예제 #1
0
func init() {
	Describe("settingsService", func() {
		var (
			fs                         *fakesys.FakeFileSystem
			fakeDefaultNetworkResolver *fakenet.FakeDefaultNetworkResolver
			fakeSettingsSource         *fakes.FakeSettingsSource
		)

		BeforeEach(func() {
			fs = fakesys.NewFakeFileSystem()
			fakeDefaultNetworkResolver = &fakenet.FakeDefaultNetworkResolver{}
			fakeSettingsSource = &fakes.FakeSettingsSource{}
		})

		buildService := func() (Service, *fakesys.FakeFileSystem) {
			logger := boshlog.NewLogger(boshlog.LevelNone)
			service := NewService(fs, "/setting/path.json", fakeSettingsSource, fakeDefaultNetworkResolver, logger)
			return service, fs
		}

		Describe("LoadSettings", func() {
			var (
				fetchedSettings Settings
				fetcherFuncErr  error
				service         Service
			)

			BeforeEach(func() {
				fetchedSettings = Settings{}
				fetcherFuncErr = nil
			})

			JustBeforeEach(func() {
				fakeSettingsSource.SettingsValue = fetchedSettings
				fakeSettingsSource.SettingsErr = fetcherFuncErr
				service, fs = buildService()
			})

			Context("when settings fetcher succeeds fetching settings", func() {
				BeforeEach(func() {
					fetchedSettings = Settings{AgentID: "some-new-agent-id"}
				})

				Context("when settings contain at most one dynamic network", func() {
					BeforeEach(func() {
						fetchedSettings.Networks = Networks{
							"fake-net-1": Network{Type: NetworkTypeDynamic},
						}
					})

					It("updates the service with settings from the fetcher", func() {
						err := service.LoadSettings()
						Expect(err).NotTo(HaveOccurred())
						Expect(service.GetSettings().AgentID).To(Equal("some-new-agent-id"))
					})

					It("persists settings to the settings file", func() {
						err := service.LoadSettings()
						Expect(err).NotTo(HaveOccurred())

						json, err := json.Marshal(fetchedSettings)
						Expect(err).NotTo(HaveOccurred())

						fileContent, err := fs.ReadFile("/setting/path.json")
						Expect(err).NotTo(HaveOccurred())
						Expect(fileContent).To(Equal(json))
					})

					It("returns any error from writing to the setting file", func() {
						fs.WriteFileError = errors.New("fs-write-file-error")

						err := service.LoadSettings()
						Expect(err).To(HaveOccurred())
						Expect(err.Error()).To(ContainSubstring("fs-write-file-error"))
					})
				})
			})

			Context("when settings fetcher fails fetching settings", func() {
				BeforeEach(func() {
					fetcherFuncErr = errors.New("fake-fetch-error")
				})

				Context("when a settings file exists", func() {
					Context("when settings contain at most one dynamic network", func() {
						BeforeEach(func() {
							fs.WriteFile("/setting/path.json", []byte(`{
								"agent_id":"some-agent-id",
								"networks": {"fake-net-1": {"type": "dynamic"}}
							}`))

							fakeDefaultNetworkResolver.GetDefaultNetworkNetwork = Network{
								IP:      "fake-resolved-ip",
								Netmask: "fake-resolved-netmask",
								Gateway: "fake-resolved-gateway",
							}
						})

						It("returns settings from the settings file with resolved network", func() {
							err := service.LoadSettings()
							Expect(err).ToNot(HaveOccurred())
							Expect(service.GetSettings()).To(Equal(Settings{
								AgentID: "some-agent-id",
								Networks: Networks{
									"fake-net-1": Network{
										Type:     NetworkTypeDynamic,
										IP:       "fake-resolved-ip",
										Netmask:  "fake-resolved-netmask",
										Gateway:  "fake-resolved-gateway",
										Resolved: true,
									},
								},
							}))
						})
					})
				})

				Context("when non-unmarshallable settings file exists", func() {
					It("returns any error from the fetcher", func() {
						fs.WriteFile("/setting/path.json", []byte(`$%^&*(`))

						err := service.LoadSettings()
						Expect(err).To(HaveOccurred())
						Expect(err.Error()).To(ContainSubstring("fake-fetch-error"))

						Expect(service.GetSettings()).To(Equal(Settings{}))
					})
				})

				Context("when no settings file exists", func() {
					It("returns any error from the fetcher", func() {
						err := service.LoadSettings()
						Expect(err).To(HaveOccurred())
						Expect(err.Error()).To(ContainSubstring("fake-fetch-error"))

						Expect(service.GetSettings()).To(Equal(Settings{}))
					})
				})
			})
		})

		Describe("InvalidateSettings", func() {
			It("removes the settings file", func() {
				fakeSettingsSource.SettingsValue = Settings{}
				fakeSettingsSource.SettingsErr = nil
				service, fs := buildService()

				fs.WriteFile("/setting/path.json", []byte(`{}`))

				err := service.InvalidateSettings()
				Expect(err).ToNot(HaveOccurred())

				Expect(fs.FileExists("/setting/path.json")).To(BeFalse())
			})

			It("returns err if removing settings file errored", func() {
				fakeSettingsSource.SettingsValue = Settings{}
				fakeSettingsSource.SettingsErr = nil
				service, fs := buildService()

				fs.RemoveAllError = errors.New("fs-remove-all-error")

				err := service.InvalidateSettings()
				Expect(err).To(HaveOccurred())
				Expect(err.Error()).To(ContainSubstring("fs-remove-all-error"))
			})
		})

		Describe("GetSettings", func() {
			var (
				loadedSettings Settings
				service        Service
			)

			BeforeEach(func() {
				loadedSettings = Settings{AgentID: "some-agent-id"}
			})

			JustBeforeEach(func() {
				fakeSettingsSource.SettingsValue = loadedSettings
				fakeSettingsSource.SettingsErr = nil
				service, _ = buildService()
				err := service.LoadSettings()
				Expect(err).NotTo(HaveOccurred())
			})

			Context("when there is are no dynamic networks", func() {
				It("returns settings without modifying any networks", func() {
					Expect(service.GetSettings()).To(Equal(loadedSettings))
				})

				It("does not try to determine default network", func() {
					_ = service.GetSettings()
					Expect(fakeDefaultNetworkResolver.GetDefaultNetworkCalled).To(BeFalse())
				})
			})

			Context("when there is network that needs to be resolved (ip, netmask, or mac are not set)", func() {
				BeforeEach(func() {
					loadedSettings = Settings{
						Networks: map[string]Network{
							"fake-net1": Network{
								IP:      "fake-net1-ip",
								Netmask: "fake-net1-netmask",
								Mac:     "fake-net1-mac",
								Gateway: "fake-net1-gateway",
							},
							"fake-net2": Network{
								Gateway: "fake-net2-gateway",
								DNS:     []string{"fake-net2-dns"},
							},
						},
					}
				})

				Context("when default network can be retrieved", func() {
					BeforeEach(func() {
						fakeDefaultNetworkResolver.GetDefaultNetworkNetwork = Network{
							IP:      "fake-resolved-ip",
							Netmask: "fake-resolved-netmask",
							Gateway: "fake-resolved-gateway",
						}
					})

					It("returns settings with resolved dynamic network ip, netmask, gateway and keeping everything else the same", func() {
						settings := service.GetSettings()
						Expect(settings).To(Equal(Settings{
							Networks: map[string]Network{
								"fake-net1": Network{
									IP:      "fake-net1-ip",
									Netmask: "fake-net1-netmask",
									Mac:     "fake-net1-mac",
									Gateway: "fake-net1-gateway",
								},
								"fake-net2": Network{
									IP:       "fake-resolved-ip",
									Netmask:  "fake-resolved-netmask",
									Gateway:  "fake-resolved-gateway",
									DNS:      []string{"fake-net2-dns"},
									Resolved: true,
								},
							},
						}))
					})
				})

				Context("when default network fails to be retrieved", func() {
					BeforeEach(func() {
						fakeDefaultNetworkResolver.GetDefaultNetworkErr = errors.New("fake-get-default-network-err")
					})

					It("returns error", func() {
						settings := service.GetSettings()
						Expect(settings).To(Equal(loadedSettings))
					})
				})
			})
		})
	})
}
예제 #2
0
func init() {
	Describe("bootstrap", func() {
		Describe("Run", func() {
			var (
				platform    *fakeplatform.FakePlatform
				dirProvider boshdir.Provider

				settingsSource  *fakeinf.FakeSettingsSource
				settingsService *fakesettings.FakeSettingsService
			)

			BeforeEach(func() {
				platform = fakeplatform.NewFakePlatform()
				dirProvider = boshdir.NewProvider("/var/vcap")

				settingsSource = &fakeinf.FakeSettingsSource{}
				settingsService = &fakesettings.FakeSettingsService{}
			})

			bootstrap := func() error {
				logger := boshlog.NewLogger(boshlog.LevelNone)
				return NewBootstrap(platform, dirProvider, settingsService, logger).Run()
			}

			It("sets up runtime configuration", func() {
				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(platform.SetupRuntimeConfigurationWasInvoked).To(BeTrue())
			})

			Describe("SSH tunnel setup for registry", func() {
				It("returns error without configuring ssh on the platform if getting public key fails", func() {
					settingsService.PublicKeyErr = errors.New("fake-get-public-key-err")

					err := bootstrap()
					Expect(err).To(HaveOccurred())
					Expect(err.Error()).To(ContainSubstring("fake-get-public-key-err"))

					Expect(platform.SetupSSHCalled).To(BeFalse())
				})

				Context("when public key is not empty", func() {
					BeforeEach(func() {
						settingsService.PublicKey = "fake-public-key"
					})

					It("gets the public key and sets up ssh via the platform", func() {
						err := bootstrap()
						Expect(err).NotTo(HaveOccurred())

						Expect(platform.SetupSSHPublicKey).To(Equal("fake-public-key"))
						Expect(platform.SetupSSHUsername).To(Equal("vcap"))
					})

					It("returns error if configuring ssh on the platform fails", func() {
						platform.SetupSSHErr = errors.New("fake-setup-ssh-err")

						err := bootstrap()
						Expect(err).To(HaveOccurred())
						Expect(err.Error()).To(ContainSubstring("fake-setup-ssh-err"))
					})
				})

				Context("when public key key is empty", func() {
					BeforeEach(func() {
						settingsSource.PublicKey = ""
					})

					It("gets the public key and does not setup SSH", func() {
						err := bootstrap()
						Expect(err).NotTo(HaveOccurred())

						Expect(platform.SetupSSHCalled).To(BeFalse())
					})
				})
			})

			It("sets up hostname", func() {
				settingsService.Settings.AgentID = "foo-bar-baz-123"

				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(platform.SetupHostnameHostname).To(Equal("foo-bar-baz-123"))
			})

			It("fetches initial settings", func() {
				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(settingsService.SettingsWereLoaded).To(BeTrue())
			})

			It("returns error from loading initial settings", func() {
				settingsService.LoadSettingsError = errors.New("fake-load-error")

				err := bootstrap()
				Expect(err).To(HaveOccurred())
				Expect(err.Error()).To(ContainSubstring("fake-load-error"))
			})

			It("sets up networking", func() {
				networks := boshsettings.Networks{
					"bosh": boshsettings.Network{},
				}
				settingsService.Settings.Networks = networks

				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(platform.SetupNetworkingNetworks).To(Equal(networks))
			})

			It("sets up ephemeral disk", func() {
				settingsService.Settings.Disks = boshsettings.Disks{
					Ephemeral: "fake-ephemeral-disk-setting",
				}

				platform.GetEphemeralDiskPathRealPath = "/dev/sda"

				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(platform.SetupEphemeralDiskWithPathDevicePath).To(Equal("/dev/sda"))
				Expect(platform.GetEphemeralDiskPathSettings).To(Equal(boshsettings.DiskSettings{
					VolumeID: "fake-ephemeral-disk-setting",
					Path:     "fake-ephemeral-disk-setting",
				}))
			})

			It("returns error if setting ephemeral disk fails", func() {
				platform.SetupEphemeralDiskWithPathErr = errors.New("fake-setup-ephemeral-disk-err")
				err := bootstrap()
				Expect(err).To(HaveOccurred())
				Expect(err.Error()).To(ContainSubstring("fake-setup-ephemeral-disk-err"))
			})

			It("sets up raw ephemeral disks if paths exist", func() {
				settingsService.Settings.Disks = boshsettings.Disks{
					RawEphemeral: []boshsettings.DiskSettings{{Path: "/dev/xvdb"}, {Path: "/dev/xvdc"}},
				}

				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(platform.SetupRawEphemeralDisksCallCount).To(Equal(1))
				Expect(len(platform.SetupRawEphemeralDisksDevices)).To(Equal(2))
				Expect(platform.SetupRawEphemeralDisksDevices[0].Path).To(Equal("/dev/xvdb"))
				Expect(platform.SetupRawEphemeralDisksDevices[1].Path).To(Equal("/dev/xvdc"))
			})

			It("returns error if setting raw ephemeral disks fails", func() {
				platform.SetupRawEphemeralDisksErr = errors.New("fake-setup-raw-ephemeral-disks-err")
				err := bootstrap()
				Expect(platform.SetupRawEphemeralDisksCallCount).To(Equal(1))
				Expect(err).To(HaveOccurred())
				Expect(err.Error()).To(ContainSubstring("fake-setup-raw-ephemeral-disks-err"))
			})

			It("sets up data dir", func() {
				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(platform.SetupDataDirCalled).To(BeTrue())
			})

			It("returns error if set up of data dir fails", func() {
				platform.SetupDataDirErr = errors.New("fake-setup-data-dir-err")
				err := bootstrap()
				Expect(err).To(HaveOccurred())
				Expect(err.Error()).To(ContainSubstring("fake-setup-data-dir-err"))
			})

			It("sets up tmp dir", func() {
				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(platform.SetupTmpDirCalled).To(BeTrue())
			})

			It("returns error if set up of tmp dir fails", func() {
				platform.SetupTmpDirErr = errors.New("fake-setup-tmp-dir-err")
				err := bootstrap()
				Expect(err).To(HaveOccurred())
				Expect(err.Error()).To(ContainSubstring("fake-setup-tmp-dir-err"))
			})

			It("mounts persistent disk", func() {
				settingsService.Settings.Disks = boshsettings.Disks{
					Persistent: map[string]interface{}{
						"vol-123": map[string]interface{}{
							"volume_id": "2",
							"path":      "/dev/sdb",
						},
					},
				}

				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(platform.MountPersistentDiskSettings).To(Equal(boshsettings.DiskSettings{
					ID:       "vol-123",
					VolumeID: "2",
					Path:     "/dev/sdb",
				}))
				Expect(platform.MountPersistentDiskMountPoint).To(Equal(dirProvider.StoreDir()))
			})

			It("errors if there is more than one persistent disk", func() {
				settingsService.Settings.Disks = boshsettings.Disks{
					Persistent: map[string]interface{}{
						"vol-123": "/dev/sdb",
						"vol-456": "/dev/sdc",
					},
				}

				err := bootstrap()
				Expect(err).To(HaveOccurred())
			})

			It("does not try to mount when no persistent disk", func() {
				settingsService.Settings.Disks = boshsettings.Disks{
					Persistent: map[string]interface{}{},
				}

				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(platform.MountPersistentDiskSettings).To(Equal(boshsettings.DiskSettings{}))
				Expect(platform.MountPersistentDiskMountPoint).To(Equal(""))
			})

			It("grows the root filesystem", func() {
				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(platform.SetupRootDiskCalledTimes).To(Equal(1))
			})

			It("returns an error if growing the root filesystem fails", func() {
				platform.SetupRootDiskError = errors.New("growfs failed")

				err := bootstrap()
				Expect(err).To(HaveOccurred())
				Expect(platform.SetupRootDiskCalledTimes).To(Equal(1))
				Expect(err.Error()).To(ContainSubstring("growfs failed"))
			})

			It("sets root and vcap passwords", func() {
				settingsService.Settings.Env.Bosh.Password = "******"
				settingsService.Settings.Env.Bosh.KeepRootPassword = false

				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(2).To(Equal(len(platform.UserPasswords)))
				Expect("some-encrypted-password").To(Equal(platform.UserPasswords["root"]))
				Expect("some-encrypted-password").To(Equal(platform.UserPasswords["vcap"]))
			})

			It("does not change root password if keep_root_password is set to true", func() {
				settingsService.Settings.Env.Bosh.Password = "******"
				settingsService.Settings.Env.Bosh.KeepRootPassword = true

				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(1).To(Equal(len(platform.UserPasswords)))
				Expect("some-encrypted-password").ToNot(Equal(platform.UserPasswords["root"]))
				Expect("some-encrypted-password").To(Equal(platform.UserPasswords["vcap"]))
			})

			It("does not set password if not provided", func() {
				settingsService.Settings.Env.Bosh.KeepRootPassword = false

				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(0).To(Equal(len(platform.UserPasswords)))
			})

			It("sets ntp", func() {
				settingsService.Settings.Ntp = []string{
					"0.north-america.pool.ntp.org",
					"1.north-america.pool.ntp.org",
				}

				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(2).To(Equal(len(platform.SetTimeWithNtpServersServers)))
				Expect("0.north-america.pool.ntp.org").To(Equal(platform.SetTimeWithNtpServersServers[0]))
				Expect("1.north-america.pool.ntp.org").To(Equal(platform.SetTimeWithNtpServersServers[1]))
			})

			It("setups up monit user", func() {
				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(platform.SetupMonitUserSetup).To(BeTrue())
			})

			It("starts monit", func() {
				err := bootstrap()
				Expect(err).NotTo(HaveOccurred())
				Expect(platform.StartMonitStarted).To(BeTrue())
			})
		})

		Describe("Network setup exercised by Run", func() {
			var (
				settingsJSON string

				fs                     *fakesys.FakeFileSystem
				platform               boshplatform.Platform
				boot                   Bootstrap
				defaultNetworkResolver boshsettings.DefaultNetworkResolver
				logger                 boshlog.Logger
				dirProvider            boshdirs.Provider

				interfaceAddrsProvider *fakeip.FakeInterfaceAddressesProvider
			)

			writeNetworkDevice := func(iface string, macAddress string, isPhysical bool) string {
				interfacePath := fmt.Sprintf("/sys/class/net/%s", iface)
				fs.WriteFile(interfacePath, []byte{})
				if isPhysical {
					fs.WriteFile(fmt.Sprintf("/sys/class/net/%s/device", iface), []byte{})
				}
				fs.WriteFileString(fmt.Sprintf("/sys/class/net/%s/address", iface), fmt.Sprintf("%s\n", macAddress))

				return interfacePath
			}

			stubInterfaces := func(interfaces [][]string) {
				var interfacePaths []string

				for _, iface := range interfaces {
					interfaceName := iface[0]
					interfaceMAC := iface[1]
					interfaceType := iface[2]
					isPhysical := interfaceType == "physical"
					interfacePaths = append(interfacePaths, writeNetworkDevice(interfaceName, interfaceMAC, isPhysical))
				}

				fs.SetGlob("/sys/class/net/*", interfacePaths)
			}

			BeforeEach(func() {
				fs = fakesys.NewFakeFileSystem()
				runner := fakesys.NewFakeCmdRunner()
				dirProvider = boshdirs.NewProvider("/var/vcap/bosh")

				linuxOptions := boshplatform.LinuxOptions{
					CreatePartitionIfNoEphemeralDisk: true,
				}

				logger = boshlog.NewLogger(boshlog.LevelNone)

				diskManager := fakedisk.NewFakeDiskManager()
				diskManager.FakeMountsSearcher.SearchMountsMounts = []boshdisk.Mount{
					{MountPoint: "/", PartitionPath: "rootfs"},
					{MountPoint: "/", PartitionPath: "/dev/vda1"},
				}

				// for the GrowRootFS call to findRootDevicePath
				runner.AddCmdResult(
					"readlink -f /dev/vda1",
					fakesys.FakeCmdResult{Stdout: "/dev/vda1"},
				)

				// for the createEphemeralPartitionsOnRootDevice call to findRootDevicePath
				runner.AddCmdResult(
					"readlink -f /dev/vda1",
					fakesys.FakeCmdResult{Stdout: "/dev/vda1"},
				)

				diskManager.FakeRootDevicePartitioner.GetDeviceSizeInBytesSizes["/dev/vda"] = 1024 * 1024 * 1024

				udev := boshudev.NewConcreteUdevDevice(runner, logger)
				linuxCdrom := boshcdrom.NewLinuxCdrom("/dev/sr0", udev, runner)
				linuxCdutil := boshcdrom.NewCdUtil(dirProvider.SettingsDir(), fs, linuxCdrom, logger)

				compressor := boshcmd.NewTarballCompressor(runner, fs)
				copier := boshcmd.NewCpCopier(runner, fs, logger)

				sigarCollector := boshsigar.NewSigarStatsCollector(&sigar.ConcreteSigar{})

				vitalsService := boshvitals.NewService(sigarCollector, dirProvider)

				ipResolver := boship.NewResolver(boship.NetworkInterfaceToAddrsFunc)

				arping := bosharp.NewArping(runner, fs, logger, boshplatform.ArpIterations, boshplatform.ArpIterationDelay, boshplatform.ArpInterfaceCheckDelay)
				interfaceConfigurationCreator := boshnet.NewInterfaceConfigurationCreator(logger)

				interfaceAddrsProvider = &fakeip.FakeInterfaceAddressesProvider{}
				interfaceAddressesValidator := boship.NewInterfaceAddressesValidator(interfaceAddrsProvider)
				dnsValidator := boshnet.NewDNSValidator(fs)
				fs.WriteFileString("/etc/resolv.conf", "8.8.8.8 4.4.4.4")
				ubuntuNetManager := boshnet.NewUbuntuNetManager(fs, runner, ipResolver, interfaceConfigurationCreator, interfaceAddressesValidator, dnsValidator, arping, logger)

				ubuntuCertManager := boshcert.NewUbuntuCertManager(fs, runner, 1, logger)

				monitRetryable := boshplatform.NewMonitRetryable(runner)
				monitRetryStrategy := boshretry.NewAttemptRetryStrategy(10, 1*time.Second, monitRetryable, logger)

				devicePathResolver := devicepathresolver.NewIdentityDevicePathResolver()

				routesSearcher := boshnet.NewCmdRoutesSearcher(runner)
				defaultNetworkResolver = boshnet.NewDefaultNetworkResolver(routesSearcher, ipResolver)
				state, err := boshplatform.NewBootstrapState(fs, "/tmp/agent_state.json")
				Expect(err).NotTo(HaveOccurred())

				platform = boshplatform.NewLinuxPlatform(
					fs,
					runner,
					sigarCollector,
					compressor,
					copier,
					dirProvider,
					vitalsService,
					linuxCdutil,
					diskManager,
					ubuntuNetManager,
					ubuntuCertManager,
					monitRetryStrategy,
					devicePathResolver,
					500*time.Millisecond,
					state,
					linuxOptions,
					logger,
					defaultNetworkResolver,
				)
			})

			JustBeforeEach(func() {
				settingsPath := filepath.Join("bosh", "settings.json")

				var settings boshsettings.Settings
				json.Unmarshal([]byte(settingsJSON), &settings)

				settingsSource := fakeinf.FakeSettingsSource{
					PublicKey:     "123",
					SettingsValue: settings,
				}

				settingsService := boshsettings.NewService(
					platform.GetFs(),
					settingsPath,
					settingsSource,
					platform,
					logger,
				)

				boot = NewBootstrap(
					platform,
					dirProvider,
					settingsService,
					logger,
				)
			})

			Context("when a single network configuration is provided, with a MAC address", func() {
				BeforeEach(func() {
					settingsJSON = `{
					"networks": {
						"netA": {
							"default": ["dns", "gateway"],
							"ip": "2.2.2.2",
							"dns": [
								"8.8.8.8",
								"4.4.4.4"
							],
							"netmask": "255.255.255.0",
							"gateway": "2.2.2.0",
							"mac": "aa:bb:cc"
						}
					}
				}`
				})

				Context("and no physical network interfaces exist", func() {
					Context("and a single virtual network interface exists", func() {
						BeforeEach(func() {
							stubInterfaces([][]string{[]string{"lo", "aa:bb:cc", "virtual"}})
						})

						It("raises an error", func() {
							err := boot.Run()
							Expect(err).To(HaveOccurred())
							Expect(err.Error()).To(ContainSubstring("Number of network settings '1' is greater than the number of network devices '0"))
						})
					})
				})

				Context("and a single physical network interface exists", func() {
					BeforeEach(func() {
						stubInterfaces([][]string{[]string{"eth0", "aa:bb:cc", "physical"}})
						interfaceAddrsProvider.GetInterfaceAddresses = []boship.InterfaceAddress{
							boship.NewSimpleInterfaceAddress("eth0", "2.2.2.2"),
						}
					})

					It("succeeds", func() {
						err := boot.Run()
						Expect(err).NotTo(HaveOccurred())
					})
				})

				Context("and extra physical network interfaces exist", func() {
					BeforeEach(func() {
						stubInterfaces([][]string{[]string{"eth0", "aa:bb:cc", "physical"}, []string{"eth1", "aa:bb:dd", "physical"}})
						interfaceAddrsProvider.GetInterfaceAddresses = []boship.InterfaceAddress{
							boship.NewSimpleInterfaceAddress("eth0", "2.2.2.2"),
						}
					})

					It("succeeds", func() {
						err := boot.Run()
						Expect(err).NotTo(HaveOccurred())
					})
				})

				Context("and extra virtual network interfaces exist", func() {
					BeforeEach(func() {
						stubInterfaces([][]string{[]string{"eth0", "aa:bb:cc", "physical"}, []string{"lo", "aa:bb:ee", "virtual"}})
						interfaceAddrsProvider.GetInterfaceAddresses = []boship.InterfaceAddress{
							boship.NewSimpleInterfaceAddress("eth0", "2.2.2.2"),
						}
					})

					It("succeeds", func() {
						err := boot.Run()
						Expect(err).ToNot(HaveOccurred())
					})
				})
			})

			Context("when a single network configuration is provided, without a MAC address", func() {
				BeforeEach(func() {
					settingsJSON = `{
					"networks": {
						"netA": {
							"default": ["dns", "gateway"],
							"ip": "2.2.2.2",
							"dns": [
								"8.8.8.8",
								"4.4.4.4"
							],
							"netmask": "255.255.255.0",
							"gateway": "2.2.2.0"
						}
					}
				}`
				})

				Context("and no physical network interfaces exist", func() {
					Context("and a single virtual network interface exists", func() {
						BeforeEach(func() {
							stubInterfaces([][]string{[]string{"lo", "aa:bb:cc", "virtual"}})
						})

						It("raises an error", func() {
							err := boot.Run()
							Expect(err).To(HaveOccurred())
							Expect(err.Error()).To(ContainSubstring("Number of network settings '1' is greater than the number of network devices '0"))
						})
					})
				})

				Context("and a single physical network interface exists", func() {
					BeforeEach(func() {
						stubInterfaces([][]string{[]string{"eth0", "aa:bb:cc", "physical"}})
						interfaceAddrsProvider.GetInterfaceAddresses = []boship.InterfaceAddress{
							boship.NewSimpleInterfaceAddress("eth0", "2.2.2.2"),
						}
					})

					It("succeeds", func() {
						err := boot.Run()
						Expect(err).NotTo(HaveOccurred())
					})
				})

				Context("and extra physical network interfaces exist", func() {
					BeforeEach(func() {
						stubInterfaces([][]string{[]string{"eth0", "aa:bb:cc", "physical"}, []string{"eth1", "aa:bb:dd", "physical"}})
						interfaceAddrsProvider.GetInterfaceAddresses = []boship.InterfaceAddress{
							boship.NewSimpleInterfaceAddress("eth0", "2.2.2.2"),
						}
					})

					It("succeeds", func() {
						err := boot.Run()
						Expect(err).NotTo(HaveOccurred())
					})
				})

				Context("and an extra virtual network interface exists", func() {
					BeforeEach(func() {
						stubInterfaces([][]string{[]string{"eth0", "aa:bb:cc", "physical"}, []string{"lo", "aa:bb:dd", "virtual"}})
						interfaceAddrsProvider.GetInterfaceAddresses = []boship.InterfaceAddress{
							boship.NewSimpleInterfaceAddress("eth0", "2.2.2.2"),
						}
					})

					It("succeeds", func() {
						err := boot.Run()
						Expect(err).NotTo(HaveOccurred())
					})
				})
			})

			Context("when two network configurations are provided", func() {
				BeforeEach(func() {
					settingsJSON = `{
					"networks": {
						"netA": {
							"default": ["dns", "gateway"],
							"ip": "2.2.2.2",
							"dns": [
								"8.8.8.8",
								"4.4.4.4"
							],
							"netmask": "255.255.255.0",
							"gateway": "2.2.2.0",
							"mac": "aa:bb:cc"
						},
						"netB": {
							"default": ["dns", "gateway"],
							"ip": "3.3.3.3",
							"dns": [
								"8.8.8.8",
								"4.4.4.4"
							],
							"netmask": "255.255.255.0",
							"gateway": "3.3.3.0",
							"mac": ""
						}
					}
				}`
				})

				Context("and a single physical network interface exists", func() {
					BeforeEach(func() {
						stubInterfaces([][]string{[]string{"eth0", "aa:bb:cc", "physical"}})
					})

					It("raises an error", func() {
						err := boot.Run()
						Expect(err).To(HaveOccurred())
						Expect(err.Error()).To(ContainSubstring("Number of network settings '2' is greater than the number of network devices '1"))
					})
				})

				Context("and two physical network interfaces with matching MAC addresses exist", func() {
					BeforeEach(func() {
						stubInterfaces([][]string{[]string{"eth0", "aa:bb:cc", "physical"}, []string{"eth1", "aa:bb:dd", "physical"}})
						interfaceAddrsProvider.GetInterfaceAddresses = []boship.InterfaceAddress{
							boship.NewSimpleInterfaceAddress("eth0", "2.2.2.2"),
							boship.NewSimpleInterfaceAddress("eth1", "3.3.3.3"),
						}
					})

					It("succeeds", func() {
						err := boot.Run()
						Expect(err).ToNot(HaveOccurred())
					})
				})
			})
		})
	})
}
var _ = Describe("MultiSettingsSource", func() {
	var (
		source boshsettings.Source
	)

	Context("when there are no sources", func() {
		It("returns an error when there are no sources", func() {
			_, err := NewMultiSettingsSource([]boshsettings.Source{}...)
			Expect(err).To(HaveOccurred())
			Expect(err.Error()).To(ContainSubstring("MultiSettingsSource requires to have at least one source"))
		})
	})

	Context("when there is at least one source", func() {
		var (
			source1 fakeinf.FakeSettingsSource
			source2 fakeinf.FakeSettingsSource
		)

		BeforeEach(func() {
			source1 = fakeinf.FakeSettingsSource{
				PublicKey:    "fake-public-key-1",
				PublicKeyErr: errors.New("fake-public-key-err-1"),

				SettingsValue: boshsettings.Settings{AgentID: "fake-settings-1"},
				SettingsErr:   errors.New("fake-settings-err-1"),
			}

			source2 = fakeinf.FakeSettingsSource{
				PublicKey:    "fake-public-key-2",
				PublicKeyErr: errors.New("fake-public-key-err-2"),