DockerCLI/command/node/ps.go

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package node
import (
"fmt"
"strings"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/cli"
"github.com/docker/docker/cli/command"
"github.com/docker/docker/cli/command/formatter"
"github.com/docker/docker/cli/command/idresolver"
"github.com/docker/docker/cli/command/task"
"github.com/docker/docker/opts"
"github.com/spf13/cobra"
"golang.org/x/net/context"
)
type psOptions struct {
nodeIDs []string
noResolve bool
noTrunc bool
quiet bool
format string
filter opts.FilterOpt
}
func newPsCommand(dockerCli command.Cli) *cobra.Command {
opts := psOptions{filter: opts.NewFilterOpt()}
cmd := &cobra.Command{
Use: "ps [OPTIONS] [NODE...]",
Short: "List tasks running on one or more nodes, defaults to current node",
Args: cli.RequiresMinArgs(0),
RunE: func(cmd *cobra.Command, args []string) error {
opts.nodeIDs = []string{"self"}
if len(args) != 0 {
opts.nodeIDs = args
}
return runPs(dockerCli, opts)
},
}
flags := cmd.Flags()
flags.BoolVar(&opts.noTrunc, "no-trunc", false, "Do not truncate output")
flags.BoolVar(&opts.noResolve, "no-resolve", false, "Do not map IDs to Names")
flags.VarP(&opts.filter, "filter", "f", "Filter output based on conditions provided")
flags.StringVar(&opts.format, "format", "", "Pretty-print tasks using a Go template")
flags.BoolVarP(&opts.quiet, "quiet", "q", false, "Only display task IDs")
return cmd
}
func runPs(dockerCli command.Cli, opts psOptions) error {
client := dockerCli.Client()
ctx := context.Background()
var (
errs []string
tasks []swarm.Task
)
for _, nodeID := range opts.nodeIDs {
nodeRef, err := Reference(ctx, client, nodeID)
if err != nil {
errs = append(errs, err.Error())
continue
}
node, _, err := client.NodeInspectWithRaw(ctx, nodeRef)
if err != nil {
errs = append(errs, err.Error())
continue
}
filter := opts.filter.Value()
filter.Add("node", node.ID)
nodeTasks, err := client.TaskList(ctx, types.TaskListOptions{Filters: filter})
if err != nil {
errs = append(errs, err.Error())
continue
}
tasks = append(tasks, nodeTasks...)
}
format := opts.format
if len(format) == 0 {
if dockerCli.ConfigFile() != nil && len(dockerCli.ConfigFile().TasksFormat) > 0 && !opts.quiet {
format = dockerCli.ConfigFile().TasksFormat
} else {
format = formatter.TableFormatKey
}
}
if err := task.Print(dockerCli, ctx, tasks, idresolver.New(client, opts.noResolve), !opts.noTrunc, opts.quiet, format); err != nil {
errs = append(errs, err.Error())
}
if len(errs) > 0 {
return fmt.Errorf("%s", strings.Join(errs, "\n"))
}
return nil
}