c12s-kubespray/docs/calico.md

Calico

Check if the calico-node container is running

docker ps | grep calico

The calicoctl command allows to check the status of the network workloads.

• Check the status of Calico nodes

calicoctl node status

or for versions prior v1.0.0:

calicoctl status

• Show the configured network subnet for containers

calicoctl get ippool -o wide

or for versions prior v1.0.0:

calicoctl pool show

• Show the workloads (ip addresses of containers and their located)

calicoctl get workloadEndpoint -o wide

and

calicoctl get hostEndpoint -o wide

or for versions prior v1.0.0:

calicoctl endpoint show --detail

Optional : Define network backend

In some cases you may want to define Calico network backend. Allowed values are 'bird', 'gobgp' or 'none'. Bird is a default value.

To re-define you need to edit the inventory and add a group variable calico_network_backend

calico_network_backend: none

Optional : BGP Peering with border routers

In some cases you may want to route the pods subnet and so NAT is not needed on the nodes. For instance if you have a cluster spread on different locations and you want your pods to talk each other no matter where they are located. The following variables need to be set: peer_with_router to enable the peering with the datacenter's border router (default value: false). you'll need to edit the inventory and add a and a hostvar local_as by node.

node1 ansible_ssh_host=95.54.0.12 local_as=xxxxxx

Optional : Define global AS number

Optional parameter global_as_num defines Calico global AS number (/calico/bgp/v1/global/as_num etcd key). It defaults to "64512".

Optional : BGP Peering with route reflectors

At large scale you may want to disable full node-to-node mesh in order to optimize your BGP topology and improve calico-node containers' start times.

To do so you can deploy BGP route reflectors and peer calico-node with them as recommended here:

• https://hub.docker.com/r/calico/routereflector/
• http://docs.projectcalico.org/v2.0/reference/private-cloud/l3-interconnect-fabric

You need to edit your inventory and add:

• calico-rr group with nodes in it. At the moment it's incompatible with kube-node due to BGP port conflict with calico-node container. So you should not have nodes in both calico-rr and kube-node groups.
• cluster_id by route reflector node/group (see details here)

Here's an example of Kargo inventory with route reflectors:

[all]
rr0 ansible_ssh_host=10.210.1.10 ip=10.210.1.10
rr1 ansible_ssh_host=10.210.1.11 ip=10.210.1.11
node2 ansible_ssh_host=10.210.1.12 ip=10.210.1.12
node3 ansible_ssh_host=10.210.1.13 ip=10.210.1.13
node4 ansible_ssh_host=10.210.1.14 ip=10.210.1.14
node5 ansible_ssh_host=10.210.1.15 ip=10.210.1.15

[kube-master]
node2
node3

[etcd]
node2
node3
node4

[kube-node]
node2
node3
node4
node5

[k8s-cluster:children]
kube-node
kube-master

[calico-rr]
rr0
rr1

[rack0]
rr0
rr1
node2
node3
node4
node5

[rack0:vars]
cluster_id="1.0.0.1"

The inventory above will deploy the following topology assuming that calico's global_as_num is set to 65400:

Cloud providers configuration

Please refer to the official documentation, for example GCE configuration requires a security rule for calico ip-ip tunnels. Note, calico is always configured with ipip: true if the cloud provider was defined.