multicluster-gateway-controller¶

Description:¶

The multi-cluster gateway controller, leverages the gateway API standard and Open Cluster Management to provide multi-cluster connectivity and global load balancing

Key Features:

Central Gateway Definition that can then be distributed to multiple clusters
Automatic TLS and cert distribution for HTTPS based listeners
DNSPolicy to decide how North-South based traffic should be balanced and reach the gateways
Health checks to detect and take remedial action against unhealthy endpoints
Cloud DNS provider integrations (AWS route 53) with new ones being added (google DNS)

When deploying the multicluster gateway controller using the make targets, the following will be created:

Kind cluster(s)
Gateway API CRDs in the control plane cluster
Ingress controller
Cert manager
LetsEncrypt certs

Prerequisites:¶

AWS or GCP
Various dependencies installed into $(pwd)/bin e.g. kind, yq etc.
Run make dependencies
openssl>=3
- On macOS a later version is available with brew install openssl. You'll need to update your PATH as macOS provides an older version via libressl as well
- On Fedora use dnf install openssl
go >= 1.21

1. Running the controller in the cluster:¶

Set up your DNS Provider by following these steps

Setup your local environment

make local-setup MGC_WORKLOAD_CLUSTERS_COUNT=<NUMBER_WORKLOAD_CLUSTER>

Build the controller image and load it into the control plane sh kubectl config use-context kind-mgc-control-plane make kind-load-gateway-controller
Deploy the controller(s) to the control plane cluster
```
make deploy-gateway-controller
```

(Optional) View the logs of the deployed controller

kubectl logs -f $(kubectl get pods -n multi-cluster-gateways | grep "mgc-" | awk '{print $1}') -n multi-cluster-gateways

2. Running the controller locally:¶

Set up your DNS Provider by following these steps

Setup your local environment

make local-setup MGC_WORKLOAD_CLUSTERS_COUNT=<NUMBER_WORKLOAD_CLUSTER>

Run the controller locally:

kubectl config use-context kind-mgc-control-plane 
make build-gateway-controller run-gateway-controller

3. Clean up local environment¶

In any terminal window target control plane cluster by:

kubectl config use-context kind-mgc-control-plane

If you want to wipe everything clean consider using:

make local-cleanup # Remove kind clusters created locally and cleanup any generated local files.

If the intention is to cleanup kind cluster and prepare them for re-installation consider using:

make local-cleanup-mgc MGC_WORKLOAD_CLUSTERS_COUNT=<NUMBER_WORKLOAD_CLUSTER> # prepares clusters for make local-setup-mgc

License¶

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.