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Add --format to docker service ls

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This fix tries to improve the display of `docker service ls`
and adds `--format` flag to `docker service ls`.

In addition to `--format` flag, several other improvement:
1. Updates `docker stacks service`.
2. Adds `servicesFormat` to config file.

Related docs has been updated.

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
This commit is contained in:
Yong Tang 2017-01-26 13:08:07 -08:00
parent 354bd4aadd
commit 000f0403d9
8 changed files with 400 additions and 75 deletions
Download patch file Download diff file Expand all files Collapse all files

92
cli/command/formatter/service.go
View file

@ -5,9 +5,11 @@ import (
"strings"
"time"
distreference "github.com/docker/distribution/reference"
mounttypes "github.com/docker/docker/api/types/mount"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/cli/command/inspect"
"github.com/docker/docker/pkg/stringid"
units "github.com/docker/go-units"
)
@ -327,3 +329,93 @@ func (ctx *serviceInspectContext) EndpointMode() string {
func (ctx *serviceInspectContext) Ports() []swarm.PortConfig {
return ctx.Service.Endpoint.Ports
}
const (
defaultServiceTableFormat = "table {{.ID}}\t{{.Name}}\t{{.Mode}}\t{{.Replicas}}\t{{.Image}}"
serviceIDHeader = "ID"
modeHeader = "MODE"
replicasHeader = "REPLICAS"
)
// NewServiceListFormat returns a Format for rendering using a service Context
func NewServiceListFormat(source string, quiet bool) Format {
switch source {
case TableFormatKey:
if quiet {
return defaultQuietFormat
}
return defaultServiceTableFormat
case RawFormatKey:
if quiet {
return `id: {{.ID}}`
}
return `id: {{.ID}}\nname: {{.Name}}\nmode: {{.Mode}}\nreplicas: {{.Replicas}}\nimage: {{.Image}}\n`
}
return Format(source)
}
// ServiceListInfo stores the information about mode and replicas to be used by template
type ServiceListInfo struct {
Mode string
Replicas string
}
// ServiceListWrite writes the context
func ServiceListWrite(ctx Context, services []swarm.Service, info map[string]ServiceListInfo) error {
render := func(format func(subContext subContext) error) error {
for _, service := range services {
serviceCtx := &serviceContext{service: service, mode: info[service.ID].Mode, replicas: info[service.ID].Replicas}
if err := format(serviceCtx); err != nil {
return err
}
}
return nil
}
return ctx.Write(&serviceContext{}, render)
}
type serviceContext struct {
HeaderContext
service swarm.Service
mode string
replicas string
}
func (c *serviceContext) MarshalJSON() ([]byte, error) {
return marshalJSON(c)
}
func (c *serviceContext) ID() string {
c.AddHeader(serviceIDHeader)
return stringid.TruncateID(c.service.ID)
}
func (c *serviceContext) Name() string {
c.AddHeader(nameHeader)
return c.service.Spec.Name
}
func (c *serviceContext) Mode() string {
c.AddHeader(modeHeader)
return c.mode
}
func (c *serviceContext) Replicas() string {
c.AddHeader(replicasHeader)
return c.replicas
}
func (c *serviceContext) Image() string {
c.AddHeader(imageHeader)
image := c.service.Spec.TaskTemplate.ContainerSpec.Image
if ref, err := distreference.ParseNamed(image); err == nil {
// update image string for display
namedTagged, ok := ref.(distreference.NamedTagged)
if ok {
image = namedTagged.Name() + ":" + namedTagged.Tag()
}
}
return image
}

177
cli/command/formatter/service_test.go Normal file
View file

@ -0,0 +1,177 @@
package formatter
import (
"bytes"
"encoding/json"
"strings"
"testing"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/pkg/testutil/assert"
)
func TestServiceContextWrite(t *testing.T) {
cases := []struct {
context Context
expected string
}{
// Errors
{
Context{Format: "{{InvalidFunction}}"},
`Template parsing error: template: :1: function "InvalidFunction" not defined
`,
},
{
Context{Format: "{{nil}}"},
`Template parsing error: template: :1:2: executing "" at <nil>: nil is not a command
`,
},
// Table format
{
Context{Format: NewServiceListFormat("table", false)},
`ID NAME MODE REPLICAS IMAGE
id_baz baz global 2/4
id_bar bar replicated 2/4
`,
},
{
Context{Format: NewServiceListFormat("table", true)},
`id_baz
id_bar
`,
},
{
Context{Format: NewServiceListFormat("table {{.Name}}", false)},
`NAME
baz
bar
`,
},
{
Context{Format: NewServiceListFormat("table {{.Name}}", true)},
`NAME
baz
bar
`,
},
// Raw Format
{
Context{Format: NewServiceListFormat("raw", false)},
`id: id_baz
name: baz
mode: global
replicas: 2/4
image:
id: id_bar
name: bar
mode: replicated
replicas: 2/4
image:
`,
},
{
Context{Format: NewServiceListFormat("raw", true)},
`id: id_baz
id: id_bar
`,
},
// Custom Format
{
Context{Format: NewServiceListFormat("{{.Name}}", false)},
`baz
bar
`,
},
}
for _, testcase := range cases {
services := []swarm.Service{
{ID: "id_baz", Spec: swarm.ServiceSpec{Annotations: swarm.Annotations{Name: "baz"}}},
{ID: "id_bar", Spec: swarm.ServiceSpec{Annotations: swarm.Annotations{Name: "bar"}}},
}
info := map[string]ServiceListInfo{
"id_baz": {
Mode: "global",
Replicas: "2/4",
},
"id_bar": {
Mode: "replicated",
Replicas: "2/4",
},
}
out := bytes.NewBufferString("")
testcase.context.Output = out
err := ServiceListWrite(testcase.context, services, info)
if err != nil {
assert.Error(t, err, testcase.expected)
} else {
assert.Equal(t, out.String(), testcase.expected)
}
}
}
func TestServiceContextWriteJSON(t *testing.T) {
services := []swarm.Service{
{ID: "id_baz", Spec: swarm.ServiceSpec{Annotations: swarm.Annotations{Name: "baz"}}},
{ID: "id_bar", Spec: swarm.ServiceSpec{Annotations: swarm.Annotations{Name: "bar"}}},
}
info := map[string]ServiceListInfo{
"id_baz": {
Mode: "global",
Replicas: "2/4",
},
"id_bar": {
Mode: "replicated",
Replicas: "2/4",
},
}
expectedJSONs := []map[string]interface{}{
{"ID": "id_baz", "Name": "baz", "Mode": "global", "Replicas": "2/4", "Image": ""},
{"ID": "id_bar", "Name": "bar", "Mode": "replicated", "Replicas": "2/4", "Image": ""},
}
out := bytes.NewBufferString("")
err := ServiceListWrite(Context{Format: "{{json .}}", Output: out}, services, info)
if err != nil {
t.Fatal(err)
}
for i, line := range strings.Split(strings.TrimSpace(out.String()), "\n") {
t.Logf("Output: line %d: %s", i, line)
var m map[string]interface{}
if err := json.Unmarshal([]byte(line), &m); err != nil {
t.Fatal(err)
}
assert.DeepEqual(t, m, expectedJSONs[i])
}
}
func TestServiceContextWriteJSONField(t *testing.T) {
services := []swarm.Service{
{ID: "id_baz", Spec: swarm.ServiceSpec{Annotations: swarm.Annotations{Name: "baz"}}},
{ID: "id_bar", Spec: swarm.ServiceSpec{Annotations: swarm.Annotations{Name: "bar"}}},
}
info := map[string]ServiceListInfo{
"id_baz": {
Mode: "global",
Replicas: "2/4",
},
"id_bar": {
Mode: "replicated",
Replicas: "2/4",
},
}
out := bytes.NewBufferString("")
err := ServiceListWrite(Context{Format: "{{json .Name}}", Output: out}, services, info)
if err != nil {
t.Fatal(err)
}
for i, line := range strings.Split(strings.TrimSpace(out.String()), "\n") {
t.Logf("Output: line %d: %s", i, line)
var s string
if err := json.Unmarshal([]byte(line), &s); err != nil {
t.Fatal(err)
}
assert.Equal(t, s, services[i].Spec.Name)
}
}

98
cli/command/service/list.go
View file

@ -2,27 +2,21 @@ package service
import (
"fmt"
"io"
"text/tabwriter"
distreference "github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/filters"
"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/opts"
"github.com/docker/docker/pkg/stringid"
"github.com/spf13/cobra"
"golang.org/x/net/context"
)
const (
listItemFmt = "%s\t%s\t%s\t%s\t%s\n"
)
type listOptions struct {
quiet bool
format string
filter opts.FilterOpt
}
@ -41,6 +35,7 @@ func newListCommand(dockerCli *command.DockerCli) *cobra.Command {
flags := cmd.Flags()
flags.BoolVarP(&opts.quiet, "quiet", "q", false, "Only display IDs")
flags.StringVar(&opts.format, "format", "", "Pretty-print services using a Go template")
flags.VarP(&opts.filter, "filter", "f", "Filter output based on conditions provided")
return cmd
@ -49,13 +44,13 @@ func newListCommand(dockerCli *command.DockerCli) *cobra.Command {
func runList(dockerCli *command.DockerCli, opts listOptions) error {
ctx := context.Background()
client := dockerCli.Client()
out := dockerCli.Out()
services, err := client.ServiceList(ctx, types.ServiceListOptions{Filters: opts.filter.Value()})
if err != nil {
return err
}
info := map[string]formatter.ServiceListInfo{}
if len(services) > 0 && !opts.quiet {
// only non-empty services and not quiet, should we call TaskList and NodeList api
taskFilter := filters.NewArgs()
@ -73,20 +68,30 @@ func runList(dockerCli *command.DockerCli, opts listOptions) error {
return err
}
PrintNotQuiet(out, services, nodes, tasks)
} else if !opts.quiet {
// no services and not quiet, print only one line with columns ID, NAME, MODE, REPLICAS...
PrintNotQuiet(out, services, []swarm.Node{}, []swarm.Task{})
} else {
PrintQuiet(out, services)
info = GetServicesStatus(services, nodes, tasks)
}
return nil
format := opts.format
if len(format) == 0 {
if len(dockerCli.ConfigFile().ServicesFormat) > 0 && !opts.quiet {
format = dockerCli.ConfigFile().ServicesFormat
} else {
format = formatter.TableFormatKey
}
}
servicesCtx := formatter.Context{
Output: dockerCli.Out(),
Format: formatter.NewServiceListFormat(format, opts.quiet),
}
return formatter.ServiceListWrite(servicesCtx, services, info)
}
// PrintNotQuiet shows service list in a non-quiet way.
// Besides this, command `docker stack services xxx` will call this, too.
func PrintNotQuiet(out io.Writer, services []swarm.Service, nodes []swarm.Node, tasks []swarm.Task) {
// GetServicesStatus returns a map of mode and replicas
func GetServicesStatus(services []swarm.Service, nodes []swarm.Node, tasks []swarm.Task) map[string]formatter.ServiceListInfo {
running := map[string]int{}
tasksNoShutdown := map[string]int{}
activeNodes := make(map[string]struct{})
for _, n := range nodes {
if n.Status.State != swarm.NodeStateDown {
@ -94,9 +99,6 @@ func PrintNotQuiet(out io.Writer, services []swarm.Service, nodes []swarm.Node,
}
}
running := map[string]int{}
tasksNoShutdown := map[string]int{}
for _, task := range tasks {
if task.DesiredState != swarm.TaskStateShutdown {
tasksNoShutdown[task.ServiceID]++
@ -107,52 +109,20 @@ func PrintNotQuiet(out io.Writer, services []swarm.Service, nodes []swarm.Node,
}
}
printTable(out, services, running, tasksNoShutdown)
}
func printTable(out io.Writer, services []swarm.Service, running, tasksNoShutdown map[string]int) {
writer := tabwriter.NewWriter(out, 0, 4, 2, ' ', 0)
// Ignore flushing errors
defer writer.Flush()
fmt.Fprintf(writer, listItemFmt, "ID", "NAME", "MODE", "REPLICAS", "IMAGE")
info := map[string]formatter.ServiceListInfo{}
for _, service := range services {
mode := ""
replicas := ""
info[service.ID] = formatter.ServiceListInfo{}
if service.Spec.Mode.Replicated != nil && service.Spec.Mode.Replicated.Replicas != nil {
mode = "replicated"
replicas = fmt.Sprintf("%d/%d", running[service.ID], *service.Spec.Mode.Replicated.Replicas)
info[service.ID] = formatter.ServiceListInfo{
Mode: "replicated",
Replicas: fmt.Sprintf("%d/%d", running[service.ID], *service.Spec.Mode.Replicated.Replicas),
}
} else if service.Spec.Mode.Global != nil {
mode = "global"
replicas = fmt.Sprintf("%d/%d", running[service.ID], tasksNoShutdown[service.ID])
}
image := service.Spec.TaskTemplate.ContainerSpec.Image
ref, err := distreference.ParseNamed(image)
if err == nil {
// update image string for display
namedTagged, ok := ref.(distreference.NamedTagged)
if ok {
image = namedTagged.Name() + ":" + namedTagged.Tag()
info[service.ID] = formatter.ServiceListInfo{
Mode: "global",
Replicas: fmt.Sprintf("%d/%d", running[service.ID], tasksNoShutdown[service.ID]),
}
}
fmt.Fprintf(
writer,
listItemFmt,
stringid.TruncateID(service.ID),
service.Spec.Name,
mode,
replicas,
image)
}
}
// PrintQuiet shows service list in a quiet way.
// Besides this, command `docker stack services xxx` will call this, too.
func PrintQuiet(out io.Writer, services []swarm.Service) {
for _, service := range services {
fmt.Fprintln(out, service.ID)
}
return info
}

28
cli/command/stack/services.go
View file

@ -9,6 +9,7 @@ import (
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/cli"
"github.com/docker/docker/cli/command"
"github.com/docker/docker/cli/command/formatter"
"github.com/docker/docker/cli/command/service"
"github.com/docker/docker/opts"
"github.com/spf13/cobra"
@ -16,6 +17,7 @@ import (
type servicesOptions struct {
quiet bool
format string
filter opts.FilterOpt
namespace string
}
@ -34,6 +36,7 @@ func newServicesCommand(dockerCli *command.DockerCli) *cobra.Command {
}
flags := cmd.Flags()
flags.BoolVarP(&opts.quiet, "quiet", "q", false, "Only display IDs")
flags.StringVar(&opts.format, "format", "", "Pretty-print services using a Go template")
flags.VarP(&opts.filter, "filter", "f", "Filter output based on conditions provided")
return cmd
@ -57,9 +60,8 @@ func runServices(dockerCli *command.DockerCli, opts servicesOptions) error {
return nil
}
if opts.quiet {
service.PrintQuiet(out, services)
} else {
info := map[string]formatter.ServiceListInfo{}
if !opts.quiet {
taskFilter := filters.NewArgs()
for _, service := range services {
taskFilter.Add("service", service.ID)
@ -69,11 +71,27 @@ func runServices(dockerCli *command.DockerCli, opts servicesOptions) error {
if err != nil {
return err
}
nodes, err := client.NodeList(ctx, types.NodeListOptions{})
if err != nil {
return err
}
service.PrintNotQuiet(out, services, nodes, tasks)
info = service.GetServicesStatus(services, nodes, tasks)
}
return nil
format := opts.format
if len(format) == 0 {
if len(dockerCli.ConfigFile().ServicesFormat) > 0 && !opts.quiet {
format = dockerCli.ConfigFile().ServicesFormat
} else {
format = formatter.TableFormatKey
}
}
servicesCtx := formatter.Context{
Output: dockerCli.Out(),
Format: formatter.NewServiceListFormat(format, opts.quiet),
}
return formatter.ServiceListWrite(servicesCtx, services, info)
}

1
cli/config/configfile/file.go
View file

@ -35,6 +35,7 @@ type ConfigFile struct {
CredentialHelpers map[string]string `json:"credHelpers,omitempty"`
Filename string `json:"-"` // Note: for internal use only
ServiceInspectFormat string `json:"serviceInspectFormat,omitempty"`
ServicesFormat string `json:"servicesFormat,omitempty"`
}
// LegacyLoadFromReader reads the non-nested configuration data given and sets up the

8
docs/reference/commandline/cli.md
View file

@ -137,6 +137,13 @@ Docker's client uses this property. If this property is not set, the client
falls back to the default table format. For a list of supported formatting
directives, see the [**Formatting** section in the `docker plugin ls` documentation](plugin_ls.md)
The property `servicesFormat` specifies the default format for `docker
service ls` output. When the `--format` flag is not provided with the
`docker service ls` command, Docker's client uses this property. If this
property is not set, the client falls back to the default json format. For a
list of supported formatting directives, see the
[**Formatting** section in the `docker service ls` documentation](service_ls.md)
The property `serviceInspectFormat` specifies the default format for `docker
service inspect` output. When the `--format` flag is not provided with the
`docker service inspect` command, Docker's client uses this property. If this
@ -194,6 +201,7 @@ Following is a sample `config.json` file:
"imagesFormat": "table {{.ID}}\\t{{.Repository}}\\t{{.Tag}}\\t{{.CreatedAt}}",
"pluginsFormat": "table {{.ID}}\t{{.Name}}\t{{.Enabled}}",
"statsFormat": "table {{.Container}}\t{{.CPUPerc}}\t{{.MemUsage}}",
"servicesFormat": "table {{.ID}}\t{{.Name}}\t{{.Mode}}",
"serviceInspectFormat": "pretty",
"detachKeys": "ctrl-e,e",
"credsStore": "secretservice",

31
docs/reference/commandline/service_ls.md
View file

@ -24,7 +24,8 @@ Aliases:
ls, list
Options:
-f, --filter value Filter output based on conditions provided
-f, --filter filter Filter output based on conditions provided
--format string Pretty-print services using a Go template
--help Print usage
-q, --quiet Only display IDs
```
@ -103,6 +104,34 @@ ID NAME MODE REPLICAS IMAGE
0bcjwfh8ychr redis replicated 1/1 redis:3.0.6
```
## Formatting
The formatting options (`--format`) pretty-prints services output
using a Go template.
Valid placeholders for the Go template are listed below:
Placeholder | Description
------------|------------------------------------------------------------------------------------------
`.ID` | Service ID
`.Name` | Service name
`.Mode` | Service mode (replicated, global)
`.Replicas` | Service replicas
`.Image` | Service image
When using the `--format` option, the `service ls` command will either
output the data exactly as the template declares or, when using the
`table` directive, includes column headers as well.
The following example uses a template without headers and outputs the
`ID`, `Mode`, and `Replicas` entries separated by a colon for all services:
```bash
$ docker service ls --format "{{.ID}}: {{.Mode}} {{.Replicas}}"
0zmvwuiu3vue: replicated 10/10
fm6uf97exkul: global 5/5
```
## Related information
* [service create](service_create.md)

32
docs/reference/commandline/stack_services.md
View file

@ -22,7 +22,8 @@ Usage: docker stack services [OPTIONS] STACK
List the services in the stack
Options:
-f, --filter value Filter output based on conditions provided
-f, --filter filter Filter output based on conditions provided
--format string Pretty-print services using a Go template
--help Print usage
-q, --quiet Only display IDs
```
@ -62,6 +63,35 @@ The currently supported filters are:
* name (`--filter name=myapp_web`)
* label (`--filter label=key=value`)
## Formatting
The formatting options (`--format`) pretty-prints services output
using a Go template.
Valid placeholders for the Go template are listed below:
Placeholder | Description
------------|------------------------------------------------------------------------------------------
`.ID` | Service ID
`.Name` | Service name
`.Mode` | Service mode (replicated, global)
`.Replicas` | Service replicas
`.Image` | Service image
When using the `--format` option, the `stack services` command will either
output the data exactly as the template declares or, when using the
`table` directive, includes column headers as well.
The following example uses a template without headers and outputs the
`ID`, `Mode`, and `Replicas` entries separated by a colon for all services:
```bash
$ docker stack services --format "{{.ID}}: {{.Mode}} {{.Replicas}}"
0zmvwuiu3vue: replicated 10/10
fm6uf97exkul: global 5/5
```
## Related information
* [stack deploy](stack_deploy.md)