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VM Preparation Guide#


This document provides instructions for preparing a VM for a single-node Gluu Server deployment. Once the server is ready, install Gluu on one of the supported operating systems.

System Requirements#

Testing Environment#

A barebones Gluu Server can be set up with only oxAuth, oxTrust, LDAP, and SAML IDP as a test or demo environment. The minimum requirements for this deployment are:

  • 4 GB RAM
  • 2 GB swap space
  • 2 CPU units
  • 40 GB disk space

Production Environment#

The minimum requirements for a production environment with the same services (oxAuth, oxTrust, LDAP, and SAML IDP) are:

  • 8 GB RAM
  • 4 GB swap space
  • 4 CPU units
  • 50 GB disk space
Service CPU Unit RAM Required Comments
oxAuth 2.5 2.5GB Yes
oxTrust 1.0 2.0GB Yes
LDAP 1.5 2GB If not using couchbase Recommended RAM dependent on size
fido2 0.5 0.5GB No
scim 1.0 1.0GB No
config - job 0.5 0.5GB No Required if Cloud Native
jackrabbit 1.5 1GB No Required if Cloud Native
persistence - job 0.5 0.5GB No Required if Cloud Native
SAML IDP 1.0 1.0GB No
oxPassport 0.7 0.9GB No
oxd-server 1 0.4GB No
nginx 1 1GB Yes if not ALB
key-rotation 0.3 0.3GB No
cr-rotate 0.2 0.2GB No
casa 0.5 0.5GB No
radius 0.7 0.7GB No
Each deployment will have unique requirements depending on its architecture, services, and number of users. The following table contains some recommended resources to start with. These requirements should be adjusted to suit the specific deployment.
Service CPU Unit RAM Comments
fido2 0.5 0.5GB
scim 1.0 1.0GB
config - job 0.5 0.5GB Required if Cloud Native
jackrabbit 1.5 1GB Required if Cloud Native
persistence - job 0.5 0.5GB Required if Cloud Native
SAML IDP 1.0 1.0GB
oxPassport 0.7 0.9GB
oxd-server 1 0.4GB
nginx 1 1GB
key-rotation 0.3 0.3GB
cr-rotate 0.2 0.2GB
casa 0.5 0.5GB
radius 0.7 0.7GB
  • Gluu must be deployed on a server or VM with a static IP Address. The static IP address should resolve to a computer hostname which can be achieved by adding an entry to the DNS server or in /etc/hosts.

  • If setting up a VM locally, we recommend using VM Player (not Virtual Box).

Supported Operating Systems#

Deploy Gluu on a server or VM with one of the following supported operating systems:


The following ports are open to the Internet by default.

Port Number Protocol Notes
80 tcp Forwards to 443
443 tcp apache2/httpd
22 tcp ssh


See the operations guide for a list of internal ports used by Gluu Server components (e.g. oxAuth, oxTrust, etc.).

To check the status of these ports in Ubuntu, use the following commands (other OS have similar commands):

ufw status verbose

If the status is found to be inactive, run the ufw enable command.

The default for ufw is to deny incoming and allow outgoing. To reset your setting to default :

ufw default deny incoming
ufw default allow outgoing

reset ufw

ufw reset

If for any reason the ports are closed, allow connections by:

ufw allow <port>

Ports 443, 80, and 22 must be accessible.


For clustered deployments, more ports must be configured.

File Descriptors (FD)#

The Gluu Server requires setting the file descriptors to 65k.

Follow these steps or research how to do this on your Linux platform.

  • Add the following lines in the /etc/security/limits.conf file.
* soft nofile 65535
* hard nofile 262144
  • Add the following lines to /etc/pam.d/login if not already present.
session required
  • Increase the FD limit to 65535. The system file limit is set in /proc/sys/fs/file-max.

It is recommended to check the FD limit before increasing it. If this limit is customized and more than default, we recommend using the higher one. The FD limit can be found using the following command.

# cat /proc/sys/fs/file-max

Please note, the command may vary depending on the OS in use.

echo 65535 > /proc/sys/fs/file-max**
  • Use the ulimit command to set the FD limit to the hard limit specified in /etc/security/limits.conf.
ulimit -n 262144


CentOS by default will not accept more than the default maximum of 65535. You may get an error while performing the above command.

If the above does not work, use the ulimit command to set the FD limit to the soft limit of the file /etc/security/limits.conf

ulimit -n 65535
  • Restart the system.

IP Address#

The Server or VM must be deployed on a static IP address. Cloud servers should already have that set. When installing the Gluu Server, make sure the server has a static IP.


Create a file named /etc/sysconfig/network-scripts/ifcfg-eth0 containing the following information:

IPADDR=  <replace with your IP>

Restart the network service: systemctl restart network

Other Operating Systems#

Open the following using any editor:

vi /etc/network/interfaces

Below is the network configuration. Notice iface ens33 inet is set to dhcp.

#This file describes the network interfaces available on your system
#and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto ens33
iface ens33 inet dhcp

Comment out the line that contains the dhcp by adding # in front of it and add the values for the address, netmask, network, broadcast, gateway, and dns-nameservers of the network, as seen in the example below:

#This file describes the network interfaces available on your system
#and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto ens33
#iface ens33 inet dhcp
iface ens33 inet static
    # This value is an example
    # This value is an example
    # This value is an example
    network #
    # This value is an example
    # This value is an example

# This value is an example
dns-nameservers # This value is an example

Restart the network service:

service networking restart

/etc/init.d/networking restart

Restart the server.

In the case of Ubuntu 18 or higher, use the file present in /etc/netplan to set the static IP address.

Fully Qualified Domain Name (FQDN)#

Gluu must be deployed on a fully qualified domain name (FQDN), e.g. Localhost is not supported.

In Linux, edit the hosts file and add the appropriate IP Address and FQDN. For example:

vi /etc/hosts
If the IP was, and the FQDN was, add this to all hosts files:


The Windows hosts file is located at C:\Windows\System32\drivers\etc\hosts

Cloud-specific notes#

Amazon AWS#

Amazon AWS instances provide a public and private IP address. While running the /install/community-edition-setup/ script, use the Private IP address. Also, use a hostname other than the long default hostname that Amazon provides as CN(Canonical Name). Update the DNS or hosts file accordingly.

Google Cloud Platform#

Gluu Server installation in GCP is pretty straight forward. We need to check a couple of points for this installation:

  • Deployer must select supported operating system and required resources.
  • Enable 'HTTPS' from 'Firewall'
  • Do not enter any IP during the installation of Gluu Server, the setup script will automatically gather appropriate IP information.
  • When accessing the newly installed Gluu server from a browser, update the DNS or hosts file accordingly.

A video tutorial is also available in the Gluu channel

Microsoft Azure#

Accessing the Gluu Server on Azure can be a little tricky because of the Public/Private IP. Azure assigns new Public/Private IP addresses each time the server is started.

Follow these steps to set up the VM on Azure:

  1. Log into Windows Azure Administrative Panel

  2. Navigate to Virtual Machines > Create a Virtual Machine

  3. From the menu, choose Compute > Virtual Machine > From Gallery branch.

  4. Choose the operating system. Remember to set selinux to permissive if you choose CentOS.

  5. Provide a name for the VM in the Virtual Machine Name field and use Standard for Tier.

  6. Select a server with at least 4GB RAM in the Size dropdown menu.

  7. Provide a username/password to connect via SSH and upload an SSH certificate. Click Next.

  8. Create a new cloud service and select None for the Availability Set option. * Endpoints Section: This is where port forwarding is set so that the internal IP address can be selectively reachable from the outside world. By default, only tcp /22 is there for SSH. The public ports for http and https (tcp ports 80 and 443) have to be added and mapped to the same private ports. If the cloud mappings are flagged as conflicting, proceed without setting them. Remember to set them after the creation of the VM. Then, click Next.

  9. Choose not to install VM Agent and click the tick button to finalize the VM.

  10. Go to the Dashboard tab of VM Management Panel and copy the DNS Name. This is the name that is used to access the Gluu Server.

  11. SSH to the server and proceed with the installation.

Linode VM#

Linode Virtual Machines (VM) use a custom kernel which is not supported by the Gluu Server, therefore the kernel must be updated before the Gluu Server can be installed in a Linode VM. The following steps will guide you through kernel update in the Linode VM.

  • Check for the current version of the kernel. If the output contains -Linode, then proceed

    # uname -a

  • Run the following command to update the kernel:

    # apt-get install linux-image-virtual grub2

  • Modify grub file in the /etc/default/ folder:

    # vim /etc/default/grub

  • Ensure that the following lines are present in the grub file

    GRUB_SERIAL_COMMAND="serial --speed=19200 --unit=0 --word=8 --parity=no --stop=1"

  • Finally run the following commands to update grub and reboot:

    # update-grub
    # reboot