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startup.go
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startup.go
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package startup
import (
"errors"
"fmt"
"github.com/datreeio/admission-webhook-datree/pkg/openshiftService"
"net/http"
"os"
"time"
"github.com/datreeio/admission-webhook-datree/pkg/clients"
"github.com/datreeio/admission-webhook-datree/pkg/leaderElection"
servicestate "github.com/datreeio/admission-webhook-datree/pkg/serviceState"
v1 "k8s.io/client-go/kubernetes/typed/coordination/v1"
"github.com/datreeio/admission-webhook-datree/pkg/k8sClient"
"github.com/datreeio/admission-webhook-datree/pkg/config"
"github.com/datreeio/admission-webhook-datree/pkg/logger"
"github.com/datreeio/admission-webhook-datree/pkg/services"
"github.com/robfig/cron/v3"
"github.com/datreeio/admission-webhook-datree/pkg/controllers"
"github.com/datreeio/admission-webhook-datree/pkg/errorReporter"
"github.com/datreeio/admission-webhook-datree/pkg/k8sMetadataUtil"
"github.com/datreeio/admission-webhook-datree/pkg/server"
"github.com/datreeio/datree/pkg/deploymentConfig"
"github.com/datreeio/datree/pkg/networkValidator"
"github.com/datreeio/datree/pkg/utils"
)
const DefaultErrExitCode = 1
// Start this function was previously the main function in main.go
func Start() {
port := os.Getenv("LISTEN_PORT")
if port == "" {
port = "8443"
}
state := servicestate.New()
basicNetworkValidator := networkValidator.NewNetworkValidator()
basicCliClient := clients.NewCliServiceClient(deploymentConfig.URL, basicNetworkValidator, state)
errorReporter := errorReporter.NewErrorReporter(basicCliClient, state)
logger := logger.New(state.GetLogLevel(), errorReporter)
defer func() {
if panicErr := recover(); panicErr != nil {
errorReporter.ReportPanicError(panicErr)
logger.LogError(fmt.Sprintf("Datree Webhook failed to start due to Unexpected error: %s\n", utils.ParseErrorToString(panicErr)))
os.Exit(DefaultErrExitCode)
}
}()
openshiftServiceInstance, err := openshiftService.NewOpenshiftService()
if err != nil {
panic(err) // should never happen
}
k8sClientInstance, err := k8sClient.NewK8sClient()
var leaderElectionLeaseGetter v1.LeasesGetter = nil
if err == nil && k8sClientInstance != nil {
leaderElectionLeaseGetter = k8sClientInstance.CoordinationV1()
}
leaderElectionInstance := leaderElection.New(&leaderElectionLeaseGetter, logger)
k8sMetadataUtilInstance := k8sMetadataUtil.NewK8sMetadataUtil(k8sClientInstance, err, leaderElectionInstance, logger)
k8sMetadataUtilInstance.InitK8sMetadataUtil(state)
clusterUuid, err := k8sMetadataUtilInstance.GetClusterUuid()
if err != nil {
formattedErrorMessage := fmt.Sprintf("couldn't get cluster uuid %s", err)
errorReporter.ReportUnexpectedError(errors.New(formattedErrorMessage))
logger.LogInfo(formattedErrorMessage)
}
k8sVersion, err := k8sMetadataUtilInstance.GetClusterK8sVersion()
if err != nil {
formattedErrorMessage := fmt.Sprintf("couldn't get k8s version %s", err)
errorReporter.ReportUnexpectedError(errors.New(formattedErrorMessage))
logger.LogInfo(formattedErrorMessage)
}
state.SetClusterUuid(clusterUuid)
state.SetK8sVersion(k8sVersion)
err = server.InitSkipList()
if err != nil {
logger.LogError(fmt.Sprintf("Failed init skip list: %s \n", err.Error()))
}
certPath, keyPath, err := server.ValidateCertificate()
if err != nil {
logger.PanicLevel(fmt.Sprintf("Failed to validate certificate: %s \n", err.Error()))
}
validationController := controllers.NewValidationController(basicCliClient, state, errorReporter, k8sMetadataUtilInstance, &logger, openshiftServiceInstance)
healthController := controllers.NewHealthController()
// set routes
http.HandleFunc("/validate", validationController.Validate)
http.HandleFunc("/health", healthController.Health)
http.HandleFunc("/ready", healthController.Ready)
// use validation service to send metadata in batch
initMetadataLogsCronjob(validationController.ValidationService)
logger.LogInfo(fmt.Sprintf("server starting in webhook-version: %s", config.WebhookVersion))
// start server
if err := http.ListenAndServeTLS(":"+port, certPath, keyPath, nil); err != nil {
err = http.ListenAndServe(":"+port, nil)
if err != nil {
logger.LogError(fmt.Sprintf("Failed to start http server: %s \n", err.Error()))
}
}
}
func initMetadataLogsCronjob(validationService *services.ValidationService) {
cornJob := cron.New(cron.WithLocation(time.UTC))
_, err := cornJob.AddFunc("@every 1h", validationService.SendMetadataInBatch)
if err != nil {
validationService.Logger.LogError(fmt.Sprintf("Metadata cronjon failed to be added, err: %s \n", err.Error()))
}
cornJob.Start()
}