Esse problema apareceu após a instalação do CentOS. O servidor fica indisponível completamente por meio do protocolo ssh ou smb. Acontece aleatoriamente e não há regularidade exata. Isso pode acontecer a qualquer momento e não depende do carregamento do servidor ou da versão do kernel (tentou diferente no último mês). Então, depois da minha primeira investigação, descobri que está relacionado à rede. Quando eu pude pegar esse "apagão", descobri que eu não conseguia fazer o ping do servidor, nem da rede do escritório para o servidor, nem do servidor para qualquer máquina no escritório, mas podia fazer ping no host local. Além disso, o LED verde da rede na parte de trás da placa-mãe estava aceso constantemente sem piscar e o LED laranja não acendia nada. Então, quando eu fiz systemctl restart network localmente no servidor, tudo ficou bem.
A última vez que aconteceu foi no dia 14 de outubro de 2016 às 16:05 (por MSK TZ)
Checked dmesq
[2016-11-13 01:00:32] md: using 128k window, over a total of 487313408k.
[2016-11-13 02:54:57] md: md127: data-check done.
[2016-11-13 04:52:32] md: md1: data-check done.
[2016-11-14 16:36:57] usb 4-2: new low-speed USB device number 2 using uhci_hcd
[2016-11-14 16:36:58] usb 4-2: New USB device found, idVendor=1a2c, idProduct=0c23
[2016-11-14 16:36:58] usb 4-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[2016-11-14 16:36:58] usb 4-2: Product: USB Keyboard
[2016-11-14 16:36:58] usb 4-2: Manufacturer: USB
[2016-11-14 16:36:58] input: USB USB Keyboard as /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/input/input15
[2016-11-14 16:36:58] hid-generic 0003:1A2C:0C23.0001: input,hidraw0: USB HID v1.10 Keyboard [USB USB Keyboard] on usb-0000:00:1a.1-2/input0
[2016-11-14 16:36:58] input: USB USB Keyboard as /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.1/input/input16
[2016-11-14 16:36:58] hid-generic 0003:1A2C:0C23.0002: input,hidraw1: USB HID v1.10 Device [USB USB Keyboard] on usb-0000:00:1a.1-2/input1
[root@london stats]#
Como podemos ver - nada
Verificado / var / log / messages
Nov 14 15:01:01 london systemd: Removed slice user-0.slice.
Nov 14 15:01:01 london systemd: Stopping user-0.slice.
Nov 14 16:01:01 london systemd: Created slice user-0.slice.
Nov 14 16:01:01 london systemd: Starting user-0.slice.
Nov 14 16:01:01 london systemd: Started Session 171 of user root.
Nov 14 16:01:01 london systemd: Starting Session 171 of user root.
Nov 14 16:01:01 london systemd: Removed slice user-0.slice.
Nov 14 16:01:01 london systemd: Stopping user-0.slice.
Nov 14 16:05:24 london smbd[6249]: [2016/11/14 16:05:24.098079, 0] ../source3/smbd/oplock.c:700(oplock_timeout_handler)
Nov 14 16:05:24 london smbd[6249]: Oplock break failed for file Z_Drive/BackUp/...... DC.lnk -- replying anyway
Nov 14 16:05:54 london smbd[6249]: [2016/11/14 16:05:54.133612, 0] ../source3/smbd/oplock.c:700(oplock_timeout_handler)
Nov 14 16:05:54 london smbd[6249]: Oplock break failed for file Z_Drive/BackUp/..... X8.lnk -- replying anyway
.
.
.
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Nov 14 16:36:57 london kernel: usb 4-2: new low-speed USB device number 2 using uhci_hcd
Nov 14 16:36:57 london kernel: usb 4-2: New USB device found, idVendor=1a2c, idProduct=0c23
Nov 14 16:36:57 london kernel: usb 4-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Nov 14 16:36:57 london kernel: usb 4-2: Product: USB Keyboard
Nov 14 16:36:57 london kernel: usb 4-2: Manufacturer: USB
Como podemos ver, não há nada aqui também. Existem muitas mensagens com falha de smbd demon sobre conexão interrompida. Mas não é apropriado para nós, eu assumo.
Systemctl nos disse que rede é OK também. Não existem entradas para o 14 de Out.
● network.service - LSB: Bring up/down networking
Loaded: loaded (/etc/rc.d/init.d/network)
Active: active (exited) since Tue 2016-11-08 01:53:35 MSK; 6 days ago
Docs: man:systemd-sysv-generator(8)
Process: 925 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=0/SUCCESS)
Nov 08 01:53:32 london.local systemd[1]: Starting LSB: Bring up/down networking...
Nov 08 01:53:32 london.local network[925]: Bringing up loopback interface: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
Nov 08 01:53:33 london.local network[925]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
Nov 08 01:53:33 london.local network[925]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
Nov 08 01:53:33 london.local network[925]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
Nov 08 01:53:33 london.local network[925]: [ OK ]
Nov 08 01:53:35 london.local network[925]: Bringing up interface enp2s0: [ OK ]
Nov 08 01:53:35 london.local systemd[1]: Started LSB: Bring up/down networking.
Aqui dados adicionais para investigação
Informações do kernel
3.10.0-327.36.3.el7.x86_64
Informações do sistema operacional
CentOS Linux release 7.2.1511 (Core)
Informações de rede
dmesg | grep -i 'Ethernet'
[root@london /]# dmesg | grep -i 'Ethernet'
[ 1.327135] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
[ 1.327619] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
[root@london /]#
modinfo r8169
[root@london /]# modinfo r8169
filename: /lib/modules/3.10.0-327.36.3.el7.x86_64/kernel/drivers/net/ethernet/realtek/r8169.ko
firmware: rtl_nic/rtl8107e-2.fw
firmware: rtl_nic/rtl8107e-1.fw
firmware: rtl_nic/rtl8168h-2.fw
firmware: rtl_nic/rtl8168h-1.fw
firmware: rtl_nic/rtl8168g-3.fw
firmware: rtl_nic/rtl8168g-2.fw
firmware: rtl_nic/rtl8106e-2.fw
firmware: rtl_nic/rtl8106e-1.fw
firmware: rtl_nic/rtl8411-2.fw
firmware: rtl_nic/rtl8411-1.fw
firmware: rtl_nic/rtl8402-1.fw
firmware: rtl_nic/rtl8168f-2.fw
firmware: rtl_nic/rtl8168f-1.fw
firmware: rtl_nic/rtl8105e-1.fw
firmware: rtl_nic/rtl8168e-3.fw
firmware: rtl_nic/rtl8168e-2.fw
firmware: rtl_nic/rtl8168e-1.fw
firmware: rtl_nic/rtl8168d-2.fw
firmware: rtl_nic/rtl8168d-1.fw
version: 2.3LK-NAPI
license: GPL
description: RealTek RTL-8169 Gigabit Ethernet driver
author: Realtek and the Linux r8169 crew <[email protected]>
rhelversion: 7.2
srcversion: 17C11305BF371984CB1A920
alias: pci:v00000001d00008168sv*sd00002410bc*sc*i*
alias: pci:v00001737d00001032sv*sd00000024bc*sc*i*
alias: pci:v000016ECd00000116sv*sd*bc*sc*i*
alias: pci:v00001259d0000C107sv*sd*bc*sc*i*
alias: pci:v00001186d00004302sv*sd*bc*sc*i*
alias: pci:v00001186d00004300sv*sd*bc*sc*i*
alias: pci:v00001186d00004300sv00001186sd00004B10bc*sc*i*
alias: pci:v000010ECd00008169sv*sd*bc*sc*i*
alias: pci:v000010ECd00008168sv*sd*bc*sc*i*
alias: pci:v000010ECd00008167sv*sd*bc*sc*i*
alias: pci:v000010ECd00008136sv*sd*bc*sc*i*
alias: pci:v000010ECd00008129sv*sd*bc*sc*i*
depends: mii
intree: Y
vermagic: 3.10.0-327.36.3.el7.x86_64 SMP mod_unload modversions
signer: CentOS Linux kernel signing key
sig_key: DD:8A:C3:DE:FE:A6:07:A6:13:C9:58:35:D0:37:19:40:E7:75:43:CF
sig_hashalgo: sha256
parm: use_dac:Enable PCI DAC. Unsafe on 32 bit PCI slot. (int)
parm: debug:Debug verbosity level (0=none, ..., 16=all) (int)
[root@london /]#
lspci | grep net
[root@london /]# lspci | grep net
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8110SC/8169SC Gigabit Ethernet (rev 10)
02:01.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8110SC/8169SC Gigabit Ethernet (rev 10)
[root@london /]#
lshw -class net
[root@london av]# lshw -class net
*-network:0 UNCLAIMED
description: Ethernet controller
product: RTL-8110SC/8169SC Gigabit Ethernet
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
version: 10
width: 32 bits
clock: 66MHz
capabilities: pm cap_list
configuration: latency=32 maxlatency=64 mingnt=32
resources: ioport:ce00(size=256) memory:fddff000-fddff0ff memory:fdd00000-fdd1ffff
*-network:1 UNCLAIMED
description: Ethernet controller
product: RTL-8110SC/8169SC Gigabit Ethernet
vendor: Realtek Semiconductor Co., Ltd.
physical id: 1
bus info: pci@0000:02:01.0
version: 10
width: 32 bits
clock: 66MHz
capabilities: pm cap_list
configuration: latency=64 maxlatency=64 mingnt=32
resources: ioport:cc00(size=256) memory:fddfe000-fddfe0ff memory:fdd20000-fdd3ffff
*-network:2
description: Ethernet interface
product: SMC2-1211TX
vendor: Accton Technology Corporation
physical id: 3
bus info: pci@0000:02:03.0
logical name: enp2s3
version: 10
serial: 00:10:b5:c0:43:bb
size: 100Mbit/s
capacity: 100Mbit/s
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=8139too driverversion=0.9.28 duplex=full ip=192.168.1.4 latency=32 link=yes maxlatency=64 mingnt=32 multicast=yes port=MII speed=100Mbit/s
resources: irq:22 ioport:ca00(size=256) memory:fddfc000-fddfc0ff
[root@london av]#
ethtool enp2s0
[root@london /]# ethtool enp2s0
Settings for enp2s0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Advertised pause frame use: Symmetric Receive-only
Advertised auto-negotiation: Yes
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Link partner advertised pause frame use: No
Link partner advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000033 (51)
drv probe ifdown ifup
Link detected: yes
[root@london /]#
Configuração da interface
root@london stats]# cat /etc/sysconfig/network-scripts/ifcfg-enp2s0
TYPE="Ethernet"
BOOTPROTO="none"
IPADDR="192.168.1.4"
NETMASK="255.255.255.0"
GATEWAY="192.168.1.101"
DNS1="192.168.1.101"
DNS2="8.8.8.8"
IPV4_FAILURE_FATAL="no"
NAME="enp2s0"
UUID="d9ca6b87-aa3c-4581-bfa8-4fcbebd78e06"
DEVICE="enp2s0"
ONBOOT="yes"
NM_CONTROLLED="no"
[root@london stats]#
A função de servidor é compartilhamentos de samba Sem IPTables, o SELinux está desativado.
Então as perguntas são:
Caso seja necessária informação adicional, por favor diga-me. Todos os conselhos são bem vindos. Por favor ajude. Desde já, obrigado.