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bondingドライバとipv6モジュールが関係していた件

Posted at 2014-05-12

物理でLinuxを構築する機会があり、bondingをセットアップでハマったので、その時の
ワークアラウンド。

環境

CentOS release 6.4

bondingインターフェース作成

作成スクリプトをgitからclone

$ git init
$ git export all_proxy=http://userid:password@hogehoge:8080
$ git clone https://gist.github.com/3f1d26dbb4910d5a7392.git

スクリプト実行

$ cd 3f1d26dbb4910d5a7392/

$ sudo bash ./create_bondif.sh
cp -ip /etc/modprobe.d/bonding.conf /tmp/bonding.conf.20140512-095355
cp /dev/null /etc/modprobe.d/bonding.conf
cp -ip  /etc/sysconfig/network-scripts/ifcfg-bond0 /etc/sysconfig/network-scripts/_ifcfg-bond0.20140512-095355
cp /dev/null /etc/sysconfig/network-scripts/ifcfg-bond0
create /etc/sysconfig/network-scripts/ifcfg-bond0
ifup bond0
cp -ip  /etc/sysconfig/network-scripts/ifcfg-bond1 /etc/sysconfig/network-scripts/_ifcfg-bond1.20140512-095355
cp /dev/null /etc/sysconfig/network-scripts/ifcfg-bond1
create /etc/sysconfig/network-scripts/ifcfg-bond1
ifup bond1
cp -ip  /etc/sysconfig/network-scripts/ifcfg-bond2 /etc/sysconfig/network-scripts/_ifcfg-bond2.20140512-095355
cp /dev/null /etc/sysconfig/network-scripts/ifcfg-bond2
create /etc/sysconfig/network-scripts/ifcfg-bond2
ifup bond2
create /etc/modprobe.d/bonding.conf

確認作業

bondインターフェースが起動している。

$ ifconfig
bond0     Link encap:Ethernet  HWaddr 00:00:00:00:00:00
          UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

bond1     Link encap:Ethernet  HWaddr 00:00:00:00:00:00
          UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

bond2     Link encap:Ethernet  HWaddr 00:00:00:00:00:00
          UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

eth0      Link encap:Ethernet  HWaddr 08:00:27:00:E9:DF
          inet addr:10.0.2.15  Bcast:10.0.2.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:47 errors:0 dropped:0 overruns:0 frame:0
          TX packets:37 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:7099 (6.9 KiB)  TX bytes:5371 (5.2 KiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

念のためOSを再起動

$ sudo shutdown -r now

再度確認
・・・なぜかない。

$ ifconfig
eth0      Link encap:Ethernet  HWaddr 08:00:27:00:E9:DF
          inet addr:10.0.2.15  Bcast:10.0.2.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:47 errors:0 dropped:0 overruns:0 frame:0
          TX packets:37 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:7099 (6.9 KiB)  TX bytes:5371 (5.2 KiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

調査

手動で起動しようとしても、エラーになる。

$ sudo ifup bond0
WARNING: All config files need .conf: /etc/modprobe.d/net-pf-10, it will be ignored in a future release.
FATAL: Error inserting bonding (/lib/modules/2.6.32-358.el6.x86_64/kernel/drivers/net/bonding/bonding.ko): Unknown symbol in module, or unknown parameter (see dmesg)
./network-functions: line 419: /sys/class/net/bonding_masters: No such file or directory
./network-functions: line 425: /sys/class/net/bond0/bonding/slaves: No such file or directory
./network-functions: line 425: [: too many arguments
WARNING: All config files need .conf: /etc/modprobe.d/net-pf-10, it will be ignored in a future release.
WARNING: All config files need .conf: /etc/modprobe.d/net-pf-10, it will be ignored in a future release.
FATAL: Error inserting bonding (/lib/modules/2.6.32-358.el6.x86_64/kernel/drivers/net/bonding/bonding.ko): Unknown symbol in module, or unknown parameter (see dmesg)
./network-functions: line 419: /sys/class/net/bonding_masters: No such file or directory
./network-functions: line 425: /sys/class/net/bond0/bonding/slaves: No such file or directory
./network-functions: line 425: [: too many arguments
WARNING: All config files need .conf: /etc/modprobe.d/net-pf-10, it will be ignored in a future release.
bonding device bond0 does not seem to be present, delaying initialization.

テスト環境で再度作り直し、bondが起動した状態でbonding.koの依存関係を見てみる。


$ cat /lib/modules/$(uname -r)/modules.dep | grep bonding.ko
kernel/drivers/net/bonding/bonding.ko: kernel/net/ipv6/ipv6.ko kernel/net/8021q/8021q.ko kernel/net/802/garp.ko kernel/net/802/stp.ko kernel/net/llc/llc.ko

ipv6のモジュールが関係しているみたい。
モジュールの依存関係でbondingドライバのdependsを見ると、確かにipv6が含まれていた。

$ modinfo bonding | grep depends
depends:        8021q,ipv6

原因は、VMの設定でいつも実施していたipv6モジュールをインストールしない以下の設定が原因だった。

$ cat /etc/modprobe.d/disable-ipv6.conf
install ipv6 /bin/true

これを削除して、rebootするとbondingインターフェースが起動していた。

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