Static IP Configuration
Disable cloud-init and DHCP to configure static IP addresses on your instance.
Important Note
If your instance has both a static IP and a floating IP, the static IP should be configured statically instead of using DHCP. This ensures proper routing and prevents connectivity issues.
Overview
The cloud images that we provide use cloud-init and DHCP to configure your instance network interfaces. There may be a situation where you want to disable cloud-init and/or DHCP and set your IP addresses statically. This can be accomplished a variety of ways. Feel free to use the configuration examples below as desired.
Example Netplan Configuration (Debian/Ubuntu)
Log into your server
Connect to your instance via SSH.
Get root access
sudo -iDisable cloud-init network configuration
Create a new cloud-init configuration file /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with contents:
network: {config: disabled}Edit Netplan configuration
Edit /etc/netplan/50-cloud-init.yaml. Remove the dhcp4 and dhcp6 lines and replace with:
addresses:
- <your IPv4 address>/24
- "<your IPv6 address>/64"
nameservers:
addresses: [8.8.8.8, 8.8.4.4, 2001:4860:4860::8888, 2001:4860:4860::8844]
gateway4: <your IPv4 gateway>
gateway6: "<your IPv6 gateway>"Apply your changes
Use netplan try to verify first, then apply:
netplan applyVerify configuration persists
Reboot to confirm cloud-init no longer configures networking (check for no new netplan file changes).
Note: Other example configurations can be found on the Netplan website. DHCP (4 and 6) can be combined with static address configuration as well.
Example Interfaces Configuration (Debian/Ubuntu)
Log into your server
Connect to your instance via SSH.
Disable cloud-init network configuration
Create a new cloud-init configuration file /etc/cloud/cloud.cfg.d/95-debian-network-config.cfg with contents:
network: {config: disabled}Comment out cloud-init interface config
Edit /etc/network/interfaces.d/50-cloud-init.cfg and comment all lines related to eth0 (or any interface you want to statically configure).
Configure static IPv4
Edit /etc/network/interfaces. Replace iface eth0 inet dhcp with:
iface eth0 inet static
address <your IPv4 address>/24
gateway <your IPv4 gateway>Configure static IPv6 (optional)
You can add IPv6 the same way:
iface eth0 inet6 static
address <your IPv6 address>/64
gateway <your IPv6 gateway>Apply changes
Save and close the file. Then run:
ifdown eth0; ifup eth0Or simply reboot the server.
Example Sysconfig Configuration (RHEL: CentOS, AlmaLinux, RockyLinux)
Log into your server
Connect to your instance via SSH.
Disable cloud-init network configuration
Replace the contents of /etc/cloud/cloud.cfg.d/90-centos-networking.cfg with:
network: {config: disabled}Configure network interface
Replace the contents of /etc/sysconfig/network-scripts/ifcfg-eth0 with:
BOOTPROTO=static
DEVICE=eth0
ONBOOT=yes
TYPE=Ethernet
IPADDR=<your IPv4 address>
PREFIX=24
GATEWAY=<your IPv4 gateway>
IPV6ADDR=<your IPv6 address>/64
IPV6_DEFAULTGW=<your IPv6 gateway>Apply changes
Run the following commands to apply the changes:
systemctl disable dhclient6.service
ifdown eth0; ifup eth0Or simply reboot the server.