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--- litespeed_wiki:lslb:ha [2018/08/03 18:24]
Jackson Zhang
+++ litespeed_wiki:lslb:ha [2018/08/03 18:28]
Jackson Zhang [Replication our of sync? What required?]
@@ Line 177: / Line 177: @@
 You can see VIP 10.10.31.31 is assigned to node 2 now.
+IP failover is completely handled by keepalived, it only happens when one server is completely down, the other server will take over the IP. Shutingdown LS ADC won't trigger an IP failover.
+For more fancy failover method, you may want to try BGP, like what cloudflare does, but it is not controlled by ADC.
+https://blog.cloudflare.com/cloudflares-architecture-eliminating-single-p/
 ===== Check HA Status for both nodes =====
@@ Line 192: / Line 199: @@
 Sometime you may see replication out of sync.
-You will need to make sure node 1 and node 2 are configurated the same way. If they are configurated different way, you can not expect HA/Replication working.
+  - You will need to make sure node 1 and node 2 are configurated the same way. If they are configurated different way, you can not expect HA/Replication working.
+  - If one ADC instance is down, the replication will be out of sync, that's expected, the ADC will try to restore synchronization in short time.
 ===== Verify your listener,virtualhost, ClusterHTTP setup correctly =====