• Iustin Pop's avatar
    Disable cluster init with a reachable IP · 411f8ad0
    Iustin Pop authored
    Make the cluster init fail if the IP to which the cluster name resolved
    is already reachable by the master node. This is not a foolproof
    solution, but it allows a cheap method of detecting simple mistakes.
    It will also disallow using the master node name as cluster name (which
    is something good).
    The only drawbacks that I see are:
      - you are not allowed to do this, which might come in handy in cluster
        upgrades; but since we support rename, this is mitigated
      - cluster init takes longer now (+the timeout value, set to 5
        seconds), but since this is a one-off operation, it should be ok
    Reviewed-by: ultrotter
cmdlib.py 154 KB