Ubuntu 18.04 網路設定 netplan

Ubuntu Server 18.04 LTS 版後網路設定變更為netplan

原本 /etc/network/interface 檔案：

# ifupdown has been replaced by netplan(5) on this system.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

上面說明改為 /etc/netplan 目錄下的 50-cloud-init.yaml

50-cloud-init.yaml的內容如下：

# 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:

        ens192:

            dhcp4: true

    version: 2

編輯50-cloud-init.yaml改為靜態 IP如下：

# 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:

        ens192:

            addresses: [10.8.8.88/24]

            gateway4: 10.8.8.1

            nameservers:

              addresses: [8.8.8.8,8.8.4.4]

            dhcp4: no

    version: 2

設定說明：

dhcp4: no 關閉DHCP

addresses: 靜態IP與子網路遮罩Subnet Mask

nameservers: DNS伺服器，多筆用 , 分隔

gateway4: IPv4的預設閘道Gateway

變更後儲存離開編輯。

測試配置

執行測試指令[ sudo netplan try ]，如果設定正確就被接受，否則120 秒後自動還原設定。

測試沒有問題，可執行指令[ sudo netplan apply ]套用設定檔。