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docs: updated docs for current cka track. exam on Sat.

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vumast3r 2026-09-16 19:48:09 -06:00
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{"at": "2026-09-12T22:17", "mode": "drill", "hard": false, "ids": [1, 6, 21, 34, 41], "score_pct": 87.5, "earned": 21, "total": 24, "time_used": 534, "pauses": 1, "paused_seconds": 40270, "results": {"1": {"pass": true, "earned": 6, "total": 6, "failed": []}, "6": {"pass": false, "earned": 3, "total": 6, "failed": ["CSR jane exists with signer kubernetes.io/kube-apiserver-client", "CSR jane approved and certificate issued"]}, "21": {"pass": true, "earned": 4, "total": 4, "failed": []}, "34": {"pass": true, "earned": 4, "total": 4, "failed": []}, "41": {"pass": true, "earned": 4, "total": 4, "failed": []}}} {"at": "2026-09-12T22:17", "mode": "drill", "hard": false, "ids": [1, 6, 21, 34, 41], "score_pct": 87.5, "earned": 21, "total": 24, "time_used": 534, "pauses": 1, "paused_seconds": 40270, "results": {"1": {"pass": true, "earned": 6, "total": 6, "failed": []}, "6": {"pass": false, "earned": 3, "total": 6, "failed": ["CSR jane exists with signer kubernetes.io/kube-apiserver-client", "CSR jane approved and certificate issued"]}, "21": {"pass": true, "earned": 4, "total": 4, "failed": []}, "34": {"pass": true, "earned": 4, "total": 4, "failed": []}, "41": {"pass": true, "earned": 4, "total": 4, "failed": []}}}
{"at": "2026-09-12T22:59", "mode": "drill", "hard": false, "ids": [17, 19, 37, 38, 39], "score_pct": 29.4, "earned": 10, "total": 34, "time_used": 1987, "pauses": 0, "paused_seconds": 0, "results": {"17": {"pass": false, "earned": 4, "total": 8, "failed": ["kubelet is active", "kubelet is enabled (survives reboot)"]}, "19": {"pass": false, "earned": 1, "total": 6, "failed": ["crasher.log captured and contains the DB_HOST failure", "pod crasher Running with DB_HOST set"]}, "37": {"pass": false, "earned": 1, "total": 6, "failed": ["CoreDNS Corefile forwards to the node resolver again", "in-cluster and external names resolve from a pod"]}, "38": {"pass": false, "earned": 0, "total": 7, "failed": ["kube-controller-manager manifest repaired and pod Running", "a new Deployment gets a ReplicaSet and running pods"]}, "39": {"pass": false, "earned": 4, "total": 7, "failed": ["kubelet config points at a CA file that exists", "kubelet active and enabled"]}}} {"at": "2026-09-12T22:59", "mode": "drill", "hard": false, "ids": [17, 19, 37, 38, 39], "score_pct": 29.4, "earned": 10, "total": 34, "time_used": 1987, "pauses": 0, "paused_seconds": 0, "results": {"17": {"pass": false, "earned": 4, "total": 8, "failed": ["kubelet is active", "kubelet is enabled (survives reboot)"]}, "19": {"pass": false, "earned": 1, "total": 6, "failed": ["crasher.log captured and contains the DB_HOST failure", "pod crasher Running with DB_HOST set"]}, "37": {"pass": false, "earned": 1, "total": 6, "failed": ["CoreDNS Corefile forwards to the node resolver again", "in-cluster and external names resolve from a pod"]}, "38": {"pass": false, "earned": 0, "total": 7, "failed": ["kube-controller-manager manifest repaired and pod Running", "a new Deployment gets a ReplicaSet and running pods"]}, "39": {"pass": false, "earned": 4, "total": 7, "failed": ["kubelet config points at a CA file that exists", "kubelet active and enabled"]}}}
{"at": "2026-09-13T01:06", "mode": "drill", "hard": false, "ids": [17, 19, 37, 38, 39], "score_pct": 29.4, "earned": 10, "total": 34, "time_used": 6649, "pauses": 0, "paused_seconds": 0, "results": {"17": {"pass": false, "earned": 4, "total": 8, "failed": ["kubelet is active", "kubelet is enabled (survives reboot)"]}, "19": {"pass": false, "earned": 1, "total": 6, "failed": ["crasher.log captured and contains the DB_HOST failure", "pod crasher Running with DB_HOST set"]}, "37": {"pass": false, "earned": 1, "total": 6, "failed": ["CoreDNS Corefile forwards to the node resolver again", "in-cluster and external names resolve from a pod"]}, "38": {"pass": false, "earned": 0, "total": 7, "failed": ["kube-controller-manager manifest repaired and pod Running", "a new Deployment gets a ReplicaSet and running pods"]}, "39": {"pass": false, "earned": 4, "total": 7, "failed": ["kubelet config points at a CA file that exists", "kubelet active and enabled"]}}} {"at": "2026-09-13T01:06", "mode": "drill", "hard": false, "ids": [17, 19, 37, 38, 39], "score_pct": 29.4, "earned": 10, "total": 34, "time_used": 6649, "pauses": 0, "paused_seconds": 0, "results": {"17": {"pass": false, "earned": 4, "total": 8, "failed": ["kubelet is active", "kubelet is enabled (survives reboot)"]}, "19": {"pass": false, "earned": 1, "total": 6, "failed": ["crasher.log captured and contains the DB_HOST failure", "pod crasher Running with DB_HOST set"]}, "37": {"pass": false, "earned": 1, "total": 6, "failed": ["CoreDNS Corefile forwards to the node resolver again", "in-cluster and external names resolve from a pod"]}, "38": {"pass": false, "earned": 0, "total": 7, "failed": ["kube-controller-manager manifest repaired and pod Running", "a new Deployment gets a ReplicaSet and running pods"]}, "39": {"pass": false, "earned": 4, "total": 7, "failed": ["kubelet config points at a CA file that exists", "kubelet active and enabled"]}}}
{"at": "2026-09-14T16:49", "mode": "drill", "hard": false, "ids": [3, 5, 6, 8, 12, 13, 15, 16, 17, 18, 19, 20, 25, 28, 29, 30, 33, 37, 38, 39, 40, 42, 106, 112, 115, 120, 121], "score_pct": 42.0, "earned": 63, "total": 150, "time_used": 510, "pauses": 2, "paused_seconds": 87534, "results": {"17": {"pass": true, "earned": 8, "total": 8, "failed": []}, "20": {"pass": true, "earned": 8, "total": 8, "failed": []}, "3": {"pass": true, "earned": 5, "total": 5, "failed": []}, "5": {"pass": true, "earned": 5, "total": 5, "failed": []}, "8": {"pass": true, "earned": 4, "total": 4, "failed": []}, "12": {"pass": true, "earned": 4, "total": 4, "failed": []}, "38": {"pass": true, "earned": 7, "total": 7, "failed": []}, "18": {"pass": true, "earned": 7, "total": 7, "failed": []}, "19": {"pass": false, "earned": 4, "total": 6, "failed": ["crasher.log captured and contains the DB_HOST failure"]}, "6": {"pass": true, "earned": 6, "total": 6, "failed": []}, "13": {"pass": false, "earned": 0, "total": 5, "failed": ["ingressClassName nginx and host shop.example.com", "/api (Prefix) -> api:8080", "/ (Prefix) -> web:80"]}, "15": {"pass": false, "earned": 0, "total": 6, "failed": ["PV pv-data: 1Gi hostPath /mnt/data, RWO, Retain, class manual", "PVC pvc-data Bound to pv-data", "data-pod Running with claim mounted at /usr/share/data"]}, "16": {"pass": false, "earned": 0, "total": 5, "failed": ["StorageClass fast-local: local-path, WaitForFirstConsumer, Delete", "fast-local is default and standard is not", "fast-claim picked up fast-local and is Bound", "fast-pod Running with claim at /data"]}, "25": {"pass": false, "earned": 0, "total": 4, "failed": ["cka-sim-worker carries workload=batch:NoSchedule", "deployment tolerates the taint", "both pods Running on cka-sim-worker"]}, "28": {"pass": false, "earned": 0, "total": 4, "failed": ["pod Running, init container named setup completed", "emptyDir 'content' shared by both containers", "nginx serves the init-written content"]}, "29": {"pass": false, "earned": 1, "total": 4, "failed": ["deployment now references a different ConfigMap", "all pods available and see mode=new"]}, "30": {"pass": false, "earned": 0, "total": 4, "failed": ["container port 80 named svc-http", "Service port 8080 -> targetPort svc-http (by name)", "readiness probe uses the named port; endpoints ready"]}, "33": {"pass": false, "earned": 1, "total": 5, "failed": ["ops-19 has an aggregationRule with the right label", "aggregation populated rules from the two labelled roles", "sam can list pods and services cluster-wide"]}, "37": {"pass": false, "earned": 1, "total": 6, "failed": ["CoreDNS Corefile forwards to the node resolver again", "in-cluster and external names resolve from a pod"]}, "39": {"pass": false, "earned": 0, "total": 7, "failed": ["kubelet config points at a CA file that exists", "node Ready", "kubelet active and enabled"]}, "40": {"pass": false, "earned": 0, "total": 5, "failed": ["join.sh contains a kubeadm join with token and CA hash", "the token in the file exists in the cluster with TTL ~2h"]}, "42": {"pass": false, "earned": 0, "total": 4, "failed": ["applies to app=client-64, Egress only", "DNS rule: kube-system namespace + k8s-app=kube-dns, ports 53 UDP and TCP", "TCP 443 to 172.16.0.0/16 only"]}, "106": {"pass": false, "earned": 0, "total": 7, "failed": ["CRD exists, Namespaced, replicas has min/max and is required", "good created with environment prod", "replicas 0 is rejected and the message was saved", "defaulting works: defaulted.spec.environment == dev"]}, "112": {"pass": false, "earned": 0, "total": 7, "failed": ["Secret admin.lab.local-tls is kubernetes.io/tls with CN admin.lab.local", "Ingress web: class nginx, host, TLS secret, ssl-redirect annotation", "fp.txt matches the secret's certificate fingerprint"]}, "115": {"pass": false, "earned": 1, "total": 6, "failed": ["PVC uses a selector and is Bound to lv-nvme", "consumer Running on the nvme node with /data mounted"]}, "120": {"pass": false, "earned": 0, "total": 5, "failed": ["pod-cidr and service-cidr", "dns-ip and proxy-mode", "cka-sim-worker3 pod CIDR"]}, "121": {"pass": false, "earned": 1, "total": 6, "failed": ["Deployment ledger-73 in ac-bravo (the context's namespace), 2 available, owner=ac", "Service ledger-73 port 9000 in the same namespace", "ns.txt has the namespace"]}}}
{"at": "2026-09-15T20:55", "mode": "drill", "hard": false, "ids": [13, 15, 16, 19, 25, 28, 29, 30, 33, 37, 39, 40, 42, 106, 112, 115, 120, 121], "score_pct": 41.7, "earned": 40, "total": 96, "time_used": 608, "pauses": 1, "paused_seconds": 100482, "results": {"13": {"pass": true, "earned": 5, "total": 5, "failed": []}, "19": {"pass": true, "earned": 6, "total": 6, "failed": []}, "33": {"pass": true, "earned": 5, "total": 5, "failed": []}, "30": {"pass": true, "earned": 4, "total": 4, "failed": []}, "37": {"pass": true, "earned": 6, "total": 6, "failed": []}, "39": {"pass": true, "earned": 7, "total": 7, "failed": []}, "40": {"pass": false, "earned": 0, "total": 5, "failed": ["join.sh contains a kubeadm join with token and CA hash", "the token in the file exists in the cluster with TTL ~6h"]}, "42": {"pass": true, "earned": 4, "total": 4, "failed": []}, "15": {"pass": false, "earned": 0, "total": 6, "failed": ["PV pv-data: 1Gi hostPath /mnt/data, RWO, Retain, class manual", "PVC pvc-data Bound to pv-data", "data-pod Running with claim mounted at /usr/share/data"]}, "16": {"pass": false, "earned": 0, "total": 5, "failed": ["StorageClass fast-local: local-path, WaitForFirstConsumer, Delete", "fast-local is default and standard is not", "fast-claim picked up fast-local and is Bound", "fast-pod Running with claim at /data"]}, "25": {"pass": false, "earned": 0, "total": 4, "failed": ["cka-sim-worker carries team=finance:NoSchedule", "deployment tolerates the taint", "both pods Running on cka-sim-worker"]}, "28": {"pass": false, "earned": 0, "total": 4, "failed": ["pod Running, init container named setup completed", "emptyDir 'content' shared by both containers", "nginx serves the init-written content"]}, "29": {"pass": false, "earned": 1, "total": 4, "failed": ["deployment now references a different ConfigMap", "all pods available and see mode=new"]}, "106": {"pass": false, "earned": 0, "total": 7, "failed": ["CRD exists, Namespaced, replicas has min/max and is required", "good created with environment prod", "replicas 0 is rejected and the message was saved", "defaulting works: defaulted.spec.environment == dev"]}, "112": {"pass": false, "earned": 0, "total": 7, "failed": ["Secret portal.lab.local-tls is kubernetes.io/tls with CN portal.lab.local", "Ingress web: class nginx, host, TLS secret, ssl-redirect annotation", "fp.txt matches the secret's certificate fingerprint"]}, "115": {"pass": false, "earned": 1, "total": 6, "failed": ["PVC uses a selector and is Bound to lv-nvme", "consumer Running on the nvme node with /data mounted"]}, "120": {"pass": false, "earned": 0, "total": 5, "failed": ["pod-cidr and service-cidr", "dns-ip and proxy-mode", "cka-sim-worker3 pod CIDR"]}, "121": {"pass": false, "earned": 1, "total": 6, "failed": ["Deployment ledger-21 in ac-echo (the context's namespace), 2 available, owner=ac", "Service ledger-21 port 9000 in the same namespace", "ns.txt has the namespace"]}}}
{"at": "2026-09-16T19:40", "mode": "drill", "hard": false, "ids": [15, 16, 25, 28, 29, 40], "score_pct": 50.0, "earned": 14, "total": 28, "time_used": 1258, "pauses": 3, "paused_seconds": 80587, "results": {"15": {"pass": true, "earned": 6, "total": 6, "failed": []}, "25": {"pass": true, "earned": 4, "total": 4, "failed": []}, "29": {"pass": true, "earned": 4, "total": 4, "failed": []}, "16": {"pass": false, "earned": 0, "total": 5, "failed": ["StorageClass fast-local: local-path, WaitForFirstConsumer, Delete", "fast-local is default and standard is not", "fast-claim picked up fast-local and is Bound", "fast-pod Running with claim at /data"]}, "28": {"pass": false, "earned": 0, "total": 4, "failed": ["pod Running, init container named setup completed", "emptyDir 'content' shared by both containers", "nginx serves the init-written content"]}, "40": {"pass": false, "earned": 0, "total": 5, "failed": ["join.sh contains a kubeadm join with token and CA hash", "the token in the file exists in the cluster with TTL ~24h"]}}}

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# CKA weak spots # CKA weak spots
_Generated by exam from 6 attempt(s); regenerated on every `end`._ _Generated by exam from 9 attempt(s); regenerated on every `end`._
## Domain scores (latest full exam, 2026-09-08T19:59, 14.3%) ## Domain scores (latest full exam, 2026-09-08T19:59, 14.3%)
@ -12,238 +12,208 @@ _Generated by exam from 6 attempt(s); regenerated on every `end`._
## Drill next (`./exam drill weak`) ## Drill next (`./exam drill weak`)
### Q03 · ARCH · Kustomize overlay (1/1 failed, last 0/5 pts, 2026-09-08T19:59) ### Q06 · ARCH · Certificates: expiry check and user CSR (2/3 failed, last 6/6 pts, 2026-09-12T22:17)
- ✗ overlay kustomization.yaml exists
- ✗ resources deployed into namespace store-prod
- ✗ store-api has 3 replicas
- ✗ Deployment and Service carry label env=prod
### Q05 · ARCH · Static pod (1/1 failed, last 0/5 pts, 2026-09-06T22:07)
- ✗ manifest containing static-web is in /etc/kubernetes/manifests on the node
- ✗ mirror pod static-web-<node> is Running
- ✗ image is nginx:1.27
### Q06 · ARCH · Certificates: expiry check and user CSR (2/2 failed, last 3/6 pts, 2026-09-12T22:17)
- ✗ CSR jane exists with signer kubernetes.io/kube-apiserver-client - ✗ CSR jane exists with signer kubernetes.io/kube-apiserver-client
- ✗ CSR jane approved and certificate issued - ✗ CSR jane approved and certificate issued
### Q08 · WORK · Multi-container pod with shared volume (1/1 failed, last 0/4 pts, 2026-09-08T19:59) ### Q13 · NET · Ingress routing (2/3 failed, last 5/5 pts, 2026-09-14T16:49)
- ✗ pod log-shipper Running with containers app and shipper
- ✗ volume logs is an emptyDir mounted at /var/log in both containers
- ✗ shipper's logs show lines written by app
### Q12 · NET · NodePort Service (1/1 failed, last 0/4 pts, 2026-09-08T19:59)
- ✗ Service shop-svc is NodePort, port 80 -> targetPort 80
- ✗ nodePort is 30080
- ✗ Service has endpoints
### Q13 · NET · Ingress routing (1/1 failed, last 0/5 pts, 2026-09-08T19:59)
- ✗ ingressClassName nginx and host shop.example.com - ✗ ingressClassName nginx and host shop.example.com
- ✗ /api (Prefix) -> api:8080 - ✗ /api (Prefix) -> api:8080
- ✗ / (Prefix) -> web:80 - ✗ / (Prefix) -> web:80
### Q15 · STOR · PersistentVolume, claim and pod (1/1 failed, last 0/6 pts, 2026-09-08T19:59) ### Q15 · STOR · PersistentVolume, claim and pod (3/4 failed, last 6/6 pts, 2026-09-15T20:55)
- ✗ PV pv-data: 1Gi hostPath /mnt/data, RWO, Retain, class manual - ✗ PV pv-data: 1Gi hostPath /mnt/data, RWO, Retain, class manual
- ✗ PVC pvc-data Bound to pv-data - ✗ PVC pvc-data Bound to pv-data
- ✗ data-pod Running with claim mounted at /usr/share/data - ✗ data-pod Running with claim mounted at /usr/share/data
### Q16 · STOR · Default StorageClass and dynamic provisioning (1/1 failed, last 0/5 pts, 2026-09-08T19:59) ### Q16 · STOR · Default StorageClass and dynamic provisioning (4/4 failed, last 0/5 pts, 2026-09-16T19:40)
- ✗ StorageClass fast-local: local-path, WaitForFirstConsumer, Delete - ✗ StorageClass fast-local: local-path, WaitForFirstConsumer, Delete
- ✗ fast-local is default and standard is not - ✗ fast-local is default and standard is not
- ✗ fast-claim picked up fast-local and is Bound - ✗ fast-claim picked up fast-local and is Bound
- ✗ fast-pod Running with claim at /data - ✗ fast-pod Running with claim at /data
### Q17 · TSHOOT · Node NotReady (3/3 failed, last 4/8 pts, 2026-09-13T01:06) ### Q17 · TSHOOT · Node NotReady (3/4 failed, last 8/8 pts, 2026-09-13T01:06)
- ✗ kubelet is active - ✗ kubelet is active
- ✗ kubelet is enabled (survives reboot) - ✗ kubelet is enabled (survives reboot)
### Q18 · TSHOOT · Broken deployment and service (1/1 failed, last 0/7 pts, 2026-09-08T19:59) ### Q19 · TSHOOT · CrashLoopBackOff diagnosis (4/5 failed, last 6/6 pts, 2026-09-14T16:49)
- ✗ all payments replicas available
- ✗ Service payments has endpoints (selector fixed)
- ✗ Service targetPort matches container port 80
### Q19 · TSHOOT · CrashLoopBackOff diagnosis (3/3 failed, last 1/6 pts, 2026-09-13T01:06)
- ✗ crasher.log captured and contains the DB_HOST failure - ✗ crasher.log captured and contains the DB_HOST failure
- ✗ pod crasher Running with DB_HOST set
### Q20 · TSHOOT · Control plane component failure (1/1 failed, last 0/8 pts, 2026-09-08T19:59) ### Q25 · WORK · Taints and tolerations (3/4 failed, last 4/4 pts, 2026-09-15T20:55)
- ✗ kube-scheduler static pod manifest repaired - ✗ cka-sim-worker carries team=finance:NoSchedule
- ✗ new pods get scheduled
### Q25 · WORK · Taints and tolerations (1/1 failed, last 0/4 pts, 2026-09-08T19:59)
- ✗ cka-sim-worker carries workload=batch:NoSchedule
- ✗ deployment tolerates the taint - ✗ deployment tolerates the taint
- ✗ both pods Running on cka-sim-worker - ✗ both pods Running on cka-sim-worker
### Q28 · WORK · Init container prepares content (1/1 failed, last 0/4 pts, 2026-09-08T19:59) ### Q28 · WORK · Init container prepares content (4/4 failed, last 0/4 pts, 2026-09-16T19:40)
- ✗ pod Running, init container named setup completed - ✗ pod Running, init container named setup completed
- ✗ emptyDir 'content' shared by both containers - ✗ emptyDir 'content' shared by both containers
- ✗ nginx serves the init-written content - ✗ nginx serves the init-written content
### Q29 · WORK · Immutable ConfigMap rotation (1/1 failed, last 1/4 pts, 2026-09-08T19:59) ### Q29 · WORK · Immutable ConfigMap rotation (3/4 failed, last 4/4 pts, 2026-09-15T20:55)
- ✗ deployment now references a different ConfigMap - ✗ deployment now references a different ConfigMap
- ✗ all pods available and see mode=new - ✗ all pods available and see mode=new
### Q30 · NET · Named ports (1/1 failed, last 0/4 pts, 2026-09-08T19:59) ### Q30 · NET · Named ports (2/3 failed, last 4/4 pts, 2026-09-14T16:49)
- ✗ container port 80 named app-port - ✗ container port 80 named svc-http
- ✗ Service port 8080 -> targetPort app-port (by name) - ✗ Service port 8080 -> targetPort svc-http (by name)
- ✗ readiness probe uses the named port; endpoints ready - ✗ readiness probe uses the named port; endpoints ready
### Q33 · ARCH · Aggregated ClusterRole (1/1 failed, last 1/5 pts, 2026-09-08T19:59) ### Q33 · ARCH · Aggregated ClusterRole (2/3 failed, last 5/5 pts, 2026-09-14T16:49)
- ✗ ops-44 has an aggregationRule with the right label - ✗ ops-19 has an aggregationRule with the right label
- ✗ aggregation populated rules from the two labelled roles - ✗ aggregation populated rules from the two labelled roles
- ✗ lee can list pods and services cluster-wide - ✗ sam can list pods and services cluster-wide
### Q37 · TSHOOT · Cluster DNS is broken (3/3 failed, last 1/6 pts, 2026-09-13T01:06) ### Q37 · TSHOOT · Cluster DNS is broken (4/5 failed, last 6/6 pts, 2026-09-14T16:49)
- ✗ CoreDNS Corefile forwards to the node resolver again - ✗ CoreDNS Corefile forwards to the node resolver again
- ✗ in-cluster and external names resolve from a pod - ✗ in-cluster and external names resolve from a pod
### Q38 · TSHOOT · Deployments never create pods (2/2 failed, last 0/7 pts, 2026-09-13T01:06) ### Q38 · TSHOOT · Deployments never create pods (2/3 failed, last 7/7 pts, 2026-09-13T01:06)
- ✗ kube-controller-manager manifest repaired and pod Running - ✗ kube-controller-manager manifest repaired and pod Running
- ✗ a new Deployment gets a ReplicaSet and running pods - ✗ a new Deployment gets a ReplicaSet and running pods
### Q39 · TSHOOT · kubelet misconfiguration (2/2 failed, last 4/7 pts, 2026-09-13T01:06) ### Q39 · TSHOOT · kubelet misconfiguration (3/4 failed, last 7/7 pts, 2026-09-14T16:49)
- ✗ kubelet config points at a CA file that exists - ✗ kubelet config points at a CA file that exists
- ✗ node Ready
- ✗ kubelet active and enabled - ✗ kubelet active and enabled
### Q40 · ARCH · kubeadm join token (1/1 failed, last 0/5 pts, 2026-09-08T19:59) ### Q40 · ARCH · kubeadm join token (4/4 failed, last 0/5 pts, 2026-09-16T19:40)
- ✗ join.sh contains a kubeadm join with token and CA hash - ✗ join.sh contains a kubeadm join with token and CA hash
- ✗ the token in the file exists in the cluster with TTL ~2h - ✗ the token in the file exists in the cluster with TTL ~24h
### Q42 · NET · Egress-only NetworkPolicy (1/1 failed, last 0/4 pts, 2026-09-08T19:59) ### Q42 · NET · Egress-only NetworkPolicy (2/3 failed, last 4/4 pts, 2026-09-14T16:49)
- ✗ applies to app=client-47, Egress only - ✗ applies to app=client-64, Egress only
- ✗ DNS rule: kube-system namespace + k8s-app=kube-dns, ports 53 UDP and TCP - ✗ DNS rule: kube-system namespace + k8s-app=kube-dns, ports 53 UDP and TCP
- ✗ TCP 443 to 192.168.100.0/24 only - ✗ TCP 443 to 172.16.0.0/16 only
### Q106 · ARCH · CRD with validation and defaults (1/1 failed, last 0/7 pts, 2026-09-10T21:07) ### Q106 · ARCH · CRD with validation and defaults (3/3 failed, last 0/7 pts, 2026-09-15T20:55)
- ✗ CRD exists, Namespaced, replicas has min/max and is required - ✗ CRD exists, Namespaced, replicas has min/max and is required
- ✗ good created with environment prod - ✗ good created with environment prod
- ✗ replicas 0 is rejected and the message was saved - ✗ replicas 0 is rejected and the message was saved
- ✗ defaulting works: defaulted.spec.environment == dev - ✗ defaulting works: defaulted.spec.environment == dev
### Q112 · NET · TLS Ingress with a generated certificate (1/1 failed, last 0/7 pts, 2026-09-10T21:07) ### Q112 · NET · TLS Ingress with a generated certificate (3/3 failed, last 0/7 pts, 2026-09-15T20:55)
- ✗ Secret portal.lab.local-tls is kubernetes.io/tls with CN portal.lab.local - ✗ Secret portal.lab.local-tls is kubernetes.io/tls with CN portal.lab.local
- ✗ Ingress web: class nginx, host, TLS secret, ssl-redirect annotation - ✗ Ingress web: class nginx, host, TLS secret, ssl-redirect annotation
- ✗ fp.txt matches the secret's certificate fingerprint - ✗ fp.txt matches the secret's certificate fingerprint
### Q115 · STOR · Bind the right local volume (1/1 failed, last 1/6 pts, 2026-09-10T21:07) ### Q115 · STOR · Bind the right local volume (3/3 failed, last 1/6 pts, 2026-09-15T20:55)
- ✗ PVC uses a selector and is Bound to lv-nvme - ✗ PVC uses a selector and is Bound to lv-nvme
- ✗ consumer Running on the nvme node with /data mounted - ✗ consumer Running on the nvme node with /data mounted
### Q120 · TSHOOT · Cluster facts, exactly (1/1 failed, last 0/5 pts, 2026-09-10T21:07) ### Q120 · TSHOOT · Cluster facts, exactly (3/3 failed, last 0/5 pts, 2026-09-15T20:55)
- ✗ pod-cidr and service-cidr - ✗ pod-cidr and service-cidr
- ✗ dns-ip and proxy-mode - ✗ dns-ip and proxy-mode
- ✗ cka-sim-worker3 pod CIDR - ✗ cka-sim-worker3 pod CIDR
### Q121 · WORK · The context's namespace (1/1 failed, last 1/6 pts, 2026-09-10T21:07) ### Q121 · WORK · The context's namespace (3/3 failed, last 1/6 pts, 2026-09-15T20:55)
- ✗ Deployment ledger-14 in ac-omega (the context's namespace), 2 available, owner=ac - ✗ Deployment ledger-21 in ac-echo (the context's namespace), 2 available, owner=ac
- ✗ Service ledger-14 port 9000 in the same namespace - ✗ Service ledger-21 port 9000 in the same namespace
- ✗ ns.txt has the namespace - ✗ ns.txt has the namespace
## Attempt matrix ## Attempt matrix
| Q | Domain | Title | D1 | E2 | D3 | D4 | D5 | D6 | | Q | Domain | Title | D1 | E2 | D3 | D4 | D5 | D6 | D7 | D8 | D9 |
|---|---|---|---|---|---|---|---|---| |---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | ARCH | RBAC for a deployment bot | 2/6 | · | · | ✓ | · | · | | 1 | ARCH | RBAC for a deployment bot | 2/6 | · | · | ✓ | · | · | · | · | · |
| 2 | ARCH | etcd snapshot | · | ✓ | · | · | · | · | | 2 | ARCH | etcd snapshot | · | ✓ | · | · | · | · | · | · | · |
| 3 | ARCH | Kustomize overlay | · | 0/5 | · | · | · | · | | 3 | ARCH | Kustomize overlay | · | 0/5 | · | · | · | · | ✓ | · | · |
| 4 | ARCH | CustomResourceDefinition | · | ✓ | · | · | · | · | | 4 | ARCH | CustomResourceDefinition | · | ✓ | · | · | · | · | · | · | · |
| 5 | ARCH | Static pod | 0/5 | · | · | · | · | · | | 5 | ARCH | Static pod | 0/5 | · | · | · | · | · | ✓ | · | · |
| 6 | ARCH | Certificates: expiry check and user CSR | 0/6 | · | · | 3/6 | · | · | | 6 | ARCH | Certificates: expiry check and user CSR | 0/6 | · | · | 3/6 | · | · | ✓ | · | · |
| 7 | WORK | Rolling update & scaling | · | · | · | · | · | · | | 7 | WORK | Rolling update & scaling | · | · | · | · | · | · | · | · | · |
| 8 | WORK | Multi-container pod with shared volume | · | 0/4 | · | · | · | · | | 8 | WORK | Multi-container pod with shared volume | · | 0/4 | · | · | · | · | ✓ | · | · |
| 9 | WORK | Scheduling with node affinity and resources | · | · | · | · | · | · | | 9 | WORK | Scheduling with node affinity and resources | · | · | · | · | · | · | · | · | · |
| 10 | WORK | ConfigMap and Secret consumption | · | · | · | · | · | · | | 10 | WORK | ConfigMap and Secret consumption | · | · | · | · | · | · | · | · | · |
| 11 | NET | NetworkPolicy | · | · | · | · | · | · | | 11 | NET | NetworkPolicy | · | · | · | · | · | · | · | · | · |
| 12 | NET | NodePort Service | · | 0/4 | · | · | · | · | | 12 | NET | NodePort Service | · | 0/4 | · | · | · | · | ✓ | · | · |
| 13 | NET | Ingress routing | · | 0/5 | · | · | · | · | | 13 | NET | Ingress routing | · | 0/5 | · | · | · | · | 0/5 | ✓ | · |
| 14 | NET | Cluster DNS | · | · | · | · | · | · | | 14 | NET | Cluster DNS | · | · | · | · | · | · | · | · | · |
| 15 | STOR | PersistentVolume, claim and pod | · | 0/6 | · | · | · | · | | 15 | STOR | PersistentVolume, claim and pod | · | 0/6 | · | · | · | · | 0/6 | 0/6 | ✓ |
| 16 | STOR | Default StorageClass and dynamic provisioning | · | 0/5 | · | · | · | · | | 16 | STOR | Default StorageClass and dynamic provisioning | · | 0/5 | · | · | · | · | 0/5 | 0/5 | 0/5 |
| 17 | TSHOOT | Node NotReady | · | 0/8 | · | · | 4/8 | 4/8 | | 17 | TSHOOT | Node NotReady | · | 0/8 | · | · | 4/8 | 4/8 | ✓ | · | · |
| 18 | TSHOOT | Broken deployment and service | · | 0/7 | · | · | · | · | | 18 | TSHOOT | Broken deployment and service | · | 0/7 | · | · | · | · | ✓ | · | · |
| 19 | TSHOOT | CrashLoopBackOff diagnosis | · | 1/6 | · | · | 1/6 | 1/6 | | 19 | TSHOOT | CrashLoopBackOff diagnosis | · | 1/6 | · | · | 1/6 | 1/6 | 4/6 | ✓ | · |
| 20 | TSHOOT | Control plane component failure | · | 0/8 | · | · | · | · | | 20 | TSHOOT | Control plane component failure | · | 0/8 | · | · | · | · | ✓ | · | · |
| 21 | ARCH | Helm release install and upgrade | · | · | · | ✓ | · | · | | 21 | ARCH | Helm release install and upgrade | · | · | · | ✓ | · | · | · | · | · |
| 22 | NET | Gateway API HTTPRoute | · | · | · | · | · | · | | 22 | NET | Gateway API HTTPRoute | · | · | · | · | · | · | · | · | · |
| 23 | WORK | metrics-server repair and HPA | · | · | · | · | · | · | | 23 | WORK | metrics-server repair and HPA | · | · | · | · | · | · | · | · | · |
| 24 | WORK | PriorityClass | · | · | · | · | · | · | | 24 | WORK | PriorityClass | · | · | · | · | · | · | · | · | · |
| 25 | WORK | Taints and tolerations | · | 0/4 | · | · | · | · | | 25 | WORK | Taints and tolerations | · | 0/4 | · | · | · | · | 0/4 | 0/4 | ✓ |
| 26 | WORK | DaemonSet on every node | · | · | · | · | · | · | | 26 | WORK | DaemonSet on every node | · | · | · | · | · | · | · | · | · |
| 27 | WORK | CronJob with a manual run | · | · | · | · | · | · | | 27 | WORK | CronJob with a manual run | · | · | · | · | · | · | · | · | · |
| 28 | WORK | Init container prepares content | · | 0/4 | · | · | · | · | | 28 | WORK | Init container prepares content | · | 0/4 | · | · | · | · | 0/4 | 0/4 | 0/4 |
| 29 | WORK | Immutable ConfigMap rotation | · | 1/4 | · | · | · | · | | 29 | WORK | Immutable ConfigMap rotation | · | 1/4 | · | · | · | · | 1/4 | 1/4 | ✓ |
| 30 | NET | Named ports | · | 0/4 | · | · | · | · | | 30 | NET | Named ports | · | 0/4 | · | · | · | · | 0/4 | ✓ | · |
| 31 | WORK | Parallel Job | · | · | · | · | · | · | | 31 | WORK | Parallel Job | · | · | · | · | · | · | · | · | · |
| 32 | WORK | ResourceQuota and LimitRange | · | · | · | · | · | · | | 32 | WORK | ResourceQuota and LimitRange | · | · | · | · | · | · | · | · | · |
| 33 | ARCH | Aggregated ClusterRole | · | 1/5 | · | · | · | · | | 33 | ARCH | Aggregated ClusterRole | · | 1/5 | · | · | · | · | 1/5 | ✓ | · |
| 34 | ARCH | Discover a CRD field with kubectl explain | 0/4 | · | · | ✓ | · | · | | 34 | ARCH | Discover a CRD field with kubectl explain | 0/4 | · | · | ✓ | · | · | · | · | · |
| 35 | STOR | Re-bind a Released PersistentVolume | · | · | · | · | · | · | | 35 | STOR | Re-bind a Released PersistentVolume | · | · | · | · | · | · | · | · | · |
| 36 | STOR | Data survives the pod | · | · | · | · | · | · | | 36 | STOR | Data survives the pod | · | · | · | · | · | · | · | · | · |
| 37 | TSHOOT | Cluster DNS is broken | · | 1/6 | · | · | 1/6 | 1/6 | | 37 | TSHOOT | Cluster DNS is broken | · | 1/6 | · | · | 1/6 | 1/6 | 1/6 | ✓ | · |
| 38 | TSHOOT | Deployments never create pods | · | · | · | · | 0/7 | 0/7 | | 38 | TSHOOT | Deployments never create pods | · | · | · | · | 0/7 | 0/7 | ✓ | · | · |
| 39 | TSHOOT | kubelet misconfiguration | · | · | · | · | 4/7 | 4/7 | | 39 | TSHOOT | kubelet misconfiguration | · | · | · | · | 4/7 | 4/7 | 0/7 | ✓ | · |
| 40 | ARCH | kubeadm join token | · | 0/5 | · | · | · | · | | 40 | ARCH | kubeadm join token | · | 0/5 | · | · | · | · | 0/5 | 0/5 | 0/5 |
| 41 | ARCH | Component versions | 0/4 | · | · | ✓ | · | · | | 41 | ARCH | Component versions | 0/4 | · | · | ✓ | · | · | · | · | · |
| 42 | NET | Egress-only NetworkPolicy | · | 0/4 | · | · | · | · | | 42 | NET | Egress-only NetworkPolicy | · | 0/4 | · | · | · | · | 0/4 | ✓ | · |
| 43 | NET | Headless and ExternalName services | · | · | · | · | · | · | | 43 | NET | Headless and ExternalName services | · | · | · | · | · | · | · | · | · |
| 101 | ARCH | Exact RBAC with an existing over-grant | · | · | · | · | · | · | | 101 | ARCH | Exact RBAC with an existing over-grant | · | · | · | · | · | · | · | · | · |
| 102 | ARCH | etcd restore | · | · | · | · | · | · | | 102 | ARCH | etcd restore | · | · | · | · | · | · | · | · | · |
| 103 | ARCH | Static pod on a relocated manifest path | · | · | · | · | · | · | | 103 | ARCH | Static pod on a relocated manifest path | · | · | · | · | · | · | · | · | · |
| 104 | ARCH | User onboarding to a working kubeconfig | · | · | · | · | · | · | | 104 | ARCH | User onboarding to a working kubeconfig | · | · | · | · | · | · | · | · | · |
| 105 | ARCH | Kustomize with generators and patches | · | · | · | · | · | · | | 105 | ARCH | Kustomize with generators and patches | · | · | · | · | · | · | · | · | · |
| 106 | ARCH | CRD with validation and defaults | · | · | 0/7 | · | · | · | | 106 | ARCH | CRD with validation and defaults | · | · | 0/7 | · | · | · | 0/7 | 0/7 | · |
| 107 | WORK | Spread, tolerate, prioritise — under a quota | · | · | · | · | · | · | | 107 | WORK | Spread, tolerate, prioritise — under a quota | · | · | · | · | · | · | · | · | · |
| 108 | WORK | Rollback to a specific revision, then pause | · | · | · | · | · | · | | 108 | WORK | Rollback to a specific revision, then pause | · | · | · | · | · | · | · | · | · |
| 109 | WORK | Native sidecar with probes and an exact report | · | · | · | · | · | · | | 109 | WORK | Native sidecar with probes and an exact report | · | · | · | · | · | · | · | · | · |
| 110 | WORK | Cluster audit to exact files | · | · | · | · | · | · | | 110 | WORK | Cluster audit to exact files | · | · | · | · | · | · | · | · | · |
| 111 | NET | Zero-trust namespace | · | · | · | · | · | · | | 111 | NET | Zero-trust namespace | · | · | · | · | · | · | · | · | · |
| 112 | NET | TLS Ingress with a generated certificate | · | · | 0/7 | · | · | · | | 112 | NET | TLS Ingress with a generated certificate | · | · | 0/7 | · | · | · | 0/7 | 0/7 | · |
| 113 | NET | Gateway API canary with header match | · | · | · | · | · | · | | 113 | NET | Gateway API canary with header match | · | · | · | · | · | · | · | · | · |
| 114 | NET | DNS down: three faults | · | · | · | · | · | · | | 114 | NET | DNS down: three faults | · | · | · | · | · | · | · | · | · |
| 115 | STOR | Bind the right local volume | · | · | 1/6 | · | · | · | | 115 | STOR | Bind the right local volume | · | · | 1/6 | · | · | · | 1/6 | 1/6 | · |
| 116 | STOR | Migrate data between claims | · | · | · | · | · | · | | 116 | STOR | Migrate data between claims | · | · | · | · | · | · | · | · | · |
| 117 | TSHOOT | Worker node: three things wrong | · | · | · | · | · | · | | 117 | TSHOOT | Worker node: three things wrong | · | · | · | · | · | · | · | · | · |
| 118 | TSHOOT | Two control-plane components down | · | · | · | · | · | · | | 118 | TSHOOT | Two control-plane components down | · | · | · | · | · | · | · | · | · |
| 119 | TSHOOT | Application down for four reasons | · | · | · | · | · | · | | 119 | TSHOOT | Application down for four reasons | · | · | · | · | · | · | · | · | · |
| 120 | TSHOOT | Cluster facts, exactly | · | · | 0/5 | · | · | · | | 120 | TSHOOT | Cluster facts, exactly | · | · | 0/5 | · | · | · | 0/5 | 0/5 | · |
| 121 | WORK | The context's namespace | · | · | 1/6 | · | · | · | | 121 | WORK | The context's namespace | · | · | 1/6 | · | · | · | 1/6 | 1/6 | · |
| 122 | ARCH | Renew control-plane certificates | · | · | · | · | · | · | | 122 | ARCH | Renew control-plane certificates | · | · | · | · | · | · | · | · | · |
| 123 | TSHOOT | Nothing works: kube-apiserver itself is down | · | · | · | · | · | · | | 123 | TSHOOT | Nothing works: kube-apiserver itself is down | · | · | · | · | · | · | · | · | · |
| 124 | ARCH | Prepare a node join without shell access to the control plane | · | · | · | · | · | · | | 124 | ARCH | Prepare a node join without shell access to the control plane | · | · | · | · | · | · | · | · | · |
| 201 | ARCH | kubeconfig forensics | · | · | · | · | · | · | | 201 | ARCH | kubeconfig forensics | · | · | · | · | · | · | · | · | · |
| 202 | ARCH | Helm chart with CRDs, then a custom resource | · | · | · | · | · | · | | 202 | ARCH | Helm chart with CRDs, then a custom resource | · | · | · | · | · | · | · | · | · |
| 203 | WORK | Find the controller, then scale it | · | · | · | · | · | · | | 203 | WORK | Find the controller, then scale it | · | · | · | · | · | · | · | · | · |
| 204 | WORK | Which Pods get evicted first | · | · | · | · | · | · | | 204 | WORK | Which Pods get evicted first | · | · | · | · | · | · | · | · | · |
| 205 | ARCH | Kustomize: drop a ConfigMap, add an HPA, override in prod | · | · | · | · | · | · | | 205 | ARCH | Kustomize: drop a ConfigMap, add an HPA, override in prod | · | · | · | · | · | · | · | · | · |
| 206 | STOR | PV, PVC and a Deployment that mounts it | · | · | · | · | · | · | | 206 | STOR | PV, PVC and a Deployment that mounts it | · | · | · | · | · | · | · | · | · |
| 207 | TSHOOT | Resource usage scripts | · | · | · | · | · | · | | 207 | TSHOOT | Resource usage scripts | · | · | · | · | · | · | · | · | · |
| 208 | ARCH | Drain a node for maintenance | · | · | · | · | · | · | | 208 | ARCH | Drain a node for maintenance | · | · | · | · | · | · | · | · | · |
| 209 | ARCH | Query the API from inside a Pod | · | · | · | · | · | · | | 209 | ARCH | Query the API from inside a Pod | · | · | · | · | · | · | · | · | · |
| 210 | ARCH | ServiceAccount limited to two resources | · | · | · | · | · | · | | 210 | ARCH | ServiceAccount limited to two resources | · | · | · | · | · | · | · | · | · |
| 211 | WORK | DaemonSet on every node | · | · | · | · | · | · | | 211 | WORK | DaemonSet on every node | · | · | · | · | · | · | · | · | · |
| 212 | WORK | One Pod per node, on purpose | · | · | · | · | · | · | | 212 | WORK | One Pod per node, on purpose | · | · | · | · | · | · | · | · | · |
| 213 | NET | Convert an Ingress to Gateway API, then split on a header | · | · | · | · | · | · | | 213 | NET | Convert an Ingress to Gateway API, then split on a header | · | · | · | · | · | · | · | · | · |
| 214 | ARCH | Certificate expiry, two ways | · | · | · | · | · | · | | 214 | ARCH | Certificate expiry, two ways | · | · | · | · | · | · | · | · | · |
| 215 | NET | Egress policy with paired destinations | · | · | · | · | · | · | | 215 | NET | Egress policy with paired destinations | · | · | · | · | · | · | · | · | · |
| 216 | NET | CoreDNS: back up, extend, verify | · | · | · | · | · | · | | 216 | NET | CoreDNS: back up, extend, verify | · | · | · | · | · | · | · | · | · |
| 217 | TSHOOT | Inspect a container with crictl | · | · | · | · | · | · | | 217 | TSHOOT | Inspect a container with crictl | · | · | · | · | · | · | · | · | · |
| 301 | ARCH | etcd configuration facts | · | · | · | · | · | · | | 301 | ARCH | etcd configuration facts | · | · | · | · | · | · | · | · | · |
| 302 | NET | Service rules on the node | · | · | · | · | · | · | | 302 | NET | Service rules on the node | · | · | · | · | · | · | · | · | · |
| 303 | NET | A second Service CIDR | · | · | · | · | · | · | | 303 | NET | A second Service CIDR | · | · | · | · | · | · | · | · | · |
| 304 | ARCH | Bound tokens versus legacy tokens | · | · | · | · | · | · | | 304 | ARCH | Bound tokens versus legacy tokens | · | · | · | · | · | · | · | · | · |
| 305 | WORK | Schedule without the scheduler | · | · | · | · | · | · | | 305 | WORK | Schedule without the scheduler | · | · | · | · | · | · | · | · | · |
| 306 | STOR | Grow a volume in place | · | · | · | · | · | · | | 306 | STOR | Grow a volume in place | · | · | · | · | · | · | · | · | · |
| 307 | TSHOOT | Node accepts nothing new | · | · | · | · | · | · | | 307 | TSHOOT | Node accepts nothing new | · | · | · | · | · | · | · | · | · |
| 308 | ARCH | API resource reference card | · | · | · | · | · | · | | 308 | ARCH | API resource reference card | · | · | · | · | · | · | · | · | · |
| 309 | WORK | A PodDisruptionBudget that blocks maintenance | · | · | · | · | · | · | | 309 | WORK | A PodDisruptionBudget that blocks maintenance | · | · | · | · | · | · | · | · | · |
| 310 | NET | Route to something outside the cluster | · | · | · | · | · | · | | 310 | NET | Route to something outside the cluster | · | · | · | · | · | · | · | · | · |
| 311 | ARCH | Image inventory across the cluster | · | · | · | · | · | · | | 311 | ARCH | Image inventory across the cluster | · | · | · | · | · | · | · | · | · |
| 312 | WORK | A Job that fails, then one that doesn't | · | · | · | · | · | · | | 312 | WORK | A Job that fails, then one that doesn't | · | · | · | · | · | · | · | · | · |
| 313 | NET | Two hosts, TLS, and a default backend | · | · | · | · | · | · | | 313 | NET | Two hosts, TLS, and a default backend | · | · | · | · | · | · | · | · | · |
| 314 | TSHOOT | A static pod that never starts | · | · | · | · | · | · | | 314 | TSHOOT | A static pod that never starts | · | · | · | · | · | · | · | · | · |
| 315 | STOR | Keep the data when the claim goes | · | · | · | · | · | · | | 315 | STOR | Keep the data when the claim goes | · | · | · | · | · | · | · | · | · |
| 316 | ARCH | Plan a control-plane upgrade | · | · | · | · | · | · | | 316 | ARCH | Plan a control-plane upgrade | · | · | · | · | · | · | · | · | · |
| 317 | TSHOOT | Certificates stop being issued | · | · | · | · | · | · | | 317 | TSHOOT | Certificates stop being issued | · | · | · | · | · | · | · | · | · |
_E = full exam, D = drill, · = not in that session, n/m = partial credit._ _E = full exam, D = drill, · = not in that session, n/m = partial credit._