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minikube
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Make --wait=false wait for nothing again, change default to --wait=true

pull/5894/head
Thomas Stromberg 2019-11-12 13:38:48 -08:00
parent e611b38e60
commit dc3a50e026
4 changed files with 78 additions and 148 deletions
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20
cmd/minikube/cmd/start.go
View File

@ -170,7 +170,7 @@ func initMinikubeFlags() {
startCmd.Flags().String(criSocket, "", "The cri socket path to be used.")
startCmd.Flags().String(networkPlugin, "", "The name of the network plugin.")
startCmd.Flags().Bool(enableDefaultCNI, false, "Enable the default CNI plugin (/etc/cni/net.d/k8s.conf). Used in conjunction with \"--network-plugin=cni\".")
startCmd.Flags().Bool(waitUntilHealthy, false, "Wait until Kubernetes core services are healthy before exiting.")
startCmd.Flags().Bool(waitUntilHealthy, true, "Wait until apiserver API calls return content before exiting.")
startCmd.Flags().Duration(waitTimeout, 6*time.Minute, "max time to wait per Kubernetes core services to be healthy.")
startCmd.Flags().Bool(nativeSSH, true, "Use native Golang SSH client (default true). Set to 'false' to use the command line 'ssh' command when accessing the docker machine. Useful for the machine drivers when they will not start with 'Waiting for SSH'.")
startCmd.Flags().Bool(autoUpdate, true, "If set, automatically updates drivers to the latest version. Defaults to true.")
@ -365,7 +365,11 @@ func runStart(cmd *cobra.Command, args []string) {
if driverName == driver.None {
prepareNone()
}
waitCluster(bs, config)
if viper.GetBool(waitUntilHealthy) {
if err := bs.WaitForCluster(config.KubernetesConfig, viper.GetDuration(waitTimeout)); err != nil {
exit.WithError("Wait failed", err)
}
}
if err := showKubectlInfo(kubeconfig, k8sVersion, config.Name); err != nil {
glog.Errorf("kubectl info: %v", err)
}
@ -389,18 +393,6 @@ func enableAddons() {
}
}
func waitCluster(bs bootstrapper.Bootstrapper, config cfg.MachineConfig) {
var podsToWaitFor []string
if !viper.GetBool(waitUntilHealthy) {
// only wait for apiserver if wait=false
podsToWaitFor = []string{"apiserver"}
}
if err := bs.WaitForPods(config.KubernetesConfig, viper.GetDuration(waitTimeout), podsToWaitFor); err != nil {
exit.WithError("Wait failed", err)
}
}
func displayVersion(version string) {
prefix := ""
if viper.GetString(cfg.MachineProfile) != constants.DefaultMachineName {

2
pkg/minikube/bootstrapper/bootstrapper.go
View File

@ -41,7 +41,7 @@ type Bootstrapper interface {
UpdateCluster(config.KubernetesConfig) error
RestartCluster(config.KubernetesConfig) error
DeleteCluster(config.KubernetesConfig) error
WaitForPods(config.KubernetesConfig, time.Duration, []string) error
WaitForCluster(config.KubernetesConfig, time.Duration) error
// LogCommands returns a map of log type to a command which will display that log.
LogCommands(LogOptions) map[string]string
SetupCerts(cfg config.KubernetesConfig) error

203
pkg/minikube/bootstrapper/kubeadm/kubeadm.go
View File

@ -39,7 +39,6 @@ import (
"github.com/spf13/viper"
"golang.org/x/sync/errgroup"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/kubernetes"
kconst "k8s.io/kubernetes/cmd/kubeadm/app/constants"
@ -66,7 +65,6 @@ const (
defaultCNIConfigPath = "/etc/cni/net.d/k8s.conf"
kubeletServiceFile = "/lib/systemd/system/kubelet.service"
kubeletSystemdConfFile = "/etc/systemd/system/kubelet.service.d/10-kubeadm.conf"
AllPods = "ALL_PODS"
)
const (
@ -96,22 +94,6 @@ var KubeadmExtraArgsWhitelist = map[int][]string{
},
}
type pod struct {
// Human friendly name
name string
key string
value string
}
// PodsByLayer are queries we run when health checking, sorted roughly by dependency layer
var PodsByLayer = []pod{
{"proxy", "k8s-app", "kube-proxy"},
{"etcd", "component", "etcd"},
{"scheduler", "component", "kube-scheduler"},
{"controller", "component", "kube-controller-manager"},
{"dns", "k8s-app", "kube-dns"},
}
// yamlConfigPath is the path to the kubeadm configuration
var yamlConfigPath = path.Join(vmpath.GuestEphemeralDir, "kubeadm.yaml")
@ -354,7 +336,6 @@ func addAddons(files *[]assets.CopyableFile, data interface{}) error {
// client returns a Kubernetes client to use to speak to a kubeadm launched apiserver
func (k *Bootstrapper) client(k8s config.KubernetesConfig) (*kubernetes.Clientset, error) {
// Catch case if WaitForPods was called with a stale ~/.kube/config
config, err := kapi.ClientConfig(k.contextName)
if err != nil {
return nil, errors.Wrap(err, "client config")
@ -369,69 +350,71 @@ func (k *Bootstrapper) client(k8s config.KubernetesConfig) (*kubernetes.Clientse
return kubernetes.NewForConfig(config)
}
// WaitForPods blocks until pods specified in podsToWaitFor appear to be healthy.
func (k *Bootstrapper) WaitForPods(k8s config.KubernetesConfig, timeout time.Duration, podsToWaitFor []string) error {
// Do not wait for "k8s-app" pods in the case of CNI, as they are managed
// by a CNI plugin which is usually started after minikube has been brought
// up. Otherwise, minikube won't start, as "k8s-app" pods are not ready.
componentsOnly := k8s.NetworkPlugin == "cni"
out.T(out.WaitingPods, "Waiting for:")
// WaitForCluster blocks until the cluster appears to be healthy
func (k *Bootstrapper) WaitForCluster(k8s config.KubernetesConfig, timeout time.Duration) error {
start := time.Now()
out.T(out.Waiting, "Waiting for cluster to come online ...")
// Wait until the apiserver can answer queries properly. We don't care if the apiserver
// pod shows up as registered, but need the webserver for all subsequent queries.
if shouldWaitForPod("apiserver", podsToWaitFor) {
out.String(" apiserver")
if err := k.waitForAPIServer(k8s); err != nil {
return errors.Wrap(err, "waiting for apiserver")
glog.Infof("waiting for apiserver process to appear ...")
err := wait.PollImmediate(time.Second*1, time.Minute*5, func() (bool, error) {
if time.Since(start) > timeout {
return false, fmt.Errorf("cluster wait timed out during process check")
}
}
client, err := k.client(k8s)
rr, ierr := k.c.RunCmd(exec.Command("sudo", "pgrep", "kube-apiserver"))
if ierr != nil {
glog.Warningf("pgrep apiserver: %v cmd: %s", ierr, rr.Command())
return false, nil
}
return true, nil
})
if err != nil {
return errors.Wrap(err, "client")
return fmt.Errorf("apiserver process never appeared")
}
glog.Infof("duration metric: took %s to wait for apiserver process to appear ...", time.Since(start))
glog.Infof("waiting for apiserver healthz status ...")
hStart := time.Now()
healthz := func() (bool, error) {
if time.Since(start) > timeout {
return false, fmt.Errorf("cluster wait timed out during healthz check")
}
status, err := k.GetAPIServerStatus(net.ParseIP(k8s.NodeIP), k8s.NodePort)
if err != nil {
glog.Warningf("status: %v", err)
return false, nil
}
if status != "Running" {
return false, nil
}
return true, nil
}
for _, p := range PodsByLayer {
if componentsOnly && p.key != "component" { // skip component check if network plugin is cni
continue
}
if !shouldWaitForPod(p.name, podsToWaitFor) {
continue
}
out.String(" %s", p.name)
selector := labels.SelectorFromSet(labels.Set(map[string]string{p.key: p.value}))
if err := kapi.WaitForPodsWithLabelRunning(client, "kube-system", selector, timeout); err != nil {
return errors.Wrap(err, fmt.Sprintf("waiting for %s=%s", p.key, p.value))
}
if err = wait.PollImmediate(kconst.APICallRetryInterval, kconst.DefaultControlPlaneTimeout, healthz); err != nil {
return fmt.Errorf("apiserver healthz never reported healthy")
}
out.Ln("")
glog.Infof("duration metric: took %s to wait for apiserver healthz status ...", time.Since(hStart))
glog.Infof("waiting for apiserver to appear in pod list ...")
pStart := time.Now()
client, err := k.client(k8s)
podList := func() (bool, error) {
if time.Since(start) > timeout {
return false, fmt.Errorf("cluster wait timed out during pod check")
}
_, err := client.CoreV1().Pods("kube-system").Get("kube-apiserver-minikube", metav1.GetOptions{})
if err != nil {
return false, nil
}
return true, nil
}
if err = wait.PollImmediate(kconst.APICallRetryInterval, kconst.DefaultControlPlaneTimeout, podList); err != nil {
return fmt.Errorf("apiserver never returned a pod list")
}
glog.Infof("duration metric: took %s to wait for pod list to return data ...", time.Since(pStart))
return nil
}
// shouldWaitForPod returns true if:
// 1. podsToWaitFor is nil
// 2. name is in podsToWaitFor
// 3. ALL_PODS is in podsToWaitFor
// else, return false
func shouldWaitForPod(name string, podsToWaitFor []string) bool {
if podsToWaitFor == nil {
return true
}
if len(podsToWaitFor) == 0 {
return false
}
for _, p := range podsToWaitFor {
if p == AllPods {
return true
}
if p == name {
return true
}
}
return false
}
// RestartCluster restarts the Kubernetes cluster configured by kubeadm
func (k *Bootstrapper) RestartCluster(k8s config.KubernetesConfig) error {
glog.Infof("RestartCluster start")
@ -472,8 +455,21 @@ func (k *Bootstrapper) RestartCluster(k8s config.KubernetesConfig) error {
}
}
if err := k.waitForAPIServer(k8s); err != nil {
return errors.Wrap(err, "waiting for apiserver")
// We must ensure that the apiserver is healthy before proceeding
glog.Infof("waiting for apiserver healthz ...")
healthz := func() (bool, error) {
status, err := k.GetAPIServerStatus(net.ParseIP(k8s.NodeIP), k8s.NodePort)
if err != nil {
glog.Warningf("status: %v", err)
return false, nil
}
if status != "Running" {
return false, nil
}
return true, nil
}
if err = wait.PollImmediate(kconst.APICallRetryInterval, kconst.DefaultControlPlaneTimeout, healthz); err != nil {
return fmt.Errorf("apiserver healthz never reported healthy")
}
// restart the proxy and coredns
@ -487,63 +483,6 @@ func (k *Bootstrapper) RestartCluster(k8s config.KubernetesConfig) error {
return nil
}
// waitForAPIServer waits for the apiserver to start up
func (k *Bootstrapper) waitForAPIServer(k8s config.KubernetesConfig) error {
start := time.Now()
defer func() {
glog.Infof("duration metric: took %s to wait for apiserver status ...", time.Since(start))
}()
glog.Infof("Waiting for apiserver process ...")
// To give a better error message, first check for process existence via ssh
// Needs minutes in case the image isn't cached (such as with v1.10.x)
err := wait.PollImmediate(time.Millisecond*300, time.Minute*3, func() (bool, error) {
rr, ierr := k.c.RunCmd(exec.Command("sudo", "pgrep", "kube-apiserver"))
if ierr != nil {
glog.Warningf("pgrep apiserver: %v cmd: %s", ierr, rr.Command())
return false, nil
}
return true, nil
})
if err != nil {
return fmt.Errorf("apiserver process never appeared")
}
glog.Infof("Waiting for apiserver to port healthy status ...")
var client *kubernetes.Clientset
f := func() (bool, error) {
status, err := k.GetAPIServerStatus(net.ParseIP(k8s.NodeIP), k8s.NodePort)
glog.Infof("apiserver status: %s, err: %v", status, err)
if err != nil {
glog.Warningf("status: %v", err)
return false, nil
}
if status != "Running" {
return false, nil
}
// Make sure apiserver pod is retrievable
if client == nil {
// We only want to get the clientset once, because this line takes ~1 second to complete
client, err = k.client(k8s)
if err != nil {
glog.Warningf("get kubernetes client: %v", err)
return false, nil
}
}
_, err = client.CoreV1().Pods("kube-system").Get("kube-apiserver-minikube", metav1.GetOptions{})
if err != nil {
return false, nil
}
return true, nil
// TODO: Check apiserver/kubelet logs for fatal errors so that users don't
// need to wait minutes to find out their flag didn't work.
}
err = wait.PollImmediate(kconst.APICallRetryInterval, 2*kconst.DefaultControlPlaneTimeout, f)
return err
}
// DeleteCluster removes the components that were started earlier
func (k *Bootstrapper) DeleteCluster(k8s config.KubernetesConfig) error {
version, err := parseKubernetesVersion(k8s.KubernetesVersion)

1
pkg/minikube/out/style.go
View File

@ -65,7 +65,6 @@ var styles = map[StyleEnum]style{
Stopped: {Prefix: "🛑 "},
WarningType: {Prefix: "⚠️ ", LowPrefix: lowWarning},
Waiting: {Prefix: "⌛ "},
WaitingPods: {Prefix: "⌛ ", OmitNewline: true},
Usage: {Prefix: "💡 "},
Launch: {Prefix: "🚀 "},
Sad: {Prefix: "😿 "},