This document covers the minimal hardware recommendations for the Kublr Platform and Kublr Kubernetes cluster. After reading this article you can plan deployment of you Kublr Platform and Kublr Kubernetes cluster installation.
| Role | Minimal required memory | Minimal required CPU (cores) | Components |
|---|---|---|---|
| Master node | 2.5 GB | 1.5 | Kublr-Kubernetes master components (k8s-core, cert-updater, fluentd, kube-addon-manager, rescheduler, network, etcd, proxy, kubelet) |
| Worker node | 1 GB | 0.5 | Kublr-Kubernetes worker components (fluentd, dns, proxy, network, kubelet) |
| Centralized monitoring agent * | 2 GB | 0.7 | Prometheus. We recommend limit 2GB for typical installation of managed cluster which has 8 working, 40 pods per node with total 320 nodes. Retention period for prometheus agent is 1 hour. |
| Centralized logging agent * | 0.5 GB | 0.4 | Rabbitmq |
| Feature | Required memory | Required CPU |
|---|---|---|
| Feature: Control Plane | 1.6 GB | 1 |
| Feature: Centralized monitoring | 5 GB | 1.2 |
| Feature: Centralized logging | 11 GB | 1.4 |
| Feature: k8s core components | 0.4 GB | 0.1 |
Single master kubernetes cluster, at one-two worker nodes, use all Kublr’s features (two for basic reliability)
For a minimal Kublr Platform installation you should have one master node with 4GB memory and 2 CPU and worker node(s) with total 10GB + 1GB × (number of nodes) and 4.4 + 0.5 × (number of nodes) CPU cores.
Please note: We do not recommend using this configuration in production but this configuration is suitable to start exploring the Kublr Platform.
| Provider | Master Instance Type | Worker Instance Type |
|---|---|---|
| Amazon Web Services | t2.medium/t3.medium (2 vCPU, 4GB) | 2 × t2(t3) xlarge (4 vCPU, 16GB) |
| Google Cloud Platform | n1-standard-2 (2 vCPU, 7.5GB) | 2 × n1-standard-4 (4 vCPU, 15GB) |
| Microsoft Azure | A2 v2 (2 vCPU, 4GB) | 2 × A8 v2 (8 vCPU, 16GB) |
| On-premises | 2 vCPU, 4GB | 2 × VM (3 vCPU, 10GB) |
Master node: Kublr-Kubernetes master components (2.5GB, 1.5 vCPU),
Worker node 1: Kublr-Kubernetes worker components (1GB, 0.5 vCPU), Feature: ControlPlane (1.6GB, 1 vCPU), Feature: Centralized monitoring (5 GB, 1.2 vCPU) Feature: k8s core components (0.4 GB, 0.1 vCPU) Feature: Centralized logging (11GB, 1.4 vCPU)
Worker node 2: Kublr-Kubernetes worker components (1GB, 0.5 vCPU), Feature: Centralized logging (11GB, 1.4 vCPU)
Kublr has several self-hosted features, which could be installed separated in Kublr-Kubernetes clusters.
| Feature | Required memory | Required CPU |
|---|---|---|
| Self-hosted logging | 9GB | 1 |
| Self-hosted monitoring | 2.8GB | 1.4 |
Note: By default Kublr disables scheduling business application on the master (you can change that), so we use only worker nodes in our formula.
Available memory = (number of nodes) × (memory per node) - (number of nodes) × 1GB - (has Self-hosted logging) × 9GB - (has Self-hosted monitoring) × 2.9GB - 0.4 GB - 2GB (Central monitoring agent per every cluster) - 0.3 (Central logging agent per every cluster).
Available CPU = (number of nodes) × (vCPU per node) - (number of nodes) × 0.5 - (has Self-hosted logging) × 1 - (has Self-hosted monitoring) × 1.4 - 0.1 - 0.7 (Central monitoring agent per every cluster) - 0.3 (Central logging agent per every cluster).
User wants to create a Kublr-Kubernetes cluster with 5 n1-standard-4 nodes (in Google Cloud Platform) with enabled self-hosted logging, but disabled self-hosted monitoring, then:
Note: You will use centralized monitoring available in the Kublr Platform instead of self-hosted monitoring
Questions? Suggestions? Need help? Contact us.