Kubeadm Hosted Install

This document outlines how to install Calico, as well as a as single node etcd cluster for use by Calico on a Kubernetes cluster created by kubeadm.

Users who have deployed their own etcd cluster outside of kubeadm should use the Calico only manifest instead, as it does not deploy its own etcd.

You can easily create a cluster compatible with this manifest by following the official kubeadm guide.

Installation

To install this Calico and a single node etcd on a run the following command depending on your kubeadm / kubernetes version:

For Kubeadm 1.5 with Kubernetes 1.5.x:

kubectl apply -f http://docs.projectcalico.org/master/getting-started/kubernetes/installation/hosted/kubeadm/calico.yaml

Click here to view the above yaml directly.

For Kubeadm 1.6 with Kubernetes 1.6.x:

kubectl apply -f http://docs.projectcalico.org/master/getting-started/kubernetes/installation/hosted/kubeadm/1.6/calico.yaml

Click here to view the above yaml directly.

About

This manifest deploys the standard Calico components described here as well as a dedicated Calico etcd node on the Kubernetes master. Note that in a production cluster, it is recommended you use a secure, replicated etcd cluster.

This manifest uses a node label to select the master node on which Calico’s etcd is run. This label is configured automatically on the master when using kubeadm.

To check if the required label is applied, run the following command and inspect the output for the correct label:

$ kubectl get node <master_name> -o yaml

Requirements / Limitations

  • This install does not configure etcd TLS
  • This install expects that one Kubernetes master node has been labeled with:
    • For Kubeadm 1.5 kubeadm.alpha.kubernetes.io/role: master
    • For Kubeadm 1.6 node-role.kubernetes.io/master: ""
  • This install assumes no other pod network has been installed.
  • The CIDR(s) specified with the flag --cluster-cidr (pre 1.6) or --pod-network-cidr (1.6+) must match the Calico IP Pools to have Network Policy function correctly. The default is 192.168.0.0/16.
  • The CIDR specified with the flag --service-cidr should not overlap with the Calico IP Pool.
    • The default CIDR for --service-cidr is 10.96.0.0/12.
    • The calico.yaml(s) linked sets the Calico IP Pool to 192.168.0.0/16.