mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
108 lines
2.9 KiB
Go
108 lines
2.9 KiB
Go
package client
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"io"
|
|
"strings"
|
|
"time"
|
|
|
|
Cli "github.com/docker/docker/cli"
|
|
"github.com/docker/docker/opts"
|
|
"github.com/docker/docker/pkg/jsonlog"
|
|
flag "github.com/docker/docker/pkg/mflag"
|
|
"github.com/docker/engine-api/types"
|
|
eventtypes "github.com/docker/engine-api/types/events"
|
|
"github.com/docker/engine-api/types/filters"
|
|
)
|
|
|
|
// CmdEvents prints a live stream of real time events from the server.
|
|
//
|
|
// Usage: docker events [OPTIONS]
|
|
func (cli *DockerCli) CmdEvents(args ...string) error {
|
|
cmd := Cli.Subcmd("events", nil, Cli.DockerCommands["events"].Description, true)
|
|
since := cmd.String([]string{"-since"}, "", "Show all events created since timestamp")
|
|
until := cmd.String([]string{"-until"}, "", "Stream events until this timestamp")
|
|
flFilter := opts.NewListOpts(nil)
|
|
cmd.Var(&flFilter, []string{"f", "-filter"}, "Filter output based on conditions provided")
|
|
cmd.Require(flag.Exact, 0)
|
|
|
|
cmd.ParseFlags(args, true)
|
|
|
|
eventFilterArgs := filters.NewArgs()
|
|
|
|
// Consolidate all filter flags, and sanity check them early.
|
|
// They'll get process in the daemon/server.
|
|
for _, f := range flFilter.GetAll() {
|
|
var err error
|
|
eventFilterArgs, err = filters.ParseFlag(f, eventFilterArgs)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
options := types.EventsOptions{
|
|
Since: *since,
|
|
Until: *until,
|
|
Filters: eventFilterArgs,
|
|
}
|
|
|
|
responseBody, err := cli.client.Events(options)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer responseBody.Close()
|
|
|
|
return streamEvents(responseBody, cli.out)
|
|
}
|
|
|
|
// streamEvents decodes prints the incoming events in the provided output.
|
|
func streamEvents(input io.Reader, output io.Writer) error {
|
|
return decodeEvents(input, func(event eventtypes.Message, err error) error {
|
|
if err != nil {
|
|
return err
|
|
}
|
|
printOutput(event, output)
|
|
return nil
|
|
})
|
|
}
|
|
|
|
type eventProcessor func(event eventtypes.Message, err error) error
|
|
|
|
func decodeEvents(input io.Reader, ep eventProcessor) error {
|
|
dec := json.NewDecoder(input)
|
|
for {
|
|
var event eventtypes.Message
|
|
err := dec.Decode(&event)
|
|
if err != nil && err == io.EOF {
|
|
break
|
|
}
|
|
|
|
if procErr := ep(event, err); procErr != nil {
|
|
return procErr
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// printOutput prints all types of event information.
|
|
// Each output includes the event type, actor id, name and action.
|
|
// Actor attributes are printed at the end if the actor has any.
|
|
func printOutput(event eventtypes.Message, output io.Writer) {
|
|
if event.TimeNano != 0 {
|
|
fmt.Fprintf(output, "%s ", time.Unix(0, event.TimeNano).Format(jsonlog.RFC3339NanoFixed))
|
|
} else if event.Time != 0 {
|
|
fmt.Fprintf(output, "%s ", time.Unix(event.Time, 0).Format(jsonlog.RFC3339NanoFixed))
|
|
}
|
|
|
|
fmt.Fprintf(output, "%s %s %s", event.Type, event.Action, event.Actor.ID)
|
|
|
|
if len(event.Actor.Attributes) > 0 {
|
|
var attrs []string
|
|
for k, v := range event.Actor.Attributes {
|
|
attrs = append(attrs, fmt.Sprintf("%s=%s", k, v))
|
|
}
|
|
fmt.Fprintf(output, " (%s)", strings.Join(attrs, ", "))
|
|
}
|
|
fmt.Fprint(output, "\n")
|
|
}
|