/
utils.go
189 lines (171 loc) · 4.85 KB
/
utils.go
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package main
import (
"context"
"encoding/json"
"fmt"
"strconv"
"strings"
"time"
"unicode"
"github.com/aliyun/alibaba-cloud-sdk-go/sdk/requests"
"github.com/aliyun/alibaba-cloud-sdk-go/services/cs"
errs "github.com/pkg/errors"
"k8s.io/api/core/v1"
"k8s.io/api/rbac/v1beta1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
)
const (
defaultNamespace = "default"
clusterAdmin = "cluster-admin"
netesDefault = "netes-default"
)
func TickerContext(ctx context.Context, duration time.Duration) <-chan time.Time {
ticker := time.NewTicker(duration)
go func() {
<-ctx.Done()
ticker.Stop()
}()
return ticker.C
}
// GenerateServiceAccountToken generate a serviceAccountToken for clusterAdmin given a rest clientset
func GenerateServiceAccountToken(clientset kubernetes.Interface) (string, error) {
serviceAccount := &v1.ServiceAccount{
ObjectMeta: metav1.ObjectMeta{
Name: netesDefault,
},
}
_, err := clientset.CoreV1().ServiceAccounts(defaultNamespace).Create(serviceAccount)
if err != nil && !errors.IsAlreadyExists(err) {
return "", fmt.Errorf("error creating service account: %v", err)
}
adminRole := &v1beta1.ClusterRole{
ObjectMeta: metav1.ObjectMeta{
Name: clusterAdmin,
},
Rules: []v1beta1.PolicyRule{
{
APIGroups: []string{"*"},
Resources: []string{"*"},
Verbs: []string{"*"},
},
{
NonResourceURLs: []string{"*"},
Verbs: []string{"*"},
},
},
}
clusterAdminRole, err := clientset.RbacV1beta1().ClusterRoles().Get(clusterAdmin, metav1.GetOptions{})
if err != nil {
clusterAdminRole, err = clientset.RbacV1beta1().ClusterRoles().Create(adminRole)
if err != nil {
return "", fmt.Errorf("error creating admin role: %v", err)
}
}
clusterRoleBinding := &v1beta1.ClusterRoleBinding{
ObjectMeta: metav1.ObjectMeta{
Name: "netes-default-clusterRoleBinding",
},
Subjects: []v1beta1.Subject{
{
Kind: "ServiceAccount",
Name: serviceAccount.Name,
Namespace: "default",
APIGroup: v1.GroupName,
},
},
RoleRef: v1beta1.RoleRef{
Kind: "ClusterRole",
Name: clusterAdminRole.Name,
APIGroup: v1beta1.GroupName,
},
}
if _, err = clientset.RbacV1beta1().ClusterRoleBindings().Create(clusterRoleBinding); err != nil && !errors.IsAlreadyExists(err) {
return "", fmt.Errorf("error creating role bindings: %v", err)
}
start := time.Millisecond * 250
for i := 0; i < 5; i++ {
time.Sleep(start)
if serviceAccount, err = clientset.CoreV1().ServiceAccounts(defaultNamespace).Get(serviceAccount.Name, metav1.GetOptions{}); err != nil {
return "", fmt.Errorf("error getting service account: %v", err)
}
if len(serviceAccount.Secrets) > 0 {
secret := serviceAccount.Secrets[0]
secretObj, err := clientset.CoreV1().Secrets(defaultNamespace).Get(secret.Name, metav1.GetOptions{})
if err != nil {
return "", fmt.Errorf("error getting secret: %v", err)
}
if token, ok := secretObj.Data["token"]; ok {
return string(token), nil
}
}
start = start * 2
}
return "", errs.New("failed to fetch serviceAccountToken")
}
// NewCsAPIRequest constructs general aliyun sdk request
func NewCsAPIRequest(apiName, method string) *requests.CommonRequest {
requests.NewCommonRequest()
request := requests.NewCommonRequest()
request.Version = "2015-12-15"
request.ApiName = apiName
request.Method = method
request.SetDomain("cs.aliyuncs.com")
request.SetScheme(requests.HTTPS)
request.SetContentType("application/json;charset=utf-8")
return request
}
func ProcessRequest(svc *cs.Client, request *requests.CommonRequest, obj interface{}) error {
response, err := svc.ProcessCommonRequest(request)
if err != nil && !strings.Contains(err.Error(), "JsonUnmarshalError") {
return err
}
if obj != nil {
if err := json.Unmarshal(response.GetHttpContentBytes(), obj); err != nil {
return err
}
}
return nil
}
// compareVersion compares two version strings
// returns -1 if v1 < v2, 1 if v1 > v2, 0 otherwise.
func compareVersion(v1, v2 string) int {
var (
currTab = strings.Split(v1, ".")
otherTab = strings.Split(v2, ".")
)
max := len(currTab)
if len(otherTab) > max {
max = len(otherTab)
}
for i := 0; i < max; i++ {
var currInt, otherInt int
if len(currTab) > i {
currInt, _ = strconv.Atoi(getHeadDigits(currTab[i]))
}
if len(otherTab) > i {
otherInt, _ = strconv.Atoi(getHeadDigits(otherTab[i]))
}
if currInt > otherInt {
return 1
}
if otherInt > currInt {
return -1
}
}
return 0
}
// getHeadDigits returns the digit part at the beginning of a sting
func getHeadDigits(raw string) string {
for idx, r := range raw {
if !unicode.IsDigit(r) {
return raw[:idx]
}
}
return raw
}
// versionGreaterThan checks if a version is greater than another
func versionGreaterThan(v, other string) bool {
return compareVersion(v, other) == 1
}