608 lines
16 KiB
Go
608 lines
16 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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"strings"
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"time"
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humanize "github.com/dustin/go-humanize"
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"github.com/mitchellh/colorstring"
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"github.com/posener/complete"
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"github.com/hashicorp/nomad/api"
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"github.com/hashicorp/nomad/api/contexts"
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"github.com/hashicorp/nomad/helper"
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)
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const (
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// floatFormat is a format string for formatting floats.
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floatFormat = "#,###.##"
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// bytesPerMegabyte is the number of bytes per MB
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bytesPerMegabyte = 1024 * 1024
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)
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type NodeStatusCommand struct {
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Meta
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color *colorstring.Colorize
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length int
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short bool
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verbose bool
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list_allocs bool
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self bool
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stats bool
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json bool
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tmpl string
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}
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func (c *NodeStatusCommand) Help() string {
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helpText := `
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Usage: nomad node-status [options] <node>
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Display status information about a given node. The list of nodes
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returned includes only nodes which jobs may be scheduled to, and
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includes status and other high-level information.
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If a node ID is passed, information for that specific node will be displayed,
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including resource usage statistics. If no node ID's are passed, then a
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short-hand list of all nodes will be displayed. The -self flag is useful to
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quickly access the status of the local node.
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General Options:
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` + generalOptionsUsage() + `
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Node Status Options:
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-self
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Query the status of the local node.
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-stats
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Display detailed resource usage statistics.
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-allocs
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Display a count of running allocations for each node.
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-short
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Display short output. Used only when a single node is being
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queried, and drops verbose output about node allocations.
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-verbose
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Display full information.
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-json
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Output the node in its JSON format.
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-t
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Format and display node using a Go template.
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`
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return strings.TrimSpace(helpText)
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}
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func (c *NodeStatusCommand) Synopsis() string {
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return "Display status information about nodes"
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}
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func (c *NodeStatusCommand) AutocompleteFlags() complete.Flags {
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return mergeAutocompleteFlags(c.Meta.AutocompleteFlags(FlagSetClient),
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complete.Flags{
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"-allocs": complete.PredictNothing,
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"-json": complete.PredictNothing,
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"-self": complete.PredictNothing,
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"-short": complete.PredictNothing,
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"-stats": complete.PredictNothing,
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"-t": complete.PredictAnything,
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"-verbose": complete.PredictNothing,
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})
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}
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func (c *NodeStatusCommand) AutocompleteArgs() complete.Predictor {
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client, _ := c.Meta.Client()
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return complete.PredictFunc(func(a complete.Args) []string {
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if len(a.Completed) > 1 {
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return nil
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}
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resp, _, err := client.Search().PrefixSearch(a.Last, contexts.Nodes, nil)
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if err != nil {
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return []string{}
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}
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return resp.Matches[contexts.Nodes]
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})
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}
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func (c *NodeStatusCommand) Run(args []string) int {
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flags := c.Meta.FlagSet("node-status", FlagSetClient)
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flags.Usage = func() { c.Ui.Output(c.Help()) }
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flags.BoolVar(&c.short, "short", false, "")
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flags.BoolVar(&c.verbose, "verbose", false, "")
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flags.BoolVar(&c.list_allocs, "allocs", false, "")
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flags.BoolVar(&c.self, "self", false, "")
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flags.BoolVar(&c.stats, "stats", false, "")
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flags.BoolVar(&c.json, "json", false, "")
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flags.StringVar(&c.tmpl, "t", "", "")
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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 either a single node or none
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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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// Truncate the id unless full length is requested
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c.length = shortId
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if c.verbose {
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c.length = fullId
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}
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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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// Use list mode if no node name was provided
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if len(args) == 0 && !c.self {
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// Query the node info
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nodes, _, err := client.Nodes().List(nil)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error querying node status: %s", err))
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return 1
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}
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// If output format is specified, format and output the node data list
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if c.json || len(c.tmpl) > 0 {
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out, err := Format(c.json, c.tmpl, nodes)
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if err != nil {
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c.Ui.Error(err.Error())
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return 1
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}
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c.Ui.Output(out)
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return 0
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}
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// Return nothing if no nodes found
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if len(nodes) == 0 {
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return 0
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}
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// Format the nodes list
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out := make([]string, len(nodes)+1)
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out[0] = "ID|DC|Name|Class|"
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if c.verbose {
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out[0] += "Version|"
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}
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out[0] += "Drain|Status"
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if c.list_allocs {
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out[0] += "|Running Allocs"
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}
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for i, node := range nodes {
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out[i+1] = fmt.Sprintf("%s|%s|%s|%s",
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limit(node.ID, c.length),
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node.Datacenter,
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node.Name,
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node.NodeClass)
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if c.verbose {
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out[i+1] += fmt.Sprintf("|%s",
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node.Version)
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}
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out[i+1] += fmt.Sprintf("|%v|%s",
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node.Drain,
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node.Status)
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if c.list_allocs {
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numAllocs, err := getRunningAllocs(client, node.ID)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error querying node allocations: %s", err))
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return 1
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}
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out[i+1] += fmt.Sprintf("|%v",
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len(numAllocs))
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}
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}
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// Dump the output
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c.Ui.Output(formatList(out))
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return 0
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}
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// Query the specific node
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nodeID := ""
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if !c.self {
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nodeID = args[0]
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} else {
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var err error
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if nodeID, err = getLocalNodeID(client); err != nil {
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c.Ui.Error(err.Error())
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return 1
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}
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}
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if len(nodeID) == 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(nodeID)%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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nodeID = nodeID[:len(nodeID)-1]
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}
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nodes, _, err := client.Nodes().PrefixList(nodeID)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error querying node info: %s", err))
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return 1
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}
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// Return error if no nodes are found
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if len(nodes) == 0 {
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c.Ui.Error(fmt.Sprintf("No node(s) with prefix %q found", nodeID))
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return 1
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}
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if len(nodes) > 1 {
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// Format the nodes list that matches the prefix so that the user
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// can create a more specific request
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out := make([]string, len(nodes)+1)
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out[0] = "ID|DC|Name|Class|Drain|Status"
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for i, node := range nodes {
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out[i+1] = fmt.Sprintf("%s|%s|%s|%s|%v|%s",
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limit(node.ID, c.length),
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node.Datacenter,
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node.Name,
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node.NodeClass,
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node.Drain,
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node.Status)
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}
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// Dump the output
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c.Ui.Error(fmt.Sprintf("Prefix matched multiple nodes\n\n%s", formatList(out)))
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return 1
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}
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// Prefix lookup matched a single node
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node, _, err := client.Nodes().Info(nodes[0].ID, nil)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error querying node info: %s", err))
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return 1
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}
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// If output format is specified, format and output the data
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if c.json || len(c.tmpl) > 0 {
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out, err := Format(c.json, c.tmpl, node)
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if err != nil {
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c.Ui.Error(err.Error())
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return 1
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}
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c.Ui.Output(out)
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return 0
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}
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return c.formatNode(client, node)
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}
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func nodeDrivers(n *api.Node) []string {
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var drivers []string
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for k, v := range n.Attributes {
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// driver.docker = 1
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parts := strings.Split(k, ".")
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if len(parts) != 2 {
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continue
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} else if parts[0] != "driver" {
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continue
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} else if v != "1" {
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continue
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}
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drivers = append(drivers, parts[1])
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}
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sort.Strings(drivers)
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return drivers
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}
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func (c *NodeStatusCommand) formatNode(client *api.Client, node *api.Node) int {
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// Format the header output
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basic := []string{
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fmt.Sprintf("ID|%s", limit(node.ID, c.length)),
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fmt.Sprintf("Name|%s", node.Name),
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fmt.Sprintf("Class|%s", node.NodeClass),
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fmt.Sprintf("DC|%s", node.Datacenter),
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fmt.Sprintf("Drain|%v", node.Drain),
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fmt.Sprintf("Status|%s", node.Status),
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fmt.Sprintf("Drivers|%s", strings.Join(nodeDrivers(node), ",")),
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}
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if c.short {
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c.Ui.Output(c.Colorize().Color(formatKV(basic)))
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} else {
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// Get the host stats
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hostStats, nodeStatsErr := client.Nodes().Stats(node.ID, nil)
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if nodeStatsErr != nil {
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c.Ui.Output("")
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c.Ui.Error(fmt.Sprintf("error fetching node stats (HINT: ensure Client.Advertise.HTTP is set): %v", nodeStatsErr))
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}
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if hostStats != nil {
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uptime := time.Duration(hostStats.Uptime * uint64(time.Second))
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basic = append(basic, fmt.Sprintf("Uptime|%s", uptime.String()))
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}
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c.Ui.Output(c.Colorize().Color(formatKV(basic)))
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// Get list of running allocations on the node
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runningAllocs, err := getRunningAllocs(client, node.ID)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error querying node for running allocations: %s", err))
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return 1
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}
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allocatedResources := getAllocatedResources(client, runningAllocs, node)
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c.Ui.Output(c.Colorize().Color("\n[bold]Allocated Resources[reset]"))
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c.Ui.Output(formatList(allocatedResources))
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actualResources, err := getActualResources(client, runningAllocs, node)
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if err == nil {
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c.Ui.Output(c.Colorize().Color("\n[bold]Allocation Resource Utilization[reset]"))
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c.Ui.Output(formatList(actualResources))
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}
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hostResources, err := getHostResources(hostStats, node)
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if err != nil {
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c.Ui.Output("")
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c.Ui.Error(fmt.Sprintf("error fetching node stats (HINT: ensure Client.Advertise.HTTP is set): %v", err))
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}
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if err == nil {
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c.Ui.Output(c.Colorize().Color("\n[bold]Host Resource Utilization[reset]"))
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c.Ui.Output(formatList(hostResources))
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}
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if hostStats != nil && c.stats {
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c.Ui.Output(c.Colorize().Color("\n[bold]CPU Stats[reset]"))
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c.printCpuStats(hostStats)
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c.Ui.Output(c.Colorize().Color("\n[bold]Memory Stats[reset]"))
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c.printMemoryStats(hostStats)
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c.Ui.Output(c.Colorize().Color("\n[bold]Disk Stats[reset]"))
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c.printDiskStats(hostStats)
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}
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}
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nodeAllocs, _, err := client.Nodes().Allocations(node.ID, nil)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error querying node allocations: %s", err))
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return 1
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}
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c.Ui.Output(c.Colorize().Color("\n[bold]Allocations[reset]"))
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c.Ui.Output(formatAllocList(nodeAllocs, c.verbose, c.length))
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if c.verbose {
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c.formatAttributes(node)
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c.formatMeta(node)
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}
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return 0
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}
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func (c *NodeStatusCommand) formatAttributes(node *api.Node) {
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// Print the attributes
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keys := make([]string, len(node.Attributes))
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for k := range node.Attributes {
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keys = append(keys, k)
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}
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sort.Strings(keys)
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var attributes []string
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for _, k := range keys {
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if k != "" {
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attributes = append(attributes, fmt.Sprintf("%s|%s", k, node.Attributes[k]))
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}
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}
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c.Ui.Output(c.Colorize().Color("\n[bold]Attributes[reset]"))
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c.Ui.Output(formatKV(attributes))
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}
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func (c *NodeStatusCommand) formatMeta(node *api.Node) {
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// Print the meta
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keys := make([]string, 0, len(node.Meta))
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for k := range node.Meta {
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keys = append(keys, k)
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}
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sort.Strings(keys)
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var meta []string
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for _, k := range keys {
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if k != "" {
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meta = append(meta, fmt.Sprintf("%s|%s", k, node.Meta[k]))
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}
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}
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c.Ui.Output(c.Colorize().Color("\n[bold]Meta[reset]"))
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c.Ui.Output(formatKV(meta))
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}
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func (c *NodeStatusCommand) printCpuStats(hostStats *api.HostStats) {
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l := len(hostStats.CPU)
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for i, cpuStat := range hostStats.CPU {
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cpuStatsAttr := make([]string, 4)
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cpuStatsAttr[0] = fmt.Sprintf("CPU|%v", cpuStat.CPU)
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cpuStatsAttr[1] = fmt.Sprintf("User|%v%%", humanize.FormatFloat(floatFormat, cpuStat.User))
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cpuStatsAttr[2] = fmt.Sprintf("System|%v%%", humanize.FormatFloat(floatFormat, cpuStat.System))
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cpuStatsAttr[3] = fmt.Sprintf("Idle|%v%%", humanize.FormatFloat(floatFormat, cpuStat.Idle))
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c.Ui.Output(formatKV(cpuStatsAttr))
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if i+1 < l {
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c.Ui.Output("")
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}
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}
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}
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func (c *NodeStatusCommand) printMemoryStats(hostStats *api.HostStats) {
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memoryStat := hostStats.Memory
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memStatsAttr := make([]string, 4)
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memStatsAttr[0] = fmt.Sprintf("Total|%v", humanize.IBytes(memoryStat.Total))
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memStatsAttr[1] = fmt.Sprintf("Available|%v", humanize.IBytes(memoryStat.Available))
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memStatsAttr[2] = fmt.Sprintf("Used|%v", humanize.IBytes(memoryStat.Used))
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memStatsAttr[3] = fmt.Sprintf("Free|%v", humanize.IBytes(memoryStat.Free))
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c.Ui.Output(formatKV(memStatsAttr))
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}
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func (c *NodeStatusCommand) printDiskStats(hostStats *api.HostStats) {
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l := len(hostStats.DiskStats)
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for i, diskStat := range hostStats.DiskStats {
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diskStatsAttr := make([]string, 7)
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diskStatsAttr[0] = fmt.Sprintf("Device|%s", diskStat.Device)
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diskStatsAttr[1] = fmt.Sprintf("MountPoint|%s", diskStat.Mountpoint)
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diskStatsAttr[2] = fmt.Sprintf("Size|%s", humanize.IBytes(diskStat.Size))
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diskStatsAttr[3] = fmt.Sprintf("Used|%s", humanize.IBytes(diskStat.Used))
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diskStatsAttr[4] = fmt.Sprintf("Available|%s", humanize.IBytes(diskStat.Available))
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diskStatsAttr[5] = fmt.Sprintf("Used Percent|%v%%", humanize.FormatFloat(floatFormat, diskStat.UsedPercent))
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diskStatsAttr[6] = fmt.Sprintf("Inodes Percent|%v%%", humanize.FormatFloat(floatFormat, diskStat.InodesUsedPercent))
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c.Ui.Output(formatKV(diskStatsAttr))
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if i+1 < l {
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c.Ui.Output("")
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}
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}
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}
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// getRunningAllocs returns a slice of allocation id's running on the node
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func getRunningAllocs(client *api.Client, nodeID string) ([]*api.Allocation, error) {
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var allocs []*api.Allocation
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// Query the node allocations
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nodeAllocs, _, err := client.Nodes().Allocations(nodeID, nil)
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// Filter list to only running allocations
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for _, alloc := range nodeAllocs {
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if alloc.ClientStatus == "running" {
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allocs = append(allocs, alloc)
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}
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}
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return allocs, err
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}
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// getAllocatedResources returns the resource usage of the node.
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func getAllocatedResources(client *api.Client, runningAllocs []*api.Allocation, node *api.Node) []string {
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// Compute the total
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total := computeNodeTotalResources(node)
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// Get Resources
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var cpu, mem, disk, iops int
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for _, alloc := range runningAllocs {
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cpu += *alloc.Resources.CPU
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mem += *alloc.Resources.MemoryMB
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disk += *alloc.Resources.DiskMB
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iops += *alloc.Resources.IOPS
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}
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resources := make([]string, 2)
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resources[0] = "CPU|Memory|Disk|IOPS"
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resources[1] = fmt.Sprintf("%d/%d MHz|%s/%s|%s/%s|%d/%d",
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cpu,
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*total.CPU,
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humanize.IBytes(uint64(mem*bytesPerMegabyte)),
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humanize.IBytes(uint64(*total.MemoryMB*bytesPerMegabyte)),
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humanize.IBytes(uint64(disk*bytesPerMegabyte)),
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humanize.IBytes(uint64(*total.DiskMB*bytesPerMegabyte)),
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iops,
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*total.IOPS)
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return resources
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}
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// computeNodeTotalResources returns the total allocatable resources (resources
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// minus reserved)
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|
func computeNodeTotalResources(node *api.Node) api.Resources {
|
|
total := api.Resources{}
|
|
|
|
r := node.Resources
|
|
res := node.Reserved
|
|
if res == nil {
|
|
res = &api.Resources{}
|
|
}
|
|
total.CPU = helper.IntToPtr(*r.CPU - *res.CPU)
|
|
total.MemoryMB = helper.IntToPtr(*r.MemoryMB - *res.MemoryMB)
|
|
total.DiskMB = helper.IntToPtr(*r.DiskMB - *res.DiskMB)
|
|
total.IOPS = helper.IntToPtr(*r.IOPS - *res.IOPS)
|
|
return total
|
|
}
|
|
|
|
// getActualResources returns the actual resource usage of the allocations.
|
|
func getActualResources(client *api.Client, runningAllocs []*api.Allocation, node *api.Node) ([]string, error) {
|
|
// Compute the total
|
|
total := computeNodeTotalResources(node)
|
|
|
|
// Get Resources
|
|
var cpu float64
|
|
var mem uint64
|
|
for _, alloc := range runningAllocs {
|
|
// Make the call to the client to get the actual usage.
|
|
stats, err := client.Allocations().Stats(alloc, nil)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
cpu += stats.ResourceUsage.CpuStats.TotalTicks
|
|
mem += stats.ResourceUsage.MemoryStats.RSS
|
|
}
|
|
|
|
resources := make([]string, 2)
|
|
resources[0] = "CPU|Memory"
|
|
resources[1] = fmt.Sprintf("%v/%d MHz|%v/%v",
|
|
math.Floor(cpu),
|
|
*total.CPU,
|
|
humanize.IBytes(mem),
|
|
humanize.IBytes(uint64(*total.MemoryMB*bytesPerMegabyte)))
|
|
|
|
return resources, nil
|
|
}
|
|
|
|
// getHostResources returns the actual resource usage of the node.
|
|
func getHostResources(hostStats *api.HostStats, node *api.Node) ([]string, error) {
|
|
if hostStats == nil {
|
|
return nil, fmt.Errorf("actual resource usage not present")
|
|
}
|
|
var resources []string
|
|
|
|
// calculate disk usage
|
|
storageDevice := node.Attributes["unique.storage.volume"]
|
|
var diskUsed, diskSize uint64
|
|
var physical bool
|
|
for _, disk := range hostStats.DiskStats {
|
|
if disk.Device == storageDevice {
|
|
diskUsed = disk.Used
|
|
diskSize = disk.Size
|
|
physical = true
|
|
}
|
|
}
|
|
|
|
resources = make([]string, 2)
|
|
resources[0] = "CPU|Memory|Disk"
|
|
if physical {
|
|
resources[1] = fmt.Sprintf("%v/%d MHz|%s/%s|%s/%s",
|
|
math.Floor(hostStats.CPUTicksConsumed),
|
|
*node.Resources.CPU,
|
|
humanize.IBytes(hostStats.Memory.Used),
|
|
humanize.IBytes(hostStats.Memory.Total),
|
|
humanize.IBytes(diskUsed),
|
|
humanize.IBytes(diskSize),
|
|
)
|
|
} else {
|
|
// If non-physical device are used, output device name only,
|
|
// since nomad doesn't collect the stats data.
|
|
resources[1] = fmt.Sprintf("%v/%d MHz|%s/%s|(%s)",
|
|
math.Floor(hostStats.CPUTicksConsumed),
|
|
*node.Resources.CPU,
|
|
humanize.IBytes(hostStats.Memory.Used),
|
|
humanize.IBytes(hostStats.Memory.Total),
|
|
storageDevice,
|
|
)
|
|
}
|
|
return resources, nil
|
|
}
|