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LINBIT / drbd

LINBIT DRBD kernel module
https://docs.linbit.com/docs/users-guide-9.0/
GNU General Public License v2.0
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drbdadm create-md always results in "BAD LUCK, equal hashes" #81

Closed docholiday closed 11 months ago

docholiday commented 11 months ago

Hi there, I am using RHEL 9 and have installed the following packages:

drbd-selinux-9.26.0-1.el9.x86_64 drbd-utils-9.26.0-1.el9.x86_64 drbd-udev-9.26.0-1.el9.x86_64 drbd-9.26.0-1.el9.x86_64

and from elREPO: kmod-drbd9x-9.1.17-2.el9_3.elrepo.x86_64

When I try to create a resource with drbdadm create-md myresourcename

I get the result: BAD LUCK, equal hashes

I got this error even before installing the kmod package, but then it was

modinfo: ERROR: Module drbd not found.
BAD LUCK, equal hashes

Do I have to reset something, due to the fact that I ran the command already, when the module was not present? Or what could be the problem here?

I searched the web for answers, but found exactly nothing. Seems like I'm the first one, to get that error...

dvance commented 11 months ago

This error is hinting to issues with the node ID hashes. drbdadm tries to generate node IDs based on the node names and IPs. If you're really unlucky it could be a genuine hash collision. More likely this is a misconfiguration issue with the same node specified twice or something similar. Regardless, you should be able to resolve this by explicitly specifying node IDs.

docholiday commented 11 months ago

Thank you very much for the hint! While the hostnames where correct, I had indeed put the same IP twice in the config. After correcting that, it worked like a charm :-)