The network adapter auto-configuration feature of allows while creating VMs to disable DHCP and set network settings (the machine's IP address, Default gateway, and DNS server) automatically.
Currently, this feature is supported only when creating virtual machines from templates. When creating a VM from ISO images, this feature is not supported.
In the Igiko settings, you can specify the DNS server addresses, the Default gateway address, which will be set for all created virtual machines from templates, as well as the IP pool of addresses from which addresses for virtual machines will be taken.
The article Instruction for creating VM templates in Igiko describes how to create VM templates, and what you should pay attention to if you are using the VM network adapter auto-configuration feature.
Configuration
To enable and configure this feature, open the Virtual machines page using the menu on the left and click the Settings button at the bottom. Please note that this button is not displayed when there are selected virtual machines in the table.
Scroll down the page and find the Network adapter auto-configuration feature section. Using the Enabled checkbox, you control the activation of this feature. If you have switched the checkbox to the enabled state, the settings for this function will appear at the bottom, some of which must be filled in to enable it.:
Default gateway is a required parameter.
DNS servers - a maximum of two IPv4 addresses can be specified, an optional parameter.
IP pool - consists of elements in the IPv4 cidr format of subnets. At least one network must be specified. More details below.
After specifying the settings, to save them, click the Save button at the bottom of the page.
Address pool
if the length of the network mask is less than 32, then the broadcast address and the network address are ignored. In this regard, it makes no sense to set the mask length to 31, since the network consists of only these two addresses. If the mask length is 32, then in fact it is a description of one specific IP address that can be allocated.
Additionally, if the Default gateway is part of one of the subnets of the address pool, it will not be issued for the VM.
The address is allocated if the VM is created from a template in Igiko. Each VM can receive only 1 address. If the addresses are uploaded, then creating virtual machines from templates becomes unavailable.
The address is released when the VM to which the address was allocated is deleted. This happens immediately if the deletion was performed through Igiko, or after a while if the VM was deleted in another way.