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init.go
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init.go
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package cmd
import (
"errors"
"io"
"os"
"time"
"strings"
"fmt"
"github.com/jenkins-x/jx/pkg/jx/cmd/log"
"github.com/jenkins-x/jx/pkg/jx/cmd/templates"
cmdutil "github.com/jenkins-x/jx/pkg/jx/cmd/util"
"github.com/jenkins-x/jx/pkg/kube"
"github.com/spf13/cobra"
"gopkg.in/AlecAivazis/survey.v1"
"k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/client-go/kubernetes"
)
// InitOptions the flags for running init
type InitOptions struct {
CommonOptions
Client clientset.Clientset
Flags InitFlags
}
type InitFlags struct {
Domain string
Provider string
}
const (
INGRESS_SERVICE_NAME = "jxing-nginx-ingress-controller"
)
var (
initLong = templates.LongDesc(`
This command installs the Jenkins X platform on a connected kubernetes cluster
`)
initExample = templates.Examples(`
jx init
`)
)
// NewCmdInit creates a command object for the generic "init" action, which
// primes a kubernetes cluster so it's ready for jenkins x to be installed
func NewCmdInit(f cmdutil.Factory, out io.Writer, errOut io.Writer) *cobra.Command {
options := &InitOptions{
CommonOptions: CommonOptions{
Factory: f,
Out: out,
Err: errOut,
},
}
cmd := &cobra.Command{
Use: "init",
Short: "Init Jenkins X",
Long: initLong,
Example: initExample,
Run: func(cmd *cobra.Command, args []string) {
options.Cmd = cmd
options.Args = args
err := options.Run()
cmdutil.CheckErr(err)
},
}
cmd.Flags().StringVarP(&options.Flags.Provider, "provider", "", "", "Cloud service providing the kubernetes cluster. Supported providers: [minikube,gke,aks]")
cmd.Flags().StringVarP(&options.Flags.Domain, "domain", "d", "", "Domain to expose ingress endpoints. Example: jenkinsx.io")
return cmd
}
func (o *InitOptions) Run() error {
var err error
o.Flags.Provider, err = o.GetCloudProvider(o.Flags.Provider)
if err != nil {
return err
}
// helm init
err = o.initHelm()
if err != nil {
log.Fatalf("helm init failed: %v", err)
os.Exit(-1)
}
// draft init
err = o.initDraft()
if err != nil {
log.Fatalf("draft init failed: %v", err)
os.Exit(-1)
}
// install ingress
err = o.initIngress()
if err != nil {
log.Fatalf("ingress init failed: %v", err)
os.Exit(-1)
}
return nil
}
func (o *InitOptions) initHelm() error {
f := o.Factory
client, _, err := f.CreateClient()
if err != nil {
return err
}
running, err := kube.IsDeploymentRunning(client, "tiller-deploy", "kube-system")
if running {
return nil
}
if err == nil && !running {
return errors.New("existing tiller deployment found but not running, please check the kube-system namespace and resolve any issues")
}
if !running {
err = o.runCommand("helm", "init")
if err != nil {
return err
}
}
err = kube.WaitForDeploymentToBeReady(client, "tiller-deploy", "kube-system", 5*time.Minute)
if err != nil {
return err
}
log.Success("helm installed and configured")
return nil
}
func (o *InitOptions) initDraft() error {
f := o.Factory
client, _, err := f.CreateClient()
if err != nil {
return err
}
running, err := kube.IsDeploymentRunning(client, "draftd", "kube-system")
if err == nil && !running {
return errors.New("existing draftd deployment found but not running, please check the kube-system namespace and resolve any issues")
}
err = o.removeDraftRepoIfInstalled("github.com/Azure/draft")
if err != nil {
return err
}
if running || o.Flags.Provider == GKE || o.Flags.Provider == AKS {
err = o.runCommand("draft", "init", "--auto-accept", "--client-only")
} else {
err = o.runCommand("draft", "init", "--auto-accept")
}
if err != nil {
return err
}
err = o.removeDraftRepoIfInstalled("github.com/jenkins-x/draft-repo")
if err != nil {
return err
}
err = o.runCommand("draft", "pack-repo", "add", "https://github.com/jenkins-x/draft-repo")
if err != nil {
log.Warn("error adding pack to draft, if you are using git 2.16.1 take a look at this issue for a workaround https://github.com/jenkins-x/jx/issues/176#issuecomment-361897946")
return err
}
if !running && o.Flags.Provider != GKE && o.Flags.Provider != AKS {
err = kube.WaitForDeploymentToBeReady(client, "draftd", "kube-system", 5*time.Minute)
if err != nil {
return err
}
}
log.Success("draft installed and configured")
return nil
}
// this happens in `draft init` too, except there seems to be a timing issue where the repo add fails if done straight after their repo remove.
func (o *InitOptions) removeDraftRepoIfInstalled(repo string) error {
text, err := o.getCommandOutput("", "draft", "pack-repo", "list")
if err != nil {
// if pack-repo list fails then it's because no repos currently exist
return nil
}
if strings.Contains(text, repo) {
log.Warnf("existing repo %s found, we recommend to remove and let draft init recreate, shall we do this now?", repo)
return o.runCommandInteractive(true, "draft", "pack-repo", "remove", repo)
}
return nil
}
func (o *InitOptions) initIngress() error {
f := o.Factory
client, _, err := f.CreateClient()
if err != nil {
return err
}
currentContext, err := o.getCommandOutput("", "kubectl", "config", "current-context")
if err != nil {
return err
}
if currentContext == "minikube" {
if o.Flags.Provider == "" {
o.Flags.Provider = MINIKUBE
}
addons, err := o.getCommandOutput("", "minikube", "addons", "list")
if err != nil {
return err
}
if strings.Contains(addons, "- ingress: enabled") {
log.Success("nginx ingress controller already enabled")
return nil
}
err = o.runCommand("minikube", "addons", "enable", "ingress")
if err != nil {
return err
}
log.Success("nginx ingress controller now enabled on minikube")
return nil
}
podLabels := labels.SelectorFromSet(labels.Set(map[string]string{"app": "nginx-ingress", "component": "controller"}))
options := meta_v1.ListOptions{LabelSelector: podLabels.String()}
podList, err := client.CoreV1().Pods("kube-system").List(options)
if err != nil {
return err
}
if podList != nil && len(podList.Items) > 0 {
log.Info("existing nginx ingress controller found, no need to install")
return nil
}
installIngressController := false
prompt := &survey.Confirm{
Message: "No existing ingress controller found in the kube-system namespace, shall we install one?",
Default: true,
Help: "An ingress controller works with an external loadbalancer so you can access Jenkins X and your applications",
}
survey.AskOne(prompt, &installIngressController, nil)
if !installIngressController {
return nil
}
i := 0
for {
err = o.runCommand("helm", "install", "--name", "jxing", "stable/nginx-ingress", "--namespace", "kube-system")
if err != nil {
if i >= 3 {
break
}
i++
time.Sleep(time.Second)
} else {
break
}
}
err = kube.WaitForDeploymentToBeReady(client, INGRESS_SERVICE_NAME, "kube-system", 10*time.Minute)
if err != nil {
return err
}
if o.Flags.Provider == GKE || o.Flags.Provider == AKS {
log.Info("Waiting for external loadbalancer to be created and update the nginx-ingress-controller service in kube-system namespace\n")
err = kube.WaitForExternalIP(client, INGRESS_SERVICE_NAME, "kube-system", 10*time.Minute)
if err != nil {
return err
}
log.Infof("External loadbalancer created\n")
o.Flags.Domain, err = o.GetDomain(client, o.Flags.Domain, o.Flags.Domain)
if err != nil {
return err
}
}
log.Success("nginx ingress controller installed and configured")
return nil
}
func (o *CommonOptions) GetDomain(client *kubernetes.Clientset, domain string, provider string) (string, error) {
var address string
if provider == MINIKUBE {
ip, err := o.getCommandOutput("", "minikube", "ip")
if err != nil {
return "", err
}
address = ip
} else {
svc, err := client.CoreV1().Services("kube-system").Get(INGRESS_SERVICE_NAME, meta_v1.GetOptions{})
if err != nil {
return "", err
}
if svc != nil {
for _, v := range svc.Status.LoadBalancer.Ingress {
if v.IP != "" {
address = v.IP
} else if v.Hostname != "" {
address = v.Hostname
}
}
}
}
defaultDomain := fmt.Sprintf("%s.nip.io", address)
if domain == "" {
log.Successf("You can now configure a wildcard DNS pointing to the new loadbalancer address %s", address)
log.Infof("If you don't have a wildcard DNS yet you can use the default %s", defaultDomain)
if domain == "" {
prompt := &survey.Input{
Message: "Domain",
Default: defaultDomain,
Help: "Enter your custom domain that is used to generate Ingress rules, defaults to the magic dns nip.io",
}
survey.AskOne(prompt, &domain, nil)
}
if domain == "" {
domain = defaultDomain
}
} else {
if domain != defaultDomain {
log.Successf("You can now configure your wildcard DNS %s to point to %s\n", domain, address)
}
}
return domain, nil
}