Administer a LogRhythm High Availability Deployment
LogRhythm High Availability is designed to help protect against downtime caused by planned or unplanned outages. It uses host-based replication technologies and constant monitoring of critical components and services.
The LogRhythm HA solution leverages SIOS products to deliver failover and data replication capabilities that are collectively called the SIOS Protection Suite (SPS). Combined with SIOS products, the LogRhythm HA solution can deliver superior uptime and flexibility to ensure that you are able to meet the constant demands of your enterprise.
This guide covers common tasks required to manage the LogRhythm High Availability (HA) Solution for both new and existing LogRhythm installations including:
- High Availability Overview
- Physical Configuration
- Logical Configuration
- Platform Updates
- LogRhythm Software Updates
Definition of High Availability Terms and Concepts
| Term | Definition |
|---|---|
| Cluster | A grouping of two or more networked servers or nodes |
| Communications Path | Physical connections between clustered servers |
| Data Replication | Software-based mirroring between servers via TCP/IP |
| Failover | The process of bringing a resource In Service when the active server or resource fails. This occurs when a node or resource failure is detected. It is also referred to as an unplanned outage |
| Heartbeat | The periodic message sent between servers to indicate the server health status |
| Host IP Address | The IP Address that is persistent to a physical system |
| Host Name | The logical name that is persistent to a physical system or node |
| In Service | The state of a resource hierarchy when it is active on a cluster node. When a resource is In Service, it is in an Active state |
| Local Recovery | Occurs when a resource failure is detected. The process involves restarting one or more resources locally and typically takes less time to recover than failover between nodes |
| Node | linked computer system that cooperates collectively with other parts of a cluster |
| Out of Service | The state of a resource hierarchy when it is not active on a node of the cluster. When a resource is Out of Service, it is in a Standby or Failed State |
| Resource | A system asset to be protected |
| Resource Hierarchy | A set of resources that are ordered in a way that models an application’s requirements |
| Shared IP Address | The logical IP Address used by protected services that can move between nodes in a cluster |
| Shared Name | The logical name used by protected services that can move between nodes in a cluster |
| Switchover | A process that takes a resource or resource hierarchy Out of Service in an orderly manner and brings them In Service on a backup system. Also referred to as a planned outage |
| Volume | Logical Volumes are partitions defined in Windows Disk Management. Depending on the appliance, they may be logical or physical volumes |