2 jlist # Print process list in raw JSON

pm2 prettylist # Print process list in beautified JSON

pm2 describe 0 # Display all informations about a specific process

pm2 monit # Monitor all processes

# Logs

pm2 logs [--raw]       # Display all processes logs in streaming
pm2 flush              # Empty all log files
pm2 reloadLogs         # Reload all logs

pm2 logs [--raw] # Display all processes logs in streaming

pm2 flush # Empty all log files

pm2 reloadLogs # Reload all logs

# Actions

pm2 stop all           # Stop all processes
pm2 restart all        # Restart all processes

pm2 reload all         # Will 0s downtime reload (for NETWORKED apps)

pm2 stop 0             # Stop specific process id
pm2 restart 0          # Restart specific process id

pm2 delete 0           # Will remove process from pm2 list
pm2 delete all         # Will remove all processes from pm2 list

pm2 stop all # Stop all processes

pm2 restart all # Restart all processes

pm2 reload all # Will 0s downtime reload (for NETWORKED apps)

pm2 stop 0 # Stop specific process id

pm2 restart 0 # Restart specific process id

pm2 delete 0 # Will remove process from pm2 list

pm2 delete all # Will remove all processes from pm2 list

# Misc

pm2 reset <process>    # Reset meta data (restarted time...)
pm2 updatePM2          # Update in memory pm2
pm2 ping               # Ensure pm2 daemon has been launched
pm2 sendSignal SIGUSR2 my-app # Send system signal to script
pm2 start app.js --no-daemon
pm2 start app.js --no-vizion
pm2 start app.js --no-autorestart

pm2 reset <process> # Reset meta data (restarted time...)

pm2 updatePM2 # Update in memory pm2

pm2 ping # Ensure pm2 daemon has been launched

pm2 sendSignal SIGUSR2 my-app # Send system signal to script

pm2 start app.js --no-daemon

pm2 start app.js --no-vizion

pm2 start app.js --no-autorestart

So, more understand about java process manager? Hoe you will understand how to use java process manager 2 or PM2

Java Process Manager 2 (PM2) Cheat Sheet

Java Process Manager 2 (PM2)

#Installation

#Start an app

# Specify an app name

# Watch and Restart app when files change

# Set memory threshold for app reload

# Specify log file

# Pass extra arguments to the script

# Delay between automatic restarts

# Prefix logs with time

# Do not auto restart app

# Specify cron for forced restart

# Attach to application log

#Managing processes

#List managed applications

#Display logs

#Terminal Based Dashboard

#Cluster mode

#Restart application on changes

#Updating PM2

CheatSheet Java Process Manager 2

# Fork mode

# Cluster mode

# Listing

# Logs

# Actions

# Misc

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#Installation

#Start an app

# Specify an app name

# Watch and Restart app when files change

# Set memory threshold for app reload

# Specify log file

# Pass extra arguments to the script

# Delay between automatic restarts

# Prefix logs with time

# Do not auto restart app

# Specify cron for forced restart

# Attach to application log

#Managing processes

#List managed applications

#Display logs

#Terminal Based Dashboard

#Cluster mode

#Restart application on changes

#Updating PM2

CheatSheet Java Process Manager 2

# Fork mode

# Cluster mode

# Listing

# Logs

# Actions

# Misc

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