✨(backends) add graylog service

LDP backends is available for tests.But until now, no service was
available in the project. We have implemented a graylog service for it.

Makefile

@@ -114,6 +114,7 @@ run: \
 run-all: ## start all supported local backends
 run-all: \
 	run-es \
+	run-graylog \
 	run-swift
 .PHONY: run-all
 
@@ -123,6 +124,12 @@ run-es: ## start elasticsearch backend
 	@$(COMPOSE_RUN) dockerize -wait tcp://elasticsearch:9200 -timeout 60s
 .PHONY: run-es
 
+run-graylog: ## start graylog backend
+	@$(COMPOSE) up -d graylog graylog_elasticsearch graylog_mongo
+	@echo "Waiting for graylog to be up and running..."
+	@$(COMPOSE_RUN) dockerize -wait tcp://graylog:9000 -timeout 60s
+.PHONY: run-graylog
+
 run-swift: ## start swift backend
 	@$(COMPOSE) up -d swift
 	@echo "Waiting for swift to be up and running..."

docker-compose.yml

@@ -1,4 +1,4 @@
-version: '3.4'
+version: "3.4"
 
 services:
   app:
@@ -37,6 +37,47 @@ services:
     environment:
       KS_SWIFT_PUBLIC_URL: http://127.0.0.1:49177
 
+  graylog_mongo:
+    container_name: mongo
+    image: mongo:4.2
+    networks:
+      - default
+
+  graylog_elasticsearch:
+    container_name: elasticsearch
+    image: docker.elastic.co/elasticsearch/elasticsearch-oss:7.10.2
+    environment:
+      - http.host=0.0.0.0
+      - transport.host=localhost
+      - network.host=0.0.0.0
+      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
+    ulimits:
+      memlock:
+        soft: -1
+        hard: -1
+    ports:
+      - 9300:9300
+    deploy:
+      resources:
+        limits:
+          memory: 1g
+    networks:
+      - default
+
+  graylog:
+    image: graylog/graylog:4.0
+    environment:
+      - GRAYLOG_HTTP_EXTERNAL_URI=http://localhost:9000/
+    entrypoint: /usr/bin/tini -- wait-for-it elasticsearch:9300 --  /docker-entrypoint.sh
+    networks:
+      - default
+    depends_on:
+      - graylog_mongo
+      - graylog_elasticsearch
+    ports:
+      - 9000:9000
+      - 12201:12201
+
   # -- tools
   dockerize:
     image: jwilder/dockerize