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Merge pull request #40149 from luxas/followup_rbac
Automatic merge from submit-queue (batch tested with PRs 39772, 39831, 39481, 40167, 40149) Only enable RBAC if the k8s version is above 1.6.0-alpha.0 ...and move the defaulting of the api type into a specific file **What this PR does / why we need it**: RBAC should only be enabled when k8s version is v1.6.0-alpha.0+, where https://github.com/kubernetes/kubernetes/pull/39625 is merged **Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes # **Special notes for your reviewer**: ``` $ sudo ./kubeadm init [kubeadm] WARNING: kubeadm is in alpha, please do not use it for production clusters. [init] Using Kubernetes version: v1.5.2 [init] Using Authorization mode: AlwaysAllow [init] A token has not been provided, generating one [preflight] Running pre-flight checks [preflight] WARNING: kubelet service is not enabled, please run 'systemctl enable kubelet.service' [preflight] Starting the kubelet service [certificates] Generated Certificate Authority key and certificate. [certificates] Generated API Server key and certificate [certificates] Generated Service Account signing keys [certificates] Created keys and certificates in "/etc/kubernetes/pki" [kubeconfig] Wrote KubeConfig file to disk: "/etc/kubernetes/admin.conf" [kubeconfig] Wrote KubeConfig file to disk: "/etc/kubernetes/kubelet.conf" [apiclient] Created API client, waiting for the control plane to become ready [apiclient] All control plane components are healthy after 39.517396 seconds [apiclient] Waiting for at least one node to register and become ready [apiclient] First node is ready after 6.521587 seconds [apiclient] Creating a test deployment [apiclient] Test deployment succeeded [token-discovery] Using token: 6c3430:2889e46ce3f11610 [token-discovery] Created the kube-discovery deployment, waiting for it to become ready [token-discovery] kube-discovery is ready after 3.502025 seconds [addons] Created essential addon: kube-proxy [addons] Created essential addon: kube-dns Your Kubernetes master has initialized successfully! You should now deploy a pod network to the cluster. Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at: http://kubernetes.io/docs/admin/addons/ You can now join any number of machines by running the following on each node: kubeadm join --discovery token://6c3430:2889e46ce3f11610@192.168.200.101:9898 ``` ``` $ cat fetch-ci-images.sh #!/bin/bash CI_COMMIT=${CI_COMMIT:-latest} ARCH=${ARCH:-amd64} OLD_REGISTRY=${OLD_REGISTRY:-gcr.io/google_containers} NEW_REGISTRY=${NEW_REGISTRY:-${OLD_REGISTRY}} if [[ ${CI_COMMIT} == "latest" ]]; then CI_COMMIT=$(curl -sSL https://storage.googleapis.com/kubernetes-release-dev/ci-cross/latest.txt) fi CI_COMMIT_TAG=$(echo ${CI_COMMIT} | sed "s/+/-/") echo "Using commit: ${CI_COMMIT}" echo "Tagging to registry: ${NEW_REGISTRY}" images=( kube-apiserver kube-scheduler kube-controller-manager kube-proxy ) for image in ${images[@]}; do curl -sSL https://storage.googleapis.com/kubernetes-release-dev/ci-cross/${CI_COMMIT}/bin/linux/${ARCH}/${image}.tar | docker load image_tag=$(curl -sSL https://storage.googleapis.com/kubernetes-release-dev/ci-cross/${CI_COMMIT}/bin/linux/${ARCH}/${image}.md5) docker tag ${OLD_REGISTRY}/${image}:${image_tag} ${NEW_REGISTRY}/${image}-${ARCH}:${CI_COMMIT_TAG} docker rmi ${OLD_REGISTRY}/${image}:${image_tag} echo "Image created: ${NEW_REGISTRY}/${image}-${ARCH}:${CI_COMMIT_TAG}" done cat <<EOF Now you can run: kubeadm init --use-kubernetes-version ${CI_COMMIT_TAG} EOF $ ./fetch-ci-images.sh Using commit: v1.6.0-alpha.0.3549+5e4625cad72e5b Tagging to registry: gcr.io/google_containers c366cffde3c9: Loading layer 1.312 MB/1.312 MB 1911ea24d99d: Loading layer 1.024 kB/1.024 kB 3af1ee6d3b81: Loading layer 132.9 MB/132.9 MB Untagged: gcr.io/google_containers/kube-apiserver:8562727e1eabe97a95bc2e52992db195 Image created: gcr.io/google_containers/kube-apiserver-amd64:v1.6.0-alpha.0.3549-5e4625cad72e5b c366cffde3c9: Loading layer 1.312 MB/1.312 MB 1911ea24d99d: Loading layer 1.024 kB/1.024 kB 86bf938b66e2: Loading layer 54.88 MB/54.88 MB Untagged: gcr.io/google_containers/kube-scheduler:5319acbc670b5050f119e6f6e3c9b7e3 Image created: gcr.io/google_containers/kube-scheduler-amd64:v1.6.0-alpha.0.3549-5e4625cad72e5b c366cffde3c9: Loading layer 1.312 MB/1.312 MB 1911ea24d99d: Loading layer 1.024 kB/1.024 kB 6743a986e1ed: Loading layer 104.9 MB/104.9 MB Untagged: gcr.io/google_containers/kube-controller-manager:6698cef6338d549160d58fd8381f3d07 Image created: gcr.io/google_containers/kube-controller-manager-amd64:v1.6.0-alpha.0.3549-5e4625cad72e5b bf028f50c346: Loading layer 128.9 MB/128.9 MB a99e621f3f37: Loading layer 1.024 kB/1.024 kB 76d4fdcd51a9: Loading layer 5.076 MB/5.076 MB ee455b365369: Loading layer 42.52 MB/42.52 MB Untagged: gcr.io/google_containers/kube-proxy:3914060ffe3225ae29fe88cb960826f9 Image created: gcr.io/google_containers/kube-proxy-amd64:v1.6.0-alpha.0.3549-5e4625cad72e5b Now you can run: kubeadm init --use-kubernetes-version v1.6.0-alpha.0.3549-5e4625cad72e5b ``` ``` $ sudo ./kubeadm init --use-kubernetes-version v1.6.0-alpha.0.3549-5e4625cad72e5b [kubeadm] WARNING: kubeadm is in alpha, please do not use it for production clusters. [init] Using Kubernetes version: v1.6.0-alpha.0.3549-5e4625cad72e5b [init] Using Authorization mode: RBAC [init] A token has not been provided, generating one [preflight] Running pre-flight checks [preflight] WARNING: kubelet service is not enabled, please run 'systemctl enable kubelet.service' [preflight] Starting the kubelet service [certificates] Generated Certificate Authority key and certificate. [certificates] Generated API Server key and certificate [certificates] Generated Service Account signing keys [certificates] Created keys and certificates in "/etc/kubernetes/pki" [kubeconfig] Wrote KubeConfig file to disk: "/etc/kubernetes/admin.conf" [kubeconfig] Wrote KubeConfig file to disk: "/etc/kubernetes/kubelet.conf" [apiclient] Created API client, waiting for the control plane to become ready [apiclient] All control plane components are healthy after 31.252686 seconds [apiclient] Waiting for at least one node to register and become ready [apiclient] First node is ready after 9.064842 seconds [apiclient] Creating a test deployment [apiclient] Test deployment succeeded [apiconfig] Created kubelet-bootstrap RBAC rules [apiconfig] Created kube-dns RBAC rules [apiconfig] Created kube-proxy RBAC rules [token-discovery] Using token: 99b957:ccb1fbc703a0db8a [token-discovery] Created the kube-discovery deployment, waiting for it to become ready [token-discovery] kube-discovery is ready after 3.502064 seconds [addons] Created essential addon: kube-proxy [addons] Created essential addon: kube-dns Your Kubernetes master has initialized successfully! You should now deploy a pod network to the cluster. Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at: http://kubernetes.io/docs/admin/addons/ You can now join any number of machines by running the following on each node: kubeadm join --discovery token://99b957:ccb1fbc703a0db8a@192.168.200.101:9898 ``` **Release note**: ```release-note NONE ``` @pires @mikedanese @andrewrynhard
This commit is contained in:
Kubernetes Submit Queue
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commit
7392f562e8
@ -19,13 +19,15 @@ package v1alpha1
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import "k8s.io/apimachinery/pkg/runtime"
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const (
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DefaultServiceDNSDomain = "cluster.local"
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DefaultServicesSubnet = "10.96.0.0/12"
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DefaultKubernetesVersion = "stable"
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DefaultKubernetesFallbackVersion = "v1.5.0"
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DefaultServiceDNSDomain = "cluster.local"
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DefaultServicesSubnet = "10.96.0.0/12"
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DefaultKubernetesVersion = "stable"
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// This is only for clusters without internet, were the latest stable version can't be determined
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DefaultKubernetesFallbackVersion = "v1.5.2"
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DefaultAPIBindPort = 6443
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DefaultDiscoveryBindPort = 9898
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DefaultAuthorizationMode = "RBAC"
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// TODO: Default this to RBAC when DefaultKubernetesFallbackVersion is v1.6-something
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DefaultAuthorizationMode = "AlwaysAllow"
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)
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func addDefaultingFuncs(scheme *runtime.Scheme) error {
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@ -12,6 +12,7 @@ go_library(
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name = "go_default_library",
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srcs = [
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"cmd.go",
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"defaults.go",
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"init.go",
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"join.go",
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"reset.go",
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@ -39,6 +40,7 @@ go_library(
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"//pkg/util/flag:go_default_library",
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"//pkg/util/initsystem:go_default_library",
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"//pkg/version:go_default_library",
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"//vendor:github.com/blang/semver",
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"//vendor:github.com/renstrom/dedent",
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"//vendor:github.com/spf13/cobra",
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"//vendor:k8s.io/apimachinery/pkg/fields",
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94
cmd/kubeadm/app/cmd/defaults.go
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94
cmd/kubeadm/app/cmd/defaults.go
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@ -0,0 +1,94 @@
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/*
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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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"strconv"
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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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kubeadmutil "k8s.io/kubernetes/cmd/kubeadm/app/util"
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"github.com/blang/semver"
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)
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var (
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// Maximum version when using AllowAll as the default authz mode. Everything above this will use RBAC by default.
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allowAllMaxVersion = semver.MustParse("1.6.0-alpha.0")
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)
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func setInitDynamicDefaults(cfg *kubeadmapi.MasterConfiguration) error {
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// Auto-detect the IP
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if len(cfg.API.AdvertiseAddresses) == 0 {
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ip, err := netutil.ChooseHostInterface()
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if err != nil {
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return err
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}
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cfg.API.AdvertiseAddresses = []string{ip.String()}
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}
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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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fmt.Println("[init] Using Kubernetes version:", ver)
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// Omit the "v" in the beginning, otherwise semver will fail
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// If the version is newer than the specified version, RBAC v1beta1 support is enabled in the apiserver so we can default to RBAC
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k8sVersion, err := semver.Parse(cfg.KubernetesVersion[1:])
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if k8sVersion.GT(allowAllMaxVersion) {
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cfg.AuthorizationMode = "RBAC"
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}
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fmt.Println("[init] Using Authorization mode:", 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", kubeadmutil.BearerToken(cfg.Discovery.Token))
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if valid, err := kubeadmutil.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 := kubeadmutil.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{cfg.API.AdvertiseAddresses[0] + ":" + strconv.Itoa(kubeadmapiext.DefaultDiscoveryBindPort)}
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}
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}
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return nil
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}
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@ -21,7 +21,6 @@ import (
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"io"
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"io/ioutil"
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"path"
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"strconv"
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"github.com/renstrom/dedent"
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"github.com/spf13/cobra"
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@ -38,7 +37,7 @@ import (
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kubeconfigphase "k8s.io/kubernetes/cmd/kubeadm/app/phases/kubeconfig"
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"k8s.io/apimachinery/pkg/runtime"
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netutil "k8s.io/apimachinery/pkg/util/net"
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"k8s.io/kubernetes/cmd/kubeadm/app/preflight"
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kubeadmutil "k8s.io/kubernetes/cmd/kubeadm/app/util"
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"k8s.io/kubernetes/pkg/api"
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@ -145,13 +144,10 @@ func NewInit(cfgPath string, cfg *kubeadmapi.MasterConfiguration, skipPreFlight
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}
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}
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// Auto-detect the IP
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if len(cfg.API.AdvertiseAddresses) == 0 {
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ip, err := netutil.ChooseHostInterface()
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if err != nil {
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return nil, err
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}
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cfg.API.AdvertiseAddresses = []string{ip.String()}
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// Set defaults dynamically that the API group defaulting can't (by fetching information from the internet, looking up network interfaces, etc.)
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err := setInitDynamicDefaults(cfg)
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if err != nil {
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return nil, err
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}
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if !skipPreFlight {
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@ -173,25 +169,6 @@ func NewInit(cfgPath string, cfg *kubeadmapi.MasterConfiguration, skipPreFlight
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// Try to start the kubelet service in case it's inactive
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preflight.TryStartKubelet()
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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 nil, 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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fmt.Println("[init] Using Kubernetes version:", ver)
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fmt.Println("[init] Using Authorization mode:", 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("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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return &Init{cfg: cfg}, nil
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}
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@ -202,34 +179,6 @@ func (i *Init) Validate() error {
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// Run executes master node provisioning, including certificates, needed static pod manifests, etc.
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func (i *Init) Run(out io.Writer) error {
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// Validate token if any, otherwise generate
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if i.cfg.Discovery.Token != nil {
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if i.cfg.Discovery.Token.ID != "" && i.cfg.Discovery.Token.Secret != "" {
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fmt.Printf("[token-discovery] A token has been provided, validating [%s]\n", kubeadmutil.BearerToken(i.cfg.Discovery.Token))
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if valid, err := kubeadmutil.ValidateToken(i.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("[token-discovery] A token has not been provided, generating one")
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if err := kubeadmutil.GenerateToken(i.cfg.Discovery.Token); err != nil {
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return err
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}
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}
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// Make sure there is at least one address
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if len(i.cfg.Discovery.Token.Addresses) == 0 {
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ip, err := netutil.ChooseHostInterface()
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if err != nil {
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return err
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}
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i.cfg.Discovery.Token.Addresses = []string{ip.String() + ":" + strconv.Itoa(kubeadmapiext.DefaultDiscoveryBindPort)}
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}
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if err := kubemaster.CreateTokenAuthFile(kubeadmutil.BearerToken(i.cfg.Discovery.Token)); err != nil {
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return err
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}
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}
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// PHASE 1: Generate certificates
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caCert, err := certphase.CreatePKIAssets(i.cfg, kubeadmapi.GlobalEnvParams.HostPKIPath)
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if err != nil {
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@ -247,6 +196,14 @@ func (i *Init) Run(out io.Writer) error {
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return err
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}
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// TODO: It's not great to have an exception for token here, but necessary because the apiserver doesn't handle this properly in the API yet
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// but relies on files on disk for now, which is daunting.
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if i.cfg.Discovery.Token != nil {
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if err := kubemaster.CreateTokenAuthFile(kubeadmutil.BearerToken(i.cfg.Discovery.Token)); err != nil {
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return err
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}
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}
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// Phase 3: Bootstrap the control plane
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if err := kubemaster.WriteStaticPodManifests(i.cfg); err != nil {
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return err
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