[LU-8405] MGT should check servicenode nid before accepting mount

• Type: Bug
• Resolution: Unresolved
• Priority: Major
• Affects Version/s: Lustre 2.7.0
• Severity: 3
• Assignee: Hongchao Zhang
• Reporter: Gary Hagensen (Inactive)

Description

The MGS will just accept a mount request even if the servicenode arguments are invalid nids. This results in the OST going to "partial connect: state when the MDT tried to use the bad nids and also the mount being put into the replay log, so that the partial attach never goes away. It survives a reboot, lustre_rmmod and remount of the MGT and MDT.It gets replayed.

The MGS should check all the failover nids (even a simple lctl ping) before accepting the mount, Allowing it to be accepted causes too many problems downstream.