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Operating Systems AIX AIX Hardware Migration w/ HACMP...Advice Needed Post 302971778 by bakunin on Monday 25th of April 2016 02:29:38 PM
Old 04-25-2016
Quote:
Originally Posted by uzair_rock
I thought about that, but here is the issue;

Both networks have restrictions. I cannot put old IP (172.X) on the new hardware as it connect to the new network and vice versa, that is what makes it so complicated.
In this case you will have to have a downtime of some sorts. Alas, there seems to be no way around that because you need to (newly) configure HACMP on your new system and this means some downtime when you make the transition. Fortunately this downtime can be minimised pretty much by good planning.

Furthermore you haven't said anything about involved OS and HACMP versions. I suppose you will have to update at least one of them (most probably both) too.

I'd investigate the following procedure (you might have to add some things, this is just a first idea):

- Take an mksyb from the running systems, create the appropriate LPARs on the new system and try to install it from the mksysb image without any data (just the rootvg).

- Now do all the updates (start with OS, then the HACMP software) on the new systems

- get a single LUN from your SAN and configure your new cluster with the same topology as the old one, just with one test-VG on the single LUN. Use this to test your zoning, (basic) cluster setup and other details.

- Finally, after preparing your new cluster with new addresses on the new hardware you need the downtime: get the SAN people to zone the old data-LUNs to your new hardware so that the disks are seen from your cluster nodes, create the new cluster config for the imported VGs and start. You might want to add the DNS names of the old cluster service IPs as aliases to the new addresses so that the transition becomes smoother for the clients.

I hope this helps.

bakunin
 

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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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