Quick Answer
The answer is `/var/lib/etcd`. For a kubeadm-created cluster, etcd runs as a static Pod, and its data directory is mounted directly from the host path `/var/lib/etcd`; this is the default location where etcd stores all cluster state and configuration data. On the Certified Kubernetes Administrator CKA exam, this path is critical for backup and restore tasks, and a common trap is confusing it with the etcd configuration file location or the kubeadm manifest directory. The exam tests your understanding that kubeadm’s static Pod definition explicitly mounts this host path into the etcd container, making it the definitive data store. A useful memory tip: think of “lib” as the library of cluster state, and remember that etcd’s data lives under `/var/lib`, not under `/etc/kubernetes`.
This CKA practice question tests your understanding of cluster architecture, installation and configuration. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You need to back up the etcd database for a kubeadm-created cluster. Which directory contains the etcd data?
/etc/kubernetes/pki/etcd
Why wrong: Contains certificates, not data.
/var/lib/etcd
Default etcd data directory.
/var/lib/kubelet
Why wrong: Contains kubelet data.
/etc/etcd
Why wrong: Contains configuration, not data.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
/var/lib/etcd
For a kubeadm-created cluster, etcd runs as a static Pod, and its data directory is mounted from the host path `/var/lib/etcd`. This is the default data directory used by etcd when started via kubeadm, and it stores all cluster state and configuration data. The CKA exam expects you to know this path for backup and restore operations.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
/etc/kubernetes/pki/etcd
Why it's wrong here
Contains certificates, not data.
/var/lib/etcd
Why this is correct
Default etcd data directory.
Related concept
Read the scenario before looking for a memorised answer.
/var/lib/kubelet
Why it's wrong here
Contains kubelet data.
/etc/etcd
Why it's wrong here
Contains configuration, not data.
Common exam traps
The trap here is that candidates confuse the etcd data directory with the certificate directory (`/etc/kubernetes/pki/etcd`) because both are etcd-related and located under `/etc/kubernetes`, but only the data directory holds the actual database files.
Detailed technical explanation
The etcd data directory contains the `member/` subdirectory with the WAL (Write-Ahead Log) and snapshot files, which are critical for point-in-time recovery. When performing a backup, you typically use `etcdctl snapshot save` and specify the `--data-dir` flag, but the default data directory for kubeadm-managed etcd is `/var/lib/etcd`. Understanding this path is essential because restoring from a snapshot requires stopping the etcd Pod, replacing the contents of `/var/lib/etcd` with the restored data, and restarting the Pod.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
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FAQ
Cluster Architecture, Installation and Configuration — This question tests Cluster Architecture, Installation and Configuration — Read the scenario before looking for a memorised answer..
The correct answer is: /var/lib/etcd — For a kubeadm-created cluster, etcd runs as a static Pod, and its data directory is mounted from the host path `/var/lib/etcd`. This is the default data directory used by etcd when started via kubeadm, and it stores all cluster state and configuration data. The CKA exam expects you to know this path for backup and restore operations.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This CKA practice question is part of Courseiva's free CNCF certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CKA exam.
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