vendor/k8s.io/kubernetes/pkg/kubectl/cmd/logs/logs.go - cloudstack-kubernetes-provider - Git at Google

 /*
 Copyright 2014 The Kubernetes Authors.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

 package logs

 import (
 	"errors"
 	"fmt"
 	"io"
 	"os"
 	"time"

 	"github.com/spf13/cobra"

 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/cli-runtime/pkg/genericclioptions"
 	"k8s.io/client-go/rest"
 	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
 	"k8s.io/kubernetes/pkg/kubectl/polymorphichelpers"
 	"k8s.io/kubernetes/pkg/kubectl/scheme"
 	"k8s.io/kubernetes/pkg/kubectl/util"
 	"k8s.io/kubernetes/pkg/kubectl/util/i18n"
 	"k8s.io/kubernetes/pkg/kubectl/util/templates"
 )

 const (
 	logsUsageStr = "logs [-f] [-p] (POD | TYPE/NAME) [-c CONTAINER]"
 )

 var (
 	logsExample = templates.Examples(i18n.T(`
 		# Return snapshot logs from pod nginx with only one container
 		kubectl logs nginx

 		# Return snapshot logs from pod nginx with multi containers
 		kubectl logs nginx --all-containers=true

 		# Return snapshot logs from all containers in pods defined by label app=nginx
 		kubectl logs -lapp=nginx --all-containers=true

 		# Return snapshot of previous terminated ruby container logs from pod web-1
 		kubectl logs -p -c ruby web-1

 		# Begin streaming the logs of the ruby container in pod web-1
 		kubectl logs -f -c ruby web-1

 		# Display only the most recent 20 lines of output in pod nginx
 		kubectl logs --tail=20 nginx

 		# Show all logs from pod nginx written in the last hour
 		kubectl logs --since=1h nginx

 		# Return snapshot logs from first container of a job named hello
 		kubectl logs job/hello

 		# Return snapshot logs from container nginx-1 of a deployment named nginx
 		kubectl logs deployment/nginx -c nginx-1`))

 	selectorTail    int64 = 10
 	logsUsageErrStr       = fmt.Sprintf("expected '%s'.\nPOD or TYPE/NAME is a required argument for the logs command", logsUsageStr)
 )

 const (
 	defaultPodLogsTimeout = 20 * time.Second
 )

 type LogsOptions struct {
 	Namespace     string
 	ResourceArg   string
 	AllContainers bool
 	Options       runtime.Object
 	Resources     []string

 	ConsumeRequestFn func(*rest.Request, io.Writer) error

 	// PodLogOptions
 	SinceTime    string
 	SinceSeconds time.Duration
 	Follow       bool
 	Previous     bool
 	Timestamps   bool
 	LimitBytes   int64
 	Tail         int64
 	Container    string

 	// whether or not a container name was given via --container
 	ContainerNameSpecified bool
 	Selector               string

 	Object           runtime.Object
 	GetPodTimeout    time.Duration
 	RESTClientGetter genericclioptions.RESTClientGetter
 	LogsForObject    polymorphichelpers.LogsForObjectFunc

 	genericclioptions.IOStreams
 }

 func NewLogsOptions(streams genericclioptions.IOStreams, allContainers bool) *LogsOptions {
 	return &LogsOptions{
 		IOStreams:     streams,
 		AllContainers: allContainers,
 		Tail:          -1,
 	}
 }

 // NewCmdLogs creates a new pod logs command
 func NewCmdLogs(f cmdutil.Factory, streams genericclioptions.IOStreams) *cobra.Command {
 	o := NewLogsOptions(streams, false)

 	cmd := &cobra.Command{
 		Use:                   logsUsageStr,
 		DisableFlagsInUseLine: true,
 		Short:                 i18n.T("Print the logs for a container in a pod"),
 		Long:                  "Print the logs for a container in a pod or specified resource. If the pod has only one container, the container name is optional.",
 		Example:               logsExample,
 		PreRun: func(cmd *cobra.Command, args []string) {
 			if len(os.Args) > 1 && os.Args[1] == "log" {
 				fmt.Fprintf(o.ErrOut, "%s is DEPRECATED and will be removed in a future version. Use %s instead.\n", "log", "logs")
 			}
 		},
 		Run: func(cmd *cobra.Command, args []string) {
 			cmdutil.CheckErr(o.Complete(f, cmd, args))
 			cmdutil.CheckErr(o.Validate())
 			cmdutil.CheckErr(o.RunLogs())
 		},
 		Aliases: []string{"log"},
 	}
 	cmd.Flags().BoolVar(&o.AllContainers, "all-containers", o.AllContainers, "Get all containers's logs in the pod(s).")
 	cmd.Flags().BoolVarP(&o.Follow, "follow", "f", o.Follow, "Specify if the logs should be streamed.")
 	cmd.Flags().BoolVar(&o.Timestamps, "timestamps", o.Timestamps, "Include timestamps on each line in the log output")
 	cmd.Flags().Int64Var(&o.LimitBytes, "limit-bytes", o.LimitBytes, "Maximum bytes of logs to return. Defaults to no limit.")
 	cmd.Flags().BoolVarP(&o.Previous, "previous", "p", o.Previous, "If true, print the logs for the previous instance of the container in a pod if it exists.")
 	cmd.Flags().Int64Var(&o.Tail, "tail", o.Tail, "Lines of recent log file to display. Defaults to -1 with no selector, showing all log lines otherwise 10, if a selector is provided.")
 	cmd.Flags().StringVar(&o.SinceTime, "since-time", o.SinceTime, i18n.T("Only return logs after a specific date (RFC3339). Defaults to all logs. Only one of since-time / since may be used."))
 	cmd.Flags().DurationVar(&o.SinceSeconds, "since", o.SinceSeconds, "Only return logs newer than a relative duration like 5s, 2m, or 3h. Defaults to all logs. Only one of since-time / since may be used.")
 	cmd.Flags().StringVarP(&o.Container, "container", "c", o.Container, "Print the logs of this container")
 	cmdutil.AddPodRunningTimeoutFlag(cmd, defaultPodLogsTimeout)
 	cmd.Flags().StringVarP(&o.Selector, "selector", "l", o.Selector, "Selector (label query) to filter on.")
 	return cmd
 }

 func (o *LogsOptions) ToLogOptions() (*corev1.PodLogOptions, error) {
 	logOptions := &corev1.PodLogOptions{
 		Container:  o.Container,
 		Follow:     o.Follow,
 		Previous:   o.Previous,
 		Timestamps: o.Timestamps,
 	}

 	if len(o.SinceTime) > 0 {
 		t, err := util.ParseRFC3339(o.SinceTime, metav1.Now)
 		if err != nil {
 			return nil, err
 		}

 		logOptions.SinceTime = &t
 	}

 	if o.LimitBytes != 0 {
 		logOptions.LimitBytes = &o.LimitBytes
 	}

 	if o.SinceSeconds != 0 {
 		// round up to the nearest second
 		sec := int64(o.SinceSeconds.Round(time.Second).Seconds())
 		logOptions.SinceSeconds = &sec
 	}

 	if len(o.Selector) > 0 && o.Tail == -1 {
 		logOptions.TailLines = &selectorTail
 	} else if o.Tail != -1 {
 		logOptions.TailLines = &o.Tail
 	}

 	return logOptions, nil
 }

 func (o *LogsOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error {
 	o.ContainerNameSpecified = cmd.Flag("container").Changed
 	o.Resources = args

 	switch len(args) {
 	case 0:
 		if len(o.Selector) == 0 {
 			return cmdutil.UsageErrorf(cmd, "%s", logsUsageErrStr)
 		}
 	case 1:
 		o.ResourceArg = args[0]
 		if len(o.Selector) != 0 {
 			return cmdutil.UsageErrorf(cmd, "only a selector (-l) or a POD name is allowed")
 		}
 	case 2:
 		o.ResourceArg = args[0]
 		o.Container = args[1]
 	default:
 		return cmdutil.UsageErrorf(cmd, "%s", logsUsageErrStr)
 	}
 	var err error
 	o.Namespace, _, err = f.ToRawKubeConfigLoader().Namespace()
 	if err != nil {
 		return err
 	}

 	o.ConsumeRequestFn = DefaultConsumeRequest

 	o.GetPodTimeout, err = cmdutil.GetPodRunningTimeoutFlag(cmd)
 	if err != nil {
 		return err
 	}

 	o.Options, err = o.ToLogOptions()
 	if err != nil {
 		return err
 	}

 	o.RESTClientGetter = f
 	o.LogsForObject = polymorphichelpers.LogsForObjectFn

 	if o.Object == nil {
 		builder := f.NewBuilder().
 			WithScheme(scheme.Scheme, scheme.Scheme.PrioritizedVersionsAllGroups()...).
 			NamespaceParam(o.Namespace).DefaultNamespace().
 			SingleResourceType()
 		if o.ResourceArg != "" {
 			builder.ResourceNames("pods", o.ResourceArg)
 		}
 		if o.Selector != "" {
 			builder.ResourceTypes("pods").LabelSelectorParam(o.Selector)
 		}
 		infos, err := builder.Do().Infos()
 		if err != nil {
 			return err
 		}
 		if o.Selector == "" && len(infos) != 1 {
 			return errors.New("expected a resource")
 		}
 		o.Object = infos[0].Object
 	}

 	return nil
 }

 func (o LogsOptions) Validate() error {
 	if o.Follow && len(o.Selector) > 0 {
 		return fmt.Errorf("only one of follow (-f) or selector (-l) is allowed")
 	}

 	if len(o.SinceTime) > 0 && o.SinceSeconds != 0 {
 		return fmt.Errorf("at most one of `sinceTime` or `sinceSeconds` may be specified")
 	}

 	logsOptions, ok := o.Options.(*corev1.PodLogOptions)
 	if !ok {
 		return errors.New("unexpected logs options object")
 	}
 	if o.AllContainers && len(logsOptions.Container) > 0 {
 		return fmt.Errorf("--all-containers=true should not be specified with container name %s", logsOptions.Container)
 	}

 	if o.ContainerNameSpecified && len(o.Resources) == 2 {
 		return fmt.Errorf("only one of -c or an inline [CONTAINER] arg is allowed")
 	}

 	if o.LimitBytes < 0 {
 		return fmt.Errorf("--limit-bytes must be greater than 0")
 	}

 	if logsOptions.SinceSeconds != nil && *logsOptions.SinceSeconds < int64(0) {
 		return fmt.Errorf("--since must be greater than 0")
 	}

 	if logsOptions.TailLines != nil && *logsOptions.TailLines < 0 {
 		return fmt.Errorf("TailLines must be greater than or equal to 0")
 	}

 	return nil
 }

 // RunLogs retrieves a pod log
 func (o LogsOptions) RunLogs() error {
 	requests, err := o.LogsForObject(o.RESTClientGetter, o.Object, o.Options, o.GetPodTimeout, o.AllContainers)
 	if err != nil {
 		return err
 	}

 	for _, request := range requests {
 		if err := o.ConsumeRequestFn(request, o.Out); err != nil {
 			return err
 		}
 	}

 	return nil
 }

 func DefaultConsumeRequest(request *rest.Request, out io.Writer) error {
 	readCloser, err := request.Stream()
 	if err != nil {
 		return err
 	}
 	defer readCloser.Close()

 	_, err = io.Copy(out, readCloser)
 	return err
 }
	/*
	Copyright 2014 The Kubernetes Authors.

	Licensed under the Apache License, Version 2.0 (the "License");
	you may not use this file except in compliance with the License.
	You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

	Unless required by applicable law or agreed to in writing, software
	distributed under the License is distributed on an "AS IS" BASIS,
	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	See the License for the specific language governing permissions and
	limitations under the License.
	*/

	package logs

	import (
	"errors"
	"fmt"
	"io"
	"os"
	"time"

	"github.com/spf13/cobra"

	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/cli-runtime/pkg/genericclioptions"
	"k8s.io/client-go/rest"
	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
	"k8s.io/kubernetes/pkg/kubectl/polymorphichelpers"
	"k8s.io/kubernetes/pkg/kubectl/scheme"
	"k8s.io/kubernetes/pkg/kubectl/util"
	"k8s.io/kubernetes/pkg/kubectl/util/i18n"
	"k8s.io/kubernetes/pkg/kubectl/util/templates"
	)

	const (
	logsUsageStr = "logs [-f] [-p] (POD \| TYPE/NAME) [-c CONTAINER]"
	)

	var (
	logsExample = templates.Examples(i18n.T(`
	# Return snapshot logs from pod nginx with only one container
	kubectl logs nginx

	# Return snapshot logs from pod nginx with multi containers
	kubectl logs nginx --all-containers=true

	# Return snapshot logs from all containers in pods defined by label app=nginx
	kubectl logs -lapp=nginx --all-containers=true

	# Return snapshot of previous terminated ruby container logs from pod web-1
	kubectl logs -p -c ruby web-1

	# Begin streaming the logs of the ruby container in pod web-1
	kubectl logs -f -c ruby web-1

	# Display only the most recent 20 lines of output in pod nginx
	kubectl logs --tail=20 nginx

	# Show all logs from pod nginx written in the last hour
	kubectl logs --since=1h nginx

	# Return snapshot logs from first container of a job named hello
	kubectl logs job/hello

	# Return snapshot logs from container nginx-1 of a deployment named nginx
	kubectl logs deployment/nginx -c nginx-1`))

	selectorTail int64 = 10
	logsUsageErrStr = fmt.Sprintf("expected '%s'.\nPOD or TYPE/NAME is a required argument for the logs command", logsUsageStr)
	)

	const (
	defaultPodLogsTimeout = 20 * time.Second
	)

	type LogsOptions struct {
	Namespace string
	ResourceArg string
	AllContainers bool
	Options runtime.Object
	Resources []string

	ConsumeRequestFn func(*rest.Request, io.Writer) error

	// PodLogOptions
	SinceTime string
	SinceSeconds time.Duration
	Follow bool
	Previous bool
	Timestamps bool
	LimitBytes int64
	Tail int64
	Container string

	// whether or not a container name was given via --container
	ContainerNameSpecified bool
	Selector string

	Object runtime.Object
	GetPodTimeout time.Duration
	RESTClientGetter genericclioptions.RESTClientGetter
	LogsForObject polymorphichelpers.LogsForObjectFunc

	genericclioptions.IOStreams
	}

	func NewLogsOptions(streams genericclioptions.IOStreams, allContainers bool) *LogsOptions {
	return &LogsOptions{
	IOStreams: streams,
	AllContainers: allContainers,
	Tail: -1,
	}
	}

	// NewCmdLogs creates a new pod logs command
	func NewCmdLogs(f cmdutil.Factory, streams genericclioptions.IOStreams) *cobra.Command {
	o := NewLogsOptions(streams, false)

	cmd := &cobra.Command{
	Use: logsUsageStr,
	DisableFlagsInUseLine: true,
	Short: i18n.T("Print the logs for a container in a pod"),
	Long: "Print the logs for a container in a pod or specified resource. If the pod has only one container, the container name is optional.",
	Example: logsExample,
	PreRun: func(cmd *cobra.Command, args []string) {
	if len(os.Args) > 1 && os.Args[1] == "log" {
	fmt.Fprintf(o.ErrOut, "%s is DEPRECATED and will be removed in a future version. Use %s instead.\n", "log", "logs")
	}
	},
	Run: func(cmd *cobra.Command, args []string) {
	cmdutil.CheckErr(o.Complete(f, cmd, args))
	cmdutil.CheckErr(o.Validate())
	cmdutil.CheckErr(o.RunLogs())
	},
	Aliases: []string{"log"},
	}
	cmd.Flags().BoolVar(&o.AllContainers, "all-containers", o.AllContainers, "Get all containers's logs in the pod(s).")
	cmd.Flags().BoolVarP(&o.Follow, "follow", "f", o.Follow, "Specify if the logs should be streamed.")
	cmd.Flags().BoolVar(&o.Timestamps, "timestamps", o.Timestamps, "Include timestamps on each line in the log output")
	cmd.Flags().Int64Var(&o.LimitBytes, "limit-bytes", o.LimitBytes, "Maximum bytes of logs to return. Defaults to no limit.")
	cmd.Flags().BoolVarP(&o.Previous, "previous", "p", o.Previous, "If true, print the logs for the previous instance of the container in a pod if it exists.")
	cmd.Flags().Int64Var(&o.Tail, "tail", o.Tail, "Lines of recent log file to display. Defaults to -1 with no selector, showing all log lines otherwise 10, if a selector is provided.")
	cmd.Flags().StringVar(&o.SinceTime, "since-time", o.SinceTime, i18n.T("Only return logs after a specific date (RFC3339). Defaults to all logs. Only one of since-time / since may be used."))
	cmd.Flags().DurationVar(&o.SinceSeconds, "since", o.SinceSeconds, "Only return logs newer than a relative duration like 5s, 2m, or 3h. Defaults to all logs. Only one of since-time / since may be used.")
	cmd.Flags().StringVarP(&o.Container, "container", "c", o.Container, "Print the logs of this container")
	cmdutil.AddPodRunningTimeoutFlag(cmd, defaultPodLogsTimeout)
	cmd.Flags().StringVarP(&o.Selector, "selector", "l", o.Selector, "Selector (label query) to filter on.")
	return cmd
	}

	func (o LogsOptions) ToLogOptions() (corev1.PodLogOptions, error) {
	logOptions := &corev1.PodLogOptions{
	Container: o.Container,
	Follow: o.Follow,
	Previous: o.Previous,
	Timestamps: o.Timestamps,
	}

	if len(o.SinceTime) > 0 {
	t, err := util.ParseRFC3339(o.SinceTime, metav1.Now)
	if err != nil {
	return nil, err
	}

	logOptions.SinceTime = &t
	}

	if o.LimitBytes != 0 {
	logOptions.LimitBytes = &o.LimitBytes
	}

	if o.SinceSeconds != 0 {
	// round up to the nearest second
	sec := int64(o.SinceSeconds.Round(time.Second).Seconds())
	logOptions.SinceSeconds = &sec
	}

	if len(o.Selector) > 0 && o.Tail == -1 {
	logOptions.TailLines = &selectorTail
	} else if o.Tail != -1 {
	logOptions.TailLines = &o.Tail
	}

	return logOptions, nil
	}

	func (o LogsOptions) Complete(f cmdutil.Factory, cmd cobra.Command, args []string) error {
	o.ContainerNameSpecified = cmd.Flag("container").Changed
	o.Resources = args

	switch len(args) {
	case 0:
	if len(o.Selector) == 0 {
	return cmdutil.UsageErrorf(cmd, "%s", logsUsageErrStr)
	}
	case 1:
	o.ResourceArg = args[0]
	if len(o.Selector) != 0 {
	return cmdutil.UsageErrorf(cmd, "only a selector (-l) or a POD name is allowed")
	}
	case 2:
	o.ResourceArg = args[0]
	o.Container = args[1]
	default:
	return cmdutil.UsageErrorf(cmd, "%s", logsUsageErrStr)
	}
	var err error
	o.Namespace, _, err = f.ToRawKubeConfigLoader().Namespace()
	if err != nil {
	return err
	}

	o.ConsumeRequestFn = DefaultConsumeRequest

	o.GetPodTimeout, err = cmdutil.GetPodRunningTimeoutFlag(cmd)
	if err != nil {
	return err
	}

	o.Options, err = o.ToLogOptions()
	if err != nil {
	return err
	}

	o.RESTClientGetter = f
	o.LogsForObject = polymorphichelpers.LogsForObjectFn

	if o.Object == nil {
	builder := f.NewBuilder().
	WithScheme(scheme.Scheme, scheme.Scheme.PrioritizedVersionsAllGroups()...).
	NamespaceParam(o.Namespace).DefaultNamespace().
	SingleResourceType()
	if o.ResourceArg != "" {
	builder.ResourceNames("pods", o.ResourceArg)
	}
	if o.Selector != "" {
	builder.ResourceTypes("pods").LabelSelectorParam(o.Selector)
	}
	infos, err := builder.Do().Infos()
	if err != nil {
	return err
	}
	if o.Selector == "" && len(infos) != 1 {
	return errors.New("expected a resource")
	}
	o.Object = infos[0].Object
	}

	return nil
	}

	func (o LogsOptions) Validate() error {
	if o.Follow && len(o.Selector) > 0 {
	return fmt.Errorf("only one of follow (-f) or selector (-l) is allowed")
	}

	if len(o.SinceTime) > 0 && o.SinceSeconds != 0 {
	return fmt.Errorf("at most one of `sinceTime` or `sinceSeconds` may be specified")
	}

	logsOptions, ok := o.Options.(*corev1.PodLogOptions)
	if !ok {
	return errors.New("unexpected logs options object")
	}
	if o.AllContainers && len(logsOptions.Container) > 0 {
	return fmt.Errorf("--all-containers=true should not be specified with container name %s", logsOptions.Container)
	}

	if o.ContainerNameSpecified && len(o.Resources) == 2 {
	return fmt.Errorf("only one of -c or an inline [CONTAINER] arg is allowed")
	}

	if o.LimitBytes < 0 {
	return fmt.Errorf("--limit-bytes must be greater than 0")
	}

	if logsOptions.SinceSeconds != nil && *logsOptions.SinceSeconds < int64(0) {
	return fmt.Errorf("--since must be greater than 0")
	}

	if logsOptions.TailLines != nil && *logsOptions.TailLines < 0 {
	return fmt.Errorf("TailLines must be greater than or equal to 0")
	}

	return nil
	}

	// RunLogs retrieves a pod log
	func (o LogsOptions) RunLogs() error {
	requests, err := o.LogsForObject(o.RESTClientGetter, o.Object, o.Options, o.GetPodTimeout, o.AllContainers)
	if err != nil {
	return err
	}

	for _, request := range requests {
	if err := o.ConsumeRequestFn(request, o.Out); err != nil {
	return err
	}
	}

	return nil
	}

	func DefaultConsumeRequest(request *rest.Request, out io.Writer) error {
	readCloser, err := request.Stream()
	if err != nil {
	return err
	}
	defer readCloser.Close()

	_, err = io.Copy(out, readCloser)
	return err
	}