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docker_cli_daemon_test.go
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docker_cli_daemon_test.go
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// +build daemon,!windows
package main
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"net"
"os"
"os/exec"
"path/filepath"
"regexp"
"strconv"
"strings"
"time"
"github.com/docker/libnetwork/iptables"
"github.com/docker/libtrust"
"github.com/go-check/check"
)
func (s *DockerDaemonSuite) TestDaemonRestartWithRunningContainersPorts(c *check.C) {
if err := s.d.StartWithBusybox(); err != nil {
c.Fatalf("Could not start daemon with busybox: %v", err)
}
if out, err := s.d.Cmd("run", "-d", "--name", "top1", "-p", "1234:80", "--restart", "always", "busybox:latest", "top"); err != nil {
c.Fatalf("Could not run top1: err=%v\n%s", err, out)
}
// --restart=no by default
if out, err := s.d.Cmd("run", "-d", "--name", "top2", "-p", "80", "busybox:latest", "top"); err != nil {
c.Fatalf("Could not run top2: err=%v\n%s", err, out)
}
testRun := func(m map[string]bool, prefix string) {
var format string
for cont, shouldRun := range m {
out, err := s.d.Cmd("ps")
if err != nil {
c.Fatalf("Could not run ps: err=%v\n%q", err, out)
}
if shouldRun {
format = "%scontainer %q is not running"
} else {
format = "%scontainer %q is running"
}
if shouldRun != strings.Contains(out, cont) {
c.Fatalf(format, prefix, cont)
}
}
}
testRun(map[string]bool{"top1": true, "top2": true}, "")
if err := s.d.Restart(); err != nil {
c.Fatalf("Could not restart daemon: %v", err)
}
testRun(map[string]bool{"top1": true, "top2": false}, "After daemon restart: ")
}
func (s *DockerDaemonSuite) TestDaemonRestartWithVolumesRefs(c *check.C) {
if err := s.d.StartWithBusybox(); err != nil {
c.Fatal(err)
}
if out, err := s.d.Cmd("run", "-d", "--name", "volrestarttest1", "-v", "/foo", "busybox"); err != nil {
c.Fatal(err, out)
}
if err := s.d.Restart(); err != nil {
c.Fatal(err)
}
if _, err := s.d.Cmd("run", "-d", "--volumes-from", "volrestarttest1", "--name", "volrestarttest2", "busybox", "top"); err != nil {
c.Fatal(err)
}
if out, err := s.d.Cmd("rm", "-fv", "volrestarttest2"); err != nil {
c.Fatal(err, out)
}
out, err := s.d.Cmd("inspect", "-f", "{{json .Mounts}}", "volrestarttest1")
c.Assert(err, check.IsNil)
if _, err := inspectMountPointJSON(out, "/foo"); err != nil {
c.Fatalf("Expected volume to exist: /foo, error: %v\n", err)
}
}
// #11008
func (s *DockerDaemonSuite) TestDaemonRestartUnlessStopped(c *check.C) {
err := s.d.StartWithBusybox()
c.Assert(err, check.IsNil)
out, err := s.d.Cmd("run", "-d", "--name", "top1", "--restart", "always", "busybox:latest", "top")
c.Assert(err, check.IsNil, check.Commentf("run top1: %v", out))
out, err = s.d.Cmd("run", "-d", "--name", "top2", "--restart", "unless-stopped", "busybox:latest", "top")
c.Assert(err, check.IsNil, check.Commentf("run top2: %v", out))
testRun := func(m map[string]bool, prefix string) {
var format string
for name, shouldRun := range m {
out, err := s.d.Cmd("ps")
c.Assert(err, check.IsNil, check.Commentf("run ps: %v", out))
if shouldRun {
format = "%scontainer %q is not running"
} else {
format = "%scontainer %q is running"
}
c.Assert(strings.Contains(out, name), check.Equals, shouldRun, check.Commentf(format, prefix, name))
}
}
// both running
testRun(map[string]bool{"top1": true, "top2": true}, "")
out, err = s.d.Cmd("stop", "top1")
c.Assert(err, check.IsNil, check.Commentf(out))
out, err = s.d.Cmd("stop", "top2")
c.Assert(err, check.IsNil, check.Commentf(out))
// both stopped
testRun(map[string]bool{"top1": false, "top2": false}, "")
err = s.d.Restart()
c.Assert(err, check.IsNil)
// restart=always running
testRun(map[string]bool{"top1": true, "top2": false}, "After daemon restart: ")
out, err = s.d.Cmd("start", "top2")
c.Assert(err, check.IsNil, check.Commentf("start top2: %v", out))
err = s.d.Restart()
c.Assert(err, check.IsNil)
// both running
testRun(map[string]bool{"top1": true, "top2": true}, "After second daemon restart: ")
}
func (s *DockerDaemonSuite) TestDaemonStartIptablesFalse(c *check.C) {
if err := s.d.Start("--iptables=false"); err != nil {
c.Fatalf("we should have been able to start the daemon with passing iptables=false: %v", err)
}
}
// Issue #8444: If docker0 bridge is modified (intentionally or unintentionally) and
// no longer has an IP associated, we should gracefully handle that case and associate
// an IP with it rather than fail daemon start
func (s *DockerDaemonSuite) TestDaemonStartBridgeWithoutIPAssociation(c *check.C) {
// rather than depending on brctl commands to verify docker0 is created and up
// let's start the daemon and stop it, and then make a modification to run the
// actual test
if err := s.d.Start(); err != nil {
c.Fatalf("Could not start daemon: %v", err)
}
if err := s.d.Stop(); err != nil {
c.Fatalf("Could not stop daemon: %v", err)
}
// now we will remove the ip from docker0 and then try starting the daemon
ipCmd := exec.Command("ip", "addr", "flush", "dev", "docker0")
stdout, stderr, _, err := runCommandWithStdoutStderr(ipCmd)
if err != nil {
c.Fatalf("failed to remove docker0 IP association: %v, stdout: %q, stderr: %q", err, stdout, stderr)
}
if err := s.d.Start(); err != nil {
warning := "**WARNING: Docker bridge network in bad state--delete docker0 bridge interface to fix"
c.Fatalf("Could not start daemon when docker0 has no IP address: %v\n%s", err, warning)
}
}
func (s *DockerDaemonSuite) TestDaemonIptablesClean(c *check.C) {
if err := s.d.StartWithBusybox(); err != nil {
c.Fatalf("Could not start daemon with busybox: %v", err)
}
if out, err := s.d.Cmd("run", "-d", "--name", "top", "-p", "80", "busybox:latest", "top"); err != nil {
c.Fatalf("Could not run top: %s, %v", out, err)
}
// get output from iptables with container running
ipTablesSearchString := "tcp dpt:80"
ipTablesCmd := exec.Command("iptables", "-nvL")
out, _, err := runCommandWithOutput(ipTablesCmd)
if err != nil {
c.Fatalf("Could not run iptables -nvL: %s, %v", out, err)
}
if !strings.Contains(out, ipTablesSearchString) {
c.Fatalf("iptables output should have contained %q, but was %q", ipTablesSearchString, out)
}
if err := s.d.Stop(); err != nil {
c.Fatalf("Could not stop daemon: %v", err)
}
// get output from iptables after restart
ipTablesCmd = exec.Command("iptables", "-nvL")
out, _, err = runCommandWithOutput(ipTablesCmd)
if err != nil {
c.Fatalf("Could not run iptables -nvL: %s, %v", out, err)
}
if strings.Contains(out, ipTablesSearchString) {
c.Fatalf("iptables output should not have contained %q, but was %q", ipTablesSearchString, out)
}
}
func (s *DockerDaemonSuite) TestDaemonIptablesCreate(c *check.C) {
if err := s.d.StartWithBusybox(); err != nil {
c.Fatalf("Could not start daemon with busybox: %v", err)
}
if out, err := s.d.Cmd("run", "-d", "--name", "top", "--restart=always", "-p", "80", "busybox:latest", "top"); err != nil {
c.Fatalf("Could not run top: %s, %v", out, err)
}
// get output from iptables with container running
ipTablesSearchString := "tcp dpt:80"
ipTablesCmd := exec.Command("iptables", "-nvL")
out, _, err := runCommandWithOutput(ipTablesCmd)
if err != nil {
c.Fatalf("Could not run iptables -nvL: %s, %v", out, err)
}
if !strings.Contains(out, ipTablesSearchString) {
c.Fatalf("iptables output should have contained %q, but was %q", ipTablesSearchString, out)
}
if err := s.d.Restart(); err != nil {
c.Fatalf("Could not restart daemon: %v", err)
}
// make sure the container is not running
runningOut, err := s.d.Cmd("inspect", "--format='{{.State.Running}}'", "top")
if err != nil {
c.Fatalf("Could not inspect on container: %s, %v", out, err)
}
if strings.TrimSpace(runningOut) != "true" {
c.Fatalf("Container should have been restarted after daemon restart. Status running should have been true but was: %q", strings.TrimSpace(runningOut))
}
// get output from iptables after restart
ipTablesCmd = exec.Command("iptables", "-nvL")
out, _, err = runCommandWithOutput(ipTablesCmd)
if err != nil {
c.Fatalf("Could not run iptables -nvL: %s, %v", out, err)
}
if !strings.Contains(out, ipTablesSearchString) {
c.Fatalf("iptables output after restart should have contained %q, but was %q", ipTablesSearchString, out)
}
}
// TestDaemonIPv6Enabled checks that when the daemon is started with --ipv6=true that the docker0 bridge
// has the fe80::1 address and that a container is assigned a link-local address
func (s *DockerSuite) TestDaemonIPv6Enabled(c *check.C) {
testRequires(c, IPv6)
if err := setupV6(); err != nil {
c.Fatal("Could not set up host for IPv6 tests")
}
d := NewDaemon(c)
if err := d.StartWithBusybox("--ipv6"); err != nil {
c.Fatal(err)
}
defer d.Stop()
iface, err := net.InterfaceByName("docker0")
if err != nil {
c.Fatalf("Error getting docker0 interface: %v", err)
}
addrs, err := iface.Addrs()
if err != nil {
c.Fatalf("Error getting addresses for docker0 interface: %v", err)
}
var found bool
expected := "fe80::1/64"
for i := range addrs {
if addrs[i].String() == expected {
found = true
}
}
if !found {
c.Fatalf("Bridge does not have an IPv6 Address")
}
if out, err := d.Cmd("run", "-itd", "--name=ipv6test", "busybox:latest"); err != nil {
c.Fatalf("Could not run container: %s, %v", out, err)
}
out, err := d.Cmd("inspect", "--format", "'{{.NetworkSettings.LinkLocalIPv6Address}}'", "ipv6test")
out = strings.Trim(out, " \r\n'")
if err != nil {
c.Fatalf("Error inspecting container: %s, %v", out, err)
}
if ip := net.ParseIP(out); ip == nil {
c.Fatalf("Container should have a link-local IPv6 address")
}
out, err = d.Cmd("inspect", "--format", "'{{.NetworkSettings.GlobalIPv6Address}}'", "ipv6test")
out = strings.Trim(out, " \r\n'")
if err != nil {
c.Fatalf("Error inspecting container: %s, %v", out, err)
}
if ip := net.ParseIP(out); ip != nil {
c.Fatalf("Container should not have a global IPv6 address: %v", out)
}
if err := teardownV6(); err != nil {
c.Fatal("Could not perform teardown for IPv6 tests")
}
}
// TestDaemonIPv6FixedCIDR checks that when the daemon is started with --ipv6=true and a fixed CIDR
// that running containers are given a link-local and global IPv6 address
func (s *DockerSuite) TestDaemonIPv6FixedCIDR(c *check.C) {
testRequires(c, IPv6)
if err := setupV6(); err != nil {
c.Fatal("Could not set up host for IPv6 tests")
}
d := NewDaemon(c)
if err := d.StartWithBusybox("--ipv6", "--fixed-cidr-v6='2001:db8:1::/64'"); err != nil {
c.Fatalf("Could not start daemon with busybox: %v", err)
}
defer d.Stop()
if out, err := d.Cmd("run", "-itd", "--name=ipv6test", "busybox:latest"); err != nil {
c.Fatalf("Could not run container: %s, %v", out, err)
}
out, err := d.Cmd("inspect", "--format", "'{{.NetworkSettings.LinkLocalIPv6Address}}'", "ipv6test")
out = strings.Trim(out, " \r\n'")
if err != nil {
c.Fatalf("Error inspecting container: %s, %v", out, err)
}
if ip := net.ParseIP(out); ip == nil {
c.Fatalf("Container should have a link-local IPv6 address")
}
out, err = d.Cmd("inspect", "--format", "'{{.NetworkSettings.GlobalIPv6Address}}'", "ipv6test")
out = strings.Trim(out, " \r\n'")
if err != nil {
c.Fatalf("Error inspecting container: %s, %v", out, err)
}
if ip := net.ParseIP(out); ip == nil {
c.Fatalf("Container should have a global IPv6 address")
}
if err := teardownV6(); err != nil {
c.Fatal("Could not perform teardown for IPv6 tests")
}
}
func (s *DockerDaemonSuite) TestDaemonLogLevelWrong(c *check.C) {
c.Assert(s.d.Start("--log-level=bogus"), check.NotNil, check.Commentf("Daemon shouldn't start with wrong log level"))
}
func (s *DockerSuite) TestDaemonStartWithBackwardCompatibility(c *check.C) {
var validCommandArgs = [][]string{
{"--selinux-enabled", "-l", "info"},
{"--insecure-registry", "daemon"},
}
var invalidCommandArgs = [][]string{
{"--selinux-enabled", "--storage-opt"},
{"-D", "-b"},
{"--config", "/tmp"},
}
for _, args := range validCommandArgs {
d := NewDaemon(c)
d.Command = "--daemon"
if err := d.Start(args...); err != nil {
c.Fatalf("Daemon should have started successfully with --daemon %v: %v", args, err)
}
d.Stop()
}
for _, args := range invalidCommandArgs {
d := NewDaemon(c)
if err := d.Start(args...); err == nil {
d.Stop()
c.Fatalf("Daemon should have failed to start with %v", args)
}
}
}
func (s *DockerSuite) TestDaemonStartWithDaemonCommand(c *check.C) {
type kind int
const (
common kind = iota
daemon
)
var flags = []map[kind][]string{
{common: {"-l", "info"}, daemon: {"--selinux-enabled"}},
{common: {"-D"}, daemon: {"--selinux-enabled", "-r"}},
{common: {"-D"}, daemon: {"--restart"}},
{common: {"--debug"}, daemon: {"--log-driver=json-file", "--log-opt=max-size=1k"}},
}
var invalidGlobalFlags = [][]string{
//Invalid because you cannot pass daemon flags as global flags.
{"--selinux-enabled", "-l", "info"},
{"-D", "-r"},
{"--config", "/tmp"},
}
// `docker daemon -l info --selinux-enabled`
// should NOT error out
for _, f := range flags {
d := NewDaemon(c)
args := append(f[common], f[daemon]...)
if err := d.Start(args...); err != nil {
c.Fatalf("Daemon should have started successfully with %v: %v", args, err)
}
d.Stop()
}
// `docker -l info daemon --selinux-enabled`
// should error out
for _, f := range flags {
d := NewDaemon(c)
d.GlobalFlags = f[common]
if err := d.Start(f[daemon]...); err == nil {
d.Stop()
c.Fatalf("Daemon should have failed to start with docker %v daemon %v", d.GlobalFlags, f[daemon])
}
}
for _, f := range invalidGlobalFlags {
cmd := exec.Command(dockerBinary, append(f, "daemon")...)
errch := make(chan error)
var err error
go func() {
errch <- cmd.Run()
}()
select {
case <-time.After(time.Second):
cmd.Process.Kill()
case err = <-errch:
}
if err == nil {
c.Fatalf("Daemon should have failed to start with docker %v daemon", f)
}
}
}
func (s *DockerDaemonSuite) TestDaemonLogLevelDebug(c *check.C) {
if err := s.d.Start("--log-level=debug"); err != nil {
c.Fatal(err)
}
content, _ := ioutil.ReadFile(s.d.logFile.Name())
if !strings.Contains(string(content), `level=debug`) {
c.Fatalf(`Missing level="debug" in log file:\n%s`, string(content))
}
}
func (s *DockerDaemonSuite) TestDaemonLogLevelFatal(c *check.C) {
// we creating new daemons to create new logFile
if err := s.d.Start("--log-level=fatal"); err != nil {
c.Fatal(err)
}
content, _ := ioutil.ReadFile(s.d.logFile.Name())
if strings.Contains(string(content), `level=debug`) {
c.Fatalf(`Should not have level="debug" in log file:\n%s`, string(content))
}
}
func (s *DockerDaemonSuite) TestDaemonFlagD(c *check.C) {
if err := s.d.Start("-D"); err != nil {
c.Fatal(err)
}
content, _ := ioutil.ReadFile(s.d.logFile.Name())
if !strings.Contains(string(content), `level=debug`) {
c.Fatalf(`Should have level="debug" in log file using -D:\n%s`, string(content))
}
}
func (s *DockerDaemonSuite) TestDaemonFlagDebug(c *check.C) {
if err := s.d.Start("--debug"); err != nil {
c.Fatal(err)
}
content, _ := ioutil.ReadFile(s.d.logFile.Name())
if !strings.Contains(string(content), `level=debug`) {
c.Fatalf(`Should have level="debug" in log file using --debug:\n%s`, string(content))
}
}
func (s *DockerDaemonSuite) TestDaemonFlagDebugLogLevelFatal(c *check.C) {
if err := s.d.Start("--debug", "--log-level=fatal"); err != nil {
c.Fatal(err)
}
content, _ := ioutil.ReadFile(s.d.logFile.Name())
if !strings.Contains(string(content), `level=debug`) {
c.Fatalf(`Should have level="debug" in log file when using both --debug and --log-level=fatal:\n%s`, string(content))
}
}
func (s *DockerDaemonSuite) TestDaemonAllocatesListeningPort(c *check.C) {
listeningPorts := [][]string{
{"0.0.0.0", "0.0.0.0", "5678"},
{"127.0.0.1", "127.0.0.1", "1234"},
{"localhost", "127.0.0.1", "1235"},
}
cmdArgs := make([]string, 0, len(listeningPorts)*2)
for _, hostDirective := range listeningPorts {
cmdArgs = append(cmdArgs, "--host", fmt.Sprintf("tcp://%s:%s", hostDirective[0], hostDirective[2]))
}
if err := s.d.StartWithBusybox(cmdArgs...); err != nil {
c.Fatalf("Could not start daemon with busybox: %v", err)
}
for _, hostDirective := range listeningPorts {
output, err := s.d.Cmd("run", "-p", fmt.Sprintf("%s:%s:80", hostDirective[1], hostDirective[2]), "busybox", "true")
if err == nil {
c.Fatalf("Container should not start, expected port already allocated error: %q", output)
} else if !strings.Contains(output, "port is already allocated") {
c.Fatalf("Expected port is already allocated error: %q", output)
}
}
}
func (s *DockerDaemonSuite) TestDaemonKeyGeneration(c *check.C) {
// TODO: skip or update for Windows daemon
os.Remove("/etc/docker/key.json")
if err := s.d.Start(); err != nil {
c.Fatalf("Could not start daemon: %v", err)
}
s.d.Stop()
k, err := libtrust.LoadKeyFile("/etc/docker/key.json")
if err != nil {
c.Fatalf("Error opening key file")
}
kid := k.KeyID()
// Test Key ID is a valid fingerprint (e.g. QQXN:JY5W:TBXI:MK3X:GX6P:PD5D:F56N:NHCS:LVRZ:JA46:R24J:XEFF)
if len(kid) != 59 {
c.Fatalf("Bad key ID: %s", kid)
}
}
func (s *DockerDaemonSuite) TestDaemonKeyMigration(c *check.C) {
// TODO: skip or update for Windows daemon
os.Remove("/etc/docker/key.json")
k1, err := libtrust.GenerateECP256PrivateKey()
if err != nil {
c.Fatalf("Error generating private key: %s", err)
}
if err := os.MkdirAll(filepath.Join(os.Getenv("HOME"), ".docker"), 0755); err != nil {
c.Fatalf("Error creating .docker directory: %s", err)
}
if err := libtrust.SaveKey(filepath.Join(os.Getenv("HOME"), ".docker", "key.json"), k1); err != nil {
c.Fatalf("Error saving private key: %s", err)
}
if err := s.d.Start(); err != nil {
c.Fatalf("Could not start daemon: %v", err)
}
s.d.Stop()
k2, err := libtrust.LoadKeyFile("/etc/docker/key.json")
if err != nil {
c.Fatalf("Error opening key file")
}
if k1.KeyID() != k2.KeyID() {
c.Fatalf("Key not migrated")
}
}
// GH#11320 - verify that the daemon exits on failure properly
// Note that this explicitly tests the conflict of {-b,--bridge} and {--bip} options as the means
// to get a daemon init failure; no other tests for -b/--bip conflict are therefore required
func (s *DockerDaemonSuite) TestDaemonExitOnFailure(c *check.C) {
//attempt to start daemon with incorrect flags (we know -b and --bip conflict)
if err := s.d.Start("--bridge", "nosuchbridge", "--bip", "1.1.1.1"); err != nil {
//verify we got the right error
if !strings.Contains(err.Error(), "Daemon exited and never started") {
c.Fatalf("Expected daemon not to start, got %v", err)
}
// look in the log and make sure we got the message that daemon is shutting down
runCmd := exec.Command("grep", "Error starting daemon", s.d.LogfileName())
if out, _, err := runCommandWithOutput(runCmd); err != nil {
c.Fatalf("Expected 'Error starting daemon' message; but doesn't exist in log: %q, err: %v", out, err)
}
} else {
//if we didn't get an error and the daemon is running, this is a failure
c.Fatal("Conflicting options should cause the daemon to error out with a failure")
}
}
func (s *DockerDaemonSuite) TestDaemonBridgeExternal(c *check.C) {
d := s.d
err := d.Start("--bridge", "nosuchbridge")
c.Assert(err, check.NotNil, check.Commentf("--bridge option with an invalid bridge should cause the daemon to fail"))
defer d.Restart()
bridgeName := "external-bridge"
bridgeIP := "192.169.1.1/24"
_, bridgeIPNet, _ := net.ParseCIDR(bridgeIP)
out, err := createInterface(c, "bridge", bridgeName, bridgeIP)
c.Assert(err, check.IsNil, check.Commentf(out))
defer deleteInterface(c, bridgeName)
err = d.StartWithBusybox("--bridge", bridgeName)
c.Assert(err, check.IsNil)
ipTablesSearchString := bridgeIPNet.String()
ipTablesCmd := exec.Command("iptables", "-t", "nat", "-nvL")
out, _, err = runCommandWithOutput(ipTablesCmd)
c.Assert(err, check.IsNil)
c.Assert(strings.Contains(out, ipTablesSearchString), check.Equals, true,
check.Commentf("iptables output should have contained %q, but was %q",
ipTablesSearchString, out))
_, err = d.Cmd("run", "-d", "--name", "ExtContainer", "busybox", "top")
c.Assert(err, check.IsNil)
containerIP := d.findContainerIP("ExtContainer")
ip := net.ParseIP(containerIP)
c.Assert(bridgeIPNet.Contains(ip), check.Equals, true,
check.Commentf("Container IP-Address must be in the same subnet range : %s",
containerIP))
}
func createInterface(c *check.C, ifType string, ifName string, ipNet string) (string, error) {
args := []string{"link", "add", "name", ifName, "type", ifType}
ipLinkCmd := exec.Command("ip", args...)
out, _, err := runCommandWithOutput(ipLinkCmd)
if err != nil {
return out, err
}
ifCfgCmd := exec.Command("ifconfig", ifName, ipNet, "up")
out, _, err = runCommandWithOutput(ifCfgCmd)
return out, err
}
func deleteInterface(c *check.C, ifName string) {
ifCmd := exec.Command("ip", "link", "delete", ifName)
out, _, err := runCommandWithOutput(ifCmd)
c.Assert(err, check.IsNil, check.Commentf(out))
flushCmd := exec.Command("iptables", "-t", "nat", "--flush")
out, _, err = runCommandWithOutput(flushCmd)
c.Assert(err, check.IsNil, check.Commentf(out))
flushCmd = exec.Command("iptables", "--flush")
out, _, err = runCommandWithOutput(flushCmd)
c.Assert(err, check.IsNil, check.Commentf(out))
}
func (s *DockerDaemonSuite) TestDaemonBridgeIP(c *check.C) {
// TestDaemonBridgeIP Steps
// 1. Delete the existing docker0 Bridge
// 2. Set --bip daemon configuration and start the new Docker Daemon
// 3. Check if the bip config has taken effect using ifconfig and iptables commands
// 4. Launch a Container and make sure the IP-Address is in the expected subnet
// 5. Delete the docker0 Bridge
// 6. Restart the Docker Daemon (via deferred action)
// This Restart takes care of bringing docker0 interface back to auto-assigned IP
defaultNetworkBridge := "docker0"
deleteInterface(c, defaultNetworkBridge)
d := s.d
bridgeIP := "192.169.1.1/24"
ip, bridgeIPNet, _ := net.ParseCIDR(bridgeIP)
err := d.StartWithBusybox("--bip", bridgeIP)
c.Assert(err, check.IsNil)
defer d.Restart()
ifconfigSearchString := ip.String()
ifconfigCmd := exec.Command("ifconfig", defaultNetworkBridge)
out, _, _, err := runCommandWithStdoutStderr(ifconfigCmd)
c.Assert(err, check.IsNil)
c.Assert(strings.Contains(out, ifconfigSearchString), check.Equals, true,
check.Commentf("ifconfig output should have contained %q, but was %q",
ifconfigSearchString, out))
ipTablesSearchString := bridgeIPNet.String()
ipTablesCmd := exec.Command("iptables", "-t", "nat", "-nvL")
out, _, err = runCommandWithOutput(ipTablesCmd)
c.Assert(err, check.IsNil)
c.Assert(strings.Contains(out, ipTablesSearchString), check.Equals, true,
check.Commentf("iptables output should have contained %q, but was %q",
ipTablesSearchString, out))
out, err = d.Cmd("run", "-d", "--name", "test", "busybox", "top")
c.Assert(err, check.IsNil)
containerIP := d.findContainerIP("test")
ip = net.ParseIP(containerIP)
c.Assert(bridgeIPNet.Contains(ip), check.Equals, true,
check.Commentf("Container IP-Address must be in the same subnet range : %s",
containerIP))
deleteInterface(c, defaultNetworkBridge)
}
func (s *DockerDaemonSuite) TestDaemonRestartWithBridgeIPChange(c *check.C) {
if err := s.d.Start(); err != nil {
c.Fatalf("Could not start daemon: %v", err)
}
defer s.d.Restart()
if err := s.d.Stop(); err != nil {
c.Fatalf("Could not stop daemon: %v", err)
}
// now we will change the docker0's IP and then try starting the daemon
bridgeIP := "192.169.100.1/24"
_, bridgeIPNet, _ := net.ParseCIDR(bridgeIP)
ipCmd := exec.Command("ifconfig", "docker0", bridgeIP)
stdout, stderr, _, err := runCommandWithStdoutStderr(ipCmd)
if err != nil {
c.Fatalf("failed to change docker0's IP association: %v, stdout: %q, stderr: %q", err, stdout, stderr)
}
if err := s.d.Start("--bip", bridgeIP); err != nil {
c.Fatalf("Could not start daemon: %v", err)
}
//check if the iptables contains new bridgeIP MASQUERADE rule
ipTablesSearchString := bridgeIPNet.String()
ipTablesCmd := exec.Command("iptables", "-t", "nat", "-nvL")
out, _, err := runCommandWithOutput(ipTablesCmd)
if err != nil {
c.Fatalf("Could not run iptables -nvL: %s, %v", out, err)
}
if !strings.Contains(out, ipTablesSearchString) {
c.Fatalf("iptables output should have contained new MASQUERADE rule with IP %q, but was %q", ipTablesSearchString, out)
}
}
func (s *DockerDaemonSuite) TestDaemonBridgeFixedCidr(c *check.C) {
d := s.d
bridgeName := "external-bridge"
bridgeIP := "192.169.1.1/24"
out, err := createInterface(c, "bridge", bridgeName, bridgeIP)
c.Assert(err, check.IsNil, check.Commentf(out))
defer deleteInterface(c, bridgeName)
args := []string{"--bridge", bridgeName, "--fixed-cidr", "192.169.1.0/30"}
err = d.StartWithBusybox(args...)
c.Assert(err, check.IsNil)
defer d.Restart()
for i := 0; i < 4; i++ {
cName := "Container" + strconv.Itoa(i)
out, err := d.Cmd("run", "-d", "--name", cName, "busybox", "top")
if err != nil {
c.Assert(strings.Contains(out, "no available ip addresses"), check.Equals, true,
check.Commentf("Could not run a Container : %s %s", err.Error(), out))
}
}
}
func (s *DockerDaemonSuite) TestDaemonDefaultGatewayIPv4Implicit(c *check.C) {
defaultNetworkBridge := "docker0"
deleteInterface(c, defaultNetworkBridge)
d := s.d
bridgeIP := "192.169.1.1"
bridgeIPNet := fmt.Sprintf("%s/24", bridgeIP)
err := d.StartWithBusybox("--bip", bridgeIPNet)
c.Assert(err, check.IsNil)
defer d.Restart()
expectedMessage := fmt.Sprintf("default via %s dev", bridgeIP)
out, err := d.Cmd("run", "busybox", "ip", "-4", "route", "list", "0/0")
c.Assert(strings.Contains(out, expectedMessage), check.Equals, true,
check.Commentf("Implicit default gateway should be bridge IP %s, but default route was '%s'",
bridgeIP, strings.TrimSpace(out)))
deleteInterface(c, defaultNetworkBridge)
}
func (s *DockerDaemonSuite) TestDaemonDefaultGatewayIPv4Explicit(c *check.C) {
defaultNetworkBridge := "docker0"
deleteInterface(c, defaultNetworkBridge)
d := s.d
bridgeIP := "192.169.1.1"
bridgeIPNet := fmt.Sprintf("%s/24", bridgeIP)
gatewayIP := "192.169.1.254"
err := d.StartWithBusybox("--bip", bridgeIPNet, "--default-gateway", gatewayIP)
c.Assert(err, check.IsNil)
defer d.Restart()
expectedMessage := fmt.Sprintf("default via %s dev", gatewayIP)
out, err := d.Cmd("run", "busybox", "ip", "-4", "route", "list", "0/0")
c.Assert(strings.Contains(out, expectedMessage), check.Equals, true,
check.Commentf("Explicit default gateway should be %s, but default route was '%s'",
gatewayIP, strings.TrimSpace(out)))
deleteInterface(c, defaultNetworkBridge)
}
func (s *DockerDaemonSuite) TestDaemonDefaultGatewayIPv4ExplicitOutsideContainerSubnet(c *check.C) {
defaultNetworkBridge := "docker0"
deleteInterface(c, defaultNetworkBridge)
// Program a custom default gateway outside of the container subnet, daemon should accept it and start
err := s.d.StartWithBusybox("--bip", "172.16.0.10/16", "--fixed-cidr", "172.16.1.0/24", "--default-gateway", "172.16.0.254")
c.Assert(err, check.IsNil)
deleteInterface(c, defaultNetworkBridge)
s.d.Restart()
}
func (s *DockerDaemonSuite) TestDaemonIP(c *check.C) {
d := s.d
ipStr := "192.170.1.1/24"
ip, _, _ := net.ParseCIDR(ipStr)
args := []string{"--ip", ip.String()}
err := d.StartWithBusybox(args...)
c.Assert(err, check.IsNil)
defer d.Restart()
out, err := d.Cmd("run", "-d", "-p", "8000:8000", "busybox", "top")
c.Assert(err, check.NotNil,
check.Commentf("Running a container must fail with an invalid --ip option"))
c.Assert(strings.Contains(out, "Error starting userland proxy"), check.Equals, true)
ifName := "dummy"
out, err = createInterface(c, "dummy", ifName, ipStr)
c.Assert(err, check.IsNil, check.Commentf(out))
defer deleteInterface(c, ifName)
_, err = d.Cmd("run", "-d", "-p", "8000:8000", "busybox", "top")
c.Assert(err, check.IsNil)
ipTablesCmd := exec.Command("iptables", "-t", "nat", "-nvL")
out, _, err = runCommandWithOutput(ipTablesCmd)
c.Assert(err, check.IsNil)
regex := fmt.Sprintf("DNAT.*%s.*dpt:8000", ip.String())
matched, _ := regexp.MatchString(regex, out)
c.Assert(matched, check.Equals, true,
check.Commentf("iptables output should have contained %q, but was %q", regex, out))
}
func (s *DockerDaemonSuite) TestDaemonICCPing(c *check.C) {
d := s.d
bridgeName := "external-bridge"
bridgeIP := "192.169.1.1/24"
out, err := createInterface(c, "bridge", bridgeName, bridgeIP)
c.Assert(err, check.IsNil, check.Commentf(out))
defer deleteInterface(c, bridgeName)
args := []string{"--bridge", bridgeName, "--icc=false"}
err = d.StartWithBusybox(args...)
c.Assert(err, check.IsNil)
defer d.Restart()
ipTablesCmd := exec.Command("iptables", "-nvL", "FORWARD")
out, _, err = runCommandWithOutput(ipTablesCmd)
c.Assert(err, check.IsNil)
regex := fmt.Sprintf("DROP.*all.*%s.*%s", bridgeName, bridgeName)
matched, _ := regexp.MatchString(regex, out)
c.Assert(matched, check.Equals, true,
check.Commentf("iptables output should have contained %q, but was %q", regex, out))
// Pinging another container must fail with --icc=false
pingContainers(c, d, true)
ipStr := "192.171.1.1/24"
ip, _, _ := net.ParseCIDR(ipStr)
ifName := "icc-dummy"
createInterface(c, "dummy", ifName, ipStr)
// But, Pinging external or a Host interface must succeed
pingCmd := fmt.Sprintf("ping -c 1 %s -W 1", ip.String())
runArgs := []string{"--rm", "busybox", "sh", "-c", pingCmd}
_, err = d.Cmd("run", runArgs...)
c.Assert(err, check.IsNil)
}
func (s *DockerDaemonSuite) TestDaemonICCLinkExpose(c *check.C) {
d := s.d
bridgeName := "external-bridge"
bridgeIP := "192.169.1.1/24"
out, err := createInterface(c, "bridge", bridgeName, bridgeIP)
c.Assert(err, check.IsNil, check.Commentf(out))
defer deleteInterface(c, bridgeName)
args := []string{"--bridge", bridgeName, "--icc=false"}
err = d.StartWithBusybox(args...)
c.Assert(err, check.IsNil)
defer d.Restart()
ipTablesCmd := exec.Command("iptables", "-nvL", "FORWARD")
out, _, err = runCommandWithOutput(ipTablesCmd)
c.Assert(err, check.IsNil)
regex := fmt.Sprintf("DROP.*all.*%s.*%s", bridgeName, bridgeName)
matched, _ := regexp.MatchString(regex, out)
c.Assert(matched, check.Equals, true,
check.Commentf("iptables output should have contained %q, but was %q", regex, out))
out, err = d.Cmd("run", "-d", "--expose", "4567", "--name", "icc1", "busybox", "nc", "-l", "-p", "4567")
c.Assert(err, check.IsNil, check.Commentf(out))
out, err = d.Cmd("run", "--link", "icc1:icc1", "busybox", "nc", "icc1", "4567")
c.Assert(err, check.IsNil, check.Commentf(out))
}
func (s *DockerDaemonSuite) TestDaemonLinksIpTablesRulesWhenLinkAndUnlink(c *check.C) {
bridgeName := "external-bridge"
bridgeIP := "192.169.1.1/24"
out, err := createInterface(c, "bridge", bridgeName, bridgeIP)
c.Assert(err, check.IsNil, check.Commentf(out))
defer deleteInterface(c, bridgeName)
err = s.d.StartWithBusybox("--bridge", bridgeName, "--icc=false")
c.Assert(err, check.IsNil)
defer s.d.Restart()
_, err = s.d.Cmd("run", "-d", "--name", "child", "--publish", "8080:80", "busybox", "top")
c.Assert(err, check.IsNil)
_, err = s.d.Cmd("run", "-d", "--name", "parent", "--link", "child:http", "busybox", "top")
c.Assert(err, check.IsNil)
childIP := s.d.findContainerIP("child")
parentIP := s.d.findContainerIP("parent")
sourceRule := []string{"-i", bridgeName, "-o", bridgeName, "-p", "tcp", "-s", childIP, "--sport", "80", "-d", parentIP, "-j", "ACCEPT"}
destinationRule := []string{"-i", bridgeName, "-o", bridgeName, "-p", "tcp", "-s", parentIP, "--dport", "80", "-d", childIP, "-j", "ACCEPT"}
if !iptables.Exists("filter", "DOCKER", sourceRule...) || !iptables.Exists("filter", "DOCKER", destinationRule...) {
c.Fatal("Iptables rules not found")
}
s.d.Cmd("rm", "--link", "parent/http")
if iptables.Exists("filter", "DOCKER", sourceRule...) || iptables.Exists("filter", "DOCKER", destinationRule...) {
c.Fatal("Iptables rules should be removed when unlink")
}
s.d.Cmd("kill", "child")
s.d.Cmd("kill", "parent")
}
func (s *DockerDaemonSuite) TestDaemonUlimitDefaults(c *check.C) {
testRequires(c, NativeExecDriver)
if err := s.d.StartWithBusybox("--default-ulimit", "nofile=42:42", "--default-ulimit", "nproc=1024:1024"); err != nil {
c.Fatal(err)
}
out, err := s.d.Cmd("run", "--ulimit", "nproc=2048", "--name=test", "busybox", "/bin/sh", "-c", "echo $(ulimit -n); echo $(ulimit -p)")
if err != nil {
c.Fatal(out, err)
}