Create hosts with Yandex Cloud hostprovider

Daria Barysheva

IMPORTANT

Before adding hosts, ensure that the Yandex Cloud hostprovider is installed and configured via ADCM.
This guide explains how to add a single host. To add several hosts simultaneously, run the hostprovider action Create hosts.

The steps for adding a single host are listed below:

Select the Hosts item in the left navigation menu and click Create host.

Add a host via ADCM
In the opened dialog:
- Select a hostprovider in the Hostprovider field. Notice that hostproviders are displayed with the names that you have assigned to them.
- Enter a host name in the Name field.
- Click Create.
Describe a new host
Return to the Hosts page and switch to configuring the added host. To do this, click the host name in the Name column.

Go to configuring a host

In the opened window, select the Primary Configuration tab, switch on the Show advanced toggle, fill in parameters, and click Save.

Configure a host

The assignment of parameters is listed in the table below.

Host configuration parameters
Parameter	Description	Default value
Connection address	Read-only. An IP address of the created VM. It is filled in automatically during the *Init* action	—
Secondary NIC IP address	Read-only. An IP address of the second network interface controller (NIC) that is used by the created VM. It is filled in automatically during the *Init* action	—
Port	Read-only. A port number that is used for connecting to the created VM via SSH	22
Username	Read-only. A user name that is used for connecting ADCM to the created VM via SSH. It is filled in automatically during the *Init* action	root
Ansible become	Read-only. A flag that grants the superuser privileges to the user specified in the *Username* field	true
SSH args	Read-only. SSH arguments for Ansible. The `StrictHostKeyChecking=no` and `UserKnownHostsFile=/dev/null` parameters disable strict host key checking for SSH. Otherwise, when this checking is enabled, the SSH client connects only to the known hosts that are stored in the known host list	-o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null
Additional users groups	A list of additional Linux groups. All users are added to this list at the moment the VMs are being initialized. For example, in the Alt Linux image the `ansible` user should be added to the `wheel` group. Each group should exist in the image. Enter each group separately — by clicking the icon in the *Additional users groups* node and editing the new list element `Additional users groups [N]` subsequently	—
Login	Read-only. A name of the user that is created on the new VM. It is filled in automatically during the *Init* action	—
Public SSH key	Read-only. A public SSH key of the new user with the *Login* name. It is filled in automatically during the *Init* action	—
Cloud-init timeout	A timeout for `cloud-init` to finish the running tasks (in seconds)	600
Init script	The initialization script that is executed at VMs deployment. A shebang (`#!`) is not needed. Pay attention that this option is experimental: single or double quotes may break the installation process	—
Image family	A family of operating systems based on which VMs are created. The newest image from the specified family is used. Starting with Yandex Cloud hostprovider 2.13, you can fill in the parameter value manually	centos-7
Snapshot id	An ID of the boot disk snapshot. Incompatible with the *Image id* parameter	—
Image id	An ID of the boot disk image. Can be obtained via two commands: For public images: `yc compute image list --folder-id standard-images` For private images: `yc compute image list` Incompatible with the *Snapshot id* parameter	—
Platform	A processor type. For more information on supported platforms, refer to the Yandex Cloud documentation. Possible values: `Intel Broadwell` `Intel Cascade Lake` `Intel Ice Lake` (starting with Yandex Cloud hostprovider 2.15)	Intel Cascade Lake
vCPU	A number of vCPU	2
Perfomance level (%)	A guaranteed processor performance level that is allocated to VMs. See more details in the Yandex Cloud documentation	100
Memory (GB)	RAM (in GB)	2
Disk type	A storage class of VMs. Possible values: `SSD` `HDD` `SSD-NONREPLICATED` (starting with Yandex Cloud hostprovider 2.13)	HDD
Disk size, GB	A size of the boot disk that is created for VMs (in GB)	50
Additional disks (JSON)	Parameters of additional disks in the JSON format: `autodelete` — a flag that indicates whether to remove a disk after removing a VM. `description` — a disk description. `type` — a disk type (see *Disk type* above). `size` — a disk size in GB. All parameters are required. Example: `[ { "autodelete": true, "description": "disk1", "type": "ssd", "size": 10 }, { "autodelete": false, "description": "disk2", "type": "hdd", "size": 100 } ]`	—
Assign public ip	Whether or not to assign public IP addresses to VMs	false
Assign secondary NIC	A flag that indicates whether to use the second network interface controller (NIC) for VM. You need to define the *Secondary subnet ID* value in the Yandex Cloud hostprovider settings first	false
Security Group IDs	Security group identifiers that will be used for all created VMs by default. The security groups that are specified during the *Create hosts* action have a higher priority compared to the groups specified at the hostprovider level. Enter each group separately — by clicking the icon in the *Security Group IDs* node and editing the new list element `Security Group IDs [N]` subsequently	—
Labels	Labels that will be used for all created VMs by default. The labels that are specified during the *Create hosts* action have a higher priority compared to the labels specified at the hostprovider level. Enter each label separately — by clicking *Add property* in the *Labels* node and editing the new list element `Labels [N]` subsequently. In the dialog that opens, enter a label key in *Enter field name* and a label value in *Enter field value*	—
Preemptible	Whether or not to mark VMs as preemptible. Preemptible machines work for no longer than 24 hours and can be interrupted by the cloud provider at any time. The rental cost in this case is much cheaper. The parameter may be defined only before the VM initialization	false
ADCM control connection address type	An IP address type that is used by ADCM to communicate with VMs. Determines whether the connection between ADCM and the Yandex Cloud should use an external or internal route. If ADCM is deployed in another cloud and VPN is not configured, set the parameter value to `public`. Possible values: `private` — a private address. `public` — a public address.	private

As a result of the completed steps, a virtual machine is created in the Yandex Cloud, and new actions become available for the corresponding host on the Hosts page in ADCM. The statuschecker is installed on the new host automatically. Thus, you do not need to run the Install statuschecker action for the created host.

Actions available on the Hosts page

NOTE

During the virtual machine creation, the adcm user is automatically added to the VM (and subsequently displayed in the Username and Login host settings in ADCM). This user is used only by ADCM to connect to the VM in the cloud (e.g. during the RPM package installation).
To connect to the new VM for your personal needs, use logins of the users whose public keys are listed in the Ssh keys field of the Yandex Cloud hostprovider settings. To add new users, run the Create users action.

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