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nmcli-bonding
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nmcli-bonding.md

CentOS7 で nmcli を使って bonding 設定を行う。

前提

  • ネットワークのインターフェースが2つある
  • 両方とも switch に接続されている
  • 片方だけIPアドレスが設定してあり有効になっている

↓こんな環境

$ nmcli c
NAME      UUID                                  TYPE            DEVICE
enp8s0f0  86b340dd-08f8-4067-95da-64e5d065c9e2  802-3-ethernet  enp8s0f0
enp8s0f1  5ddd53ce-04fc-4def-8c28-142c5c1e3f4a  802-3-ethernet  --

$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
    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: enp8s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether a8:0c:0d:xx:xx:xxe brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.100/24 brd 192.168.0.255 scope global enp8s0f0
       valid_lft forever preferred_lft forever
    inet6 fe80::aa0c:dff:xxxx:xxxx/64 scope link
       valid_lft forever preferred_lft forever
3: enp8s0f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether a8:0c:0d:xx:xx:xx brd ff:ff:ff:ff:ff:ff

bonding デバイスを追加する

$ sudo nmcli connection add type bond autoconnect no con-name jamesbond ifname jamesbond mode active-backup
Connection 'jamesbond' (3f972a86-feaf-4fd3-89c0-0b781d76aa18) successfully added.

$ nmcli c
NAME       UUID                                  TYPE            DEVICE
enp8s0f0   86b340dd-08f8-4067-95da-64e5d065c9e2  802-3-ethernet  enp8s0f0
jamesbond  3f972a86-feaf-4fd3-89c0-0b781d76aa18  bond            --
enp8s0f1   5ddd53ce-04fc-4def-8c28-142c5c1e3f4a  802-3-ethernet  --

slave を追加する

ひとまず使ってないインターフェースを slave として追加

$ sudo nmcli connection add type bond-slave autoconnect no ifname enp8s0f1 master jamesbond
Connection 'bond-slave-enp8s0f1' (30170a37-4157-44be-99dd-9e99442839ff) successfully added.

$ nmcli c
NAME                 UUID                                  TYPE            DEVICE
jamesbond            3f972a86-feaf-4fd3-89c0-0b781d76aa18  bond            --   
enp8s0f0             86b340dd-08f8-4067-95da-64e5d065c9e2  802-3-ethernet  enp8s0f0
bond-slave-enp8s0f1  30170a37-4157-44be-99dd-9e99442839ff  802-3-ethernet  --   
enp8s0f1             5ddd53ce-04fc-4def-8c28-142c5c1e3f4a  802-3-ethernet  --

connection.* を確認すると jamesbond の slave だということがわかります

$ nmcli -f connection c s bond-slave-enp8s0f1
connection.id:                          bond-slave-enp8s0f1
connection.uuid:                        30170a37-4157-44be-99dd-9e99442839ff
connection.interface-name:              enp8s0f1
connection.type:                        802-3-ethernet
connection.autoconnect:                 no
connection.timestamp:                   0
connection.read-only:                   no
connection.permissions:
connection.zone:                        --
connection.master:                      jamesbond
connection.slave-type:                  bond
connection.secondaries:
connection.gateway-ping-timeout:        0

autoconnect が有効で DHCP サーバーがいたりするとこの時点でIPアドレスが振られちゃってます

bonding インターフェースにIPアドレスなどを設定する

設定前

$ nmcli -f ipv4 c s jamesbond
ipv4.method:                            auto
ipv4.dns:
ipv4.dns-search:
ipv4.addresses:
ipv4.routes:
ipv4.ignore-auto-routes:                no
ipv4.ignore-auto-dns:                   no
ipv4.dhcp-client-id:                    --
ipv4.dhcp-send-hostname:                yes
ipv4.dhcp-hostname:                     --
ipv4.never-default:                     no
ipv4.may-fail:                          yes

設定

$ sudo nmcli c e jamesbond
nmcli> set ipv4.method manual
nmcli> set ipv4.dns 192.168.0.5,192.168.0.6
nmcli> set ipv4.dns-search example.com
nmcli> set ipv4.addresses 192.168.0.100/24 192.168.0.1
nmcli> p ipv4
['ipv4' setting values]
ipv4.method:                            manual
ipv4.dns:                               192.168.0.5, 192.168.0.6
ipv4.dns-search:                        example.com
ipv4.addresses:                         { ip = 192.168.0.100/24, gw = 192.168.0.1 }
ipv4.routes:
ipv4.ignore-auto-routes:                no
ipv4.ignore-auto-dns:                   no
ipv4.dhcp-client-id:                    --
ipv4.dhcp-send-hostname:                yes
ipv4.dhcp-hostname:                     --
ipv4.never-default:                     no
ipv4.may-fail:                          yes
nmcli> verify
Verify connection: OK
nmcli> save
Connection 'jamesbond' (3f972a86-feaf-4fd3-89c0-0b781d76aa18) successfully updated.
nmcli> quit

restart で入れ替わるように autoconnect を調整する

sudo sed -i -e 's/ONBOOT=no/ONBOOT=yes/' /etc/sysconfig/network-scripts/ifcfg-bond-slave-enp8s0f1
sudo sed -i -e 's/ONBOOT=no/ONBOOT=yes/' /etc/sysconfig/network-scripts/ifcfg-jamesbond
sudo nmcli c m enp8s0f0 connection.autoconnect no

restart

$ sudo service network restart; sudo nmcli c up bond-slave-enp8s0f1

1行で入力しないと slave が up してくれなくてネットワークアクセスできなくなっちゃいます。 もちろん、コンソールからアクセスしてれば分けてももーまんたい。 OS 再起動すれば up するんですけど、なにが足りないんだろうか。

もう一方のインターフェースも bonding に追加

$ sudo nmcli connection add type bond-slave ifname enp8s0f0 master jamesbond

今回は autoconnect の指定はなし (default yes) で ok

$ nmcli c
NAME                 UUID                                  TYPE            DEVICE
jamesbond            0f731c67-075e-447a-8ddb-c7a4b9dd0d81  bond            jamesbond
bond-slave-enp8s0f1  9bb37dd8-24ed-4335-9e5e-b3a1da8fa51c  802-3-ethernet  enp8s0f1
enp8s0f1             5ddd53ce-04fc-4def-8c28-142c5c1e3f4a  802-3-ethernet  --   
bond-slave-enp8s0f0  bdb5239b-a868-40e2-8ff7-81be4313efac  802-3-ethernet  enp8s0f0
enp8s0f0             86b340dd-08f8-4067-95da-64e5d065c9e2  802-3-ethernet  --

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

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: enp8s0f1
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: enp8s0f1
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: a8:0c:0d:xx:xx:xx
Slave queue ID: 0

Slave Interface: enp8s0f0
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: a8:0c:0d:xx:xx:xx
Slave queue ID: 0

ついでなので slave を切り替えてみる

$ sudo ifenslave -c jamesbond enp8s0f0
$ grep 'Active Slave:' /proc/net/bonding/jamesbond
Currently Active Slave: enp8s0f0
$ sudo ifenslave -c jamesbond enp8s0f1
$ grep 'Active Slave:' /proc/net/bonding/jamesbond
Currently Active Slave: enp8s0f1

bonding を解除する

enp8s0f1 が Active Slave なので enp8s0f0 を外して設定する

$ nmcli c
NAME                 UUID                                  TYPE            DEVICE
jamesbond            0f731c67-075e-447a-8ddb-c7a4b9dd0d81  bond            jamesbond
bond-slave-enp8s0f1  9bb37dd8-24ed-4335-9e5e-b3a1da8fa51c  802-3-ethernet  enp8s0f1
enp8s0f1             5ddd53ce-04fc-4def-8c28-142c5c1e3f4a  802-3-ethernet  --   
bond-slave-enp8s0f0  bdb5239b-a868-40e2-8ff7-81be4313efac  802-3-ethernet  enp8s0f0
enp8s0f0             86b340dd-08f8-4067-95da-64e5d065c9e2  802-3-ethernet  --

$ sudo nmcli c del bond-slave-enp8s0f0

$ nmcli c
NAME                 UUID                                  TYPE            DEVICE
jamesbond            0f731c67-075e-447a-8ddb-c7a4b9dd0d81  bond            jamesbond
bond-slave-enp8s0f1  9bb37dd8-24ed-4335-9e5e-b3a1da8fa51c  802-3-ethernet  enp8s0f1
enp8s0f1             5ddd53ce-04fc-4def-8c28-142c5c1e3f4a  802-3-ethernet  --   
enp8s0f0             86b340dd-08f8-4067-95da-64e5d065c9e2  802-3-ethernet  --

bond-slave-enp8s0f0 が消えたので enp8s0f0 を再設定 だけど、前のがの残ってるから今回は autoconnect をいじるだけ

$ nmcli -f connection,ipv4 c s enp8s0f0
connection.id:                          enp8s0f0
connection.uuid:                        86b340dd-08f8-4067-95da-64e5d065c9e2
connection.interface-name:              --
connection.type:                        802-3-ethernet
connection.autoconnect:                 no
connection.timestamp:                   1407189160
connection.read-only:                   no
connection.permissions:
connection.zone:                        --
connection.master:                      --
connection.slave-type:                  --
connection.secondaries:
connection.gateway-ping-timeout:        0
ipv4.method:                            manual
ipv4.dns:                               192.168.0.5, 192.168.0.6
ipv4.dns-search:                        example.com
ipv4.addresses:                         { ip = 192.168.0.100/24, gw = 192.168.0.1 }
ipv4.routes:
ipv4.ignore-auto-routes:                no
ipv4.ignore-auto-dns:                   no
ipv4.dhcp-client-id:                    --
ipv4.dhcp-send-hostname:                yes
ipv4.dhcp-hostname:                     --
ipv4.never-default:                     no
ipv4.may-fail:                          yes

nmcli connection edit enp8s0f0 で set connection.autoconnect yes して save すると、すぐ有効になっちゃうから modify コマンドを使うこと。

bonding インターフェースが自動起動しないようにして、enp8s0f0 が起動するようにする

$ sudo nmcli c m jamesbond connection.autoconnect no
$ sudo nmcli c m bond-slave-enp8s0f1 connection.autoconnect no
$ sudo nmcli c m enp8s0f0 connection.autoconnect yes

restart network service

$ sudo service network restart

bonding の設定を掃除

$ sudo nmcli c del bond-slave-enp8s0f1
$ sudo nmcli c del jamesbond

$ nmcli c
NAME      UUID                                  TYPE            DEVICE
enp8s0f1  5ddd53ce-04fc-4def-8c28-142c5c1e3f4a  802-3-ethernet  --
enp8s0f0  86b340dd-08f8-4067-95da-64e5d065c9e2  802-3-ethernet  enp8s0f0

元に戻った。めでたしめでたし。

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