System requirements#
These are the k0s system requirements.
Hardware#
The following table shows the minimum HW requirements. All values are approximations and results may vary.
| Role | Virtual CPU (vCPU) | Memory (RAM) |
|---|---|---|
| Controller node | 1 vCPU (2 recommended) | 1 GB (2 recommended) |
| Worker node | 1 vCPU (2 recommended) | 1 GB (2 recommended) |
| Controller + worker | 1 vCPU (2 recommended) | 1 GB (2 recommended) |
For optimal storage performance we recommend using an SSD disk. Cluster latency and throughput are sensitive to storage: https://etcd.io/docs/current/op-guide/performance/
k0s part of the storage consumption is presented in the following table. Note that the operating system and application requirements must be added on top.
| Role | Storage (k0s part) |
|---|---|
| Controller node | ~0.5 GB |
| Worker node | ~1.3 GB |
| Controller + worker | ~1.7 GB |
Host operating system#
- Linux (kernel v3.10 or newer)
- Windows Server 2019
Architecture#
- Intel (x86-64)
- ARM (ARM64)
Networking#
See networking for the needed open ports.