To start with we require server ready with CentOS 7.x 64 bit
1) For Icinga2 installation we require server root access
$ sudo su -
now enter password to get the root prompt
#
2) Ensure SELINUX is disabled and to check the status run following command
# sestatus
and to disable read
Howto Disable SELINUX on CentOS 5.x / RHEL 5.x
3) Add EPEL repository as it is required for deploying Icinga2
# yum install epel-release
4) Add Icinga2 repository
# rpm --import http://packages.icinga.org/icinga.key
# curl -o /etc/yum.repos.d/ICINGA-release.repo http://packages.icinga.org/epel/ICINGA-release.repo
# yum makecache
5) Deploy Apache2 web server
# yum install httpd
to start and enable Apache2 server run following command
# systemctl start httpd && systemctl enable httpd
and to check the status of the server
# systemctl status httpd
open http://SERVERIPADDRESS/ url in the browser and you should get default apache2 page
create index.html file as this will take care of http warning initially displayed by Icinga2
# touch /var/www/html/index.html
6) Deploy MariaDB database server
# yum install mariadb-server mariadb
to start and enable MariaDB server run following command
# systemctl start mariadb && systemctl enable mariadb
and check the status of the server
# systemctl status mariadb
now lets secure Mariadb server
# mysql_secure_installation
Enter current password for root (enter for none): (click on enter as no password is set by default)
Set root password? [Y/n] (click on enter to set root password)
New password: (type new root password)
Re-enter new password: (reenter new root password)
Remove anonymous users? [Y/n] (click on enter to remove all anonymous users)
Disallow root login remotely? [Y/n] (click on enter to disallow root login remotely)
Remove test database and access to it? [Y/n] (click on enter to delete test database)
Reload privilege tables now? [Y/n] (click on enter to reload user privileges)
7) Deploy PHP
# yum install php php-mysql php-ldap
update timezone in php.ini
# vi /etc/php.ini
search for [date] section and set timezone as per your location and save the file
date.timezone = "Asia/Kolkata"
restart apache2 server
# systemctl restart httpd
and check the status of the server
# systemctl status httpd
8) Deploy Icinga2
# yum install icinga2
to start and enable Icinga2 server run following command
# systemctl start icinga2 && systemctl enable icinga2
and check the status of the server
# systemctl status icinga2
by default all config files are stored in /etc/icinga2 directory
and by default Icinga2 enables three features and it can be checked by running following command
# icinga2 feature list
9) Install Nagios plugins
# yum install nagios-plugins-all
by default plugins are installed in /usr/lib64/nagios/plugins/ directory and if plugin path is to be changed then it has to be updated for "const PluginDir" parameter in /etc/icinga2/constants.conf file
restart Icinga2 server
# systemctl restart icinga2
10) Configure IDO Mysql module
# yum install icinga2-ido-mysql
login into mariadb
# mysql -u root -p (at the password prompt provide root password)
at the prompt run following commands
> CREATE DATABASE icinga;
> GRANT SELECT, INSERT, UPDATE, DELETE, DROP, CREATE VIEW, INDEX, EXECUTE ON icinga.* TO 'icinga'@'localhost' IDENTIFIED BY 'icinga';
> use icinga;
to import database schema run following command
> \. /usr/share/icinga2-ido-mysql/schema/mysql.sql
> exit
now lets update ido-mysql.conf file as follows
# vi /etc/icinga2/features-available/ido-mysql.conf
Edit IdoMysqlConnection section as follows
object IdoMysqlConnection "ido-mysql" {
user = "icinga"
password = "icinga"
host = "localhost"
port = 3306
database = "icinga"
table_prefix = "icinga_"
instance_name = "icinga2"
instance_description = "icinga2 instance"
}
11) Enable web interface feature to send commands to Icinga2
# icinga2 feature enable command
check if command is added in Enabled feature list
# icinga2 feature list
restart icinga2 to take effect
# systemctl restart icinga2
12) Add apache user to icingacmd group
# usermod -a -G icingacmd apache
to check if apache user is added to the group run following command
# id apache
and output would look similar to
uid=48(apache) gid=48(apache) groups=48(apache),992(icingacmd)
13) Deploy Icinga Web 2 and Icingacli
# yum install icingaweb2 icingacli
restart icinga2 to take effect
# systemctl restart icinga2
create database for Icinga web 2
# mysql -u root -p (at the password prompt provide mariadb root password)
at the prompt run following commands
> CREATE DATABASE icingaweb2;
> GRANT SELECT, INSERT, UPDATE, DELETE, DROP, CREATE VIEW, INDEX, EXECUTE ON icingaweb2.* TO 'icingaweb2'@'localhost' IDENTIFIED BY 'icingaweb2';
> exit
restart apache2 server
# systemctl restart httpd
and check the status of the server
# systemctl status httpd
14) Now generate token to proceed with the installation using browser
# icingacli setup token create
to recheck generated token run following command
# icingacli setup token show
open http://SERVERIPADDRESS/icingaweb2/setup URL in the browser to proceed with the installation
On 'Setup' page provide setup token and click on "Next"
On 'Modules' page click on "Next"
On 'Requirement' page ensure every option is green, scroll to bottom of the page and click on "Next"
On 'Authentication' page the default Authentication Type is set to Database, click on "Next"
On 'Database Resource' page provide details as follows
Resource Name : icingaweb2
Database Type : MySQL
Host : localhost
Port : 3306
Database Name : icingaweb2
Username : icingaweb2
Password : icingaweb2
Click on "Validate Configuration" and once successfully validated click on "Next"
On 'Database Setup' page for Username and Password provide MariaDB administrative username i.e root and its configured password and click on "Next"
On 'Authentication Backend' page keep default value and click on "Next"
On 'Administration' page create Icinga Web2 administrative user i.e admin, and set its password now click on "Next"
On 'Application Configuration' page keep default value and click on "Next"
On 'Configuration' page it will show all configuration provided earlier and would mention that Icinga Web 2 is successfully installed and click on "Next"
On 'Welcome' page click on "Next"
On 'Monitoring Backend' page keep default values and click on "Next"
On 'Monitoring IDO Resource'page provide details as follows
Resource Name : icingaido
Database Type : MySql
Host : localhost
Port : 3306
Database Name : icinga
Username : icinga
Password : icinga
Click on "Validate Configuration" and once successfully validated click on "Next"
On 'Command Transport' page keep default values and click on "Next"
On 'Monitoring Security' page keep default values and click on "Next"
On 'Finish' page click on "Finish"
On 'Congratulations' page on the the right hand side, click on 'Login to Icinga Web 2'. On login page provide Icinga Web2 admin user name and password to go to Icinga Dashboard page.
With this you have successfully deployed Icinga2 Server along with Icinga Web2 and Icingacli module. Now you can proceed with configuring servers to be monitored that will be covered in the next blog post.
1) For Icinga2 installation we require server root access
$ sudo su -
now enter password to get the root prompt
#
2) Ensure SELINUX is disabled and to check the status run following command
# sestatus
and to disable read
Howto Disable SELINUX on CentOS 5.x / RHEL 5.x
3) Add EPEL repository as it is required for deploying Icinga2
# yum install epel-release
4) Add Icinga2 repository
# rpm --import http://packages.icinga.org/icinga.key
# curl -o /etc/yum.repos.d/ICINGA-release.repo http://packages.icinga.org/epel/ICINGA-release.repo
# yum makecache
5) Deploy Apache2 web server
# yum install httpd
to start and enable Apache2 server run following command
# systemctl start httpd && systemctl enable httpd
and to check the status of the server
# systemctl status httpd
open http://SERVERIPADDRESS/ url in the browser and you should get default apache2 page
create index.html file as this will take care of http warning initially displayed by Icinga2
# touch /var/www/html/index.html
6) Deploy MariaDB database server
# yum install mariadb-server mariadb
to start and enable MariaDB server run following command
# systemctl start mariadb && systemctl enable mariadb
and check the status of the server
# systemctl status mariadb
now lets secure Mariadb server
# mysql_secure_installation
Enter current password for root (enter for none): (click on enter as no password is set by default)
Set root password? [Y/n] (click on enter to set root password)
New password: (type new root password)
Re-enter new password: (reenter new root password)
Remove anonymous users? [Y/n] (click on enter to remove all anonymous users)
Disallow root login remotely? [Y/n] (click on enter to disallow root login remotely)
Remove test database and access to it? [Y/n] (click on enter to delete test database)
Reload privilege tables now? [Y/n] (click on enter to reload user privileges)
7) Deploy PHP
# yum install php php-mysql php-ldap
update timezone in php.ini
# vi /etc/php.ini
search for [date] section and set timezone as per your location and save the file
date.timezone = "Asia/Kolkata"
restart apache2 server
# systemctl restart httpd
and check the status of the server
# systemctl status httpd
8) Deploy Icinga2
# yum install icinga2
to start and enable Icinga2 server run following command
# systemctl start icinga2 && systemctl enable icinga2
and check the status of the server
# systemctl status icinga2
and by default Icinga2 enables three features and it can be checked by running following command
# icinga2 feature list
9) Install Nagios plugins
# yum install nagios-plugins-all
by default plugins are installed in /usr/lib64/nagios/plugins/ directory and if plugin path is to be changed then it has to be updated for "const PluginDir" parameter in /etc/icinga2/constants.conf file
restart Icinga2 server
# systemctl restart icinga2
10) Configure IDO Mysql module
# yum install icinga2-ido-mysql
login into mariadb
# mysql -u root -p (at the password prompt provide root password)
at the prompt run following commands
> CREATE DATABASE icinga;
> GRANT SELECT, INSERT, UPDATE, DELETE, DROP, CREATE VIEW, INDEX, EXECUTE ON icinga.* TO 'icinga'@'localhost' IDENTIFIED BY 'icinga';
> use icinga;
to import database schema run following command
> \. /usr/share/icinga2-ido-mysql/schema/mysql.sql
> exit
now lets update ido-mysql.conf file as follows
# vi /etc/icinga2/features-available/ido-mysql.conf
Edit IdoMysqlConnection section as follows
object IdoMysqlConnection "ido-mysql" {
user = "icinga"
password = "icinga"
host = "localhost"
port = 3306
database = "icinga"
table_prefix = "icinga_"
instance_name = "icinga2"
instance_description = "icinga2 instance"
}
11) Enable web interface feature to send commands to Icinga2
# icinga2 feature enable command
check if command is added in Enabled feature list
# icinga2 feature list
restart icinga2 to take effect
# systemctl restart icinga2
12) Add apache user to icingacmd group
# usermod -a -G icingacmd apache
to check if apache user is added to the group run following command
# id apache
and output would look similar to
uid=48(apache) gid=48(apache) groups=48(apache),992(icingacmd)
13) Deploy Icinga Web 2 and Icingacli
# yum install icingaweb2 icingacli
restart icinga2 to take effect
# systemctl restart icinga2
# mysql -u root -p (at the password prompt provide mariadb root password)
at the prompt run following commands
> CREATE DATABASE icingaweb2;
> GRANT SELECT, INSERT, UPDATE, DELETE, DROP, CREATE VIEW, INDEX, EXECUTE ON icingaweb2.* TO 'icingaweb2'@'localhost' IDENTIFIED BY 'icingaweb2';
> exit
restart apache2 server
# systemctl restart httpd
and check the status of the server
# systemctl status httpd
14) Now generate token to proceed with the installation using browser
# icingacli setup token create
to recheck generated token run following command
# icingacli setup token show
open http://SERVERIPADDRESS/icingaweb2/setup URL in the browser to proceed with the installation
On 'Setup' page provide setup token and click on "Next"
On 'Modules' page click on "Next"
On 'Requirement' page ensure every option is green, scroll to bottom of the page and click on "Next"
On 'Authentication' page the default Authentication Type is set to Database, click on "Next"
On 'Database Resource' page provide details as follows
Resource Name : icingaweb2
Database Type : MySQL
Host : localhost
Port : 3306
Database Name : icingaweb2
Username : icingaweb2
Password : icingaweb2
Click on "Validate Configuration" and once successfully validated click on "Next"
On 'Database Setup' page for Username and Password provide MariaDB administrative username i.e root and its configured password and click on "Next"
On 'Authentication Backend' page keep default value and click on "Next"
On 'Administration' page create Icinga Web2 administrative user i.e admin, and set its password now click on "Next"
On 'Application Configuration' page keep default value and click on "Next"
On 'Configuration' page it will show all configuration provided earlier and would mention that Icinga Web 2 is successfully installed and click on "Next"
On 'Welcome' page click on "Next"
On 'Monitoring Backend' page keep default values and click on "Next"
On 'Monitoring IDO Resource'page provide details as follows
Resource Name : icingaido
Database Type : MySql
Host : localhost
Port : 3306
Database Name : icinga
Username : icinga
Password : icinga
Click on "Validate Configuration" and once successfully validated click on "Next"
On 'Command Transport' page keep default values and click on "Next"
On 'Monitoring Security' page keep default values and click on "Next"
On 'Finish' page click on "Finish"
On 'Congratulations' page on the the right hand side, click on 'Login to Icinga Web 2'. On login page provide Icinga Web2 admin user name and password to go to Icinga Dashboard page.
With this you have successfully deployed Icinga2 Server along with Icinga Web2 and Icingacli module. Now you can proceed with configuring servers to be monitored that will be covered in the next blog post.
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