DaemonSet Capacity Calculator
Estimate total cluster-wide resource consumption of a DaemonSet across all nodes.
About DaemonSet Capacity Calculator
A DaemonSet always schedules exactly one pod per eligible node, so its total resource footprint scales linearly with cluster size rather than with traffic or workload demand. This makes DaemonSets (CNI plugins, log shippers, node monitoring agents) a fixed tax on every node's capacity — one that grows automatically whenever the cluster autoscaler adds nodes, and should be netted out before sizing pod density for regular workloads.
Formulas
Total DaemonSet CPU
totalCPU = nodeCount × perPodCPU
- N
- Number of nodes in the cluster
- C_p
- Per-pod CPU request in millicores
- T_c
- Total DaemonSet CPU across cluster in millicores
Total DaemonSet memory
totalMemory = nodeCount × perPodMemory
- N
- Number of nodes in the cluster
- M_p
- Per-pod memory request in MiB
- T_m
- Total DaemonSet memory across cluster in MiB
Worked example
With the default values below, DaemonSet Capacity Calculator returns Total Cluster CPU (DaemonSet) of 2.00. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Node Countaccepts 1–100,000 nodes
- 20 nodes
- Per-Pod CPU Requestaccepts 0–64,000 millicores
- 100 millicores
- Per-Pod Memory Requestaccepts 0–1,000,000 MiB
- 128 MiB
Results
- Total Cluster CPU (DaemonSet)
- 2.00 cores
- Total Cluster Memory (DaemonSet)
- 2.50 GiB
- Total CPU
- 2,000 millicores
- Total Memory
- 2,560 MiB
Step by step
- 1Total CPU = nodes × per-pod CPU= 2000m (2.00 cores)
- 2Total memory = nodes × per-pod memory= 2560MiB (2.50 GiB)
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
Why does DaemonSet resource usage scale with nodes, not pods?
By design a DaemonSet controller ensures exactly one copy of the pod runs on every node matching its selector — adding more nodes automatically adds more DaemonSet pods, regardless of application-level traffic or replica counts.
How many DaemonSets does a typical cluster run?
Commonly 3-6: a CNI agent, kube-proxy, a log shipper (Fluent Bit/Fluentd), a node-level metrics exporter (node-exporter), and sometimes a security or service mesh agent.
How should I account for this when sizing regular workload capacity?
Subtract the per-node DaemonSet CPU/memory footprint from allocatable node capacity before running the pod density calculator for your application pods, since that capacity is unavailable regardless of scheduling.