librenms-librenms/doc/Installation/Installation-CentOS-7-Apache.md

source: Installation/Installation-CentOS-7-Apache.md

NOTE: These instructions assume you are the root user. If you are not, prepend sudo to the shell commands (the ones that aren't at mysql> prompts) or temporarily become a user with root privileges with sudo -s or sudo -i.

Install Required Packages

yum install epel-release

rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm

yum install composer cronie fping git httpd ImageMagick jwhois mariadb mariadb-server mtr MySQL-python net-snmp net-snmp-utils nmap php71w php71w-cli php71w-common php71w-curl php71w-gd php71w-mcrypt php71w-mysql php71w-snmp php70w-xml php71w-zip python-memcached rrdtool

Add librenms user

useradd librenms -d /opt/librenms -M -r
usermod -a -G librenms apache

Install LibreNMS

cd /opt
git clone https://github.com/librenms/librenms.git librenms

DB Server

Configure MySQL

systemctl restart mariadb
mysql -uroot

NOTE: Please change the 'password' below to something secure.

CREATE DATABASE librenms CHARACTER SET utf8 COLLATE utf8_unicode_ci;
CREATE USER 'librenms'@'localhost' IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON librenms.* TO 'librenms'@'localhost';
FLUSH PRIVILEGES;
exit

vi /etc/my.cnf

NOTE: Whilst we are working on ensuring LibreNMS is compatible with MySQL strict mode, for now, please disable this after mysql is installed.

Within the [mysqld] section please add:

innodb_file_per_table=1
sql-mode=""
lower_case_table_names=0

systemctl enable mariadb
systemctl restart mariadb

Web Server

Configure PHP

Ensure date.timezone is set in php.ini to your preferred time zone. See http://php.net/manual/en/timezones.php for a list of supported timezones. Valid examples are: "America/New_York", "Australia/Brisbane", "Etc/UTC".

vi  /etc/php.ini

Configure Apache

vi /etc/httpd/conf.d/librenms.conf

Add the following config, edit ServerName as required:

<VirtualHost *:80>
  DocumentRoot /opt/librenms/html/
  ServerName  librenms.example.com

  AllowEncodedSlashes NoDecode
  <Directory "/opt/librenms/html/">
    Require all granted
    AllowOverride All
    Options FollowSymLinks MultiViews
  </Directory>
</VirtualHost>

NOTE: If this is the only site you are hosting on this server (it should be :)) then you will need to disable the default site. rm -f /etc/httpd/conf.d/welcome.conf

systemctl enable httpd
systemctl restart httpd

SELinux

yum install policycoreutils-python

semanage fcontext -a -t httpd_sys_content_t '/opt/librenms/logs(/.*)?'
semanage fcontext -a -t httpd_sys_rw_content_t '/opt/librenms/logs(/.*)?'
restorecon -RFvv /opt/librenms/logs/
semanage fcontext -a -t httpd_sys_content_t '/opt/librenms/rrd(/.*)?'
semanage fcontext -a -t httpd_sys_rw_content_t '/opt/librenms/rrd(/.*)?'
restorecon -RFvv /opt/librenms/rrd/
setsebool -P httpd_can_sendmail=1

Allow access through firewall

firewall-cmd --zone public --add-service http
firewall-cmd --permanent --zone public --add-service http
firewall-cmd --zone public --add-service https
firewall-cmd --permanent --zone public --add-service https

Configure snmpd

cp /opt/librenms/snmpd.conf.example /etc/snmp/snmpd.conf

vi /etc/snmp/snmpd.conf

Edit the text which says RANDOMSTRINGGOESHERE and set your own community string.

curl -o /usr/bin/distro https://raw.githubusercontent.com/librenms/librenms-agent/master/snmp/distro
chmod +x /usr/bin/distro
systemctl enable snmpd
systemctl restart snmpd

Cron job

cp /opt/librenms/librenms.nonroot.cron /etc/cron.d/librenms

Copy logrotate config

LibreNMS keeps logs in /opt/librenms/logs. Over time these can become large and be rotated out. To rotate out the old logs you can use the provided logrotate config file:

cp /opt/librenms/misc/librenms.logrotate /etc/logrotate.d/librenms

Set permissions

chown -R librenms:librenms /opt/librenms
setfacl -d -m g::rwx /opt/librenms/rrd /opt/librenms/logs
setfacl -R -m g::rwx /opt/librenms/rrd /opt/librenms/logs

Web installer

Now head to the web installer and follow the on-screen instructions.

http://librenms.example.com/install.php

Final steps

Run validate.php as root in the librenms directory:

cd /opt/librenms
./validate.php

That's it! You now should be able to log in to http://librenms.example.com/. Please note that we have not covered HTTPS setup in this example, so your LibreNMS install is not secure by default. Please do not expose it to the public Internet unless you have configured HTTPS and taken appropriate web server hardening steps.

Add first device

We now suggest that you add localhost as your first device from within the WebUI.

What next?

Now that you've installed LibreNMS, we'd suggest that you have a read of a few other docs to get you going:

• Performance tuning
• Alerting
• Device Groups
• Auto discovery

Closing

We hope you enjoy using LibreNMS. If you do, it would be great if you would consider opting into the stats system we have, please see this page on what it is and how to enable it.

If you would like to help make LibreNMS better there are many ways to help. You can also support our Collective.