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, see the troubleshooting guides.
Before you begin
Ensure you are using a supported version of your operating system. Google Distributed Cloud supports the following versions for RHEL:
- RHEL 8.1
- RHEL 8.2
- RHEL 8.3
- RHEL 8.4
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: ...
...
Configuring or disabling firewalld
Firewalld can be configured for use with Google Distributed Cloud or disabled. For information on configuring firewalld, see Configuring firewalld ports on the Network requirements page.
The following instructions disable 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
Remove podman-manpages
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 --allowerasing 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.
Best Practices
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 cloud.google.com
.
If Docker fails to run, check that the Docker daemon is running with the following command:
sudo systemctl start docker