Dwai Lahiri's Sun Cluster Cheat Sheet - 4

Index

This page contains the following information:

Contents
Index
Data Services in the Cluster
Fault monitor operations
Using scrgadm to register and configure Data service software
Command Quick Reference
Sun Terminal Concentrator (Annex NTS)

Data Services in the Cluster

HAStoragePlus helps configure a local filesystem into a highly available one. It provides following capabilities:

additional filesystem checks
mounts and unmounts
enables Sun cluster to failover local file systems (to failover, local file system must reside on global device groups with affinity switchovers enabled)

Data Service Agent — is a specially written software that allows a data service in a cluster to operate properly.

Data Service Agent (or Agent) does the following to a standard application:

stops/starts an application
monitors faults
validates configuration
provides a registration information file that allows Sun Cluster to store all the info about the methods

Sun Cluster 2.x runs Fault Monitoring components on failover node, and can initiate a takeover. On Cluster 3.x software, it is not allowed. Monitor can either monitor to restart or failover on primary (active host) node.

Failover resource groups:

Logical host resource — SUNW.Logicalhostname Data Storage Resource — SUNW.HAStoragePlus NFS resource — SUNW.nfs

Shutdown a resource group

scswitch -F -g

Turn on a resource group

scswitch -Z -g

Switch a failover group over to another node

scswitch -z -g -h

Restart a resource group

scswitch -R -h -g

Evacuate all resources and rgs from a node

scswitch -S -h node

Disable a res and its fault monitor

scswitch -n -j

Enable a resource and it's fault monitor

scswitch -e -j

Clear the `STOP_FAILED` flag

scswitch -c -j -h -f STOP_FAILED

How to add a diskgroup and volume to Cluster configuration

Create the disk group and volume.
Register the local disk group with the cluster.

root@aesnsra1:../ # scconf -a -D type=vxvm,name=patroldg2,nodelist=aesnsra2
root@aesnsra2:../ # scswitch -z -h aesnsra2 -D patroldg2
Create your file system.
Update /etc/vfstab to change '-' boot options

Example:

/dev/vx/dsk/patroldg2/patroldg02 /dev/vx/rdsk/patroldg2/patroldg02 /patrol02 vxfs 3 no suid
Set up a resource group with a HAStoragePlus resource for local filesystem:

root@aesnsra2:../ # scrgadm -a -g aescib1-hastp-rg -h aescib1
root@aesnsra2:../ # scrgadm -a -g aescib1-hastp-rg -j sapmntdg01-rs \
-t SUNW.HAStoragePlus -x FilesystemMountPoints=/sapmnt
Bring the resource group online which will mount the specified filesystem:

root@aesnsra2:../ # scswitch -Z -g hastp-aesnsra2-rg
Enable resource.

root@aesnsra2:../# scswitch -e -j osdumps-dev-rs
(Optional) Reboot and test.

Fault monitor operations

Disable the fault monitor for a resource

scswitch -n -M -j

Enable the fault monitor for a resource

scswitch -e -M -j

scstat -g #shows status of all resource groups

Using `scrgadm` to register and configure Data service software

scrgadm -a -t SUNW.nfs

scrgadm -a -t SUNW.HAStoragePlus
scrgadm -p

Create a failover resource

scrgadm -a -f nfs-rg -h node1,node2 \
-y Pathprefix=/global/nfs/admin

Add logical host name resource to resource group

scrgadm -a -L -g nfs-rg -l clustername-nfs

Create a `HAStoragePlus` resource

scrgadm -a -j nfs-stor -g nfs-rg \
*-t SUNW.HAStoragePlus*
-x FilesystemMountpoints=/global/nfs -x AffinityOn=True

Create `SUNW.nfs` resource

scrgadm -a -j nfs-res -g nfs-rg \
-t SUNW.nfs -y Resource_dependencies=nfs-stor

Print the various resource/resource group dependencies via `scrgadm`

scrgadm -pvv|grep -i depend #And then parse this output

Enable resource and resource monitors, manage resource group and switch resource group to online state

scswitch -Z -f nfs-rg

scstat -g

Show current resource group configuration

scrgadm -p[v[v]] [ -t resource_type_name ] [ -g resgrpname ] \
[ -j resname ]

Resizing a VxVM/VxFS vol/fs under Sun Cluster

# vxassist -g aesnfsp growby saptrans 5g

# scconf -c -D name=aesnfsp,sync

root@aesrva1:../ # vxprint -g aesnfsp -v saptrans
TY NAME ASSOC KSTATE LENGTH PLOFFS STATE TUTIL0 PUTIL0
v saptrans fsgen ENABLED 188743680 - ACTIVE - -

root@aesrva1:../ # fsadm -F vxfs -b 188743680 /saptrans
UX:vxfs fsadm: INFO: /dev/vx/rdsk/aesnfsp/saptrans is currently 178257920 sector
s - size will be increased

# root@aesrva1:../ # scconf -c -D name=aesnfsp,sync

Command Quick Reference

scstat

scconf

scrgadm

scha_

scdidadm

Sun Terminal Concentrator (Annex NTS)

Enable setup mode by pressing TC test button until TC power indicator starts to blink rapidly, then release the button and press it briefly.

On entering the Setup mode, a monitor: prompt is displayed.

Set up IP address using:

monitor::addr

Setting up Load source:

monitor::seq

Specifying image:

monitor::image

Telnet into the TC IP address:

Enter cli

Elevate to privileged acct using su

Run admin at the TC OS prompt:

get admin: subprompt:

show port=1 type mode
set port= type mode #Choose various options
quit (to exit the boot prompt)
boot