Creating clusters

If you don't have the Yandex.Cloud command line interface yet, install and initialize it.

The folder specified in the CLI profile is used by default. You can specify a different folder using the --folder-name or --folder-id parameter.

To create a cluster:

1. View a description of the CLI create cluster command:

   yc managed-kafka cluster create --help
   

2. Specify the cluster parameters in the create command (only some of the supported parameters are given in the example):

   yc managed-kafka cluster create \
      --name <cluster name> \
      --environment <prestable or production> \
      --version <version: 2.1 or 2.6> \
      --network-name <network name> \
      --brokers-count <number of brokers per zone> \
      --resource-preset <host class> \
      --disk-type <disk type> \
      --disk-size <storage size in GB> \
      --assign-public-ip <public access> \
      --security-group-ids <list of security group IDs>
   

To create a cluster, use the create API method and pass the following in the request:

• In the folderId parameter, the ID of the folder where the cluster should be placed.
• The cluster name, in the name parameter.
• Security group IDs in the parameter securityGroupIds.

With Terraform, you can quickly create a cloud infrastructure in Yandex.Cloud. The infrastructure components are identified through configuration files that specify the required cloud resources and their parameters.

If you don't have Terraform, install it and configure the provider.

To create a cluster:

1. In the configuration file, describe the parameters of resources that you want to create:

   • Database cluster: Description of the cluster and its hosts.
   • Network: Description of the cloud network where the cluster will be located. If you already have a suitable network, you don't need to describe it again.
   • Subnets: Description of the subnets to connect the cluster hosts to. If you already have suitable subnets, you don't need to describe them again.

   Example configuration file structure:

   terraform {
     required_providers {
       yandex = {
         source = "yandex-cloud/yandex"
       }
     }
   }
   
   provider "yandex" {
     token = "<OAuth or static key of service account>"
     cloud_id  = "<cloud ID>"
     folder_id = "<folder ID>"
     zone      = "<availability zone>"
   }
   
   resource "yandex_mdb_kafka_cluster" "<cluster name>" {
     environment        = "<PRESTABLE or PRODUCTION>"
     name               = "<cluster name>"
     network_id         = "<network ID>"
     security_group_ids = ["<list of security groups>"]
   
     config {
       assign_public_ip = "<public access to the cluster: true or false>"
       brokers_count    = <number of brokers>
       version          = "<Apache Kafka version: 2.1 or 2.6>"
       kafka {
         resources {
           disk_size          = <storage size in GB>
           disk_type_id       = "<storage type: network-ssd, network-hdd, or local-ssd>"
           resource_preset_id = "<host class>"
         }
       }
   
       zones = [
         "<availability zones>"
       ]
     }
   }
   
   resource "yandex_vpc_network" "<network name>" {
     name = "<network name>"
   }
   
   resource "yandex_vpc_subnet" "<subnet name>" {
     name           = "<subnet name>"
     zone           = "<availability zone>"
     network_id     = "<network ID>"
     v4_cidr_blocks = ["<range>"]
   }
   

   For more information about resources that can be created using Terraform, see the provider documentation.

2. Make sure that the configuration files are correct.

   1. In the command line, go to the folder where you created the configuration file.

   2. Run the check using the command:

      terraform plan
      

   If the configuration is described correctly, the terminal displays a list of created resources and their parameters. If there are errors in the configuration, Terraform points them out. This is a test step. No resources are created.

3. Create a cluster.

   1. If the configuration doesn't contain any errors, run the command:

      terraform apply
      

   2. Confirm that you want to create the resources.

   After this, all the necessary resources will be created in the specified folder and the IP addresses of the VMs will be displayed in the terminal. You can check resource availability and their settings in management console.

Let's say we need to create a Managed Service for Apache Kafka^® cluster with the following characteristics:

• In the cloud with the ID b1gq90dgh25bebiu75o.
• In the folder with the ID b1gia87mbaomkfvsleds.
• With the name mykf.
• In the PRODUCTION environment.
• With Apache Kafka^® version 2.6.
• In the new mynet network with the subnet mysubnet.
• In the new security group mykf-sg allowing connection to the cluster from the Internet via port 9091.
• With one s2.micro host in the ru-central1-c availability zone.
• With one broker.
• With 10 GB fast network storage (network-ssd).
• With public access.

The configuration file for the cluster looks like this:

terraform {
  required_providers {
    yandex = {
      source = "yandex-cloud/yandex"
    }
  }
}

provider "yandex" {
  token = "<OAuth or static key of service account>"
  cloud_id  = "b1gq90dgh25bebiu75o"
  folder_id = "b1gia87mbaomkfvsleds"
  zone      = "ru-central1-c"
}

resource "yandex_mdb_kafka_cluster" "mykf" {
  environment = "PRODUCTION"
  name        = "mykf"
  network_id  = yandex_vpc_network.mynet.id
  security_group_ids = [ yandex_vpc_security_group.mykf-sg.id ]

  config {
    assign_public_ip = true
    brokers_count    = 1
    version          = "2.6"
    kafka {
      resources {
        disk_size          = 10
        disk_type_id       = "network-ssd"
        resource_preset_id = "s2.micro"
      }
    }

    zones = [
      "ru-central1-c"
    ]
  }
}

resource "yandex_vpc_network" "mynet" {
  name = "mynet"
}

resource "yandex_vpc_subnet" "mysubnet" {
  name           = "mysubnet"
  zone           = "ru-central1-c"
  network_id     = yandex_vpc_network.mynet.id
  v4_cidr_blocks = ["10.5.0.0/24"]
}

resource "yandex_vpc_security_group" "mykf-sg" {
  name       = "mykf-sg"
  network_id = yandex_vpc_network.mynet.id

  ingress {
    description    = "Kafka"
    port           = 9091
    protocol       = "TCP"
    v4_cidr_blocks = [ "0.0.0.0/0" ]
  }
}