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token.go
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token.go
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package token
import (
"github.com/AlecAivazis/survey/v2"
"github.com/cloudflare/cfssl/log"
"github.com/yahaa/gen-kubecfg/generate"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
)
type tokenKubeconfig struct {
client generate.Client
clientSet kubernetes.Interface
}
func New(c generate.Client) generate.Generator {
return &tokenKubeconfig{
client: c,
clientSet: c.ClientSet(),
}
}
func (g *tokenKubeconfig) Generate(p *generate.Params) {
generate.KubeConfig(*p)
}
func (g *tokenKubeconfig) ParseParams(p *generate.Params) {
clusterRoleNames := g.client.GetClusterRoleNames()
var commonQ = []*survey.Question{
{
Name: "existedSA",
Prompt: &survey.Confirm{
Message: "Please confirm using existed service account('y' using existed, 'n' create a new one):",
Default: false,
},
},
{
Name: "serviceAccountNamespace",
Prompt: &survey.Input{Message: "Please input namespace of the service account:"},
Validate: survey.Required,
},
{
Name: "scope",
Prompt: &survey.Select{
Message: "Please choose permission scope for this user:",
Options: []string{generate.ClusterScope, generate.NamespaceScope},
Default: generate.ClusterScope,
},
},
}
if err := survey.Ask(commonQ, p); err != nil {
log.Fatalf("got questions answers err: %v", err)
}
if !p.ExistedSA {
var inputSAQ = []*survey.Question{
{
Name: "username",
Prompt: &survey.Input{Message: "Please input service account name which you want to generate kubeconfig for:"},
Validate: survey.Required,
},
}
if err := survey.Ask(inputSAQ, p); err != nil {
log.Fatalf("got questions answers err: %v", err)
}
} else {
accountNames := g.client.GetServiceAccountNames(p.ServiceAccountNamespace)
var selectSAQ = []*survey.Question{
{
Name: "username",
Prompt: &survey.Select{
Message: "Please choose one service account:",
Options: accountNames,
},
},
}
if err := survey.Ask(selectSAQ, p); err != nil {
log.Fatalf("got questions answers err: %v", err)
}
}
var saveAsQ = []*survey.Question{
{
Name: "saveAs",
Prompt: &survey.Input{
Message: "Please input kubeconfig save as name(default 'username.kubeconfig'):",
},
},
}
if err := survey.Ask(saveAsQ, p); err != nil {
log.Fatalf("got questions answers err: %v", err)
}
if p.Scope == generate.ClusterScope {
var scopeQ = []*survey.Question{
{
Name: "clusterRoles",
Prompt: &survey.MultiSelect{
Message: "Please choose some cluster roles:",
Options: clusterRoleNames,
},
},
}
if err := survey.Ask(scopeQ, p); err != nil {
log.Fatalf("got questions answers err: %v", err)
}
} else {
var scopeQ = []*survey.Question{
{
Name: "namespaces",
Prompt: &survey.Input{
Message: "Please input namespaces you want to generate kubeconfig for, split by ',':",
},
Validate: survey.Required,
},
{
Name: "clusterRoles",
Prompt: &survey.MultiSelect{
Message: "Please choose some cluster roles:",
Options: clusterRoleNames,
},
},
}
if err := survey.Ask(scopeQ, p); err != nil {
log.Fatalf("got questions answers err: %v", err)
}
}
}
func (g *tokenKubeconfig) PreGenerate(p *generate.Params) {
if !p.ExistedSA {
accountNames := g.client.GetServiceAccountNames(p.ServiceAccountNamespace)
for _, name := range accountNames {
if name == p.Username {
log.Fatalf("service account \"%s\" already exist !", name)
}
}
sa := &corev1.ServiceAccount{
ObjectMeta: metav1.ObjectMeta{
Name: p.Username,
},
}
if _, err := g.clientSet.CoreV1().ServiceAccounts(p.ServiceAccountNamespace).Create(sa); err != nil {
log.Fatalf("service account create err: %v", err)
}
}
sa, err := g.clientSet.CoreV1().ServiceAccounts(p.ServiceAccountNamespace).Get(p.Username, metav1.GetOptions{})
if err != nil {
log.Fatalf("got service account err: %v", err)
}
secret, err := g.clientSet.CoreV1().Secrets(p.ServiceAccountNamespace).Get(sa.Secrets[0].Name, metav1.GetOptions{})
if err != nil {
log.Fatalf("got service account err: %v", err)
}
p.Token = string(secret.Data["token"])
}
func (g *tokenKubeconfig) PostGenerate(p *generate.Params) {
if err := g.client.GenerateBinding("ServiceAccount", p.ServiceAccountNamespace, p.Username, p.ClusterRoles, p.NamespaceSlice()); err != nil {
log.Errorf("generate binding err: %v", err)
}
}