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Version: 0.9.0

Installation

This document describes how to install Function Mesh based on your application in Kubernetes.

Install Function Mesh​

This section describes how to install Function Mesh through the install.sh script or through the Helm.

Prerequisites​

Before installing Function Mesh, ensure to perform the following operations.

Install cert-manager​

By default, Function Mesh is enabled with the admission control webhook. Therefore, you need to prepare the relevant signed certificates. Secrets that contain signed certificates are named with the fixed name function-mesh-admission-webhook-server-cert, which is controlled by the Certificate CRD.

It is recommended to use cert-manager to manage these certificates and you can install the cert-manager as follows.

helm repo add jetstack https://charts.jetstack.io
helm repo update
helm install \
  cert-manager jetstack/cert-manager \
  --namespace cert-manager \
  --create-namespace \
  --version v1.8.0 \
  --set installCRDs=true

Install Function Mesh through install.sh script​

Note

The install.sh command is suitable for trying Function Mesh out. If you want to deploy Function Mesh in production or other mission-critical scenarios, it is recommended to install Function Mesh through Helm.

This example shows how to use the install.sh command to install Function Mesh on your laptop (Linux or Mac OS), including a local kind cluster, all the Custom Resource Definitions (CRDs), required service account configuration, and Function Mesh components.

curl -sSL https://github.com/streamnative/function-mesh/releases/download/v0.9.0/install.sh | bash

After executing the above command, you should be able to see the output indicating that the Function Mesh pod is up and running. For details, see verify installation.

Install Function Mesh through Helm​

This example shows how to install Function Mesh through Helm.

Note

For the use of kubectl commands, see kubectl command reference.

  1. Add the StreamNative Function Mesh repository.

    helm repo add function-mesh http://charts.functionmesh.io/
    helm repo update

  2. Install the Function Mesh Operator.

    1. Set some variables for convenient use later.

      export FUNCTION_MESH_RELEASE_NAME=function-mesh  # change the release name according to your scenario
      export FUNCTION_MESH_RELEASE_NAMESPACE=function-mesh  # change the namespace to where you want to install Function Mesh

    2. Install the Function Mesh Operator.

      Note

      • If no Kubernetes namespace is specified, the default namespace is used.
      • If the ${FUNCTION_MESH_RELEASE_NAMESPACE} namespace does not exist, you can create the Kubernetes cluster using the --create-namespace parameter.
      helm install ${FUNCTION_MESH_RELEASE_NAME} function-mesh/function-mesh-operator -n ${FUNCTION_MESH_RELEASE_NAMESPACE}

    There are some configurable parameters of the Function Mesh Operator. For details, see Function Mesh Operator configurations.

  3. Check whether Function Mesh is installed successfully.

    kubectl get pods -n ${FUNCTION_MESH_RELEASE_NAMESPACE} -l app.kubernetes.io/instance=function-mesh

    Output

    NAME                                               READY   STATUS    RESTARTS   AGE
    function-mesh-controller-manager-5f867557c-d6vf4   1/1     Running   0          8s

Verify installation​

  • This example shows how to verify whether Function Mesh is installed successfully.

    kubectl get pods -n ${FUNCTION_MESH_RELEASE_NAMESPACE} -l app.kubernetes.io/instance=function-mesh

    Output

    NAME                                               READY   STATUS    RESTARTS   AGE
    function-mesh-controller-manager-5f867557c-d6vf4   1/1     Running   0          8s

  • This example shows how to verify whether Function Mesh can run properly.

    After installing the Function Mesh Operator and deploying a Pulsar cluster, you can submit a sample CRD to create Pulsar Functions, source, sink, or Function Mesh. In this example, a CRD is submitted to the Pulsar cluster for creating a Pulsar Function. You can also submit other CRDs under the ./config/samples directory.

    1. Update your Pulsar cluster configurations in the CRD.

      # in config/samples/compute_v1alpha1_function.yaml
      ...
      apiVersion: v1
        kind: ConfigMap
        metadata:
        name: test-pulsar
        data:
          webServiceURL: http://<YOUR_PULSAR_URL>:8080
          brokerServiceURL: pulsar://<YOUR_PULSAR_URL>:6650
      ...

    2. Submit a sample CRD to the Pulsar cluster.

      kubectl apply -n ${FUNCTION_MESH_RELEASE_NAMESPACE} -f config/samples/compute_v1alpha1_function.yaml

    3. Verify your submission with the kubectl command, and you can see that the Function pod is running.

      kubectl get all
      NAME                                READY   STATUS      RESTARTS   AGE
      pod/function-sample-0               1/1     Running     0          77s

Uninstall Function Mesh​

  1. Use the following command to uninstall Function Mesh through Helm.

    helm delete function-mesh -n ${FUNCTION_MESH_RELEASE_NAMESPACE}

  2. Remove the Secrets that contain the signed certificates.

    Note

    If you do not clean up the Secrets, you might fail to install the Function Mesh Operator in this environment. For details about how to automatically clean up the corresponding Secrets when you delete a Certificate, see Cleaning up Secrets when Certificates are deleted.

    kubectl delete secret function-mesh-admission-webhook-server-cert -n ${FUNCTION_MESH_RELEASE_NAMESPACE}