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- Ensure that your Docker or Containerd environment meets the minimum deployment requirements.
- Open all required ports on the hosts, as list in Port Usage for Bare-Metal Hosts, in addition to the ports required for firewalls.
- Ensure that there are no other processes using port 53 on the host system on which your host will be deployed. For example, some Ubuntu systems running local DNS cache (system-resolved) might occupy port 53, and your host might not function properly in this case.
- Dind (Docker-in-Docker) configuration is not supported for host deployments.
- Avoid CIDR overlapping with the default CIDR.
- No K3s binary should be placed in this directory:
/usr/local/bin/. - SELinux policy is properly set up.
For Red Hat 8.x and 9.x:
Execute the following commands:
yum install -y container-selinux selinux-policy-baserpm -i https://rpm.rancher.io/k3s-selinux-0.1.1-rc1.el7.noarch.rpm
Then, disable nm-cloud-setup.service using the following command:
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