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c8f3b98 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 | """Task: Kubernetes Pod Failures — MEDIUM.
Agent fixes common pod failure scenarios:
OOMKilled, ImagePullBackOff, wrong command, missing ConfigMap, liveness probe.
"""
from server.models import TaskDifficulty
from server.tasks.base import BaseTask
class K8sPodTask(BaseTask):
NAME = "Kubernetes Pod Failures"
DESCRIPTION = "Fix Kubernetes pod failures including CrashLoopBackOff, ImagePullBackOff, and resource issues"
DIFFICULTY = TaskDifficulty.MEDIUM
AVAILABLE_SECRETS = []
SCENARIOS = [
# Scenario 1: CrashLoopBackOff — OOMKilled (memory limit too low)
{
"id": "oom_killed",
"files": [
{
"path": "k8s/deployment.yaml",
"type": "kubernetes",
"content": (
"apiVersion: apps/v1\n"
"kind: Deployment\n"
"metadata:\n"
" name: api-server\n"
"spec:\n"
" replicas: 3\n"
" selector:\n"
" matchLabels:\n"
" app: api\n"
" template:\n"
" metadata:\n"
" labels:\n"
" app: api\n"
" spec:\n"
" containers:\n"
" - name: api\n"
' image: myapp:v1.2.3\n'
" resources:\n"
" limits:\n"
' memory: "64Mi"\n'
' cpu: "100m"\n'
" ports:\n"
" - containerPort: 8080\n"
),
}
],
"error": {
"phase": "k8s_runtime",
"message": (
"$ kubectl get pods\n"
"NAME READY STATUS RESTARTS AGE\n"
"api-server-7d4b8c9f5-x2k9m 0/1 CrashLoopBackOff 5 3m\n"
"\n"
"$ kubectl describe pod api-server-7d4b8c9f5-x2k9m\n"
"...\n"
"State: Waiting\n"
" Reason: CrashLoopBackOff\n"
"Last State: Terminated\n"
" Reason: OOMKilled\n"
" Exit Code: 137\n"
"...\n"
"Events:\n"
" Warning OOMKilling 3m kubelet Memory limit 64Mi exceeded"
),
},
"expected_fixes": [
{
"file": "k8s/deployment.yaml",
"type": "contains",
"expected": 'memory: "256Mi"',
"hint": "Container is OOMKilled with 64Mi limit. The app needs at least 256Mi.",
}
],
},
# Scenario 2: ImagePullBackOff — image tag typo
{
"id": "image_pull_backoff",
"files": [
{
"path": "k8s/deployment.yaml",
"type": "kubernetes",
"content": (
"apiVersion: apps/v1\n"
"kind: Deployment\n"
"metadata:\n"
" name: web-app\n"
"spec:\n"
" replicas: 2\n"
" selector:\n"
" matchLabels:\n"
" app: web\n"
" template:\n"
" metadata:\n"
" labels:\n"
" app: web\n"
" spec:\n"
" containers:\n"
" - name: web\n"
" image: nginx:latset\n"
" ports:\n"
" - containerPort: 80\n"
),
}
],
"error": {
"phase": "k8s_runtime",
"message": (
"$ kubectl get pods\n"
"NAME READY STATUS RESTARTS AGE\n"
"web-app-5f8d7b6c4-abc12 0/1 ImagePullBackOff 0 2m\n"
"\n"
"$ kubectl describe pod web-app-5f8d7b6c4-abc12\n"
"...\n"
"Events:\n"
' Warning Failed 2m kubelet Failed to pull image "nginx:latset": '
"rpc error: code = NotFound desc = failed to pull and unpack image: "
"reference not found\n"
" Warning Failed 2m kubelet Error: ImagePullBackOff\n"
"..."
),
},
"expected_fixes": [
{
"file": "k8s/deployment.yaml",
"type": "contains",
"expected": "image: nginx:latest",
"hint": "Image tag has a typo: 'latset' should be 'latest'",
}
],
},
# Scenario 3: CrashLoopBackOff — wrong command
{
"id": "wrong_command",
"files": [
{
"path": "k8s/deployment.yaml",
"type": "kubernetes",
"content": (
"apiVersion: apps/v1\n"
"kind: Deployment\n"
"metadata:\n"
" name: worker\n"
"spec:\n"
" replicas: 1\n"
" selector:\n"
" matchLabels:\n"
" app: worker\n"
" template:\n"
" metadata:\n"
" labels:\n"
" app: worker\n"
" spec:\n"
" containers:\n"
" - name: worker\n"
" image: python:3.11-slim\n"
" command: [\"python\", \"workers.py\"]\n"
" resources:\n"
" limits:\n"
' memory: "512Mi"\n'
' cpu: "500m"\n'
),
},
{
"path": "app/worker.py",
"type": "other",
"content": (
"import time\n"
"\n"
"def main():\n"
" while True:\n"
" print('Processing...')\n"
" time.sleep(5)\n"
"\n"
"if __name__ == '__main__':\n"
" main()\n"
),
},
],
"error": {
"phase": "k8s_runtime",
"message": (
"$ kubectl get pods\n"
"NAME READY STATUS RESTARTS AGE\n"
"worker-6b8f9d7c4-kj3m2 0/1 CrashLoopBackOff 4 2m\n"
"\n"
"$ kubectl logs worker-6b8f9d7c4-kj3m2\n"
"python: can't open file '/workers.py': [Errno 2] No such file or directory\n"
"\n"
"$ kubectl describe pod worker-6b8f9d7c4-kj3m2\n"
"...\n"
"State: Waiting\n"
" Reason: CrashLoopBackOff\n"
"Last State: Terminated\n"
" Reason: Error\n"
" Exit Code: 2\n"
"..."
),
},
"expected_fixes": [
{
"file": "k8s/deployment.yaml",
"type": "contains",
"expected": 'command: ["python", "worker.py"]',
"hint": "The command references 'workers.py' but the file is named 'worker.py' (no 's')",
}
],
},
# Scenario 4: CreateContainerConfigError — missing ConfigMap
{
"id": "missing_configmap",
"files": [
{
"path": "k8s/deployment.yaml",
"type": "kubernetes",
"content": (
"apiVersion: apps/v1\n"
"kind: Deployment\n"
"metadata:\n"
" name: backend\n"
"spec:\n"
" replicas: 2\n"
" selector:\n"
" matchLabels:\n"
" app: backend\n"
" template:\n"
" metadata:\n"
" labels:\n"
" app: backend\n"
" spec:\n"
" containers:\n"
" - name: backend\n"
" image: mybackend:v2.0\n"
" ports:\n"
" - containerPort: 8080\n"
" envFrom:\n"
" - configMapRef:\n"
" name: app-config\n"
" resources:\n"
" limits:\n"
' memory: "512Mi"\n'
' cpu: "500m"\n'
),
},
],
"error": {
"phase": "k8s_runtime",
"message": (
"$ kubectl get pods\n"
"NAME READY STATUS RESTARTS AGE\n"
"backend-5c9d8f7b6-lm4n5 0/1 CreateContainerConfigError 0 1m\n"
"\n"
"$ kubectl describe pod backend-5c9d8f7b6-lm4n5\n"
"...\n"
"Events:\n"
' Warning Failed 1m kubelet Error: configmap "app-config" not found\n'
"..."
),
},
"expected_fixes": [
{
"file": "k8s/configmap.yaml",
"type": "contains",
"expected": "name: app-config",
"hint": "The ConfigMap 'app-config' is referenced but doesn't exist. Create a ConfigMap manifest.",
}
],
},
# Scenario 5: Pod not ready — liveness probe failing
{
"id": "liveness_probe_failing",
"files": [
{
"path": "k8s/deployment.yaml",
"type": "kubernetes",
"content": (
"apiVersion: apps/v1\n"
"kind: Deployment\n"
"metadata:\n"
" name: api\n"
"spec:\n"
" replicas: 2\n"
" selector:\n"
" matchLabels:\n"
" app: api\n"
" template:\n"
" metadata:\n"
" labels:\n"
" app: api\n"
" spec:\n"
" containers:\n"
" - name: api\n"
" image: myapi:v3.1\n"
" ports:\n"
" - containerPort: 8080\n"
" livenessProbe:\n"
" httpGet:\n"
" path: /healthz\n"
" port: 3000\n"
" initialDelaySeconds: 5\n"
" periodSeconds: 10\n"
" readinessProbe:\n"
" httpGet:\n"
" path: /ready\n"
" port: 8080\n"
" initialDelaySeconds: 5\n"
" periodSeconds: 10\n"
" resources:\n"
" limits:\n"
' memory: "512Mi"\n'
' cpu: "500m"\n'
),
},
],
"error": {
"phase": "k8s_runtime",
"message": (
"$ kubectl get pods\n"
"NAME READY STATUS RESTARTS AGE\n"
"api-7f8d9c6b5-gh7j8 0/1 Running 3 (30s ago) 2m\n"
"\n"
"$ kubectl describe pod api-7f8d9c6b5-gh7j8\n"
"...\n"
"Events:\n"
" Warning Unhealthy 90s kubelet Liveness probe failed: "
"Get \"http://10.244.0.5:3000/healthz\": dial tcp 10.244.0.5:3000: "
"connect: connection refused\n"
" Normal Killing 90s kubelet Container api failed liveness probe, "
"will be restarted\n"
"...\n"
"\n"
"Note: The application listens on port 8080, not 3000."
),
},
"expected_fixes": [
{
"file": "k8s/deployment.yaml",
"type": "contains",
"expected": "port: 8080\n initialDelaySeconds: 5\n periodSeconds: 10\n readinessProbe:",
"hint": "The liveness probe port (3000) doesn't match the container port (8080). Change liveness probe port to 8080.",
}
],
},
]
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