433 lines
13 KiB
Go
433 lines
13 KiB
Go
package command
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import (
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"fmt"
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"math"
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"sort"
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"strconv"
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"strings"
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"time"
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"github.com/dustin/go-humanize"
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"github.com/mitchellh/colorstring"
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"github.com/hashicorp/nomad/api"
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"github.com/hashicorp/nomad/client"
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)
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type AllocStatusCommand struct {
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Meta
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color *colorstring.Colorize
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}
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func (c *AllocStatusCommand) Help() string {
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helpText := `
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Usage: nomad alloc-status [options] <allocation>
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Display information about existing allocations and its tasks. This command can
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be used to inspect the current status of all allocation, including its running
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status, metadata, and verbose failure messages reported by internal
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subsystems.
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General Options:
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` + generalOptionsUsage() + `
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Alloc Status Options:
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-short
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Display short output. Shows only the most recent task event.
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-stats
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Display detailed resource usage statistics
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-verbose
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Show full information.
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`
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return strings.TrimSpace(helpText)
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}
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func (c *AllocStatusCommand) Synopsis() string {
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return "Display allocation status information and metadata"
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}
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func (c *AllocStatusCommand) Run(args []string) int {
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var short, displayStats, verbose bool
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flags := c.Meta.FlagSet("alloc-status", FlagSetClient)
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flags.Usage = func() { c.Ui.Output(c.Help()) }
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flags.BoolVar(&short, "short", false, "")
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flags.BoolVar(&verbose, "verbose", false, "")
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flags.BoolVar(&displayStats, "stats", false, "")
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if err := flags.Parse(args); err != nil {
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return 1
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}
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// Check that we got exactly one allocation ID
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args = flags.Args()
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if len(args) != 1 {
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c.Ui.Error(c.Help())
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return 1
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}
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allocID := args[0]
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// Get the HTTP client
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client, err := c.Meta.Client()
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
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return 1
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}
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// Truncate the id unless full length is requested
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length := shortId
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if verbose {
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length = fullId
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}
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// Query the allocation info
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if len(allocID) == 1 {
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c.Ui.Error(fmt.Sprintf("Identifier must contain at least two characters."))
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return 1
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}
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if len(allocID)%2 == 1 {
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// Identifiers must be of even length, so we strip off the last byte
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// to provide a consistent user experience.
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allocID = allocID[:len(allocID)-1]
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}
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allocs, _, err := client.Allocations().PrefixList(allocID)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error querying allocation: %v", err))
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return 1
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}
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if len(allocs) == 0 {
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c.Ui.Error(fmt.Sprintf("No allocation(s) with prefix or id %q found", allocID))
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return 1
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}
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if len(allocs) > 1 {
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// Format the allocs
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out := make([]string, len(allocs)+1)
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out[0] = "ID|Eval ID|Job ID|Task Group|Desired Status|Client Status"
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for i, alloc := range allocs {
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out[i+1] = fmt.Sprintf("%s|%s|%s|%s|%s|%s",
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limit(alloc.ID, length),
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limit(alloc.EvalID, length),
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alloc.JobID,
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alloc.TaskGroup,
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alloc.DesiredStatus,
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alloc.ClientStatus,
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)
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}
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c.Ui.Output(fmt.Sprintf("Prefix matched multiple allocations\n\n%s", formatList(out)))
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return 0
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}
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// Prefix lookup matched a single allocation
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alloc, _, err := client.Allocations().Info(allocs[0].ID, nil)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error querying allocation: %s", err))
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return 1
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}
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var statsErr error
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var stats *api.AllocResourceUsage
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stats, statsErr = client.Allocations().Stats(alloc, nil)
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if statsErr != nil {
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c.Ui.Output("")
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c.Ui.Error(fmt.Sprintf("couldn't retrieve stats (HINT: ensure Client.Advertise.HTTP is set): %v", statsErr))
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}
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// Format the allocation data
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basic := []string{
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fmt.Sprintf("ID|%s", limit(alloc.ID, length)),
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fmt.Sprintf("Eval ID|%s", limit(alloc.EvalID, length)),
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fmt.Sprintf("Name|%s", alloc.Name),
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fmt.Sprintf("Node ID|%s", limit(alloc.NodeID, length)),
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fmt.Sprintf("Job ID|%s", alloc.JobID),
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fmt.Sprintf("Client Status|%s", alloc.ClientStatus),
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}
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if verbose {
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basic = append(basic,
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fmt.Sprintf("Evaluated Nodes|%d", alloc.Metrics.NodesEvaluated),
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fmt.Sprintf("Filtered Nodes|%d", alloc.Metrics.NodesFiltered),
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fmt.Sprintf("Exhausted Nodes|%d", alloc.Metrics.NodesExhausted),
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fmt.Sprintf("Allocation Time|%s", alloc.Metrics.AllocationTime),
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fmt.Sprintf("Failures|%d", alloc.Metrics.CoalescedFailures))
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}
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c.Ui.Output(formatKV(basic))
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if short {
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c.shortTaskStatus(alloc)
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} else {
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c.outputTaskDetails(alloc, stats, displayStats)
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}
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// Format the detailed status
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if verbose {
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c.Ui.Output(c.Colorize().Color("\n[bold]Placement Metrics[reset]"))
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c.Ui.Output(formatAllocMetrics(alloc.Metrics, true, " "))
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}
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return 0
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}
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// outputTaskDetails prints task details for each task in the allocation,
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// optionally printing verbose statistics if displayStats is set
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func (c *AllocStatusCommand) outputTaskDetails(alloc *api.Allocation, stats *api.AllocResourceUsage, displayStats bool) {
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for task := range c.sortedTaskStateIterator(alloc.TaskStates) {
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state := alloc.TaskStates[task]
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c.Ui.Output(c.Colorize().Color(fmt.Sprintf("\n[bold]Task %q is %q[reset]", task, state.State)))
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c.outputTaskResources(alloc, task, stats, displayStats)
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c.Ui.Output("")
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c.outputTaskStatus(state)
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}
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}
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// outputTaskStatus prints out a list of the most recent events for the given
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// task state.
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func (c *AllocStatusCommand) outputTaskStatus(state *api.TaskState) {
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c.Ui.Output("Recent Events:")
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events := make([]string, len(state.Events)+1)
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events[0] = "Time|Type|Description"
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size := len(state.Events)
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for i, event := range state.Events {
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formatedTime := c.formatUnixNanoTime(event.Time)
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// Build up the description based on the event type.
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var desc string
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switch event.Type {
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case api.TaskStarted:
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desc = "Task started by client"
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case api.TaskReceived:
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desc = "Task received by client"
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case api.TaskFailedValidation:
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if event.ValidationError != "" {
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desc = event.ValidationError
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} else {
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desc = "Validation of task failed"
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}
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case api.TaskDriverFailure:
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if event.DriverError != "" {
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desc = event.DriverError
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} else {
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desc = "Failed to start task"
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}
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case api.TaskDownloadingArtifacts:
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desc = "Client is downloading artifacts"
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case api.TaskArtifactDownloadFailed:
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if event.DownloadError != "" {
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desc = event.DownloadError
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} else {
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desc = "Failed to download artifacts"
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}
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case api.TaskKilled:
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if event.KillError != "" {
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desc = event.KillError
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} else {
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desc = "Task successfully killed"
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}
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case api.TaskTerminated:
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var parts []string
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parts = append(parts, fmt.Sprintf("Exit Code: %d", event.ExitCode))
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if event.Signal != 0 {
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parts = append(parts, fmt.Sprintf("Signal: %d", event.Signal))
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}
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if event.Message != "" {
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parts = append(parts, fmt.Sprintf("Exit Message: %q", event.Message))
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}
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desc = strings.Join(parts, ", ")
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case api.TaskRestarting:
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in := fmt.Sprintf("Task restarting in %v", time.Duration(event.StartDelay))
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if event.RestartReason != "" && event.RestartReason != client.ReasonWithinPolicy {
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desc = fmt.Sprintf("%s - %s", event.RestartReason, in)
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} else {
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desc = in
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}
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case api.TaskNotRestarting:
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if event.RestartReason != "" {
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desc = event.RestartReason
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} else {
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desc = "Task exceeded restart policy"
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}
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}
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// Reverse order so we are sorted by time
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events[size-i] = fmt.Sprintf("%s|%s|%s", formatedTime, event.Type, desc)
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}
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c.Ui.Output(formatList(events))
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}
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// outputTaskResources prints the task resources for the passed task and if
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// displayStats is set, verbose resource usage statistics
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func (c *AllocStatusCommand) outputTaskResources(alloc *api.Allocation, task string, stats *api.AllocResourceUsage, displayStats bool) {
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resource, ok := alloc.TaskResources[task]
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if !ok {
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return
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}
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c.Ui.Output("Task Resources")
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var addr []string
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for _, nw := range resource.Networks {
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ports := append(nw.DynamicPorts, nw.ReservedPorts...)
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for _, port := range ports {
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addr = append(addr, fmt.Sprintf("%v: %v:%v\n", port.Label, nw.IP, port.Value))
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}
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}
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var resourcesOutput []string
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resourcesOutput = append(resourcesOutput, "CPU|Memory|Disk|IOPS|Addresses")
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firstAddr := ""
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if len(addr) > 0 {
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firstAddr = addr[0]
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}
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// Display the rolled up stats. If possible prefer the live stastics
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cpuUsage := strconv.Itoa(resource.CPU)
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memUsage := humanize.IBytes(uint64(resource.MemoryMB * bytesPerMegabyte))
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if ru, ok := stats.Tasks[task]; ok && ru != nil && ru.ResourceUsage != nil {
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if cs := ru.ResourceUsage.CpuStats; cs != nil {
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cpuUsage = fmt.Sprintf("%v/%v", math.Floor(cs.TotalTicks), resource.CPU)
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}
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if ms := ru.ResourceUsage.MemoryStats; ms != nil {
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memUsage = fmt.Sprintf("%v/%v", humanize.IBytes(ms.RSS), memUsage)
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}
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}
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resourcesOutput = append(resourcesOutput, fmt.Sprintf("%v|%v|%v|%v|%v",
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cpuUsage,
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memUsage,
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humanize.IBytes(uint64(resource.DiskMB*bytesPerMegabyte)),
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resource.IOPS,
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firstAddr))
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for i := 1; i < len(addr); i++ {
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resourcesOutput = append(resourcesOutput, fmt.Sprintf("||||%v", addr[i]))
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}
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c.Ui.Output(formatListWithSpaces(resourcesOutput))
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if ru, ok := stats.Tasks[task]; ok && ru != nil && displayStats && ru.ResourceUsage != nil {
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c.Ui.Output("")
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c.outputVerboseResourceUsage(task, ru.ResourceUsage)
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}
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}
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// outputVerboseResourceUsage outputs the verbose resource usage for the passed
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// task
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func (c *AllocStatusCommand) outputVerboseResourceUsage(task string, resourceUsage *api.ResourceUsage) {
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memoryStats := resourceUsage.MemoryStats
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cpuStats := resourceUsage.CpuStats
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if memoryStats != nil && len(memoryStats.Measured) > 0 {
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c.Ui.Output("Memory Stats")
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// Sort the measured stats
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sort.Strings(memoryStats.Measured)
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var measuredStats []string
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for _, measured := range memoryStats.Measured {
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switch measured {
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case "RSS":
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measuredStats = append(measuredStats, humanize.IBytes(memoryStats.RSS))
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case "Cache":
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measuredStats = append(measuredStats, humanize.IBytes(memoryStats.Cache))
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case "Swap":
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measuredStats = append(measuredStats, humanize.IBytes(memoryStats.Swap))
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case "Max Usage":
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measuredStats = append(measuredStats, humanize.IBytes(memoryStats.MaxUsage))
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case "Kernel Usage":
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measuredStats = append(measuredStats, humanize.IBytes(memoryStats.KernelUsage))
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case "Kernel Max Usage":
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measuredStats = append(measuredStats, humanize.IBytes(memoryStats.KernelMaxUsage))
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}
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}
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out := make([]string, 2)
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out[0] = strings.Join(memoryStats.Measured, "|")
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out[1] = strings.Join(measuredStats, "|")
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c.Ui.Output(formatList(out))
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c.Ui.Output("")
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}
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if cpuStats != nil && len(cpuStats.Measured) > 0 {
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c.Ui.Output("CPU Stats")
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// Sort the measured stats
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sort.Strings(cpuStats.Measured)
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var measuredStats []string
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for _, measured := range cpuStats.Measured {
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switch measured {
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case "Percent":
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percent := strconv.FormatFloat(cpuStats.Percent, 'f', 2, 64)
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measuredStats = append(measuredStats, fmt.Sprintf("%v%%", percent))
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case "Throttled Periods":
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measuredStats = append(measuredStats, fmt.Sprintf("%v", cpuStats.ThrottledPeriods))
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case "Throttled Time":
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measuredStats = append(measuredStats, fmt.Sprintf("%v", cpuStats.ThrottledTime))
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case "User Mode":
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percent := strconv.FormatFloat(cpuStats.UserMode, 'f', 2, 64)
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measuredStats = append(measuredStats, fmt.Sprintf("%v%%", percent))
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case "System Mode":
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percent := strconv.FormatFloat(cpuStats.SystemMode, 'f', 2, 64)
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measuredStats = append(measuredStats, fmt.Sprintf("%v%%", percent))
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}
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}
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out := make([]string, 2)
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out[0] = strings.Join(cpuStats.Measured, "|")
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out[1] = strings.Join(measuredStats, "|")
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c.Ui.Output(formatList(out))
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}
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}
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// shortTaskStatus prints out the current state of each task.
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func (c *AllocStatusCommand) shortTaskStatus(alloc *api.Allocation) {
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tasks := make([]string, 0, len(alloc.TaskStates)+1)
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tasks = append(tasks, "Name|State|Last Event|Time")
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for task := range c.sortedTaskStateIterator(alloc.TaskStates) {
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state := alloc.TaskStates[task]
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lastState := state.State
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var lastEvent, lastTime string
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l := len(state.Events)
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if l != 0 {
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last := state.Events[l-1]
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lastEvent = last.Type
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lastTime = c.formatUnixNanoTime(last.Time)
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}
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tasks = append(tasks, fmt.Sprintf("%s|%s|%s|%s",
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task, lastState, lastEvent, lastTime))
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}
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c.Ui.Output(c.Colorize().Color("\n[bold]Tasks[reset]"))
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c.Ui.Output(formatList(tasks))
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}
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// sortedTaskStateIterator is a helper that takes the task state map and returns a
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// channel that returns the keys in a sorted order.
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func (c *AllocStatusCommand) sortedTaskStateIterator(m map[string]*api.TaskState) <-chan string {
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output := make(chan string, len(m))
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keys := make([]string, len(m))
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i := 0
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for k := range m {
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keys[i] = k
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i++
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}
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sort.Strings(keys)
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for _, key := range keys {
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output <- key
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}
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close(output)
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return output
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}
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// formatUnixNanoTime is a helper for formating time for output.
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func (c *AllocStatusCommand) formatUnixNanoTime(nano int64) string {
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t := time.Unix(0, nano)
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return formatTime(t)
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}
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