Managed Kubernetes Product Description

Last update: November 12 2024

Managed Kubernetes Product Description

Selectel's Managed Kubernetes simplifies the process of deploying, scaling and maintaining your Kubernetes container infrastructure. Selectel is responsible for version updates, security and uptime of Control Plane Kubernetes.

The product supports user types and roles, projects и project limits and quotas.

Versions⁠

Managed Kubernetes clusters on cloud servers support versions 1.28.x, 1.29.x, 1.30.x

In Managed Kubernetes clusters on dedicated servers, only version 1.28.x is supported

How Managed Kubernetes works⁠

Managed Kubernetes can work:

• on cloud servers — utilizes the resources of the cloud platform;
• dedicated servers — utilizes dedicated servers, dedicated server networks and cloud platform resources (load balancers, public subnets, public IP addresses).

Read more about the resources used in the instructions Projects.

As a container execution environment (CRI) is used containerd. As. CNI Managed Kubernetes clusters use Calico.

You can work with a Managed Kubernetes cluster in a control panels and through API Managed Kubernetes. You can also work with the cluster on the cloud server via the Terraform.

Cluster composition⁠

Managed Kubernetes clusters consist of:

• of master nodes — contain the management components of the cluster, Control Plane. The number of master nodes depends on cluster type. Master nodes are not displayed in the control panel, for them Selectel responds;

• groups of work nodes — contain containers of user applications. The work nodes are displayed in the control panel, for them user replies. Read more in section Working with groups of nodes.

Types of cluster⁠

Selectel provides two types of Managed Kubernetes clusters: fault-tolerant and basic.

You can only select a cluster type when cluster creation. Once a cluster is created, the cluster type cannot be changed.

	Fault-tolerant	Basic
Number of master notes	3	1
Master Node Allocation	in different pool segments — if there are multiple segments in the pool; or in the same pool segment on different hosts — if there is only one segment in the pool	In one. pool segment
Fault tolerance	If one of the three master nodes is unavailable, Control Plane will continue to run	If the master node is unavailable, Control Plane will not work
SLA	✓ (99,98%)	✗
Functionality	All functionality is available	Auto-update of patch versions is not available
What tasks are suitable for	For the working environment (production)	for the developer's environment (development); test environment (testing and staging); pet projects

Limitations⁠

Cloud server

Maximum number of fault-tolerant Kubernetes clusters in one pool for one project	10
Maximum number of Kubernetes base clusters in one pool for one project	10
Maximum number of node groups in one pool for one project	100
Maximum number of nodes in one node group	15
Maximum number of vCPU nodes	32*
Maximum number of RAM nodes	256*GB
Maximum size of the node boot disk	1.2 TB.
Maximum number of pods on one node	100
Maximum number PV on the same node	256
Minimum size of one PV	1 GB

*You can create nodes with more vCPUs and RAM — use the fixed cloud server configurations.

Dedicated server

• maximum number of fault-tolerant Kubernetes clusters in one pool for one project — 10;
• maximum number of Kubernetes base clusters in one pool for one project — 10;
• maximum number of node groups in a cluster — 1;
• maximum number of nodes in one node group — 20;
• unsupported changing the number of nodes in the group;
• node group on dedicated servers can only be added to new clusters;
• A group of nodes on dedicated servers must be in the same accessibility zone with master nodes;
• only Kubernetes version 1.28.x is available. Updating Kubernetes versions is unsupported;
• automation is not supported: auto-update of patch versions, autoscaling и auto-recovery;
• Adding, modifying, and deleting labels and tints after cluster creation is not supported;
• connection is not supported permanent volumes (PV) based on the network disks of the cloud platform;
• Managed Kubernetes cluster creation with GPUs and Intel® SGX is not supported.

Areas of responsibility⁠

Selectel provides⁠

• creation and accessibility of master notes;
• creation of working nodes;
• updating versions of the Managed Kubernetes cluster;
• masternode monitoring;
• possibility of autoscaling of nodes;
• Node auto-recovery capability;
• data storage security in accordance with the requirements of 152-FZ;
• integration with Selectel services;
• technical support.

Selectel is not responsible for⁠

• for managing the Managed Kubernetes cluster;
• node management;
• application creation;
• initiating scaling and upgrades.

If you need help with Managed Kubernetes cluster administration, order service administration services.