I have a Juno multinode setup( Controller node, Network node, 2 Compute nodes) and I am trying to migrate a VM from 1 compute host to the other. I have been facing an error from sometime regarding “Permission denied, please try again”. Also when I try to do SSH from 1 host to other it asks for password and after entering the password it gives a permission denied error.

I was having a “host key verification failed” error and I followed these steps to solve that :

1. 1 Obtain a key pair (public key and private key). You can use the root key that is in the `/root/.ssh/id_rsa and /root/.ssh/id_ras.pub directories or you can generate a new key pair.

2. Enable login abilities for the Nova user.

   usermod -s /bin/bash nova
   

   Now you can switch to the Nova account by using the following command.

   su nova
   

3. Create the folder that is needed by ssh and place the private key that you obtained in step 1 into this folder.

   mkdir -p /var/lib/nova/.ssh
   cp <private key>  /var/lib/nova/.ssh/id_rsa
   cat<pub key> >> /var/lib/nova/.ssh/authorized_keys
   echo 'StrictHostKeyChecking no' >> /var/lib/nova/.ssh/config
   chmod 600 /var/lib/nova/.ssh/id_rsa /var/lib/nova/.ssh/authorized_keys
   

4. Repeat steps 2-4 on each node.

5. Ensure that the key is working properly.

   su - nova
   ssh node-another
   

After following these steps we have landed into an error “Permission denied, please try again” and also we are not able to SSH between nodes and it is asking for a password.