While creating multiple mysql servers on same ubuntu machine under EC2 instance on AWS.I successfully created /var/lib/mysql2 , /var/log/mysql2 ,/etc/mysql2/
done desired changes in my.cnf file(under /etc/mysql2/ which i created by just copying /etc/mysql/ content) along with desired rights to mysql user
(Reference used to do the needful :--
- http://www.ducea.com/2009/01/19/running-multiple-instances-of-mysql-on-the-same-machine/
)
After running the following
sed -i 's/3306/3307/g' my.cnf
sed -i 's/mysqld.sock/mysqld2.sock/g' my.cnf
sed -i 's/mysqld.pid/mysqld2.pid/g' my.cnf
sed -i 's/var\/lib\/mysql/var\/lib\/mysql2/g' my.cnf
sed -i 's/var\/log\/mysql/var\/log\/mysql2/g' my.cnf
Proceeded by running the following command where i am getting error
mysql_install_db --user=mysql --datadir=/var/lib/mysql2/
Error:--->
FATAL ERROR: Could not find my-default.cnf file in my system and found the path
If you compiled from source, you need to run 'make install' to
copy the software into the correct location ready for operation.
If you are using a binary release, you must either be at the top
level of the extracted archive, or pass the --basedir option
pointing to that location.
I tried to do the following but in vain
sudo mysql_install_db --user=mysql --datadir=/var/lib/mysql2/ --basedir=/usr/share/doc/mysql-server-5.6/examples/
FATAL ERROR: Could not find /fill_help_tables.sql
If you compiled from source, you need to run 'make install' to
copy the software into the correct location ready for operation.
If you are using a binary release, you must either be at the top
level of the extracted archive, or pass the --basedir option
pointing to that location.
Please help in resolving the issue.I have installed MySQL server 5.6 and want to use the same version for my another instance on 3307 port
Related
I've been trying to install mysql using WSL and I've followed the steps indicated in this guide https://learn.microsoft.com/en-us/windows/wsl/tutorials/wsl-database. I tried running mysql --version and it worked (prompted mysql Ver 8.0.23 for Linux on x86_64 (MySQL Community Server - GPL)). But as I try the next command sudo /etc/init.d/mysql start, it says sudo: /etc/init.d/mysql: command not found. I've also tried checking the contents of /etc/init.d/ directory and there is no existing mysql file/folder there. What should I do next to proceed with my mysql installation?
Thanks!
There is a great blog post on this problem, with explanations of the issue and detailed solutions.
https://www.58bits.com/blog/2020/05/03/installing-mysql-80-under-wsl-2-and-ubuntu
From the post:
One solution is to download the mysql.server.sh script from here -
https://github.com/mysql/mysql-server/tree/8.0/support-files - and
then copy and rename the script to /etc/init.d/mysql (make sure that
it's also executable - chmod +x mysql)
You'll then need to set the default values for basdir, datadir and pid
file locations.
Here's an excerpt with the top portion of the file and the settings
that worked for me...
# If you change base dir, you must also change datadir. These may get
# overwritten by settings in the MySQL configuration files.
basedir=/usr
datadir=/var/lib/mysql
# Default value, in seconds, afterwhich the script should timeout waiting
# for server start.
# Value here is overriden by value in my.cnf.
# 0 means don't wait at all
# Negative numbers mean to wait indefinitely
service_startup_timeout=900
# Lock directory for RedHat / SuSE.
lockdir='/var/lock/subsys'
lock_file_path="$lockdir/mysql"
# The following variables are only set for letting mysql.server find things.
# Set some defaults
mysqld_pid_file_path=/var/run/mysqld/mysqld.pid
if test -z "$basedir"
After this you should be able to start and stop MySQL as follows:
sudo service mysql start
sudo service mysql stop
As he mentions later, you also need to create /var/run/mysqld/ and set permissions:
sudo mkdir /var/run/mysqld
sudo chown mysql:mysql /var/run/mysqld
I am accidentally delete /usr/bin/mysql from my directory. It make an error when I run mysql_secure_installation and produce following error message.
FATAL ERROR: Could not find /usr/bin/mysql
If you compiled from source, you need to run 'make install' to
copy the software into the correct location ready for operation.
If you are using a binary release, you must either be at the top
level of the extracted archive, or pass the --basedir option
pointing to that location
I have already tried to uninstall mariadb using sudo pacman -Rns mariadb and installing it again, but /usr/bin/mysql not generate. Are someone already face same problem before ?
I seem to be having an issue getting MySQL 5.6.1.5 to install from Source. I am running RHEL 6.
I was able to perform the cmake, make, and make install without issues.
I am attempting to run the mysql_install_db binary and when I do I get the following error:
Fatal ERROR: Could not find ./bin/my_print_defaults
If you compiled from source, you need to run 'make install' to copy the software
into the correct location ready for operation.
If you are using a binary release, you must either bat at the top level of the
extracted archive, or pass the --basedir option pointing to that location.
So I did a check for my_print_defaults using which my_print_defaults, unfortunately it was not found on my machine.
I did a locate my_print_defaults as well just for the heck of it and said it was located in /usr/bin/my_print_defaults, however, when I checked /usr/bin for the binary, it was not actually there.
I would try to use mysql_install_db --basedir=/usr/bin but I know this won't work as the which and locate commands confirm my_print_defaults isn't on my machine.
I looked at mysql_install_db giving error, but that error was not similar to this one.
Please ignore question, I didn't bother to try running find / -name my_print_defaults and found it in /usr/local/mysql/bin/
I searched packages for my_print_defaults with
apt-file search my_print_defaults
If my_print_defaults is missing on your system (which my_print_defaults), first find out which db is installed with:
dpkg -l |grep -E 'maria|mysql'|grep ii|grep server
If you have installed mariadb, try reinstall mariadb:
sudo apt install --reinstall mariadb-server-core-10.1
If you don't find a solution with mariadb, swap back to mysql with
sudo apt install mysql-server
How do I know which configuration file is used by MySQL currently? Is there any command or something to find it out?
The information you want can be found by running
mysql --help
or
mysqld --help --verbose
I tried this command on my machine:
mysql --help | grep "Default options" -A 1
And it printed out:
Default options are read from the following files in the given order:
/etc/my.cnf /usr/local/etc/my.cnf ~/.my.cnf
See if that works for you.
mysqld --help --verbose will find only location of default configuration file. What if you use 2 MySQL instances on the same server? It's not going to help.
Good article about figuring it out:
"How to find MySQL configuration file?"
If you are using terminal just type the following:
locate my.cnf
You can use the report process status ps command:
ps ax | grep '[m]ysqld'
You should find them by default in a folder like /etc/my.cnf, maybe also depends on versions. From MySQL Configuration File:
Interestingly, the scope of this file
can be set according to its location.
The settings will be considered global
to all MySQL servers if stored in
/etc/my.cnf. It will be global to a
specific server if located in the
directory where the MySQL databases
are stored (/usr/local/mysql/data for
a binary installation, or
/usr/local/var for a source
installation). Finally, its scope
could be limited to a specific user if
located in the home directory of the
MySQL user (~/.my.cnf). Keep in mind
that even if MySQL does locate a
my.cnf file in /etc/my.cnf (global to
all MySQL servers on that machine), it
will continue its search for a
server-specific file, and then a
user-specific file. You can think of
the final configuration settings as
being the result of the /etc/my.cnf,
mysql-data-dir/my.cnf, and ~/.my.cnf
files.
There are a few switches to package managers to list specific files.
RPM Sytems:
There are switches to rpm command, -q for query, and -c or --configfiles to list config files. There is also -l or --list
The --configfiles one didn't quiet work for me, but --list did list a few .cnf files held by mysql-server
rpm -q --list mysql-server
DEB Systems:
Also with limited success: dpkg --listfiles mysql-server
you can find it by running the following command
mysql --help
it will give you the mysql installed directory and all commands for mysql.
login to mysql with proper credential and used mysql>SHOW VARIABLES LIKE 'datadir'; that will give you path of where mysql stored
Can we run multiple MySQL servers on a single machine?
Thanks.
Yes, you just need to run them on separate ports and point them at different lib directories for their data.
Here's a good reference: http://dev.mysql.com/doc/refman/5.1/en/mutiple-servers.html
(If you want to use this for testing, I suggest checking out MySQL Sandbox which is now replaced by dbdeployer)
There are various methods to run multiple instances of mysql (on different ports) on the same machine. Here I have used the same binary and used a separate configuration file (with separate port, pid, socket and data directory).
We need to create new directories for our datadir and log folder (if used). Also we need to assign proper permissions on those folders:
# mkdir /var/lib/mysql2
# chown -R mysql.mysql /var/lib/mysql2/
# mkdir /var/log/mysql2
# chown -R mysql.mysql /var/log/mysql2
Next we need a separate configuration file same as a default mysql configuration file. So start by copying the existing one and changing the needed values.
# cp /etc/my.cnf /etc/my2.cnf
(or change the path appropriately for your configuration file is in a different place).
Next, we need to edit our new configuration file with different mysql port (default to 3306), the pid and socket than the default ones, and also point the data and log folders to the ones created before.
# cd /etc
# sed -i ‘s/3306/3307/g’ my2.cnf
# sed -i ‘s/mysqld.sock/mysqld2.sock/g’ my2.cnf
# sed -i ‘s/mysqld.pid/mysqld2.pid/g’ my2.cnf
# sed -i ‘s/var\/lib\/mysql/var\/lib\/mysql2/g’ my2.cnf
# sed -i ‘s/var\/log\/mysql/var\/log\/mysql2/g’ my2.cnf
Finally we need to initialize the default dbs:
# mysql_install_db –user=mysql –datadir=/var/lib/mysql2/
Finally we can start our new mysql instance with:
# mysqld_safe – -defaults-file=/etc/my2.cnf &
We can connect to our new instance using:
# mysql -S /var/run/mysqld/mysqld2.sock
or
# mysql -h 127.0.0.1 -P 3307
and if we no longer need it, stop it with:
# mysqladmin -S /var/run/mysqld/mysqld2.sock shutdown
Ref Site : https://linuxinpakistan.com/start-multiple-instances-mysql-machine
My steps on Windows 10:
Copy C:\ProgramData\MySQL\MySQL Server 8.0\my.ini to C:\ProgramData\MySQL\MySQL Server 8.0\my1.ini
Open my1.ini and modify:
port=3307(under Client and Server Section)
datadir=C:/ProgramData/MySQL/MySQL Server 8.0/Data1
report_port=3307
Copy C:\ProgramData\MySQL\MySQL Server 8.0\Data to C:\ProgramData\MySQL\MySQL Server 8.0\Data1
Run on cmd prompt: (With Administrator privileges if necessary)
C:\Program Files\MySQL\MySQL Server 8.0\bin>mysqld --install MySQL80-1 --defaults-file="C:\ProgramData\MySQL\MySQL Server 8.0\my1.ini"
If all went well, you will see:
Service successfully installed.
Win+R
Type services.msc, find the service name MySQL80-1, right-click on it and click Start.
If all went well, you will see the Status change to Running.
If it did not go well, open xxx.err file found in C:\ProgramData\MySQL\MySQL Server 8.0\Data1 to check why.
If you do not want the service anymore:
Stop it
Delete it on the cmd prompt using sc delete MySQL80-1 where MySQL80-1 is your service name.
For Windows, if the version of mysql server is different then using MYSQL Installer download and install the different versions of the MYSQL server.
Select Reconfigure for each MYSQL server and configure the PORT differently. Complete the configuration steps by clicking next until it is finished
Yes definitely,
Create multiple configuration files with different ports.
This is the best resource to understand:
Video Tutorial: MySQL Multiple Instances
Reference article: Click here