The appliance has been
.
About this task
You might need to change the DNS server settings if an encrypted appliance cannot connect to the key
management server (KMS) or KMS cluster because the hostname for the KMS was specified as a domain
name instead of an IP address. Any changes that you make to the DNS settings for the appliance are
temporary and are lost when you exit maintenance mode. To make these changes permanent, specify the DNS
servers in Grid Manager (
MAINTENANCE
>
Network
>
DNS servers
).
• Temporary changes to the DNS configuration are necessary only for node-encrypted appliances where the
KMS server is defined using a fully qualified domain name, instead of an IP address, for the hostname.
• When a node-encrypted appliance connects to a KMS using a domain name, it must connect to one of the
DNS servers defined for the grid. One of these DNS servers then translates the domain name into an IP
address.
• If the node cannot reach a DNS server for the grid, or if you changed the grid-wide DNS settings when a
node-encrypted appliance node was offline, the node is unable to connect to the KMS. Encrypted data on
the appliance cannot be decrypted until the DNS issue is resolved.
To resolve a DNS issue preventing KMS connection, specify the IP address of one or more DNS servers in the
StorageGRID Appliance Installer. These temporary DNS settings allow the appliance to connect to the KMS
and decrypt data on the node.
For example, if the DNS server for the grid changes while an encrypted node was offline, the node will not be
able to reach the KMS when it comes back online, since it is still using the previous DNS values. Entering the
new DNS server IP address in the StorageGRID Appliance Installer allows a temporary KMS connection to
decrypt the node data.
Steps
1. From the StorageGRID Appliance Installer, select
Configure Networking
>
DNS Configuration
.
2. Verify that the DNS servers specified are correct.
3. If required, change the DNS servers.
Changes made to the DNS settings are temporary and are lost when you exit maintenance
mode.
4. When you are satisfied with the temporary DNS settings, select
Save
.
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