98 lines
3.6 KiB
Go
98 lines
3.6 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 cmd
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import (
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"fmt"
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"net"
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netutil "k8s.io/apimachinery/pkg/util/net"
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kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
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kubeadmapiext "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1alpha1"
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kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
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kubeadmutil "k8s.io/kubernetes/cmd/kubeadm/app/util"
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tokenutil "k8s.io/kubernetes/cmd/kubeadm/app/util/token"
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"github.com/blang/semver"
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)
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var (
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minK8sVersion = semver.MustParse(kubeadmconstants.MinimumControlPlaneVersion)
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)
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func setInitDynamicDefaults(cfg *kubeadmapi.MasterConfiguration) error {
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// Choose the right address for the API Server to advertise. If the advertise address is localhost or 0.0.0.0, the default interface's IP address is used
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// This is the same logic as the API Server uses
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ip, err := netutil.ChooseBindAddress(net.ParseIP(cfg.API.AdvertiseAddress))
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if err != nil {
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return err
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}
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cfg.API.AdvertiseAddress = ip.String()
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// Validate version argument
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ver, err := kubeadmutil.KubernetesReleaseVersion(cfg.KubernetesVersion)
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if err != nil {
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if cfg.KubernetesVersion != kubeadmapiext.DefaultKubernetesVersion {
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return err
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} else {
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ver = kubeadmapiext.DefaultKubernetesFallbackVersion
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}
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}
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cfg.KubernetesVersion = ver
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// Omit the "v" in the beginning, otherwise semver will fail
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k8sVersion, err := semver.Parse(cfg.KubernetesVersion[1:])
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if err != nil {
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return fmt.Errorf("couldn't parse kubernetes version %q: %v", cfg.KubernetesVersion, err)
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}
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if k8sVersion.LT(minK8sVersion) {
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return fmt.Errorf("this version of kubeadm only supports deploying clusters with the control plane version >= v%s. Current version: %s", kubeadmconstants.MinimumControlPlaneVersion, cfg.KubernetesVersion)
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}
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fmt.Printf("[init] Using Kubernetes version: %s\n", cfg.KubernetesVersion)
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fmt.Printf("[init] Using Authorization mode: %s\n", cfg.AuthorizationMode)
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// Warn about the limitations with the current cloudprovider solution.
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if cfg.CloudProvider != "" {
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fmt.Println("[init] WARNING: For cloudprovider integrations to work --cloud-provider must be set for all kubelets in the cluster.")
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fmt.Println("\t(/etc/systemd/system/kubelet.service.d/10-kubeadm.conf should be edited for this purpose)")
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}
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// Validate token if any, otherwise generate
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if cfg.Discovery.Token != nil {
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if cfg.Discovery.Token.ID != "" && cfg.Discovery.Token.Secret != "" {
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fmt.Printf("[init] A token has been provided, validating [%s]\n", tokenutil.BearerToken(cfg.Discovery.Token))
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if valid, err := tokenutil.ValidateToken(cfg.Discovery.Token); valid == false {
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return err
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}
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} else {
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fmt.Println("[init] A token has not been provided, generating one")
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if err := tokenutil.GenerateToken(cfg.Discovery.Token); err != nil {
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return err
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}
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}
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// If there aren't any addresses specified, default to the first advertised address which can be user-provided or the default network interface's IP address
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if len(cfg.Discovery.Token.Addresses) == 0 {
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cfg.Discovery.Token.Addresses = []string{fmt.Sprintf("%s:%d", cfg.API.AdvertiseAddress, kubeadmapiext.DefaultDiscoveryBindPort)}
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}
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}
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return nil
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}
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