To update a virtual node

The following update-virtual-node example uses a JSON input file to add a health check to a virtual node.

aws appmesh update-virtual-node \
    --cli-input-json file://update-virtual-node.json

Contents of update-virtual-node.json:

{
    "clientToken": "500",
    "meshName": "app1",
    "spec": {
        "listeners": [
            {
                "healthCheck": {
                    "healthyThreshold": 5,
                    "intervalMillis": 10000,
                    "path": "/",
                    "port": 80,
                    "protocol": "http",
                    "timeoutMillis": 3000,
                    "unhealthyThreshold": 3
                },
                "portMapping": {
                    "port": 80,
                    "protocol": "http"
                }
            }
        ],
        "serviceDiscovery": {
            "dns": {
                "hostname": "serviceBv1.svc.cluster.local"
            }
        }
    },
    "virtualNodeName": "vnServiceBv1"
}

Output:

{
    "virtualNode": {
        "meshName": "app1",
        "metadata": {
            "arn": "arn:aws:appmesh:us-east-1:123456789012:mesh/app1/virtualNode/vnServiceBv1",
            "createdAt": 1563810019.874,
            "lastUpdatedAt": 1563819234.825,
            "uid": "a1b2c3d4-5678-90ab-cdef-11111EXAMPLE",
            "version": 2
        },
        "spec": {
            "listeners": [
                {
                    "healthCheck": {
                        "healthyThreshold": 5,
                        "intervalMillis": 10000,
                        "path": "/",
                        "port": 80,
                        "protocol": "http",
                        "timeoutMillis": 3000,
                        "unhealthyThreshold": 3
                    },
                    "portMapping": {
                        "port": 80,
                        "protocol": "http"
                    }
                }
            ],
            "serviceDiscovery": {
                "dns": {
                    "hostname": "serviceBv1.svc.cluster.local"
                }
            }
        },
        "status": {
            "status": "ACTIVE"
        },
        "virtualNodeName": "vnServiceBv1"
    }
}

For more information, see Virtual Nodes in the AWS App Mesh User Guide.