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Refactor get pods layout

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This commit is contained in:
Anastasis Andronidis
2015-05-30 03:42:44 +02:00
parent 710df2b619
commit 68d9313d69
2 changed files with 125 additions and 191 deletions
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137
pkg/kubectl/resource_printer.go
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@@ -35,7 +35,6 @@ import (
"github.com/GoogleCloudPlatform/kubernetes/pkg/types"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
"github.com/GoogleCloudPlatform/kubernetes/pkg/volume"
"github.com/docker/docker/pkg/units"
"github.com/ghodss/yaml"
"github.com/golang/glog"
)
@@ -247,7 +246,7 @@ func (h *HumanReadablePrinter) HandledResources() []string {
return keys
}
var podColumns = []string{"POD", "IP", "CONTAINER(S)", "IMAGE(S)", "HOST", "LABELS", "STATUS", "CREATED", "MESSAGE"}
var podColumns = []string{"NAME", "READY", "REASON", "RESTARTS", "AGE"}
var podTemplateColumns = []string{"TEMPLATE", "CONTAINER(S)", "IMAGE(S)", "PODLABELS"}
var replicationControllerColumns = []string{"CONTROLLER", "CONTAINER(S)", "IMAGE(S)", "SELECTOR", "REPLICAS"}
var serviceColumns = []string{"NAME", "LABELS", "SELECTOR", "IP(S)", "PORT(S)"}
@@ -350,107 +349,65 @@ func podHostString(host, ip string) string {
return host + "/" + ip
}
func shortHumanDuration(d time.Duration) string {
if seconds := int(d.Seconds()); seconds < 60 {
return fmt.Sprintf("%ds", seconds)
} else if minutes := int(d.Minutes()); minutes < 60 {
return fmt.Sprintf("%dm", minutes)
} else if hours := int(d.Hours()); hours < 24 {
return fmt.Sprintf("%dh", hours)
} else if hours < 24*364 {
return fmt.Sprintf("%dd", hours/24)
}
return fmt.Sprintf("%dy", int(d.Hours()/24/365))
}
// translateTimestamp returns the elapsed time since timestamp in
// human-readable approximation.
func translateTimestamp(timestamp util.Time) string {
return units.HumanDuration(time.Now().Sub(timestamp.Time))
}
// interpretContainerStatus interprets the container status and returns strings
// associated with columns "STATUS", "CREATED", and "MESSAGE".
// The meaning of MESSAGE varies based on the context of STATUS:
// STATUS: Waiting; MESSAGE: reason for waiting
// STATUS: Running; MESSAGE: reason for the last termination
// STATUS: Terminated; MESSAGE: reason for this termination
func interpretContainerStatus(status *api.ContainerStatus) (string, string, string, error) {
// Helper function to compose a meaning message from terminate state.
getTermMsg := func(state *api.ContainerStateTerminated) string {
var message string
if state != nil {
message = fmt.Sprintf("exit code %d", state.ExitCode)
if state.Reason != "" {
message = fmt.Sprintf("%s, reason: %s", message, state.Reason)
}
}
return message
}
state := &status.State
if state.Waiting != nil {
return "Waiting", "", state.Waiting.Reason, nil
} else if state.Running != nil {
// Get the information of the last termination state. This is useful if
// a container is stuck in a crash loop.
message := getTermMsg(status.LastTerminationState.Terminated)
if message != "" {
message = "last termination: " + message
}
stateMsg := "Running"
if !status.Ready {
stateMsg = stateMsg + " *not ready*"
}
return stateMsg, translateTimestamp(state.Running.StartedAt), message, nil
} else if state.Terminated != nil {
return "Terminated", translateTimestamp(state.Terminated.StartedAt), getTermMsg(state.Terminated), nil
}
return "", "", "", fmt.Errorf("unknown container state %#v", *state)
return shortHumanDuration(time.Now().Sub(timestamp.Time))
}
func printPod(pod *api.Pod, w io.Writer, withNamespace bool) error {
var name string
name := pod.Name
if withNamespace {
name = types.NamespacedName{pod.Namespace, pod.Name}.String()
} else {
name = pod.Name
name = types.NamespacedName{Namespace: pod.Namespace, Name: pod.Name}.String()
}
_, err := fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\n",
restarts := 0
totalContainers := len(pod.Spec.Containers)
readyContainers := 0
reason := string(pod.Status.Phase)
for i := len(pod.Status.ContainerStatuses) - 1; i >= 0; i-- {
container := pod.Status.ContainerStatuses[i]
restarts += container.RestartCount
if container.State.Waiting != nil && container.State.Waiting.Reason != "" {
reason = container.State.Waiting.Reason
} else if container.State.Terminated != nil && container.State.Terminated.Reason != "" {
reason = container.State.Terminated.Reason
} else if container.State.Terminated != nil && container.State.Terminated.Reason == "" {
if container.State.Terminated.Signal != 0 {
reason = fmt.Sprintf("Signal:%d", container.State.Terminated.Signal)
} else {
reason = fmt.Sprintf("ExitCode:%d", container.State.Terminated.ExitCode)
}
} else if container.Ready && container.State.Running != nil {
readyContainers++
}
}
_, err := fmt.Fprintf(w, "%s\t%d/%d\t%s\t%d\t%s\n",
name,
pod.Status.PodIP,
"", "",
podHostString(pod.Spec.NodeName, pod.Status.HostIP),
formatLabels(pod.Labels),
pod.Status.Phase,
translateTimestamp(pod.CreationTimestamp),
pod.Status.Message,
)
readyContainers,
totalContainers,
reason,
restarts,
translateTimestamp(pod.CreationTimestamp))
if err != nil {
return err
}
// Lay out all containers on separate lines.
statuses := pod.Status.ContainerStatuses
if len(statuses) == 0 {
// Container status has not been reported yet. Print basic information
// of the containers and exit the function.
for _, container := range pod.Spec.Containers {
_, err := fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\n",
"", "", container.Name, container.Image, "", "", "", "", "")
if err != nil {
return err
}
}
return nil
}
// Print the actual container statuses.
for _, status := range statuses {
state, created, message, err := interpretContainerStatus(&status)
if err != nil {
return err
}
_, err = fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\n",
"", "",
status.Name,
status.Image,
"", "",
state,
created,
message,
)
if err != nil {
return err
}
}
return nil
}