Centos7 installing MySQL and configuring InnoDB_ ruby

Content description ： Aliyun server centos 7 Installation on system MySQL And configuration innodb_ruby

Reference material ：

Silicon Valley -p99 Linux Lower installation MySQL 5.7 edition

Dark horse -p65 MySQL install Linux edition

CentOS7 install ruby2.6.3

Try to install GPG v2 and then fetch the public key:

1. centos7 install MYSQL

1.1 Download address and version

MySQL Community Server 5.7.38

Centos choice Red Hat

Version selection ：

rpm package, rpm bundle ,Compressed TAR Archive

among ：rpm bundle A version is a collection of all packages , Include server, client etc.

Compressed TAR Archive Source code installation , Need to compile

1.2 The installation process

① download tar After package , Upload to MobaXterm On , Use -xvf decompression

tar -xvf mysql-5.7.38-1.el7.x86_64.rpm-bundle.tar

② adopt ls List the... Under the unzipped directory .rpm file

Install in the following order

rpm -ivh mysql-community-common-5.7.38-1.el7.x86_64.rpm

rpm -ivh mysql-community-libs-5.7.38-1.el7.x86_64.rpm

rpm -ivh mysql-community-libs-compat-5.7.38-1.el7.x86_64.rpm

rpm -ivh mysql-community-devel-5.7.38-1.el7.x86_64.rpm

yum install openssl-devel

rpm -ivh mysql-community-client-5.7.38-1.el7.x86_64.rpm

rpm -ivh mysql-community-server-5.7.38-1.el7.x86_64.rpm

install mysql-community-lib When , There may be a mistake

error: Failed dependencies:
        mysql-community-common(x86-64) >= 5.7.9 is needed by mysql-community-libs-5.7.38-1.el7.x86_64
        mariadb-libs is obsoleted by mysql-community-libs-5.7.38-1.el7.x86_64

reinstall mysql-community-common The same error will be reported

perform yum remove mysql-libs Then again from mysql-community-common Start execution

③ adopt mysqld start-up MySQL The server

systemctl start mysqld

④ adopt mysql Client connection MySQL

mysql -u root -p

After entering the above command , You need to enter a password , But the password has not been set yet , Can be found in mysqld.log View password in

⑤ adopt mysqld.log Check the initial password

cat /var/log/mysqld.log

cat For viewing mysqld.log journal , In the log content [email protected]: The following part is the initial password

After entering the initial password , Can successfully connect MySQL, Next, you have to change the password you set for yourself

⑥ Modify password authentication properties

Come to a conclusion ：MySQL There are certain requirements for password strength , Therefore, you need to modify two properties

validate_password_policy and validate_password_length

There's a hole in this place , That's it 5.7 Version and 8.0 There are minor differences in the version here

MySQL5.7 edition ：

set global validate_password_policy=0;
set global validate_password_length=1;

and MySQL8.0 edition ： The last one _ Instead of .

set global validate_password.policy=0;
set global validate_password.length=1;

According to the show variables like 'validate_password%'; See how these two attributes are written

⑦ adopt alter Set login password

 alter user 'root'@'localhost' identified by 'xxxxxx';

After changing the password ,exit Current connection , Use the new password to verify whether you can successfully log in

⑧ Open cloud server 3306 port

⑨ Create a remote connection root user

[email protected] Only native connections are supported

create user 'root'@'%' identified with mysql_native_password by 'xxxxxx';

2. install innodb_ruby

innodb_ruby I don't know yet , First two links

innodb File analysis tools innodb_ruby

In depth understanding of MySQL–innodb_ruby Tools

If you have any ruby2.2 Environment above version , Execute the following statement to complete the installation

gem install --user-install innodb_ruby

innodb_space --help #  A test can show a lot of help 

If an error is reported during direct installation

[[email protected] ~]# sudo gem install innodb_ruby
sudo: gem: command not found

I don't know anything about this dish ,ruby

Last reliable link , Close test effectively , My guest, you can move the link

centos7 install ruby 2.6.3

2.1 install ruby

① see ruby edition , And check whether it is installed

ruby -v

② install ruby

yum -y install -y ruby

complete! Successful installation

2.2 ruby Version update

Above installation ruby after , You still need to upgrade the version first , Otherwise, it will report an error

[[email protected] ~]# sudo gem install innodb_ruby
Fetching: bindata-2.4.10.gem (100%)
Successfully installed bindata-2.4.10
Fetching: rake-13.0.6.gem (100%)
ERROR:  Error installing innodb_ruby:
        rake requires Ruby version >= 2.2.

① install ruby Dependency package

yum install gcc-c++ patch readline readline-devel zlib zlib-devel \
 libyaml-devel libffi-devel openssl-devel make \
 bzip2 autoconf automake libtool bison iconv-devel sqlite-devel

② Add alicloud's gem Source

gem sources -a http://mirrors.aliyun.com/rubygems/ 　　 -- Add alicloud image address 

③ To get the key

There was no success in obtaining the key here , It may be a little different from the previous installation of the original blogger

Try to install GPG v2 and then fetch the public key:

according to github On wtmitchell3 commented on 3 Sep 2021 User comments resolved successfully

The next one is connected

④ install rvm

curl -sSL https://get.rvm.io | bash -s stable

The picture below appears , Successful installation

⑤ send rvm.sh take effect

source /etc/profile.d/rvm.sh

⑥ rvm list known List the available ruby edition

⑦ install ruby 2.7 edition

rvm install 2.7

Last appearance ：Install of ruby-2.7.2 - #complete Successful installation

⑧ install innodb_ruby

gem install innodb_ruby

⑨ Verify that the installation was successful

innodb_space --help

summary ： Originally planned to install the source code MySQL Of , As a result, I didn't understand it during installation , In addition, the goal of debugging source code is not clear

In addition, I really admire and thank the centos7 install ruby 2.6.3 The author of

install innodb_ruby I want to try to analyze redo_log, Otherwise, let's analyze .ibd file ,

But when I encountered problems during the installation, I was thinking about the unclear solution , Value is not worth the time it takes to continue because the installation failed

After looking for many blogs , At the beginning, I saw the author say that it took 3 Time of day , The brain suddenly became clear , It doesn't matter whether it's worth it or not , It's important to solve the problem

Recent learning MySQL, notice MySQL How it works The author's self mockery is not very outstanding , But to find out MySQL The problem of ,

Resignation writing , It can be inferred from the preface that this period of time will be at least two years

In the process of reading , Can deeply understand the author mentioned In order to speak out , Make it clear , Keep walking back and forth on the ground The kind of painstaking feeling

Really? , Here is the purest spiritual pursuit