04-22-2016
AIX Hardware Migration w/ HACMP...Advice Needed
Hello Everyone,
Hope you all are doing great!
As you can see by the title on top, we are in the process of migrating alot of our servers from Power5 (physical) to Power8 (Virtual). Now it's turn for servers with HACMP Cluster on it. Let me lay out the environment like:
OLD ENVIRONMENT:
The Primary and secondary nodes resides on a Power5 host. Both are physical servers. The rootvg is on internal disks and the data vg's are on SAN Attached storage. Both primary and secondary nodes are on AIX 7.1 TL3 SP4. For HACMP we have a Active-Passive configuration.
NEW ENVIRONMENT:
Everything is virtualized. We have a Dual VIO setup on the Power8s. The boot disk are coming through a Storage cluster on VIO (vSCSI) and Data disks from SAN (NPIV).
As part of the new environment we are also moving on to the new network i.e. different IP subnet. (old=172.XXX) (new=10.XXX)
The way we have been migrating our previous (non-HA/test/dev) servers is that we clone the mksysb on to the vscsi disk on the new lpar before the day of the cutover and configure the new network on the server. On the day of cutover we bring down apps/DB on the old server (p5) then umount FS, varyoff and export VGs and remove the SAN disks. The storage team unmaps the LUNs and maps them back on the NEW WWPNs on the Power8 (NPIV).
On the new server we configure and import the disks and VGs and mount all FS inclulding NFS. Make DNS changes with the new IP and bring down all apps and DBs.
Now once we bring HACMP into the picture things become a little more complicated, can some of the experts here give me sound advice on how can we make the process as smooth as possible as we are moving on to the new server hardware as well as new network.
Thanks in Advance!
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LEARN ABOUT OPENSOLARIS
scconf_quorum_dev_quorum_server
scconf_quorum_dev_quorum_server(1M) System Administration Commands scconf_quorum_dev_quorum_server(1M)
NAME
scconf_quorum_dev_quorum_server - add, remove, and configure a quorum server type of quorum device.
SYNOPSIS
scconf [-q quorum-options]
DESCRIPTION
Note -
Beginning with the Sun Cluster 3.2 release, Sun Cluster software includes an object-oriented command set. Although Sun Cluster software
still supports the original command set, Sun Cluster procedural documentation uses only the object-oriented command set. For more infor-
mation about the object-oriented command set, see the Intro(1CL) man page.
Sun Cluster provides the option of configuring a quorum server as a quorum device. This configuration information consists of a device name
that must be unique across quorum devices, the address of the host machine on which the quorum server is running, and the port number on
which the quorum server is listening for requests. If your cluster requires multiple quorum devices, configure multiple quorum servers or
use storage devices for the additional quorum devices. A quorum server can act as only one quorum device for a cluster.
To configure the cluster to use a quorum server, the quorum server software must be installed, configured, and running on a machine that is
accessible to all cluster nodes. The quorum server itself must be configured and running when this command is run on a cluster node. See
clquorumserver(1M) for information about configuring the quorum server.
OPTIONS
The following parameters are required for configuring a quorum server type of quorum device. See scconf(1M) for the list of supported
generic options.
Use the add and remove forms of the command to add shared quorum devices to and remove shared quorum devices from the configuration file.
Use the change form of the command to change various cluster quorum configuration properties or states. The following quorum server spe-
cific options can be used to change the cluster quorum configuration:
Add a Quorum Server Type of Quorum Device
Before adding a quorum device:
o The quorum server must be running on the quorum server host machine.
o You must enter the quorum server host name in the /etc/inet/hosts file.
o You must set the netmask for the quorum server host.
For information about the hosts file and netmask requirements, see the procedure on adding quorum server quorum devices in the Sun Cluster
System Administration Guide. Once the quorum device is added, none of the parameters can be changed.
# scconf -q -a name=devicename,type=quorum_server,qshost=qhost,port=portnumber
name=devicename
The name of a quorum server. This name must be unique among all quorum devices in the system.
type=quorum_server
Indicates the type of disk device group to create. For a quorum server type of quorum device, the value of this parameter must be quo-
rum_server.
qhost=qhost
The hostname of the machine on the network that can be reached by all cluster nodes and that is running the quorum server. Depending on
the IPv4 or IPv6 configuration of the host, this hostname must have an entry in the /etc/hosts file, the /etc/inet/ipnodes file, or
both.
port=portnumber
The port on which the quorum server listens for requests.
Note -
If you need to change the port number of a quorum server while maintaining the same host name, remove the quorum device first, make
your changes, then add the quorum device back.
Change the Configuration Parameters of a Quorum Server Type Quorum Device
# scconf -c -q name=devicename,maintstate | reset
If other parameters such as qshost or port must be changed, add a new quorum device with the new parameters and remove the existing quorum
device.
Remove a Quorum Server Type of Quorum Device
# scconf -q name=devicename
When the scconf command is interrupted or fails while performing quorum-related operations, quorum configuration information can
become inconsistent in the cluster configuration database. If this occurs, either run the same scconf command again or run the scconf
command with the reset option to reset the quorum information.
EXAMPLES
Example 1 Adding a Quorum Server Type of Quorum Device
The following scconf command adds a quorum server quorum device with its port number configured as 9000.
# scconf -q -a name=qd1,type=quorum_server,qshost=scclient1,port=9000
Example 2 Removing a Quorum Server Type of Quorum Device
The following scconf command removes the quorum server quorum device named qd1.
# scconf -r -q name=qd1
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWsczu |
+-----------------------------+-----------------------------+
|Stability |Evolving |
+-----------------------------+-----------------------------+
SEE ALSO
Intro(1CL), clquorum(1CL), clquorumserver(1CL), cluster(1CL), scconf(1M), gateways(4), hosts(4)
Sun Cluster 3.2 18 Jul 2006 scconf_quorum_dev_quorum_server(1M)