mirror of
https://github.com/hibiken/asynq.git
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119 lines
2.7 KiB
Go
119 lines
2.7 KiB
Go
// Copyright 2020 Kentaro Hibino. All rights reserved.
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// Use of this source code is governed by a MIT license
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// that can be found in the LICENSE file.
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package cmd
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import (
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"fmt"
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"io"
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"os"
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"sort"
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"strings"
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"time"
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"github.com/go-redis/redis/v7"
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"github.com/hibiken/asynq/internal/rdb"
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"github.com/spf13/cobra"
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"github.com/spf13/viper"
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)
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// psCmd represents the ps command
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var psCmd = &cobra.Command{
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Use: "ps",
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Short: "Shows all background worker processes",
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Long: `Ps (asynqmon ps) will show all background worker processes
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backed by the specified redis instance.
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The command shows the following for each process:
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* Host and PID of the process
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* Number of active workers out of worker pool
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* Queue configuration
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* State of the worker process ("running" | "stopped")
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* Time the process was started
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A "running" process is processing tasks in queues.
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A "stopped" process is no longer processing new tasks.`,
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Args: cobra.NoArgs,
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Run: ps,
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}
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func init() {
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rootCmd.AddCommand(psCmd)
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}
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func ps(cmd *cobra.Command, args []string) {
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r := rdb.NewRDB(redis.NewClient(&redis.Options{
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Addr: viper.GetString("uri"),
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DB: viper.GetInt("db"),
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Password: viper.GetString("password"),
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}))
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processes, err := r.ListProcesses()
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if err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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if len(processes) == 0 {
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fmt.Println("No processes")
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return
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}
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// sort by hostname and pid
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sort.Slice(processes, func(i, j int) bool {
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x, y := processes[i], processes[j]
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if x.Host != y.Host {
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return x.Host < y.Host
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}
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return x.PID < y.PID
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})
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// print processes
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cols := []string{"Host", "PID", "State", "Active Workers", "Queues", "Started"}
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printRows := func(w io.Writer, tmpl string) {
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for _, ps := range processes {
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fmt.Fprintf(w, tmpl,
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ps.Host, ps.PID, ps.Status,
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fmt.Sprintf("%d/%d", ps.ActiveWorkerCount, ps.Concurrency),
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formatQueues(ps.Queues), timeAgo(ps.Started))
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}
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}
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printTable(cols, printRows)
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}
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// timeAgo takes a time and returns a string of the format "<duration> ago".
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func timeAgo(since time.Time) string {
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d := time.Since(since).Round(time.Second)
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return fmt.Sprintf("%v ago", d)
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}
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func formatQueues(qmap map[string]int) string {
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// sort queues by priority and name
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type queue struct {
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name string
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priority int
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}
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var queues []*queue
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for qname, p := range qmap {
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queues = append(queues, &queue{qname, p})
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}
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sort.Slice(queues, func(i, j int) bool {
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x, y := queues[i], queues[j]
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if x.priority != y.priority {
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return x.priority > y.priority
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}
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return x.name < y.name
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})
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var b strings.Builder
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l := len(queues)
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for _, q := range queues {
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fmt.Fprintf(&b, "%s:%d", q.name, q.priority)
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l--
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if l > 0 {
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b.WriteString(" ")
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}
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}
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return b.String()
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}
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