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Enhance network inspect to show all tasks, local & non-local, in swarm mode

Browse source 
Signed-off-by: Santhosh Manohar <santhosh@docker.com>
This commit is contained in:
Santhosh Manohar 2017-03-09 11:42:10 -08:00
parent 6708676464
commit 14f76a21db
13 changed files with 320 additions and 37 deletions
Download patch file Download diff file Expand all files Collapse all files

44
api/server/router/network/network_routes.go
View file

@ -4,10 +4,12 @@ import (
"encoding/json"
"fmt"
"net/http"
"strconv"
"strings"
"golang.org/x/net/context"
"github.com/docker/docker/api/errors"
"github.com/docker/docker/api/server/httputils"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/filters"
@ -65,7 +67,7 @@ SKIP:
// run across all the networks. Starting API version 1.27, this detailed
// info is available for network specific GET API (equivalent to inspect)
if versions.LessThan(httputils.VersionFromContext(ctx), "1.27") {
nr = n.buildDetailedNetworkResources(nw)
nr = n.buildDetailedNetworkResources(nw, false)
} else {
nr = n.buildNetworkResource(nw)
}
@ -85,6 +87,16 @@ func (n *networkRouter) getNetwork(ctx context.Context, w http.ResponseWriter, r
}
term := vars["id"]
var (
verbose bool
err error
)
if v := r.URL.Query().Get("verbose"); v != "" {
if verbose, err = strconv.ParseBool(v); err != nil {
err = fmt.Errorf("invalid value for verbose: %s", v)
return errors.NewBadRequestError(err)
}
}
// In case multiple networks have duplicate names, return error.
// TODO (yongtang): should we wrap with version here for backward compatibility?
@ -100,17 +112,17 @@ func (n *networkRouter) getNetwork(ctx context.Context, w http.ResponseWriter, r
nw := n.backend.GetNetworks()
for _, network := range nw {
if network.ID() == term {
return httputils.WriteJSON(w, http.StatusOK, *n.buildDetailedNetworkResources(network))
return httputils.WriteJSON(w, http.StatusOK, *n.buildDetailedNetworkResources(network, verbose))
}
if network.Name() == term {
// No need to check the ID collision here as we are still in
// local scope and the network ID is unique in this scope.
listByFullName[network.ID()] = *n.buildDetailedNetworkResources(network)
listByFullName[network.ID()] = *n.buildDetailedNetworkResources(network, verbose)
}
if strings.HasPrefix(network.ID(), term) {
// No need to check the ID collision here as we are still in
// local scope and the network ID is unique in this scope.
listByPartialID[network.ID()] = *n.buildDetailedNetworkResources(network)
listByPartialID[network.ID()] = *n.buildDetailedNetworkResources(network, verbose)
}
}
@ -294,7 +306,7 @@ func (n *networkRouter) buildNetworkResource(nw libnetwork.Network) *types.Netwo
return r
}
func (n *networkRouter) buildDetailedNetworkResources(nw libnetwork.Network) *types.NetworkResource {
func (n *networkRouter) buildDetailedNetworkResources(nw libnetwork.Network, verbose bool) *types.NetworkResource {
if nw == nil {
return &types.NetworkResource{}
}
@ -315,6 +327,28 @@ func (n *networkRouter) buildDetailedNetworkResources(nw libnetwork.Network) *ty
r.Containers[key] = buildEndpointResource(tmpID, e.Name(), ei)
}
if !verbose {
return r
}
services := nw.Info().Services()
r.Services = make(map[string]network.ServiceInfo)
for name, service := range services {
tasks := []network.Task{}
for _, t := range service.Tasks {
tasks = append(tasks, network.Task{
Name: t.Name,
EndpointID: t.EndpointID,
EndpointIP: t.EndpointIP,
Info: t.Info,
})
}
r.Services[name] = network.ServiceInfo{
VIP: service.VIP,
Ports: service.Ports,
Tasks: tasks,
LocalLBIndex: service.LocalLBIndex,
}
}
return r
}

5
api/swagger.yaml
View file

@ -6265,6 +6265,11 @@ paths:
description: "Network ID or name"
required: true
type: "string"
- name: "verbose"
in: "query"
description: "Detailed inspect output for troubleshooting"
type: "boolean"
default: false
tags: ["Network"]
delete:

16
api/types/network/network.go
View file

@ -60,6 +60,22 @@ type EndpointSettings struct {
MacAddress string
}
// Task carries the information about one backend task
type Task struct {
Name string
EndpointID string
EndpointIP string
Info map[string]string
}
// ServiceInfo represents service parameters with the list of service's tasks
type ServiceInfo struct {
VIP string
Ports []string
LocalLBIndex int
Tasks []Task
}
// Copy makes a deep copy of `EndpointSettings`
func (es *EndpointSettings) Copy() *EndpointSettings {
epCopy := *es

27
api/types/types.go
View file

@ -390,19 +390,20 @@ type MountPoint struct {
// NetworkResource is the body of the "get network" http response message
type NetworkResource struct {
Name string // Name is the requested name of the network
ID string `json:"Id"` // ID uniquely identifies a network on a single machine
Created time.Time // Created is the time the network created
Scope string // Scope describes the level at which the network exists (e.g. `global` for cluster-wide or `local` for machine level)
Driver string // Driver is the Driver name used to create the network (e.g. `bridge`, `overlay`)
EnableIPv6 bool // EnableIPv6 represents whether to enable IPv6
IPAM network.IPAM // IPAM is the network's IP Address Management
Internal bool // Internal represents if the network is used internal only
Attachable bool // Attachable represents if the global scope is manually attachable by regular containers from workers in swarm mode.
Containers map[string]EndpointResource // Containers contains endpoints belonging to the network
Options map[string]string // Options holds the network specific options to use for when creating the network
Labels map[string]string // Labels holds metadata specific to the network being created
Peers []network.PeerInfo `json:",omitempty"` // List of peer nodes for an overlay network
Name string // Name is the requested name of the network
ID string `json:"Id"` // ID uniquely identifies a network on a single machine
Created time.Time // Created is the time the network created
Scope string // Scope describes the level at which the network exists (e.g. `global` for cluster-wide or `local` for machine level)
Driver string // Driver is the Driver name used to create the network (e.g. `bridge`, `overlay`)
EnableIPv6 bool // EnableIPv6 represents whether to enable IPv6
IPAM network.IPAM // IPAM is the network's IP Address Management
Internal bool // Internal represents if the network is used internal only
Attachable bool // Attachable represents if the global scope is manually attachable by regular containers from workers in swarm mode.
Containers map[string]EndpointResource // Containers contains endpoints belonging to the network
Options map[string]string // Options holds the network specific options to use for when creating the network
Labels map[string]string // Labels holds metadata specific to the network being created
Peers []network.PeerInfo `json:",omitempty"` // List of peer nodes for an overlay network
Services map[string]network.ServiceInfo `json:",omitempty"`
}
// EndpointResource contains network resources allocated and used for a container in a network

8
cli/command/network/inspect.go
View file

@ -10,8 +10,9 @@ import (
)
type inspectOptions struct {
format string
names []string
format string
names []string
verbose bool
}
func newInspectCommand(dockerCli *command.DockerCli) *cobra.Command {
@ -28,6 +29,7 @@ func newInspectCommand(dockerCli *command.DockerCli) *cobra.Command {
}
cmd.Flags().StringVarP(&opts.format, "format", "f", "", "Format the output using the given Go template")
cmd.Flags().BoolVarP(&opts.verbose, "verbose", "v", false, "Verbose output for diagnostics")
return cmd
}
@ -38,7 +40,7 @@ func runInspect(dockerCli *command.DockerCli, opts inspectOptions) error {
ctx := context.Background()
getNetFunc := func(name string) (interface{}, []byte, error) {
return client.NetworkInspectWithRaw(ctx, name)
return client.NetworkInspectWithRaw(ctx, name, opts.verbose)
}
return inspect.Inspect(dockerCli.Out(), opts.names, opts.format, getNetFunc)

2
cli/command/stack/deploy_composefile.go
View file

@ -140,7 +140,7 @@ func validateExternalNetworks(
client := dockerCli.Client()
for _, networkName := range externalNetworks {
network, err := client.NetworkInspect(ctx, networkName)
network, err := client.NetworkInspect(ctx, networkName, false)
if err != nil {
if dockerclient.IsErrNetworkNotFound(err) {
return fmt.Errorf("network %q is declared as external, but could not be found. You need to create the network before the stack is deployed (with overlay driver)", networkName)

2
cli/command/system/inspect.go
View file

@ -67,7 +67,7 @@ func inspectImages(ctx context.Context, dockerCli *command.DockerCli) inspect.Ge
func inspectNetwork(ctx context.Context, dockerCli *command.DockerCli) inspect.GetRefFunc {
return func(ref string) (interface{}, []byte, error) {
return dockerCli.Client().NetworkInspectWithRaw(ctx, ref)
return dockerCli.Client().NetworkInspectWithRaw(ctx, ref, false)
}
}

4
client/interface.go
View file

@ -91,8 +91,8 @@ type NetworkAPIClient interface {
NetworkConnect(ctx context.Context, networkID, container string, config *network.EndpointSettings) error
NetworkCreate(ctx context.Context, name string, options types.NetworkCreate) (types.NetworkCreateResponse, error)
NetworkDisconnect(ctx context.Context, networkID, container string, force bool) error
NetworkInspect(ctx context.Context, networkID string) (types.NetworkResource, error)
NetworkInspectWithRaw(ctx context.Context, networkID string) (types.NetworkResource, []byte, error)
NetworkInspect(ctx context.Context, networkID string, verbose bool) (types.NetworkResource, error)
NetworkInspectWithRaw(ctx context.Context, networkID string, verbose bool) (types.NetworkResource, []byte, error)
NetworkList(ctx context.Context, options types.NetworkListOptions) ([]types.NetworkResource, error)
NetworkRemove(ctx context.Context, networkID string) error
NetworksPrune(ctx context.Context, pruneFilter filters.Args) (types.NetworksPruneReport, error)

19
client/network_inspect.go
View file

@ -5,21 +5,30 @@ import (
"encoding/json"
"io/ioutil"
"net/http"
"net/url"
"github.com/docker/docker/api/types"
"golang.org/x/net/context"
)
// NetworkInspect returns the information for a specific network configured in the docker host.
func (cli *Client) NetworkInspect(ctx context.Context, networkID string) (types.NetworkResource, error) {
networkResource, _, err := cli.NetworkInspectWithRaw(ctx, networkID)
func (cli *Client) NetworkInspect(ctx context.Context, networkID string, verbose bool) (types.NetworkResource, error) {
networkResource, _, err := cli.NetworkInspectWithRaw(ctx, networkID, verbose)
return networkResource, err
}
// NetworkInspectWithRaw returns the information for a specific network configured in the docker host and its raw representation.
func (cli *Client) NetworkInspectWithRaw(ctx context.Context, networkID string) (types.NetworkResource, []byte, error) {
var networkResource types.NetworkResource
resp, err := cli.get(ctx, "/networks/"+networkID, nil, nil)
func (cli *Client) NetworkInspectWithRaw(ctx context.Context, networkID string, verbose bool) (types.NetworkResource, []byte, error) {
var (
networkResource types.NetworkResource
resp serverResponse
err error
)
query := url.Values{}
if verbose {
query.Set("verbose", "true")
}
resp, err = cli.get(ctx, "/networks/"+networkID, query, nil)
if err != nil {
if resp.statusCode == http.StatusNotFound {
return networkResource, nil, networkNotFoundError{networkID}

39
client/network_inspect_test.go
View file

@ -10,6 +10,7 @@ import (
"testing"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/network"
"golang.org/x/net/context"
)
@ -18,7 +19,7 @@ func TestNetworkInspectError(t *testing.T) {
client: newMockClient(errorMock(http.StatusInternalServerError, "Server error")),
}
_, err := client.NetworkInspect(context.Background(), "nothing")
_, err := client.NetworkInspect(context.Background(), "nothing", false)
if err == nil || err.Error() != "Error response from daemon: Server error" {
t.Fatalf("expected a Server Error, got %v", err)
}
@ -29,7 +30,7 @@ func TestNetworkInspectContainerNotFound(t *testing.T) {
client: newMockClient(errorMock(http.StatusNotFound, "Server error")),
}
_, err := client.NetworkInspect(context.Background(), "unknown")
_, err := client.NetworkInspect(context.Background(), "unknown", false)
if err == nil || !IsErrNetworkNotFound(err) {
t.Fatalf("expected a networkNotFound error, got %v", err)
}
@ -46,9 +47,23 @@ func TestNetworkInspect(t *testing.T) {
return nil, fmt.Errorf("expected GET method, got %s", req.Method)
}
content, err := json.Marshal(types.NetworkResource{
Name: "mynetwork",
})
var (
content []byte
err error
)
if strings.HasPrefix(req.URL.RawQuery, "verbose=true") {
s := map[string]network.ServiceInfo{
"web": {},
}
content, err = json.Marshal(types.NetworkResource{
Name: "mynetwork",
Services: s,
})
} else {
content, err = json.Marshal(types.NetworkResource{
Name: "mynetwork",
})
}
if err != nil {
return nil, err
}
@ -59,11 +74,23 @@ func TestNetworkInspect(t *testing.T) {
}),
}
r, err := client.NetworkInspect(context.Background(), "network_id")
r, err := client.NetworkInspect(context.Background(), "network_id", false)
if err != nil {
t.Fatal(err)
}
if r.Name != "mynetwork" {
t.Fatalf("expected `mynetwork`, got %s", r.Name)
}
r, err = client.NetworkInspect(context.Background(), "network_id", true)
if err != nil {
t.Fatal(err)
}
if r.Name != "mynetwork" {
t.Fatalf("expected `mynetwork`, got %s", r.Name)
}
_, ok := r.Services["web"]
if !ok {
t.Fatalf("expected service `web` missing in the verbose output")
}
}

1
docs/api/version-history.md
View file

@ -17,6 +17,7 @@ keywords: "API, Docker, rcli, REST, documentation"
[Docker Engine API v1.27](https://docs.docker.com/engine/api/v1.27/) documentation
* Optional query parameter `verbose` for `GET /networks/(id or name)` will now list all services with all the tasks, including the non-local tasks on the given network.
* `GET /containers/(id or name)/attach/ws` now returns WebSocket in binary frame format for API version >= v1.27, and returns WebSocket in text frame format for API version< v1.27, for the purpose of backward-compatibility.
* `GET /networks` is optimised only to return list of all networks and network specific information. List of all containers attached to a specific network is removed from this API and is only available using the network specific `GET /networks/{network-id}.
* `GET /containers/json` now supports `publish` and `expose` filters to filter containers that expose or publish certain ports.

97
docs/reference/commandline/network_inspect.md
View file

@ -48,7 +48,7 @@ The `network inspect` command shows the containers, by id, in its
results. For networks backed by multi-host network driver, such as Overlay,
this command also shows the container endpoints in other hosts in the
cluster. These endpoints are represented as "ep-{endpoint-id}" in the output.
However, for swarm-scoped networks, only the endpoints that are local to the
However, for swarm mode networks, only the endpoints that are local to the
node are shown.
You can specify an alternate format to execute a given
@ -201,6 +201,101 @@ $ docker network inspect ingress
]
```
### Using `verbose` option for `network inspect`
`docker network inspect --verbose` for swarm mode overlay networks shows service-specific
details such as the service's VIP and port mappings. It also shows IPs of service tasks,
and the IPs of the nodes where the tasks are running.
Following is an example output for a overlay network `ov1` that has one service `s1`
attached to. service `s1` in this case has three replicas.
```bash
$ docker network inspect --verbose ov1
[
{
"Name": "ov1",
"Id": "ybmyjvao9vtzy3oorxbssj13b",
"Created": "2017-03-13T17:04:39.776106792Z",
"Scope": "swarm",
"Driver": "overlay",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "10.0.0.0/24",
"Gateway": "10.0.0.1"
}
]
},
"Internal": false,
"Attachable": false,
"Containers": {
"020403bd88a15f60747fd25d1ad5fa1272eb740e8a97fc547d8ad07b2f721c5e": {
"Name": "s1.1.pjn2ik0sfgkfzed3h0s00gs9o",
"EndpointID": "ad16946f416562d658f3bb30b9830d73ad91ccf6feae44411269cd0ff674714e",
"MacAddress": "02:42:0a:00:00:04",
"IPv4Address": "10.0.0.4/24",
"IPv6Address": ""
}
},
"Options": {
"com.docker.network.driver.overlay.vxlanid_list": "4097"
},
"Labels": {},
"Peers": [
{
"Name": "net-3-5d3cfd30a58c",
"IP": "192.168.33.13"
},
{
"Name": "net-1-6ecbc0040a73",
"IP": "192.168.33.11"
},
{
"Name": "net-2-fb80208efd75",
"IP": "192.168.33.12"
}
],
"Services": {
"s1": {
"VIP": "10.0.0.2",
"Ports": [],
"LocalLBIndex": 257,
"Tasks": [
{
"Name": "s1.2.q4hcq2aiiml25ubtrtg4q1txt",
"EndpointID": "040879b027e55fb658e8b60ae3b87c6cdac7d291e86a190a3b5ac6567b26511a",
"EndpointIP": "10.0.0.5",
"Info": {
"Host IP": "192.168.33.11"
}
},
{
"Name": "s1.3.yawl4cgkp7imkfx469kn9j6lm",
"EndpointID": "106edff9f120efe44068b834e1cddb5b39dd4a3af70211378b2f7a9e562bbad8",
"EndpointIP": "10.0.0.3",
"Info": {
"Host IP": "192.168.33.12"
}
},
{
"Name": "s1.1.pjn2ik0sfgkfzed3h0s00gs9o",
"EndpointID": "ad16946f416562d658f3bb30b9830d73ad91ccf6feae44411269cd0ff674714e",
"EndpointIP": "10.0.0.4",
"Info": {
"Host IP": "192.168.33.13"
}
}
]
}
}
}
]
```
## Related commands
* [network disconnect ](network_disconnect.md)

93
man/src/network/inspect.md
View file

@ -86,3 +86,96 @@ $ docker network inspect simple-network
}
]
```
`docker network inspect --verbose` for swarm mode overlay networks shows service-specific
details such as the service's VIP and port mappings. It also shows IPs of service tasks,
and the IPs of the nodes where the tasks are running.
Following is an example output for a overlay network `ov1` that has one service `s1`
attached to. service `s1` in this case has three replicas.
```bash
$ docker network inspect --verbose ov1
[
{
"Name": "ov1",
"Id": "ybmyjvao9vtzy3oorxbssj13b",
"Created": "2017-03-13T17:04:39.776106792Z",
"Scope": "swarm",
"Driver": "overlay",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "10.0.0.0/24",
"Gateway": "10.0.0.1"
}
]
},
"Internal": false,
"Attachable": false,
"Containers": {
"020403bd88a15f60747fd25d1ad5fa1272eb740e8a97fc547d8ad07b2f721c5e": {
"Name": "s1.1.pjn2ik0sfgkfzed3h0s00gs9o",
"EndpointID": "ad16946f416562d658f3bb30b9830d73ad91ccf6feae44411269cd0ff674714e",
"MacAddress": "02:42:0a:00:00:04",
"IPv4Address": "10.0.0.4/24",
"IPv6Address": ""
}
},
"Options": {
"com.docker.network.driver.overlay.vxlanid_list": "4097"
},
"Labels": {},
"Peers": [
{
"Name": "net-3-5d3cfd30a58c",
"IP": "192.168.33.13"
},
{
"Name": "net-1-6ecbc0040a73",
"IP": "192.168.33.11"
},
{
"Name": "net-2-fb80208efd75",
"IP": "192.168.33.12"
}
],
"Services": {
"s1": {
"VIP": "10.0.0.2",
"Ports": [],
"LocalLBIndex": 257,
"Tasks": [
{
"Name": "s1.2.q4hcq2aiiml25ubtrtg4q1txt",
"EndpointID": "040879b027e55fb658e8b60ae3b87c6cdac7d291e86a190a3b5ac6567b26511a",
"EndpointIP": "10.0.0.5",
"Info": {
"Host IP": "192.168.33.11"
}
},
{
"Name": "s1.3.yawl4cgkp7imkfx469kn9j6lm",
"EndpointID": "106edff9f120efe44068b834e1cddb5b39dd4a3af70211378b2f7a9e562bbad8",
"EndpointIP": "10.0.0.3",
"Info": {
"Host IP": "192.168.33.12"
}
},
{
"Name": "s1.1.pjn2ik0sfgkfzed3h0s00gs9o",
"EndpointID": "ad16946f416562d658f3bb30b9830d73ad91ccf6feae44411269cd0ff674714e",
"EndpointIP": "10.0.0.4",
"Info": {
"Host IP": "192.168.33.13"
}
}
]
}
}
}
]
```