RSINFOMINDS: 03/01/2014

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Monday, 17 March 2014

VCS: Cluster Filesystem Extension

[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 ~]#

1) First we need to find if the /oracle is a clustered filesystem or not.

[root@node1 ~]# hares -display oracle_mnt -attribute MountPoint
#Resource Attribute System Value
oracle_mnt MountPoint global /oracle

[root@node1 ~]# hares -display -attribute MountPoint
#Resource Attribute System Value
oracle_mnt MountPoint global /oracle
[root@node1 ~]#

So, /oracle belongs to the resource oracle_mnt.

2) Next we need to find the volume of the file system "/oracle", can also get it from df command.

[root@node1 ~]# hares -display oracle_mnt -attribute BlockDevice MountPoint
#Resource Attribute System Value
oracle_mnt BlockDevice global /dev/vx/dsk/oracle/oracle_vol
oracle_mnt MountPoint global /oracle
[root@node1 ~]#

3) Increased the volume by 100M.

[root@node1 ~]# vxassist -g oracle growby oracle_vol 100M

[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 1228800 - ACTIVE - -
pl oracle_vol-01 oracle_vol ENABLED 1228800 - ACTIVE - -
sd disk_8-01 oracle_vol-01 ENABLED 1228800 0 - - -
[root@node1 ~]#

The size of the volume is 1228800.

[root@node1 ~]# /opt/VRTS/bin/fsadm -t vxfs -b 1228800 /oracle
UX:vxfs fsadm: INFO: V-3-25942: /dev/vx/rdsk/oracle/oracle_vol size increased from 1024000 sectors to 1228800 sectors
[root@node1 ~]# df -Th /oracle
Filesystem Type Size Used Avail Use% Mounted on
/dev/vx/dsk/oracle/oracle_vol
vxfs 600M 3.3M 560M 1% /oracle
[root@node1 ~]#

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 /]#

Thursday, 6 March 2014

/usr/sbin/alt_rootvg_op[1246]: v1 > v2 : 0403-009 The specified number is not valid for this command = PART 2

With the debug mode, I could see the issue with the blv set on the disk:

# /usr/lpp/bosinst/blvset -d /dev/hdisk1 -g level
5.3

# /usr/lpp/bosinst/blvset -d /dev/hdisk0 -g level

BLV for hdisk1 is 5.3 but for hdisk0 is empty.

Thats the reason for the failure.

(( v1 > v2 ))

/usr/sbin/alt_rootvg_op[1246]: v1 > v2 : 0403-009 The specified number is not valid for this command.

Hence I change the BLV using the same command to fix the issue.

# /usr/lpp/bosinst/blvset -d /dev/hdisk0 -p levlel
5.3

# /usr/lpp/bosinst/blvset -d /dev/hdisk0 -g level
5.3

# alt- _rootg vg_op -W- -d hdisk0
Waking up altinst_rootvg volume group ...
#

# df
Filesystem 512-blocks Free %Used Iused %Iused Mounted on
/dev/hd4 2162688 1998512 8% 1682 1% /
/dev/hd2 19070976 8906760 54% 25659 2% /usr
/dev/hd9var 2162688 2071424 5% 406 1% /var
/dev/hd3 2097152 2026448 4% 104 1% /tmp
/dev/hd1 1114112 1078472 4% 57 1% /home
/proc - - - - - /proc
/dev/hd10opt 1179648 1067728 10% 713 1% /opt
/dev/alt_hd4 2162688 1998520 8% 1664 1% /alt_inst
/dev/alt_hd1 1114112 1078472 4% 57 1% /alt_inst/home
/dev/alt_hd10opt 1179648 1067728 10% 713 1% /alt_inst/opt
/dev/alt_hd3 2097152 2026360 4% 98 1% /alt_inst/tmp
/dev/alt_hd2 19070976 8906760 54% 25659 2% /alt_inst/usr
/dev/alt_hd9var 2162688 2071568 5% 406 1% /alt_inst/var
#

/usr/sbin/alt_rootvg_op[1246]: v1 > v2 : 0403-009 The specified number is not valid for this command = PART 1

# at lt_rootg vg_op -W -d hdisk0

Waking up altinst_rootvg volume group ...

/usr/sbin/alt_rootvg_op[1246]: v1 > v2 : 0403-009 The specified number is not valid for this command.

# lspv

hdisk0 00046474e2326aa4 altinst_rootvg

hdisk1 000b026db61a3de7 rootvg active

The cloning has completed fine:

Changing logical volume names in volume group descriptor area.

Fixing LV control blocks...

Fixing file system superblocks...

Bootlist is set to the boot disk: hdisk0

But still not able to wake up the altinst_rootvg.

Wake the alt inst in debug mode:

# alt_rootvg_op -W -d hdisk0 -D

+ typeset +f

+ typeset -ft FAIL

+ typeset -ft abspath

+ typeset -ft adjust_idata_fs_size

BOOT_DISK=hdisk1

+ + /usr/lpp/bosinst/blvset -d /dev/hdisk1 -g level

BOOT_OS=5.3

+ + /usr/lpp/bosinst/blvset -d /dev/hdisk0 -g level

ALT_BOOT_OS=

+ is_level_greater 5.3

+ [[ 5.3 = ]]

+ echo 5.3

+ read v1 r1 leftover1

+ /usr/bin/tr .

+ echo

+ read v2 r2 leftover2

+ /usr/bin/tr .

+ (( v1 > v2 ))

/usr/sbin/alt_rootvg_op[1246]: v1 > v2 : 0403-009 The specified number is not valid for this command.

CONTINUED.............

How To Do OS Cloning on AIX In Debug Mode

The hardware cloning in AIX is done using # alt_disk_copy or # alt_disk_install command.

You can use the flag : -D to enable the debug mode.

Sunday, 2 March 2014

Linux: Command Belongs To Which RPM

If you want to install a Command and not sure which package it belongs to. Here are the steps:

[root@vm1 /]# nslookup vm1
-bash: nslookup: command not found

I am trying to use "nslookup" but it does not exist on the server.

But I have CD mounted with repository configured.

Now find out which RPM has the command.

root@vm1 /]# yum whatprMatched from:

Filename : /usr/share/zsh/4.3.10/functions/nslookup

32:bind-utils-9.8.2-0.7.rc1.el6.x86_64 : Utilities for querying DNS name servers

Repo : cluster

Matched from:

Filename : /usr/bin/nslookup

32:bind-utils-9.8.2-0.7.rc1.el6.x86_64 : Utilities for querying DNS name servers

Repo : server

Matched from:

Filename : /usr/bin/nslookup

zsh-4.3.10-5.el6.x86_64 : A powerful interactive shell

Repo : server

Matched from:

Filename : /usr/share/zsh/4.3.10/functions/nslookup

So, You can install any of the above RPM to get the Command. :)

Linux: Show the number of CPU cores and sockets on your system

dmidecode -t 4 |grep Thread # number or cpu listed as well by cat /proc/cpuinfo

dmidecode -t 4 |grep CPU # number of physical CPU

Appending groups to a user

For example, if testuser is a member of group1 and group2, and you need to add the user to group3, the command would be:

usermod -G group1,group2,group3 testuser

If you mistakenly ran:

usermod -G group3 testuser

Then testuser would be removed from group1 and group2 and only be a member of group3.