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334ebfa1a2
snr_update_srv_status() and srvrq_update_srv_status() will both set or clear the server RMAINT state depending of the result of the current dns resolution. This used to work pretty well in the past, but now that addr:svc_port changes are changed atomically through a dedicated task, the change is performed asynchronously, so this can cause some flapping issues if the server is put out of maintenance while the server's address is still unassigned. To prevent errors, the resolver's code is now only allowed to put the server under maintenance but not to remove it from maintenance: the decision to remove a server from maintenance is performed by the task responsible for updating the server's addr: if the addr resolves again thanks to a valid DNS resolution and the server was previously under RMAINT, then it cleared from RMAINT state. srvrq_update_srv_status() was renamed srvrq_set_srv_down(), since it is only called to put the server in maintenance as a result of a failing SRV entry. snr_update_srv_status() was renamed srv_set_srv_down() and slightly modified so that it only takes care of putting the server under maintenance when needed. The cli command "set server x/y addr" does not need to remove the RMAINT flag anymore. |
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