서버 설치 후 CPU, Memory, I/O 차트 표시되지 않음

CPU, Memory, I/O 와 같은 시스템 정보는 orange.system이 수행합니다. 

 

orange.system 확인

systemctl status orange.system
● orange.system.service - Orange system daemon
     Loaded: loaded (/etc/systemd/system/orange.system.service; enabled; vendor preset: enabled)
     Active: active (running) since Thu 2024-05-02 14:16:18 KST; 12min ago
   Main PID: 909 (python3)
      Tasks: 4 (limit: 37823)
     Memory: 36.4M
        CPU: 7.736s
     CGroup: /system.slice/orange.system.service
             └─909 /usr/bin/python3 /home/@server/system.py

May 02 14:29:04 theclient python3[909]:     ret = app.redis.get(rkey)
May 02 14:29:04 theclient python3[909]:   File "/home/orange/.local/lib/python3.10/site-packages/redis/commands/core.py", line 1830, in get
May 02 14:29:04 theclient python3[909]:     return self.execute_command("GET", name)
May 02 14:29:04 theclient python3[909]:   File "/home/orange/.local/lib/python3.10/site-packages/redis/client.py", line 542, in execute_command
May 02 14:29:04 theclient python3[909]:     conn = self.connection or pool.get_connection(command_name, **options)
May 02 14:29:04 theclient python3[909]:   File "/home/orange/.local/lib/python3.10/site-packages/redis/connection.py", line 1109, in get_connection
May 02 14:29:04 theclient python3[909]:     connection.connect()
May 02 14:29:04 theclient python3[909]:   File "/home/orange/.local/lib/python3.10/site-packages/redis/connection.py", line 282, in connect
May 02 14:29:04 theclient python3[909]:     raise ConnectionError(self._error_message(e))
May 02 14:29:04 theclient python3[909]: redis.exceptions.ConnectionError: Error 111 connecting to 127.0.0.1:6379. Connection refused.

 

redis 서버 접속 불가이니 redis 서버 상태확인

 

root@theclient:/var/log/redis# systemctl status redis
× redis-server.service - Advanced key-value store
     Loaded: loaded (/lib/systemd/system/redis-server.service; enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Thu 2024-05-02 14:16:20 KST; 23min ago
       Docs: http://redis.io/documentation,
             man:redis-server(1)
    Process: 1056 ExecStart=/usr/bin/redis-server /etc/redis/redis.conf --supervised systemd --daemonize no (code=exited, status=1/FAILURE)
   Main PID: 1056 (code=exited, status=1/FAILURE)
        CPU: 73ms

May 02 14:16:20 theclient systemd[1]: redis-server.service: Scheduled restart job, restart counter is at 5.
May 02 14:16:20 theclient systemd[1]: Stopped Advanced key-value store.
May 02 14:16:20 theclient systemd[1]: redis-server.service: Start request repeated too quickly.
May 02 14:16:20 theclient systemd[1]: redis-server.service: Failed with result 'exit-code'.
May 02 14:16:20 theclient systemd[1]: Failed to start Advanced key-value store.

 

redis 서버 구동 직 후 종료된 원인을 파악하기 위해 redis log 확인

/var/log/redis

45978:M 29 Apr 2024 04:33:52.528 # Server initialized
45978:M 29 Apr 2024 04:33:52.528 # WARNING overcommit_memory is set to 0! 

Background save may fail under low memory condition. 
To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or 
run the command 'sysctl vm.overcommit_memory=1' for this to take effect.


45978:M 29 Apr 2024 04:33:52.528 * Ready to accept connections
45978:signal-handler (1714612496) Received SIGTERM scheduling shutdown...
45978:M 02 May 2024 01:14:56.506 # User requested shutdown...
45978:M 02 May 2024 01:14:56.506 * Saving the final RDB snapshot before exiting.
45978:M 02 May 2024 01:14:56.507 * DB saved on disk
45978:M 02 May 2024 01:14:56.507 * Removing the pid file.
45978:M 02 May 2024 01:14:56.507 # Redis is now ready to exit, bye bye...

 

redis.conf의 수정된 무엇이 문제를 일으킨 것인데 변경된 부분이 무엇인지 확실하지 않아 잘 동작하는 서버의 redis.conf로 교체 후 정상 동작. 

 

문제가 된 redis.conf는 /etc/redis/redis.conf.failed로 백업 받아 놓음. 

 

redis 구동 확인

root@theclient:/etc/redis# systemctl status redis-server
● redis-server.service - Advanced key-value store
     Loaded: loaded (/lib/systemd/system/redis-server.service; enabled; vendor preset: enabled)
     Active: active (running) since Thu 2024-05-02 15:03:00 KST; 4min 54s ago
       Docs: http://redis.io/documentation,
             man:redis-server(1)
   Main PID: 9566 (redis-server)
     Status: "Ready to accept connections"
      Tasks: 5 (limit: 37823)
     Memory: 3.0M
        CPU: 497ms
     CGroup: /system.slice/redis-server.service

 

orange.system 

root@theclient:/etc/redis# systemctl status orange.system
● orange.system.service - Orange system daemon
     Loaded: loaded (/etc/systemd/system/orange.system.service; enabled; vendor preset: enabled)
     Active: active (running) since Thu 2024-05-02 15:09:09 KST; 5s ago
   Main PID: 11786 (python3)
      Tasks: 4 (limit: 37823)
     Memory: 32.5M
        CPU: 366ms
     CGroup: /system.slice/orange.system.service
             └─11786 /usr/bin/python3 /home/@server/system.py

May 02 15:09:09 theclient systemd[1]: Started Orange system daemon.

 

CPU, Memory, I/O Chart 생성됨

 

*

 

 

그나저나 warning이 발생된 vm.overcommit_memory 가 뭘까요?

 

vm.overcommit에 대한 짧은 이야기 (brunch.co.kr)

vm.overcommit에 대한 짧은 이야기

 

읽어보니

 

그냥 시스템 기본 값 그대로 사용하겠습니다.