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c8f3b98 2794920 c8f3b98 2794920 c8f3b98 2794920 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 | """Task: Kubernetes Service & Ingress Issues — MEDIUM-HARD.
Agent fixes networking issues in Kubernetes:
selector mismatch, port mismatch, ingress path errors,
NetworkPolicy blocking traffic, missing ingress annotations.
"""
from server.models import TaskDifficulty
from server.tasks.base import BaseTask
class K8sNetworkingTask(BaseTask):
NAME = "Kubernetes Service & Ingress Issues"
DESCRIPTION = "Fix Kubernetes networking issues including Service selectors, port mismatches, and Ingress configuration"
DIFFICULTY = TaskDifficulty.HARD
AVAILABLE_SECRETS = []
SCENARIOS = [
# Scenario 1: Service selector does not match Deployment labels
{
"id": "selector_mismatch",
"files": [
{
"path": "k8s/deployment.yaml",
"type": "kubernetes",
"content": (
"apiVersion: apps/v1\n"
"kind: Deployment\n"
"metadata:\n"
" name: api\n"
"spec:\n"
" replicas: 3\n"
" selector:\n"
" matchLabels:\n"
" app: api-server\n"
" template:\n"
" metadata:\n"
" labels:\n"
" app: api-server\n"
" spec:\n"
" containers:\n"
" - name: api\n"
" image: myapp:latest\n"
" ports:\n"
" - containerPort: 8080\n"
),
},
{
"path": "k8s/service.yaml",
"type": "kubernetes",
"content": (
"apiVersion: v1\n"
"kind: Service\n"
"metadata:\n"
" name: api-service\n"
"spec:\n"
" selector:\n"
" app: api\n"
" ports:\n"
" - port: 80\n"
" targetPort: 8080\n"
),
},
],
"error": {
"phase": "k8s_networking",
"message": (
"$ kubectl get endpoints api-service\n"
"NAME ENDPOINTS AGE\n"
"api-service <none> 5m\n"
"\n"
"$ kubectl describe service api-service\n"
"Name: api-service\n"
"Selector: app=api\n"
"Type: ClusterIP\n"
"Endpoints: <none>\n"
"\n"
"$ kubectl get pods --show-labels\n"
"NAME READY STATUS LABELS\n"
"api-7f8d9c6b5-x2k9m 1/1 Running app=api-server\n"
"api-7f8d9c6b5-y3l0n 1/1 Running app=api-server\n"
"api-7f8d9c6b5-z4m1o 1/1 Running app=api-server\n"
"\n"
"Hint: Compare the Service selector with the pod labels shown above."
),
},
"expected_fixes": [
{
"file": "k8s/service.yaml",
"type": "contains",
"expected": "app: api-server",
"hint": "Service selector 'app: api' doesn't match Deployment label 'app: api-server'",
}
],
},
# Scenario 2: Service targetPort does not match container port
{
"id": "port_mismatch",
"files": [
{
"path": "k8s/deployment.yaml",
"type": "kubernetes",
"content": (
"apiVersion: apps/v1\n"
"kind: Deployment\n"
"metadata:\n"
" name: frontend\n"
"spec:\n"
" replicas: 2\n"
" selector:\n"
" matchLabels:\n"
" app: frontend\n"
" template:\n"
" metadata:\n"
" labels:\n"
" app: frontend\n"
" spec:\n"
" containers:\n"
" - name: frontend\n"
" image: frontend:v1.0\n"
" ports:\n"
" - containerPort: 3000\n"
),
},
{
"path": "k8s/service.yaml",
"type": "kubernetes",
"content": (
"apiVersion: v1\n"
"kind: Service\n"
"metadata:\n"
" name: frontend-svc\n"
"spec:\n"
" selector:\n"
" app: frontend\n"
" ports:\n"
" - port: 80\n"
" targetPort: 8080\n"
),
},
],
"error": {
"phase": "k8s_networking",
"message": (
"$ kubectl get endpoints frontend-svc\n"
"NAME ENDPOINTS AGE\n"
"frontend-svc 10.244.0.5:8080 3m\n"
"\n"
"$ curl http://frontend-svc\n"
"curl: (7) Failed to connect to frontend-svc port 80: Connection refused\n"
"\n"
"$ kubectl exec -it test-pod -- wget -qO- http://10.244.0.5:3000\n"
"<!DOCTYPE html><html>...</html>\n"
"\n"
"Hint: The container responds on a different port than the Service expects."
),
},
"expected_fixes": [
{
"file": "k8s/service.yaml",
"type": "contains",
"expected": "targetPort: 3000",
"hint": "Service targetPort (8080) doesn't match container port (3000)",
}
],
},
# Scenario 3: Ingress path not matching backend service
{
"id": "ingress_wrong_service",
"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:v1.0\n"
" ports:\n"
" - containerPort: 8080\n"
),
},
{
"path": "k8s/service.yaml",
"type": "kubernetes",
"content": (
"apiVersion: v1\n"
"kind: Service\n"
"metadata:\n"
" name: api-service\n"
"spec:\n"
" selector:\n"
" app: api\n"
" ports:\n"
" - port: 80\n"
" targetPort: 8080\n"
),
},
{
"path": "k8s/ingress.yaml",
"type": "kubernetes",
"content": (
"apiVersion: networking.k8s.io/v1\n"
"kind: Ingress\n"
"metadata:\n"
" name: api-ingress\n"
"spec:\n"
" rules:\n"
" - host: api.example.com\n"
" http:\n"
" paths:\n"
" - path: /\n"
" pathType: Prefix\n"
" backend:\n"
" service:\n"
" name: api-svc\n"
" port:\n"
" number: 80\n"
),
},
],
"error": {
"phase": "k8s_networking",
"message": (
"$ kubectl describe ingress api-ingress\n"
"Name: api-ingress\n"
"Rules:\n"
" Host Path Backends\n"
" ---- ---- --------\n"
" api.example.com\n"
" / api-svc:80 (<error: endpoints \"api-svc\" not found>)\n"
"\n"
"$ kubectl get svc\n"
"NAME TYPE CLUSTER-IP PORT(S)\n"
"api-service ClusterIP 10.96.0.10 80/TCP\n"
"\n"
"Hint: The Ingress backend service name does not match any existing Service."
),
},
"expected_fixes": [
{
"file": "k8s/ingress.yaml",
"type": "contains",
"expected": "name: api-service",
"hint": "Ingress backend references 'api-svc' but the Service is named 'api-service'",
}
],
},
# Scenario 4: NetworkPolicy blocking all ingress traffic
{
"id": "network_policy_blocking",
"files": [
{
"path": "k8s/deployment.yaml",
"type": "kubernetes",
"content": (
"apiVersion: apps/v1\n"
"kind: Deployment\n"
"metadata:\n"
" name: database\n"
"spec:\n"
" replicas: 1\n"
" selector:\n"
" matchLabels:\n"
" app: database\n"
" template:\n"
" metadata:\n"
" labels:\n"
" app: database\n"
" spec:\n"
" containers:\n"
" - name: postgres\n"
" image: postgres:15\n"
" ports:\n"
" - containerPort: 5432\n"
" env:\n"
" - name: POSTGRES_PASSWORD\n"
' value: "secretpass"\n'
),
},
{
"path": "k8s/service.yaml",
"type": "kubernetes",
"content": (
"apiVersion: v1\n"
"kind: Service\n"
"metadata:\n"
" name: database-svc\n"
"spec:\n"
" selector:\n"
" app: database\n"
" ports:\n"
" - port: 5432\n"
" targetPort: 5432\n"
),
},
{
"path": "k8s/networkpolicy.yaml",
"type": "kubernetes",
"content": (
"apiVersion: networking.k8s.io/v1\n"
"kind: NetworkPolicy\n"
"metadata:\n"
" name: db-policy\n"
"spec:\n"
" podSelector:\n"
" matchLabels:\n"
" app: database\n"
" policyTypes:\n"
" - Ingress\n"
" ingress: []\n"
),
},
],
"error": {
"phase": "k8s_networking",
"message": (
"$ kubectl exec -it api-pod -- pg_isready -h database-svc -p 5432\n"
"database-svc:5432 - no response\n"
"\n"
"$ kubectl get pods\n"
"NAME READY STATUS RESTARTS AGE\n"
"database-6b8f9d7c4-kj3m2 1/1 Running 0 5m\n"
"api-pod 1/1 Running 0 5m\n"
"\n"
"$ kubectl get networkpolicy\n"
"NAME POD-SELECTOR AGE\n"
"db-policy app=database 5m\n"
"\n"
"$ kubectl describe networkpolicy db-policy\n"
"Spec:\n"
" PodSelector: app=database\n"
" Allowing ingress traffic: <none> (Selected pods are isolated for ingress connectivity)\n"
"\n"
"Note: NetworkPolicy with empty ingress list blocks ALL inbound traffic to the database"
),
},
"expected_fixes": [
{
"file": "k8s/networkpolicy.yaml",
"type": "contains",
"expected": "app: api",
"hint": "NetworkPolicy has empty ingress rules (blocks all traffic). Add an ingress rule allowing traffic from pods with label 'app: api'.",
}
],
},
# Scenario 5: Ingress missing ingressClassName
{
"id": "missing_ingress_class",
"files": [
{
"path": "k8s/deployment.yaml",
"type": "kubernetes",
"content": (
"apiVersion: apps/v1\n"
"kind: Deployment\n"
"metadata:\n"
" name: webapp\n"
"spec:\n"
" replicas: 2\n"
" selector:\n"
" matchLabels:\n"
" app: webapp\n"
" template:\n"
" metadata:\n"
" labels:\n"
" app: webapp\n"
" spec:\n"
" containers:\n"
" - name: webapp\n"
" image: webapp:v2.0\n"
" ports:\n"
" - containerPort: 8080\n"
),
},
{
"path": "k8s/service.yaml",
"type": "kubernetes",
"content": (
"apiVersion: v1\n"
"kind: Service\n"
"metadata:\n"
" name: webapp-svc\n"
"spec:\n"
" selector:\n"
" app: webapp\n"
" ports:\n"
" - port: 80\n"
" targetPort: 8080\n"
),
},
{
"path": "k8s/ingress.yaml",
"type": "kubernetes",
"content": (
"apiVersion: networking.k8s.io/v1\n"
"kind: Ingress\n"
"metadata:\n"
" name: webapp-ingress\n"
"spec:\n"
" rules:\n"
" - host: webapp.example.com\n"
" http:\n"
" paths:\n"
" - path: /\n"
" pathType: Prefix\n"
" backend:\n"
" service:\n"
" name: webapp-svc\n"
" port:\n"
" number: 80\n"
),
},
],
"error": {
"phase": "k8s_networking",
"message": (
"$ kubectl describe ingress webapp-ingress\n"
"Name: webapp-ingress\n"
"Address: \n"
"Rules:\n"
" Host Path Backends\n"
" ---- ---- --------\n"
" webapp.example.com / webapp-svc:80 (10.244.0.5:8080)\n"
"\n"
"$ curl -H 'Host: webapp.example.com' http://<loadbalancer-ip>/\n"
"curl: (7) Failed to connect: Connection refused\n"
"\n"
"$ kubectl get ingressclass\n"
"NAME CONTROLLER PARAMETERS AGE\n"
"nginx k8s.io/ingress-nginx <none> 10d\n"
"\n"
"Note: Ingress has no ingressClassName specified. The cluster requires "
"explicit ingressClassName: nginx"
),
},
"expected_fixes": [
{
"file": "k8s/ingress.yaml",
"type": "contains",
"expected": "ingressClassName: nginx",
"hint": "Ingress needs 'ingressClassName: nginx' in the spec to be picked up by the nginx ingress controller",
}
],
},
]
|