서버 다운타임 기록 16.12.14

아리운 호스트
16.12.14일 11:37분에 다운되었습니다. 가장 먼저 문자를 받았습니다. ssh 원격 원격법 로그인, 아리운 컨트롤러, 로그인할 수 없습니다.CPU와 메모리를 보면 새 것이 없고 재부팅만 할 수 있습니다.
11:40분, 호스트 로그인, 메시지 보기
Dec 14 11:30:50 iZ258fuhh93Z systemd: Started Session 178481 of user root.Dec 14 11:30:50 iZ258fuhh93Z systemd: Starting Session 178481 of user root.Dec 14 11:30:51 iZ258fuhh93Z systemd: Started Session 178479 of user deploy.Dec 14 11:30:51 iZ258fuhh93Z systemd: Starting Session 178479 of user deploy.Dec 14 11:30:52 iZ258fuhh93Z systemd: Started Session 178480 of user deploy.Dec 14 11:30:57 iZ258fuhh93Z systemd: Starting Session 178480 of user deploy.Dec 14 11:33:41 iZ258fuhh93Z systemd-logind: Failed to start session scope session-178482.scope: Connection timed out (null)Dec 14 11:34:20 iZ258fuhh93Z systemd-logind: Failed to abandon session scope: Connection timed outDec 14 11:35:37 iZ258fuhh93Z crond: sendmail: fatal: parameter inet_interfaces: no local interface found for::1Dec 14 11:35:37 iZ258fuhh93Z systemd: Started Session 178485 of user deploy.Dec 14 11:35:37 iZ258fuhh93Z systemd: Starting Session 178485 of user deploy.Dec 14 11:35:37 iZ258fuhh93Z systemd: Failed to start Session 178482 of user deploy.Dec 14 11:35:37 iZ258fuhh93Z systemd: Failed to start Session 178483 of user deploy.Dec 14 11:35:37 iZ258fuhh93Z systemd: Started Session 178484 of user deploy.Dec 14 11:35:37 iZ258fuhh93Z systemd: Starting Session 178484 of user deploy.Dec 14 11:35:37 iZ258fuhh93Z systemd: Started Session 178486 of user deploy.Dec 14 11:35:37 iZ258fuhh93Z systemd: Starting Session 178486 of user deploy.Dec 14 11:36:35 iZ258fuhh93Z systemd-logind: Failed to abandon session scope: Connection timed outDec 14 11:36:59 iZ258fuhh93Z systemd: Started Session 178487 of user deploy.Dec 14 11:36:59 iZ258fuhh93Z systemd: Starting Session 178487 of user deploy.Dec 14 11:36:59 iZ258fuhh93Z crond: sendmail: fatal: parameter inet_interfaces: no local interface found for::1Dec 14 11:37:06 iZ258fuhh93Z crond: sendmail: fatal: parameter inet_interfaces: no local interface found for::1Dec 14 11:37:07 iZ258fuhh93Z systemd: Started Session 178488 of user deploy.Dec 14 11:37:07 iZ258fuhh93Z systemd: Starting Session 178488 of user deploy.Dec 14 11:37:13 iZ258fuhh93Z crond: sendmail: fatal: parameter inet_interfaces: no local interface found for::1Dec 14 11:37:13 iZ258fuhh93Z crond: sendmail: fatal: parameter inet_interfaces: no local interface found for::1Dec 14 11:39:34 iZ258fuhh93Z kernel: atkbd serio0: Unknown key released (translated set 2, code 0x0 on isa0060/serio0).Dec 14 11:39:34 iZ258fuhh93Z kernel: atkbd serio0: Use 'setkeycodes 00 ' to make it known.Dec 14 11:39:34 iZ258fuhh93Z kernel: atkbd serio0: Unknown key released (translated set 2, code 0x0 on isa0060/serio0).Dec 14 11:39:34 iZ258fuhh93Z kernel: atkbd serio0: Use 'setkeycodes 00 ' to make it known.Dec 14 11:39:34 iZ258fuhh93Z systemd: [email protected] has no holdoff time, scheduling restart.Dec 14 11:39:35 iZ258fuhh93Z systemd: Failed to fork: Cannot allocate memoryDec 14 11:39:35 iZ258fuhh93Z systemd: [email protected]: Supervising process 48 which is not our child. We'll most likely not notice when it exits.
Dec 14 11:39:39 iZ258fuhh93Z systemd: Started Session 178490 of user deploy.Dec 14 11:39:40 iZ258fuhh93Z systemd: Starting Session 178490 of user deploy.Dec 14 11:39:40 iZ258fuhh93Z systemd: Started Session 178489 of user deploy.Dec 14 11:39:40 iZ258fuhh93Z systemd: Starting Session 178489 of user deploy.Dec 14 11:40:53 iZ258fuhh93Z rsyslogd: [origin software="rsyslogd"swVersion="7.4.7"x-pid="471"x-info="http://www.rsyslog.com"] star
Dec 14 19:40:46 iZ258fuhh93Z journal: Runtime journal is using 8.0M (max allowed 189.5M, trying to leave 284.3M free of 1.8G available → current limit 189.5M).Dec 14 19:40:46 iZ258fuhh93Z kernel: Initializing cgroup subsys cpusetDec 14 19:40:46 iZ258fuhh93Z kernel: Initializing cgroup subsys cpuDec 14 19:40:46 iZ258fuhh93Z kernel: Initializing cgroup subsys cpuacct
>>>>>>> 다시 시작
Dec 14 19:40:46 iZ258fuhh93Z kernel: Linux version 3.10.0-327.10.1.el7.x86_64 ([email protected]) (gcc version 4.8.3 20140911 (Red Hat 4.8.3-9) (GCC) ) #1 SMPTue Feb 16 17:03:50 UTC 2016Dec 14 19:40:46 iZ258fuhh93Z kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-3.10.0-327.10.1.el7.x86_64 root=UUID=6634633e-001d-43ba-8fab-202f1df93339 ro crashkernel=auto vconsole.font=latarcyrheb-sun16 vconsole.keymap=us biosdevname=0 rhgb quiet LANG=en_US.UTF-8 net.ifnames=0Dec 14 19:40:46 iZ258fuhh93Z kernel: e820: BIOS-provided physical RAM map:Dec 14 19:40:46 iZ258fuhh93Z kernel: BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usableDec 14 19:40:46 iZ258fuhh93Z kernel: BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reservedDec 14 19:40:46 iZ258fuhh93Z kernel: BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
분석 로그에서 주요 문제는 메모리 소모입니다. ssh 링크 프로세스를 만들 수 없습니다. 어떤 서비스가 메모리를 소모하여 서버가 다운되었는지 생각할 수 있습니다.
이 문제는 어젯밤의 새로운 임무와 관련이 있을 가능성이 높아 구체적인 업무를 분석해야 한다.
그 다음에 매번cron작업에서 메일을 보내는 데 실패하는 문제가 있음을 발견하고 인터넷에서 해결 방안을 찾아 해결한다.

sendmail: fatal: parameter inet_interfaces: no local interface found for ::1

IPv6와 관련이 있기 때문에 해결 방법은postfix가 IPv4만 사용하도록 하는 것이다.
파일 열기:/etc/postfix/main.cf
손잡이

inet_protocols = all

바꾸다

inet_protocols = ipv4

끝나고 실행하겠습니다.

service postfix restart