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alloc_status.go
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alloc_status.go
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package command
import (
"fmt"
"sort"
"strings"
"time"
"github.com/hashicorp/nomad/api"
"github.com/hashicorp/nomad/client"
)
type AllocStatusCommand struct {
Meta
}
func (c *AllocStatusCommand) Help() string {
helpText := `
Usage: nomad alloc-status [options] <allocation>
Display information about existing allocations and its tasks. This command can
be used to inspect the current status of all allocation, including its running
status, metadata, and verbose failure messages reported by internal
subsystems.
General Options:
` + generalOptionsUsage() + `
-short
Display short output. Shows only the most recent task event.
-verbose
Show full information.
`
return strings.TrimSpace(helpText)
}
func (c *AllocStatusCommand) Synopsis() string {
return "Display allocation status information and metadata"
}
func (c *AllocStatusCommand) Run(args []string) int {
var short, verbose bool
flags := c.Meta.FlagSet("alloc-status", FlagSetClient)
flags.Usage = func() { c.Ui.Output(c.Help()) }
flags.BoolVar(&short, "short", false, "")
flags.BoolVar(&verbose, "verbose", false, "")
if err := flags.Parse(args); err != nil {
return 1
}
// Check that we got exactly one allocation ID
args = flags.Args()
if len(args) != 1 {
c.Ui.Error(c.Help())
return 1
}
allocID := args[0]
// Get the HTTP client
client, err := c.Meta.Client()
if err != nil {
c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
return 1
}
// Truncate the id unless full length is requested
length := shortId
if verbose {
length = fullId
}
// Query the allocation info
if len(allocID) == 1 {
c.Ui.Error(fmt.Sprintf("Identifier must contain at least two characters."))
return 1
}
if len(allocID)%2 == 1 {
// Identifiers must be of even length, so we strip off the last byte
// to provide a consistent user experience.
allocID = allocID[:len(allocID)-1]
}
allocs, _, err := client.Allocations().PrefixList(allocID)
if err != nil {
c.Ui.Error(fmt.Sprintf("Error querying allocation: %v", err))
return 1
}
if len(allocs) == 0 {
c.Ui.Error(fmt.Sprintf("No allocation(s) with prefix or id %q found", allocID))
return 1
}
if len(allocs) > 1 {
// Format the allocs
out := make([]string, len(allocs)+1)
out[0] = "ID|Eval ID|Job ID|Task Group|Desired Status|Client Status"
for i, alloc := range allocs {
out[i+1] = fmt.Sprintf("%s|%s|%s|%s|%s|%s",
limit(alloc.ID, length),
limit(alloc.EvalID, length),
alloc.JobID,
alloc.TaskGroup,
alloc.DesiredStatus,
alloc.ClientStatus,
)
}
c.Ui.Output(fmt.Sprintf("Prefix matched multiple allocations\n\n%s", formatList(out)))
return 0
}
// Prefix lookup matched a single allocation
alloc, _, err := client.Allocations().Info(allocs[0].ID, nil)
if err != nil {
c.Ui.Error(fmt.Sprintf("Error querying allocation: %s", err))
return 1
}
// Format the allocation data
basic := []string{
fmt.Sprintf("ID|%s", limit(alloc.ID, length)),
fmt.Sprintf("Eval ID|%s", limit(alloc.EvalID, length)),
fmt.Sprintf("Name|%s", alloc.Name),
fmt.Sprintf("Node ID|%s", limit(alloc.NodeID, length)),
fmt.Sprintf("Job ID|%s", alloc.JobID),
fmt.Sprintf("Client Status|%s", alloc.ClientStatus),
}
if verbose {
basic = append(basic,
fmt.Sprintf("Evaluated Nodes|%d", alloc.Metrics.NodesEvaluated),
fmt.Sprintf("Filtered Nodes|%d", alloc.Metrics.NodesFiltered),
fmt.Sprintf("Exhausted Nodes|%d", alloc.Metrics.NodesExhausted),
fmt.Sprintf("Allocation Time|%s", alloc.Metrics.AllocationTime),
fmt.Sprintf("Failures|%d", alloc.Metrics.CoalescedFailures))
}
c.Ui.Output(formatKV(basic))
if !short {
c.taskResources(alloc)
}
// Print the state of each task.
if short {
c.shortTaskStatus(alloc)
} else {
c.taskStatus(alloc)
}
// Format the detailed status
if verbose || alloc.DesiredStatus == "failed" {
c.Ui.Output("\n==> Status")
dumpAllocStatus(c.Ui, alloc, length)
}
return 0
}
// shortTaskStatus prints out the current state of each task.
func (c *AllocStatusCommand) shortTaskStatus(alloc *api.Allocation) {
tasks := make([]string, 0, len(alloc.TaskStates)+1)
tasks = append(tasks, "Name|State|Last Event|Time")
for task := range c.sortedTaskStateIterator(alloc.TaskStates) {
state := alloc.TaskStates[task]
lastState := state.State
var lastEvent, lastTime string
l := len(state.Events)
if l != 0 {
last := state.Events[l-1]
lastEvent = last.Type
lastTime = c.formatUnixNanoTime(last.Time)
}
tasks = append(tasks, fmt.Sprintf("%s|%s|%s|%s",
task, lastState, lastEvent, lastTime))
}
c.Ui.Output("\n==> Tasks")
c.Ui.Output(formatList(tasks))
}
// taskStatus prints out the most recent events for each task.
func (c *AllocStatusCommand) taskStatus(alloc *api.Allocation) {
for task := range c.sortedTaskStateIterator(alloc.TaskStates) {
state := alloc.TaskStates[task]
events := make([]string, len(state.Events)+1)
events[0] = "Time|Type|Description"
size := len(state.Events)
for i, event := range state.Events {
formatedTime := c.formatUnixNanoTime(event.Time)
// Build up the description based on the event type.
var desc string
switch event.Type {
case api.TaskStarted:
desc = "Task started by client"
case api.TaskReceived:
desc = "Task received by client"
case api.TaskFailedValidation:
if event.ValidationError != "" {
desc = event.ValidationError
} else {
desc = "Validation of task failed"
}
case api.TaskDriverFailure:
if event.DriverError != "" {
desc = event.DriverError
} else {
desc = "Failed to start task"
}
case api.TaskDownloadingArtifacts:
desc = "Client is downloading artifacts"
case api.TaskArtifactDownloadFailed:
if event.DownloadError != "" {
desc = event.DownloadError
} else {
desc = "Failed to download artifacts"
}
case api.TaskKilled:
if event.KillError != "" {
desc = event.KillError
} else {
desc = "Task successfully killed"
}
case api.TaskTerminated:
var parts []string
parts = append(parts, fmt.Sprintf("Exit Code: %d", event.ExitCode))
if event.Signal != 0 {
parts = append(parts, fmt.Sprintf("Signal: %d", event.Signal))
}
if event.Message != "" {
parts = append(parts, fmt.Sprintf("Exit Message: %q", event.Message))
}
desc = strings.Join(parts, ", ")
case api.TaskRestarting:
in := fmt.Sprintf("Task restarting in %v", time.Duration(event.StartDelay))
if event.RestartReason != "" && event.RestartReason != client.ReasonWithinPolicy {
desc = fmt.Sprintf("%s - %s", event.RestartReason, in)
} else {
desc = in
}
case api.TaskNotRestarting:
if event.RestartReason != "" {
desc = event.RestartReason
} else {
desc = "Task exceeded restart policy"
}
}
// Reverse order so we are sorted by time
events[size-i] = fmt.Sprintf("%s|%s|%s", formatedTime, event.Type, desc)
}
c.Ui.Output(fmt.Sprintf("\n==> Task %q is %q\nRecent Events:", task, state.State))
c.Ui.Output(formatList(events))
}
}
// formatUnixNanoTime is a helper for formating time for output.
func (c *AllocStatusCommand) formatUnixNanoTime(nano int64) string {
t := time.Unix(0, nano)
return formatTime(t)
}
// sortedTaskStateIterator is a helper that takes the task state map and returns a
// channel that returns the keys in a sorted order.
func (c *AllocStatusCommand) sortedTaskStateIterator(m map[string]*api.TaskState) <-chan string {
output := make(chan string, len(m))
keys := make([]string, len(m))
i := 0
for k := range m {
keys[i] = k
i++
}
sort.Strings(keys)
for _, key := range keys {
output <- key
}
close(output)
return output
}
// allocResources prints out the allocation current resource usage
func (c *AllocStatusCommand) allocResources(alloc *api.Allocation) {
resources := make([]string, 2)
resources[0] = "CPU|Memory MB|Disk MB|IOPS"
resources[1] = fmt.Sprintf("%v|%v|%v|%v",
alloc.Resources.CPU,
alloc.Resources.MemoryMB,
alloc.Resources.DiskMB,
alloc.Resources.IOPS)
c.Ui.Output(formatList(resources))
}
// taskResources prints out the tasks current resource usage
func (c *AllocStatusCommand) taskResources(alloc *api.Allocation) {
if len(alloc.TaskResources) == 0 {
return
}
// Sort the tasks.
tasks := make([]string, 0, len(alloc.TaskResources))
for task := range alloc.TaskResources {
tasks = append(tasks, task)
}
sort.Strings(tasks)
c.Ui.Output("\n==> Task Resources")
firstLine := true
for _, task := range tasks {
resource := alloc.TaskResources[task]
header := fmt.Sprintf("\nTask: %q", task)
if firstLine {
header = fmt.Sprintf("Task: %q", task)
firstLine = false
}
c.Ui.Output(header)
var addr []string
for _, nw := range resource.Networks {
ports := append(nw.DynamicPorts, nw.ReservedPorts...)
for _, port := range ports {
addr = append(addr, fmt.Sprintf("%v: %v:%v\n", port.Label, nw.IP, port.Value))
}
}
var resourcesOutput []string
resourcesOutput = append(resourcesOutput, "CPU|Memory MB|Disk MB|IOPS|Addresses")
firstAddr := ""
if len(addr) > 0 {
firstAddr = addr[0]
}
resourcesOutput = append(resourcesOutput, fmt.Sprintf("%v|%v|%v|%v|%v",
resource.CPU,
resource.MemoryMB,
resource.DiskMB,
resource.IOPS,
firstAddr))
for i := 1; i < len(addr); i++ {
resourcesOutput = append(resourcesOutput, fmt.Sprintf("||||%v", addr[i]))
}
c.Ui.Output(formatListWithSpaces(resourcesOutput))
}
}