event occurs only after a node_up_remote event has successfully completed.

Sequence of node_down Events

node_downThis event occurs when a node intentionally leaves the cluster or fails. Depending on whether the exiting node is local or remote, this event initiates either the node_down_local or node_down_remote event, which in turn initiates a series of subevents.

node_down_local

Processes the following events:

stop_server

Stops application servers.

release_takeover_addr

(If configured for IP address takeover.) Identifies

 

a takeover address to be released because a

 

standby adapter on the local node is

 

masquerading as the service address of the

 

remote node. Reconfigures the local standby

 

with its original IP address (and hardware

 

address, if necessary).

release_vg_fs

Releases volume groups and file systems that

 

are part of a resource group the local node is

 

serving.

release_service_addr

(If configured for IP address takeover.)

 

Detaches the service address and reconfigures

 

the service adapter to its boot address.

node_down_remote

Processes the following events:

acquire_takeover_addr

(If configured for IP address takeover.) Checks

 

for a configured standby address currently seen

 

as up by the Cluster Manager, and then does a

 

standby_address to takeover_address swap

 

(and hardware address, if necessary.

get_disk_vg_fs

Acquires disk, volume group, and file system

 

resources as part of a takeover.

node_down_complete

This event occurs only after a node_down event

 

has successfully completed. Depending on

 

whether the node is local or remote, this event

 

initiates either a node_down_local_complete or

 

node_down_remote_complete event.

Cluster Customization 119

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IBM SG24-5131-00 manual Sequence of nodedown Events, Nodedownlocal, Releaseserviceaddr, Nodedownremote, Nodedowncomplete