How do I renew the credentials for a datastore connection between ESXi and a QNAP NAS?
To renew the credentials, follow the steps below.
Part 1: Enable ESXi Shell
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Log into a vCenter Server system using vSphere Client.
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In the Inventory panel, select the host.
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Click the Configure tab, and then select System > System.
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For each of the following services, click Edit Startup Policy, select Start and stop manually, and then click Start to enable the service.
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ESXi Shell
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SSH
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Direct Console UI
Note: If you want the service to start whenever you restart the host, select Start and stop with host.
Step 2: Delete existing krb5 NFS credentials
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Log into the target ESXi server using an SSH client, such as PuTTY.
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Go to the following directory:
/tmp/nfsgssd_krb5cc
3. Locate the existing credentials file using the klist command, and then delete the credentials file using the rm command.
Step 3: Renew krb5 NFS credentials
1. On the NAS, ensure that the NAS has joined the domain.
2. Disable and then re-enable the NFSv4 service.
3. In ESXi, remount the NAS NFS shared folders using the Kerberos option krb5 or krb5i.
When the mount operation has finished, a new Kerberos credential is created on the ESXi server at /tmp/nfsgssd_krb5cc.
4. Using the klist command, verify that the Kerberos credentials file exists and is valid.
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