Zabbix monitoring on Ubuntu Server 14.04

First Production Ubuntu Server 14.04 running:

1. MariaDB (Mysql) 
2. Nginx 
3. Php5-fpm
4. Zabbix 2.2.*

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DIY Ubuntu Server 14.04, it extremely easy. I mount /var on seperate hard disk for Mysql perfomance. MariaDB have many advantage than Mysql (belong to Oracle already).

hostname zabbix.mydomain.vn && echo 'zabbix.mydomain.vn ' > /etc/hostname

Note: 

• datetime: sync your server to your NTP server.
• Notice your mysql password

sudo apt-get update && apt-get -y dist-upgrade
sudo apt-get install mariadb-server nginx php5-fpm php5-mysql snmp libnet-snmp-perl snmp-mibs-downloader
sudo apt-get install zabbix-server-mysql  zabbix-frontend-php zabbix-agent

MariaDB Mysql 

create zabbix user, zabbix database, grant privileges for zabbix user on database zabbix.

mysql -u root -p
Enter password: your root password at MariaDB installation
create user 'zabbix'@'localhost' identified by 'Zabbix_DB_Passwd';
create database zabbix;
grant all privileges on zabbix.* to 'zabbix'@'localhost';
flush privileges;
exit;

Php5-fpm

Edit /etc/php5/fpm/php.ini for Zabbix

[PHP]
.....
max_execution_time = 300
memory_limit = 128M
post_max_size = 16M
upload_max_filesize = 2M
max_input_time =  300
......
[Date]
date.timezone = Asia/Ho_Chi_Minh

Edit [www] pool /etc/php5/fpm/pool.d/www.conf

[www]
user = www-data
group = www-data
listen = /var/run/php5-fpm.sock
#### It depend on my server hardware, you can leave it as default ^^ #####
pm = dynamic
pm.max_children = 24
pm.start_servers = 8
pm.min_spare_servers = 5
pm.max_spare_servers = 10
pm.max_requests = 50000
chdir = /

Restart php5-fpm

sudo service php5-fpm restart

Nginx 

In my case, this box is dedicated for Zabbix, so default site will be zabbix, Php web app root dir is in /usr/share/zabbix. 

Edit /etc/nginx/sites-available/default

server {
        listen 80 default_server;
        root /usr/share/zabbix;
        index index.php index.html index.htm;
        server_name zabbix.mydomain.vn;
        location / {
                try_files $uri $uri/ =404;
        }
        location ~ \.php$ {
                fastcgi_split_path_info ^(.+\.php)(/.+)$;
                # With php5-fpm:
                fastcgi_pass unix:/var/run/php5-fpm.sock;
                fastcgi_index index.php;
                include fastcgi_params;
        }
}

Restart Nginx

sudo service nginx restart

Zabbix-server 

Init Zabbix database:

cd /usr/share/zabbix-server-mysql/
mysql -u zabbix -p zabbix < schema.sql
mysql -u zabbix -p zabbix < images.sql
mysql -u zabbix -p zabbix < data.sql
sudo cp /usr/share/doc/zabbix-frontend-php/examples/zabbix.conf.php.example /etc/zabbix/zabbix.conf.php

Edit /etc/zabbix/zabbix.conf.php

$DB['TYPE'] = 'MYSQL';
$DB['SERVER'] = 'localhost';
$DB['PORT'] = '0';
$DB['DATABASE'] = 'zabbix';
$DB['USER'] = 'zabbix';
$DB['PASSWORD'] = 'Zabbix_DB_Passwd';
$ZBX_SERVER = 'zabbix.mydomain.vn';
$ZBX_SERVER_PORT = '10051';

Enable Zabbix monster in /etc/default/zabbix-server 

START=yes
CONFIG_FILE="/etc/zabbix/zabbix_server.conf"

Edit /etc/zabbix/zabbix_server.conf 

LogFile=/var/log/zabbix-server/zabbix_server.log
PidFile=/var/run/zabbix/zabbix_server.pid
DBName=zabbix
DBUser=zabbix
DBPassword=Zabbix_DB_Passwd
AlertScriptsPath=/etc/zabbix/alert.d/
FpingLocation=/usr/bin/fping

Start up Zabbix monster

service zabbix-sever restart 

Zabbix-agent

Hostname is very important. It must be same with Hostname in Host Configuration in Zabbix Dashboard.
I disable ServerActive => My Zabbix agent will run in Passive mode (Server directive). The Server will open a port and then visit his Agent port 10050 and ask for his money :D

Edit /etc/zabbix/zabbix_agentd.conf

PidFile=/var/run/zabbix/zabbix_agentd.pid
LogFile=/var/log/zabbix-agent/zabbix_agentd.log
LogFileSize=0
Server=127.0.0.1    #Address of Zabbix Server
Hostname=zabbix.ssis.edu.vn     #FQDN of monitored host

Restart Zabbix-agent

sudo service zabbix-agent restart

Zabbix Dashboard

Go to Zabbix web dashboard: http://zabbix.mydomain.vn
Defaut username: Admin
Default password: zabbix

Add host monitoring will be on next Part

Troubleshooting

MariaDB: /var/log/mysql/error.log

Nginx: /var/log/nginx/error.log

Php5-fpm: /var/log/php5-fpm.log

Zabbix-server: /var/log/zabbix-server/zabbix_server.log

More verbosity? Turn on DebugLevel=4 at /etc/zabbix/zabbix_server.conf

Reference

https://www.zabbix.com/documentation/2.2/manual/installation/install_from_packages

https://www.digitalocean.com/community/articles/how-to-install-zabbix-on-ubuntu-configure-it-to-monitor-multiple-vps-servers