You must configure the base operating system of your node machines to use Anthos clusters on bare metal. This page contains the steps you need to take to complete the needed configuration. For more information about troubleshooting Anthos clusters on bare metal, see the troubleshooting guides.
Before you begin
Ensure you are using a supported version of your operating system. Anthos clusters on bare metal supports the following versions for RHEL:
- RHEL 8.1
- RHEL 8.2
Ensure you have root access to the machines you are configuring, and your RedHat username and password.
Validate Package manager with the following steps:
If you haven't registered your operating system, register with RedHat using your username and password to download updates:
sudo subscription-manager register sudo subscription-manager refresh sudo subscription-manager attach --auto
Check for updates:
sudo dnf check-update
Ensure the output has no errors and the last metadata expiration check, for example:
Updating Subscription Management repositories. ... # Last metadata expiration check: ... ...
Setting SELinux to
Set SELinux to permissive:
sudo setenforce 0 # temporary sudo sed -i 's/SELINUX=enforcing/SELINUX=permissive/g' /etc/selinux/config
After rebooting, verify SELinux is set to permissive:
sudo sestatus | grep "Current mode" # Output # Current mode: permissive
sudo systemctl stop firewalld sudo systemctl disable firewalld
Check the status of
firewalldto ensure it is disabled:
sudo systemctl status firewalld | grep "Active" # Output # Active: inactive (dead)
Configuring Docker 19.03+ on your workstation
Anthos clusters on bare metal helps you install Docker on your bare metal machines in the following scenarios:
- If your bare metal machines don't have Docker installed,
bmctlinstalls 19.03.13 or later.
- If your bare metal machines have Docker 19.03.5 or earlier installed,
bmctlupgrades Docker to version 19.03.13 or later.
Follow these steps to manually install Docker:
Remove any previous Docker version:
sudo dnf remove docker \ docker-client \ docker-client-latest \ docker-common \ docker-latest \ docker-latest-logrotate \ docker-logrotate \ docker-engine
sudo dnf remove podman-manpages
Install Docker 19.03+:
sudo dnf install -y yum-utils sudo yum-config-manager \ --add-repo \ https://download.docker.com/linux/centos/docker-ce.repo sudo dnf install -y docker-ce docker-ce-cli containerd.io sudo systemctl start docker
Verify you are now running version 19.03+:
sudo docker version
Compare your output with the following example to ensure the Client and Server versions are 19.03+ :
Client: Docker Engine - Community Version: 19.03.13 ... Server: Docker Engine - Community Engine: Version: 19.03.13
Verify Docker runs:
docker run hello-world You should see something similar to this: Hello from Docker! This message shows that your installation appears to be working correctly.
To simplify installation, we recommend that you configure RHEL using a minimal installation with headless management. Also, be sure to enable your network connection and either use the default DHCP or provide a valid, static IP address and network information. Ensure the machine can connect to the required external resources, such as
If Docker fails to run, check that the Docker daemon is running with the following command:
sudo systemctl start docker