MariaDB, Redis, and RRDcached will be installed on a dedicated machine that will not run LibreNMS.
Install necessary packages
apt install redis-server rrdcached mariadb-serverCurrently, the Redis Server is only bound to 127.0.0.1 - modify the server config to bind to either all interfaces or a single access network address.
vim /etc/redis/redis.confModify the bind config. Comment out the original localhost entry and create a new one with your desired config
#To bind all interface addresses
bind 0.0.0.0
#To bind to a specific interface address
bind 192.168.128.4Restart redis-server
systemctl restart redis-server.service
systemctl status redis-server.service Make MariaDB accessible to the pollers
Modify the MariaDB config to bind the correct interfaces like completed with the Redis Server
vim /etc/mysql/mariadb.conf.d/50-server.cnfChange the interface binding
#bind-address = 127.0.0.1
bind-address = 0.0.0.0Restart MariaDB
systemctl restart mariadb.serviceGrant access to the LibreNMS database from the pollers
mysql -u root
use librenms;Allow user librenms to login from 192.168.128.0/24
create user 'librenms'@'192.168.128.%' identified by '********';Grant all privileges to user librenms on database librenms coming from anywhere on 192.168.128.0/24
grant all privileges on librenms.* to 'librenms'@'192.168.128.%';Flush privileges now that the changes have been made
flush privileges;
exitBind rrdcachd to a network interface
Edit the /etc/default/rrdcached config file. Modify BASE_OPTIONS to look like this:
BASE_OPTIONS="-B -F -R -l 0:42217"In the web GUI, tell each node where to find the RRD files (the setting will be communicated to the other nodes via Redis)
Define the Redis server in the .env config file of all LibreNMS nodes
#-----------------------#
# Redis Configuration #
#-----------------------#
REDIS_HOST=192.168.128.4 <-- Use the IP address of the Redis (database) server
REDIS_PORT=6379
REDIS_DB=0
CACHE_DRIVER=redis