moby/integration-cli/docker_cli_swarm_test.go

// +build !windows

package main

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/http"
	"net/http/httptest"
	"os"
	"strings"
	"time"

	"github.com/docker/docker/api/types/swarm"
	"github.com/docker/docker/pkg/integration/checker"
	"github.com/docker/libnetwork/driverapi"
	"github.com/docker/libnetwork/ipamapi"
	remoteipam "github.com/docker/libnetwork/ipams/remote/api"
	"github.com/go-check/check"
	"github.com/vishvananda/netlink"
)

func (s *DockerSwarmSuite) TestSwarmUpdate(c *check.C) {
	d := s.AddDaemon(c, true, true)

	getSpec := func() swarm.Spec {
		sw := d.getSwarm(c)
		return sw.Spec
	}

	out, err := d.Cmd("swarm", "update", "--cert-expiry", "30h", "--dispatcher-heartbeat", "11s")
	c.Assert(err, checker.IsNil, check.Commentf("out: %v", out))

	spec := getSpec()
	c.Assert(spec.CAConfig.NodeCertExpiry, checker.Equals, 30*time.Hour)
	c.Assert(spec.Dispatcher.HeartbeatPeriod, checker.Equals, 11*time.Second)

	// setting anything under 30m for cert-expiry is not allowed
	out, err = d.Cmd("swarm", "update", "--cert-expiry", "15m")
	c.Assert(err, checker.NotNil)
	c.Assert(out, checker.Contains, "minimum certificate expiry time")
	spec = getSpec()
	c.Assert(spec.CAConfig.NodeCertExpiry, checker.Equals, 30*time.Hour)
}

func (s *DockerSwarmSuite) TestSwarmInit(c *check.C) {
	d := s.AddDaemon(c, false, false)

	getSpec := func() swarm.Spec {
		sw := d.getSwarm(c)
		return sw.Spec
	}

	out, err := d.Cmd("swarm", "init", "--cert-expiry", "30h", "--dispatcher-heartbeat", "11s")
	c.Assert(err, checker.IsNil, check.Commentf("out: %v", out))

	spec := getSpec()
	c.Assert(spec.CAConfig.NodeCertExpiry, checker.Equals, 30*time.Hour)
	c.Assert(spec.Dispatcher.HeartbeatPeriod, checker.Equals, 11*time.Second)

	c.Assert(d.Leave(true), checker.IsNil)
	time.Sleep(500 * time.Millisecond) // https://github.com/docker/swarmkit/issues/1421
	out, err = d.Cmd("swarm", "init")
	c.Assert(err, checker.IsNil, check.Commentf("out: %v", out))

	spec = getSpec()
	c.Assert(spec.CAConfig.NodeCertExpiry, checker.Equals, 90*24*time.Hour)
	c.Assert(spec.Dispatcher.HeartbeatPeriod, checker.Equals, 5*time.Second)
}

func (s *DockerSwarmSuite) TestSwarmInitIPv6(c *check.C) {
	testRequires(c, IPv6)
	d1 := s.AddDaemon(c, false, false)
	out, err := d1.Cmd("swarm", "init", "--listen-addr", "::1")
	c.Assert(err, checker.IsNil, check.Commentf("out: %v", out))

	d2 := s.AddDaemon(c, false, false)
	out, err = d2.Cmd("swarm", "join", "::1")
	c.Assert(err, checker.IsNil, check.Commentf("out: %v", out))

	out, err = d2.Cmd("info")
	c.Assert(err, checker.IsNil, check.Commentf("out: %v", out))
	c.Assert(out, checker.Contains, "Swarm: active")
}

func (s *DockerSwarmSuite) TestSwarmIncompatibleDaemon(c *check.C) {
	// init swarm mode and stop a daemon
	d := s.AddDaemon(c, true, true)
	info, err := d.info()
	c.Assert(err, checker.IsNil)
	c.Assert(info.LocalNodeState, checker.Equals, swarm.LocalNodeStateActive)
	c.Assert(d.Stop(), checker.IsNil)

	// start a daemon with --cluster-store and --cluster-advertise
	err = d.Start("--cluster-store=consul://consuladdr:consulport/some/path", "--cluster-advertise=1.1.1.1:2375")
	c.Assert(err, checker.NotNil)
	content, _ := ioutil.ReadFile(d.logFile.Name())
	c.Assert(string(content), checker.Contains, "--cluster-store and --cluster-advertise daemon configurations are incompatible with swarm mode")

	// start a daemon with --live-restore
	err = d.Start("--live-restore")
	c.Assert(err, checker.NotNil)
	content, _ = ioutil.ReadFile(d.logFile.Name())
	c.Assert(string(content), checker.Contains, "--live-restore daemon configuration is incompatible with swarm mode")
	// restart for teardown
	c.Assert(d.Start(), checker.IsNil)
}

// Test case for #24090
func (s *DockerSwarmSuite) TestSwarmNodeListHostname(c *check.C) {
	d := s.AddDaemon(c, true, true)

	// The first line should contain "HOSTNAME"
	out, err := d.Cmd("node", "ls")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.Split(out, "\n")[0], checker.Contains, "HOSTNAME")
}

// Test case for #24270
func (s *DockerSwarmSuite) TestSwarmServiceListFilter(c *check.C) {
	d := s.AddDaemon(c, true, true)

	name1 := "redis-cluster-md5"
	name2 := "redis-cluster"
	name3 := "other-cluster"
	out, err := d.Cmd("service", "create", "--name", name1, "busybox", "top")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")

	out, err = d.Cmd("service", "create", "--name", name2, "busybox", "top")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")

	out, err = d.Cmd("service", "create", "--name", name3, "busybox", "top")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")

	filter1 := "name=redis-cluster-md5"
	filter2 := "name=redis-cluster"

	// We search checker.Contains with `name+" "` to prevent prefix only.
	out, err = d.Cmd("service", "ls", "--filter", filter1)
	c.Assert(err, checker.IsNil)
	c.Assert(out, checker.Contains, name1+" ")
	c.Assert(out, checker.Not(checker.Contains), name2+" ")
	c.Assert(out, checker.Not(checker.Contains), name3+" ")

	out, err = d.Cmd("service", "ls", "--filter", filter2)
	c.Assert(err, checker.IsNil)
	c.Assert(out, checker.Contains, name1+" ")
	c.Assert(out, checker.Contains, name2+" ")
	c.Assert(out, checker.Not(checker.Contains), name3+" ")

	out, err = d.Cmd("service", "ls")
	c.Assert(err, checker.IsNil)
	c.Assert(out, checker.Contains, name1+" ")
	c.Assert(out, checker.Contains, name2+" ")
	c.Assert(out, checker.Contains, name3+" ")
}

func (s *DockerSwarmSuite) TestSwarmNodeListFilter(c *check.C) {
	d := s.AddDaemon(c, true, true)

	out, err := d.Cmd("node", "inspect", "--format", "{{ .Description.Hostname }}", "self")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")
	name := strings.TrimSpace(out)

	filter := "name=" + name[:4]

	out, err = d.Cmd("node", "ls", "--filter", filter)
	c.Assert(err, checker.IsNil)
	c.Assert(out, checker.Contains, name)

	out, err = d.Cmd("node", "ls", "--filter", "name=none")
	c.Assert(err, checker.IsNil)
	c.Assert(out, checker.Not(checker.Contains), name)
}

func (s *DockerSwarmSuite) TestSwarmNodeTaskListFilter(c *check.C) {
	d := s.AddDaemon(c, true, true)

	name := "redis-cluster-md5"
	out, err := d.Cmd("service", "create", "--name", name, "--replicas=3", "busybox", "top")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")

	// make sure task has been deployed.
	waitAndAssert(c, defaultReconciliationTimeout, d.checkActiveContainerCount, checker.Equals, 3)

	filter := "name=redis-cluster"

	out, err = d.Cmd("node", "ps", "--filter", filter, "self")
	c.Assert(err, checker.IsNil)
	c.Assert(out, checker.Contains, name+".1")
	c.Assert(out, checker.Contains, name+".2")
	c.Assert(out, checker.Contains, name+".3")

	out, err = d.Cmd("node", "ps", "--filter", "name=none", "self")
	c.Assert(err, checker.IsNil)
	c.Assert(out, checker.Not(checker.Contains), name+".1")
	c.Assert(out, checker.Not(checker.Contains), name+".2")
	c.Assert(out, checker.Not(checker.Contains), name+".3")
}

// Test case for #25375
func (s *DockerSwarmSuite) TestSwarmPublishAdd(c *check.C) {
	d := s.AddDaemon(c, true, true)

	name := "top"
	out, err := d.Cmd("service", "create", "--name", name, "--label", "x=y", "busybox", "top")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")

	out, err = d.Cmd("service", "update", "--publish-add", "80:80", name)
	c.Assert(err, checker.IsNil)

	out, err = d.cmdRetryOutOfSequence("service", "update", "--publish-add", "80:80", name)
	c.Assert(err, checker.IsNil)

	out, err = d.cmdRetryOutOfSequence("service", "update", "--publish-add", "80:80", "--publish-add", "80:20", name)
	c.Assert(err, checker.NotNil)

	out, err = d.cmdRetryOutOfSequence("service", "update", "--publish-add", "80:20", name)
	c.Assert(err, checker.IsNil)

	out, err = d.Cmd("service", "inspect", "--format", "{{ .Spec.EndpointSpec.Ports }}", name)
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Equals, "[{ tcp 20 80}]")
}

func (s *DockerSwarmSuite) TestSwarmServiceWithGroup(c *check.C) {
	d := s.AddDaemon(c, true, true)

	name := "top"
	out, err := d.Cmd("service", "create", "--name", name, "--user", "root:root", "--group-add", "wheel", "--group-add", "audio", "--group-add", "staff", "--group-add", "777", "busybox", "top")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")

	// make sure task has been deployed.
	waitAndAssert(c, defaultReconciliationTimeout, d.checkActiveContainerCount, checker.Equals, 1)

	out, err = d.Cmd("ps", "-q")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")

	container := strings.TrimSpace(out)

	out, err = d.Cmd("exec", container, "id")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Equals, "uid=0(root) gid=0(root) groups=10(wheel),29(audio),50(staff),777")
}

func (s *DockerSwarmSuite) TestSwarmContainerAutoStart(c *check.C) {
	d := s.AddDaemon(c, true, true)

	out, err := d.Cmd("network", "create", "--attachable", "-d", "overlay", "foo")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")

	out, err = d.Cmd("run", "-id", "--restart=always", "--net=foo", "--name=test", "busybox", "top")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")

	out, err = d.Cmd("ps", "-q")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")

	d.Restart()

	out, err = d.Cmd("ps", "-q")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")
}

func (s *DockerSwarmSuite) TestSwarmRemoveInternalNetwork(c *check.C) {
	d := s.AddDaemon(c, true, true)

	name := "ingress"
	out, err := d.Cmd("network", "rm", name)
	c.Assert(err, checker.NotNil)
	c.Assert(strings.TrimSpace(out), checker.Contains, name)
	c.Assert(strings.TrimSpace(out), checker.Contains, "is a pre-defined network and cannot be removed")
}

// Test case for #24108, also the case from:
// https://github.com/docker/docker/pull/24620#issuecomment-233715656
func (s *DockerSwarmSuite) TestSwarmTaskListFilter(c *check.C) {
	d := s.AddDaemon(c, true, true)

	name := "redis-cluster-md5"
	out, err := d.Cmd("service", "create", "--name", name, "--replicas=3", "busybox", "top")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")

	filter := "name=redis-cluster"

	checkNumTasks := func(*check.C) (interface{}, check.CommentInterface) {
		out, err := d.Cmd("service", "ps", "--filter", filter, name)
		c.Assert(err, checker.IsNil)
		return len(strings.Split(out, "\n")) - 2, nil // includes header and nl in last line
	}

	// wait until all tasks have been created
	waitAndAssert(c, defaultReconciliationTimeout, checkNumTasks, checker.Equals, 3)

	out, err = d.Cmd("service", "ps", "--filter", filter, name)
	c.Assert(err, checker.IsNil)
	c.Assert(out, checker.Contains, name+".1")
	c.Assert(out, checker.Contains, name+".2")
	c.Assert(out, checker.Contains, name+".3")

	out, err = d.Cmd("service", "ps", "--filter", "name="+name+".1", name)
	c.Assert(err, checker.IsNil)
	c.Assert(out, checker.Contains, name+".1")
	c.Assert(out, checker.Not(checker.Contains), name+".2")
	c.Assert(out, checker.Not(checker.Contains), name+".3")

	out, err = d.Cmd("service", "ps", "--filter", "name=none", name)
	c.Assert(err, checker.IsNil)
	c.Assert(out, checker.Not(checker.Contains), name+".1")
	c.Assert(out, checker.Not(checker.Contains), name+".2")
	c.Assert(out, checker.Not(checker.Contains), name+".3")

	name = "redis-cluster-sha1"
	out, err = d.Cmd("service", "create", "--name", name, "--mode=global", "busybox", "top")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")

	waitAndAssert(c, defaultReconciliationTimeout, checkNumTasks, checker.Equals, 1)

	filter = "name=redis-cluster"
	out, err = d.Cmd("service", "ps", "--filter", filter, name)
	c.Assert(err, checker.IsNil)
	c.Assert(out, checker.Contains, name)

	out, err = d.Cmd("service", "ps", "--filter", "name="+name, name)
	c.Assert(err, checker.IsNil)
	c.Assert(out, checker.Contains, name)

	out, err = d.Cmd("service", "ps", "--filter", "name=none", name)
	c.Assert(err, checker.IsNil)
	c.Assert(out, checker.Not(checker.Contains), name)
}

func (s *DockerSwarmSuite) TestPsListContainersFilterIsTask(c *check.C) {
	d := s.AddDaemon(c, true, true)

	// Create a bare container
	out, err := d.Cmd("run", "-d", "--name=bare-container", "busybox", "top")
	c.Assert(err, checker.IsNil)
	bareID := strings.TrimSpace(out)[:12]
	// Create a service
	name := "busybox-top"
	out, err = d.Cmd("service", "create", "--name", name, "busybox", "top")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")

	// make sure task has been deployed.
	waitAndAssert(c, defaultReconciliationTimeout, d.checkServiceRunningTasks(name), checker.Equals, 1)

	// Filter non-tasks
	out, err = d.Cmd("ps", "-a", "-q", "--filter=is-task=false")
	c.Assert(err, checker.IsNil)
	psOut := strings.TrimSpace(out)
	c.Assert(psOut, checker.Equals, bareID, check.Commentf("Expected id %s, got %s for is-task label, output %q", bareID, psOut, out))

	// Filter tasks
	out, err = d.Cmd("ps", "-a", "-q", "--filter=is-task=true")
	c.Assert(err, checker.IsNil)
	lines := strings.Split(strings.Trim(out, "\n "), "\n")
	c.Assert(lines, checker.HasLen, 1)
	c.Assert(lines[0], checker.Not(checker.Equals), bareID, check.Commentf("Expected not %s, but got it for is-task label, output %q", bareID, out))
}

const globalNetworkPlugin = "global-network-plugin"
const globalIPAMPlugin = "global-ipam-plugin"

func (s *DockerSwarmSuite) SetUpSuite(c *check.C) {
	mux := http.NewServeMux()
	s.server = httptest.NewServer(mux)
	c.Assert(s.server, check.NotNil, check.Commentf("Failed to start an HTTP Server"))
	setupRemoteGlobalNetworkPlugin(c, mux, s.server.URL, globalNetworkPlugin, globalIPAMPlugin)
}

func setupRemoteGlobalNetworkPlugin(c *check.C, mux *http.ServeMux, url, netDrv, ipamDrv string) {

	mux.HandleFunc("/Plugin.Activate", func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
		fmt.Fprintf(w, `{"Implements": ["%s", "%s"]}`, driverapi.NetworkPluginEndpointType, ipamapi.PluginEndpointType)
	})

	// Network driver implementation
	mux.HandleFunc(fmt.Sprintf("/%s.GetCapabilities", driverapi.NetworkPluginEndpointType), func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
		fmt.Fprintf(w, `{"Scope":"global"}`)
	})

	mux.HandleFunc(fmt.Sprintf("/%s.AllocateNetwork", driverapi.NetworkPluginEndpointType), func(w http.ResponseWriter, r *http.Request) {
		err := json.NewDecoder(r.Body).Decode(&remoteDriverNetworkRequest)
		if err != nil {
			http.Error(w, "Unable to decode JSON payload: "+err.Error(), http.StatusBadRequest)
			return
		}
		w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
		fmt.Fprintf(w, "null")
	})

	mux.HandleFunc(fmt.Sprintf("/%s.FreeNetwork", driverapi.NetworkPluginEndpointType), func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
		fmt.Fprintf(w, "null")
	})

	mux.HandleFunc(fmt.Sprintf("/%s.CreateNetwork", driverapi.NetworkPluginEndpointType), func(w http.ResponseWriter, r *http.Request) {
		err := json.NewDecoder(r.Body).Decode(&remoteDriverNetworkRequest)
		if err != nil {
			http.Error(w, "Unable to decode JSON payload: "+err.Error(), http.StatusBadRequest)
			return
		}
		w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
		fmt.Fprintf(w, "null")
	})

	mux.HandleFunc(fmt.Sprintf("/%s.DeleteNetwork", driverapi.NetworkPluginEndpointType), func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
		fmt.Fprintf(w, "null")
	})

	mux.HandleFunc(fmt.Sprintf("/%s.CreateEndpoint", driverapi.NetworkPluginEndpointType), func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
		fmt.Fprintf(w, `{"Interface":{"MacAddress":"a0:b1:c2:d3:e4:f5"}}`)
	})

	mux.HandleFunc(fmt.Sprintf("/%s.Join", driverapi.NetworkPluginEndpointType), func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")

		veth := &netlink.Veth{
			LinkAttrs: netlink.LinkAttrs{Name: "randomIfName", TxQLen: 0}, PeerName: "cnt0"}
		if err := netlink.LinkAdd(veth); err != nil {
			fmt.Fprintf(w, `{"Error":"failed to add veth pair: `+err.Error()+`"}`)
		} else {
			fmt.Fprintf(w, `{"InterfaceName":{ "SrcName":"cnt0", "DstPrefix":"veth"}}`)
		}
	})

	mux.HandleFunc(fmt.Sprintf("/%s.Leave", driverapi.NetworkPluginEndpointType), func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
		fmt.Fprintf(w, "null")
	})

	mux.HandleFunc(fmt.Sprintf("/%s.DeleteEndpoint", driverapi.NetworkPluginEndpointType), func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
		if link, err := netlink.LinkByName("cnt0"); err == nil {
			netlink.LinkDel(link)
		}
		fmt.Fprintf(w, "null")
	})

	// IPAM Driver implementation
	var (
		poolRequest       remoteipam.RequestPoolRequest
		poolReleaseReq    remoteipam.ReleasePoolRequest
		addressRequest    remoteipam.RequestAddressRequest
		addressReleaseReq remoteipam.ReleaseAddressRequest
		lAS               = "localAS"
		gAS               = "globalAS"
		pool              = "172.28.0.0/16"
		poolID            = lAS + "/" + pool
		gw                = "172.28.255.254/16"
	)

	mux.HandleFunc(fmt.Sprintf("/%s.GetDefaultAddressSpaces", ipamapi.PluginEndpointType), func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
		fmt.Fprintf(w, `{"LocalDefaultAddressSpace":"`+lAS+`", "GlobalDefaultAddressSpace": "`+gAS+`"}`)
	})

	mux.HandleFunc(fmt.Sprintf("/%s.RequestPool", ipamapi.PluginEndpointType), func(w http.ResponseWriter, r *http.Request) {
		err := json.NewDecoder(r.Body).Decode(&poolRequest)
		if err != nil {
			http.Error(w, "Unable to decode JSON payload: "+err.Error(), http.StatusBadRequest)
			return
		}
		w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
		if poolRequest.AddressSpace != lAS && poolRequest.AddressSpace != gAS {
			fmt.Fprintf(w, `{"Error":"Unknown address space in pool request: `+poolRequest.AddressSpace+`"}`)
		} else if poolRequest.Pool != "" && poolRequest.Pool != pool {
			fmt.Fprintf(w, `{"Error":"Cannot handle explicit pool requests yet"}`)
		} else {
			fmt.Fprintf(w, `{"PoolID":"`+poolID+`", "Pool":"`+pool+`"}`)
		}
	})

	mux.HandleFunc(fmt.Sprintf("/%s.RequestAddress", ipamapi.PluginEndpointType), func(w http.ResponseWriter, r *http.Request) {
		err := json.NewDecoder(r.Body).Decode(&addressRequest)
		if err != nil {
			http.Error(w, "Unable to decode JSON payload: "+err.Error(), http.StatusBadRequest)
			return
		}
		w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
		// make sure libnetwork is now querying on the expected pool id
		if addressRequest.PoolID != poolID {
			fmt.Fprintf(w, `{"Error":"unknown pool id"}`)
		} else if addressRequest.Address != "" {
			fmt.Fprintf(w, `{"Error":"Cannot handle explicit address requests yet"}`)
		} else {
			fmt.Fprintf(w, `{"Address":"`+gw+`"}`)
		}
	})

	mux.HandleFunc(fmt.Sprintf("/%s.ReleaseAddress", ipamapi.PluginEndpointType), func(w http.ResponseWriter, r *http.Request) {
		err := json.NewDecoder(r.Body).Decode(&addressReleaseReq)
		if err != nil {
			http.Error(w, "Unable to decode JSON payload: "+err.Error(), http.StatusBadRequest)
			return
		}
		w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
		// make sure libnetwork is now asking to release the expected address from the expected poolid
		if addressRequest.PoolID != poolID {
			fmt.Fprintf(w, `{"Error":"unknown pool id"}`)
		} else if addressReleaseReq.Address != gw {
			fmt.Fprintf(w, `{"Error":"unknown address"}`)
		} else {
			fmt.Fprintf(w, "null")
		}
	})

	mux.HandleFunc(fmt.Sprintf("/%s.ReleasePool", ipamapi.PluginEndpointType), func(w http.ResponseWriter, r *http.Request) {
		err := json.NewDecoder(r.Body).Decode(&poolReleaseReq)
		if err != nil {
			http.Error(w, "Unable to decode JSON payload: "+err.Error(), http.StatusBadRequest)
			return
		}
		w.Header().Set("Content-Type", "application/vnd.docker.plugins.v1+json")
		// make sure libnetwork is now asking to release the expected poolid
		if addressRequest.PoolID != poolID {
			fmt.Fprintf(w, `{"Error":"unknown pool id"}`)
		} else {
			fmt.Fprintf(w, "null")
		}
	})

	err := os.MkdirAll("/etc/docker/plugins", 0755)
	c.Assert(err, checker.IsNil)

	fileName := fmt.Sprintf("/etc/docker/plugins/%s.spec", netDrv)
	err = ioutil.WriteFile(fileName, []byte(url), 0644)
	c.Assert(err, checker.IsNil)

	ipamFileName := fmt.Sprintf("/etc/docker/plugins/%s.spec", ipamDrv)
	err = ioutil.WriteFile(ipamFileName, []byte(url), 0644)
	c.Assert(err, checker.IsNil)
}

func (s *DockerSwarmSuite) TestSwarmNetworkPlugin(c *check.C) {
	d := s.AddDaemon(c, true, true)

	out, err := d.Cmd("network", "create", "-d", globalNetworkPlugin, "foo")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")

	name := "top"
	out, err = d.Cmd("service", "create", "--name", name, "--network", "foo", "busybox", "top")
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Not(checker.Equals), "")

	out, err = d.Cmd("service", "inspect", "--format", "{{range .Spec.Networks}}{{.Target}}{{end}}", name)
	c.Assert(err, checker.IsNil)
	c.Assert(strings.TrimSpace(out), checker.Equals, "foo")
}