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litespeed_wiki:lslb:ha [2019/02/11 20:50] Jackson Zhang [How to Enable High Availability for Web ADC] |
litespeed_wiki:lslb:ha [2019/03/18 12:21] Kevin Fwu |
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| When making changes to the configuration, such as changing the listener from ''<IP>:443'' to ''*:443'', a full stop/start is required. | When making changes to the configuration, such as changing the listener from ''<IP>:443'' to ''*:443'', a full stop/start is required. | ||
| - | ==== Inconsistent HA Configuraton Between Boxes ==== | + | ==== Inconsistent HA Configuraton Between Boxes ==== |
| When you see an error similar to the following: | When you see an error similar to the following: | ||
| 2018-08-03 16:24:20.099467 [WARN] [REPL] HA configures are inconsistent between boxes, full replicaton can't proceed | 2018-08-03 16:24:20.099467 [WARN] [REPL] HA configures are inconsistent between boxes, full replicaton can't proceed | ||
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| It is because the configuration is out of sync between two LS ADC instances. Replication only works if the two ADCs are serving the exact same sites. You need to keep ADC configuration in sync. If it is out of sync temporarily, it will break the synchronization. Once the configurations are synced, ADC will restore replication synchronization. | It is because the configuration is out of sync between two LS ADC instances. Replication only works if the two ADCs are serving the exact same sites. You need to keep ADC configuration in sync. If it is out of sync temporarily, it will break the synchronization. Once the configurations are synced, ADC will restore replication synchronization. | ||
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| + | ==== Keepalived Indicates Multiple Masters ==== | ||
| + | When the configured VIP is shown on multiple nodes, it usually indicates a Split-Brain issue with keepalived. | ||
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| + | Keepalived defaults to using multicast packets. Please verify that multicast packets are not filtered/blocked by your firewall. | ||
| ===== Alternative ===== | ===== Alternative ===== | ||