Estou executando o Windows 10. Eu tenho o Hyper-V ativado. Eu criei três máquinas virtuais Hyper-V executando o Centos 7; especificamente:
Linux version 3.10.0-693.21.1.el7.x86_64
([email protected]) (gcc version 4.8.5 20150623 (Red Hat
4.8.5-16) (GCC) ) #1 SMP Wed Mar 7 19:03:37 UTC 2018
Eu tenho uma configuração de rede NAT. Todas as três VMs estão nessa rede. Quando eu ssh do host (minha máquina Windows 10) para uma das VMs, ela está PAINFALLY lenta.
Depois de emitir o comando ssh, espero mais de 15 segundos por um prompt de senha. Em seguida, insiro a senha e espero por mais de 15 segundos novamente:
[email protected]'s password:
Connection to 192.168.40.5 closed by remote host.
Connection to 192.168.40.5 closed.
Quando estabeleço a conexão ssh com a opção -vvv , é isso que vejo:
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug3: receive packet: type 6
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
...waits...
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 60
debug1: Server accepts key: pkalg rsa-sha2-512 blen 535
debug2: input_userauth_pk_ok: fp SHA256:3+l2I9j+Gv/Y2i3ksm00X3lIBjFEepj7uOCN4kQuy2A
debug3: sign_and_send_pubkey: RSA SHA256:3+l2I9j+Gv/Y2i3ksm00X3lIBjFEepj7uOCN4kQuy2A
debug3: send packet: type 50
debug3: receive packet: type 52
debug1: Authentication succeeded (publickey).
Authenticated to ***.***.***.7 ([***.***.***.7]:22).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug3: send packet: type 90
debug1: Requesting [email protected]
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
...waits...
debug3: receive packet: type 80
debug1: client_input_global_request: rtype [email protected] want_reply 0
debug3: receive packet: type 91
debug2: callback start
debug2: fd 3 setting TCP_NODELAY
debug3: ssh_packet_set_tos: set IP_TOS 0x10
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 1
debug3: send packet: type 98
debug1: Sending environment.
debug3: Ignored env SHELL
debug3: Ignored env TERM
debug3: Ignored env USER
debug3: Ignored env NAME
debug3: Ignored env LS_COLORS
debug3: Ignored env HOSTTYPE
debug3: Ignored env PATH
debug3: Ignored env PWD
debug1: Sending env LANG = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: send packet: type 98
debug3: Ignored env SHLVL
debug3: Ignored env HOME
debug3: Ignored env LOGNAME
debug3: Ignored env LESSOPEN
debug3: Ignored env LESSCLOSE
debug3: Ignored env _
debug2: channel 0: request shell confirm 1
debug3: send packet: type 98
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
...waits...
debug3: receive packet: type 99
debug2: channel_input_status_confirm: type 99 id 0
debug2: shell request accepted on channel 0
O sshd_config da minha máquina:
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
HostKey /etc/ssh/ssh_host_ed25519_key
SyslogFacility AUTHPRIV
AuthorizedKeysFile .ssh/authorized_keys
PasswordAuthentication yes
ChallengeResponseAuthentication no
GSSAPIAuthentication no
GSSAPICleanupCredentials no
UsePAM yes
X11Forwarding yes
AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE
AcceptEnv XMODIFIERS
Subsystem sftp /usr/libexec/openssh/sftp-server
- sinto a lentidão ao conectar-me a qualquer uma das VMs do CentOS
- A lentidão descrita ocorre ao conectar-se a partir do host (caixa do Windows 10) ou de uma das outras VMs do CentOS
- As VMs estão na mesma sub-rede
- As VMs recebem endereços IP estáticos
Eu quero resolver o problema da lentidão. Alguma dica ou idéia?
Adicionando detalhes de uma das VMs do CentOS:
ParentCheckpointId : a76e4644-66c3-4d8a-b252-1e671f2c3c7c
ParentCheckpointName : sbx-misc-app01 - (5/3/2018 - 12:20:00 AM)
VMName : sbx-misc-app01
VMId : a283e141-b32b-428d-8d3b-a64cf08b1ee8
CheckpointFileLocation : C:\Hyper-V\Virtual Machines
ConfigurationLocation : C:\Hyper-V\Virtual Machines
SmartPagingFileInUse : False
SmartPagingFilePath : C:\Hyper-V\Virtual Machines
SnapshotFileLocation : C:\Hyper-V\Virtual Machines
AutomaticStartAction : StartIfRunning
AutomaticStartDelay : 0
AutomaticStopAction : Save
AutomaticCriticalErrorAction : Pause
AutomaticCriticalErrorActionTimeout : 30
AutomaticCheckpointsEnabled : True
CPUUsage : 0
MemoryAssigned : 1612709888
MemoryDemand : 1031798784
MemoryStatus : OK
NumaAligned : False
NumaNodesCount : 1
NumaSocketCount : 1
Heartbeat : OkApplicationsUnknown
IntegrationServicesState :
IntegrationServicesVersion : 0.0
Uptime : 18:23:29.4550000
OperationalStatus : {Ok}
PrimaryOperationalStatus : Ok
SecondaryOperationalStatus :
StatusDescriptions : {Operating normally}
PrimaryStatusDescription : Operating normally
SecondaryStatusDescription :
Status : Operating normally
ReplicationHealth : NotApplicable
ReplicationMode : None
ReplicationState : Disabled
ResourceMeteringEnabled : False
CheckpointType : Standard
EnhancedSessionTransportType : VMBus
Groups : {}
Version : 8.3
VirtualMachineType : RealizedVirtualMachine
VirtualMachineSubType : Generation2
Notes :
State : Running
ComPort1 : VMComPort (Name = 'COM 1', VMName = 'sbx-misc-app01') [Id = 'Microsoft:A283E141-B32B-428D-8D3B-A64CF08B1EE8E3A359F-559A-4B6A-98A9-1690A6100ED7$switch_name = 'sbx-ext01'
$nat_name = 'net-sbx-ext01'
$nat_subnet_prefix_length = 24
$gateway_ip_address = '192.168.40.0'
New-VMSwitch -SwitchName $switch_name -SwitchType Internal
$interface_index = $(Get-NetAdapter -Name "*${switch_name}*").ifIndex
New-NetIPAddress '
-IPAddress 192.168.40.1 '
-PrefixLength 24 '
-InterfaceIndex $interface_index
New-NetNat -Name $nat_name '
-InternalIPInterfaceAddressPrefix $gateway_ip_address/$nat_subnet_prefix_length
', VMId =
'a283e141-b32b-428d-8d3b-a64cf08b1ee8']
ComPort2 : VMComPort (Name = 'COM 2', VMName = 'sbx-misc-app01') [Id = 'Microsoft:A283E141-B32B-428D-8D3B-A64CF08B1EE8E3A359F-559A-4B6A-98A9-1690A6100ED7', VMId =
'a283e141-b32b-428d-8d3b-a64cf08b1ee8']
DVDDrives : {DVD Drive on SCSI controller number 0 at location 1}
FibreChannelHostBusAdapters : {}
FloppyDrive :
HardDrives : {Hard Drive on SCSI controller number 0 at location 0}
RemoteFxAdapter :
VMIntegrationService : {Guest Service Interface, Heartbeat, Key-Value Pair Exchange, Shutdown...}
DynamicMemoryEnabled : True
MemoryMaximum : 8589934592
MemoryMinimum : 536870912
MemoryStartup : 8589934592
ProcessorCount : 2
BatteryPassthroughEnabled : True
Generation : 2
IsClustered : False
ParentSnapshotId : a76e4644-66c3-4d8a-b252-1e671f2c3c7c
ParentSnapshotName : sbx-misc-app01 - (5/3/2018 - 12:20:00 AM)
Path : C:\Hyper-V\Virtual Machines
SizeOfSystemFiles : 69632
GuestControlledCacheTypes : False
LowMemoryMappedIoSpace : 134217728
HighMemoryMappedIoSpace : 536870912
LockOnDisconnect : Off
CreationTime : 5/2/2018 10:23:06 PM
Id : a283e141-b32b-428d-8d3b-a64cf08b1ee8
Name : sbx-misc-app01
NetworkAdapters : {Network Adapter}
CimSession : CimSession: .
ComputerName : Thinger
IsDeleted : False
Aqui está o código de configuração da rede ...
[email protected]'s password:
Connection to 192.168.40.5 closed by remote host.
Connection to 192.168.40.5 closed.