데이터 이동 후 MySQL이 시작되지 않습니다. 양말 파일이 누락되었습니다.

2024-6-28 • tag-icon

데이터 이동 후 MySQL이 시작되지 않습니다. 양말 파일이 누락되었습니다.

Ubuntu 16.04를 새로 설치하고 mysql을 새로 설치할 때 다음과 비슷한 방식으로 mysql 데이터를 이동했습니다.이것그러나 그 후에 mysql을 다시 시작/시작하려고 하면 다음과 같은 결과가 나타납니다.

error: can't connect to local MySQL server throught socket '/var/run/mysqld/mysql.sock' (2) 
Check that mysqld is running and that the socket: '/var/run/mysqld/mysql.sock' exists!

/var/run/mysqld 폴더는 존재하지만 파일은 존재하지 않습니다.

내가 실행할 때 : find / -type smysql.sock 파일이 목록에 없습니다.

결과 journalctl -xe:

-- Unit mysql.service has finished shutting down.
Jun 12 11:45:16 wkssop-hev7 systemd[1]: Starting MySQL Community Server...
-- Subject: Unit mysql.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

-- Unit mysql.service has begun starting up.
Jun 12 11:45:16 wkssop-hev7 audit[5882]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/5882/status" pid=5882 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=110 ouid=110
Jun 12 11:45:16 wkssop-hev7 audit[5882]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/sys/devices/system/node/" pid=5882 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=110 ouid=0
Jun 12 11:45:16 wkssop-hev7 audit[5882]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/5882/status" pid=5882 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=110 ouid=110
Jun 12 11:45:16 wkssop-hev7 kernel: audit: type=1400 audit(1497260716.044:133): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/5882/status" pid=5882 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=110 ouid=110
Jun 12 11:45:16 wkssop-hev7 kernel: audit: type=1400 audit(1497260716.044:134): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/sys/devices/system/node/" pid=5882 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=110 ouid=0
Jun 12 11:45:16 wkssop-hev7 kernel: audit: type=1400 audit(1497260716.044:135): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/5882/status" pid=5882 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=110 ouid=110
Jun 12 11:45:17 wkssop-hev7 systemd[1]: mysql.service: Main process exited, code=exited, status=1/FAILURE

결과는 systemctl status mysql.service다음과 같습니다.

● mysql.service - MySQL Community Server
   Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)
   Active: activating (start-post) (Result: exit-code) since Mon 2017-06-12 11:45:46 CEST; 6s ago
  Process: 5986 ExecStart=/usr/sbin/mysqld (code=exited, status=1/FAILURE)
  Process: 5978 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exited, status=0/SUCCESS)
 Main PID: 5986 (code=exited, status=1/FAILURE);         : 5987 (mysql-systemd-s)
    Tasks: 2
   Memory: 1.4M
      CPU: 259ms
   CGroup: /system.slice/mysql.service
           └─control
             ├─5987 /bin/bash /usr/share/mysql/mysql-systemd-start post
             └─6029 sleep 1

Jun 12 11:45:46 wkssop-hev7 systemd[1]: Starting MySQL Community Server...
Jun 12 11:45:48 wkssop-hev7 systemd[1]: mysql.service: Main process exited, code=exited, status=1/FAILURE

이것은 기본적으로 내가 따르는 단계입니다.

if ! service mysql stop ; then
   echo "ignoring failure to stop mysql"
fi

cp config/my.cnf /etc/mysql/my.cnf
mkdir -p /data/mysqldata
chmod 777 /data/mysqldata
cp -R -p /var/lib/mysql/* /data/mysqldata

sed "s/\/var\/lib\/mysql/\/data\/mysqldata/g" /etc/apparmor.d/usr.sbin.mysqld > tmp
mv tmp /etc/apparmor.d/usr.sbin.mysqld
apparmor_parser -r /etc/apparmor.d/usr.sbin.mysqld
/etc/init.d/apparmor reload
service mysql restart

마지막 단계인 서비스를 다시 시작하면 오류가 발생하는데 그렇게 할 수 없습니다.

또한 mysql apparmor 프로필에 /sys/devices/system/node/ r 및 /sys/devices/system/node/** r을 추가했는데, 거기에 없는 것이 버그인 것 같았기 때문입니다.https://bugs.launchpad.net/ubuntu/+source/mysql-5.7/+bug/1658233

하지만 이제는 /proc/####/status로 동일한 작업을 수행해야 하는지 궁금합니다. 실제로는 /proc여야 할까요? 그래서 시도해볼 수도 있겠지만 여전히 실패합니다.

journatlctl -xe | tail -30:

-- Subject: Unit mysql.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit mysql.service has begun starting up.
Jun 14 13:28:50 minint-l35opp1 systemd[1]: mysql.service: Main process exited, code=exited, status=1/FAILURE
Jun 14 13:29:18 minint-l35opp1 systemd[1]: Failed to start MySQL Community Server.
-- Subject: Unit mysql.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit mysql.service has failed.
-- 
-- The result is failed.
Jun 14 13:29:18 minint-l35opp1 systemd[1]: mysql.service: Unit entered failed state.
Jun 14 13:29:18 minint-l35opp1 systemd[1]: mysql.service: Failed with result 'exit-code'.
Jun 14 13:29:18 minint-l35opp1 systemd[1]: mysql.service: Service hold-off time over, scheduling restart.
Jun 14 13:29:18 minint-l35opp1 systemd[1]: Stopped MySQL Community Server.
-- Subject: Unit mysql.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit mysql.service has finished shutting down.
Jun 14 13:29:18 minint-l35opp1 systemd[1]: Starting MySQL Community Server...
-- Subject: Unit mysql.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit mysql.service has begun starting up.
Jun 14 13:29:20 minint-l35opp1 systemd[1]: mysql.service: Main process exited, code=exited, status=1/FAILURE

답변1

내가 받은 마지막 오류로 인해 다음과 같은 결과가 나왔습니다.https://askubuntu.com/a/792857/693474답변... 내 문제가 해결되었습니다. 새로 설치한 이후로 왜 이 두 매개변수가 어디에 있는지 알 수 없나요?

답변1

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