My mySQL server on CentOS has been working correctly, but, I am unable to restart mysqld suddenly today.
1) # /etc/rc.d/init.d/mysqld start
shows [failed]
2) see the log
tail /var/log/mysqld.log
.
.
mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
3) manually put
/usr/bin/mysqld_safe
151129 15:54:36 mysqld_safe Logging to '/var/log/mysqld.log'.
151129 15:54:37 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
151129 15:54:37 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
4)check config
less /etc/my.cnf
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Recommended in standard MySQL setup
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
5)check mysql directory,every owner ship is belonging to mysql. However I can't fine mysql.sock (this is set in my.cnf)
cd /var/lib/mysql
ls -la
drwxr-xr-x 5 mysql mysql 4096 11月 29 15:54 2015 .
drwxr-xr-x 21 root root 4096 6月 2 06:09 2015 ..
-rw-rw---- 1 mysql mysql 56 6月 2 05:42 2015 auto.cnf
drwx------ 2 mysql mysql 4096 11月 24 11:12 2015 myapp
-rw-rw---- 1 mysql mysql 50331648 11月 29 12:30 2015 ib_logfile0
-rw-rw---- 1 mysql mysql 50331648 11月 29 12:30 2015 ib_logfile1
-rw-rw---- 1 mysql mysql 79691776 11月 29 12:30 2015 ibdata1
drwx------ 2 mysql mysql 4096 6月 2 05:42 2015 mysql
drwx------ 2 mysql mysql 4096 6月 2 05:42 2015 performance_schema
6) I found there is no mysql.sock in /var/lib/mysql directory, then I try this for test purpose.
touch /var/lib/mysql/mysql.sock
try to restart
/etc/rc.d/init.d/mysqld start
somehow mysql.sock is deleted.
Is there any other things I can try??
I googled around and try.
restorecon -r /var/lib/mysql
it works for me. Thanks.