f558359315
When `API.ControlPlaneEndpoint` is used, the `BindPort` of the apiserver is currently assumed, which means a load balancer cannot listen on a different port than the apiserver. This extends the `ControlPlaneEndpoint` to take an optional port which may differ from the apiserver's `BindPort`.
86 lines
2.7 KiB
Go
86 lines
2.7 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package util
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import (
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"fmt"
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"net"
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"strconv"
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"strings"
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"k8s.io/apimachinery/pkg/util/validation"
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kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
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)
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// GetMasterEndpoint returns a properly formatted Master Endpoint
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// or passes the error from GetMasterHostPort.
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func GetMasterEndpoint(cfg *kubeadmapi.MasterConfiguration) (string, error) {
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hostPort, err := GetMasterHostPort(cfg)
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if err != nil {
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return "", err
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}
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return fmt.Sprintf("https://%s", hostPort), nil
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}
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// GetMasterHostPort returns a properly formatted Master hostname or IP and port pair, or error
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// if the hostname or IP address can not be parsed or port is outside the valid TCP range.
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func GetMasterHostPort(cfg *kubeadmapi.MasterConfiguration) (string, error) {
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var masterIP string
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var portStr string
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if len(cfg.API.ControlPlaneEndpoint) > 0 {
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if strings.Contains(cfg.API.ControlPlaneEndpoint, ":") {
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var err error
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masterIP, portStr, err = net.SplitHostPort(cfg.API.ControlPlaneEndpoint)
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if err != nil {
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return "", fmt.Errorf("invalid value `%s` given for `ControlPlaneEndpoint`: %s", cfg.API.ControlPlaneEndpoint, err)
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}
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} else {
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masterIP = cfg.API.ControlPlaneEndpoint
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}
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errs := validation.IsDNS1123Subdomain(masterIP)
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if len(errs) > 0 {
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return "", fmt.Errorf("error parsing `ControlPlaneEndpoint` to valid dns subdomain with errors: %s", errs)
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}
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} else {
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ip := net.ParseIP(cfg.API.AdvertiseAddress)
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if ip == nil {
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return "", fmt.Errorf("error parsing address %s", cfg.API.AdvertiseAddress)
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}
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masterIP = ip.String()
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}
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var port int32
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if len(portStr) > 0 {
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portInt, err := strconv.Atoi(portStr)
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if err != nil {
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return "", fmt.Errorf("error parsing `ControlPlaneEndpoint` port value `%s`: %s", portStr, err.Error())
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}
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port = int32(portInt)
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fmt.Println("[endpoint] WARNING: specifying a port for `ControlPlaneEndpoint` overrides `BindPort`")
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} else {
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port = cfg.API.BindPort
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}
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if port < 0 || port > 65535 {
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return "", fmt.Errorf("api server port must be between 0 and 65535, %d was given", port)
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}
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hostPort := net.JoinHostPort(masterIP, strconv.Itoa(int(port)))
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return hostPort, nil
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}
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