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create_cluster_minikube.go
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create_cluster_minikube.go
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package cmd
import (
"bytes"
"io"
"os"
"os/exec"
"runtime"
"strings"
"time"
"fmt"
"github.com/jenkins-x/jx/pkg/jx/cmd/templates"
"github.com/jenkins-x/jx/pkg/log"
"github.com/jenkins-x/jx/pkg/util"
"github.com/spf13/cobra"
"gopkg.in/AlecAivazis/survey.v1"
"gopkg.in/AlecAivazis/survey.v1/terminal"
)
// CreateClusterOptions the flags for running create cluster
type CreateClusterMinikubeOptions struct {
CreateClusterOptions
Flags CreateClusterMinikubeFlags
Provider KubernetesProvider
}
type CreateClusterMinikubeFlags struct {
Memory string
CPU string
DiskSize string
Driver string
HyperVVirtualSwitch string
Namespace string
ClusterVersion string
}
var (
createClusterMinikubeLong = templates.LongDesc(`
This command creates a new Kubernetes cluster, installing required local dependencies and provisions the
Jenkins X platform
Minikube is a tool that makes it easy to run Kubernetes locally. Minikube runs a single-node Kubernetes
cluster inside a VM on your laptop for users looking to try out Kubernetes or develop with it day-to-day.
`)
createClusterMinikubeExample = templates.Examples(`
jx create cluster minikube
`)
)
// NewCmdGet creates a command object for the generic "init" action, which
// installs the dependencies required to run the jenkins-x platform on a Kubernetes cluster.
func NewCmdCreateClusterMinikube(f Factory, in terminal.FileReader, out terminal.FileWriter, errOut io.Writer) *cobra.Command {
options := CreateClusterMinikubeOptions{
CreateClusterOptions: createCreateClusterOptions(f, in, out, errOut, MINIKUBE),
}
cmd := &cobra.Command{
Use: "minikube",
Short: "Create a new Kubernetes cluster with Minikube: Runs locally",
Long: createClusterMinikubeLong,
Example: createClusterMinikubeExample,
Run: func(cmd *cobra.Command, args []string) {
options.Cmd = cmd
options.Args = args
err := options.Run()
CheckErr(err)
},
}
options.addCreateClusterFlags(cmd)
options.addCommonFlags(cmd)
cmd.Flags().StringVarP(&options.Flags.Memory, "memory", "m", "", fmt.Sprintf("Amount of RAM allocated to the Minikube VM in MB. Defaults to %s MB.", MinikubeDefaultMemory))
cmd.Flags().StringVarP(&options.Flags.CPU, "cpu", "c", "", fmt.Sprintf("Number of CPUs allocated to the Minikube VM. Defaults to %s.", MinikubeDefaultCpu))
cmd.Flags().StringVarP(&options.Flags.DiskSize, "disk-size", "s", "", fmt.Sprintf("Total amount of storage allocated to the Minikube VM. Defaults to %s", MinikubeDefaultDiskSize))
cmd.Flags().StringVarP(&options.Flags.Driver, "vm-driver", "d", "", "VM driver is one of: [hyperkit hyperv kvm kvm2 virtualbox vmwarefusion xhyve]")
cmd.Flags().StringVarP(&options.Flags.HyperVVirtualSwitch, "hyperv-virtual-switch", "v", "", "Additional options for using HyperV with Minikube")
cmd.Flags().StringVarP(&options.Flags.ClusterVersion, optionKubernetesVersion, "", "", "Kubernetes version")
return cmd
}
func (o *CreateClusterMinikubeOptions) Run() error {
var deps []string
d := binaryShouldBeInstalled("minikube")
if d != "" {
deps = append(deps, d)
}
err := o.installMissingDependencies(deps)
if err != nil {
log.Errorf("error installing missing dependencies %v, please fix or install manually then try again", err)
os.Exit(-1)
}
if o.isExistingMinikubeRunning() {
log.Error("an existing Minikube cluster is already running, perhaps use `jx install`.\nNote existing Minikube must have RBAC enabled, running `minikube delete` and `jx create cluster minikube` creates a new VM with RBAC enabled")
os.Exit(-1)
}
err = o.createClusterMinikube()
if err != nil {
log.Errorf("error creating cluster %v", err)
os.Exit(-1)
}
return nil
}
func (o *CreateClusterMinikubeOptions) defaultMacVMDriver() string {
_, err := o.getCommandOutput("", "hyperkit", "-v")
if err != nil {
log.Warnf("Could not find hyperkit on your PATH. If you install Docker for Mac then we could use hyperkit.\nSee: https://docs.docker.com/docker-for-mac/install/\n")
return "xhyve"
}
return "hyperkit"
}
func (o *CreateClusterMinikubeOptions) isExistingMinikubeRunning() bool {
var cmd_out bytes.Buffer
e := exec.Command("minikube", "status")
e.Stdout = &cmd_out
e.Stderr = o.Err
err := e.Run()
if err != nil {
return false
}
if strings.Contains(cmd_out.String(), "Running") {
return true
}
return false
}
func (o *CreateClusterMinikubeOptions) createClusterMinikube() error {
mem := o.Flags.Memory
prompt := &survey.Input{
Message: "memory (MB)",
Default: MinikubeDefaultMemory,
Help: "Amount of RAM allocated to the Minikube VM in MB",
}
showPromptIfOptionNotSet(&mem, prompt, o.In, o.Out, o.Err)
cpu := o.Flags.CPU
prompt = &survey.Input{
Message: "cpu (cores)",
Default: MinikubeDefaultCpu,
Help: "Number of CPUs allocated to the Minikube VM",
}
showPromptIfOptionNotSet(&cpu, prompt, o.In, o.Out, o.Err)
disksize := o.Flags.DiskSize
prompt = &survey.Input{
Message: "disk-size (MB)",
Default: MinikubeDefaultDiskSize,
Help: "Total amount of storage allocated to the Minikube VM in MB",
}
showPromptIfOptionNotSet(&disksize, prompt, o.In, o.Out, o.Err)
vmDriverValue := o.Flags.Driver
defaultDriver := ""
if len(vmDriverValue) == 0 {
switch runtime.GOOS {
case "darwin":
defaultDriver = o.defaultMacVMDriver()
case "windows":
defaultDriver = "hyperv"
case "linux":
defaultDriver = "kvm"
default:
defaultDriver = "virtualbox"
}
}
// only add drivers that are appropriate for this OS
drivers := []string{defaultDriver}
if defaultDriver == "kvm" {
drivers = append(drivers, "kvm2")
}
if defaultDriver != "virtualbox" {
drivers = append(drivers, "virtualbox")
}
if runtime.GOOS == "darwin" {
if util.StringArrayIndex(drivers, "xhyve") < 0 {
drivers = append(drivers, "xhyve")
}
}
if runtime.GOOS == "linux" {
drivers = append(drivers, "none")
}
prompts := &survey.Select{
Message: "Select driver:",
Options: drivers,
Default: defaultDriver,
Help: "VM driver, defaults to recommended native virtualisation",
}
showPromptIfOptionNotSet(&vmDriverValue, prompts, o.In, o.Out, o.Err)
if vmDriverValue != "none" {
err := o.doInstallMissingDependencies([]string{vmDriverValue})
if err != nil {
log.Errorf("error installing missing dependencies %v, please fix or install manually then try again", err)
os.Exit(-1)
}
}
args := []string{"start", "--memory", mem, "--cpus", cpu, "--disk-size", disksize, "--vm-driver", vmDriverValue, "--bootstrapper=kubeadm"}
// Show verbose output for minikube cluster creation if verbose flag is set
if o.Verbose {
args = append(args, "--logtostderr", "--v=3")
}
hyperVVirtualSwitch := o.Flags.HyperVVirtualSwitch
if hyperVVirtualSwitch != "" {
args = append(args, "--hyperv-virtual-switch", hyperVVirtualSwitch)
}
kubernetesVersion := o.Flags.ClusterVersion
if kubernetesVersion != "" {
args = append(args, "--kubernetes-version", kubernetesVersion)
}
o.Out.Write([]byte("Creating Minikube cluster...\n"))
err := o.RunCommand("minikube", args...)
if err != nil {
return err
} else {
o.Out.Write([]byte("Minikube cluster created.\n"))
}
err = o.retry(3, 10*time.Second, func() (err error) {
err = o.RunCommand("kubectl", "create", "clusterrolebinding", "add-on-cluster-admin", "--clusterrole", "cluster-admin", "--serviceaccount", "kube-system:default")
return
})
if err != nil {
return err
}
ip, err := o.getCommandOutput("", "minikube", "ip")
if err != nil {
return err
}
o.InstallOptions.Flags.Domain = ip + ".nip.io"
log.Info("Initialising cluster ...\n")
err = o.initAndInstall(MINIKUBE)
if err != nil {
return err
}
context, err := o.getCommandOutput("", "kubectl", "config", "current-context")
if err != nil {
return err
}
ns := o.Flags.Namespace
if ns == "" {
_, ns, _ = o.KubeClient()
if err != nil {
return err
}
}
err = o.RunCommand("kubectl", "config", "set-context", context, "--namespace", ns)
if err != nil {
return err
}
err = o.RunCommand("kubectl", "get", "ingress")
if err != nil {
return err
}
return nil
}
func showPromptIfOptionNotSet(option *string, p survey.Prompt, in terminal.FileReader, out terminal.FileWriter, errOut io.Writer) error {
surveyOpts := survey.WithStdio(in, out, errOut)
if *option == "" {
err := survey.AskOne(p, option, nil, surveyOpts)
if err != nil {
return err
}
}
return nil
}