Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
|
litespeed_wiki:lslb:ha [2019/02/11 20:50] Jackson Zhang [How to Enable High Availability for Web ADC] |
litespeed_wiki:lslb:ha [2019/04/12 18:08] Michael Alegre [Check HA Status for Both Nodes] Adjusted image properties. |
||
|---|---|---|---|
| Line 47: | Line 47: | ||
| File Cache Server Address 10.10.30.96:1447 | File Cache Server Address 10.10.30.96:1447 | ||
| | | ||
| - | {{ :litespeed_wiki:lslb:adc-ha-configuration-ha1.png?800 |}} | + | {{ :litespeed_wiki:lslb:adc-ha-configuration-ha1.png?nolink |}} |
| Click **Add** in **HA Interfaces** to add a Virtual IP: | Click **Add** in **HA Interfaces** to add a Virtual IP: | ||
| - | {{ :litespeed_wiki:lslb:adc-ha-configuration-ha1-add-internface.png?800 |}} | + | {{ :litespeed_wiki:lslb:adc-ha-configuration-ha1-add-internface.png?nolink |}} |
| After a VIP has been added through the GUI, the configuration will be added to the Keepalived configuration and it will look like this: | After a VIP has been added through the GUI, the configuration will be added to the Keepalived configuration and it will look like this: | ||
| Line 88: | Line 88: | ||
| File Cache Server Address 10.10.30.97:1447 | File Cache Server Address 10.10.30.97:1447 | ||
| | | ||
| - | {{ :litespeed_wiki:lslb:adc-ha-configuration-ha1.png?800 |}} | + | {{ :litespeed_wiki:lslb:adc-ha-configuration-ha1.png?nolink |}} |
| Click **Add** in **HA Interfaces** to add a Virtual IP: | Click **Add** in **HA Interfaces** to add a Virtual IP: | ||
| - | {{ :litespeed_wiki:lslb:adc-ha-configuration-ha2-add-internface.png?800 |}} | + | {{ :litespeed_wiki:lslb:adc-ha-configuration-ha2-add-internface.png?nolink |}} |
| After a VIP has been added through the GUI, the configuration will be added to the Keepalived configuration, and it will look like this: | After a VIP has been added through the GUI, the configuration will be added to the Keepalived configuration, and it will look like this: | ||
| Line 187: | Line 187: | ||
| On Node 1: | On Node 1: | ||
| - | {{ :litespeed_wiki:lslb:adc-ha-configuration-ha1-status.png?800 |}} | + | {{ :litespeed_wiki:lslb:adc-ha-configuration-ha1-status.png?nolink |}} |
| On Node 2: | On Node 2: | ||
| - | {{ :litespeed_wiki:lslb:adc-ha-configuration-ha2-status.png?800 |}} | + | {{ :litespeed_wiki:lslb:adc-ha-configuration-ha2-status.png?nolink |}} |
| ===== Fixing Out of Sync Replication ===== | ===== Fixing Out of Sync Replication ===== | ||
| Line 209: | Line 209: | ||
| With IP failover, we recommend listening on ''*:<port>'', instead of individual ''<IP>:<port>''. | With IP failover, we recommend listening on ''*:<port>'', instead of individual ''<IP>:<port>''. | ||
| - | {{ :litespeed_wiki:lslb:adc-ha-configuration-listener.png?800 |}} | + | {{ :litespeed_wiki:lslb:adc-ha-configuration-listener.png?nolink |}} |
| Virtual Host: | Virtual Host: | ||
| - | {{ :litespeed_wiki:lslb:adc-ha-configuration-vhost.png?800 |}} | + | {{ :litespeed_wiki:lslb:adc-ha-configuration-vhost.png?nolink |}} |
| - | {{ :litespeed_wiki:lslb:adc-ha-configuration-vhost2.png?800 |}} | + | {{ :litespeed_wiki:lslb:adc-ha-configuration-vhost2.png?nolink |}} |
| ClusterHTTP setup: | ClusterHTTP setup: | ||
| - | {{ :litespeed_wiki:lslb:adc-ha-configuration-clusterhttp.png?800 |}} | + | {{ :litespeed_wiki:lslb:adc-ha-configuration-clusterhttp.png?nolink |}} |
| - | {{ :litespeed_wiki:lslb:adc-ha-configuration-clusterhttp-2.png?800 |}} | + | {{ :litespeed_wiki:lslb:adc-ha-configuration-clusterhttp-2.png?nolink |}} |
| - | {{ :litespeed_wiki:lslb:adc-ha-configuration-clusterhttp-3.png?800 |}} | + | {{ :litespeed_wiki:lslb:adc-ha-configuration-clusterhttp-3.png?nolink |}} |
| - | {{ :litespeed_wiki:lslb:adc-ha-configuration-clusterhttp-4.png?800 |}} | + | {{ :litespeed_wiki:lslb:adc-ha-configuration-clusterhttp-4.png?nolink |}} |
| ===== Testing VIP ===== | ===== Testing VIP ===== | ||
| Line 234: | Line 234: | ||
| 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 | ||
| Line 240: | Line 240: | ||
| 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. | ||
| + | |||
| + | ==== Keepalived Indicates Multiple Masters ==== | ||
| + | When the configured VIP is shown on multiple nodes, it usually indicates a Split-Brain issue with keepalived. | ||
| + | |||
| + | Keepalived defaults to using multicast packets. Please verify that multicast packets are not filtered/blocked by your firewall. | ||
| ===== Alternative ===== | ===== Alternative ===== | ||