/
common.go
117 lines (102 loc) · 4.09 KB
/
common.go
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package cmd
import (
"context"
"errors"
"fmt"
"path"
"regexp"
"time"
"github.com/kubeshark/kubeshark/config"
"github.com/kubeshark/kubeshark/errormessage"
"github.com/kubeshark/kubeshark/internal/connect"
"github.com/kubeshark/kubeshark/kubernetes"
"github.com/kubeshark/kubeshark/misc"
"github.com/kubeshark/kubeshark/misc/fsUtils"
"github.com/rs/zerolog/log"
)
func startProxyReportErrorIfAny(kubernetesProvider *kubernetes.Provider, ctx context.Context, serviceName string, podName string, proxyPortLabel string, srcPort uint16, dstPort uint16, healthCheck string) {
httpServer, err := kubernetes.StartProxy(kubernetesProvider, config.Config.Tap.Proxy.Host, srcPort, config.Config.Tap.Release.Namespace, serviceName)
if err != nil {
log.Error().
Err(errormessage.FormatError(err)).
Msg(fmt.Sprintf("Error occured while running K8s proxy. Try setting different port using --%s", proxyPortLabel))
return
}
connector := connect.NewConnector(kubernetes.GetProxyOnPort(srcPort), connect.DefaultRetries, connect.DefaultTimeout)
if err := connector.TestConnection(healthCheck); err != nil {
log.Warn().
Str("service", serviceName).
Msg("Couldn't connect using proxy, stopping proxy and trying to create port-forward...")
if err := httpServer.Shutdown(ctx); err != nil {
log.Error().
Err(errormessage.FormatError(err)).
Msg("Error occurred while stopping proxy.")
}
podRegex, _ := regexp.Compile(podName)
if _, err := kubernetes.NewPortForward(kubernetesProvider, config.Config.Tap.Release.Namespace, podRegex, srcPort, dstPort, ctx); err != nil {
log.Error().
Str("pod-regex", podRegex.String()).
Err(errormessage.FormatError(err)).
Msg(fmt.Sprintf("Error occured while running port forward. Try setting different port using --%s", proxyPortLabel))
return
}
connector = connect.NewConnector(kubernetes.GetProxyOnPort(srcPort), connect.DefaultRetries, connect.DefaultTimeout)
if err := connector.TestConnection(healthCheck); err != nil {
log.Error().
Str("service", serviceName).
Err(errormessage.FormatError(err)).
Msg("Couldn't connect to service.")
return
}
}
}
func getKubernetesProviderForCli(silent bool, dontCheckVersion bool) (*kubernetes.Provider, error) {
kubeConfigPath := config.Config.KubeConfigPath()
kubernetesProvider, err := kubernetes.NewProvider(kubeConfigPath, config.Config.Kube.Context)
if err != nil {
handleKubernetesProviderError(err)
return nil, err
}
if !silent {
log.Info().Str("path", kubeConfigPath).Msg("Using kubeconfig:")
}
if err := kubernetesProvider.ValidateNotProxy(); err != nil {
handleKubernetesProviderError(err)
return nil, err
}
if !dontCheckVersion {
kubernetesVersion, err := kubernetesProvider.GetKubernetesVersion()
if err != nil {
handleKubernetesProviderError(err)
return nil, err
}
if err := kubernetes.ValidateKubernetesVersion(kubernetesVersion); err != nil {
handleKubernetesProviderError(err)
return nil, err
}
}
return kubernetesProvider, nil
}
func handleKubernetesProviderError(err error) {
var clusterBehindProxyErr *kubernetes.ClusterBehindProxyError
if ok := errors.As(err, &clusterBehindProxyErr); ok {
log.Error().Msg(fmt.Sprintf("Cannot establish http-proxy connection to the Kubernetes cluster. If you’re using Lens or similar tool, please run '%s' with regular kubectl config using --%v %v=$HOME/.kube/config flag", misc.Program, config.SetCommandName, config.KubeConfigPathConfigName))
} else {
log.Error().Err(err).Send()
}
}
func finishSelfExecution(kubernetesProvider *kubernetes.Provider) {
removalCtx, cancel := context.WithTimeout(context.Background(), cleanupTimeout)
defer cancel()
dumpLogsIfNeeded(removalCtx, kubernetesProvider)
}
func dumpLogsIfNeeded(ctx context.Context, kubernetesProvider *kubernetes.Provider) {
if !config.Config.DumpLogs {
return
}
dotDir := misc.GetDotFolderPath()
filePath := path.Join(dotDir, fmt.Sprintf("%s_logs_%s.zip", misc.Program, time.Now().Format("2006_01_02__15_04_05")))
if err := fsUtils.DumpLogs(ctx, kubernetesProvider, filePath); err != nil {
log.Error().Err(err).Msg("Failed to dump logs.")
}
}