62 lines
1 KiB
Go
62 lines
1 KiB
Go
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package main
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"github.com/nats-io/go-nats"
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"github.com/urfave/cli"
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)
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var eventsCommand = cli.Command{
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Name: "events",
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Usage: "display containerd events",
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Flags: []cli.Flag{
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cli.StringFlag{
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Name: "subject, s",
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Usage: "subjects filter",
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Value: "containerd.>",
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},
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},
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Action: func(context *cli.Context) error {
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nc, err := nats.Connect(nats.DefaultURL)
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if err != nil {
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return err
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}
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nec, err := nats.NewEncodedConn(nc, nats.JSON_ENCODER)
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if err != nil {
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nc.Close()
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return err
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}
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defer nec.Close()
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evCh := make(chan *nats.Msg, 64)
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sub, err := nec.Subscribe(context.String("subject"), func(e *nats.Msg) {
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evCh <- e
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})
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if err != nil {
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return err
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}
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defer sub.Unsubscribe()
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for {
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e, more := <-evCh
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if !more {
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break
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}
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var prettyJSON bytes.Buffer
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err := json.Indent(&prettyJSON, e.Data, "", "\t")
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if err != nil {
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fmt.Println(string(e.Data))
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} else {
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fmt.Println(prettyJSON.String())
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}
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}
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return nil
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},
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}
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