436 lines
11 KiB
Go
436 lines
11 KiB
Go
package view
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import (
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"context"
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"errors"
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"fmt"
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"github.com/derailed/k9s/internal"
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"github.com/derailed/k9s/internal/client"
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"github.com/derailed/k9s/internal/dao"
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"github.com/derailed/k9s/internal/model"
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"github.com/derailed/k9s/internal/render"
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"github.com/derailed/k9s/internal/ui"
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"github.com/fatih/color"
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"github.com/gdamore/tcell/v2"
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"github.com/rs/zerolog/log"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/runtime"
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)
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const (
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windowsOS = "windows"
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powerShell = "powershell"
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osBetaSelector = "beta.kubernetes.io/os"
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osSelector = "kubernetes.io/os"
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)
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// Pod represents a pod viewer.
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type Pod struct {
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ResourceViewer
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}
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// NewPod returns a new viewer.
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func NewPod(gvr client.GVR) ResourceViewer {
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var p Pod
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p.ResourceViewer = NewPortForwardExtender(
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NewImageExtender(
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NewLogsExtender(NewBrowser(gvr), p.logOptions),
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),
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)
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p.AddBindKeysFn(p.bindKeys)
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p.GetTable().SetEnterFn(p.showContainers)
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p.GetTable().SetDecorateFn(p.portForwardIndicator)
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return &p
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}
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func (p *Pod) portForwardIndicator(data *render.TableData) {
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ff := p.App().factory.Forwarders()
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col := data.IndexOfHeader("PF")
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for _, re := range data.RowEvents {
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if ff.IsPodForwarded(re.Row.ID) {
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re.Row.Fields[col] = "[orange::b]Ⓕ"
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}
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}
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decorateCpuMemHeaderRows(p.App(), data)
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}
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func (p *Pod) bindDangerousKeys(aa ui.KeyActions) {
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aa.Add(ui.KeyActions{
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tcell.KeyCtrlK: ui.NewKeyAction("Kill", p.killCmd, true),
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ui.KeyS: ui.NewKeyAction("Shell", p.shellCmd, true),
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ui.KeyA: ui.NewKeyAction("Attach", p.attachCmd, true),
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})
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}
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func (p *Pod) bindKeys(aa ui.KeyActions) {
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if !p.App().Config.K9s.IsReadOnly() {
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p.bindDangerousKeys(aa)
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}
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aa.Add(ui.KeyActions{
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ui.KeyN: ui.NewKeyAction("Show Node", p.showNode, true),
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ui.KeyF: ui.NewKeyAction("Show PortForward", p.showPFCmd, true),
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ui.KeyShiftR: ui.NewKeyAction("Sort Ready", p.GetTable().SortColCmd(readyCol, true), false),
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ui.KeyShiftT: ui.NewKeyAction("Sort Restart", p.GetTable().SortColCmd("RESTARTS", false), false),
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ui.KeyShiftS: ui.NewKeyAction("Sort Status", p.GetTable().SortColCmd(statusCol, true), false),
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ui.KeyShiftI: ui.NewKeyAction("Sort IP", p.GetTable().SortColCmd("IP", true), false),
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ui.KeyShiftO: ui.NewKeyAction("Sort Node", p.GetTable().SortColCmd("NODE", true), false),
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})
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aa.Add(resourceSorters(p.GetTable()))
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}
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func (p *Pod) logOptions(prev bool) (*dao.LogOptions, error) {
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path := p.GetTable().GetSelectedItem()
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if path == "" {
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return nil, errors.New("you must provide a selection")
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}
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pod, err := fetchPod(p.App().factory, path)
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if err != nil {
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return nil, err
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}
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cc, cfg := fetchContainers(pod.Spec, true), p.App().Config.K9s.Logger
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opts := dao.LogOptions{
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Path: path,
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Lines: int64(cfg.TailCount),
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SinceSeconds: cfg.SinceSeconds,
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SingleContainer: len(cc) == 1,
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ShowTimestamp: cfg.ShowTime,
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Previous: prev,
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}
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if c, ok := dao.GetDefaultLogContainer(pod.ObjectMeta, pod.Spec); ok {
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opts.Container, opts.DefaultContainer = c, c
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} else if len(cc) == 1 {
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opts.Container = cc[0]
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} else {
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opts.AllContainers = true
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}
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return &opts, nil
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}
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func (p *Pod) showContainers(app *App, model ui.Tabular, gvr, path string) {
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co := NewContainer(client.NewGVR("containers"))
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co.SetContextFn(p.coContext)
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if err := app.inject(co); err != nil {
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app.Flash().Err(err)
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}
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}
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func (p *Pod) coContext(ctx context.Context) context.Context {
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return context.WithValue(ctx, internal.KeyPath, p.GetTable().GetSelectedItem())
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}
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// Handlers...
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func (p *Pod) showNode(evt *tcell.EventKey) *tcell.EventKey {
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path := p.GetTable().GetSelectedItem()
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if path == "" {
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return evt
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}
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pod, err := fetchPod(p.App().factory, path)
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if err != nil {
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p.App().Flash().Err(err)
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return nil
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}
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if pod.Spec.NodeName == "" {
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p.App().Flash().Err(errors.New("no node assigned"))
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return nil
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}
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no := NewNode(client.NewGVR("v1/nodes"))
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no.SetInstance(pod.Spec.NodeName)
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//no.SetContextFn(nodeContext(pod.Spec.NodeName))
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if err := p.App().inject(no); err != nil {
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p.App().Flash().Err(err)
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}
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return nil
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}
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func (p *Pod) showPFCmd(evt *tcell.EventKey) *tcell.EventKey {
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path := p.GetTable().GetSelectedItem()
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if path == "" {
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return evt
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}
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if !p.App().factory.Forwarders().IsPodForwarded(path) {
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p.App().Flash().Errf("no port-forward defined")
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return nil
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}
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pf := NewPortForward(client.NewGVR("portforwards"))
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pf.SetContextFn(p.portForwardContext)
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if err := p.App().inject(pf); err != nil {
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p.App().Flash().Err(err)
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}
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return nil
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}
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func (p *Pod) portForwardContext(ctx context.Context) context.Context {
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ctx = context.WithValue(ctx, internal.KeyBenchCfg, p.App().BenchFile)
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return context.WithValue(ctx, internal.KeyPath, p.GetTable().GetSelectedItem())
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}
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func (p *Pod) killCmd(evt *tcell.EventKey) *tcell.EventKey {
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selections := p.GetTable().GetSelectedItems()
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if len(selections) == 0 {
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return evt
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}
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res, err := dao.AccessorFor(p.App().factory, p.GVR())
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if err != nil {
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p.App().Flash().Err(err)
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return nil
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}
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nuker, ok := res.(dao.Nuker)
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if !ok {
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p.App().Flash().Err(fmt.Errorf("expecting a nuker for %q", p.GVR()))
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return nil
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}
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if len(selections) > 1 {
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p.App().Flash().Infof("Delete %d marked %s", len(selections), p.GVR())
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} else {
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p.App().Flash().Infof("Delete resource %s %s", p.GVR(), selections[0])
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}
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p.GetTable().ShowDeleted()
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for _, path := range selections {
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if err := nuker.Delete(context.Background(), path, nil, true); err != nil {
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p.App().Flash().Errf("Delete failed with %s", err)
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} else {
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p.App().factory.DeleteForwarder(path)
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}
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p.GetTable().DeleteMark(path)
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}
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p.Refresh()
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return nil
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}
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func (p *Pod) shellCmd(evt *tcell.EventKey) *tcell.EventKey {
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path := p.GetTable().GetSelectedItem()
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if path == "" {
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return evt
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}
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if !podIsRunning(p.App().factory, path) {
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p.App().Flash().Errf("%s is not in a running state", path)
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return nil
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}
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if err := containerShellin(p.App(), p, path, ""); err != nil {
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p.App().Flash().Err(err)
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}
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return nil
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}
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func (p *Pod) attachCmd(evt *tcell.EventKey) *tcell.EventKey {
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path := p.GetTable().GetSelectedItem()
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if path == "" {
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return evt
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}
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if !podIsRunning(p.App().factory, path) {
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p.App().Flash().Errf("%s is not in a happy state", path)
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return nil
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}
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if err := containerAttachIn(p.App(), p, path, ""); err != nil {
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p.App().Flash().Err(err)
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}
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return nil
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}
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// ----------------------------------------------------------------------------
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// Helpers...
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func containerShellin(a *App, comp model.Component, path, co string) error {
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if co != "" {
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resumeShellIn(a, comp, path, co)
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return nil
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}
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pod, err := fetchPod(a.factory, path)
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if err != nil {
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return err
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}
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cc := fetchContainers(pod.Spec, false)
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if len(cc) == 1 {
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resumeShellIn(a, comp, path, cc[0])
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return nil
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}
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picker := NewPicker()
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picker.populate(cc)
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picker.SetSelectedFunc(func(_ int, co, _ string, _ rune) {
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resumeShellIn(a, comp, path, co)
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})
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return a.inject(picker)
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}
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func resumeShellIn(a *App, c model.Component, path, co string) {
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c.Stop()
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defer c.Start()
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shellIn(a, path, co)
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}
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func shellIn(a *App, fqn, co string) {
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os, err := getPodOS(a.factory, fqn)
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if err != nil {
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log.Warn().Err(err).Msgf("os detect failed")
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}
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args := computeShellArgs(fqn, co, a.Conn().Config().Flags().KubeConfig, os)
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c := color.New(color.BgGreen).Add(color.FgBlack).Add(color.Bold)
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if !runK(a, shellOpts{clear: true, banner: c.Sprintf(bannerFmt, fqn, co), args: args}) {
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a.Flash().Err(errors.New("Shell exec failed"))
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}
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}
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func containerAttachIn(a *App, comp model.Component, path, co string) error {
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if co != "" {
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resumeAttachIn(a, comp, path, co)
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return nil
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}
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pod, err := fetchPod(a.factory, path)
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if err != nil {
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return err
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}
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cc := fetchContainers(pod.Spec, false)
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if len(cc) == 1 {
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resumeAttachIn(a, comp, path, cc[0])
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return nil
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}
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picker := NewPicker()
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picker.populate(cc)
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picker.SetSelectedFunc(func(_ int, co, _ string, _ rune) {
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resumeAttachIn(a, comp, path, co)
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})
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if err := a.inject(picker); err != nil {
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return err
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}
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return nil
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}
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func resumeAttachIn(a *App, c model.Component, path, co string) {
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c.Stop()
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defer c.Start()
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attachIn(a, path, co)
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}
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func attachIn(a *App, path, co string) {
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args := buildShellArgs("attach", path, co, a.Conn().Config().Flags().KubeConfig)
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c := color.New(color.BgGreen).Add(color.FgBlack).Add(color.Bold)
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if !runK(a, shellOpts{clear: true, banner: c.Sprintf(bannerFmt, path, co), args: args}) {
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a.Flash().Err(errors.New("Attach exec failed"))
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}
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}
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func computeShellArgs(path, co string, kcfg *string, os string) []string {
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args := buildShellArgs("exec", path, co, kcfg)
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if os == windowsOS {
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return append(args, "--", powerShell)
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}
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return append(args, "--", "sh", "-c", shellCheck)
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}
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func buildShellArgs(cmd, path, co string, kcfg *string) []string {
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args := make([]string, 0, 15)
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args = append(args, cmd, "-it")
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ns, po := client.Namespaced(path)
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if ns != client.AllNamespaces {
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args = append(args, "-n", ns)
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}
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args = append(args, po)
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if kcfg != nil && *kcfg != "" {
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args = append(args, "--kubeconfig", *kcfg)
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}
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if co != "" {
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args = append(args, "-c", co)
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}
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return args
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}
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func fetchContainers(spec v1.PodSpec, allContainers bool) []string {
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nn := make([]string, 0, len(spec.Containers)+len(spec.InitContainers))
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for _, c := range spec.Containers {
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nn = append(nn, c.Name)
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}
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if !allContainers {
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return nn
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}
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for _, c := range spec.InitContainers {
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nn = append(nn, c.Name)
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}
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for _, c := range spec.EphemeralContainers {
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nn = append(nn, c.Name)
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}
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return nn
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}
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func fetchPod(f dao.Factory, path string) (*v1.Pod, error) {
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o, err := f.Get("v1/pods", path, true, labels.Everything())
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if err != nil {
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return nil, err
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}
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var pod v1.Pod
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err = runtime.DefaultUnstructuredConverter.FromUnstructured(o.(*unstructured.Unstructured).Object, &pod)
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if err != nil {
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return nil, err
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}
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return &pod, nil
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}
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func podIsRunning(f dao.Factory, path string) bool {
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po, err := fetchPod(f, path)
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if err != nil {
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log.Error().Err(err).Msg("unable to fetch pod")
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return false
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}
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var re render.Pod
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return re.Phase(po) == render.Running
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}
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func getPodOS(f dao.Factory, fqn string) (string, error) {
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po, err := fetchPod(f, fqn)
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if err != nil {
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return "", err
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}
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if os, ok := po.Spec.NodeSelector[osBetaSelector]; ok {
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return os, nil
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}
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os, ok := po.Spec.NodeSelector[osSelector]
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if !ok {
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return "", fmt.Errorf("no os information available")
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}
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return os, nil
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}
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func resourceSorters(t *Table) ui.KeyActions {
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return ui.KeyActions{
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ui.KeyShiftC: ui.NewKeyAction("Sort CPU", t.SortColCmd(cpuCol, false), false),
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ui.KeyShiftM: ui.NewKeyAction("Sort MEM", t.SortColCmd(memCol, false), false),
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ui.KeyShiftX: ui.NewKeyAction("Sort CPU/R", t.SortColCmd("%CPU/R", false), false),
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ui.KeyShiftZ: ui.NewKeyAction("Sort MEM/R", t.SortColCmd("%MEM/R", false), false),
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tcell.KeyCtrlX: ui.NewKeyAction("Sort CPU/L", t.SortColCmd("%CPU/L", false), false),
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tcell.KeyCtrlQ: ui.NewKeyAction("Sort MEM/L", t.SortColCmd("%MEM/L", false), false),
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}
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}
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