• Iustin Pop's avatar
    Fix the ReplacePrimary instance move · 70db354e
    Iustin Pop authored
    During a replace-primary instance move, on the real cluster the instance
    is temporarily started on the secondary, and as such we must check that
    the secondary node can hold it for this duration. Currently the code
    does not, and depending on cluster scoring it will put instances on such
    'bad' secondaries (usually without enough memory).
    
    This patch fixes this by adding/removing the instance as a primary on
    the secondary node; and then using the result node as the new secondary.
    (Since we're in a monad, we could have just tried the allocation and
    dropped the result, but this is more clear).
    70db354e
Cluster.hs 29.4 KB