Consider upgrade case for renew-crypto
Consider upgrade case for renew-crypto

After an upgrade from 2.12 or earlier to 2.13, all nodes
do use the same SSH key until 'gnt-cluster renew-crypto
--new-ssh-keys' is run. However, this operation
accidentally rendered the cluster uncommunicative, because
it accidentally removed the master nodes SSH key from
the nodes because it was the same as the nodes' keys at
that point.

Signed-off-by: Helga Velroyen <2d0126b1ec6f9ec5cbec4a7012aa14faeaef10f5@google.com>
Reviewed-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>

leshchevds/ganeti,mbakke/ganeti,yiannist/ganeti,bitemyapp/ganeti,leshchevds/ganeti,apyrgio/ganeti,onponomarev/ganeti,apyrgio/ganeti,mbakke/ganeti,leshchevds/ganeti,dimara/ganeti,yiannist/ganeti,mbakke/ganeti,onponomarev/ganeti,dimara/ganeti,andir/ganeti,grnet/snf-ganeti,ganeti/ganeti,yiannist/ganeti,grnet/snf-ganeti,ganeti/ganeti,ganeti/ganeti,andir/ganeti,andir/ganeti,bitemyapp/ganeti