DNS Server

- Overview
- Before Starting
- Installing Sun Cluster HA for DNS
- Customizing Sun Cluster HA for DNS

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Overview

SunPlex Manager uses one of the following methods to install Sun Cluster HA for Domain Name Server (DNS):

- Converting an existing DNS configuration into an HA service. The configuration files must be in a global file system.
- Setting up a simple forwarding DNS configuration as a demo.

Note: You must configure DNS as a failover service.

For a more advanced configuration, you can manually customize the configuration after SunPlex Manager completes the installation. See thein.named(1M) man page for more information.

To customize your Sun Cluster HA for DNS installation, follow the procedures in the Sun Cluster documentation.

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Before Starting

Before you install the DNS package, perform the following tasks:

- Ensure that the logical host name is configured. In most cases, you set up the logical host name when you install Sun Cluster.
- If you want to use an existing DNS configuration, ensure that the configuration files are in a global directory.
- If you want to set up the simple forwarding DNS configuration, ensure that the name of a DNS server is located on your network. Also, ensure that you have a global directory available to hold the configuration file.
- Ensure that you have the CD that contains the Sun Cluster data service.

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Installing Sun Cluster HA for DNS

The DNS data service takes approximately 10 minutes to install.

Note: If you exit SunPlex Manager or click the Back button in your web browser after you begin the installation, you are disconnected from the installation. This disconnection can result in an incomplete installation because of insufficient information or an unresolved error message.

To clean up an incomplete installation, remove the application files, resources, and resource groups that were created.

The following table describes the information you must provide during installation:

Field | Description
--- | ---
Network Resource | The logical host name that is used to access DNS over the network.
Resource Name | The name of the DNS resource that is created. This name must be unique within the cluster.
Configuration Type | The configuration value. If you choose use existing, an existing DNS configuration is used. If you choose create demo the demonstration forwarding service is configured.
Update /etc/resolve.conf, /etc/inet/hosts, and /etc/nsswitch.conf on each host | The files in this directory are updated for production use. Do not modify these files until they have been updated.

Note: To test the DNS server, type nslookup [name] [logical_hostname]. The parameter name represents the name of a host to look up, and logical_hostname represents the logical host name that you specified as the network resource.

If you chose the demo configuration, you can also test the hardwired host name a.b.c, which returns IP address 1.2.3.4. This test verifies that the new DNS server is responding.

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Customizing Sun Cluster HA for DNS

For information about customizing your DNS installation, see the Sun Cluster documentation and the in.named(1M) man page.

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