Configuring the Deployment Environment

This section uses three servers and three clients as an example.

1. Set the host name on each node.

   1 2 3 4 5 6

   hostnamectl set-hostname ceph1 hostnamectl set-hostname ceph2 hostnamectl set-hostname ceph3 hostnamectl set-hostname client1 hostnamectl set-hostname client2 hostnamectl set-hostname client3

2. Configure the host names on the three hosts and add the following content to the /etc/hosts file:

   1 2 3 4 5 6

   [IP] ceph1 [IP] ceph2 [IP] ceph3 [IP] client1 [IP] client2 [IP] client3

   

   Change [IP] to the actual local IP address.

3. Configure password-free login on ceph1, ceph2, and ceph3.

   1 2	ssh-keygen -t rsa for i in {1..3};do ssh-copy-id ceph$i;done

4. Disable the firewall.

   1 2 3

   systemctl stop firewalld systemctl disable firewalld systemctl status firewalld

5. Disable SELinux.

   1 2	setenforce 0 sed -i 's/=permissive/=disabled/g' /etc/selinux/config

6. Configure clock synchronization on ceph1, ceph2, and ceph3.
   1. Install the chrony service.

      1	dnf install -y chrony

   2. Back up the configuration file.

      1	mv /etc/chrony.conf /etc/chrony.conf.bak

   3. Modify the configuration file.

      1 2 3 4 5

      cat > /etc/chrony.conf <<EOF server xxx iburst # xxx indicates the IP address of the synchronization service. allow xxx/xx # xxx indicates the local IP address. local stratum 10 EOF

   4. Restart chrony.

      1 2	systemctl restart chronyd systemctl enable chronyd

   5. Check the time synchronization status.

      1 2 3

      chronyc -a makestep # Forcibly synchronize the system time. chronyc sourcestats # Display the synchronization statistics of the current time source. chronyc sources -v # Display detailed information about the current time source.