x86-64, arm64, ppc64le, or s390x processor
- Linux kernel 3.10 or later with required dependencies.
The following distributions have the required kernel, its dependencies, and are
known to work well with Calico and OpenShift.
- RedHat Linux 7
- RedHat Container OS
Calico must be able to manage
cali*interfaces on the host. When IPIP is enabled (the default), Calico also needs to be able to manage
tunl*interfaces. When VXLAN is enabled, Calico also needs to be able to manage the
Note: Many Linux distributions, such as most of the above, include NetworkManager. By default, NetworkManager does not allow Calico to manage interfaces. If your nodes have NetworkManager, complete the steps in Preventing NetworkManager from controlling Calico interfaces before installing Calico.
If your Linux distribution comes with installed Firewalld or another iptables manager it should be disabled. These may interfere with rules added by Calico and result in unexpected behavior.
Note: If a host firewall is needed, it can be configured by Calico HostEndpoint and GlobalNetworkPolicy. More information about configuration at Security for host.
Calico v3.20 requires a key/value store accessible by all Calico components. With OpenShift, the Kubernetes API datastore is used for the key/value store.
Ensure that your hosts and firewalls allow the necessary traffic based on your configuration.
|Calico networking (BGP)||All||Bidirectional||TCP 179|
|Calico networking with IP-in-IP enabled (default)||All||Bidirectional||IP-in-IP, often represented by its protocol number
|Calico networking with VXLAN enabled||All||Bidirectional||UDP 4789|
|Typha access||Typha agent hosts||Incoming||TCP 5473 (default)|
|All||kube-apiserver host||Incoming||Often TCP 443 or 8443*|
* The value passed to kube-apiserver using the
--secure-port flag. If you cannot locate this, check the
targetPort value returned by
kubectl get svc kubernetes -o yaml.
Ensure that Calico has the
The simplest way to provide the necessary privilege is to run Calico as root or in a privileged container.
Calico v3.20 supports:
- OpenShift Container Platform 4.3+
Refer to the OpenShift documentation for additional requirements.
Tip: If you are using one of the recommended distributions, you will already satisfy these.
ipip(if using Calico networking in IPIP mode)
wireguard(if using WireGuard encryption)