MySQL and MariaDB

dleh

Hej Everyone

i run into a problem. I (tried to) install mysql, but everytime i try to start it i end up with the following:

$ mysql -u root-p                 
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/run/mysqld/mysqld.sock' (2 "No such file or directory")

i went into the directory and there is no such file. I then tried to run a search :

$ sudo find / -type s

and it seems that I’m missing the file its not in any directory as far as i can tell.

i then tried to re-install mysql (version 5.5 ; 5.6 and 5.7) and mariaDBbut no difference as far as i can tell.

hope anybody can help me

pseudonym

Hi,

this is because of:

Note: For security reasons, the systemd service file contains ProtectHome=true, which prevents MariaDB from accessing files under the /home, /root and /run/user hierarchies. The datadir has to be in an accessible location and owned by the mysql user and group. You can modify this behavior by creating a supplementary service file as described here: https://mariadb.com/kb/en/mariadb/systemd/

So just do following:

sudo pacman -S mariadb

sudo mysql_install_db --user=mysql --basedir=/usr --datadir=/var/lib/mysql

sudo systemctl enable mariadb.service

sudo systemctl start mariadb.service

and then

mysql -u root -p

will work

dleh

@pseudonym

Hi Thank you for your fast response, i tried the Commands you wrote and end up with:

$ sudo systemctl start mariadb.service
Job for mariadb.service failed because the control process exited with error code.
See "systemctl status mariadb.service" and "journalctl -xe" for details.

I tried:

$ systemctl status mariadb.service  
● mariadb.service - MariaDB 10.1.30 database server
   Loaded: loaded (/usr/lib/systemd/system/mariadb.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Tue 2018-01-30 14:53:44 CET; 2min 27s ago
     Docs: man:mysqld(8)
           https://mariadb.com/kb/en/library/systemd/
  Process: 1672 ExecStart=/usr/bin/mysqld $MYSQLD_OPTS $_WSREP_NEW_CLUSTER $_WSREP_START_POSI
  Process: 1620 ExecStartPre=/bin/sh -c [ ! -e /usr/bin/galera_recovery ] && VAR= ||   VAR=`/
  Process: 1619 ExecStartPre=/bin/sh -c systemctl unset-environment _WSREP_START_POSITION (co
 Main PID: 1672 (code=exited, status=1/FAILURE)
   Status: "MariaDB server is down"

Jan 30 14:53:43 ThinkPad systemd[1]: Starting MariaDB 10.1.30 database server...
Jan 30 14:53:44 ThinkPad mysqld[1672]: 2018-01-30 14:53:44 140624647430080 [Note] /usr/bin/my
Jan 30 14:53:44 ThinkPad mysqld[1672]: 2018-01-30 14:53:44 140624647430080 [ERROR] mysqld: Fi
Jan 30 14:53:44 ThinkPad mysqld[1672]: 2018-01-30 14:53:44 140624647430080 [ERROR] Aborting
Jan 30 14:53:44 ThinkPad systemd[1]: mariadb.service: Main process exited, code=exited, statu
Jan 30 14:53:44 ThinkPad systemd[1]: mariadb.service: Failed with result 'exit-code'.
Jan 30 14:53:44 ThinkPad systemd[1]: Failed to start MariaDB 10.1.30 database server.

Then i tried running:

$ mysql -u root -p
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/run/mysqld/mysqld.sock' (2 "No such file or directory")

i dont get whats wrong

pseudonym

Hi

this one worked?

sudo mysql_install_db --user=mysql --basedir=/usr --datadir=/var/lib/mysql

Without it is not possible to start the service

dleh

oh no it didn’t, i got:

Installing MariaDB/MySQL system tables in '/var/lib/mysql' ...
2018-01-30 15:03:55 140493537816512 [Note] /usr/bin/mysqld (mysqld 10.1.30-MariaDB) starting as process 2297 ...
2018-01-30 15:03:55 140493537816512 [ERROR] mysqld: File './mysql-bin.index' not found (Errcode: 13 "Permission denied")
2018-01-30 15:03:55 140493537816512 [ERROR] Aborting


Installation of system tables failed!  Examine the logs in
/var/lib/mysql for more information.

The problem could be conflicting information in an external
my.cnf files. You can ignore these by doing:

    shell> /usr/bin/mysql_install_db --defaults-file=~/.my.cnf

You can also try to start the mysqld daemon with:

    shell> /usr/bin/mysqld --skip-grant --general-log &

and use the command line tool /usr/bin/mysql
to connect to the mysql database and look at the grant tables:

    shell> /usr/bin/mysql -u root mysql
    mysql> show tables;

Try 'mysqld --help' if you have problems with paths.  Using
--general-log gives you a log in /var/lib/mysql that may be helpful.

The latest information about mysql_install_db is available at
https://mariadb.com/kb/en/installing-system-tables-mysql_install_db
MariaDB is hosted on launchpad; You can find the latest source and
email lists at http://launchpad.net/maria

Please check all of the above before submitting a bug report
at http://mariadb.org/jira

sorry totally overlooked that

pseudonym

ok, lets try

sudo systemctl stop mariadb.service

sudo systemctl disable mariadb.service

sudo mysql_install_db --user=mysql --basedir=/usr --datadir=/var/lib/mysql

if it is woriking then you can start and enabled it.

If its not working we should start all over.

dleh

I now tried

$ /usr/bin/mysqld --skip-grant --general-log & [1] 2841

2018-01-30 15:12:46 140400040034240 [Note] Using unique option prefix 'skip-grant' is error-prone and can break in the future. Please use the full name 'skip-grant-tables' instead.
2018-01-30 15:12:46 140400040034240 [Note] /usr/bin/mysqld (mysqld 10.1.30-MariaDB) starting as process 2841 ...
2018-01-30 15:12:46 140400040034240 [Warning] Can't create test file /var/lib/mysql/ThinkPad.lower-test
/usr/bin/mysqld: Can't change dir to '/var/lib/mysql/' (Errcode: 13 "Permission denied")
2018-01-30 15:12:46 140400040034240 [ERROR] Aborting


[1]  + 2841 exit 1     /usr/bin/mysqld --skip-grant --general-log

dleh

@pseudonym said in MySQL and MariaDB:

[email protected]:~|⇒  sudo systemctl disable mariadb.service

Removed /etc/systemd/system/multi-user.target.wants/mariadb.service.

[email protected]:~|⇒  sudo mysql_install_db --user=mysql --basedir=/usr --datadir=/var/lib/mysql
Installing MariaDB/MySQL system tables in '/var/lib/mysql' ...
2018-01-30 15:24:30 139675200880576 [Note] /usr/bin/mysqld (mysqld 10.1.30-MariaDB) starting as process 4112 ...
2018-01-30 15:24:30 139675200880576 [ERROR] mysqld: File './mysql-bin.index' not found (Errcode: 13 "Permission denied")
2018-01-30 15:24:30 139675200880576 [ERROR] Aborting


Installation of system tables failed!  Examine the logs in
/var/lib/mysql for more information.

The problem could be conflicting information in an external
my.cnf files. You can ignore these by doing:

    shell> /usr/bin/mysql_install_db --defaults-file=~/.my.cnf

You can also try to start the mysqld daemon with:

    shell> /usr/bin/mysqld --skip-grant --general-log &

and use the command line tool /usr/bin/mysql
to connect to the mysql database and look at the grant tables:

    shell> /usr/bin/mysql -u root mysql
    mysql> show tables;

Try 'mysqld --help' if you have problems with paths.  Using
--general-log gives you a log in /var/lib/mysql that may be helpful.

The latest information about mysql_install_db is available at
https://mariadb.com/kb/en/installing-system-tables-mysql_install_db
MariaDB is hosted on launchpad; You can find the latest source and
email lists at http://launchpad.net/maria

Please check all of the above before submitting a bug report
at http://mariadb.org/jira

so back to scratch

pseudonym

you also stoped the service?

If yes, lets start all over with:

sudo systemctl stop mariadb.service

sudo systemctl disable mariadb.service

sudo pacman -Rsnc mariadb

Search for mysql in usr and var and delete it.
Then do it again in the following order as i wrote in my firts post.

dleh

Hi i Run the three commands, afterwards i removed all files related to mysql and Mariadb. I restarted my system and run the commands i the second post and got this

[email protected]:~|⇒  mysql -u root -p                   
zsh: command not found: mysql
[email protected]:~|⇒  mysqld -u root -p
2018-01-30 15:46:13 140248983281600 [Note] mysqld (mysqld 10.1.30-MariaDB) starting as process 6060 ...
2018-01-30 15:46:13 140248983281600 [Warning] Can't create test file /var/lib/mysql/ThinkPad.lower-test
mysqld: Can't change dir to '/var/lib/mysql/' (Errcode: 13 "Permission denied")
2018-01-30 15:46:13 140248983281600 [ERROR] Aborting

pseudonym

hm thats strange. Here it works out of the box. I also reinstalled it.

The command is without “d”.

sudo mysql -u root -p

Would you post the output?

sudo systemctl status mariadb.service

dleh

Hi sorry for my absents, I wanted to restart my system … but i won’t start anymore so I will reinstall Antergos and see if it’ll fix my problem… Anyhow thank you so much for your help!!