Create Virtual Machine

Introduction to how to create virtual machines in local IDC environments.

tip

Before creating virtual machines, you need to create IP subnets, upload virtual machine images, enable hosts, and other operations in advance.

Create Through Frontend

In the Host menu, select Virtual Machine, then select New. On this interface, enter the hostname, select image and IP subnet, and create the virtual machine. Screenshots are as follows:

Enter virtual machine name vm0:

Select virtual machine configuration and image according to your needs. For example, the configuration in the screenshot below is: CPU 2 cores, memory 2G, image CentOS-7-aarch64-GenericCloud-2003.qcow2:

Select virtual machine network. Here select subnet vnet0 in vpc0, then click New:

After the virtual machine is created, the status becomes Running. You can click Password to get login information, then click the Remote Control button and select VNC Remote Terminal to log in to the virtual machine.

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tip

For other login methods, please refer to: Login to Virtual Machine.

Create Through climc

The climc server-create command provides operations to create cloud hosts. Because the platform can manage multiple private clouds and public clouds at the same time, different suppliers have their own authentication methods. Before creating cloud hosts, you need to do some different preparation work.

The command to create a machine is server-create. You can use climc server-create --help to view all parameters for creating a server. Common parameters are as follows:

Parameter Name	Type	Function
--ncpu	int	Virtual machine CPU count
--disk	[]string	Specify the system disk image to create. Specifying multiple times means creating multiple disks for the virtual machine
--net	[]string	Specify the network used by the virtual machine. Specifying multiple times will add multiple network cards to the virtual machine
--allow-delete	bool	Allow deleting virtual machine
--auto-start	bool	Auto start after creation
--password	string	Set virtual machine password
--tenant	string	Create to specified project
--prefer-region	string	Create to specified region
--prefer-zone	string	Create to specified zone
--prefer-host	string	Create to specified host

tip

1. Name, memory or instance type must be used when creating hosts;
2. System disk images can be queried through image-list or cached-image-list. Public cloud image lists can be queried through the cached-image-list interface. Refer to: Query Image;

The following creates machines by example:

Specifications to create:

Name	Instance Type	Memory	cpu	System Disk	Network	Others
vm1	-	4g	4	centos7.qcow2 60g	net1	2 data disks, one 100g ext4 mounted to /opt, another 50g xfs mounted to /data; auto start
vm2	-	2g	2	ubuntu18.04.qcow2 100g	net2	Allow delete
vm3	t2.nano	-	-	centos6.qcow2	net3	-

# Create vm1
$ climc server-create --disk centos7.qcow2:60g --disk 100g:ext4:/opt --disk 50g:xfs:/data --ncpu 4 --net net1 --auto-start --mem-spec 4g vm1

# Create vm2
$ climc server-create --disk ubuntu18.04.qcow2:100g --net net2 --allow-delete --auto-start --ncpu 2 --mem-spec 2g vm2

# Create vm3
$ climc server-create --instance-type t2.nano --disk centos6.qcow2 --net net3 --auto-start vm3

Hostname Expression Examples

Host (including virtual machines and bare metal) names support expressions. Expression format is: ${variable_name}, variable names need to be lowercase. For example, ${host} means the virtual machine name displays as the name of the host where the virtual machine is created; ${region}-${zone} means display as region name-availability zone name, etc.

Supported variable names are as follows:

Variable Name	Example	Description
charge_type	postpaid	Billing method
cloud_env	onpremise/public/private	Used to distinguish local IDC, private cloud and public cloud platforms
cloudregion_id	default	Region id
cpu	1	CPU count
host	gobuild	Host name
host_id	16f49f8a-88cc-4715-8870-f78130196fa9	Host id
ip_addr	192.168.1.1	IP address
mem	1024	Memory
os_distribution	Operating System	CentOS
os_type	Linux	Operating system type
os_version	6.9	Operating system version
owner_tenant	system	Project
owner_tenant_id	d56f5c37e36a42b782d7f32b19497c4c	Project id
region	Default	Region
hypervisor	kvm	Virtualization method
res_name	server	Resource category
template_id	5199f56b-01c2-425c-8e29-0179d283e4a3	Template id
zone	zone1	Availability zone
zone_id	00f3f3c6-1d16-4053-81f1-4cb092f418f5	Availability zone id