让容器在弹性容器服务 (ECS) 中相互通信? [英] Getting containers to talk to each other in Elastic Container Service (ECS)?
问题描述
我正在使用 AWS 和 Elastic Container Service (ECS).我有 6 个服务，每个服务都在自己的容器中运行，需要相互通信才能工作.
I'm using AWS and Elastic Container Service (ECS). I have 6 services, each running in their own container that need to talk to each other in order to work.
当我在本地机器上执行docker-compose"时，每个服务都会在自己的容器中启动，并使用 docker 为其提供的默认名称作为其主机名.我可以使用来自registration-service"容器的主机名database"访问数据库容器，依此类推:
When I do a 'docker-compose' on my local machine, each service starts up in its own container and uses the default name that docker gives it as its hostname. I can access the database container using hostname 'database' from the 'registration-service' container, and so forth:
PORTS NAMES
0.0.0.0:8901->8901/tcp common_authenticationservice_1
0.0.0.0:8888->8888/tcp common_configserver_1
0.0.0.0:5555->5555/tcp common_zuulserver_1
0.0.0.0:8761->8761/tcp common_eurekaserver_1
0.0.0.0:8082->8082/tcp common_registrationservice_1
0.0.0.0:5432->5432/tcp common_database_1
当我使用ecs-cli compose"部署到 ECS 时，服务在 EC2 实例中再也找不到彼此了.'registration-service' 寻找主机名 'database' 却找不到，就像其他的一样:
When I deploy to ECS using 'ecs-cli compose' the services can't find each other anymore in the EC2 instance. The 'registration-service' looks for hostname 'database' and can't find it, as with the others:
PORTS NAMES
0.0.0.0:8888->8888/tcp ecs-common-41-configserver-fa98a8edd6fabfd98f01
0.0.0.0:5432->5432/tcp ecs-common-41-database-9e95dfb9d591e1d2f101
0.0.0.0:8901->8901/tcp ecs-common-41-authenticationservice-92c4e6b7f5f49dcf0500
0.0.0.0:8082->8082/tcp ecs-common-41-registrationservice-c4e384f7f39581a28901
0.0.0.0:8761->8761/tcp ecs-common-41-eurekaserver-9eb6bc89ebf79ba50200
0.0.0.0:5555->5555/tcp ecs-common-41-zuulserver-be8ff59cc0eee2965400
据我所知，我需要一些了解我所有容器的东西，让它们注册并检查它们的健康状况.理想情况下，此解决方案将为我提供一个主机名，我可以将其用于每个服务(以及我想要扩展的任何相同服务)并将 DNS 请求路由到这些服务之一.
From what I understand, I need something that is aware of all of my containers, lets them register and checks their health. Ideally, this solution would give me a hostname that I can use for each service (and any identical services I want to scale out) and route DNS requests to one of these services.
我尝试在我的 ECS 集群上创建一个具有服务发现"功能的服务，但它要求指向我的一个容器，然后抱怨它们使用相同的端口并拒绝启动.也许这不是我想的那样?
I've tried creating a service on my ECS cluster with the 'service discovery' feature, but it asks to point to one of my containers and then complains that they are using the same port and refuses to start up. Perhaps this is not what I think it is?
这是我的 ECS docker-compose 文件:
Here is my docker-compose file for ECS:
version: "3"
services:
eurekaserver:
container_name: eurekaserver
image: 294417223953.dkr.ecr.us-east-1.amazonaws.com/eureka-server:latest
ports:
- "8761:8761"
configserver:
image: 294417223953.dkr.ecr.us-east-1.amazonaws.com/configuration-server:latest
ports:
- "8888:8888"
environment:
EUREKASERVER_PORT: 8761
EUREKASERVER_URI: "http://eurekaserver:8761/eureka/"
ENCRYPT_KEY: "IMSYMMETRIC"
zuulserver:
image: 294417223953.dkr.ecr.us-east-1.amazonaws.com/johncarnell/tmx-zuulsvr:chapter7
ports:
- "5555:5555"
environment:
PROFILE: "default"
SERVER_PORT: "5555"
CONFIGSERVER_PORT: 8888
EUREKASERVER_PORT: 8761
CONFIGSERVER_URI: "http://configserver:8888"
EUREKASERVER_URI: "http://eurekaserver:8761/eureka/"
database:
image: postgres:9.5
ports:
- "5432:5432"
environment:
- POSTGRES_USER=postgres
- POSTGRES_PASSWORD=******
- POSTGRES_DB=practicejournal
registrationservice:
image: 294417223953.dkr.ecr.us-east-1.amazonaws.com/registration-service:latest
ports:
- "8082:8082"
environment:
PROFILE: "default"
SERVER_PORT: "8082"
ES_PORT: 9200
DATABASE_PORT: 5432
CONFIGSERVER_PORT: 8888
EUREKASERVER_PORT: 8761
AUTHSERVER_PORT: 8091
CONFIGSERVER_URI: "http://configserver:8888"
EUREKASERVER_URI: "http://eurekaserver:8761/eureka/"
AUTHSERVER_URI: "http://authenticationservice:8901/auth/user"
ENCRYPT_KEY: "IMSYMMETRIC"
authenticationservice:
image: 294417223953.dkr.ecr.us-east-1.amazonaws.com/authentication-service:latest
ports:
- "8901:8901"
environment:
PROFILE: "default"
SERVER_PORT: "8901"
DATABASE_PORT: 5432
CONFIGSERVER_PORT: 8888
EUREKASERVER_PORT: 8761
CONFIGSERVER_URI: "http://configserver:8888"
EUREKASERVER_URI: "http://eurekaserver:8761/eureka/"
ENCRYPT_KEY: "IMSYMMETRIC"
此外，我有一个脚本，它在 docker 容器启动后立即运行.最后，这个脚本启动了 Java 微服务:
Also, I have a script that runs on the docker container just after it is started. Eventually, this script starts the Java microservice:
#!/bin/sh
echo "********************************************************"
echo "Waiting for the eureka server to start on port $EUREKASERVER_PORT"
echo "********************************************************"
while ! `nc -z eurekaserver $EUREKASERVER_PORT`; do sleep 3; done
echo "******* Eureka Server has started"
echo "********************************************************"
echo "Waiting for the database server to start on port $DATABASE_PORT"
echo "********************************************************"
while ! `nc -z database $DATABASE_PORT`; do sleep 3; done
echo "******** Database Server has started "
echo "********************************************************"
echo "Waiting for the configuration server to start on port $CONFIGSERVER_PORT"
echo "********************************************************"
while ! `nc -z configserver $CONFIGSERVER_PORT`; do sleep 3; done
echo "******* Configuration Server has started"
echo "********************************************************"
echo "Starting Organization Service "
echo "********************************************************"
java -Djava.security.egd=file:/dev/./urandom -Dserver.port=$SERVER_PORT \
-Deureka.client.serviceUrl.defaultZone=$EUREKASERVER_URI \
-Dspring.cloud.config.uri=$CONFIGSERVER_URI \
-Dspring.profiles.active=$PROFILE \
-Dsecurity.oauth2.resource.userInfoUri=$AUTHSERVER_URI \
-jar /usr/local/registrationservice/@project.build.finalName@.jar
这不可能是一个独特的问题.我错过了什么吗?什么 AWS 解决方案将帮助我在 ECS 中注册容器、在它们之间路由请求并检查它们的健康状况，我该如何设置?
This can't be a unique problem. Am I missing something? What AWS solution will help me register containers in ECS, route requests between them and check their health and how do I set this up?
推荐答案
1: 我看到从容器 A 连接到容器 B 应该有容器的名称.2:依赖容器A的容器B应该有容器A的Link.3:在你的情况下，Container Configserver 依赖于 Eurekaserver.所以Configserver里面应该有Eurekaserver的链接.4:应该指定唯一的容器名称，以便其他容器可以使用该名称与他们交谈.5:我已经更新了 docker-compose 文件，请检查它并让我知道如果有任何问题.
1: I see that to connect from container A to container B There should be a name for the containers. 2: Container B which depends on container A should have Link of Container A. 3: In your case, the Container Configserver depends on the Eurekaserver. So there should be a link of Eurekaserver in the Configserver. 4: There should be Unique Container Name specified So that others containers can talk to them using that. 5: I have updated the docker-compose file, Do have check with it and let me know If there are any concerns.
version: '3'
services:
eurekaserver:
container_name: eurekaserver
image: '294417223953.dkr.ecr.us-east-1.amazonaws.com/eureka-server:latest'
ports:
- '8761:8761'
configserver:
container_name: configserver
image: '294417223953.dkr.ecr.us-east-1.amazonaws.com/configuration-server:latest'
ports:
- '8888:8888'
environment:
EUREKASERVER_PORT: 8761
EUREKASERVER_URI: 'http://eurekaserver:8761/eureka/'
ENCRYPT_KEY: IMSYMMETRIC
links:
- eurekaserver
zuulserver:
container_name: zuulserver
image: '294417223953.dkr.ecr.us-east-1.amazonaws.com/johncarnell/tmx-zuulsvr:chapter7'
ports:
- '5555:5555'
environment:
PROFILE: default
SERVER_PORT: '5555'
CONFIGSERVER_PORT: 8888
EUREKASERVER_PORT: 8761
CONFIGSERVER_URI: 'http://configserver:8888'
EUREKASERVER_URI: 'http://eurekaserver:8761/eureka/'
links:
- eurekaserver
- configserver
database:
container_name: database
image: 'postgres:9.5'
ports:
- '5432:5432'
environment:
- POSTGRES_USER=postgres
- 'POSTGRES_PASSWORD=******'
- POSTGRES_DB=practicejournal
authenticationservice:
container_name: authenticationservice
image: '294417223953.dkr.ecr.us-east-1.amazonaws.com/authentication-service:latest'
ports:
- '8901:8901'
environment:
PROFILE: default
SERVER_PORT: '8901'
DATABASE_PORT: 5432
CONFIGSERVER_PORT: 8888
EUREKASERVER_PORT: 8761
CONFIGSERVER_URI: 'http://configserver:8888'
EUREKASERVER_URI: 'http://eurekaserver:8761/eureka/'
ENCRYPT_KEY: IMSYMMETRIC
links:
- eurekaserver
- configserver
registrationservice:
container_name: registrationservice
image: '294417223953.dkr.ecr.us-east-1.amazonaws.com/registration-service:latest'
ports:
- '8082:8082'
environment:
PROFILE: default
SERVER_PORT: '8082'
ES_PORT: 9200
DATABASE_PORT: 5432
CONFIGSERVER_PORT: 8888
EUREKASERVER_PORT: 8761
AUTHSERVER_PORT: 8091
CONFIGSERVER_URI: 'http://configserver:8888'
EUREKASERVER_URI: 'http://eurekaserver:8761/eureka/'
AUTHSERVER_URI: 'http://authenticationservice:8901/auth/user'
ENCRYPT_KEY: IMSYMMETRIC
links:
- eurekaserver
- configserver
- authenticationservice
最好为容器添加 HealthCheck 和 Depends-On Key value Pairs.查看链接此处了解详情.
It is better to add the HealthCheck and the Depends-On Key value Pairs for the Containers. Check Link Here for details.
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