Memorandum to make CentOS 7.9 and put pacemaker

environment

# cat /etc/redhat-release
CentOS Linux release 7.3.1611 (Core) 

--A newborn figure with a minimum installation. I just prepared for SSH connection (given IP address). --In your work, yum -y update will change to:

# cat /etc/redhat-release
CentOS Linux release 7.9.2009 (Core)

Until CentOS 7.9

# nmcli con mod eth0 connection.autoconnect yes ipv4.method manual ipv4.address "xxx.xxx.xxx.xxx/xx" ipv4.dns 8.8.8.8 ipv4.gateway "xxx.xxx.xxx.xxx"

# systemctl restart network

# yum -y update
# yum -y install vim

Pacemaker installation

# curl -s https://setup.ius.io/ | sudo sh
# yum -y install pacemaker

You can also use crm_mon and it looks okay

crm command installation

# wget http://download.opensuse.org/repositories/network:/ha-clustering:/Stable/CentOS_CentOS-7/network:ha-clustering:Stable.repo
# mv network\:ha-clustering\:Stable.repo /etc/yum.repos.d/crmsh.repo
# yum -y install crmsh