/
resolver.go
361 lines (294 loc) · 8.66 KB
/
resolver.go
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package config
import (
"context"
"time"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
"k8s.io/client-go/dynamic"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/metadata"
"k8s.io/client-go/rest"
"k8s.io/client-go/util/workqueue"
"github.com/kyverno/policy-reporter-kyverno-plugin/pkg/api"
v1 "github.com/kyverno/policy-reporter-kyverno-plugin/pkg/crd/client/clientset/versioned/typed/kyverno/v1"
"github.com/kyverno/policy-reporter-kyverno-plugin/pkg/crd/client/clientset/versioned/typed/policyreport/v1alpha2"
"github.com/kyverno/policy-reporter-kyverno-plugin/pkg/kyverno"
k8s "github.com/kyverno/policy-reporter-kyverno-plugin/pkg/kyverno/kubernetes"
"github.com/kyverno/policy-reporter-kyverno-plugin/pkg/kyverno/listener"
"github.com/kyverno/policy-reporter-kyverno-plugin/pkg/leaderelection"
"github.com/kyverno/policy-reporter-kyverno-plugin/pkg/policyreport"
prk8s "github.com/kyverno/policy-reporter-kyverno-plugin/pkg/policyreport/kubernetes"
"github.com/kyverno/policy-reporter-kyverno-plugin/pkg/reporting"
rk8s "github.com/kyverno/policy-reporter-kyverno-plugin/pkg/reporting/kubernetes"
"github.com/kyverno/policy-reporter-kyverno-plugin/pkg/secrets"
"github.com/kyverno/policy-reporter-kyverno-plugin/pkg/violation"
vk8s "github.com/kyverno/policy-reporter-kyverno-plugin/pkg/violation/kubernetes"
)
// Resolver manages dependencies
type Resolver struct {
config *Config
clientset *kubernetes.Clientset
k8sConfig *rest.Config
mapper k8s.Mapper
leaderClient *leaderelection.Client
policyStore *kyverno.PolicyStore
policyClient kyverno.PolicyClient
eventClient violation.EventClient
polrClient policyreport.Client
publisher *kyverno.EventPublisher
vPulisher *violation.Publisher
logger *zap.Logger
}
// SecretClient resolver method
func (r *Resolver) SecretClient() (secrets.Client, error) {
clientset, err := r.Clientset()
if err != nil {
zap.L().Error("failed to create secret client, secretRefs can not be resolved", zap.Error(err))
return nil, err
}
return secrets.NewClient(clientset.CoreV1().Secrets(r.config.Namespace)), nil
}
// APIServer resolver method
func (r *Resolver) APIServer(ctx context.Context, synced func() bool) api.Server {
var logger *zap.Logger
if r.config.API.Logging {
logger, _ = r.Logger()
}
authConfig := &r.config.API.BasicAuth
if authConfig.SecretRef != "" {
r.loadSecretRef(ctx, authConfig)
}
var auth *api.BasicAuth
if authConfig.Username != "" && authConfig.Password != "" {
auth = &api.BasicAuth{
Username: authConfig.Username,
Password: authConfig.Password,
}
zap.L().Info("API BasicAuth enabled")
}
return api.NewServer(
r.PolicyStore(),
r.Reporting(),
r.config.API.Port,
synced,
auth,
logger,
)
}
func (r *Resolver) CRDMetadataClient() (metadata.Interface, error) {
client, err := metadata.NewForConfig(r.k8sConfig)
if err != nil {
return nil, err
}
return client, nil
}
// PolicyStore resolver method
func (r *Resolver) PolicyStore() *kyverno.PolicyStore {
if r.policyStore != nil {
return r.policyStore
}
r.policyStore = kyverno.NewPolicyStore()
return r.policyStore
}
// EventPublisher resolver method
func (r *Resolver) EventPublisher() *kyverno.EventPublisher {
if r.publisher != nil {
return r.publisher
}
r.publisher = kyverno.NewEventPublisher()
return r.publisher
}
// EventPublisher resolver method
func (r *Resolver) ViolationPublisher() *violation.Publisher {
if r.vPulisher != nil {
return r.vPulisher
}
r.vPulisher = violation.NewPublisher()
return r.vPulisher
}
// PolicyClient resolver method
func (r *Resolver) PolicyClient() (kyverno.PolicyClient, error) {
if r.policyClient != nil {
return r.policyClient, nil
}
client, err := r.CRDMetadataClient()
if err != nil {
return nil, err
}
queue, err := r.Queue()
if err != nil {
return nil, err
}
policyClient := k8s.NewClient(client, queue)
r.policyClient = policyClient
return policyClient, nil
}
// EventPublisher resolver method
func (r *Resolver) Queue() (*k8s.Queue, error) {
client, err := r.CRDClient()
if err != nil {
return nil, err
}
return k8s.NewQueue(
r.EventPublisher(),
workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "policy-queue"),
client,
dynamic.NewForConfigOrDie(r.k8sConfig),
), nil
}
func (r *Resolver) CRDClient() (v1.KyvernoV1Interface, error) {
client, err := v1.NewForConfig(r.k8sConfig)
if err != nil {
return nil, err
}
return client, nil
}
// EventClient resolver method
func (r *Resolver) Clientset() (*kubernetes.Clientset, error) {
if r.clientset != nil {
return r.clientset, nil
}
clientset, err := kubernetes.NewForConfig(r.k8sConfig)
if err != nil {
return nil, err
}
r.clientset = clientset
return r.clientset, nil
}
// Reporting resolver method
func (r *Resolver) Reporting() reporting.PolicyReportGenerator {
return reporting.NewPolicyReportGenerator(
rk8s.NewPolicyClient(v1.NewForConfigOrDie(r.k8sConfig)),
rk8s.NewReportClient(v1alpha2.NewForConfigOrDie(r.k8sConfig)),
)
}
// LeaderElectionClient resolver method
func (r *Resolver) LeaderElectionClient() (*leaderelection.Client, error) {
if r.leaderClient != nil {
return r.leaderClient, nil
}
clientset, err := r.Clientset()
if err != nil {
return nil, err
}
r.leaderClient = leaderelection.New(
clientset.CoordinationV1(),
r.config.LeaderElection.LockName,
r.config.Namespace,
r.config.LeaderElection.PodName,
time.Duration(r.config.LeaderElection.LeaseDuration)*time.Second,
time.Duration(r.config.LeaderElection.RenewDeadline)*time.Second,
time.Duration(r.config.LeaderElection.RetryPeriod)*time.Second,
r.config.LeaderElection.ReleaseOnCancel,
)
return r.leaderClient, nil
}
// EventClient resolver method
func (r *Resolver) EventClient() (violation.EventClient, error) {
if r.eventClient != nil {
return r.eventClient, nil
}
clientset, err := r.Clientset()
if err != nil {
return nil, err
}
r.eventClient = vk8s.NewClient(clientset, r.ViolationPublisher(), r.PolicyStore(), r.config.BlockReports.EventNamespace)
return r.eventClient, nil
}
// PolicyReportClient resolver method
func (r *Resolver) PolicyReportClient() (policyreport.Client, error) {
if r.polrClient != nil {
return r.polrClient, nil
}
client, err := v1alpha2.NewForConfig(r.k8sConfig)
if err != nil {
return nil, err
}
policyreportClient := prk8s.NewClient(
client,
r.config.BlockReports.Results.MaxPerReport,
r.config.BlockReports.Source,
r.config.BlockReports.Results.KeepOnlyLatest,
)
r.polrClient = policyreportClient
return policyreportClient, nil
}
// Mapper resolver method
func (r *Resolver) Mapper() k8s.Mapper {
if r.mapper != nil {
return r.mapper
}
r.mapper = k8s.NewMapper()
return r.mapper
}
// Logger resolver method
func (r *Resolver) Logger() (*zap.Logger, error) {
if r.logger != nil {
return r.logger, nil
}
encoder := zap.NewProductionEncoderConfig()
if r.config.Logging.Development {
encoder = zap.NewDevelopmentEncoderConfig()
encoder.EncodeTime = zapcore.TimeEncoderOfLayout("2006-01-02 15:04:05")
}
ouput := "json"
if r.config.Logging.Encoding != "json" {
ouput = "console"
encoder.EncodeCaller = nil
}
var sampling *zap.SamplingConfig
if !r.config.Logging.Development {
sampling = &zap.SamplingConfig{
Initial: 100,
Thereafter: 100,
}
}
config := zap.Config{
Level: zap.NewAtomicLevelAt(zapcore.Level(r.config.Logging.LogLevel)),
Development: r.config.Logging.Development,
Sampling: sampling,
Encoding: ouput,
EncoderConfig: encoder,
DisableStacktrace: !r.config.Logging.Development,
OutputPaths: []string{"stderr"},
ErrorOutputPaths: []string{"stderr"},
}
logger, err := config.Build()
if err != nil {
return nil, err
}
r.logger = logger
zap.ReplaceGlobals(logger)
return r.logger, nil
}
// RegisterStoreListener resolver method
func (r *Resolver) RegisterStoreListener() {
r.EventPublisher().RegisterListener(listener.NewStoreListener(r.PolicyStore()))
}
// RegisterMetricsListener resolver method
func (r *Resolver) RegisterMetricsListener() {
r.EventPublisher().RegisterListener(listener.NewPolicyMetricsListener())
}
func (r *Resolver) loadSecretRef(ctx context.Context, auth *BasicAuth) {
client, err := r.SecretClient()
if err != nil {
return
}
values, err := client.Get(ctx, auth.SecretRef)
if err != nil {
zap.L().Error("failed to load basic auth secret", zap.Error(err))
}
if values.Username != "" {
auth.Username = values.Username
}
if values.Password != "" {
auth.Password = values.Password
}
}
// NewResolver constructor function
func NewResolver(config *Config, k8sConfig *rest.Config) Resolver {
return Resolver{
config: config,
k8sConfig: k8sConfig,
}
}