mirror of
https://github.com/kemko/nomad.git
synced 2026-01-01 16:05:42 +03:00
74cfdf55bb
Adds nomad monitor command. Like consul monitor, this command allows you to stream logs from a nomad agent in real time with a a specified log level add endpoint tests Upgrade go-hclog to latest version The current version of go-hclog pads log prefixes to equal lengths so info becomes [INFO ] and debug becomes [DEBUG]. This breaks hashicorp/logutils/level.go Check function. Upgrading to the latest version removes this padding and fixes log filtering that uses logutils Check
86 lines
1.7 KiB
Go
86 lines
1.7 KiB
Go
package command
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import (
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"fmt"
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"os"
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"os/signal"
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"strings"
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"syscall"
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)
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type MonitorCommand struct {
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Meta
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}
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func (c *MonitorCommand) Help() string {
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helpText := `
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Usage: nomad monitor [options]
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Shows recent log messages of a nomad agent, and attaches to the agent,
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outputting log messagse as they occur in real time. The monitor lets you
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listen for log levels that may be filtered out of the Nomad agent. For
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example your agent may only be logging at INFO level, but with the monitor
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command you can set -log-level DEBUG
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General Options:
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` + generalOptionsUsage()
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return strings.TrimSpace(helpText)
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}
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func (c *MonitorCommand) Synopsis() string {
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return "stream logs from a nomad agent"
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}
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func (c *MonitorCommand) Name() string { return "monitor" }
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func (c *MonitorCommand) Run(args []string) int {
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var logLevel string
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flags := c.Meta.FlagSet(c.Name(), FlagSetClient)
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flags.Usage = func() { c.Ui.Output(c.Help()) }
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flags.StringVar(&logLevel, "log-level", "", "")
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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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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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c.Ui.Error(commandErrorText(c))
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return 1
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}
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eventDoneCh := make(chan struct{})
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logCh, err := client.Agent().Monitor(logLevel, eventDoneCh, nil)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error starting monitor: %s", err))
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c.Ui.Error(commandErrorText(c))
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return 1
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}
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go func() {
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defer close(eventDoneCh)
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OUTER:
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for {
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select {
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case log := <-logCh:
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if log == "" {
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break OUTER
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}
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c.Ui.Output(log)
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}
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}
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}()
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signalCh := make(chan os.Signal, 1)
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signal.Notify(signalCh, os.Interrupt, syscall.SIGTERM)
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select {
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case <-signalCh:
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return 0
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}
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}
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