When I create a Kubernetes Load Balancer Service using the following specification:

{
    "apiVersion": "v1",
    "kind": "Service",
    "metadata": {
        "name": "a1"
    },
    "spec": {
        "selector": {
            "app": "a1"
        },
        "ports": [
            {
                "port": 80,
                "targetPort": 80,
                "name": "http"
            },
            {
                "port": 443,
                "targetPort": 443,
                "name": "https"
            }
        ],
        "type": "LoadBalancer"
    }
}

I have to wait between 1 and 2 minutes until I get an EXTERNAL_IP.

I thought of reserving static IPs before and assigning them on Service creation:

{
    "apiVersion": "v1",
    "kind": "Service",
    "metadata": {
        "name": "a1"
    },
    "spec": {
        "selector": {
            "app": "a1"
        },
        "ports": [
            {
                "port": 80,
                "targetPort": 80,
                "name": "http"
            },
            {
                "port": 443,
                "targetPort": 443,
                "name": "https"
            }
        ],
        "type": "LoadBalancer",
        "loadBalancerIP": "130.211.64.237"
    }
}

But I have the same delay 1 - 1.5 minutes:

$ kubectl get svc
NAME             CLUSTER_IP       EXTERNAL_IP      PORT(S)          SELECTOR             AGE
a1               10.127.248.248   130.211.64.237   80/TCP,443/TCP   app=a1               1m

Does anyone know why this delay happens and if there is a way to shorten it?