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Working with CLUVFY utility

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The Cluster Verification Utility (CVU) performs system checks in preparation for installation, patch updates, or other system changes. Using CVU ensures that you have completed the required system configuration and preinstallation steps so that your Oracle Grid Infrastructure or Oracle Real Application Clusters (Oracle RAC) installation, update, or patch operation completes successfully.


Overview

In this practice, you will work with CLUVFY to verify the state of various cluster components.

1.       Determine the location of the cluvfy utility and its configuration file.

[[email protected]]# su - grid

[[email protected]]$ . oraenv

ORACLE_SID = [grid] ? +ASM1

The Oracle base has been set to /u01/app/grid

 

[[email protected]]$ which cluvfy (To let you know the location of utility)

cluvfy

[[email protected]]$ cd $ORACLE_HOME/cv/admin

[[email protected] admin]$ cat cvu_config

# Configuration file for Cluster Verification Utility(CVU)

# Version: 011405

#

# NOTE:

# 1._ Any line without a '=' will be ignored

# 2._ Since the fallback option will look into the environment variables,

# please have a component prefix(CV_) for each property to define a

# namespace.

#

#Nodes for the cluster. If CRS home is not installed, this list will be

#picked up when -n all is mentioned in the commandline argument.

#CV_NODE_ALL=

#if enabled, cvuqdisk rpm is required on all nodes

CV_RAW_CHECK_ENABLED=TRUE

# Fallback to this distribution id

#CV_ASSUME_DISTID=OEL5

#Complete file system path of sudo binary file, default is /usr/local/bin/sudo

V_SUDO_BINARY_LOCATION=/usr/local/bin/sudo

#Complete file system path of pbrun binary file, default is /usr/local/bin/pbrun

CV_PBRUN_BINARY_LOCATION=/usr/local/bin/pbrun

# Whether X-Windows check should be performed for user equivalence with SSH

#CV_XCHK_FOR_SSH_ENABLED=TRUE

# To override SSH location

#ORACLE_SRVM_REMOTESHELL=/usr/bin/ssh

# To override SCP location

#ORACLE_SRVM_REMOTECOPY=/usr/bin/scp

# To override version used by command line parser

CV_ASSUME_CL_VERSION=12.1

# Location of the browser to be used to display HTML report

#CV_DEFAULT_BROWSER_LOCATION=/usr/bin/Mozilla

2.       Display the stage options and stage names that can be used with the cluvfy utility.

[[email protected] admin]$ cluvfy stage -list

USAGE:

cluvfy stage {-pre|-post} <stage-name> <stage-specific options> [-verbose]

 

Valid Stages are:

-pre cfs : pre-check for CFS setup

-pre crsinst : pre-check for CRS installation

-pre acfscfg : pre-check for ACFS Configuration.

-pre dbinst : pre-check for database installation

-pre dbcfg : pre-check for database configuration

-pre hacfg : pre-check for HA configuration

-pre nodeadd : pre-check for node addition.

-post hwos : post-check for hardware and operating system

-post cfs : post-check for CFS setup

-post crsinst : post-check for CRS installation

-post acfscfg : post-check for ACFS Configuration.

-post hacfg : post-check for HA configuration

-post nodeadd : post-check for node addition.

-post nodedel : post-check for node deletion.

3.       Perform a postcheck for the ACFS configuration on all nodes

[[email protected] admin]$ cluvfy stage -post acfscfg -n all

Performing post-checks for ACFS Configuration

Checking node reachability...

Node reachability check passed from node "node1"

Checking user equivalence...

User equivalence check passed for user "grid"

Task ASM Integrity check started...

Starting check to see if ASM is running on all cluster nodes...

ASM Running check passed. ASM is running on all specified nodes

Disk Group Check passed. At least one Disk Group configured

 

Task ASM Integrity check passed...

 

Task ACFS Integrity check started...

 

Task ACFS Integrity check passed

 

UDev attributes check for ACFS started...

UDev attributes check passed for ACFS

Post-check for ACFS Configuration was successful.

4.       Display a list of the component names that can be checked with the cluvfy utility

[[email protected] admin]$ cluvfy comp -list

USAGE:

cluvfy comp <component-name> <component-specific options> [-verbose]

 

Valid Components are:

nodereach : checks reachability between nodes

nodecon : checks node connectivity

cfs : checks CFS integrity

ssa : checks shared storage accessibility

space : checks space availability

sys : checks minimum system requirements

clu : checks cluster integrity

clumgr : checks cluster manager integrity

ocr : checks OCR integrity

olr : checks OLR integrity

ha : checks HA integrity

freespace : checks free space in CRS Home

crs : checks CRS integrity

nodeapp : checks node applications existence

admprv : checks administrative privileges

peer : compares properties with peers

software : checks software distribution

acfs : checks ACFS integrity

asm : checks ASM integrity

gpnp : checks GPnP integrity

gns : checks GNS integrity

scan : checks SCAN configuration

ohasd : checks OHASD integrity

clocksync : checks Clock Synchronization

vdisk : checks Voting Disk configuration and UDEV settings

healthcheck : checks mandatory requirements and/or best practice recommendations

dhcp : checks DHCP configuration

dns : checks DNS configuration

baseline : collect and compare baselines

5.       Display the syntax usage help for the space component check of the cluvfy utility

[[email protected] admin]$ cluvfy comp space -help

USAGE

cluvfy comp space [-n <node_list>] -l <storage_location> -z <disk_space>{B|K|M|G } [-verbose]

 

<node_list> is the comma-separated list of non-domain qualified node names on which the test should be conducted. If "all" is specified, then all the nodes in the cluster will be used for verification.

<storage_location> is the storage path.

<disk_space> is the required disk space, in units of bytes(B),kilobytes(K),megabytes(M) or gigabytes(G).

 

DESCRIPTION:

Checks for free disk space at the location provided by '-l' option on all the nodes in the nodelist. If no '-n' option is given, local node is used for this check.

6.       Verify that on each node of the cluster the /tmp directory has at least 200 MB of free space in it using the cluvfy utility. Use verbose output.

[[email protected] admin]$ cluvfy comp space -n node1,node2 -l /tmp -z 200M -verbose

 

Verifying space availability

 

Checking space availability...

 

Check: Space available on "/tmp"

Node Name Available Required Status

------------ ------------------------ ------------------------ ----------

node2 15.8294GB (1.6598324E7KB) 200MB (204800.0KB) passed

node1 15.6033GB (1.6361288E7KB) 200MB (204800.0KB) passed

Result: Space availability check passed for "/tmp"

 

Verification of space availability was successful.

 


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