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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.

Please note the minimum supported PHP version is 7.3

Install Required Packages

apt install acl curl composer fping git graphviz imagemagick mariadb-client mariadb-server mtr-tiny nginx-full nmap php7.3-cli php7.3-curl php7.3-fpm php7.3-gd php7.3-json php7.3-mbstring php7.3-mysql php7.3-snmp php7.3-xml php7.3-zip python-memcache python-mysqldb rrdtool snmp snmpd whois python3-pymysql python3-dotenv python3-redis python3-setuptools

Add librenms user

useradd librenms -d /opt/librenms -M -r
usermod -a -G librenms www-data

Download LibreNMS

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

Set permissions

chown -R librenms:librenms /opt/librenms
chmod 770 /opt/librenms
setfacl -d -m g::rwx /opt/librenms/rrd /opt/librenms/logs /opt/librenms/bootstrap/cache/ /opt/librenms/storage/
setfacl -R -m g::rwx /opt/librenms/rrd /opt/librenms/logs /opt/librenms/bootstrap/cache/ /opt/librenms/storage/

Install PHP dependencies

su - librenms
./scripts/composer_wrapper.php install --no-dev
exit

DB Server

Configure MySQL

service mysql restart
mysql -uroot -p

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

CREATE DATABASE librenms CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
CREATE USER 'librenms'@'localhost' IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON librenms.* TO 'librenms'@'localhost';
FLUSH PRIVILEGES;
exit

nano /etc/mysql/mariadb.conf.d/50-server.cnf

Within the [mysqld] section please add:

innodb_file_per_table=1
lower_case_table_names=0

service mysql restart

Web Server

Configure and Start PHP-FPM

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

nano /etc/php/7.3/fpm/php.ini
nano /etc/php/7.3/cli/php.ini

service php7.3-fpm restart

Configure NGINX

rm /etc/nginx/sites-enabled/default
nano /etc/nginx/sites-available/librenms.vhost

Add the following config, edit server_name as required:

server {
 listen      80;
 server_name librenms.example.com;
 root        /opt/librenms/html;
 index       index.php;

 charset utf-8;
 gzip on;
 gzip_types text/css application/javascript text/javascript application/x-javascript image/svg+xml text/plain text/xsd text/xsl text/xml image/x-icon;

 proxy_read_timeout 300;
 proxy_connect_timeout 300;
 proxy_send_timeout 300;

 location / {
  try_files $uri $uri/ /index.php?$query_string;
 }
 location /api/v0 {
  try_files $uri $uri/ /api_v0.php?$query_string;
 }
 location ~ \.php {
  include fastcgi.conf;
  fastcgi_split_path_info ^(.+\.php)(/.+)$;
  fastcgi_pass unix:/var/run/php/php7.3-fpm.sock;
 }
 location ~ /\.ht {
  deny all;
 }
}

ln -s /etc/nginx/sites-available/librenms.vhost /etc/nginx/sites-enabled/librenms.vhost
service nginx reload

Configure snmpd

cp /opt/librenms/snmpd.conf.example /etc/snmp/snmpd.conf
chmod 600 /etc/snmp/snmpd.conf
nano /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
service snmpd restart

Cron job

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

NOTE: Keep in mind that cron, by default, only uses a very limited set of environment variables. You may need to configure proxy variables for the cron invocation. Alternatively adding the proxy settings in config.php is possible too. The config.php file will be created in the upcoming steps. Review the following URL after you finished librenms install steps: https://docs.librenms.org/Support/Configuration/#proxy-support

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

Web installer

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

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

The web installer might prompt you to create a config.php file in your librenms install location manually, copying the content displayed on-screen to the file. If you have to do this, please remember to set the permissions on config.php after you copied the on-screen contents to the file. Run:

chown librenms:librenms /opt/librenms/config.php

Final steps

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 the first device

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

Troubleshooting

If you ever have issues with your install, run validate.php as root in the librenms directory:

cd /opt/librenms
./validate.php

There are various options for getting help listed on the LibreNMS web site: https://www.librenms.org/#support

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:

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 back LibreNMS on Open Collective.