Install on Azure Kubernetes Service (AKS)
This guide walks you through the installation of the latest version of Knative using pre-built images.
You can find guides for other platforms here.
Before you begin
Knative requires a Kubernetes cluster v1.11 or newer.
kubectl v1.10 is also
required. This guide walks you through creating a cluster with the correct
specifications for Knative on Azure Kubernetes Service (AKS).
This guide assumes you are using bash in a Mac or Linux environment; some commands will need to be adjusted for use in a Windows environment.
Installing the Azure CLI
- If you already have
2.0.41or later installed, you can skip to the next section and install
az by following the instructions for your operating system. See the
full installation instructions
if yours isn’t listed below. You will need az cli version 2.0.37 or greater.
brew install azure-cli
- Add the azure-cli repo to your sources:
console echo "deb [arch=amd64] https://packages.microsoft.com/repos/azure-cli/ wheezy main" | \ sudo tee /etc/apt/sources.list.d/azure-cli.list
- Run the following commands to install the Azure CLI and its dependencies:
console sudo apt-key adv --keyserver packages.microsoft.com --recv-keys 52E16F86FEE04B979B07E28DB02C46DF417A0893 sudo apt-get install apt-transport-https sudo apt-get update && sudo apt-get install azure-cli
- If you already have
kubectl versionto check your client version. If you have
kubectlv1.10 installed, you can skip to the next section and create an AKS cluster
az aks install-cli
Now that we have all the tools, we need a Kubernetes cluster to install Knative.
Configure your Azure account
First let’s identify your Azure subscription and save it for use later.
az loginand follow the instructions in the command output to authorize
azto use your account
- List your Azure subscriptions:
bash az account list -o table
Create a Resource Group for AKS
To simplify the command lines for this walkthrough, we need to define a few environment variables. First determine which region you’d like to run AKS in, along with the resource group you’d like to use.
export LOCATION=eastus export RESOURCE_GROUP=knative-group export CLUSTER_NAME=knative-cluster
- Create a resource group with the az cli using the following command if you
are using a new resource group.
bash az group create --name $RESOURCE_GROUP --location $LOCATION
Create a Kubernetes cluster using AKS
Next we will create a managed Kubernetes cluster using AKS. To make sure the cluster is large enough to host all the Knative and Istio components, the recommended configuration for a cluster is:
- Kubernetes version 1.11 or later
- Three or more nodes
- Standard_DS3_v2 nodes
- RBAC enabled
- Enable AKS in your subscription, use the following command with the az cli:
bash az provider register -n Microsoft.ContainerServiceYou should also ensure that the
Microsoft.Networkproviders are registered in your subscription. If you need to enable them:
bash az provider register -n Microsoft.Compute az provider register -n Microsoft.Network
- Create the AKS cluster!
az aks create --resource-group $RESOURCE_GROUP \ --name $CLUSTER_NAME \ --generate-ssh-keys \ --kubernetes-version 1.11.5 \ --enable-rbac \ --node-vm-size Standard_DS3_v2
- Configure kubectl to use the new cluster.
az aks get-credentials --resource-group $RESOURCE_GROUP --name $CLUSTER_NAME --admin
- Verify your cluster is up and running
bash kubectl get nodes
Knative depends on Istio.
- Install Istio:
kubectl apply --filename https://github.com/knative/serving/releases/download/v0.4.0/istio-crds.yaml && \ kubectl apply --filename https://github.com/knative/serving/releases/download/v0.4.0/istio.yaml
Note: the resources (CRDs) defined in the
istio-crds.yamlfile are also
included in the
istio.yaml file, but they are pulled out so that the CRD
definitions are created first. If you see an error when creating resources
about an unknown type, run the second
kubectl apply command again.
- Label the default namespace with
kubectl label namespace default istio-injection=enabled
- Monitor the Istio components until all of the components show a
bash kubectl get pods --namespace istio-system
It will take a few minutes for all the components to be up and running; you can rerun the command to see the current status.
Note: Instead of rerunning the command, you can add
--watchto the above command to view the component’s status updates in real time. Use CTRL + C to exit watch mode.
The following commands install all available Knative components. To customize your Knative installation, see Performing a Custom Knative Installation.
- If you are upgrading from Knative 0.3.x: Update your domain and static IP
address to be associated with the LoadBalancer
knative-ingressgateway. Then run the following to clean up leftover resources:
kubectl delete svc knative-ingressgateway -n istio-system kubectl delete deploy knative-ingressgateway -n istio-system
If you have the Knative Eventing Sources component installed, you will also need to delete the following resource before upgrading:
kubectl delete statefulset/controller-manager -n knative-sources
While the deletion of this resource during the upgrade process will not prevent modifications to Eventing Source resources, those changes will not be completed until the upgrade process finishes.
- Run the
kubectl applycommand to install Knative and its dependencies:
bash kubectl apply --filename https://github.com/knative/serving/releases/download/v0.4.0/serving.yaml \ --filename https://github.com/knative/build/releases/download/v0.4.0/build.yaml \ --filename https://github.com/knative/eventing/releases/download/v0.4.0/release.yaml \ --filename https://github.com/knative/eventing-sources/releases/download/v0.4.0/release.yaml \ --filename https://github.com/knative/serving/releases/download/v0.4.0/monitoring.yaml \ --filename https://raw.githubusercontent.com/knative/serving/v0.4.0/third_party/config/build/clusterrole.yaml> Note: For the v0.4.0 release and newer, the
clusterrole.yamlfile is > required to enable the Build and Serving components to interact with each other.
- Monitor the Knative components until all of the components show a
bash kubectl get pods --namespace knative-serving kubectl get pods --namespace knative-build kubectl get pods --namespace knative-eventing kubectl get pods --namespace knative-sources kubectl get pods --namespace knative-monitoring
Now that your cluster has Knative installed, you can see what Knative has to offer.
To deploy your first app with Knative, follow the step-by-step Getting Started with Knative App Deployment guide.
To get started with Knative Eventing, pick one of the Eventing Samples to walk through.
To get started with Knative Build, read the Build README, then choose a sample to walk through.
Running a cluster costs money, so you might want to delete the cluster when you’re done if you’re not using it. Deleting the cluster will also remove Knative, Istio, and any apps you’ve deployed.
To delete the cluster, enter the following command:
az aks delete --resource-group $RESOURCE_GROUP --name $CLUSTER_NAME --yes --no-wait