System requirements

Node requirements

  • AMD64 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
    • CentOS 7

Key/value store

Calico v3.1 requires a key/value store accessible by all Calico components. On OpenShift, Calico can share an etcdv3 cluster with OpenShift, or you can set up an etcdv3 cluster dedicated to Calico.

Network requirements

Calico requires the network to allow the following types of traffic.

Traffic Protocol Port
IPIP* 4 n/a

* Our manifests enable IPIP by default. If you disable IPIP, you won’t need to allow IPIP traffic. Refer to Configuring IP-in-IP for more information.

Tip: On GCE, you can allow this traffic using firewall rules. In AWS, use EC2 security group rules.

OpenShift requirements

Calico v3.1 supports:

  • OpenShift Origin 3.6 and 3.7
  • OpenShift Container Platform 3.6 and 3.7

Refer to the OpenShift documentation for additional requirements.

Kernel dependencies

Tip: If you are using one of the recommended distributions, you will already satisfy these.

  • nf_conntrack_netlink subsystem
  • ip_tables (for IPv4)
  • ip6_tables (for IPv6)
  • ip_set
  • xt_set
  • ipt_set
  • ipt_rpfilter
  • ipt_REJECT
  • ipip (if using Calico networking)