Create a fixed configuration Redis cluster via Terraform

We recommend creating resources in order. If you create all resources at once, Terraform will account for dependencies between resources that you specified in the configuration file. If dependencies are not specified, resources will be created in parallel, which may lead to errors. For instance, a resource required for creating another resource might not have been created yet.

Optional: configure providers.
Create a private network and subnet.
Create a cluster.

Configuration files

Example file for configuring providers

terraform {
  required_providers {
    servercore  = {
      source  = "terraform.servercore.com/servercore/servercore"
      version = "~> 6.0"
    }
    openstack = {
      source  = "terraform-provider-openstack/openstack"
      version = "2.1.0"
    }
  }
}

provider "servercore" {
  domain_name = "123456"
  username    = "user"
  password    = "password"
  auth_region = "uz-1"
  auth_url    = "https://cloud.api.servercore.com/identity/v3/"
}

resource "servercore_project_v2" "project_1" {
  name = "project"
}

resource "servercore_iam_serviceuser_v1" "serviceuser_1" {
  name         = "username"
  password     = "password"
  role {
    role_name  = "member"
    scope      = "project"
    project_id = servercore_project_v2.project_1.id 
  }
}

provider "openstack" {
  auth_url    = "https://cloud.api.servercore.com/identity/v3"
  domain_name = "123456"
  tenant_id   = servercore_project_v2.project_1.id
  user_name   = servercore_iam_serviceuser_v1.serviceuser_1.name
  password    = servercore_iam_serviceuser_v1.serviceuser_1.password
  region      = "uz-1"
}

Example file for creating a Redis cluster with a fixed configuration

resource "openstack_networking_network_v2" "network_1" {
  name           = "private-network"
  admin_state_up = "true"
}

resource "openstack_networking_subnet_v2" "subnet_1" {
  network_id = openstack_networking_network_v2.network_1.id
  cidr       = "192.168.199.0/24"
}

data "servercore_dbaas_datastore_type_v1" "datastore_type_1" {
  project_id = servercore_project_v2.project_1.id
  region     = "uz-1"
  filter {
    engine  = "redis"
    version = "6"
  }
}

data "servercore_dbaas_flavor_v1" "flavor_1" {
  project_id = servercore_project_v2.project_1.id
  region     = "uz-1"
  filter {
    datastore_type_id = data.servercore_dbaas_datastore_type_v1.datastore_type_1.datastore_types[0].id
    fl_size           = "standard"
    vcpus             = 2
    ram               = 6144
    disk              = 50
  }
}

  resource "servercore_dbaas_redis_datastore_v1" "datastore_1" {
  name           = "datastore-1"
  project_id     = servercore_project_v2.project_1.id
  region         = "uz-1"
  type_id        = data.servercore_dbaas_datastore_type_v1.datastore_type_1.datastore_types[0].id
  subnet_id      = openstack_networking_subnet_v2.subnet_1.id
  node_count     = 2
  flavor_id      = data.servercore_dbaas_flavor_v1.flavor_1.flavors[0].id
  redis_password = "secret"
}

1. Optional: configure providers

If you have configured the Servercore and OpenStack providers, skip this step.

Make sure you have created a service user in the control panel member with roles in the Account access scope and iam.admin.
Create a directory to store configuration files and a separate file with the .tf extension to configure providers.
Add the Servercore and OpenStack providers to the file for provider configuration:
```
terraform {
  required_providers {
    servercore  = {
      source  = "terraform.servercore.com/servercore/servercore"
      version = "~> 7.1.0"
    }
    openstack = {
      source  = "terraform-provider-openstack/openstack"
      version = "2.1.0"
    }
  }
}
```
Here version is the provider version. The current version of the OpenStack provider can be found in the Terraform Registry and GitHub.

For more information about products, services, and features that can be managed using providers, see the Servercore and OpenStack Providers guide.
Initialize the Servercore provider:
```
provider "servercore" {
  domain_name = "123456"
  username    = "user"
  password    = "password"
  auth_region = "uz-1"
  auth_url    = "https://cloud.api.servercore.com/identity/v3/"
}
```
Where:
- domain_name — Servercore account number. You can find it in the control panel in the top-right corner;
- username — the name of the service user with the member role in the Account access scope and iam.admin. You can view it in the control panel: in the top menu, click IAM → Service Users section (this section is only available to the account owner and users with the iam.admin role);
- password — service user password. You can view it when creating the user or change it to a new one;
- auth_region — pool for authentication in the uz-1 format; do not use pools in the SPB-2 format. The authentication pool may not match the pool where you create resources. The list of available pools can be found in the Availability Matrix instructions.
Create a project:
```
resource "servercore_project_v2" "project_1" {
  name = "project"
}
```
See the detailed resource description for servercore_project_v2.
Create a service user for project access and assign the member role in the Project access scope:
```
resource "servercore_iam_serviceuser_v1" "serviceuser_1" {
  name         = "username"
  password     = "password"
  role {
    role_name  = "member"
    scope      = "project"
    project_id = servercore_project_v2.project_1.id
  }
}
```
Where:
- username — user name;
- password — user password. The password must be at least 20 characters long and include at least:
  - one uppercase and one lowercase Latin letter (A-Z, a-z);
  - one digit (0-9);
  - one special character from the ASCII Printable 7-Bit Special Characters list:
    !"#$%&'()*+,-./:;<=>?@[]^_{|}~;
- project_id — project ID. You can find it in the control panel: in the top menu, click IAM → Projects section → in the row of the required project, click .
See the detailed resource description for servercore_iam_serviceuser_v1.

Initialize the OpenStack provider:

provider "openstack" {
  auth_url    = "https://cloud.api.servercore.com/identity/v3"
  domain_name = "123456"
  tenant_id   = servercore_project_v2.project_1.id
  user_name   = servercore_iam_serviceuser_v1.serviceuser_1.name
  password    = servercore_iam_serviceuser_v1.serviceuser_1.password
  region      = "uz-1"
}

Where:

domain_name — Servercore account number. You can view it in the control panel in the top-right corner;
region — pool, for example, uz-1. All resources will be created in this pool. The list of available pools can be found in the Availability Matrix instructions.

If you are creating resources at the same time as configuring providers, add the depends_on argument for OpenStack resources. For example, for the openstack_networking_network_v2 resource:

resource "openstack_networking_network_v2" "network_1" {
  name           = "private-network"
  admin_state_up = "true"

  depends_on = [
    servercore_project_v2.project_1,
    servercore_iam_serviceuser_v1.serviceuser_1
  ]
}

Open the CLI.
Initialize the Terraform configuration in the directory:
```
terraform init
```
Verify that the configuration files are syntactically correct:
```
terraform validate
```
Format the configuration files:
```
terraform fmt
```
Check which resources will be created:
```
terraform plan
```
Apply the changes and create the resources:
```
terraform apply
```
Confirm creation — enter yes and press Enter. The created resources will appear in the control panel.
If you do not have enough quotas to create resources, increase the quotas.

2. Create a private network and subnet

resource "openstack_networking_network_v2" "network_1" {
  name           = "private-network"
  admin_state_up = "true"
}

resource "openstack_networking_subnet_v2" "subnet_1" {
  name       = "private-subnet"
  network_id = openstack_networking_network_v2.network_1.id
  cidr       = "192.168.199.0/24"
}

Here cidr is the private subnet CIDR, for example 192.168.199.0/24.

See the detailed resource description:

3. Create a fixed configuration cluster

data "servercore_dbaas_datastore_type_v1" "datastore_type_1" {
  project_id = servercore_project_v2.project_1.id
  region     = "uz-1"
  filter {
    engine  = "redis"
    version = "6"
  }
}

data "servercore_dbaas_flavor_v1" "flavor_1" {
  project_id = servercore_project_v2.project_1.id
  region     = "uz-1"
  filter {
    datastore_type_id = data.servercore_dbaas_datastore_type_v1.datastore_type_1.datastore_types[0].id
    fl_size           = "standard"
    vcpus             = 2
    ram               = 6144
    disk              = 50
  }
}

resource "servercore_dbaas_redis_datastore_v1" "datastore_1" {
  name           = "datastore-1"
  project_id     = servercore_project_v2.project_1.id
  region         = "uz-1"
  type_id        = data.servercore_dbaas_datastore_type_v1.datastore_type_1.datastore_types[0].id
  subnet_id      = openstack_networking_subnet_v2.subnet_1.id
  node_count     = 2
  flavor_id      = data.servercore_dbaas_flavor_v1.flavor_1.flavors[0].id
  redis_password = "secret"
}

Where:

region — a pool, e.g. uz-1. The list of available pools can be viewed in the Availability Matrix guide;
filter — a filter for managed database types:
- engine — a managed database type;
- version — managed database version. The list of available versions can be viewed in the Versions and configurations guide;
filter — filter for fixed cluster configurations. The list of available configurations can be viewed in the Versions and configurations guide;
- fl_size — fixed configuration tier. Available values are standard and high_freq;
- vcpus — number of vCPUs;
- ram — amount of RAM in MB;
- disk — disk size in GB;
nodes_count — number of nodes. The maximum number of nodes is 3;
redis_password — database password. The password length is between 32 and 64 characters, including uppercase letters, digits, and special characters.

See a detailed description of data sources and resources: