RSINFOMINDS: 16 Mar 2014

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Sunday 16 March 2014

Adding a Resource to an existing Cluster

Now I am going to add a script as a resource to an existing cluster.

Sample Script:

[root@node1 oracle]# cat script.shout
Sat Mar 15 10:01:17 EDT 2014 on node1.cluster.com
[root@node1 oracle]# cat script.sh
#!/bin/ksh

while true
do
echo "`date` on `hostname`" >> ${0}out
sleep 4
done
[root@node1 oracle]#

Creating a Process Resource:

[root@node1 oracle]# hares -add oracle_process Process oracle_sg

VCS NOTICE V-16-1-10242 Resource added. Enabled attribute must be set before agent monitors

[root@node1 ~]# hares -modify oracle_process Critical 1

[root@node1 ~]# hares -modify oracle_process UserName root

[root@node1 ~]# hares -modify oracle_process PathName /oracle/script.sh

[root@node1 ~]# hares -modify oracle_process Enabled 1

[root@node1 ~]# hares -link oracle_process oracle_ip

VCS Configruation: Part VI

Doing a Cluster Test:

[root@node1 /]# hastatus -sum

-- SYSTEM STATE

-- System State Frozen

A node1 RUNNING 0

A node2 RUNNING 0

-- GROUP STATE

-- Group System Probed AutoDisabled State

B oracle_sg node1 Y N ONLINE

B oracle_sg node2 Y N OFFLINE

[root@node1 /]# df -Th /oracle

Filesystem Type Size Used Avail Use% Mounted on

/dev/vx/dsk/oracle/oracle_vol

vxfs 500M 3.3M 466M 1% /oracle

[root@node1 /]# hagrp -switch oracle_sg -to node2

[root@node1 /]# hastatus -sum

-- SYSTEM STATE

-- System State Frozen

A node1 RUNNING 0

A node2 RUNNING 0

-- GROUP STATE

-- Group System Probed AutoDisabled State

B oracle_sg node1 Y N OFFLINE

B oracle_sg node2 Y N ONLINE

[root@node1 /]#

Thats it.

VCS Configruation: Part V

Once everything is done. On the Java Console You would see the message:

Now the last step is create a link between the resource.

Disk Group is the parent of the volume.

Volume is the parent of the mount.

[root@node1 /]# hares -link oracle_vol oracle_dg
[root@node1 /]# hares -link oracle_mnt oracle_vol

VCS Configruation: Part IV

Creating a Resources:

Disk Group:

[root@node1 /]# hares -add oracle_dg DiskGroup oracle_sg

[root@node1 /]# hares -modify oracle_dg DiskGroup oracle
[root@node1 /]# hares -modify oracle_dg Enabled 1
[root@node1 /]# hares -online oracle_dg -sys node1
[root@node1 /]# hares -state
#Resource Attribute System Value
oracle_dg State node1 ONLINE
oracle_dg State node2 OFFLINE
[root@node1 /]#

Volume Resource:

[root@node1 /]# hares -modify oracle_vol DiskGroup oracle

[root@node1 /]# hares -modify oracle_vol Volume oracle_vol

[root@node1 /]# hares -modify oracle_vol Enabled 1

[root@node1 /]# hares -online oracle_vol -sys node1

[root@node1 /]# hares -state oracle_vol

#Resource Attribute System Value

oracle_vol State node1 ONLINE

oracle_vol State node2 OFFLINE

[root@node1 /]#

Mount Point:

[root@node1 /]# hares -add oracle_mnt Mount oracle_sg

[root@node1 /]# hares -modify oracle_mnt Enabled 1

[root@node1 /]# hares -modify oracle_mnt FsckOpt %-y

[root@node1 /]# hares -modify oracle_mnt BlockDevice /dev/vx/dsk/oracle/oracle_vol

[root@node1 /]# hares -modify oracle_mnt FSType vxfs

[root@node1 /]# hares -modify oracle_mnt MountPoint /oracle

[root@node1 /]# hares -modify oracle_mnt Critical 1

[root@node1 /]# hares -online oracle_mnt -sys node1

[root@node1 /]# hares -state oracle_mnt

#Resource Attribute System Value

oracle_mnt State node1 ONLINE

oracle_mnt State node2 OFFLINE

[root@node1 /]#

VCS Configruation: Part III

Creating the cluster resource.

Since we are going to create a HA LVM:

Disk Group: oracle

Volume: oracle_vol

Mount Point: /oracle

1) We are going to create a Service Group: oracle_sg

[root@node1 /]# hagrp -add oracle_sg
VCS NOTICE V-16-1-10136 Group added; populating SystemList and setting the Parallel attribute recommended before adding resources
[root@node1 /]# hagrp -modify oracle_sg SystemList node1 0 node2 1
[root@node1 /]# hagrp -list
oracle_sg node1
oracle_sg node2
[root@node1 /]#

[root@node1 /]# hagrp -list
oracle_sg node1
oracle_sg node2
[root@node1 /]#

[root@node1 /]# hagrp -state
#Group Attribute System Value
oracle_sg State node1 |OFFLINE|
oracle_sg State node2 |OFFLINE|
[root@node1 /]#

VCS Configruation: Part II

Export and Import the disk group on the alternate node:

[root@node1 /]# umount /oracle

[root@node1 /]# vxdg list

NAME STATE ID

oracle enabled,cds 1394886552.14.node1.cluster.com

[root@node1 /]# vxdg deport oracle

[root@node1 /]# vxdg list

NAME STATE ID

[root@node1 /]#

[root@node2 ~]# vxdg -t import oracle

[root@node2 ~]# vxdg list

NAME STATE ID

oracle enabled,cds 1394886552.14.node1.cluster.com

[root@node2 ~]# vxprint -g oracle

TY NAME ASSOC KSTATE LENGTH PLOFFS STATE TUTIL0 PUTIL0

dg oracle oracle - - - - - -

dm disk_8 disk_8 - 2027264 - - - -

v oracle_vol fsgen ENABLED 1024000 - ACTIVE - -

pl oracle_vol-01 oracle_vol ENABLED 1024000 - ACTIVE - -

sd disk_8-01 oracle_vol-01 ENABLED 1024000 0 - - -

[root@node2 ~]#

Mounting on alternate node:

[root@node2 ~]# mount -t vxfs /dev/vx/dsk/oracle/oracle_vol /oracle

[root@node2 ~]# df -Th /oracle

Filesystem Type Size Used Avail Use% Mounted on

/dev/vx/dsk/oracle/oracle_vol

vxfs 500M 3.3M 466M 1% /oracle

[root@node2 ~]#

VCS Configruation: Part I

The below post will show how to create a Cluster HA filesystem resource:

[root@node1 /]# vxdisk -e list
DEVICE TYPE DISK GROUP STATUS OS_NATIVE_NAME ATTR
disk_8 auto:cdsdisk - - online sdc -
sda auto:none - - online invalid sda -
sdb auto:LVM - - LVM sdb -
[root@node1 /]#

[root@node2 ~]# vxdisk -e list

DEVICE TYPE DISK GROUP STATUS OS_NATIVE_NAME ATTR

disk_8 auto:cdsdisk - - online sdb -

sda auto:none - - online invalid sda -

[root@node2 ~]#

Creating a disk group:

[root@node1 /]# vxdg init oracle disk_8

[root@node1 /]# vxdg list

NAME STATE ID

oracle enabled,cds 1394886552.14.node1.cluster.com

[root@node1 /]#

Creating a volume:

[root@node1 /]# vxassist -g oracle make oracle_vol 500M

[root@node1 /]# vxprint -g oracle

TY NAME ASSOC KSTATE LENGTH PLOFFS STATE TUTIL0 PUTIL0

dg oracle oracle - - - - - -

dm disk_8 disk_8 - 2027264 - - - -

v oracle_vol fsgen ENABLED 1024000 - ACTIVE - -

pl oracle_vol-01 oracle_vol ENABLED 1024000 - ACTIVE - -

sd disk_8-01 oracle_vol-01 ENABLED 1024000 0 - - -

[root@node1 /]#

Formating and Mount the filesystem:

[root@node1 /]# mount -t vxfs /dev/vx/dsk/oracle/oracle_vol /oracle

[root@node1 /]# df -Th /oracle

Filesystem Type Size Used Avail Use% Mounted on

/dev/vx/dsk/oracle/oracle_vol

vxfs 500M 3.3M 466M 1% /oracle

[root@node1 /]#