RedHat Enterprise Linux 8 changes the way packages are delivered by splitting the main repository that was available on RedHat 7 systems to the below two (link with more information is attached at the bottom of the article)
As a result when you locally mount a DVD to be used as a repository for packages one should create now two repositories instead of one.
Attach dvd to virtual server, mount directory and create repositories on /etc/yum.repos.d
Create repository files
touch appstream.repo baseos.repo
Change permissions to repository files to 0644
name=Red Hat Enterprise Linux8.2.0AppStream
name=Red Hat Enterprise Linux8.2.0BaseOS
Validate that both repos are enabled
Find below the procedure documented from RedHat for Linux 7
With the latest version of pcs package there are some changes regarding the implementation of a highly available cluster which is based on centos/redhat operating system. Currently the latest package available for pcs is the 0.10.4 as shown below on which cluster with pacemaker 2.x and corosync 3.x are supported.
Firstly authenticate the nodes of the cluster (changed from previous versions)
Shutdown the node on which cluster resource IPaddr2 is running and verify that IP is still accessible. You can verify during the shutdown and the resource migration from one node to another that icmp package respond is a bit slower. (3ms instead of <1ms)
Verify that cluster resource cluster-ip is online on the second node.
The below error can occur when one tries to create a new HA cluster with pcs package. Corosync fails to start with the below description.
The error can be resolved by editing /etc/hosts file and by commenting the first two lines for localhost. At the end I appended a new line that maps localhost with a specific IPv4 IP but this could be unnecessary.
After that when one tries to create and enable the cluster the result would be successful.