Antrea Operator

Overview

The Antrea Operator installs Antrea CNI plugin on an OpenShift Kubernetes cluster. The operator will be deployed in the early phases of cluster deployment, and it will take care of deploying Antrea components:

• The antrea-controller deployment
• The antrea-agent daemonset

For Openshift 4 clusters, the antrea-operator monitors cluster network configuration CRD(Network.config.openshift.io/v1) object to update the container network CIDRs and service network CIDRs used by Antrea.

The antrea-operator also monitors a dedicated CRD(AntreaInstall) object, applies changes to antrea-controller and antrea-agent configuration, and restarts the relevant pods so that the relevant configuration changes are picked up.

Try it out

Generate install-config.yaml by using openshift-install command.

$ openshift-install --dir=MY_CLUSTER create install-config

Edit MY_CLUSTER/install-config.yaml to update networking section. Change networkType to antrea(case insensitive). Set container network CIDRs clusterNetwork and serviceNetwork in MY_CLUSTER/install-config.yaml.

Create manifest files:

$ openshift-install --dir=MY_CLUSTER create manifests

Put operator yaml files from deploy/ and deploy/crds/ to MY_CLUSTER/manifests. Edit operator.antrea.vmware.com_v1_antreainstall_cr.yaml to set Antrea configurations and image version.

Generate ignition configuration files:

$ openshift-install --dir=MY_CLUSTER create ignition-configs

This bootstrap ignition file will be added to the terraform tfvars. Then use terraform to install Openshift 4 cluster on vSphere.

Build & Run

Building the antrea-operator is very simple. From the project root directory simply type the following command.

make all

At the moment the antrea-operator only works on Openshift 4 environments.

Documentation

Cluster network config

Cluster network config is initially set in install-config.yaml, user could apply Network.config.openshift.io CRD to update clusterNetwork and serviceNetwork in manifests/cluster-network-02-config.yml.

Example configurations

apiVersion: config.openshift.io/v1
kind: Network
metadata:
  name: cluster
spec:
  clusterNetwork:
  - cidr: 10.10.0.0/14
  networkType: antrea

Operator CR

Operator CR antrea-install is used to provide antrea configurations:

• AntreaAgentConfig holds the configurations for antrea-agent.
• AntreaCNIConfig holds the configurations of CNI.
• AntreaControllerConfig holds the configurations for antrea-controller.
• AntreaImage is the Antrea image name and version used by antrea-agent and antrea-controller.

License

This repository is available under the Apache 2.0 license.