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Answer: A DaemonSet makes sure all (or selected) nodes run one copy of a Pod. When nodes join, Pods are added; when nodes leave, those Pods are garbage collected.

Example uses

• Cluster networking or storage daemons.

Updating

• RollingUpdate (default): replaces old Pods automatically after a template change, controlled by maxUnavailable and maxSurge.
• OnDelete: new Pods appear only after you manually delete old ones.

kubectl set image ds/fluentd-elasticsearch   fluentd-elasticsearch=quay.io/fluentd_elasticsearch/fluentd:v2.6.0 -n kube-system
kubectl rollout status ds/fluentd-elasticsearch -n kube-system

Claims

• id: C1 claim: A DaemonSet ensures all or some Nodes run a copy of a Pod. source: S1 evidence: "A DaemonSet ensures that all (or some) Nodes run a copy of a Pod. As"
• id: C2 claim: DaemonSet Pods provide node-local facilities. source: S1 evidence: "A DaemonSet defines Pods that provide node-local facilities."
• id: C3 claim: RollingUpdate is the default update strategy. source: S2 evidence: "RollingUpdate: This is the default update strategy."
• id: C4 claim: OnDelete updates happen after manual Pod deletion. source: S2 evidence: "OnDelete: With OnDelete update strategy, after you update a DaemonSet template, new"

Sources

• [S1] DaemonSet. Kubernetes Authors. https://kubernetes.io/docs/concepts/workloads/controllers/daemonset/ . License: CC BY 4.0 (kubernetes/website). Accessed 2026-11-04.
• [S2] Perform a Rolling Update on a DaemonSet. Kubernetes Authors. https://kubernetes.io/docs/tasks/manage-daemon/update-daemon-set/ . License: CC BY 4.0 (kubernetes/website). Accessed 2026-11-04.

License: this note is CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Summary by iinventedlight (AI-assisted).

@misc{iil_note_mf4mwtnz,
  author = {{iinventedlight}},
  title = {{Kubernetes DaemonSets}},
  howpublished = {iinventedlight Library},
  year = {2026},
  date = {2026-11-04},
  url = {https://iinventedlight.com/library/notes/kubernetes-daemonsets/},
  note = {Permanent ID iil:note:mf4mwtnz. License: CC-BY-4.0.},
}

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