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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.
Attention: 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.
The node uses the DNS server settings specified on this page to reconnect to the KMS,
allowing data on the node to be decrypted.
5. After node data is decrypted, reboot the node. From the StorageGRID Appliance Installer,
select Advanced > Reboot Controller, and then select one of these options:
•
Select Reboot into StorageGRID to reboot the controller with the node rejoining the grid.
Select this option if you are done working in maintenance mode and are ready to return the
node to normal operation.
Hardware Installation and Maintenance Guide for SG100 and SG1000 Appliances
95
Maintaining the appliance