Home / Pacemaker / RHEL 7 – Installing Redhat Cluster Software (Corosync/pacemaker) – Part 3

RHEL 7 – Installing Redhat Cluster Software (Corosync/pacemaker) – Part 3

In this article, we will see that how to install Redhat cluster software (Pacemaker) on RHEL 7. If you have valid redhat subscription , you can directly configure redhat repository and install the packages. It also available in the RHEL 7 ISO image as an Add-on Package. Unlike previous redhat cluster releases , Redhat cluster 7 installation looks very simple since redhat has moved to pacemaker & corosync. Prior to proceeding with installation, I would request to go through the following articles.

 

 

Environment:

  • Operating System: Redhat Enterprise Linux 7.2
  • Repository : Local YUM Repository using RHEL 7.2 DVD ISO image.
  • Type of Cluster : Active / Passive – Two Node cluster
  • Cluster Resource : KVM guest (VirtualDomain)

 

 

YUM Repository configuration for OS , HA & Storage:

 

1. Copy the RHEL 7.2 DVD ISO image to the system or attach as DVD device.

2. Mount the ISO Image /DVD under “/repo”

[root@UA-HA ~]# df -h /repo
Filesystem      Size  Used Avail Use% Mounted on
/dev/sr1        3.8G  3.8G     0 100% /repo
[root@UA-HA ~]#

 

3.List the DVD contents.

[root@UA-HA ~]# ls -lrt /repo
total 872
-r--r--r--  1 root root  18092 Mar  6  2012 GPL
-r--r--r--  1 root root   8266 Apr  4  2014 EULA
-r--r--r--  1 root root   3211 Oct 23 09:25 RPM-GPG-KEY-redhat-release
-r--r--r--  1 root root   3375 Oct 23 09:25 RPM-GPG-KEY-redhat-beta
-r--r--r--  1 root root    114 Oct 30 10:54 media.repo
-r--r--r--  1 root root   1568 Oct 30 11:03 TRANS.TBL
dr-xr-xr-x  2 root root   4096 Oct 30 11:03 repodata
dr-xr-xr-x 24 root root   6144 Oct 30 11:03 release-notes
dr-xr-xr-x  2 root root 835584 Oct 30 11:03 Packages
dr-xr-xr-x  2 root root   2048 Oct 30 11:03 LiveOS
dr-xr-xr-x  2 root root   2048 Oct 30 11:03 isolinux
dr-xr-xr-x  3 root root   2048 Oct 30 11:03 images
dr-xr-xr-x  3 root root   2048 Oct 30 11:03 EFI
dr-xr-xr-x  4 root root   2048 Oct 30 11:03 addons
[root@UA-HA ~]#

4. Create the yum repository file with name of “ua.repo” and update with following contents. (Except “cat” command line)

[root@UA-HA ~]# cat /etc/yum.repos.d/ua.repo
[repo-update]
gpgcheck=0
enabled=1
baseurl=file:///repo
name=repo-update

[repo-ha]
gpgcheck=0
enabled=1
baseurl=file:///repo/addons/HighAvailability
name=repo-ha

[repo-storage]
gpgcheck=0
enabled=1
baseurl=file:///repo/addons/ResilientStorage
name=repo-storage
[root@UA-HA ~]#

 

5.List the configured yum repositories.

[root@UA-HA ~]# yum repolist
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
repo id                                                                         repo name                                                                      status
!repo-ha                                                                        repo-ha                                                                           30
!repo-storage                                                                   repo-storage                                                                      37
!repo-update                                                                    repo-update                                                                    4,620
repolist: 4,687
[root@UA-HA ~]#

We have successfully configured the YUM local repository using RHEL 7.2 ISO image.

 

 

Installing Cluster Packages on Nodes:

 

1.Login to the RHEL 7.2 node as root user.

 

2. Execute the following command to install the cluster packages and it’s dependencies. Corosync will install along with pacemaker.

[root@UA-HA ~]# yum install -y pacemaker pcs psmisc policycoreutils-python
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Resolving Dependencies
--> Running transaction check
---> Package pacemaker.x86_64 0:1.1.13-10.el7 will be installed
--> Processing Dependency: pacemaker-cli = 1.1.13-10.el7 for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: pacemaker-cluster-libs = 1.1.13-10.el7 for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: pacemaker-libs = 1.1.13-10.el7 for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: corosync for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libcfg.so.6(COROSYNC_CFG_0.82)(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libcmap.so.4(COROSYNC_CMAP_1.0)(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libcpg.so.4(COROSYNC_CPG_1.0)(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libquorum.so.5(COROSYNC_QUORUM_1.0)(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: resource-agents for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libcfg.so.6()(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libcib.so.4()(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libcmap.so.4()(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libcorosync_common.so.4()(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libcpg.so.4()(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libcrmcluster.so.4()(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libcrmcommon.so.3()(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libcrmservice.so.3()(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: liblrmd.so.1()(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libpe_rules.so.2()(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libpe_status.so.4()(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libpengine.so.4()(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libquorum.so.5()(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libstonithd.so.2()(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
--> Processing Dependency: libtransitioner.so.2()(64bit) for package: pacemaker-1.1.13-10.el7.x86_64
---> Package pcs.x86_64 0:0.9.143-15.el7 will be installed
---> Package policycoreutils-python.x86_64 0:2.2.5-20.el7 will be installed
---> Package psmisc.x86_64 0:22.20-9.el7 will be installed
--> Running transaction check
---> Package corosync.x86_64 0:2.3.4-7.el7 will be installed
---> Package corosynclib.x86_64 0:2.3.4-7.el7 will be installed
---> Package pacemaker-cli.x86_64 0:1.1.13-10.el7 will be installed
---> Package pacemaker-cluster-libs.x86_64 0:1.1.13-10.el7 will be installed
---> Package pacemaker-libs.x86_64 0:1.1.13-10.el7 will be installed
---> Package resource-agents.x86_64 0:3.9.5-54.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=============================================================================================
 Package                       Arch          Version                Repository          Size
=============================================================================================
Installing:
 pacemaker                     x86_64        1.1.13-10.el7          repo-ha            462 k
 pcs                           x86_64        0.9.143-15.el7         repo-ha            4.7 M
 policycoreutils-python        x86_64        2.2.5-20.el7           repo-update        435 k
 psmisc                        x86_64        22.20-9.el7            repo-update        140 k
Installing for dependencies:
 corosync                      x86_64        2.3.4-7.el7            repo-ha            210 k
 corosynclib                   x86_64        2.3.4-7.el7            repo-ha            124 k
 pacemaker-cli                 x86_64        1.1.13-10.el7          repo-ha            253 k
 pacemaker-cluster-libs        x86_64        1.1.13-10.el7          repo-ha             92 k
 pacemaker-libs                x86_64        1.1.13-10.el7          repo-ha            519 k
 resource-agents               x86_64        3.9.5-54.el7           repo-ha            339 k

Transaction Summary
============================================================================================
Install  4 Packages (+6 Dependent packages)

Total download size: 7.3 M
Installed size: 19 M
Downloading packages:
--------------------------------------------------------------------------------------------
Total                         19 MB/s | 7.3 MB  00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : corosynclib-2.3.4-7.el7.x86_64                  1/10
  Installing : corosync-2.3.4-7.el7.x86_64                     2/10
  Installing : pacemaker-libs-1.1.13-10.el7.x86_64             3/10
  Installing : pacemaker-cli-1.1.13-10.el7.x86_64              4/10
  Installing : psmisc-22.20-9.el7.x86_64                       5/10
  Installing : resource-agents-3.9.5-54.el7.x86_64             6/10
  Installing : pacemaker-cluster-libs-1.1.13-10.el7.x86_64     7/10
  Installing : pacemaker-1.1.13-10.el7.x86_64                  8/10
  Installing : pcs-0.9.143-15.el7.x86_64                       9/10
  Installing : policycoreutils-python-2.2.5-20.el7.x86_64     10/10
  Verifying  : pcs-0.9.143-15.el7.x86_64                       1/10
  Verifying  : corosync-2.3.4-7.el7.x86_64                     2/10
  Verifying  : pacemaker-cli-1.1.13-10.el7.x86_64              3/10
  Verifying  : psmisc-22.20-9.el7.x86_64                       4/10
  Verifying  : resource-agents-3.9.5-54.el7.x86_64             5/10
  Verifying  : pacemaker-cluster-libs-1.1.13-10.el7.x86_64     6/10
  Verifying  : pacemaker-libs-1.1.13-10.el7.x86_64             7/10
  Verifying  : pacemaker-1.1.13-10.el7.x86_64                  8/10
  Verifying  : policycoreutils-python-2.2.5-20.el7.x86_64      9/10
  Verifying  : corosynclib-2.3.4-7.el7.x86_64                 10/10

Installed:
  pacemaker.x86_64 0:1.1.13-10.el7                  pcs.x86_64 0:0.9.143-15.el7        
policycoreutils-python.x86_64 0:2.2.5-20.el7        psmisc.x86_64 0:22.20-9.el7

Dependency Installed:
  corosync.x86_64 0:2.3.4-7.el7          corosynclib.x86_64 0:2.3.4-7.el7       
  pacemaker-cli.x86_64 0:1.1.13-10.el7   pacemaker-cluster-libs.x86_64 0:1.1.13-10.el7
  pacemaker-libs.x86_64 0:1.1.13-10.el7  resource-agents.x86_64 0:3.9.5-54.el7

Complete!
[root@UA-HA ~]#

 

We have successfully installed the cluster packages.

 

Note: crmsh is not available in RHEL 7 which is alternative to pcs commands.

 

In My cluster environment, I have disabled the firewall & selinux to avoid the complexity .

[root@UA-HA ~]# setenforce 0
setenforce: SELinux is disabled
[root@UA-HA ~]#
[root@UA-HA ~]# cat /etc/selinux/config |grep SELINUX |grep -v "#"
SELINUX=disabled
SELINUXTYPE=targeted
[root@UA-HA ~]#
[root@UA-HA ~]# systemctl stop firewalld.service
[root@UA-HA ~]# systemctl disable firewalld.service
[root@UA-HA ~]# iptables --flush
[root@UA-HA ~]# 

 

Hope this article is informative to you. In the next article, we will see that how to configure the cluster using pacemaker.

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