Installation of Zabbix in Centos 7

Lakshmana

Yes, I have started the MariaDB by the following command given below

sudo systemctl start mariadb
sudo systemctl enable mariadb

scottalanmiller

Use ps to see if it is running.

Lakshmana

Yes,the MySQL is working

[lakshmana@dny-lnx-zabbix ~]$ ps -ef | grep mysql
root 27635 27481 0 13:14 pts/4 00:00:00 sudo mysql_secure_installation
root 27636 27635 0 13:14 pts/4 00:00:00 /bin/sh /bin/mysql_secure_installation
mysql 27770 1 0 13:23 ? 00:00:00 /bin/sh /usr/bin/mysqld_safe --basedir=/usr
mysql 27928 27770 0 13:23 ? 00:00:00 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/log/mariadb/mariadb.log --pid-file=/var/run/mariadb/mariadb.pid --socket=/var/lib/mysql/mysql.sock
lakshma+ 28085 27663 0 13:28 pts/5 00:00:00 grep --color=auto mysql

Lakshmana

Then I have Set MySQL root password

By default, MySQL root password is empty. So, to prevent unauthorized access to MySQL, let us set root user password. Enter the following command to setup mysql root user password:

mysql_secure_installation
/usr/bin/mysql_secure_installation: line 379: find_mysql_client: command not found

NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!

In order to log into MariaDB to secure it, we'll need the current
password for the root user. If you've just installed MariaDB, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.

Enter current password for root (enter for none):
OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MariaDB
root user without the proper authorisation.

Set root password? [Y/n] y ## Enter Y and press Enter
New password: ## Enter new password
Re-enter new password: ## Enter password again
Password updated successfully!
Reloading privilege tables..
... Success!

By default, a MariaDB installation has an anonymous user, allowing anyone
to log into MariaDB without having to have a user account created for
them. This is intended only for testing, and to make the installation
go a bit smoother. You should remove them before moving into a
production environment.

Remove anonymous users? [Y/n] y ## Enter Y and press Enter
... Success!

Normally, root should only be allowed to connect from 'localhost'. This
ensures that someone cannot guess at the root password from the network.

Disallow root login remotely? [Y/n] y ## Enter Y and press Enter
... Success!

By default, MariaDB comes with a database named 'test' that anyone can
access. This is also intended only for testing, and should be removed
before moving into a production environment.

Remove test database and access to it? [Y/n] y ## Enter Y and press Enter

Dropping test database...
... Success!
Removing privileges on test database...
... Success!

Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.

Reload privilege tables now? [Y/n] y ## Enter Y and press Enter
... Success!

Cleaning up...

All done! If you've completed all of the above steps, your MariaDB
installation should now be secure.

Thanks for using MariaDB!

scottalanmiller

Looks like you are all set then. What is the issue?

Lakshmana

There is no issue. The installation is going on now

scottalanmiller

Oh okay.

Lakshmana

PHP (recursive acronym for PHP: Hypertext Preprocessor) is a widely used open-source general purpose scripting language that is especially suited for web development and can be embedded into HTML.

Install PHP with following command:

sudo yum install php php-mysql php-gd php-pear -y

scottalanmiller

PHP actually standards of Personal Home Page which makes little sense, bit it was what PHP was created as. The acronym you mention is something new that people have tried to change it to, but PHP was created as Personal Home Page. As a true acronym they can't exactly change it later

Lakshmana

The PHP installed by the following command

sudo yum install php php-mysql php-gd php-pear -y

Test PHP:
Create a sample “testphp.php” file in Apache document root folder and append the lines as shown below:

vi /var/www/html/testphp.php
Add the following lines.

<?php
phpinfo();
?>
Restart httpd service:

systemctl restart httpd

Lakshmana

Navigate to http://server-ip-address/testphp.php. It will display all the details about php such as version, build date and commands etc.

phpinfo() - Mozilla Firefox_002

If you want to install all php modules, enter the command yum install php* -y and restart the httpd service. To verify for the modules, open web browser and navigate to http://server-ip-address/testphp.php. You will then see all php modules.

Lakshmana

phpMyAdmin is a free open-source web interface tool used to manage your MySQL databases. By default phpMyAdmin will not be not found in CentOS/RHEL/Scientific Linux official repositories. So let us install it from EPEL repository.

To add EPEL repository, just follow the link.

Install EPEL Repository on RHEL/CentOS/Scientific Linux 7
Now, install phpMyAdmin:

sudo yum install phpmyadmin -y
Configure phpMyAdmin
By default, phpMyAdmin can only be accessed from the localhost itself. To make it to accessible globally, do the following steps.

Edit the phpmyadmin.conf file:

vi /etc/httpd/conf.d/phpMyAdmin.conf

Lakshmana

In the above path Why I have to put hashes in the configuration files?

scottalanmiller

Hashes denote comments.

Lakshmana

Find and comment the whole /<Directory> section and add the lines as shown below:

[...]
Alias /phpMyAdmin /usr/share/phpMyAdmin
Alias /phpmyadmin /usr/share/phpMyAdmin

Comment the following Section

#<Directory /usr/share/phpMyAdmin/>

<IfModule mod_authz_core.c>

# Apache 2.4

<RequireAny>

Require ip 127.0.0.1

Require ip ::1

</RequireAny>

</IfModule>

<IfModule !mod_authz_core.c>

# Apache 2.2

Order Deny,Allow

Deny from All

Allow from 127.0.0.1

Allow from ::1

</IfModule>

#</Directory>

Add the following lines:

<Directory /usr/share/phpMyAdmin/>
Options none
AllowOverride Limit
Require all granted
</Directory>
[...]
Edit “config.inc.php” file and change from “cookie” to “http” to change the authentication in phpMyAdmin:

vi /etc/phpMyAdmin/config.inc.php
Change ‘cookie’ to ‘http’.

[...]
/* Authentication type */
$cfg['Servers'][$i]['auth_type'] = 'http'; // Authentication method (config, http or cookie based)?
[...]
Restart the Apache service:

systemctl restart httpd

Lakshmana

After this step I am unable to login to the Phpadmin page in the browser

Lakshmana

What may be the issue with this?

Lakshmana

Logged in now with proper username and password

Lakshmana

Create MySQL database and user for Zabbix

Login to MariaDB prompt with command:

mysql -u root -p
Create a database called ‘zabbixdb’ and database user called ‘zabbixuser’.

Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 10
Server version: 5.5.41-MariaDB MariaDB Server

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> create database zabbixdb character set utf8;
Query OK, 1 row affected (0.05 sec)

MariaDB [(none)]> grant all privileges on zabbixdb.* to 'zabbixuser'@'localhost' identified by 'password';
Query OK, 0 rows affected (0.21 sec)

MariaDB [(none)]> flush privileges;
Query OK, 0 rows affected (0.00 sec)

MariaDB [(none)]> exit
Bye

Lakshmana

Error comes here??
[lakshmana@dny-lnx-zabbix ~]$ mysql -u zabbixuser -p zabbixdb < /usr/share/doc/zabbix-server-mysql-2.4.5/create/schema.sql
-bash: /usr/share/doc/zabbix-server-mysql-2.4.5/create/schema.sql: No such file or directory