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Top Forums UNIX for Advanced & Expert Users Ha mailserver, is possible active/active with "constant" connection? Post 303045628 by hicksd8 on Saturday 4th of April 2020 02:09:53 PM
Old 04-04-2020
You problem is with network timeout settings; either the cluster or the clients.

Manually shutting down one of the cluster nodes may not give you the same result as a true CPU/power/whatever failure because the cluster software suite will probably see you do that. It would be better to simply pull out the RJ45 network connection to one of them simulating a network connection failure.

Anyway, the point is that a cluster failover takes time. During this time the virtual ip address is switched from one node to the other. Depending on the cluster suite this will take seconds/minutes. The fact that the client will reconnect to the surviving cluster node after you restart it proves that, had it waited long enough, it would have been able to reconnect on its own.

So the solution is to either (1) configure the cluster to failover faster, or (2) increase the timeout that clients will wait before giving up. That means that a new connection to the virtual ip address can be made before the configured timeout period ends.
 

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cmdeleteconf(1m)														  cmdeleteconf(1m)

NAME
cmdeleteconf - Delete either the cluster or the package configuration SYNOPSIS
cmdeleteconf [-f] [-v] [-c cluster_name] [[-p package_name]...] DESCRIPTION
cmdeleteconf deletes either the entire cluster configuration, including all its packages, or only the specified package configuration. If neither cluster_name nor package_name is specified, cmdeleteconf will delete the local cluster's configuration and all its packages. If the local node's cluster configuration is outdated, cmdeleteconf without any argument will only delete the local node's configuration. If only the package_name is specified, the configuration of package_name in the local cluster is deleted. If both cluster_name and pack- age_name are specified, the package must be configured in the cluster_name, and only the package package_name will be deleted. cmdelete- conf with only cluster_name specified will delete the entire cluster configuration on all the nodes in the cluster, regardless of the con- figuration version. The local cluster is the cluster that the node running the cmdeleteconf command belongs to. Only a superuser, whose effective user ID is zero (see id(1) and su(1)), can delete the configuration. To delete the cluster configuration, halt the cluster first. To delete a package configuration you must halt the package first, but you do not need to halt the cluster (it may remain up or be brought down). To delete the package VxVM-CVM-pkg (HP-UX only), you must first delete all packages with STORAGE_GROUP defined. While deleting the cluster, if any of the cluster nodes are powered down, the user can choose to continue deleting the configuration. In this case, the cluster configuration on the down node will remain in place and, therefore, be out of sync with the rest of the cluster. If the powered-down node ever comes up, the user should execute the cmdeleteconf command with no argument on that node to clean up the config- uration before doing any other Serviceguard command. Options cmdeleteconf supports the following options: -f Force the deletion of either the cluster configuration or the package configuration. -v Verbose output will be displayed. -c cluster_name Name of the cluster to delete. The cluster must be halted already, if intending to delete the cluster. -p package_name Name of an existing package to delete from the cluster. The package must be halted already. There should not be any packages in the cluster with STORAGE_GROUP defined before having a package_name of VxVM-CVM-pkg (HP-UX only). RETURN VALUE
Upon completion, cmdeleteconf returns one of the following values: 0 Successful completion. 1 Command failed. EXAMPLES
The high availability environment contains the cluster, clusterA , and a package, pkg1. To delete package pkg1 in clusterA, do the following: cmdeleteconf -f -c clusterA -p pkg1 To delete the cluster clusterA and all its packages, do the following: cmdeleteconf -f -c clusterA AUTHOR
cmdeleteconf was developed by HP. SEE ALSO
cmcheckconf(1m), cmapplyconf(1m), cmgetconf(1m), cmmakepkg(1m), cmquerycl(1m). Requires Optional Serviceguard Software cmdeleteconf(1m)
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