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package network // import "github.com/docker/docker/integration/network"
import (
"bytes"
"context"
"encoding/json"
"fmt"
"net/http"
"os/exec"
"strings"
"testing"
"github.com/docker/docker/api/types"
ntypes "github.com/docker/docker/api/types/network"
"github.com/docker/docker/integration/internal/container"
"github.com/docker/docker/integration/internal/network"
"github.com/docker/docker/testutil/daemon"
"github.com/docker/docker/testutil/request"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
"gotest.tools/v3/icmd"
"gotest.tools/v3/skip"
)
func TestRunContainerWithBridgeNone(t *testing.T) {
skip.If(t, testEnv.IsRemoteDaemon, "cannot start daemon on remote test run")
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsUserNamespace)
skip.If(t, testEnv.IsRootless, "rootless mode has different view of network")
d := daemon.New(t)
d.StartWithBusybox(t, "-b", "none")
defer d.Stop(t)
c := d.NewClientT(t)
ctx := context.Background()
id1 := container.Run(ctx, t, c)
defer c.ContainerRemove(ctx, id1, types.ContainerRemoveOptions{Force: true})
result, err := container.Exec(ctx, c, id1, []string{"ip", "l"})
assert.NilError(t, err)
assert.Check(t, is.Equal(false, strings.Contains(result.Combined(), "eth0")), "There shouldn't be eth0 in container in default(bridge) mode when bridge network is disabled")
id2 := container.Run(ctx, t, c, container.WithNetworkMode("bridge"))
defer c.ContainerRemove(ctx, id2, types.ContainerRemoveOptions{Force: true})
result, err = container.Exec(ctx, c, id2, []string{"ip", "l"})
assert.NilError(t, err)
assert.Check(t, is.Equal(false, strings.Contains(result.Combined(), "eth0")), "There shouldn't be eth0 in container in bridge mode when bridge network is disabled")
nsCommand := "ls -l /proc/self/ns/net | awk -F '->' '{print $2}'"
cmd := exec.Command("sh", "-c", nsCommand)
stdout := bytes.NewBuffer(nil)
cmd.Stdout = stdout
err = cmd.Run()
assert.NilError(t, err, "Failed to get current process network namespace: %+v", err)
id3 := container.Run(ctx, t, c, container.WithNetworkMode("host"))
defer c.ContainerRemove(ctx, id3, types.ContainerRemoveOptions{Force: true})
result, err = container.Exec(ctx, c, id3, []string{"sh", "-c", nsCommand})
assert.NilError(t, err)
assert.Check(t, is.Equal(stdout.String(), result.Combined()), "The network namespace of container should be the same with host when --net=host and bridge network is disabled")
}
// TestNetworkInvalidJSON tests that POST endpoints that expect a body return
// the correct error when sending invalid JSON requests.
func TestNetworkInvalidJSON(t *testing.T) {
defer setupTest(t)()
// POST endpoints that accept / expect a JSON body;
endpoints := []string{
"/networks/create",
"/networks/bridge/connect",
"/networks/bridge/disconnect",
}
for _, ep := range endpoints {
ep := ep
t.Run(ep[1:], func(t *testing.T) {
t.Parallel()
t.Run("invalid content type", func(t *testing.T) {
res, body, err := request.Post(ep, request.RawString("{}"), request.ContentType("text/plain"))
assert.NilError(t, err)
assert.Check(t, is.Equal(res.StatusCode, http.StatusBadRequest))
buf, err := request.ReadBody(body)
assert.NilError(t, err)
assert.Check(t, is.Contains(string(buf), "unsupported Content-Type header (text/plain): must be 'application/json'"))
})
t.Run("invalid JSON", func(t *testing.T) {
res, body, err := request.Post(ep, request.RawString("{invalid json"), request.JSON)
assert.NilError(t, err)
assert.Check(t, is.Equal(res.StatusCode, http.StatusBadRequest))
buf, err := request.ReadBody(body)
assert.NilError(t, err)
assert.Check(t, is.Contains(string(buf), "invalid JSON: invalid character 'i' looking for beginning of object key string"))
})
t.Run("extra content after JSON", func(t *testing.T) {
res, body, err := request.Post(ep, request.RawString(`{} trailing content`), request.JSON)
assert.NilError(t, err)
assert.Check(t, is.Equal(res.StatusCode, http.StatusBadRequest))
buf, err := request.ReadBody(body)
assert.NilError(t, err)
assert.Check(t, is.Contains(string(buf), "unexpected content after JSON"))
})
t.Run("empty body", func(t *testing.T) {
// empty body should not produce an 500 internal server error, or
// any 5XX error (this is assuming the request does not produce
// an internal server error for another reason, but it shouldn't)
res, _, err := request.Post(ep, request.RawString(``), request.JSON)
assert.NilError(t, err)
assert.Check(t, res.StatusCode < http.StatusInternalServerError)
})
})
}
}
// TestNetworkList verifies that /networks returns a list of networks either
// with, or without a trailing slash (/networks/). Regression test for https://github.com/moby/moby/issues/24595
func TestNetworkList(t *testing.T) {
defer setupTest(t)()
endpoints := []string{
"/networks",
"/networks/",
}
for _, ep := range endpoints {
ep := ep
t.Run(ep, func(t *testing.T) {
t.Parallel()
res, body, err := request.Get(ep, request.JSON)
assert.NilError(t, err)
assert.Equal(t, res.StatusCode, http.StatusOK)
buf, err := request.ReadBody(body)
assert.NilError(t, err)
var nws []types.NetworkResource
err = json.Unmarshal(buf, &nws)
assert.NilError(t, err)
assert.Assert(t, len(nws) > 0)
})
}
}
func TestHostIPv4BridgeLabel(t *testing.T) {
skip.If(t, testEnv.OSType == "windows")
skip.If(t, testEnv.IsRemoteDaemon)
skip.If(t, testEnv.IsRootless, "rootless mode has different view of network")
d := daemon.New(t)
d.Start(t)
defer d.Stop(t)
c := d.NewClientT(t)
defer c.Close()
ctx := context.Background()
ipv4SNATAddr := "172.0.0.172"
// Create a bridge network with --opt com.docker.network.host_ipv4=172.0.0.172
bridgeName := "hostIPv4Bridge"
network.CreateNoError(ctx, t, c, bridgeName,
network.WithDriver("bridge"),
network.WithOption("com.docker.network.host_ipv4", ipv4SNATAddr),
network.WithOption("com.docker.network.bridge.name", bridgeName),
)
out, err := c.NetworkInspect(ctx, bridgeName, types.NetworkInspectOptions{Verbose: true})
assert.NilError(t, err)
assert.Assert(t, len(out.IPAM.Config) > 0)
// Make sure the SNAT rule exists
icmd.RunCommand("iptables", "-t", "nat", "-C", "POSTROUTING", "-s", out.IPAM.Config[0].Subnet, "!", "-o", bridgeName, "-j", "SNAT", "--to-source", ipv4SNATAddr).Assert(t, icmd.Success)
}
func TestDefaultNetworkOpts(t *testing.T) {
skip.If(t, testEnv.OSType == "windows")
skip.If(t, testEnv.IsRemoteDaemon)
skip.If(t, testEnv.IsRootless, "rootless mode has different view of network")
tests := []struct {
name string
mtu int
configFrom bool
args []string
}{
{
name: "default value",
mtu: 1500,
args: []string{},
},
{
name: "cmdline value",
mtu: 1234,
args: []string{"--default-network-opt", "bridge=com.docker.network.driver.mtu=1234"},
},
{
name: "config-from value",
configFrom: true,
mtu: 1233,
args: []string{"--default-network-opt", "bridge=com.docker.network.driver.mtu=1234"},
},
}
for _, tc := range tests {
tc := tc
t.Run(tc.name, func(t *testing.T) {
d := daemon.New(t)
d.StartWithBusybox(t, tc.args...)
defer d.Stop(t)
c := d.NewClientT(t)
defer c.Close()
ctx := context.Background()
if tc.configFrom {
// Create a new network config
network.CreateNoError(ctx, t, c, "from-net", func(create *types.NetworkCreate) {
create.ConfigOnly = true
create.Options = map[string]string{
"com.docker.network.driver.mtu": fmt.Sprint(tc.mtu),
}
})
defer c.NetworkRemove(ctx, "from-net")
}
// Create a new network
networkName := "testnet"
network.CreateNoError(ctx, t, c, networkName, func(create *types.NetworkCreate) {
if tc.configFrom {
create.ConfigFrom = &ntypes.ConfigReference{
Network: "from-net",
}
}
})
defer c.NetworkRemove(ctx, networkName)
// Start a container to inspect the MTU of its network interface
id1 := container.Run(ctx, t, c, container.WithNetworkMode(networkName))
defer c.ContainerRemove(ctx, id1, types.ContainerRemoveOptions{Force: true})
result, err := container.Exec(ctx, c, id1, []string{"ip", "l", "show", "eth0"})
assert.NilError(t, err)
assert.Check(t, is.Contains(result.Combined(), fmt.Sprintf(" mtu %d ", tc.mtu)), "Network MTU should have been set to %d", tc.mtu)
})
}
}
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