Install iptables on the new ECS master nodes
You must install iptables
on all of the additional ECS master
nodes.
If your ECS hosts are running the CentOS 8.4, OEL 8.4, or RHEL 8 operating systems, you must
install iptables
on all the ECS hosts. Run the following command on each
additional ECS master node:
yum --setopt=tsflags=noscripts install -y iptables