mirror of https://github.com/hashicorp/consul
249 lines
6.1 KiB
Go
249 lines
6.1 KiB
Go
package instances
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import (
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"bytes"
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"flag"
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"fmt"
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"sort"
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"strings"
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"text/tabwriter"
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"github.com/hashicorp/consul/api"
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"github.com/hashicorp/consul/command/flags"
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"github.com/mitchellh/cli"
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)
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func New(ui cli.Ui) *cmd {
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c := &cmd{UI: ui}
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c.init()
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return c
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}
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type cmd struct {
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UI cli.Ui
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flags *flag.FlagSet
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http *flags.HTTPFlags
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help string
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// flags
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onlyBillable bool
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onlyConnect bool
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allDatacenters bool
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}
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func (c *cmd) init() {
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c.flags = flag.NewFlagSet("", flag.ContinueOnError)
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c.flags.BoolVar(&c.onlyBillable, "billable", false, "Display only billable service info. "+
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"Cannot be used with -connect.")
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c.flags.BoolVar(&c.onlyConnect, "connect", false, "Display only Connect service info."+
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"Cannot be used with -billable.")
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c.flags.BoolVar(&c.allDatacenters, "all-datacenters", false, "Display service counts from "+
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"all datacenters.")
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c.http = &flags.HTTPFlags{}
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flags.Merge(c.flags, c.http.ClientFlags())
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flags.Merge(c.flags, c.http.ServerFlags())
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c.help = flags.Usage(help, c.flags)
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}
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func (c *cmd) Run(args []string) int {
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if err := c.flags.Parse(args); err != nil {
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return 1
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}
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if l := len(c.flags.Args()); l > 0 {
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c.UI.Error(fmt.Sprintf("Too many arguments (expected 0, got %d)", l))
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return 1
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}
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if c.onlyBillable && c.onlyConnect {
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c.UI.Error("Cannot specify both -billable and -connect flags")
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return 1
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}
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// Create and test the HTTP client
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client, err := c.http.APIClient()
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if err != nil {
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c.UI.Error(fmt.Sprintf("Error connecting to Consul agent: %s", err))
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return 1
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}
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billableTotal := 0
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var datacenterBillableTotals []string
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usage, _, err := client.Operator().Usage(&api.QueryOptions{Global: c.allDatacenters})
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if err != nil {
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c.UI.Error(fmt.Sprintf("Error fetching usage information: %s", err))
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return 1
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}
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for dc, usage := range usage.Usage {
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billableTotal += usage.BillableServiceInstances
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datacenterBillableTotals = append(datacenterBillableTotals,
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fmt.Sprintf("%s Billable Service Instances: %d", dc, usage.BillableServiceInstances))
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}
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// Output billable service counts
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if !c.onlyConnect {
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c.UI.Output(fmt.Sprintf("Billable Service Instances Total: %d", billableTotal))
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sort.Strings(datacenterBillableTotals)
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for _, datacenterTotal := range datacenterBillableTotals {
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c.UI.Output(datacenterTotal)
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}
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c.UI.Output("\nBillable Services")
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billableOutput, err := formatServiceCounts(usage.Usage, true, c.allDatacenters)
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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(billableOutput + "\n")
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}
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// Output Connect service counts
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if !c.onlyBillable {
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c.UI.Output("Connect Services")
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connectOutput, err := formatServiceCounts(usage.Usage, false, c.allDatacenters)
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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(connectOutput)
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}
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return 0
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}
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func formatServiceCounts(usageStats map[string]api.ServiceUsage, billable, showDatacenter bool) (string, error) {
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var output bytes.Buffer
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tw := tabwriter.NewWriter(&output, 0, 2, 6, ' ', 0)
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var serviceCounts []serviceCount
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for datacenter, usage := range usageStats {
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if billable {
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serviceCounts = append(serviceCounts, getBillableInstanceCounts(usage, datacenter)...)
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} else {
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serviceCounts = append(serviceCounts, getConnectInstanceCounts(usage, datacenter)...)
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}
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}
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sortServiceCounts(serviceCounts)
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if showDatacenter {
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fmt.Fprintf(tw, "Datacenter\t")
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}
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if showPartitionNamespace {
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fmt.Fprintf(tw, "Partition\tNamespace\t")
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}
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if !billable {
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fmt.Fprintf(tw, "Type\t")
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} else {
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fmt.Fprintf(tw, "Services\t")
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}
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fmt.Fprintf(tw, "Service instances\n")
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serviceTotal := 0
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instanceTotal := 0
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for _, c := range serviceCounts {
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if showDatacenter {
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fmt.Fprintf(tw, "%s\t", c.datacenter)
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}
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if showPartitionNamespace {
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fmt.Fprintf(tw, "%s\t%s\t", c.partition, c.namespace)
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}
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if !billable {
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fmt.Fprintf(tw, "%s\t", c.serviceType)
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} else {
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fmt.Fprintf(tw, "%d\t", c.services)
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}
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fmt.Fprintf(tw, "%d\n", c.instanceCount)
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serviceTotal += c.services
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instanceTotal += c.instanceCount
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}
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// Show total counts if there's multiple rows because of datacenter or partition/ns view
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if showDatacenter || showPartitionNamespace {
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if showDatacenter {
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fmt.Fprint(tw, "\t")
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}
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if showPartitionNamespace {
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fmt.Fprint(tw, "\t\t")
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}
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fmt.Fprint(tw, "\t\n")
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fmt.Fprintf(tw, "Total")
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if showPartitionNamespace {
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fmt.Fprint(tw, "\t")
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if showDatacenter {
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fmt.Fprint(tw, "\t")
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}
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}
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if billable {
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fmt.Fprintf(tw, "\t%d\t%d\n", serviceTotal, instanceTotal)
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} else {
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fmt.Fprintf(tw, "\t\t%d\n", instanceTotal)
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}
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}
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if err := tw.Flush(); err != nil {
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return "", fmt.Errorf("Error flushing tabwriter: %s", err)
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}
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return strings.TrimSpace(output.String()), nil
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}
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type serviceCount struct {
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datacenter string
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partition string
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namespace string
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serviceType string
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instanceCount int
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services int
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}
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// Sort entries by datacenter > partition > namespace
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func sortServiceCounts(counts []serviceCount) {
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sort.Slice(counts, func(i, j int) bool {
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if counts[i].datacenter != counts[j].datacenter {
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return counts[i].datacenter < counts[j].datacenter
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}
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if counts[i].partition != counts[j].partition {
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return counts[i].partition < counts[j].partition
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}
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if counts[i].namespace != counts[j].namespace {
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return counts[i].namespace < counts[j].namespace
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}
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return counts[i].serviceType < counts[j].serviceType
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})
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}
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func (c *cmd) Synopsis() string {
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return synopsis
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}
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func (c *cmd) Help() string {
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return c.help
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}
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const (
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synopsis = "Display service instance usage information"
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help = `
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Usage: consul operator usage instances [options]
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Retrieves usage information about the number of services registered in a given
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datacenter. By default, the datacenter of the local agent is queried.
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To retrieve the service usage data:
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$ consul operator usage instances
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To show only billable service instance counts:
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$ consul operator usage instances -billable
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To show only connect service instance counts:
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$ consul operator usage instances -connect
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For a full list of options and examples, please see the Consul documentation.
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`
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)
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