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moby/integration-cli/docker_api_network_test.go
Madhu Venugopal cc6aece1fd IPAM API & UX 
introduced --subnet, --ip-range and --gateway options in docker network
command. Also, user can allocate driver specific ip-address if any using
the --aux-address option.
Supports multiple subnets per network and also sharing ip range
across networks if the network-driver and ipam-driver supports it.
Example, Bridge driver doesnt support sharing same ip range across
networks.

Signed-off-by: Madhu Venugopal <madhu@docker.com>
2015-10-13 11:03:03 -07:00

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package main
import (
"encoding/json"
"fmt"
"net"
"net/http"
"net/url"
"strings"
"github.com/docker/docker/api/types"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/pkg/parsers/filters"
"github.com/go-check/check"
)
func (s *DockerSuite) TestApiNetworkGetDefaults(c *check.C) {
// By default docker daemon creates 3 networks. check if they are present
defaults := []string{"bridge", "host", "none"}
for _, nn := range defaults {
c.Assert(isNetworkAvailable(c, nn), check.Equals, true)
}
}
func (s *DockerSuite) TestApiNetworkCreateDelete(c *check.C) {
// Create a network
name := "testnetwork"
config := types.NetworkCreate{
Name: name,
CheckDuplicate: true,
}
id := createNetwork(c, config, true)
c.Assert(isNetworkAvailable(c, name), check.Equals, true)
// POST another network with same name and CheckDuplicate must fail
createNetwork(c, config, false)
// delete the network and make sure it is deleted
deleteNetwork(c, id, true)
c.Assert(isNetworkAvailable(c, name), check.Equals, false)
}
func (s *DockerSuite) TestApiNetworkFilter(c *check.C) {
nr := getNetworkResource(c, getNetworkIDByName(c, "bridge"))
c.Assert(nr.Name, check.Equals, "bridge")
}
func (s *DockerSuite) TestApiNetworkInspect(c *check.C) {
// Inspect default bridge network
nr := getNetworkResource(c, "bridge")
c.Assert(nr.Name, check.Equals, "bridge")
// run a container and attach it to the default bridge network
out, _ := dockerCmd(c, "run", "-d", "--name", "test", "busybox", "top")
containerID := strings.TrimSpace(out)
containerIP := findContainerIP(c, "test")
// inspect default bridge network again and make sure the container is connected
nr = getNetworkResource(c, nr.ID)
c.Assert(nr.Driver, check.Equals, "bridge")
c.Assert(nr.Scope, check.Equals, "local")
c.Assert(nr.IPAM.Driver, check.Equals, "default")
c.Assert(len(nr.Containers), check.Equals, 1)
c.Assert(nr.Containers[containerID], check.NotNil)
ip, _, err := net.ParseCIDR(nr.Containers[containerID].IPv4Address)
c.Assert(err, check.IsNil)
c.Assert(ip.String(), check.Equals, containerIP)
// IPAM configuration inspect
ipam := network.IPAM{
Driver: "default",
Config: []network.IPAMConfig{{Subnet: "172.28.0.0/16", IPRange: "172.28.5.0/24", Gateway: "172.28.5.254"}},
}
config := types.NetworkCreate{
Name: "br0",
Driver: "bridge",
IPAM: ipam,
}
id0 := createNetwork(c, config, true)
c.Assert(isNetworkAvailable(c, "br0"), check.Equals, true)
nr = getNetworkResource(c, id0)
c.Assert(len(nr.IPAM.Config), check.Equals, 1)
c.Assert(nr.IPAM.Config[0].Subnet, check.Equals, "172.28.0.0/16")
c.Assert(nr.IPAM.Config[0].IPRange, check.Equals, "172.28.5.0/24")
c.Assert(nr.IPAM.Config[0].Gateway, check.Equals, "172.28.5.254")
// delete the network and make sure it is deleted
deleteNetwork(c, id0, true)
c.Assert(isNetworkAvailable(c, "br0"), check.Equals, false)
}
func (s *DockerSuite) TestApiNetworkConnectDisconnect(c *check.C) {
// Create test network
name := "testnetwork"
config := types.NetworkCreate{
Name: name,
}
id := createNetwork(c, config, true)
nr := getNetworkResource(c, id)
c.Assert(nr.Name, check.Equals, name)
c.Assert(nr.ID, check.Equals, id)
c.Assert(len(nr.Containers), check.Equals, 0)
// run a container
out, _ := dockerCmd(c, "run", "-d", "--name", "test", "busybox", "top")
containerID := strings.TrimSpace(out)
// connect the container to the test network
connectNetwork(c, nr.ID, containerID)
// inspect the network to make sure container is connected
nr = getNetworkResource(c, nr.ID)
c.Assert(len(nr.Containers), check.Equals, 1)
c.Assert(nr.Containers[containerID], check.NotNil)
// check if container IP matches network inspect
ip, _, err := net.ParseCIDR(nr.Containers[containerID].IPv4Address)
c.Assert(err, check.IsNil)
containerIP := findContainerIP(c, "test")
c.Assert(ip.String(), check.Equals, containerIP)
// disconnect container from the network
disconnectNetwork(c, nr.ID, containerID)
nr = getNetworkResource(c, nr.ID)
c.Assert(nr.Name, check.Equals, name)
c.Assert(len(nr.Containers), check.Equals, 0)
// delete the network
deleteNetwork(c, nr.ID, true)
}
func (s *DockerSuite) TestApiNetworkIpamMultipleBridgeNetworks(c *check.C) {
// test0 bridge network
ipam0 := network.IPAM{
Driver: "default",
Config: []network.IPAMConfig{{Subnet: "192.178.0.0/16", IPRange: "192.178.128.0/17", Gateway: "192.178.138.100"}},
}
config0 := types.NetworkCreate{
Name: "test0",
Driver: "bridge",
IPAM: ipam0,
}
id0 := createNetwork(c, config0, true)
c.Assert(isNetworkAvailable(c, "test0"), check.Equals, true)
ipam1 := network.IPAM{
Driver: "default",
Config: []network.IPAMConfig{{Subnet: "192.178.128.0/17", Gateway: "192.178.128.1"}},
}
// test1 bridge network overlaps with test0
config1 := types.NetworkCreate{
Name: "test1",
Driver: "bridge",
IPAM: ipam1,
}
createNetwork(c, config1, false)
c.Assert(isNetworkAvailable(c, "test1"), check.Equals, false)
ipam2 := network.IPAM{
Driver: "default",
Config: []network.IPAMConfig{{Subnet: "192.169.0.0/16", Gateway: "192.169.100.100"}},
}
// test2 bridge network does not overlap
config2 := types.NetworkCreate{
Name: "test2",
Driver: "bridge",
IPAM: ipam2,
}
createNetwork(c, config2, true)
c.Assert(isNetworkAvailable(c, "test2"), check.Equals, true)
// remove test0 and retry to create test1
deleteNetwork(c, id0, true)
createNetwork(c, config1, true)
c.Assert(isNetworkAvailable(c, "test1"), check.Equals, true)
// for networks w/o ipam specified, docker will choose proper non-overlapping subnets
createNetwork(c, types.NetworkCreate{Name: "test3"}, true)
c.Assert(isNetworkAvailable(c, "test3"), check.Equals, true)
createNetwork(c, types.NetworkCreate{Name: "test4"}, true)
c.Assert(isNetworkAvailable(c, "test4"), check.Equals, true)
createNetwork(c, types.NetworkCreate{Name: "test5"}, true)
c.Assert(isNetworkAvailable(c, "test5"), check.Equals, true)
for i := 1; i < 6; i++ {
deleteNetwork(c, fmt.Sprintf("test%d", i), true)
}
}
func isNetworkAvailable(c *check.C, name string) bool {
status, body, err := sockRequest("GET", "/networks", nil)
c.Assert(status, check.Equals, http.StatusOK)
c.Assert(err, check.IsNil)
nJSON := []types.NetworkResource{}
err = json.Unmarshal(body, &nJSON)
c.Assert(err, check.IsNil)
for _, n := range nJSON {
if n.Name == name {
return true
}
}
return false
}
func getNetworkIDByName(c *check.C, name string) string {
var (
v = url.Values{}
filterArgs = filters.Args{}
)
filterArgs["name"] = []string{name}
filterJSON, err := filters.ToParam(filterArgs)
c.Assert(err, check.IsNil)
v.Set("filters", filterJSON)
status, body, err := sockRequest("GET", "/networks?"+v.Encode(), nil)
c.Assert(status, check.Equals, http.StatusOK)
c.Assert(err, check.IsNil)
nJSON := []types.NetworkResource{}
err = json.Unmarshal(body, &nJSON)
c.Assert(err, check.IsNil)
c.Assert(len(nJSON), check.Equals, 1)
return nJSON[0].ID
}
func getNetworkResource(c *check.C, id string) *types.NetworkResource {
_, obj, err := sockRequest("GET", "/networks/"+id, nil)
c.Assert(err, check.IsNil)
nr := types.NetworkResource{}
err = json.Unmarshal(obj, &nr)
c.Assert(err, check.IsNil)
return &nr
}
func createNetwork(c *check.C, config types.NetworkCreate, shouldSucceed bool) string {
status, resp, err := sockRequest("POST", "/networks/create", config)
if !shouldSucceed {
c.Assert(status, check.Not(check.Equals), http.StatusCreated)
return ""
}
c.Assert(status, check.Equals, http.StatusCreated)
c.Assert(err, check.IsNil)
var nr types.NetworkCreateResponse
err = json.Unmarshal(resp, &nr)
c.Assert(err, check.IsNil)
return nr.ID
}
func connectNetwork(c *check.C, nid, cid string) {
config := types.NetworkConnect{
Container: cid,
}
status, _, err := sockRequest("POST", "/networks/"+nid+"/connect", config)
c.Assert(status, check.Equals, http.StatusOK)
c.Assert(err, check.IsNil)
}
func disconnectNetwork(c *check.C, nid, cid string) {
config := types.NetworkConnect{
Container: cid,
}
status, _, err := sockRequest("POST", "/networks/"+nid+"/disconnect", config)
c.Assert(status, check.Equals, http.StatusOK)
c.Assert(err, check.IsNil)
}
func deleteNetwork(c *check.C, id string, shouldSucceed bool) {
status, _, err := sockRequest("DELETE", "/networks/"+id, nil)
if !shouldSucceed {
c.Assert(status, check.Not(check.Equals), http.StatusOK)
c.Assert(err, check.NotNil)
return
}
c.Assert(status, check.Equals, http.StatusOK)
c.Assert(err, check.IsNil)
}
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