How to install ASMLib on CentOS 7.2

ASM

The purpose of this blog post is to show that you can install ASMLib on CentOS 7.2 although CentOS 7 is not supported by Oracle Corp.

Disclaimer: This configuration is not supported by Oracle Corp. Use it at your own risks.

For this installation I have used following documents:

Red Hat Oracle ASMLib Availability and Support
OTN Oracle ASMLib Downloads for Red Hat Enterprise Linux 7.
Short version

You only need to run following commands on your Centos 7.2 machine (assuming your machine is connected to Internet and its yum configuration is OK):

yum -y install kmod-oracleasm

wget http://download.oracle.com/otn_software/asmlib/oracleasmlib-2.0.12-1.el7.x86_64.rpm

yum -y localinstall oracleasmlib-2.0.12-1.el7.x86_64.rpm

wget http://yum.oracle.com/repo/OracleLinux/OL7/latest/x86_64/getPackage/oracleasm-support-2.1.8-3.el7.x86_64.rpm

yum -y localinstall oracleasm-support-2.1.8-3.el7.x86_64.rpm

Long version

Linux VirtualBox (VBOX) configuration
I have first created 2 virtual disks (first disk as system disk and second disk as ASM disk):

vboxmanage createhd –filename co7tosa0.sata.0.vdi –size=40960 -format=VDI –variant fixe
vboxmanage createhd –filename co7tosa0.sata.1.vdi –size=12040 -format=VDI –variant fixe
I have created a 5.0.4 VBOX virtual machine with following commands:

vboxmanage createvm –name co7tosa0 –basefolder “M:\VirtualBox VMs” –register
vboxmanage modifyvm co7tosa0 –ostype Linux –memory 2048 –nic1 nat –nic2 hostonly
vboxmanage modifyvm co7tosa0 –nictype1 82540EM
vboxmanage modifyvm co7tosa0 –nictype2 82540EM
vboxmanage modifyvm co7tosa0 –hostonlyadapter2 “VirtualBox Host-Only Ethernet Adapter”
vboxmanage modifyvm co7tosa0 –ostype “RedHat_64”
vboxmanage storagectl co7tosa0 –add ide –name IDE –controller PIIX4
vboxmanage modifyvm co7tosa0 –vram 12
vboxmanage storagectl co7tosa0 –add sata –name SATA –portcount 4
vboxmanage storageattach co7tosa0 –storagectl SATA –port 0 –type hdd –medium co7tosa0.sata.0.vdi
vboxmanage storageattach co7tosa0 –storagectl SATA –port 1 –type hdd –medium co7tosa0.sata.1.vdi
vboxmanage storageattach co7tosa0 –storagectl IDE –device 0 –port 0 –type dvddrive –medium j:\free_media\CentOS-7-x86_64-Minimal.iso
I have installed CentOS 7.2 the same way like in my previous blog post.

ASMLib packages installation
I have checked operating system version:

cat /etc/redhat-release

CentOS Linux release 7.2.1511 (Core)

cat /etc/centos-release

CentOS Linux release 7.2.1511 (Core)
I have installed wget:

yum -y install wget

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile

  • base: mirrors.ircam.fr
  • extras: centos.mirror.fr.planethoster.net
  • updates: fr2.rpmfind.net
    Resolving Dependencies
    –> Running transaction check
    —> Package wget.x86_64 0:1.14-10.el7_0.1 will be installed
    –> Finished Dependency Resolution

Dependencies Resolved

======================================================================================================

Package Arch Version Repository Size

Installing:
wget x86_64 1.14-10.el7_0.1 base 545 k

Transaction Summary

Install 1 Package

Total download size: 545 k
Installed size: 2.0 M
Downloading packages:
wget-1.14-10.el7_0.1.x86_64.rp FAILED
http://mirror.ate.info/ftp.centos.org/7.2.1511/os/x86_64/Packages/wget-1.14-10.el7_0.1.x86_64.rpm: [Errno 12] Timeout on http://mirror.ate.info/ftp.centos.org/7.2.1511/os/x86_64/Packages/wget-1.14-10.el7_0.1.x86_64.rpm: (28, ‘Connection timed out after 30001 milliseconds’)
Trying other mirror.
warning: /var/cache/yum/x86_64/7/base/packages/wget-1.14-10.el7_0.1.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Public key for wget-1.14-10.el7_0.1.x86_64.rpm is not installed
wget-1.14-10.el7_0.1.x86_64.rpm | 545 kB 00:00:00
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Importing GPG key 0xF4A80EB5:
Userid : “CentOS-7 Key (CentOS 7 Official Signing Key) “
Fingerprint: 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5
Package : centos-release-7-2.1511.el7.centos.2.10.x86_64 (@anaconda)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : wget-1.14-10.el7_0.1.x86_64 1/1
Verifying : wget-1.14-10.el7_0.1.x86_64 1/1

Installed:
wget.x86_64 0:1.14-10.el7_0.1

Complete!
kmod-oracleasm is in the Centos yum repository: I have installed it with yum:

yum -y install kmod-oracleasm

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile

  • base: mirrors.ircam.fr
  • extras: centos.mirror.fr.planethoster.net
  • updates: fr2.rpmfind.net
    Resolving Dependencies
    –> Running transaction check
    —> Package kmod-oracleasm.x86_64 0:2.0.8-15.el7.centos will be installed
    –> Finished Dependency Resolution

Dependencies Resolved

======================================================================================================

Package Arch Version Repository Size

Installing:
kmod-oracleasm x86_64 2.0.8-15.el7.centos base 35 k

Transaction Summary

Install 1 Package

Total download size: 35 k
Installed size: 123 k
Downloading packages:
kmod-oracleasm-2.0.8-15.el7.centos.x86_64.rpm | 35 kB 00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : kmod-oracleasm-2.0.8-15.el7.centos.x86_64 1/1
Verifying : kmod-oracleasm-2.0.8-15.el7.centos.x86_64 1/1

Installed:
kmod-oracleasm.x86_64 0:2.0.8-15.el7.centos

Complete!
I have downloaded oracleasmlib from OTN:

wget http://download.oracle.com/otn_software/asmlib/oracleasmlib-2.0.12-1.el7.x86_64.rpm

–2016-01-12 20:01:28– http://download.oracle.com/otn_software/asmlib/oracleasmlib-2.0.12-1.el7.x86_64.rpm
Resolving download.oracle.com (download.oracle.com)… 23.10.251.16, 23.10.251.67
Connecting to download.oracle.com (download.oracle.com)|23.10.251.16|:80… connected.
HTTP request sent, awaiting response… 200 OK
Length: 19360 (19K) [application/x-redhat-package-manager]
Saving to: ‚oracleasmlib-2.0.12-1.el7.x86_64.rpm‚

100%[==================================================================>] 19,360 –.-K/s in 0.02s

2016-01-12 20:01:28 (1.14 MB/s) – ‚oracleasmlib-2.0.12-1.el7.x86_64.rpm‚ saved [19360/19360]
I have installed it with yum:

yum -y localinstall oracleasmlib-2.0.12-1.el7.x86_64.rpm

Loaded plugins: fastestmirror
Examining oracleasmlib-2.0.12-1.el7.x86_64.rpm: oracleasmlib-2.0.12-1.el7.x86_64
Marking oracleasmlib-2.0.12-1.el7.x86_64.rpm to be installed
Resolving Dependencies
–> Running transaction check
—> Package oracleasmlib.x86_64 0:2.0.12-1.el7 will be installed
–> Finished Dependency Resolution

Dependencies Resolved

======================================================================================================

Package Arch Version Repository Size

Installing:
oracleasmlib x86_64 2.0.12-1.el7 /oracleasmlib-2.0.12-1.el7.x86_64 39 k

Transaction Summary

Install 1 Package

Total size: 39 k
Installed size: 39 k
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : oracleasmlib-2.0.12-1.el7.x86_64 1/1
Verifying : oracleasmlib-2.0.12-1.el7.x86_64 1/1

Installed:
oracleasmlib.x86_64 0:2.0.12-1.el7

Complete!
I have downloaded oracleasm-support using OTN link:

wget http://yum.oracle.com/repo/OracleLinux/OL7/latest/x86_64/getPackage/oracleasm-support-2.1.8-3.el7.x86_64.rpm

–2016-01-12 20:02:03– http://yum.oracle.com/repo/OracleLinux/OL7/latest/x86_64/getPackage/oracleasm-support-2.1.8-3.el7.x86_64.rpm
Resolving yum.oracle.com (yum.oracle.com)… 2.22.22.225, 2.22.22.218
Connecting to yum.oracle.com (yum.oracle.com)|2.22.22.225|:80… connected.
HTTP request sent, awaiting response… 200 OK
Length: 80968 (79K) [application/x-rpm]
Saving to: ‚oracleasm-support-2.1.8-3.el7.x86_64.rpm‚

100%[======================================>] 80,968 328KB/s in 0.2s

2016-01-12 21:02:03 (328 KB/s) – ‚oracleasm-support-2.1.8-3.el7.x86_64.rpm‚ saved [80968/80968]
I have installed it with:

yum -y localinstall oracleasm-support-2.1.8-3.el7.x86_64.rpm

Loaded plugins: fastestmirror
Examining oracleasm-support-2.1.8-3.el7.x86_64.rpm: oracleasm-support-2.1.8-3.el7.x86_64
Marking oracleasm-support-2.1.8-3.el7.x86_64.rpm to be installed
Resolving Dependencies
–> Running transaction check
—> Package oracleasm-support.x86_64 0:2.1.8-3.el7 will be installed
–> Finished Dependency Resolution

Dependencies Resolved

======================================================================================================

Package Arch Version Repository Size

Installing:
oracleasm-support x86_64 2.1.8-3.el7 /oracleasm-support-2.1.8-3.el7.x86_64 242 k

Transaction Summary

Install 1 Package

Total size: 242 k
Installed size: 242 k
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : oracleasm-support-2.1.8-3.el7.x86_64 1/1
Note: Forwarding request to ‘systemctl enable oracleasm.service’.
Created symlink from /etc/systemd/system/multi-user.target.wants/oracleasm.service to /usr/lib/systemd/system/oracleasm.service.
Verifying : oracleasm-support-2.1.8-3.el7.x86_64 1/1

Installed:
oracleasm-support.x86_64 0:2.1.8-3.el7
Complete!
I have created oracle user account and related groups because they must own the ASM devices:

groupadd –gid 54321 oinstall

groupadd –gid 54322 dba

useradd –uid 54321 –gid 54321 –groups 54322 oracle

id oracle

uid=54321(oracle) gid=54321(oinstall) groups=54321(oinstall),54322(dba)
ASMLib configuration
I have created a single disk partition in ASM device disk:

fdisk /dev/sdb

Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0xe7333a6d.

Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-24657919, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-24657919, default 24657919):
Using default value 24657919
Partition 1 of type Linux and of size 11.8 GiB is set

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
I have configured ASMLib and created an ASM disk with oracleasm command:

oracleasm configure -i

Configuring the Oracle ASM library driver.

This will configure the on-boot properties of the Oracle ASM library
driver. The following questions will determine whether the driver is
loaded on boot and what permissions it will have. The current values
will be shown in brackets (‘[]’). Hitting without typing an
answer will keep that current value. Ctrl-C will abort.

Default user to own the driver interface []: oracle
Default group to own the driver interface []: dba
Scan for Oracle ASM disks on boot (y/n) [y]:
Writing Oracle ASM library driver configuration: done

oracleasm init

Creating /dev/oracleasm mount point: /dev/oracleasm
Loading module “oracleasm”: oracleasm
Configuring “oracleasm” to use device physical block size
Mounting ASMlib driver filesystem: /dev/oracleasm

oracleasm createdisk ASM1 /dev/sdb1

Writing disk header: done
Instantiating disk: done

oracleasm querydisk /dev/sdb1

Device “/dev/sdb1” is marked an ASM disk with the label “ASM1”
I have rebooted to check ASM disk device persistence:

oracleasm status

Checking if ASM is loaded: yes
Checking if /dev/oracleasm is mounted: yes

oracleasm listdisks

ASM1

ls -al /dev/oracleasm/disks

total 0
drwxr-xr-x. 1 root root 0 Jan 12 20:52 .
drwxr-xr-x. 4 root root 0 Jan 12 20:52 ..
brw-rw—-. 1 oracle dba 8, 17 Jan 12 20:52 ASM1
As expected the ASM device is persistent.

Note also that there is a systemd service named oracleasm created for oracleasm Linux kernel module:

systemctl status oracleasm

oracleasm.service – Load oracleasm Modules
Loaded: loaded (/usr/lib/systemd/system/oracleasm.service; enabled; vendor preset: disabled)
Active: active (exited) since Tue 2016-01-12 20:52:29 CET; 51s ago
Process: 609 ExecStart=/usr/sbin/service oracleasm start_sysctl (code=exited, status=0/SUCCESS)
Main PID: 609 (code=exited, status=0/SUCCESS)
CGroup: /system.slice/oracleasm.service

Jan 12 20:52:26 co7tosa0.localdomain systemd[1]: Starting Load oracleasm Mod….
Jan 12 20:52:27 co7tosa0.localdomain service[609]: Initializing the Oracle AS…
Jan 12 20:52:29 co7tosa0.localdomain service[609]: Scanning the system for Or…
Jan 12 20:52:29 co7tosa0.localdomain systemd[1]: Started Load oracleasm Modules.
Hint: Some lines were ellipsized, use -l to show in full.

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