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eks.go
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eks.go
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package k8sclient
import (
"bufio"
"bytes"
"context"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"net/http"
"os"
"regexp"
"strconv"
"strings"
"sync"
"time"
"github.com/aws/aws-k8s-tester/pkg/fileutil"
"github.com/aws/aws-k8s-tester/pkg/httputil"
"github.com/aws/aws-k8s-tester/pkg/logutil"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/sts"
"go.uber.org/zap"
"golang.org/x/oauth2"
apps_v1 "k8s.io/api/apps/v1"
apps_v1beta1 "k8s.io/api/apps/v1beta1"
apps_v1beta2 "k8s.io/api/apps/v1beta2"
certificatesv1beta1 "k8s.io/api/certificates/v1beta1"
v1 "k8s.io/api/core/v1"
extensions_v1beta1 "k8s.io/api/extensions/v1beta1"
networking_v1 "k8s.io/api/networking/v1"
policy_v1beta1 "k8s.io/api/policy/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/version"
"k8s.io/client-go/kubernetes"
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
"k8s.io/utils/exec"
"sigs.k8s.io/yaml"
)
// EKSConfig defines EKS client configuration.
type EKSConfig struct {
// Logger is the logger to log client operations.
Logger *zap.Logger
// Region is used for EKS auth provider configuration.
Region string
// ClusterName is the EKS cluster name.
// Used for EKS auth provider configuration.
ClusterName string
// ClusterAPIServerEndpoint is the EKS kube-apiserver endpoint.
// Use for kubeconfig.
ClusterAPIServerEndpoint string
// ClusterCADecoded is the cluster CA base64-decoded.
// Use for kubeconfig.
ClusterCADecoded string
// KubectlPath is the kubectl path, used for health checks.
KubectlPath string
// KubeConfigPath is the kubeconfig path to load.
KubeConfigPath string
// KubeConfigContext is the kubeconfig context.
KubeConfigContext string
// ServerVersion is the kube-apiserver version.
// If not empty, this is used for health checks.
ServerVersion string
// UpgradeServerVersion is the target cluster upgrade version
// used for sever version checks.
UpgradeServerVersion string
// EncryptionEnabled is true if EKS cluster is created with KMS encryption enabled.
// If true, the health check checks if data encryption key has been generated
// to encrypt initial service account tokens, via kube-apiserver metrics endpoint.
EncryptionEnabled bool
// EnablePrompt is true to enable interactive mode.
EnablePrompt bool
// Dir is the directory to store all upgrade/rollback files.
Dir string
// Clients is the number of kubernetes clients to create.
// Default is 1.
Clients int
// ClientQPS is the QPS for kubernetes client.
// To use while talking with kubernetes apiserver.
//
// Kubernetes client DefaultQPS is 5.
// Kubernetes client DefaultBurst is 10.
// ref. https://github.com/kubernetes/kubernetes/blob/4d0e86f0b8d1eae00a202009858c8739e4c9402e/staging/src/k8s.io/client-go/rest/config.go#L43-L46
//
// kube-apiserver default inflight requests limits are:
// FLAG: --max-mutating-requests-inflight="200"
// FLAG: --max-requests-inflight="400"
// ref. https://github.com/kubernetes/kubernetes/blob/4d0e86f0b8d1eae00a202009858c8739e4c9402e/staging/src/k8s.io/apiserver/pkg/server/config.go#L300-L301
//
ClientQPS float32
// ClientBurst is the burst for kubernetes client.
// To use while talking with kubernetes apiserver
//
// Kubernetes client DefaultQPS is 5.
// Kubernetes client DefaultBurst is 10.
// ref. https://github.com/kubernetes/kubernetes/blob/4d0e86f0b8d1eae00a202009858c8739e4c9402e/staging/src/k8s.io/client-go/rest/config.go#L43-L46
//
// kube-apiserver default inflight requests limits are:
// FLAG: --max-mutating-requests-inflight="200"
// FLAG: --max-requests-inflight="400"
// ref. https://github.com/kubernetes/kubernetes/blob/4d0e86f0b8d1eae00a202009858c8739e4c9402e/staging/src/k8s.io/apiserver/pkg/server/config.go#L300-L301
//
ClientBurst int
// ClientTimeout is the client timeout.
ClientTimeout time.Duration
}
// EKS defines EKS client operations.
type EKS interface {
// KubernetesClientSet returns a new kubernetes client set.
KubernetesClientSet() *kubernetes.Clientset
// CheckEKSHealth checks the EKS health.
CheckHealth() error
// FetchServerVersion fetches the version from kube-apiserver.
//
// e.g.
//
// {
// "major": "1",
// "minor": "16+",
// "gitVersion": "v1.16.8-eks-e16311",
// "gitCommit": "e163110a04dcb2f39c3325af96d019b4925419eb",
// "gitTreeState": "clean",
// "buildDate": "2020-03-27T22:37:12Z",
// "goVersion": "go1.13.8",
// "compiler": "gc",
// "platform": "linux/amd64"
// }
//
FetchServerVersion() (ServerVersionInfo, error)
// FetchSupportedAPIGroupVersions fetches all supported API group resources.
// ref. https://github.com/kubernetes/kubernetes/tree/master/staging/src/k8s.io/kubectl/pkg/cmd/apiresources
FetchSupportedAPIGroupVersions() (float64, map[string]struct{}, error)
// ListNamespaces returns the list of existing namespace names.
ListNamespaces(batchLimit int64, batchInterval time.Duration) ([]v1.Namespace, error)
// ListNodes returns the list of existing nodes.
ListNodes(batchLimit int64, batchInterval time.Duration) ([]v1.Node, error)
// ListNodes returns the list of existing CSRs.
ListCSRs(batchLimit int64, batchInterval time.Duration) ([]certificatesv1beta1.CertificateSigningRequest, error)
// ListPods returns the list of existing namespace names.
ListPods(namespace string, batchLimit int64, batchInterval time.Duration) ([]v1.Pod, error)
// ListConfigMaps returns the list of existing config maps.
ListConfigMaps(namespace string, batchLimit int64, batchInterval time.Duration) ([]v1.ConfigMap, error)
// ListSecrets returns the list of existing Secret objects.
ListSecrets(namespace string, batchLimit int64, batchInterval time.Duration) ([]v1.Secret, error)
ListAppsV1Deployments(namespace string, batchLimit int64, batchInterval time.Duration) (ss []apps_v1.Deployment, err error)
ListAppsV1StatefulSets(namespace string, batchLimit int64, batchInterval time.Duration) (ss []apps_v1.StatefulSet, err error)
ListAppsV1DaemonSets(namespace string, batchLimit int64, batchInterval time.Duration) (ss []apps_v1.DaemonSet, err error)
ListAppsV1ReplicaSets(namespace string, batchLimit int64, batchInterval time.Duration) (ss []apps_v1.ReplicaSet, err error)
ListNetworkingV1NetworkPolicies(namespace string, batchLimit int64, batchInterval time.Duration) (ss []networking_v1.NetworkPolicy, err error)
ListPolicyV1beta1PodSecurityPolicies(batchLimit int64, batchInterval time.Duration) (ss []policy_v1beta1.PodSecurityPolicy, err error)
ListAppsV1beta1Deployments(namespace string, batchLimit int64, batchInterval time.Duration) (ss []apps_v1beta1.Deployment, err error)
ListAppsV1beta1StatefulSets(namespace string, batchLimit int64, batchInterval time.Duration) (ss []apps_v1beta1.StatefulSet, err error)
ListAppsV1beta2Deployments(namespace string, batchLimit int64, batchInterval time.Duration) (ss []apps_v1beta2.Deployment, err error)
ListAppsV1beta2StatefulSets(namespace string, batchLimit int64, batchInterval time.Duration) (ss []apps_v1beta2.StatefulSet, err error)
ListExtensionsV1beta1DaemonSets(namespace string, batchLimit int64, batchInterval time.Duration) (ss []extensions_v1beta1.DaemonSet, err error)
ListExtensionsV1beta1Deployments(namespace string, batchLimit int64, batchInterval time.Duration) (ss []extensions_v1beta1.Deployment, err error)
ListExtensionsV1beta1ReplicaSets(namespace string, batchLimit int64, batchInterval time.Duration) (ss []extensions_v1beta1.ReplicaSet, err error)
ListExtensionsV1beta1NetworkPolicies(namespace string, batchLimit int64, batchInterval time.Duration) (ss []extensions_v1beta1.NetworkPolicy, err error)
ListExtensionsV1beta1PodSecurityPolicies(batchLimit int64, batchInterval time.Duration) (ss []extensions_v1beta1.PodSecurityPolicy, err error)
// GetObject get object type and object metadata using kubectl.
// The internal API group version is not exposed,
// thus kubectl converts API version internally.
// ref. https://github.com/kubernetes/kubernetes/issues/58131#issuecomment-403829566
GetObject(namespace string, kind string, name string) (obj Object, d []byte, err error)
// Deprecate checks deprecated API groups based on the current kube-apiserver version.
Deprecate(batchLimit int64, batchInterval time.Duration) error
}
type eks struct {
cfg *EKSConfig
mu sync.Mutex
clients []*kubernetes.Clientset
cur int
}
// NewEKS returns a new EKS client.
func NewEKS(cfg *EKSConfig) (e EKS, err error) {
if cfg == nil {
return nil, errors.New("nil EKSConfig")
}
if cfg.Logger == nil {
var err error
cfg.Logger, err = logutil.GetDefaultZapLogger()
if err != nil {
return nil, err
}
}
if cfg.Dir == "" {
cfg.Dir, err = ioutil.TempDir(os.TempDir(), "eks-dir")
if err != nil {
return nil, err
}
}
if err = os.MkdirAll(cfg.Dir, 0700); err != nil {
return nil, err
}
cfg.Logger.Info("created dir", zap.String("dir", cfg.Dir))
if cfg.Clients < 1 {
cfg.Clients = 1
}
cfg.Logger.Info("creating clients", zap.String("kubeconfig", cfg.KubeConfigPath))
ek := &eks{cfg: cfg, clients: make([]*kubernetes.Clientset, cfg.Clients)}
for i := 0; i < cfg.Clients; i++ {
ek.clients[i], err = createClient(cfg)
if err != nil {
cfg.Logger.Warn("failed to create client", zap.Int("index", i), zap.Error(err))
return nil, err
}
cfg.Logger.Info("added a client", zap.Int("index", i), zap.Int("total-clients", cfg.Clients))
}
return ek, nil
}
func createClient(cfg *EKSConfig) (cli *kubernetes.Clientset, err error) {
var kcfg *restclient.Config
if cfg.KubeConfigPath != "" {
switch {
case cfg.KubeConfigContext != "":
cfg.Logger.Info("creating restclient.Config from KUBECONFIG and context",
zap.String("kubeconfig", cfg.KubeConfigPath),
zap.String("context", cfg.KubeConfigContext),
)
kcfg, err = clientcmd.NewNonInteractiveDeferredLoadingClientConfig(
&clientcmd.ClientConfigLoadingRules{
ExplicitPath: cfg.KubeConfigPath,
},
&clientcmd.ConfigOverrides{
CurrentContext: cfg.KubeConfigContext,
ClusterInfo: clientcmdapi.Cluster{Server: ""},
},
).ClientConfig()
if kcfg == nil || err != nil {
cfg.Logger.Warn("failed to create restclient.Config from KUBECONFIG and context", zap.Error(err))
kcfg = nil
}
case cfg.KubeConfigContext == "":
cfg.Logger.Info("creating restclient.Config from KUBECONFIG",
zap.String("kubeconfig", cfg.KubeConfigPath),
)
kcfg, err = clientcmd.BuildConfigFromFlags("", cfg.KubeConfigPath)
if kcfg == nil || err != nil {
cfg.Logger.Warn("failed to create restclient.Config from KUBECONFIG", zap.Error(err))
kcfg = nil
}
}
}
if kcfg == nil {
cfg.Logger.Info("creating restclient.Config from previous cluster state")
kcfg = createClientConfigEKS(cfg)
if kcfg == nil {
cfg.Logger.Warn("failed to create restclient.Config previous cluster state")
kcfg = nil
}
}
if kcfg == nil {
// https://github.com/kubernetes/client-go/blob/master/examples/in-cluster-client-configuration/main.go
cfg.Logger.Info("creating restclient.Config from in-cluster config")
kcfg, err = restclient.InClusterConfig()
if kcfg == nil || err != nil {
cfg.Logger.Warn("failed to create restclient.Config from in-cluster config", zap.Error(err))
kcfg = nil
}
}
if kcfg == nil {
cfg.Logger.Info("creating restclient.Config from client defaults")
defaultConfig := clientcmd.DefaultClientConfig
kcfg, err = defaultConfig.ClientConfig()
if kcfg == nil || err != nil {
cfg.Logger.Warn("failed to create restclient.Config from client defaults", zap.Error(err))
kcfg = nil
}
}
if kcfg == nil {
cfg.Logger.Warn("failed to create restclient.Config config")
err = errors.New("failed to create restclient.Config config")
return nil, err
}
if cfg.ClusterAPIServerEndpoint == "" {
cfg.ClusterAPIServerEndpoint = kcfg.Host
cfg.Logger.Info("updated apiserver endpoint from kubeconfig", zap.String("apiserver-endpoint", kcfg.Host))
} else if cfg.ClusterAPIServerEndpoint != kcfg.Host {
cfg.Logger.Warn("unexpected apiserver endpoint",
zap.String("apiserver-endpoint", cfg.ClusterAPIServerEndpoint),
zap.String("kubeconfig-host", kcfg.Host),
)
}
if cfg.ClusterAPIServerEndpoint == "" {
return nil, errors.New("empty ClusterAPIServerEndpoint")
}
if cfg.ClusterCADecoded == "" {
cfg.ClusterCADecoded = string(kcfg.TLSClientConfig.CAData)
cfg.Logger.Info("updated cluster ca from kubeconfig", zap.String("cluster-ca", cfg.ClusterCADecoded))
} else if cfg.ClusterCADecoded != string(kcfg.TLSClientConfig.CAData) {
cfg.Logger.Warn("unexpected cluster ca",
zap.String("cluster-ca", cfg.ClusterCADecoded),
zap.String("kubeconfig-cluster-ca", string(kcfg.TLSClientConfig.CAData)),
)
}
if cfg.ClusterCADecoded == "" {
cfg.Logger.Warn("no cluster CA found in restclient.Config")
}
if kcfg.AuthProvider != nil {
if cfg.Region == "" {
cfg.Region = kcfg.AuthProvider.Config["region"]
cfg.Logger.Info("updated region from kubeconfig", zap.String("apiserver-endpoint", kcfg.AuthProvider.Config["region"]))
} else if cfg.Region != kcfg.AuthProvider.Config["region"] {
cfg.Logger.Warn("unexpected region",
zap.String("apiserver-endpoint", cfg.Region),
zap.String("kubeconfig-host", kcfg.AuthProvider.Config["region"]),
)
}
if cfg.ClusterName == "" {
cfg.ClusterName = kcfg.AuthProvider.Config["cluster-name"]
cfg.Logger.Info("updated cluster-name from kubeconfig", zap.String("apiserver-endpoint", kcfg.AuthProvider.Config["cluster-name"]))
} else if cfg.ClusterName != kcfg.AuthProvider.Config["cluster-name"] {
cfg.Logger.Warn("unexpected cluster-name",
zap.String("apiserver-endpoint", cfg.ClusterName),
zap.String("kubeconfig-host", kcfg.AuthProvider.Config["cluster-name"]),
)
}
}
if cfg.Region == "" {
cfg.Logger.Warn("no region found in restclient.Config")
}
if cfg.ClusterName == "" {
cfg.Logger.Warn("no cluster name found in restclient.Config")
}
if cfg.ClientQPS > 0 {
kcfg.QPS = cfg.ClientQPS
}
if cfg.ClientBurst > 0 {
kcfg.Burst = cfg.ClientBurst
}
if cfg.ClientTimeout > 0 {
kcfg.Timeout = cfg.ClientTimeout
}
cfg.Logger.Info("successfully created restclient.Config",
zap.String("cluster-api-server-endpoint", cfg.ClusterAPIServerEndpoint),
zap.String("host", kcfg.Host),
zap.String("server-name", kcfg.ServerName),
zap.String("user-name", kcfg.Username),
)
cli, err = kubernetes.NewForConfig(kcfg)
if err != nil {
cfg.Logger.Warn("failed to create kubernetes.ClientSet", zap.Error(err))
return nil, err
}
cfg.Logger.Info("successfully created kubernetes.ClientSet", zap.Float32("qps", kcfg.QPS), zap.Int("burst", kcfg.Burst))
return cli, nil
}
// ServerVersionInfo is the server version info from kube-apiserver
type ServerVersionInfo struct {
version.Info
VersionValue float64 `json:"version-value"`
}
func (sv ServerVersionInfo) String() string {
d, err := json.MarshalIndent(sv, "", " ")
if err != nil {
return sv.GitVersion
}
return string(d)
}
func (e *eks) getClient() *kubernetes.Clientset {
e.mu.Lock()
if len(e.clients) == 0 {
e.mu.Unlock()
return nil
}
e.cur = (e.cur + 1) % len(e.clients)
cli := e.clients[e.cur]
e.mu.Unlock()
return cli
}
// KubernetesClientSet returns a new kubernetes client set.
func (e *eks) KubernetesClientSet() *kubernetes.Clientset {
return e.getClient()
}
const authProviderName = "eks"
func createClientConfigEKS(cfg *EKSConfig) *restclient.Config {
if cfg.Region == "" {
return nil
}
if cfg.ClusterName == "" {
return nil
}
if cfg.ClusterAPIServerEndpoint == "" {
return nil
}
if cfg.ClusterCADecoded == "" {
return nil
}
cfg.Logger.Info("created restclient.Config from previous cluster status")
return &restclient.Config{
Host: cfg.ClusterAPIServerEndpoint,
TLSClientConfig: restclient.TLSClientConfig{
CAData: []byte(cfg.ClusterCADecoded),
},
AuthProvider: &clientcmdapi.AuthProviderConfig{
Name: authProviderName,
Config: map[string]string{
"region": cfg.Region,
"cluster-name": cfg.ClusterName,
},
},
}
}
func init() {
restclient.RegisterAuthProviderPlugin(authProviderName, newAuthProviderEKS)
}
func newAuthProviderEKS(_ string, config map[string]string, _ restclient.AuthProviderConfigPersister) (restclient.AuthProvider, error) {
awsRegion, ok := config["region"]
if !ok {
return nil, fmt.Errorf("'clientcmdapi.AuthProviderConfig' does not include 'region' key %+v", config)
}
clusterName, ok := config["cluster-name"]
if !ok {
return nil, fmt.Errorf("'clientcmdapi.AuthProviderConfig' does not include 'cluster-name' key %+v", config)
}
sess := session.Must(session.NewSession(aws.NewConfig().WithRegion(awsRegion)))
return &eksAuthProvider{ts: newTokenSourceEKS(sess, clusterName)}, nil
}
type eksAuthProvider struct {
ts oauth2.TokenSource
}
func (p *eksAuthProvider) WrapTransport(rt http.RoundTripper) http.RoundTripper {
return &oauth2.Transport{
Source: p.ts,
Base: rt,
}
}
func (p *eksAuthProvider) Login() error {
return nil
}
func newTokenSourceEKS(sess *session.Session, clusterName string) oauth2.TokenSource {
return &eksTokenSource{sess: sess, clusterName: clusterName}
}
type eksTokenSource struct {
sess *session.Session
clusterName string
}
// Reference
// https://github.com/kubernetes-sigs/aws-iam-authenticator/blob/master/README.md#api-authorization-from-outside-a-cluster
// https://github.com/kubernetes-sigs/aws-iam-authenticator/blob/master/pkg/token/token.go
const (
v1Prefix = "k8s-aws-v1."
clusterIDHeader = "x-k8s-aws-id"
)
func (s *eksTokenSource) Token() (*oauth2.Token, error) {
stsAPI := sts.New(s.sess)
request, _ := stsAPI.GetCallerIdentityRequest(&sts.GetCallerIdentityInput{})
request.HTTPRequest.Header.Add(clusterIDHeader, s.clusterName)
payload, err := request.Presign(60)
if err != nil {
return nil, err
}
token := v1Prefix + base64.RawURLEncoding.EncodeToString([]byte(payload))
tokenExpiration := time.Now().Local().Add(14 * time.Minute)
return &oauth2.Token{
AccessToken: token,
TokenType: "Bearer",
Expiry: tokenExpiration,
}, nil
}
// CheckHealth checks the EKS health.
func (e *eks) CheckHealth() error {
err := e.checkHealth()
return err
}
func (e *eks) checkHealth() error {
if e.cfg == nil {
return errors.New("nil EKSConfig")
}
if e.cfg.KubectlPath == "" {
return errors.New("empty EKSConfig.KubectlPath")
}
if e.cfg.KubeConfigPath == "" {
return errors.New("empty EKSConfig.KubeConfigPath")
}
if e.cfg.ClusterAPIServerEndpoint == "" {
return errors.New("empty EKSConfig.ClusterAPIServerEndpoint")
}
if !fileutil.Exist(e.cfg.KubeConfigPath) {
return fmt.Errorf("%q not found", e.cfg.KubeConfigPath)
}
if !fileutil.Exist(e.cfg.KubectlPath) {
return fmt.Errorf("%q not found", e.cfg.KubectlPath)
}
if err := fileutil.EnsureExecutable(e.cfg.KubectlPath); err != nil {
return fmt.Errorf("cannot execute %q (%v)", e.cfg.KubectlPath, err)
}
ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
output, err := exec.New().CommandContext(
ctx,
e.cfg.KubectlPath,
"--kubeconfig="+e.cfg.KubeConfigPath,
"version",
).CombinedOutput()
cancel()
out := strings.TrimSpace(string(output))
if err != nil {
return fmt.Errorf("'kubectl version' failed %v (output %q)", err, out)
}
fmt.Printf("\n\"kubectl version\" output:\n%s\n\n", out)
vf, err := e.fetchServerVersion()
if err != nil {
return fmt.Errorf("fetch version info failed %v", err)
}
fmt.Printf("\n\"kubectl version\" info output:\n%s\n\n", vf.String())
ep := e.cfg.ClusterAPIServerEndpoint + "/version"
output, err = httputil.ReadInsecure(e.cfg.Logger, ioutil.Discard, ep)
if err != nil {
return err
}
out = strings.TrimSpace(string(output))
fmt.Printf("\n\n\"%s\" output:\n%s\n\n", ep, out)
if e.cfg.ServerVersion != "" && !strings.Contains(out, fmt.Sprintf(`"gitVersion": "v%s`, e.cfg.ServerVersion)) {
err = fmt.Errorf("%q does not contain version %q", out, e.cfg.ServerVersion)
}
if err != nil && e.cfg.UpgradeServerVersion != "" {
if !strings.Contains(out, fmt.Sprintf(`"gitVersion": "v%s`, e.cfg.UpgradeServerVersion)) {
err = fmt.Errorf("%v; does not contain version %q either", err, e.cfg.UpgradeServerVersion)
} else {
err = nil
}
}
if err != nil {
return err
}
ctx, cancel = context.WithTimeout(context.Background(), 15*time.Second)
output, err = exec.New().CommandContext(
ctx,
e.cfg.KubectlPath,
"--kubeconfig="+e.cfg.KubeConfigPath,
"cluster-info",
).CombinedOutput()
cancel()
out = strings.TrimSpace(string(output))
if err != nil {
return fmt.Errorf("'kubectl cluster-info' failed %v (output %q)", err, out)
}
if !strings.Contains(out, "is running at") {
return fmt.Errorf("'kubectl cluster-info' not ready (output %q)", out)
}
fmt.Printf("\n\"kubectl cluster-info\" output:\n%s\n\n", out)
ctx, cancel = context.WithTimeout(context.Background(), 15*time.Second)
output, err = exec.New().CommandContext(
ctx,
e.cfg.KubectlPath,
"--kubeconfig="+e.cfg.KubeConfigPath,
"get",
"cs",
).CombinedOutput()
cancel()
out = strings.TrimSpace(string(output))
if err != nil {
return fmt.Errorf("'kubectl get cs' failed %v (output %q)", err, out)
}
fmt.Printf("\n\"kubectl get cs\" output:\n%s\n\n", out)
ep = e.cfg.ClusterAPIServerEndpoint + "/healthz?verbose"
output, err = httputil.ReadInsecure(e.cfg.Logger, os.Stderr, ep)
if err != nil {
return err
}
out = strings.TrimSpace(string(output))
if !strings.Contains(out, "healthz check passed") {
return fmt.Errorf("%q does not contain 'healthz check passed'", out)
}
fmt.Printf("\n\n\"%s\" output (\"kubectl get --raw /healthz?verbose\"):\n%s\n", ep, out)
fmt.Printf("\n\"kubectl get namespaces\" output:\n")
ns, err := e.listNamespaces(150, 5*time.Second)
if err != nil {
return fmt.Errorf("failed to list namespaces %v", err)
}
for _, v := range ns {
e.cfg.Logger.Info("namespace", zap.String("name", v.GetName()))
}
println()
fmt.Printf("\n\"kubectl get pods -n=kube-system\" output:\n")
pods, err := e.listPods("kube-system", 150, 5*time.Second)
if err != nil {
return fmt.Errorf("failed to list pods %v", err)
}
for _, v := range pods {
cond := "Pending"
for _, cv := range v.Status.Conditions {
if cv.Status != v1.ConditionTrue {
continue
}
cond = string(cv.Type)
}
e.cfg.Logger.Info("kube-system pod", zap.String("name", v.GetName()), zap.String("condition", cond))
}
println()
fmt.Printf("\n\"kubectl get configmaps -n=kube-system\" output:\n")
configMaps, err := e.listConfigMaps("kube-system", 150, 5*time.Second)
if err != nil {
return fmt.Errorf("failed to list configmaps %v", err)
}
for _, v := range configMaps {
e.cfg.Logger.Info("kube-system configmap", zap.String("name", v.GetName()))
}
println()
fmt.Printf("\n\"curl -sL http://localhost:8080/metrics | grep storage_\" output:\n")
ctx, cancel = context.WithTimeout(context.Background(), time.Minute)
output, err = e.getClient().
CoreV1().
RESTClient().
Get().
RequestURI("/metrics").
Do(ctx).
Raw()
cancel()
if err != nil {
return fmt.Errorf("failed to fetch /metrics (%v)", err)
}
const (
// https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.17.md#deprecatedchanged-metrics
metricDEKGenSecondsCount = "apiserver_storage_data_key_generation_duration_seconds_count"
metricDEKGenMicroSecondsCount = "apiserver_storage_data_key_generation_latencies_microseconds_count"
metricEnvelopeCacheMiss = "apiserver_storage_envelope_transformation_cache_misses_total"
)
dekGenCnt, cacheMissCnt := int64(0), int64(0)
scanner := bufio.NewScanner(bytes.NewReader(output))
for scanner.Scan() {
line := scanner.Text()
switch {
case strings.HasPrefix(line, "# "):
continue
// https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.17.md#deprecatedchanged-metrics
case strings.HasPrefix(line, metricDEKGenSecondsCount+" "):
vs := strings.TrimSpace(strings.Replace(line, metricDEKGenSecondsCount, "", -1))
dekGenCnt, err = strconv.ParseInt(vs, 10, 64)
if err != nil {
e.cfg.Logger.Warn("failed to parse",
zap.String("line", line),
zap.Error(err),
)
}
// https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.17.md#deprecatedchanged-metrics
case strings.HasPrefix(line, metricDEKGenMicroSecondsCount+" "):
vs := strings.TrimSpace(strings.Replace(line, metricDEKGenMicroSecondsCount, "", -1))
dekGenCnt, err = strconv.ParseInt(vs, 10, 64)
if err != nil {
e.cfg.Logger.Warn("failed to parse",
zap.String("line", line),
zap.Error(err),
)
}
case strings.HasPrefix(line, metricEnvelopeCacheMiss+" "):
vs := strings.TrimSpace(strings.Replace(line, metricEnvelopeCacheMiss, "", -1))
cacheMissCnt, err = strconv.ParseInt(vs, 10, 64)
if err != nil {
e.cfg.Logger.Warn("failed to parse",
zap.String("line", line),
zap.Error(err),
)
}
}
if dekGenCnt > 0 || cacheMissCnt > 0 {
break
}
}
e.cfg.Logger.Info("encryption metrics",
zap.Int64("dek-gen-count", dekGenCnt),
zap.Int64("cache-miss-count", cacheMissCnt),
)
if e.cfg.EncryptionEnabled {
if dekGenCnt == 0 && cacheMissCnt == 0 {
return errors.New("encrypted enabled, unexpected /metrics")
}
e.cfg.Logger.Info("successfully checked encryption")
}
e.cfg.Logger.Info("successfully checked health")
return nil
}
// FetchServerVersion fetches the version from kube-apiserver.
//
// e.g.
//
// {
// "major": "1",
// "minor": "16+",
// "gitVersion": "v1.16.8-eks-e16311",
// "gitCommit": "e163110a04dcb2f39c3325af96d019b4925419eb",
// "gitTreeState": "clean",
// "buildDate": "2020-03-27T22:37:12Z",
// "goVersion": "go1.13.8",
// "compiler": "gc",
// "platform": "linux/amd64"
// }
//
func (e *eks) FetchServerVersion() (ServerVersionInfo, error) {
ver, err := e.fetchServerVersion()
return ver, err
}
func (e *eks) fetchServerVersion() (ServerVersionInfo, error) {
ep := e.cfg.ClusterAPIServerEndpoint + "/version"
e.cfg.Logger.Info("fetching version", zap.String("url", ep))
d, err := httputil.ReadInsecure(e.cfg.Logger, ioutil.Discard, ep)
if err != nil {
return ServerVersionInfo{}, nil
}
return parseVersion(e.cfg.Logger, d)
}
var regex = regexp.MustCompile("[^0-9]+")
func parseVersion(lg *zap.Logger, d []byte) (ServerVersionInfo, error) {
var ver ServerVersionInfo
err := json.NewDecoder(bytes.NewReader(d)).Decode(&ver)
if err != nil {
lg.Warn("failed to fetch version", zap.Error(err))
return ServerVersionInfo{}, err
}
ver.VersionValue, _ = strconv.ParseFloat(ver.Major, 64)
fv, err := strconv.ParseFloat(regex.ReplaceAllString(ver.Minor, ""), 64)
if err != nil {
lg.Warn("failed to parse version", zap.String("ver", fmt.Sprintf("%+v", ver)), zap.Error(err))
return ServerVersionInfo{}, err
}
ver.VersionValue += (fv * 0.01)
lg.Info("fetched version", zap.String("version", fmt.Sprintf("%+v", ver)))
return ver, nil
}
func (e *eks) FetchSupportedAPIGroupVersions() (float64, map[string]struct{}, error) {
vv, m, err := e.fetchSupportedAPIGroupVersions()
return vv, m, err
}
func (e *eks) fetchSupportedAPIGroupVersions() (float64, map[string]struct{}, error) {
if len(e.clients) == 0 {
return 0.0, nil, errors.New("nil client")
}
ver, err := e.fetchServerVersion()
if err != nil {
return 0.0, nil, fmt.Errorf("failed to check api-resources because version check failed (%v)", err)
}
vv := ver.VersionValue
dc := e.getClient().Discovery()
e.cfg.Logger.Info("listing supported api-resources from kube-apiserver", zap.Float64("version-value", vv))
groupList, err := dc.ServerGroups() // returns the supported groups
if err != nil {
return vv, nil, fmt.Errorf("failed to get server groups (%v)", err)
}
apiVersions := metav1.ExtractGroupVersions(groupList)
m := make(map[string]struct{})
for _, k := range apiVersions {
m[k] = struct{}{}
}
return vv, m, nil
}
func (e *eks) ListNamespaces(batchLimit int64, batchInterval time.Duration) ([]v1.Namespace, error) {
ns, err := e.listNamespaces(batchLimit, batchInterval)
return ns, err
}
func (e *eks) listNamespaces(batchLimit int64, batchInterval time.Duration) (ns []v1.Namespace, err error) {
rs := &v1.NamespaceList{ListMeta: metav1.ListMeta{Continue: ""}}
for {
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
rs, err = e.getClient().CoreV1().Namespaces().List(ctx, metav1.ListOptions{Limit: batchLimit, Continue: rs.Continue})
cancel()
if err != nil {
return nil, err
}
ns = append(ns, rs.Items...)
remained := int64Value(rs.RemainingItemCount)
e.cfg.Logger.Info("listing namespace",
zap.Int64("batch-limit", batchLimit),
zap.Int64("remained", remained),
zap.String("continue", rs.Continue),
zap.Duration("batch-interval", batchInterval),
zap.Int("items", len(rs.Items)),
)
if rs.Continue == "" {
break
}
time.Sleep(batchInterval)
}
return ns, err
}
func (e *eks) ListNodes(batchLimit int64, batchInterval time.Duration) ([]v1.Node, error) {
ns, err := e.listNodes(batchLimit, batchInterval)
return ns, err
}
func (e *eks) listNodes(batchLimit int64, batchInterval time.Duration) (nodes []v1.Node, err error) {
rs := &v1.NodeList{ListMeta: metav1.ListMeta{Continue: ""}}
for {
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
rs, err = e.getClient().CoreV1().Nodes().List(ctx, metav1.ListOptions{Limit: batchLimit, Continue: rs.Continue})
cancel()
if err != nil {
return nil, err
}
nodes = append(nodes, rs.Items...)
remained := int64Value(rs.RemainingItemCount)
e.cfg.Logger.Info("listing nodes",
zap.Int64("batch-limit", batchLimit),
zap.Int64("remained", remained),
zap.String("continue", rs.Continue),
zap.Duration("batch-interval", batchInterval),
zap.Int("items", len(rs.Items)),
)
if rs.Continue == "" {
break
}
time.Sleep(batchInterval)
}
return nodes, err
}
func (e *eks) ListCSRs(batchLimit int64, batchInterval time.Duration) ([]certificatesv1beta1.CertificateSigningRequest, error) {
ns, err := e.listCSRs(batchLimit, batchInterval)
return ns, err
}
func (e *eks) listCSRs(batchLimit int64, batchInterval time.Duration) (csrs []certificatesv1beta1.CertificateSigningRequest, err error) {
rs := &certificatesv1beta1.CertificateSigningRequestList{ListMeta: metav1.ListMeta{Continue: ""}}
for {
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
rs, err = e.getClient().
CertificatesV1beta1().
CertificateSigningRequests().
List(ctx, metav1.ListOptions{Limit: batchLimit, Continue: rs.Continue})
cancel()
if err != nil {
return nil, err
}
csrs = append(csrs, rs.Items...)
remained := int64Value(rs.RemainingItemCount)
e.cfg.Logger.Info("listing csrs",
zap.Int64("batch-limit", batchLimit),
zap.Int64("remained", remained),
zap.String("continue", rs.Continue),
zap.Duration("batch-interval", batchInterval),
zap.Int("items", len(rs.Items)),
)
if rs.Continue == "" {
break
}
time.Sleep(batchInterval)
}
return csrs, err
}
func (e *eks) ListPods(namespace string, batchLimit int64, batchInterval time.Duration) ([]v1.Pod, error) {
ns, err := e.listPods(namespace, batchLimit, batchInterval)
return ns, err
}
func (e *eks) listPods(namespace string, batchLimit int64, batchInterval time.Duration) (pods []v1.Pod, err error) {
rs := &v1.PodList{ListMeta: metav1.ListMeta{Continue: ""}}
for {
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
rs, err = e.getClient().CoreV1().Pods(namespace).List(ctx, metav1.ListOptions{Limit: batchLimit, Continue: rs.Continue})
cancel()
if err != nil {
return nil, err
}
pods = append(pods, rs.Items...)
remained := int64Value(rs.RemainingItemCount)
e.cfg.Logger.Info("listing pods",
zap.String("namespace", namespace),
zap.Int64("batch-limit", batchLimit),
zap.Int64("remained", remained),
zap.String("continue", rs.Continue),
zap.Duration("batch-interval", batchInterval),
zap.Int("items", len(rs.Items)),
)
if rs.Continue == "" {
break
}
time.Sleep(batchInterval)
}
return pods, err
}
func (e *eks) ListConfigMaps(namespace string, batchLimit int64, batchInterval time.Duration) ([]v1.ConfigMap, error) {
ns, err := e.listConfigMaps(namespace, batchLimit, batchInterval)
return ns, err
}
func (e *eks) listConfigMaps(namespace string, batchLimit int64, batchInterval time.Duration) (configMaps []v1.ConfigMap, err error) {
rs := &v1.ConfigMapList{ListMeta: metav1.ListMeta{Continue: ""}}
for {
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
rs, err = e.getClient().CoreV1().ConfigMaps(namespace).List(ctx, metav1.ListOptions{Limit: batchLimit, Continue: rs.Continue})
cancel()
if err != nil {
return nil, err
}
configMaps = append(configMaps, rs.Items...)
remained := int64Value(rs.RemainingItemCount)
e.cfg.Logger.Info("listing configmaps",
zap.String("namespace", namespace),
zap.Int64("batch-limit", batchLimit),
zap.Int64("remained", remained),
zap.String("continue", rs.Continue),
zap.Duration("batch-interval", batchInterval),
zap.Int("items", len(rs.Items)),
)
if rs.Continue == "" {
break
}
time.Sleep(batchInterval)
}
return configMaps, err
}
func (e *eks) ListSecrets(namespace string, batchLimit int64, batchInterval time.Duration) ([]v1.Secret, error) {
ss, err := e.listSecrets(namespace, batchLimit, batchInterval)
return ss, err
}
func (e *eks) listSecrets(namespace string, batchLimit int64, batchInterval time.Duration) (ss []v1.Secret, err error) {
rs := &v1.SecretList{ListMeta: metav1.ListMeta{Continue: ""}}
for {
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
rs, err = e.getClient().CoreV1().Secrets(namespace).List(ctx, metav1.ListOptions{Limit: batchLimit, Continue: rs.Continue})
cancel()
if err != nil {
return nil, err
}
ss = append(ss, rs.Items...)
remained := int64Value(rs.RemainingItemCount)
e.cfg.Logger.Info("listing secret",
zap.Int64("batch-limit", batchLimit),