Pods, Deployments, StatefulSets, DaemonSets, Jobs, probes, resource limits, taints, tolerations and affinity.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What is the smallest deployable unit in Kubernetes?
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A Pod- Can multiple containers in the same Pod share the network namespace?
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Yes, they share a single IP address and communicate via localhost- What happens to other containers in a Pod if one container crashes?
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They continue running; a crashed container does not automatically restart the Pod- How do containers communicate within the same Pod?
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Via localhost using the individual container port numbers- What Kubernetes object manages replicated Pods and enables rolling updates?
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Deployment- Does a Deployment directly manage Pods?
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No, it creates and manages ReplicaSets, which manage Pods- What is the default update strategy for a Deployment?
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Rolling update, where Pods are gradually replaced- How do you scale a Deployment to a specific number of replicas?
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Set spec.replicas in the manifest or use kubectl scale- What is the primary difference between a StatefulSet and a Deployment?
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StatefulSet maintains a sticky identity for each Pod with predictable naming and order; Deployment treats Pods as interchangeable- What does a StatefulSet provide that a Deployment does not?
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Stable network identity and stable persistent storage for each Pod- How are Pods in a StatefulSet named and identified?
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By an ordinal index appended to the StatefulSet name, e.g., mysql-0, mysql-1, mysql-2- What is the purpose of a Headless Service with a StatefulSet?
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To provide DNS names for individual Pods without load balancing- What does a DaemonSet ensure?
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One Pod runs on every Node in the cluster (or every Node matching a nodeSelector)- What is a common use case for a DaemonSet?
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Running system daemons like monitoring agents, log collectors, or networking plugins- What happens to a DaemonSet Pod when a Node is cordoned?
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The Pod is evicted unless it has a matching toleration for the node.kubernetes.io/unschedulable taint
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