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Setup using Release package

Prerequisites

  • Install docker

  • Install kubeadm/kubectl

  • Creating cluster with kubeadm

  • After initializing Kubernetes master, we need to expose insecure port 8080 for edgecontroller/kubectl to work with http connection to Kubernetes apiserver. Please follow below steps to enable http port in Kubernetes apiserver.

      vi /etc/kubernetes/manifests/kube-apiserver.yaml
  # Add the following flags in spec: containers: -command section
  - --insecure-port=8080
  - --insecure-bind-address=0.0.0.0

  • (Optional)KubeEdge also supports https connection to Kubernetes apiserver. Follow the steps in Kubernetes Documentation to create the kubeconfig file.

    Enter the path to kubeconfig file in controller.yaml

    controller:
  kube:
    ...
    kubeconfig: "path_to_kubeconfig_file" #Enter path to kubeconfig file to enable https connection to k8s apiserver

    Cloud Vm

    Note:execute the below commands as root user

    VERSION="v0.3.0"
OS="linux"
ARCH="amd64"
curl -L "https://github.com/kubeedge/kubeedge/releases/download/${VERSION}/kubeedge-${VERSION}-${OS}-${ARCH}.tar.gz" --output kubeedge-${VERSION}-${OS}-${ARCH}.tar.gz && tar -xf kubeedge-${VERSION}-${OS}-${ARCH}.tar.gz  -C /etc

    Generate Certificates

    RootCA certificate and a cert/key pair is required to have a setup for KubeEdge. Same cert/key pair can be used in both cloud and edge.

    wget -L https://github.com/kubeedge/kubeedge/blob/master/build/tools/certgen.sh
# make script executable
chmod +x certgen.sh
bash -x ./certgen.sh genCertAndKey edge

    NOTE: The cert/key will be generated in the /etc/kubeedge/ca and /etc/kubeedge/certs respectively.

    • The path to the generated certificates should be updated in etc/kubeedge/cloud/conf/controller.yaml. Please update the correct paths for the following :

      • cloudhub.ca
      • cloudhub.cert
      • cloudhub.key

    • Create device model and device CRDs.

        wget -L https://github.com/kubeedge/kubeedge/blob/master/build/crds/devices/devices_v1alpha1_devicemodel.yaml
    # make script executable
    chmod +x devices_v1alpha1_devicemodel.yaml
    kubectl create -f devices_v1alpha1_devicemodel.yaml
    wget -L https://github.com/kubeedge/kubeedge/blob/master/build/crds/devices/devices_v1alpha1_device.yaml
     # make script executable
    chmod +x devices_v1alpha1_device.yaml
    kubectl create -f devices_v1alpha1_device.yaml
    • Run cloud
        cd /etc/kubeedge/cloud
    # run edge controller
    # `conf/` should be in the same directory where edgecontroller resides
    # verify the configurations before running cloud(edgecontroller)
    ./edgecontroller

    Edge Vm

    Prerequisites

NOTE: scp kubeedge folder from cloud vm to edge vm

In cloud
scp -r /etc/kubeedge root@edgeip:/etc

Configuring MQTT mode

The Edge part of KubeEdge uses MQTT for communication between deviceTwin and devices. KubeEdge supports 3 MQTT modes:

  1. internalMqttMode: internal mqtt broker is enabled.
  2. bothMqttMode: internal as well as external broker are enabled.
  3. externalMqttMode: only external broker is enabled.

Use mode field in edge.yaml to select the desired mode.

To use KubeEdge in double mqtt or external mode, you need to make sure that mosquitto or emqx edge is installed on the edge node as an MQTT Broker.

  • We have provided a sample node.json to add a node in kubernetes. Please make sure edge-node is added in kubernetes. Run below steps to add edge-node.

  • Deploy node shell wget -L https://github.com/kubeedge/kubeedge/blob/master/build/node.json #Modify the node.json` file and change `metadata.name` to the name of the edge node kubectl apply -f node.json

  • Modify the /etc/kubeedge/edge/conf/edge.yaml configuration file

    • Replace edgehub.websocket.certfile and edgehub.websocket.keyfile with your own certificate path
    • Update the IP address of the master in the websocket.url field.
    • replace fb4ebb70-2783-42b8-b3ef-63e2fd6d242e with edge node name in edge.yaml for the below fields :
      • websocket:URL
      • controller:node-id
      • edged:hostname-override
    • Configure the desired container runtime in /etc/kubeedge/edge/conf/edge.yaml configuration file
    • Specify the runtime type to be used as either docker or remote (for all CRI based runtimes including containerd). If this parameter is not specified docker runtime will be used by default
      • runtime-type:docker or runtime-type:remote
    • Additionally specify the following parameters for remote/CRI based runtimes
      • remote-runtime-endpoint:/var/run/containerd/containerd.sock
      • remote-image-endpoint:/var/run/containerd/containerd.sock
      • runtime-request-timeout: 2
      • podsandbox-image: k8s.gcr.io/pause
      • kubelet-root-dir: /var/run/kubelet/

  • Run edge

    # run edge_core
        # `conf/` should be in the same directory as the cloned KubeEdge repository
        cd /etc/kubeedge/edge
        # verify the configurations before running edge(edge_core)
        ./edge_core
        # or
        nohup ./edge_core > edge_core.log 2>&1 &
       
**Note**: Running edge_core on ARM based processors,follow the above steps as mentioned for Edge Vm

    VERSION="v0.3.0"
    OS="linux"
    ARCH="arm"
    curl -L "https://github.com/kubeedge/kubeedge/releases/download/${VERSION}/kubeedge-${VERSION}-${OS}-${ARCH}.tar.gz" --output kubeedge-${VERSION}-${OS}-${ARCH}.tar.gz && tar -xf kubeedge-${VERSION}-${OS}-${ARCH}.tar.gz  -C /etc
  • Monitoring containers status
    • If the container runtime configured to manage containers is containerd , then the following commands can be used to inspect container status and list images.
      • sudo ctr --namespace k8s.io containers ls
      • sudo ctr --namespace k8s.io images ls
      • sudo crictl exec -ti /bin/bash