Chapter 1. Introduction

OpenShift Aggregated Logging is based on the OpenShift Logging stack running on OpenShift Container Platform (OCP). Ansible is used to install OpenShift Aggregated Logging using OpenShift Ansible logging roles.

1.1. System Requirements

  • 4 cores, 16GB RAM, and 500GB disk for an environment with 50 hosts.
  • Red Hat highly recommends using SSD disks.
  • OpenShift Aggregated Logging requires RHEL 7.5.

1.2. Prerequisites

Metrics Store Machine Prerequisites

  1. Add the hostname of the OpenShift Aggregated Logging machine to your enterprise hostname resolution system, for example, DNS.

  2. Add the following aliases:

    • es.FQDN for Elasticsearch

    • kibana.FQDN for Kibana

      where FQDN is the hostname and domain of the OpenShift Aggregated Logging machine.

  3. The machine must meet all Minimum Hardware Requirements detailed in the Masters section.

  4. Ensure that libvirt is not installed on the machine: 

    # rpm -qa | grep libvirt

    If libvirt is installed, remove it from the machine: 

    # yum remove libvirt*
  5. Create a preallocated 500GB partition called /var, which will be used for persistent storage. Do not use root (/).
Important

XFS is the only supported file system for persistent storage.

Manager Machine Prerequisites

Ensure that the time stamp in the /var/log/ovirt-engine/engine.log file contains a UTC offset suffix, rather than a letter such as Z or A. For example: 2018-03-27 13:35:06,720+01