Antrea Operator For Kubernetes

Overview

The Antrea Operator installs Antrea CNI plugin on a Kubernetes cluster. The operator will be deployed as deployment and it will take care of deploying Antrea components:

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

At the moment the antrea operator only works on OpenShift 4 platform, the support for other platforms is still in progress.

The antrea operator uses a dedicated CRD(AntreaInstall) object for antrea-controller and antrea-agent configuration. Users can set antrea configurations using the CRD instance. The operator monitors the update of AntreaInstall CR and restarts the relevant pods so that the relevant configuration changes are picked up.

Build

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

make all

To build antrea operator binary. Run the following command.

make bin

Try it out on OpenShift 4 cluster

For Openshift 4 clusters, antrea operator will be deployed in the early phases of cluster deployment. 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.

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/ 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.

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:
  networkType: antrea
  clusterNetwork:
  - cidr: 10.10.0.0/14
  serviceNetwork:
  - 172.30.0.0/16

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.

Contributing

We welcome community contributions to the Antrea operator for Kubernetes!

Before you start submitting code to antrea-operator-for-kuberentes, you should sign our contributor license agreement (CLA).

If you wish to contribute code and you have not signed our CLA, our bot will update the issue when you open a Pull Request. For more detailed information, refer to CONTRIBUTING.md.

For any questions about the CLA process, please refer to our FAQ.

License

This repository is available under the Apache 2.0 license.