Node Status Test

A single Isilon cluster consists of multiple nodes, which are rack-mountable enterprise appliances. Availability of the nodes is vital for proper functioning of the storage clusters and for servicing the user requests quickly. If the node is down or goes offline, the overall performance of the cluster will degrade. This will adversely slow down the request processing ability of the storage system. To avoid this, administrators can use the Node Status test to verify if the node is functioning properly. This test auto-discovers the nodes in the storage system, and reports the current status of each node.

Target of the test : An EMC Isilon Storage System

Agent deploying the test : A remote agent

Outputs of the test : One set of results for each node on the target storage system being monitored.

Configurable parameters for the test
Parameter Description

Test Period

How often should the test be executed.

Host

The IP address of the host for which this test is to be configured.

Port

The port at which the host listens. By default, this will be NULL.

Timeout

Specify the time duration (in seconds) beyond which this test should time out in the Timeout text box. The default is 10 seconds.

Use SUDO

By default, this parameter is set to No. This indicates that, by default, the eG agent will not require any special permissions to execute the commands. However, in some highly secure environments, this command cannot be executed directly as the eG agent install user is different from the root user who has the privileges to run all commands on the target storage system. In such cases, create a sudo user using the steps discussed in the Pre-requisites for Monitoring the EMC Isilon Storage System. Credentials of such a user should be specified in the Username and Password text boxes in the COMPONENTS page.

If the sudo user is Set the Use Sudo parameter to Yes. This will enable the eG agent install user to execute the commands.

Measurements made by the test
Measurement Description Measurement Unit Interpretation

Status

Indicates the current status of this node.

 

The table below summarizes the State values that this measure can report and their corresponding numeric equivalents:

State Value
Ok 0
Attention 1
Down 2
Invalid 3

Note:

By default, this measure reports the above-mentioned States while indicating the current status of each node. However, in the graph of this measure, states will be represented using their corresponding numeric equivalents only.