프로세스 관리 ⚙️ ▻ pm2
September 11, 2019
💎 목차
⚙️ 설치를 하며
$ npm install pm2 -g😳 명령어 보며
▸ pm2 -v
$ pm2 -v
3.5.1pm2 버전 확인
▸ pm2 start <id|name>
$ pm2 start ./bin/www
[PM2] Starting /Users/apple/Desktop/pm2/bin/www in fork_mode (1 instance)
[PM2] Done.
┌──────────┬────┬─────────┬──────┬──────┬────────┬─────────┬────────┬─────┬──────────┬───────┬──────────┐
│ App name │ id │ version │ mode │ pid │ status │ restart │ uptime │ cpu │ mem │ user │ watching │
├──────────┼────┼─────────┼──────┼──────┼────────┼─────────┼────────┼─────┼──────────┼───────┼──────────┤
│ www │ 0 │ 0.0.0 │ fork │ 8369 │ online │ 0 │ 0s │ 0% │ 9.2 MB │ apple │ disabled │
└──────────┴────┴─────────┴──────┴──────┴────────┴─────────┴────────┴─────┴──────────┴───────┴──────────┘프로세스 실행
▸ pm2 stop <id|name>
$ pm2 stop www
[PM2] Applying action stopProcessId on app [www](ids: 0)
[PM2] [www](0) ✓
┌──────────┬────┬─────────┬──────┬─────┬─────────┬─────────┬────────┬─────┬────────┬───────┬──────────┐
│ App name │ id │ version │ mode │ pid │ status │ restart │ uptime │ cpu │ mem │ user │ watching │
├──────────┼────┼─────────┼──────┼─────┼─────────┼─────────┼────────┼─────┼────────┼───────┼──────────┤
│ www │ 0 │ 0.0.0 │ fork │ 0 │ stopped │ 0 │ 0 │ 0% │ 0 B │ apple │ disabled │
└──────────┴────┴─────────┴──────┴─────┴─────────┴─────────┴────────┴─────┴────────┴───────┴──────────┘프로세스 중지
▸ pm2 restart <id|name>
$ pm2 restart www
Use --update-env to update environment variables
[PM2] Applying action restartProcessId on app [www](ids: 0)
[PM2] [www](0) ✓
┌──────────┬────┬─────────┬──────┬──────┬────────┬─────────┬────────┬─────┬──────────┬───────┬──────────┐
│ App name │ id │ version │ mode │ pid │ status │ restart │ uptime │ cpu │ mem │ user │ watching │
├──────────┼────┼─────────┼──────┼──────┼────────┼─────────┼────────┼─────┼──────────┼───────┼──────────┤
│ www │ 0 │ 0.0.0 │ fork │ 8477 │ online │ 1 │ 0s │ 0% │ 6.7 MB │ apple │ disabled │
└──────────┴────┴─────────┴──────┴──────┴────────┴─────────┴────────┴─────┴──────────┴───────┴──────────┘프로세스 재시작
▸ pm2 delete <id|name>
$ pm2 delete www
[PM2] Applying action deleteProcessId on app [www](ids: 0)
[PM2] [www](0) ✓
┌──────────┬────┬─────────┬──────┬─────┬────────┬─────────┬────────┬─────┬─────┬──────┬──────────┐
│ App name │ id │ version │ mode │ pid │ status │ restart │ uptime │ cpu │ mem │ user │ watching │
└──────────┴────┴─────────┴──────┴─────┴────────┴─────────┴────────┴─────┴─────┴──────┴──────────┘프로세스 제거
▸ pm2 list
$ pm2 list
┌──────────┬────┬─────────┬──────┬──────┬────────┬─────────┬────────┬──────┬───────────┬───────┬──────────┐
│ App name │ id │ version │ mode │ pid │ status │ restart │ uptime │ cpu │ mem │ user │ watching │
├──────────┼────┼─────────┼──────┼──────┼────────┼─────────┼────────┼──────┼───────────┼───────┼──────────┤
│ www │ 0 │ 0.0.0 │ fork │ 8553 │ online │ 2 │ 26s │ 0.1% │ 37.4 MB │ apple │ disabled │
└──────────┴────┴─────────┴──────┴──────┴────────┴─────────┴────────┴──────┴───────────┴───────┴──────────┘프로세스 목록
▸ pm2 show <id|name>
$ pm2 show www
Describing process with id 0 - name www
┌───────────────────┬──────────────────────────────────────┐
│ status │ online │
│ name │ www │
│ version │ 0.0.0 │
│ restarts │ 2 │
│ uptime │ 58s │
│ script path │ /Users/apple/Desktop/pm2/bin/www │
│ script args │ N/A │
│ error log path │ /Users/apple/.pm2/logs/www-error.log │
│ out log path │ /Users/apple/.pm2/logs/www-out.log │
│ pid path │ /Users/apple/.pm2/pids/www-0.pid │
│ interpreter │ node │
│ interpreter args │ N/A │
│ script id │ 0 │
│ exec cwd │ /Users/apple/Desktop/pm2 │
│ exec mode │ fork_mode │
│ node.js version │ 10.16.0 │
│ node env │ N/A │
│ watch & reload │ ✘ │
│ unstable restarts │ 0 │
│ created at │ 2019-09-11T05:44:28.964Z │
└───────────────────┴──────────────────────────────────────┘
Actions available
┌────────────────────────┐
│ km:heapdump │
│ km:cpu:profiling:start │
│ km:cpu:profiling:stop │
│ km:heap:sampling:start │
│ km:heap:sampling:stop │
└────────────────────────┘
Trigger via: pm2 trigger www <action_name>
Code metrics value
┌────────────────────────┬───────────┐
│ Heap Size │ 14.73 MiB │
│ Heap Usage │ 66.85 % │
│ Used Heap Size │ 9.85 MiB │
│ Active requests │ 0 │
│ Active handles │ 4 │
│ Event Loop Latency │ 2.22 ms │
│ Event Loop Latency p95 │ 5.70 ms │
└────────────────────────┴───────────┘
Divergent env variables from local env
Add your own code metrics: http://bit.ly/code-metrics
Use `pm2 logs www [--lines 1000]` to display logs
Use `pm2 env 0` to display environement variables
Use `pm2 monit` to monitor CPU and Memory usage www프로세스 상세 조회
▸ pm2 log
$ pm2 log
[TAILING] Tailing last 15 lines for [all] processes (change the value with --lines option)
/Users/apple/.pm2/pm2.log last 15 lines:
PM2 | 2019-09-11T14:42:42: PM2 log: App [www:0] exited with code [0] via signal [SIGINT]
PM2 | 2019-09-11T14:42:42: PM2 log: pid=8369 msg=process killed
PM2 | 2019-09-11T14:43:39: PM2 log: App [www:0] starting in -fork mode-
PM2 | 2019-09-11T14:43:39: PM2 log: App [www:0] online
PM2 | 2019-09-11T14:43:45: PM2 log: Stopping app:www id:0
PM2 | 2019-09-11T14:43:45: PM2 log: App [www:0] exited with code [0] via signal [SIGINT]
PM2 | 2019-09-11T14:43:45: PM2 log: pid=8468 msg=process killed
PM2 | 2019-09-11T14:43:45: PM2 log: App [www:0] starting in -fork mode-
PM2 | 2019-09-11T14:43:45: PM2 log: App [www:0] online
PM2 | 2019-09-11T14:44:28: PM2 log: Process 0 in a stopped status, starting it
PM2 | 2019-09-11T14:44:28: PM2 log: Stopping app:www id:0
PM2 | 2019-09-11T14:44:28: PM2 log: App [www:0] exited with code [0] via signal [SIGINT]
PM2 | 2019-09-11T14:44:29: PM2 log: pid=8477 msg=process killed
PM2 | 2019-09-11T14:44:29: PM2 log: App [www:0] starting in -fork mode-
PM2 | 2019-09-11T14:44:29: PM2 log: App [www:0] online
/Users/apple/.pm2/logs/www-out.log last 15 lines:
/Users/apple/.pm2/logs/www-error.log last 15 lines:프로세스 로그파일 확인
▸ pm2 log <id|name>
$ pm2 log www
[TAILING] Tailing last 15 lines for [www] process (change the value with --lines option)
/Users/apple/.pm2/logs/www-out.log last 15 lines:
/Users/apple/.pm2/logs/www-error.log last 15 lines:특정 프로세스의 로그파일 확인
▸ pm2 flush
$ pm2 flush
[PM2] Flushing /Users/apple/.pm2/pm2.log
[PM2] Flushing:
[PM2] /Users/apple/.pm2/logs/www-out.log
[PM2] /Users/apple/.pm2/logs/www-error.log
[PM2] Logs flushed로그파일 삭제
▸ pm2 monit
┌─ Process list ──────────────────────────────────────┐┌─ Global Logs ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
│[ 0] www Mem: 30 MB CPU: 0 % online ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
│ ││ │
└─────────────────────────────────────────────────────┘└────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
┌─ Custom metrics (http://bit.ly/code-metrics) ───────┐┌─ Metadata ─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
│ Heap Size 13.23 ││ App Name www │
│ Heap Usage 66.42 ││ Version 0.0.0 │
│ Used Heap Size 8.79 ││ Restarts 2 │
│ Active requests 0 ││ Uptime 3m │
│ Active handles 4 ││ Script path /Users/apple/Desktop/pm2/bin/www │
│ Event Loop Latency 2.13 ││ Script args N/A │
│ Event Loop Latency p95 5.54 ││ Interpreter node │
│ ││ Interpreter args N/A │
│ ││ Exec mode fork │
│ ││ Node.js version 10.16.0 │
│ ││ watch & reload ✘ │
└─────────────────────────────────────────────────────┘└────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
left/right: switch boards | up/down/mouse: scroll | Ctrl-C: exit To go further check out https://pm2.io/프로세스 실시간 모니터링
🤔 생각해 보며
▸ Cluster Mode
$ pm2 start ./bin/www -i 2
[PM2] Starting /Users/apple/Desktop/pm2/bin/www in cluster_mode (2 instances)
[PM2] Done.
┌──────────┬────┬─────────┬─────────┬──────┬────────┬─────────┬────────┬─────┬───────────┬───────┬──────────┐
│ App name │ id │ version │ mode │ pid │ status │ restart │ uptime │ cpu │ mem │ user │ watching │
├──────────┼────┼─────────┼─────────┼──────┼────────┼─────────┼────────┼─────┼───────────┼───────┼──────────┤
│ www │ 0 │ 0.0.0 │ cluster │ 8888 │ online │ 0 │ 0s │ 0% │ 32.7 MB │ apple │ disabled │
│ www │ 1 │ 0.0.0 │ cluster │ 8889 │ online │ 0 │ 0s │ 0% │ 25.2 MB │ apple │ disabled │
└──────────┴────┴─────────┴─────────┴──────┴────────┴─────────┴────────┴─────┴───────────┴───────┴──────────┘클러스터 모드로 CPU를 최대한 활용
-i 옵션은 클러스터 모드로 실행하며 뒤에 인스턴스 개수를 지정 가능
0을 지정할 경우 사용 가능한 CPU 개수만큼 실행
▸ pm2 reload <id|name>
$ pm2 reload www
Use --update-env to update environment variables
[PM2] Applying action reloadProcessId on app [www](ids: 0,1)
[PM2] [www](0) ✓
[PM2] [www](1) ✓클러스터 모드에 사용할 경우 다운타임 없이 서버를 재기동할 수 있다.
▸ Ecosystem File
$ pm2 ecosystempm2 설정 파일 생성
ecosystem.cofing.js
name 실행한 프로세스 이름
script 실행할 파일 경로
watch 파일 변경시 자동으로 재실행 여부 (true, false)
exec_mode 실행 모드 (cluster, fork)
instances cluster로 실행시 인스턴스 개수
env 환경변수로 PORT, NODE_ENV 같은 precess.env.{} 설정
# NODE_ENV=production
$ pm2 start ecosystem.cofing.js
# NODE_ENV=development
$ pm2 start ecosystem.cofing.js --env development출처
![[AGUMON]](/static/eed0671fc085e3aa8976bcf405f9b59d/9d183/profile.jpg)