machine-controller-manager-provider-azure

Out of tree (controller based) implementation for Azure as a new provider.

About

The Azure Out Of Tree provider implements the interface defined at MCM OOT driver.

Fundamental Design Principles:

Following are the basic development principles for this external plugin:

• Communication between this Machine Controller (MC) and Machine Controller Manager (MCM) is achieved using the Kubernetes native declarative approach.
• Machine Controller (MC) behaves as the controller used to interact with the cloud provider Microsoft Azure and manage the VMs corresponding to the machine objects.
• Machine Controller Manager (MCM) deals with higher level objects such as MachineSet and MachineDeployment objects.

Usage of the Azure OOT

1. Open terminal pointing to $GOPATH/src/github.com/gardener. Clone this repository.

2. Navigate to $GOPATH/src/github.com/gardener/machine-controller-manager-provider-azure.

   • In the MAKEFILE make sure that

     • $TARGET_KUBECONFIG points to the kubeconfig file of the cluster where you wish to manage machines. This points to the shoot cluster in the context of Gardener.
     • $CONTROL_KUBECONFIG points to the kubeconfig file of the cluster which holds these machine CRs. This points to the seed cluster in the context of Gardener.
     • $CONTROL_NAMESPACE represents the namespaces where MCM is looking for machine CR objects.

   • Run the machine controller (driver) using the command below.

     make start

3. On the second terminal pointing to $GOPATH/src/github.com/gardener,

   • Clone the latest MCM code

     git clone git@github.com:gardener/machine-controller-manager.git

   • Navigate to the newly created directory.

     cd machine-controller-manager

   • Deploy the required CRDs from the machine-controller-manager repo,

     kubectl apply -f kubernetes/crds.yaml

   • Run the machine-controller-manager

     make start

4. On the third terminal pointing to $GOPATH/src/github.com/gardener/machine-controller-manager-provider-azure

   Fill in the object files given below and deploy them as described below:

   • Deploy kubernetes secret for Azure.

     kubectl apply -f kubernetes/secret.yaml

   • Deploy MachineClass

     kubectl apply -f kubernetes/machine-class.yaml

   • Deploy Machine object and make sure it joins the cluster successfully.

     kubectl apply -f kubernetes/machine.yaml

   • Once machine joins, you can test by deploying a machine-deployment.

   • Deploy the MachineDeployment object and make sure it joins the cluster successfully.

     kubectl apply -f kubernetes/machine-deployment.yaml

   • Make sure to delete both the Machine and MachineDeployment object after use.

     kubectl delete -f kubernetes/machine.yaml
     kubectl delete -f kubernetes/machine-deployment.yaml

Support for a new provider

• Steps to be followed while implementing/testing a new provider are mentioned here