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 OpenStack.
    • RedHat Linux 7
    • Ubuntu 16.04
    • CentOS 7
  • 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.

    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.

Key/value store

Calico v3.9 requires a key/value store accessible by all Calico components. For production you will likely want multiple nodes for greater performance and reliability. If you don’t already have an etcdv3 cluster to connect to, please refer to the upstream etcd docs for detailed advice and setup.

Network requirements

Ensure that your hosts and firewalls allow the necessary traffic based on your configuration.

Configuration Host(s) Connection type Port/protocol
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 4
All etcd hosts Incoming Officially TCP 2379 but can vary

* If your compute hosts connect directly and don’t use IP-in-IP, you don’t need to allow IP-in-IP traffic.

Privileges

Ensure that Calico has the CAP_SYS_ADMIN privilege.

The simplest way to provide the necessary privilege is to run Calico as root or in a privileged container.

OpenStack requirements

We aim to develop and maintain the Neutron driver for Calico (networking-calico) so that its master code works with OpenStack master or any previous release (back to Icehouse), on any operating system, independently of the deployment mechanism that is used to install it.

However, we recommend using OpenStack Newton or later, and our active support and testing of Calico v3.9 with OpenStack is limited to the following versions:

  • Pike
  • Queens

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)

Nova patch needed with Mitaka and earlier

With OpenStack Mitaka and earlier, and if your libvirt is >= 1.3.3 and < 3.1, you will need to patch the Nova code post installation, on each compute host, as in this change. In case you need the same Nova code to work with all possible libvirt versions, you should then add this further change. OpenStack Newton and later already include these two changes.