You must configure the base operating system of your node machines to use Google Distributed Cloud. This page contains the steps you need to take to complete the needed configuration.
For more information about troubleshooting Google Distributed Cloud requirements, see the troubleshooting guides.
Before you begin
Ensure you are using a supported version of your operating system. Anthos on bare metal supports the following versions for CentOS:
- CentOS 8.1
- CentOS 8.2
Ensure you have root access to the machines you are configuring.
Validate Package manager with the following steps:
Check for updates:
sudo dnf check-update
Ensure the output has no errors and the last metadata expiration check, for example:
# Last metadata expiration check: ... ... google-cloud-sdk.x86_64 ...
Setting SELinux to permissive
Set SELinux to permissive:
sudo setenforce 0 # temporary sudo sed -i 's/SELINUX=enforcing/SELINUX=permissive/g' /etc/selinux/config # persistent - requires reboot
Verify SELinux is set to permissive:
sudo sestatus | grep "Current mode" # Output # Current mode: permissive
Disabling firewalld
Disable
firewalld
:sudo systemctl stop firewalld sudo systemctl disable firewalld
Check the status of
firewalld
to ensure it is disabled:sudo systemctl status firewalld | grep "Active" # Output # Active: inactive (dead)
Configuring Docker 19.03+ on your workstation
Google Distributed Cloud helps you install Docker on your bare metal machines in the following scenarios:
- If your bare metal machines don't have Docker installed,
bmctl
installs 19.03.13 or later. - If your bare metal machines have Docker 19.03.5 or earlier installed,
bmctl
upgrades 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
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
Setting up time synchronization
To ensure proper time synchronization, install an NTP service on your machines using any of the available services: chrony, systemd-timesyncd, ntp, or ntpdate. Run timedatectl
to verify the system clock is synchronized. The output of timedatectl
should contain the following status:
System clock synchronized: yes