moby/integration-cli/docker_cli_network_test.go

package main

import (
	"encoding/json"
	"net"
	"strings"

	"github.com/docker/docker/api/types"
	"github.com/go-check/check"
)

func assertNwIsAvailable(c *check.C, name string) {
	if !isNwPresent(c, name) {
		c.Fatalf("Network %s not found in network ls o/p", name)
	}
}

func assertNwNotAvailable(c *check.C, name string) {
	if isNwPresent(c, name) {
		c.Fatalf("Found network %s in network ls o/p", name)
	}
}

func isNwPresent(c *check.C, name string) bool {
	out, _ := dockerCmd(c, "network", "ls")
	lines := strings.Split(out, "\n")
	for i := 1; i < len(lines)-1; i++ {
		if strings.Contains(lines[i], name) {
			return true
		}
	}
	return false
}

func getNwResource(c *check.C, name string) *types.NetworkResource {
	out, _ := dockerCmd(c, "network", "inspect", name)
	nr := types.NetworkResource{}
	err := json.Unmarshal([]byte(out), &nr)
	c.Assert(err, check.IsNil)
	return &nr
}

func (s *DockerSuite) TestDockerNetworkLsDefault(c *check.C) {
	defaults := []string{"bridge", "host", "none"}
	for _, nn := range defaults {
		assertNwIsAvailable(c, nn)
	}
}

func (s *DockerSuite) TestDockerNetworkCreateDelete(c *check.C) {
	dockerCmd(c, "network", "create", "test")
	assertNwIsAvailable(c, "test")

	dockerCmd(c, "network", "rm", "test")
	assertNwNotAvailable(c, "test")
}

func (s *DockerSuite) TestDockerNetworkConnectDisconnect(c *check.C) {
	dockerCmd(c, "network", "create", "test")
	assertNwIsAvailable(c, "test")
	nr := getNwResource(c, "test")

	c.Assert(nr.Name, check.Equals, "test")
	c.Assert(len(nr.Containers), check.Equals, 0)

	// run a container
	out, _ := dockerCmd(c, "run", "-d", "--name", "test", "busybox", "top")
	c.Assert(waitRun("test"), check.IsNil)
	containerID := strings.TrimSpace(out)

	// connect the container to the test network
	dockerCmd(c, "network", "connect", "test", 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
	dockerCmd(c, "network", "disconnect", "test", containerID)
	nr = getNwResource(c, "test")
	c.Assert(nr.Name, check.Equals, "test")
	c.Assert(len(nr.Containers), check.Equals, 0)

	// check if network connect fails for inactive containers
	dockerCmd(c, "stop", containerID)
	_, _, err = dockerCmdWithError("network", "connect", "test", containerID)
	c.Assert(err, check.NotNil)

	dockerCmd(c, "network", "rm", "test")
	assertNwNotAvailable(c, "test")
}