Getting Started Using Minikube

This guide uses minikube to demonstrate deployment and operation of Cilium in a single-node Kubernetes cluster. The minikube VM requires approximately 5GB of RAM and supports hypervisors like VirtualBox that run on Linux, macOS, and Windows.

Install kubectl & minikube

  1. Install kubectl version >= v1.10.0 as described in the Kubernetes Docs
  2. Install minikube >= v1.3.1 as per minikube documentation: Install Minikube.

Note

It is important to validate that you have minikube v1.3.1 installed. Older versions of minikube are shipping a kernel configuration that is not compatible with the TPROXY requirements of Cilium >= 1.6.0.

minikube version
minikube version: v1.3.1
commit: ca60a424ce69a4d79f502650199ca2b52f29e631
  1. Create a minikube cluster:
minikube start --network-plugin=cni --memory=4096
  1. Mount the BPF filesystem
minikube ssh -- sudo mount bpffs -t bpf /sys/fs/bpf

Note

In case of installing Cilium for a specific Kubernetes version, the --kubernetes-version vx.y.z parameter can be appended to the minikube start command for bootstrapping the local cluster. By default, minikube will install the most recent version of Kubernetes.

Install Cilium

Install Cilium as DaemonSet into your new Kubernetes cluster. The DaemonSet will automatically install itself as Kubernetes CNI plugin.

With quick-install.yaml
With experimental-install.yaml

Note

quick-install.yaml is a pre-rendered Cilium chart template. The template is generated using helm template command with default configuration parameters without any customization.

In case of installing Cilium with CRIO, please see CRIO instructions.

kubectl create -f https://raw.githubusercontent.com/cilium/cilium/v1.8/install/kubernetes/quick-install.yaml

Warning

experimental-install.yaml is a pre-rendered Cilium chart template with experimental features enabled. These features may include unreleased or beta features that are not considered production-ready. While it provides a convenient way to try out experimental features, It should only be used in testing environments.

kubectl create -f https://raw.githubusercontent.com/cilium/cilium/v1.8/install/kubernetes/experimental-install.yaml

Validate the Installation

You can monitor as Cilium and all required components are being installed:

kubectl -n kube-system get pods --watch
NAME                                    READY   STATUS              RESTARTS   AGE
cilium-operator-cb4578bc5-q52qk         0/1     Pending             0          8s
cilium-s8w5m                            0/1     PodInitializing     0          7s
coredns-86c58d9df4-4g7dd                0/1     ContainerCreating   0          8m57s
coredns-86c58d9df4-4l6b2                0/1     ContainerCreating   0          8m57s

It may take a couple of minutes for all components to come up:

cilium-operator-cb4578bc5-q52qk         1/1     Running   0          4m13s
cilium-s8w5m                            1/1     Running   0          4m12s
coredns-86c58d9df4-4g7dd                1/1     Running   0          13m
coredns-86c58d9df4-4l6b2                1/1     Running   0          13m

Deploy the connectivity test

You can deploy the “connectivity-check” to test connectivity between pods.

kubectl apply -f https://raw.githubusercontent.com/cilium/cilium/v1.8/examples/kubernetes/connectivity-check/connectivity-check.yaml

It will deploy a series of deployments which will use various connectivity paths to connect to each other. Connectivity paths include with and without service load-balancing and various network policy combinations. The pod name indicates the connectivity variant and the readiness and liveness gate indicates success or failure of the test:

NAME                                                    READY   STATUS    RESTARTS   AGE
echo-a-5995597649-f5d5g                                 1/1     Running   0          4m51s
echo-b-54c9bb5f5c-p6lxf                                 1/1     Running   0          4m50s
echo-b-host-67446447f7-chvsp                            1/1     Running   0          4m50s
host-to-b-multi-node-clusterip-78f9869d75-l8cf8         1/1     Running   0          4m50s
host-to-b-multi-node-headless-798949bd5f-vvfff          1/1     Running   0          4m50s
pod-to-a-59b5fcb7f6-gq4hd                               1/1     Running   0          4m50s
pod-to-a-allowed-cnp-55f885bf8b-5lxzz                   1/1     Running   0          4m50s
pod-to-a-external-1111-7ff666fd8-v5kqb                  1/1     Running   0          4m48s
pod-to-a-l3-denied-cnp-64c6c75c5d-xmqhw                 1/1     Running   0          4m50s
pod-to-b-intra-node-845f955cdc-5nfrt                    1/1     Running   0          4m49s
pod-to-b-multi-node-clusterip-666594b445-bsn4j          1/1     Running   0          4m49s
pod-to-b-multi-node-headless-746f84dff5-prk4w           1/1     Running   0          4m49s
pod-to-b-multi-node-nodeport-7cb9c6cb8b-ksm4h           1/1     Running   0          4m49s
pod-to-external-fqdn-allow-google-cnp-b7b6bcdcb-tg9dh   1/1     Running   0          4m48s

Note

If you deploy the connectivity check to a single node cluster, pods that check multi-node functionalities will remain in the Pending state. This is expected since these pods need at least 2 nodes to be scheduled successfully.

Next steps

Now that you have a Kubernetes cluster with Cilium up and running, you can take a couple of next steps to explore various capabilities: