3.3. Managing Virtual Networks¶
In the compute cluster, you can create and manage two types of virtual networks:
Private. These virtual networks can be used for intercommunication between VMs. They are isolated from each other and from physical networks. You can create private virtual networks with arbitrary IP ranges and not worry about possible IP address conflicts.
External. These virtual networks can be used to access the Internet. They connect to the existing physical networks, therefore their IP ranges and allocation pools must comply with the physical network infrustructure.
Note
One physical network can be integrated only with one external virtual network.
Both private and external virtual networks are listed on the VIRTUAL NETWORKS tab.
The next subsections describe how to add, view, edit, and delete virtual networks.
3.3.1. Creating Virtual Networks¶
To add a new virtual network, do the following:
On the COMPUTE > VIRTUAL NETWORKS tab, click Add virtual network.
In the Network configuration section, configure the network parameters:
Choose network type.
Specify a network name.
For an external network, choose a corresponding physical network with the VM external traffic type from the Physical network drop-down menu.
Specify network’s IPv4 address range in Subnet CIDR. (This will be done automatically for external virtual networks.)
Optionally, specify a gateway. If you leave the Gateway field blank, the first IP address of the specified range will be used as a gateway.
Note
For external virtual networks, you need to specify a physical gateway.
Click Next.
In the DCHP and DNS section, set the DHCP server and specify one or more allocation pools and DNS servers:
- With the DHCP server enabled, virtual NICs will be automatically assigned IP addresses from the virtual network IP range or allocation pools. With the DHCP server disabled, virtual NICs will automatically be allocated IP addresses, but you will have to manually assign them inside VMs.
- If you do not specify allocation pools, IP addresses will be allocated from the entire IP range of the virtual network.
- DNS servers can be specified only if the DHCP server is enabled.
Click Next.
In the Summary section, review the the virtual network configuration and click Add virtual network.
3.3.2. Editing Virtual Networks Parameters¶
To view and edit parameters of a virtual network, click it on the VIRTUAL NETWORKS tab. A panel with the virtual network details will open.
On this panel, you can change the virtual network name, gateway, DHCP settings, allocation pools, and DNS servers. To do this, click the pencil icon, enter a new value, and click the tick icon to confirm.
3.3.3. Deleting Virtual Networks¶
Important
Before deleting a virtual network, make sure no VMs are connected to it.
To delete one or more virtual networks, do the following:
- On the VIRTUAL NETWORKS tab, either:
- select networks and click Delete above the list, or
- click the ellipsis icon next to the network and select Delete, or
- click a network to open its details and click Delete on the top toolbar.
- In the Delete networks window, confirm the action by clicking Delete.