Chapter 2. System Requirements
This chapter outlines the minimum hardware and software requirements to install Red Hat Gluster Storage Web Administration.
Ensure that all the requirements are met before the installation starts. Missing requirements can result in Red Hat Gluster Storage Web Administration environment not functioning as expected.
The Red Hat Gluster Storage Web Administration environment requires:
- One machine to act as the management server
- One or more machines to act as storage servers. At least three machines are required to support replicated volumes
- One or more machines to be used as clients to access the Web Administration interface
2.1. Requirements for Web Administration Server System
On the system to be designated as the Web Administration server, verify that these recommended hardware and software requirements are met.
2.1.1. Hardware Requirements
The following are the different hardware requirements based on different cluster configurations:
2.1.1.1. Small Cluster Configuration
- Number of nodes: upto 8 nodes
- Number of volumes: upto 6-8 volumes per cluster
- Number of bricks per node for replicated volumes: upto 2-3 bricks
- Number of bricks per node for Erasure Coded volumes: upto 12-36 bricks
Recommended Requirements
- 4 vCPUs
- 4 GB of available system RAM
- One Network Interface Card (NIC) with bandwidth of at least 1 Gbps
Additional Storage Devices
For hosting etcd data directory:
- Storage disk size: 20 GB per cluster
- Filesystem format: XFS
-
Mounting directory:
/var/lib/etcd
For hosting time-series data from Graphite, Carbon, and Whisper applications:
- Storage disk size: 200 GB per cluster
- Filesystem format: XFS
-
Mounting directory:
/var/lib/carbon
For more information on how to prepare and mount the additional disks, see the Creating a Partition and Mounting a File System sections in the Red Hat Enterprise Linux Storage Administration Guide.
2.1.1.2. Medium Cluster Configuration
- Number of nodes: 9-16 nodes
- Number of volumes: upto 6-8 volumes per cluster
- Number of bricks per node for replicated volumes: upto 2-3 bricks
- Number of bricks per node for Erasure Coded volumes: upto 12-36 bricks
Recommended Requirements
- 4 vCPUs
- 6 GB of available system RAM
- One Network Interface Card (NIC) with bandwidth of at least 1 Gbps
Additional Storage Devices
For hosting etcd data directory:
- Storage disk size: 20 GB per cluster
- Filesystem format: XFS
-
Mounting directory:
/var/lib/etcd
For hosting time-series data from Graphite, Carbon, and Whisper applications:
- Storage disk size: 350 GB per cluster
- Filesystem format: XFS
-
Mounting directory:
/var/lib/carbon
2.1.1.3. Large Cluster Configuration
- Number of nodes: 17-24 nodes
- Number of volumes: upto 6-8 volumes per cluster
- Number of bricks per node for replicated volumes: upto 2-3 bricks
- Number of bricks per node for Erasure Coded volumes: upto 12-36 bricks
Recommended Requirements
- 6 vCPUs
- 6 GB of available system RAM
- One Network Interface Card (NIC) with bandwidth of at least 1 Gbps
Additional Storage Devices
For hosting etcd data directory:
- Storage disk size: 20 GB per cluster
- Filesystem format: XFS
-
Mounting directory:
/var/lib/etcd
For hosting time-series data from Graphite, Carbon, and Whisper applications:
- Storage disk size: 500 GB per cluster
- Filesystem format: XFS
-
Mounting directory:
/var/lib/carbon
2.1.2. Software Requirements
Red Hat Gluster Storage Web Administration is supported on Red Hat Enterprise Linux 7.5 64-bit version.
Table 2.1. Software Requirements
| Software | Name and Version |
|---|---|
| Operating System | Red Hat Enterprise Linux 7.5 |
2.2. Requirements for Red Hat Gluster Storage Nodes
Ensure the following requirements are met on the Red Hat Gluster Storage nodes:
- Red Hat Enterprise Linux 7.5
- Red Hat Gluster Storage servers updated to the latest Red Hat Gluster Storage version 3.4 or greater. For detailed instructions on the upgrade process, see the Upgrading Red Hat Storage section in the Red Hat Gluster Storage Installation Guide.
Minimum hardware requirements
NoteFor more information, see the knowledge base article on Red Hat Gluster Storage Hardware Compatibility.
- Network Time Protocol (NTP) setup
- Firewall access to ports
For detailed information on prerequisites and setting up Red Hat Gluster Storage server, see the Red Hat Gluster Storage 3.4.0 Installation Guide.
2.3. Requirements for the Client System
The Red Hat Gluster Storage Web Administration environment can be accessed by a client machine with the following web browser compatibility:
Table 2.2. Web Browser Compatibility
| Software | Name and Version |
|---|---|
| Web Browser | Mozilla Firefox 38.7.0 or later |
| Web Browser | Google Chrome 46 or later |
2.4. Firewall Configuration
Automated Firewall Setup
In this version of Red Hat Gluster Web Administration, firewall configuration is automated by Ansible automation. The tendrl-ansible installer configures the firewall during Web Administration installation as the variable *configure_firewalld_for_tendrl* is set to True by default. This automation opens all the required ports for the Web Administration environment.
To automatically configure the firewall, follow the Web Administration installation process. See the Web Administration installation section in the Quick Start Guide for details.
For tendrl-ansible to automate firewall setup, ensure the firewalld service is configured and enabled. For instructions, see Configuring Firewalld section in the Red Hat Enterprise Linux Security guide.
Manual Firewall Setup
To manually configure firewall for Web Administration services:
- Open the ports before manually configuring firewall
-
Set the variable configure_firewalld_for_tendrl to False in the
site.ymlplaybook.
The site.yml playbook file is created as part of the Web Administration Ansible installation process. For details, see the Web Administration Installation process of this guide.
- Run the site.yml playbook file.
The list of the ports and the port numbers are given in the table below:
Table 2.3. Web Administration Port Numbers
| TCP Port Numbers | Usage |
|---|---|
| 2379 | For etcd |
| 2003 | For Graphite |
| 10080 | For GraphiteWeb |
| 80 or 443 | For tendrl http or https |
| 3000 | For Grafana Server |
| 8789 | For tendrl-monitoring-integration |
To use Firewalld to open a particular port, run:
# firewall-cmd --zone=zone_name --add-port=5667/tcp # firewall-cmd --zone=zone_name --add-port=5667/tcp --permanent
To use iptables to open a particular port, run:
# iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 5667 -j ACCEPT # service iptables save
To be able to execute the iptables commands successfully, ensure the iptables-services package is installed. To install the iptables-services package, run yum install iptables-services.
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