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VagrantでマルチVM

vegrantで複数VMを立ち上げてお互いに通信させる方法をメモしておきます。

環境(前提条件)

◆以下の手順に沿って単体のVMは構築済みです。今回はこちらで構築したCentOS6.7のVM(ゲストOS)を複数立ち上げます。
saosao-0706.hatenablog.com
◆Vagrantfileの格納されているディレクトリ(ホストOS)の場所は「/root/vagrant/centos67」です。

Vagrantfile変更

# vi /root/vagrant/centos67/Vagrantfile
              ・
              ・
  config.vm.define :node1 do |node1|
    node1.vm.network "private_network", ip: "192.168.33.10"
  end

  config.vm.define :node2 do |node2|
    node2.vm.network "private_network", ip: "192.168.33.11"
  end

上記の4行を追加してnode単位に内部ネットワーク用のIPアドレスを付与するようにします。

一旦構築したVMを削除

# cd /root/vagrant/centos67/
# vagrant destroy

VM(ゲストOS)の起動

# cd /root/vagrant/centos67/
# vagrant up
Bringing machine 'node1' up with 'virtualbox' provider...
Bringing machine 'node2' up with 'virtualbox' provider...
==> node1: Importing base box 'centos67'...
==> node1: Matching MAC address for NAT networking...
==> node1: Setting the name of the VM: centos67_node1_1462177540423_22245
==> node1: Fixed port collision for 22 => 2222. Now on port 2202.
==> node1: Clearing any previously set network interfaces...
==> node1: Preparing network interfaces based on configuration...
    node1: Adapter 1: nat
    node1: Adapter 2: hostonly
==> node1: Forwarding ports...
    node1: 22 (guest) => 2202 (host) (adapter 1)
==> node1: Booting VM...
==> node1: Waiting for machine to boot. This may take a few minutes...
    node1: SSH address: 127.0.0.1:2202
    node1: SSH username: vagrant
    node1: SSH auth method: private key
    node1: Warning: Remote connection disconnect. Retrying...
    node1:
    node1: Vagrant insecure key detected. Vagrant will automatically replace
    node1: this with a newly generated keypair for better security.
    node1:
    node1: Inserting generated public key within guest...
    node1: Removing insecure key from the guest if it's present...
    node1: Key inserted! Disconnecting and reconnecting using new SSH key...
==> node1: Machine booted and ready!
==> node1: Checking for guest additions in VM...
    node1: The guest additions on this VM do not match the installed version of
    node1: VirtualBox! In most cases this is fine, but in rare cases it can
    node1: prevent things such as shared folders from working properly. If you see
    node1: shared folder errors, please make sure the guest additions within the
    node1: virtual machine match the version of VirtualBox you have installed on
    node1: your host and reload your VM.
    node1:
    node1: Guest Additions Version: 4.3.30
    node1: VirtualBox Version: 5.0
==> node1: Configuring and enabling network interfaces...
==> node1: Mounting shared folders...
    node1: /vagrant => /root/vagrant/centos67
==> node2: Importing base box 'centos67'...
==> node2: Matching MAC address for NAT networking...
==> node2: Setting the name of the VM: centos67_node2_1462177592736_21927
==> node2: Fixed port collision for 22 => 2222. Now on port 2203.
==> node2: Clearing any previously set network interfaces...
==> node2: Preparing network interfaces based on configuration...
    node2: Adapter 1: nat
    node2: Adapter 2: hostonly
==> node2: Forwarding ports...
    node2: 22 (guest) => 2203 (host) (adapter 1)
==> node2: Booting VM...
==> node2: Waiting for machine to boot. This may take a few minutes...
    node2: SSH address: 127.0.0.1:2203
    node2: SSH username: vagrant
    node2: SSH auth method: private key
    node2: Warning: Remote connection disconnect. Retrying...
    node2:
    node2: Vagrant insecure key detected. Vagrant will automatically replace
    node2: this with a newly generated keypair for better security.
    node2:
    node2: Inserting generated public key within guest...
    node2: Removing insecure key from the guest if it's present...
    node2: Key inserted! Disconnecting and reconnecting using new SSH key...
==> node2: Machine booted and ready!
==> node2: Checking for guest additions in VM...
    node2: The guest additions on this VM do not match the installed version of
    node2: VirtualBox! In most cases this is fine, but in rare cases it can
    node2: prevent things such as shared folders from working properly. If you see
    node2: shared folder errors, please make sure the guest additions within the
    node2: virtual machine match the version of VirtualBox you have installed on
    node2: your host and reload your VM.
    node2:
    node2: Guest Additions Version: 4.3.30
    node2: VirtualBox Version: 5.0
==> node2: Configuring and enabling network interfaces...
==> node2: Mounting shared folders...
    node2: /vagrant => /root/vagrant/centos67

2つのVMが起動しています。

ホストOSからPINGを打ってみる

# ping 192.168.33.10
PING 192.168.33.10 (192.168.33.10) 56(84) bytes of data.
64 bytes from 192.168.33.10: icmp_seq=1 ttl=64 time=8.46 ms
64 bytes from 192.168.33.10: icmp_seq=2 ttl=64 time=0.184 ms
64 bytes from 192.168.33.10: icmp_seq=3 ttl=64 time=0.158 ms
64 bytes from 192.168.33.10: icmp_seq=4 ttl=64 time=0.298 ms
^C
--- 192.168.33.10 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3312ms
rtt min/avg/max/mdev = 0.158/2.277/8.469/3.575 ms


# ping 192.168.33.11
PING 192.168.33.11 (192.168.33.11) 56(84) bytes of data.
64 bytes from 192.168.33.11: icmp_seq=1 ttl=64 time=0.673 ms
64 bytes from 192.168.33.11: icmp_seq=2 ttl=64 time=0.197 ms
64 bytes from 192.168.33.11: icmp_seq=3 ttl=64 time=0.235 ms
64 bytes from 192.168.33.11: icmp_seq=4 ttl=64 time=0.231 ms
^C
--- 192.168.33.11 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3981ms
rtt min/avg/max/mdev = 0.197/0.334/0.673/0.196 ms

問題なさそうです。

SSHの設定

ホストOSからゲストOSにSSHログインする際にオプションを付けずにログインできるようにしておきます。

# cd /root/vagrant/centos67/
# vagrant ssh-config --host 192.168.33.10 node1 >> ~/.ssh/config
# vagrant ssh-config --host 192.168.33.11 node2 >> ~/.ssh/config
# cat ~/.ssh/config
Host 192.168.33.10
  HostName 127.0.0.1
  User vagrant
  Port 2202
  UserKnownHostsFile /dev/null
  StrictHostKeyChecking no
  PasswordAuthentication no
  IdentityFile "/root/vagrant/centos67/.vagrant/machines/node1/virtualbox/private_key"
  IdentitiesOnly yes
  LogLevel FATAL

Host 192.168.33.11
  HostName 127.0.0.1
  User vagrant
  Port 2203
  UserKnownHostsFile /dev/null
  StrictHostKeyChecking no
  PasswordAuthentication no
  IdentityFile "/root/vagrant/centos67/.vagrant/machines/node2/virtualbox/private_key"
  IdentitiesOnly yes
  LogLevel FATAL

ちょっと分かりずらいのですが、

# vagrant ssh --host [IPアドレス] [ノード名] 

で各ノードのSSH情報をHostをIPアドレス名に変換した形で標準出力に出力し、
その出力結果をrootユーザの「.ssh/config」に書き込んでいます。

SSHログイン確認

# ssh 192.168.33.10
Last login: Mon May  2 09:50:35 2016 from 10.0.2.2
[vagrant@localhost ~]$ exit
logout
Connection to 127.0.0.1 closed.
# ssh 192.168.33.11
Last login: Mon May  2 09:50:39 2016 from 10.0.2.2

問題なくSSHログインできます。

ゲストOS同士のPING確認

# ssh 192.168.33.10
Last login: Mon May  2 09:53:02 2016 from 10.0.2.2
[vagrant@localhost ~]$ ping 192.168.33.11      ※node1⇒node2へのPING
PING 192.168.33.11 (192.168.33.11) 56(84) bytes of data.
64 bytes from 192.168.33.11: icmp_seq=1 ttl=64 time=0.411 ms
64 bytes from 192.168.33.11: icmp_seq=2 ttl=64 time=0.331 ms
64 bytes from 192.168.33.11: icmp_seq=3 ttl=64 time=0.371 ms
64 bytes from 192.168.33.11: icmp_seq=4 ttl=64 time=0.421 ms
e64 bytes from 192.168.33.11: icmp_seq=5 ttl=64 time=0.378 ms
^C
--- 192.168.33.11 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4458ms
rtt min/avg/max/mdev = 0.331/0.382/0.421/0.036 ms
[vagrant@localhost ~]$ exit
logout
Connection to 127.0.0.1 closed.
# ssh 192.168.33.11
Last login: Mon May  2 09:53:07 2016 from 10.0.2.2
[vagrant@localhost ~]$ ping 192.168.33.10      ※node2⇒node1へのPING
PING 192.168.33.10 (192.168.33.10) 56(84) bytes of data.
64 bytes from 192.168.33.10: icmp_seq=1 ttl=64 time=0.291 ms
64 bytes from 192.168.33.10: icmp_seq=2 ttl=64 time=0.316 ms
64 bytes from 192.168.33.10: icmp_seq=3 ttl=64 time=0.237 ms
64 bytes from 192.168.33.10: icmp_seq=4 ttl=64 time=0.313 ms
^C
--- 192.168.33.10 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3246ms
rtt min/avg/max/mdev = 0.237/0.289/0.316/0.033 ms

問題なさそうです。