Pre-installation - Recommendations

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Before installing a GLPI server, what should you consider?

It's important to determine several criteria before installing a GLPI server. Some of these may have an impact on the load on the server(s), others on the network load. The right questions to ask yourself before setting up your server are :

▶️ How many users will be able to connect at the same time?

▶️ Will there be automatic inventories?

• If so, estimate the number of assets (computers, monitors, applications, etc.) that will be brought up.

▶️ Will a backup system be set up?

• If so, estimate the resources required to launch backups.

▶️ Do potential IS security layers consume resources, or can they create latencies?

▶️ What system resources are available to you?

• if hosting on-premise :

  • Rack availability

  • Which hardware to order

  • Budget constraints

• Hosting with a provider (Cloud Offer available)

▶️ Are there any recovery constraints (implementation of clusters, load balancing, HA, etc.)?

▶️ Are there any short/medium/long-term business growth forecasts?

Depending on the answers, a simple or improved architecture could be considered.

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What should you think about for a GLPI with heavy traffic?

The more traffic there is to/from your GLPI, the more resources you'll need.

If you assume a large number of users and/or assets to be inventoried, you should consider at least an enhanced archtecture :

Type of enhanced architecture

For high-traffic architecture, we strongly suggest :

▶️ Separate web front-ends :

• one for users

• one for inventory

▶️ Evaluate APACHE resources correctly

• 8-core CPU minimum per machine

• Calibrate configuration for simultaneous task management (connections, worker, etc.)

▶️ Ensure sufficient bandwidth

▶️ Deport SQL layer to a dedicated server

▶️ Associate a second server for SQL replication (necessary for disaster recovery)

▶️ Associated resources for the SQL layer :

• RAM: 16 or 32 GB

• Coniguring 2 GB RAM to the InnoDB buffer pool

• Remember to increase values for temporary table management

• Disk: Nvme -> indispensable for fast database writes

▶️ WEB connection <-> SQL :

• Sufficient bandwidth

• Minimize latency between machines

• If you're using a provider, we strongly encourage you to ensure that the machines are on the same physical site

▶️ Add an NFS share to share files between upstream WEB servers (sessions, attachments, XML inventories, etc...).

Type of enhanced architecture

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Cluster, Load-Balancing, High-Availability: can GLPI be integrated into this type of architecture?

Yes, this type of architecture is perfectly feasible with GLP. It's part of a high-availability, disaster recovery mode, in the event of the failure of one of the servers.

For example, you can :

• add a reverse-proxy server upstream of the 2 WEB servers

• add a 3rd WEB server and better distribute the load (manage fault tolerance)

• replace simple MASTER / SLAVE replication with a database cluster, requiring at least 3 DB nodes

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What flows does GLPI use?

Mandatory flows

From	To	Prot./Appli.	Port	Comment
User	GLPI	HTTP(S)	80 (443)	http(s) : //glpi/
GLPI	Databases	MySQL	3306	Another port can be configured

Optional Flows - LDAP/CAS connection

From	To	Prot./Appli.	Port	Comment
GLPI	LDAP directory	LDAP(S)	389 (636)	Synchronization and user authentication

Optional flows - MAIL connection

From	To	Prot./Appli.	Port	Comment
GLPI	Mail server	SMTP(S)	25 (465), 587	Send email notifications
GLPI	Mail server	IMAP(S)	143 (993)	Mail retrieval (receiver) > ticket creation

Optional flows - GLPI Inventory Basic module (inventory)

From	To	Prot./Appli.	Port	Comment
Agents	Server	HTTP(S)	80 (443)	http(s) : //glpi/plugins/fusioninventory/
GLPI	Agents	HTTP	62354	Remote agent wake-up (from GLPI)

Optional flows - GLPI Inventory Advanced modules

From	To	Prot./Appli.	Port	Comment
Agents	Equip.	SNMP	161,162	Network inventories
Agents	Equip.	NMAP	ICMP,DNS	Network discovery
Agents	VMWARE	HTTPS	443	VMWare inventory

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Where can I find the GLPI database schema?

You can find the database schemas for GLPI 10 and GLPI 11 at the URL below.

GLPI Database Documentation (dbdocs)dbdocs.glpi-project.org

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More Ressources :

• Apache

• Nginx

• PHP

• MariaDB

• MySQL