Creating a Virtual Network
Follow these steps to create a virtual network (VNet) in the Azure portal when you are connecting your Azure account to Dremio Cloud or adding a project to an organization.
Dremio Cloud on Azure currently supports only one subnet for a project. Ensure that your subnet is appropriately sized for the number of virtual machines that will be running in your project[s]. VNet and subnet sizes cannot be updated after creation.
- Log in to the Azure portal.
- Search for "Virtual networks" and select the Virtual networks service in the search results.
- Click Create in the top left.
- On the Basics tab, complete the following:
a. For Subscription, select the appropriate subscription from the dropdown.
b. For Resource group, select the appropriate resource group from the dropdown.
c. For Virtual network name, enter a name for your VNet.
d. For Region, select the region for your VNet.
e. Click Next.
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On the Security tab, click Next without making any modifications.
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On the IP addresses tab, complete the following:
a. (Optional) Modify the default subnet by taking these steps:
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Click the pencil icon displayed to the right of the subnet name in the table.
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In the Edit subnet panel on the right, for Subnet size, select the size from the dropdown. Dremio advises /16 for the subnet size. Then click Save.
b. Click Next.
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On the Tags tab, complete the following:
a. (Optional) For Name, enter a tag name for your resource group.
b. (Optional) For Value, enter a value to help search and filter your resources or track your Azure costs.
c. Click Next.
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On the Review + create tab, click Create.
CIDR Block Reference Table
The number of IP addresses of the VNet must be equal to or greater than the number of IP addresses for the subnet.
The reference table below gives information pertaining to the number of IP addresses created for CIDR blocks.
| CIDR Notation | # of IP Addresses |
|---|---|
| /16 | 65,536 |
| /17 | 32,768 |
| /18 | 16,384 |
| /19 | 8,192 |
| /20 | 4,096 |
| /21 | 2,048 |
| /22 | 1,024 |
| /23 | 512 |
| /24 | 256 |
Azure CLI
A VNet can also be created through the Azure CLI. See the following instructions:
#example of a resource group, a VNet, subnet names, and CIDR blocks given
az network vnet create -g dremiocloudresourcegroup -n dremio-cloud-vnet --address-prefix /16 --subnet-name dremio-cloud-sn --subnet-prefix /16