add OnUpgrade callback #3
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Maybe instead of adding a new callback, call existing OnShutdown callbacks during Upgrade? |
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Just not sure if this will affect every plugin and giving unexpected behavior instead of just plugins that require closing socket |
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yup, can't do, if i call shutdown before upgrade, it would change a lot of plugins behavior because normally OnShutdown called after new forked process is up, so it's better to call different event (OnUpgrade) instead (or maybe name this OnBeforeUpgrade?) |
Signed-off-by: Kiswono Prayogo <kiswono@gmail.com>
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related to this: coredns/coredns#6074
so all plugin that require releasing port can add themself to this callback.