Reserved instance pools for Yandex Managed Service for Kubernetes node groups

The reserved instance pool feature is at the Preview stage.

A reserved instance pool is the total of computing resources reserved by the user in a given availability zone to secure their guaranteed availability to the user for the purpose of creating VMs of a particular configuration in this availability zone.

For more information, see Reserved instance pools in Compute Cloud.

In Managed Service for Kubernetes, you can use reserved instance pools for fixed-size node groups. This ensures resource availability for cluster nodes.

In Managed Service for Kubernetes, you can use reserved instance pools via the CLI, Terraform, and API.

LimitationsLimitations

Reserved instance pools are not supported for node groups with the following properties:

• Autoscaling
• vCPU performance levels below 100%
• Preemptible VMs
• VM placement groups

ExamplesExamples

In this example, we will create a node group in one availability zone with two nodes from that zone's reserved instance pool.

yc managed-kubernetes node-group create \
  --name k8s-reserved-ng \
  --cluster-id <cluster_ID> \
  --platform-id standard-v4a \
  --cores 4 \
  --memory 8 \
  --disk-size 64 \
  --disk-type network-ssd \
  --fixed-size 2 \
  --location zone=ru-central1-a,subnet-id=<subnet_ID> \
  --network-interface security-group-ids=[<security_group_IDs>] \
  --reserved-instance-pool-id <reserved_instance_pool_ID>

resource "yandex_kubernetes_node_group" "k8s-reserved-ng" {
  cluster_id = "<cluster_ID>"
  name       = "k8s-reserved-ng"

  instance_template {
    platform_id = "standard-v4a"
    reserved_instance_pool_id = "<reserved_instance_pool_ID>"

    resources {
      cores  = 4
      memory = 8
    }

    boot_disk {
      size = 64
      type = "network-ssd"
    }

    network_interface {
      subnet_ids = ["<subnet_ID>"]
      security_group_ids = ["<security_group_IDs>"]
      nat        = true
    }
  }

  scale_policy {
    fixed_scale {
      size = 2
    }
  }

  allocation_policy {
    location {
      zone = "ru-central1-a"
    }
  }
}

Examples for a multi-zone group with nodes from a reserved instance pool using variables are provided on the Node template variables page.

See alsoSee also

• Reserved instance pools in Compute Cloud
• Working with reserved instance pools
• Variables in a Yandex Managed Service for Kubernetes node template
• Creating a group with nodes from a Yandex Compute Cloud reserved instance pool