Centos

我想在 VirtualBox 的 CentOS 7 中使用 2 個 eth 設備設置一個 bond0 介面？

  • October 12, 2018

我想在 VirtualBox 中設置一個 CentOS 7.x 虛擬機，以便我可以嘗試綁定介面。如何設置此 VM，使其具有以下介面：

  • eth1（專用網路 - 192.168.56.101）
  • eth2（從屬bond0）
  • eth3（從屬bond0）
  • 債券 0（使用 LACP）

使用 Vagrant 來促進設置會很有幫助，因此更容易複製。

**注意：**我想手動進行設置，所以請展示一個禁用 NetworkManager 的範例。

設置流浪者

首先，您可以使用以下內容Vagrantfile來建構您的 VM：

$ cat Vagrantfile
Vagrant.configure("2") do |config|

 config.vm.box = "centos/7"
 config.vm.hostname="box-101"
 config.ssh.forward_x11 = true

 config.vm.network "private_network", ip: "192.168.56.101"
 config.vm.network "public_network", bridge: "en0: Wi-Fi (Wireless)", auto_config: false
 config.vm.network "public_network", bridge: "en0: Wi-Fi (Wireless)", auto_config: false

 config.vm.provider "virtualbox" do |vb|
   vb.memory = "2048"
 end

 config.vm.provision "shell", inline: <<-SHELL
   yum install -y git vim socat tcpdump wget sysstat
   yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
 SHELL
end

**注意：**我使用的 NICpublic_network是我的 Macbookbridge: "en0: Wi-Fi (Wireless)"設備。如果您在其他任何東西上執行此操作，則需要將其更改為執行 Vagrant/VirtualBox 的主機系統上的適當 NIC。

上面的文件包含 3 個 NIC，它們會在 VM 啟動時產生。啟動 VM 和 SSH 進入其中：

$ vagrant up
$ vagrant ssh

初始網路設置

如果我們查看生成的網路，我們將看到以下內容：

$ ip a l
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
   link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
   inet 127.0.0.1/8 scope host lo
      valid_lft forever preferred_lft forever
   inet6 ::1/128 scope host
      valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
   link/ether 52:54:00:c0:42:d5 brd ff:ff:ff:ff:ff:ff
   inet 10.0.2.15/24 brd 10.0.2.255 scope global noprefixroute dynamic eth0
      valid_lft 85127sec preferred_lft 85127sec
   inet6 fe80::5054:ff:fec0:42d5/64 scope link
      valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
   link/ether 08:00:27:ce:88:39 brd ff:ff:ff:ff:ff:ff
   inet 192.168.56.101/24 brd 192.168.56.255 scope global noprefixroute eth1
      valid_lft forever preferred_lft forever
   inet6 fe80::a00:27ff:fece:8839/64 scope link
      valid_lft forever preferred_lft forever
4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
   link/ether 08:00:27:d7:c2:ec brd ff:ff:ff:ff:ff:ff
   inet6 fe80::df68:9ee2:4b5:ad5f/64 scope link noprefixroute
      valid_lft forever preferred_lft forever
5: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
   link/ether 08:00:27:59:b0:69 brd ff:ff:ff:ff:ff:ff

以及對應的路由：

$ ip r
default via 10.0.2.2 dev eth0 proto dhcp metric 100
10.0.2.0/24 dev eth0 proto kernel scope link src 10.0.2.15 metric 100
192.168.56.0/24 dev eth1 proto kernel scope link src 192.168.56.101 metric 102

禁用網路管理器

對於這個 VM，我們將禁用 NetworkManager，這樣我們就可以手動配置綁定介面 + 從屬。

$ for i in NetworkManager-dispatcher NetworkManager NetworkManager-wait-online; do
   systemctl disable $i && systemctl stop $i
 done

確認 NM 現在已禁用：

$ systemctl list-unit-files |grep NetworkManager
NetworkManager-dispatcher.service             disabled
NetworkManager-wait-online.service            disabled
NetworkManager.service                        disabled

設置綁定介面

首先，我們將建構 3 個文件。1個用於bond0介面，1個用於我們將用作從屬的2個介面（eth2和eth3）。

ifcfg-債券0

$ cat /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
Type=Bond
NAME=bond0
BONDING_MASTER=yes
BOOTPROTO=none
ONBOOT=yes
IPADDR=192.168.1.232
PREFIX=24
GATEWAY=192.168.1.2
BONDING_OPTS="mode=4 miimon=100 lacp_rate=1"

注意： mode=4是（802.3ad）又名。LACP。miimon=100是 100 毫秒的檢查間隔，並且lacp_rate=1是來自合作夥伴的快速 TX。您可以通過此命令查看綁定模組接受的所有參數modinfo bonding。

eth2

$ cat /etc/sysconfig/network-scripts/ifcfg-eth2
DEVICE=eth2
TYPE=Ethernet
BOOTPROTO=none
ONBOOT=yes
NM_CONTROLLED=no
IPV6INIT=no
MASTER=bond0
SLAVE=yes

eth3

$ cat /etc/sysconfig/network-scripts/ifcfg-eth3
DEVICE=eth3
TYPE=Ethernet
BOOTPROTO=none
ONBOOT=yes
NM_CONTROLLED=no
IPV6INIT=no
MASTER=bond0
SLAVE=yes

**注意：**在上面我靜態地為bond0介面分配IP地址192.168.1.232和網關192.168.1.2。您需要將這些更改為適合您情況的內容。

啟動界面

到目前為止，啟動網路最簡單的方法是重新啟動網路服務：

$ systemctl restart network

如果我們看一下介面和路由：

$ ip a l
..
..
4: eth2: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000
   link/ether 08:00:27:d7:c2:ec brd ff:ff:ff:ff:ff:ff
5: eth3: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP group default qlen 1000
   link/ether 08:00:27:d7:c2:ec brd ff:ff:ff:ff:ff:ff
6: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
   link/ether 08:00:27:d7:c2:ec brd ff:ff:ff:ff:ff:ff
   inet 192.168.1.232/24 brd 192.168.1.255 scope global bond0
      valid_lft forever preferred_lft forever
   inet6 fe80::a00:27ff:fed7:c2ec/64 scope link
      valid_lft forever preferred_lft forever

$ ip r
default via 10.0.2.2 dev eth0
10.0.2.0/24 dev eth0 proto kernel scope link src 10.0.2.15
169.254.0.0/16 dev eth0 scope link metric 1002
169.254.0.0/16 dev eth1 scope link metric 1003
169.254.0.0/16 dev bond0 scope link metric 1006
192.168.1.0/24 dev bond0 proto kernel scope link src 192.168.1.232
192.168.56.0/24 dev eth1 proto kernel scope link src 192.168.56.101

粘合細節

我們還可以查看綁定介面的設備以獲取有關介面狀態的更多詳細資訊：

$ cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: IEEE 802.3ad Dynamic link aggregation
Transmit Hash Policy: layer2 (0)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

802.3ad info
LACP rate: fast
Min links: 0
Aggregator selection policy (ad_select): stable
System priority: 65535
System MAC address: 08:00:27:d7:c2:ec
Active Aggregator Info:
   Aggregator ID: 1
   Number of ports: 1
   Actor Key: 9
   Partner Key: 1
   Partner Mac Address: 00:00:00:00:00:00

Slave Interface: eth2
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 08:00:27:d7:c2:ec
Slave queue ID: 0
Aggregator ID: 1
Actor Churn State: none
Partner Churn State: churned
Actor Churned Count: 0
Partner Churned Count: 1
details actor lacp pdu:
   system priority: 65535
   system mac address: 08:00:27:d7:c2:ec
   port key: 9
   port priority: 255
   port number: 1
   port state: 207
details partner lacp pdu:
   system priority: 65535
   system mac address: 00:00:00:00:00:00
   oper key: 1
   port priority: 255
   port number: 1
   port state: 3

Slave Interface: eth3
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 08:00:27:59:b0:69
Slave queue ID: 0
Aggregator ID: 2
Actor Churn State: churned
Partner Churn State: churned
Actor Churned Count: 1
Partner Churned Count: 1
details actor lacp pdu:
   system priority: 65535
   system mac address: 08:00:27:d7:c2:ec
   port key: 9
   port priority: 255
   port number: 2
   port state: 199
details partner lacp pdu:
   system priority: 65535
   system mac address: 00:00:00:00:00:00
   oper key: 1
   port priority: 255
   port number: 1
   port state: 3

驗證外部連接

下面您可以看到對我在網路中的另一個盒子上執行的 bond0 的 IP 地址的 ping 輸出。一旦我們重新啟動network服務，我們可以看到它變得可以訪問：

$ ping 192.168.1.232
From 192.168.1.10 icmp_seq=7414 Destination Host Unreachable
From 192.168.1.10 icmp_seq=7415 Destination Host Unreachable
64 bytes from 192.168.1.232: icmp_seq=7416 ttl=64 time=886 ms
64 bytes from 192.168.1.232: icmp_seq=7417 ttl=64 time=3.58 ms
64 bytes from 192.168.1.232: icmp_seq=7418 ttl=64 time=3.52 ms
64 bytes from 192.168.1.232: icmp_seq=7419 ttl=64 time=3.46 ms
64 bytes from 192.168.1.232: icmp_seq=7420 ttl=64 time=3.15 ms
64 bytes from 192.168.1.232: icmp_seq=7421 ttl=64 time=3.50 ms

重啟提示

在 CentOS 7.x 上，bond0 介面在引導期間正常啟動似乎存在錯誤/問題。此問題的解決方法是將以下內容添加到：

$ echo "ifup bond0" >> /etc/rc.d/rc.local
$ chmod +x /etc/rc.d/rc.local

這將保證bond0在引導期間正確啟動介面。

參考

引用自：https://unix.stackexchange.com/questions/474973

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