Prosty sequential proxy

api-mocks/projects/1.json

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+{
+	"owner": 1,
+	"name": "Simple project"
+}

api-mocks/users/1.json

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+{
+	"id": 1,
+	"username": "test"
+}

api-mocks/users/2.json

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+{
+	"id": 2,
+	"username": "test2"
+}

docker-compose.yml

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+version: "3.8"
+services:
+
+  jaeger:
+    image: jaegertracing/all-in-one:latest
+    ports:
+      - "16686:16686"
+      - "14268:14268"
+
+  api:
+    image: paramah/lwan
+    volumes:
+      - ./api-mocks:/opt/lwan/wwwroot
+    ports:
+      - "8000:8080"
+
+  kraken:
+    image: devopsfaith/krakend:config-watcher
+    volumes:
+      - ./krakend:/etc/krakend
+    ports:
+      - "1234:1234"
+      - "8080:8080"
+      - "8091:8091"
+    depends_on:
+      - api
+      - jaeger
+

krakend/krakend.json

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+{
+  "version": 2,
+  "timeout": "3000ms",
+  "cache_ttl": "300s",
+  "host": [
+    "http://api:8080"
+  ],
+  "extra_config": {
+    "github_com/devopsfaith/krakend-metrics": {
+      "listen_address": ":8091"
+    },
+    "github_com/devopsfaith/krakend-gologging": {
+      "level": "DEBUG",
+      "prefix": "[KRAKEND]",
+      "syslog": false,
+      "stdout": true
+    },
+    "github_com/devopsfaith/krakend-opencensus": {
+      "sample_rate": 100,
+      "reporting_period": 1,
+      "exporters": {
+        "jaeger": {
+          "endpoint": "http://jaeger:14268",
+          "service_name": "krakend"
+        }
+      }
+    },
+    "github_com/devopsfaith/krakend-cors": {
+      "allow_origins": [
+        "http://localhost:8000"
+      ],
+      "allow_methods": [
+        "POST",
+        "GET"
+      ],
+      "allow_headers": [
+        "Origin",
+        "Authorization",
+        "Content-Type"
+      ],
+      "expose_headers": [
+        "Content-Length"
+      ],
+      "max_age": "12h"
+    }
+  },
+  "endpoints":[
+    {
+      "endpoint": "/sequential/{id}",
+      "backend": [
+        {
+          "url_pattern": "/users/{id}.json",
+          "whitelist": [
+            "id",
+            "username"
+          ],
+          "extra_config": {},
+          "encoding": "json",
+          "blacklist": [
+            "id"
+          ]
+        },
+        {
+          "url_pattern": "/projects/{resp0_id}.json",
+          "whitelist": [
+            "name"
+          ],
+          "group": "projects"
+        }
+      ],
+      "extra_config": {
+        "github.com/devopsfaith/krakend/proxy": {
+          "sequential": true
+        }
+      }
+    }
+  ]
+}