Zabbix Documentation 4.0

Zabbix Documentation 4.0

1 Create user account

For all of the Zabbix daemon processes, an unprivileged user is required. If a Zabbix daemon is started from an unprivileged user account, it will run as that user.

However, if a daemon is started from a 'root' account, it will switch to a 'zabbix' user account, which must be present. To create such a user account (in its own group, “zabbix”),

on a RedHat-based system, run:

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1 2	groupadd --system zabbix useradd --system -g zabbix -d /usr/lib/zabbix -s /sbin/nologin -c "Zabbix Monitoring System" zabbix

Zabbix processes do not need a home directory, which is why we do not recommend creating it. However, if you are using some functionality that requires it (e. g. store MySQL credentials in

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1	$HOME/.my.cnf

you are free to create it using the following commands.

On RedHat-based systems, run:

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1 2	mkdir -m u=rwx,g=rwx,o= -p /usr/lib/zabbix chown zabbix:zabbix /usr/lib/zabbix

a. Install Zabbix repository

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# rpm -Uvh https://repo.zabbix.com/zabbix/4.0/rhel/7/x86_64/zabbix-release-4.0-1.el7.noarch.rpm ​ # yum clean all

b. Install Zabbix server, frontend, agent

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1 2	# yum -y install zabbix-server-mysql zabbix-web-mysql zabbix-agent #  yum install -y mariadb-server

修改mariadb数据存放路径

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CentOS7 中修改 Mariadb 数据库数据的存储路径 ​ Mariadb 默认的数据存储目录为 /var/lib/mysql，要想改为指定目录，步骤如下。 ​ 1. 创建新目录 比如在根目录下创建一个 data 目录： # mkdir -p /data/mysql 给这个目录加上读写权限： # chmod -R 777 /data/mysql 2. 修改 /data/mysql 目录的拥有者 # chown -R mysql:mysql /data/mysql 3. 编辑 Mariadb 的配置文件 /etc/my.cnf 把[mysqld]下的配置项datadir和socket注释掉（以防有问题再改回来），新加行改为新的内容，如下： [mysqld] datadir=/data/mysql ​ [client] default-character-set=utf8 socket=/var/lib/mysql/mysql.sock 注：如果文件中没有[client]，需要手动加上。 ​ 保存文件退出。 ​ 4. 重新启动 Mariadb 服务 # systemctl start mariadb.service

c. Create initial database

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# mysql -uroot -p ​ password ​ mysql> create database zabbix character set utf8 collate utf8_bin; ​ mysql> grant all privileges on zabbix.* to zabbix@localhost identified by 'zabbix'; ​ mysql> quit;

Import initial schema and data. You will be prompted to enter your newly created password.

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1	# zcat /usr/share/doc/zabbix-server-mysql*/create.sql.gz | mysql -uzabbix -p zabbix

d. Configure the database for Zabbix server

Edit file /etc/zabbix/zabbix_server.conf

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1	DBPassword=zabbix

e. Configure PHP for Zabbix frontend

Edit file /etc/httpd/conf.d/zabbix.conf, uncomment and set the right timezone for you.

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1	# php_value date.timezone Europe/Riga

f. Start Zabbix server and agent processes

Start Zabbix server and agent processes and make it start at system boot:

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# systemctl restart zabbix-server zabbix-agent httpd ​ # systemctl enable zabbix-server zabbix-agent httpd

Now your Zabbix server is up and running!

Additionally, to use any other language than English, its locale should be installed on the web server. See the "See also" section in the “User profile” page to find out how to install it if required.

Since Zabbix 4.0.8, write permissions to the assets directory are required for the web server user.

Installing frontend

Step 1

In your browser, open Zabbix URL: http://<server_ip_or_name>/zabbix

You should see the first screen of the frontend installation wizard.

Step 2

Make sure that all software prerequisites are met.

Pre-requisite	Minimum value	Description
PHP version	5.4.0
PHP memory_limit option	128MB	In php.ini: memory_limit = 128M
PHP post_max_size option	16MB	In php.ini: post_max_size = 16M
PHP upload_max_filesize option	2MB	In php.ini: upload_max_filesize = 2M
PHP max_execution_time option	300 seconds (values 0 and -1 are allowed)	In php.ini: max_execution_time = 300
PHP max_input_time option	300 seconds (values 0 and -1 are allowed)	In php.ini: max_input_time = 300
PHP session.auto_start option	must be disabled	In php.ini: session.auto_start = 0
Database support	One of: MySQL, Oracle, PostgreSQL, IBM DB2	One of the following modules must be installed: mysql, oci8, pgsql, ibm_db2
bcmath		php-bcmath
mbstring		php-mbstring
PHP mbstring.func_overload option	must be disabled	In php.ini: mbstring.func_overload = 0
PHP always_populate_raw_post_data option	must be disabled	Required only for PHP versions 5.6.0 or newer. In php.ini: always_populate_raw_post_data = -1
sockets		php-net-socket. Required for user script support.
gd	2.0 or higher	php-gd. PHP GD extension must support PNG images (--with-png-dir), JPEG (--with-jpeg-dir) images and FreeType 2 (--with-freetype-dir).
libxml	2.6.15	php-xml or php5-dom
xmlwriter		php-xmlwriter
xmlreader		php-xmlreader
ctype		php-ctype
session		php-session
gettext		php-gettext Since Zabbix 2.2.1, the PHP gettext extension is not a mandatory requirement for installing Zabbix. If gettext is not installed, the frontend will work as usual, however, the translations will not be available.

Optional pre-requisites may also be present in the list. A failed optional prerequisite is displayed in orange and has a Warning status. With a failed optional pre-requisite, the setup may continue.

If there is a need to change the Apache user or user group, permissions to the session folder must be verified. Otherwise Zabbix setup may be unable to continue.

Step 3

Enter details for connecting to the database. Zabbix database must already be created.

Step 4

Enter Zabbix server details.

Entering a name for Zabbix server is optional, however, if submitted, it will be displayed in the menu bar and page titles.

Step 5

Review a summary of settings.

Step 6

Download the configuration file and place it under conf/ in the webserver HTML documents subdirectory where you copied Zabbix PHP files to.

Providing the webserver user has write access to conf/ directory the configuration file would be saved automatically and it would be possible to proceed to the next step right away.

Step 7

Finish the installation.

Step 8

Zabbix frontend is ready! The default user name is Admin, password zabbix.

Proceed to getting started with Zabbix.

3 Installing Java gateway

It is required to install Java gateway only if you want to monitor JMX applications. Java gateway is lightweight and does not require a database.

To install from sources, first download and extract the source archive.

To compile Java gateway, run the ./configure script with --enable-java option. It is advisable that you specify the --prefix option to request installation path other than the default /usr/local, because installing Java gateway will create a whole directory tree, not just a single executable.

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1	$ ./configure --enable-java --prefix=$PREFIX

To compile and package Java gateway into a JAR file, run make. Note that for this step you will need javac and jar executables in your path.

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$ make

Now you have a zabbix-java-gateway-$VERSION.jar file in src/zabbix_java/bin. If you are comfortable with running Java gateway from src/zabbix_java in the distribution directory, then you can proceed to instructions for configuring and running Java gateway. Otherwise, make sure you have enough privileges and run make install.

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1	$ make install

Proceed to setup for more details on configuring and running Java gateway.

See also

1. How to configure shared memory for Zabbix daemons