RSF-1 for ZFS - Administrator's Guide

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2021-03-30 11:15

RSF-1 provides Enterprise-Grade High Availability for ZFS storage servers and includes simple configuration and administration interfaces. The following chapters provide comprehensive details about the installation and use of RSF-1.

Installation

Quick Start Guide

The following chapters provide in-depth information about the configuration and use of an RSF-1 cluster. For a brief overview of using RSF-1 to provide High Availability for a ZFS pool, see the QuickStart Guide.

Cluster Creation

Services

A service is an entity that the RSF-1 cluster can move between nodes. Although any individual service can run on only 1 cluster node at a time, if there are multiple services configured they can start, stop and move independently, allowing for an Active/Active cluster configuration.

In the case of a ZFS cluster, each service adopts the name of the pool that it controls.

Service Creation

The following sections describe the process of creating a new service to put a ZFS pool under cluster control.

Additional ZFS Pools

By default, each service will adopt the name of a ZFS pool and will take control of that pool. However it is possible to add additional pools to a service. If there are multiple pools controlled by one service, those pools will failover together and always be imported on the same node as each other. The following sections give more details about additional pools in a ZFS service:

Heartbeats

Heartbeats are a fundamental part of any RSF-1 cluster. They provide the communication channel that allows each cluster node to monitor the status of each other node in the cluster. The following sections describe the different types of heartbeat available and how to configure the heartbeats in a cluster.

Controling a Service

Each service in the cluster has its own state and can be controlled independently. See the following sections for more information on controlling a service:

Failover

When RSF-1 detects the failure of a service, it will attempt to failover that service to another node in the cluster. The following sections provide details about service failovers:

  • Moving a service manually
  • What causes a service to failover?
  • What happens when a service fails over?
  • How to temporarily prevent a failover

Shares

The following sections provide information about creating shares from a clustered ZFS pool

  • Creating file shares
  • Creating block shares (Logical Units)

Cluster Properties

There are a number of properties that are available for tuning an RSF-1 cluster. During the initial package installation, these properties are set to sensible default settings and the recommendation is always to avoid changing away from those defaults. However, if necessary, those settings can be changed easily. See the page below for details about the available cluster properties:

  • Cluster properties
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