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ubuntu 18.04 네트워크 설정

NetPlan은 우분투 17.10부터 도입된 새로운 네트워크 구성 도구 입니다.

기존 /etc/network/interface 파일을 대체하며 /etc/netplan/*.yaml을 사용하여 우분투
네트워크를 설정합니다.

ubuntu 18.04 에서 진행하였습니다.

root@smileserv:~# cat /etc/issue
Ubuntu 18.04.1 LTS \n \l

 

네트워크 인터페이스 확인

root@smileserv:~# ifconfig -a
enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.0.2.15  netmask 255.255.255.0  broadcast 10.0.2.255
        inet6 fe80::a00:27ff:fe13:a97c  prefixlen 64  scopeid 0x20<link>
        ether 08:00:27:13:a9:7c  txqueuelen 1000  (Ethernet)
        RX packets 634  bytes 686396 (686.3 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 302  bytes 32975 (32.9 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp0s8: enp0s8: flags=4098<BROADCAST,MULTICAST>  mtu 1500  
        ether 08:00:27:16:da:4a  txqueuelen 1000  (Ethernet)
        RX packets 3081  bytes 274464 (274.4 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2991  bytes 420676 (420.6 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

기본 설정값을 확인하였습니다.

root@smileserv:~# vi /etc/netplan/50-cloud-init.yaml

# This file is generated from information provided by
# the datasource.  Changes to it will not persist across an instance.
# To disable cloud-init’s network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
    ethernets:
        enp0s3:
            addresses: []
            dhcp4: true
    version: 2

 

enp0s8 인터페이스를 netplan을 이용해 설정 해보겠습니다.

root@smileserv:/etc/netplan# cp -arp 50-cloud-init.yaml 01-netcfg.yaml

 

root@smileserv:~# vi /etc/netplan/01-netcfg.yaml

# This file is generated from information provided by
# the datasource.  Changes to it will not persist across an instance.
# To disable cloud-init’s network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
    ethernets:
        enp0s8:
            dhcp4: no
            addresses: [192.168.56.110/24]
            gateway4: 192.168.56.1
            nameservers:
                    addresses: [8.8.8.8]
    version: 2

  • dhcp4 : IPv4 dhcp 설정
  • dhcp6 : IPv6 dhcp 설정
  • addresses : ,로 구분한 IP 멀티로 가능
  • gateway4 : IPv4 gateway 설정
  • nameservers : dns 설정 ,로 구분 멀티로 설정 가능 [생략 가능]

 

다음 명령어로 설정을 적용합니다.

root@smileserv:~# netplan apply

 

설정값을 확인합니다.

root@smileserv:~# ifconfig
enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.0.2.15  netmask 255.255.255.0  broadcast 10.0.2.255
        inet6 fe80::a00:27ff:fe13:a97c  prefixlen 64  scopeid 0x20<link>
        ether 08:00:27:13:a9:7c  txqueuelen 1000  (Ethernet)
        RX packets 636  bytes 687576 (687.5 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 312  bytes 34213 (34.2 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp0s8: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.56.110  netmask 255.255.255.0  broadcast 192.168.56.255
        inet6 fe80::a00:27ff:fe16:da4a  prefixlen 64  scopeid 0x20<link>
        ether 08:00:27:16:da:4a  txqueuelen 1000  (Ethernet)
        RX packets 3455  bytes 307797 (307.7 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3364  bytes 489408 (489.4 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

 

 

예전방식 ( /etc/network/interface)  으로 설정하고 싶은 경우에는 ifupdown 패키지를 설치하고 설정하면 됩니다.

 root@smileserv:~# apt-get install ifupdown

Reading package lists… Done
Building dependency tree
Reading state information… Done
ifupdown is already the newest version (0.8.17ubuntu1.1).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

root@smileserv:~# reboot

기존 우분투  네트워크 설정과 동일하게 설정하시면 됩니다 .

root@smileserv:~# vi /etc/network/interfaces

# ifupdown has been replaced by netplan(5) on this system.  See
# /etc/netplan for current configuration.
# To re-enable ifupdown on this system, you can run:
#    sudo apt install ifupdown

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto enp0s3
iface enp0s3 inet dhcp

# The primary network interface
auto enp0s8
iface enp0s8 inet static
address 192.168.56.101
netmask 255.255.255.0
gateway 192.168.56.1
dns-nameservers 164.124.101.2

네트워크를 재시작 합니다 .

root@smileserv:~# /etc/init.d/networking restart
[ ok ] Restarting networking (via systemctl): networking.service.

설정되었는지 확인합니다.

root@smileserv:~# ifconfig

enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.0.2.15  netmask 255.255.255.0  broadcast 10.0.2.255
        inet6 fe80::a00:27ff:fe13:a97c  prefixlen 64  scopeid 0x20<link>
        ether 08:00:27:13:a9:7c  txqueuelen 1000  (Ethernet)
        RX packets 14  bytes 3258 (3.2 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 48  bytes 5086 (5.0 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp0s8: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.56.101  netmask 255.255.255.0  broadcast 192.168.56.255
        inet6 fe80::a00:27ff:fe16:da4a  prefixlen 64  scopeid 0x20<link>
        ether 08:00:27:16:da:4a  txqueuelen 1000  (Ethernet)
        RX packets 1599  bytes 142447 (142.4 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1945  bytes 243039 (243.0 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

 

 

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