如何在AWS ECS中执行同一任务的容器之间进行通信? [英] How to communicate between containers in the same task in AWS ECS?

问题描述

我有一个 service-A ，其任务定义为 task-A ，其中包括多个容器定义，例如 nginx 和grafana .这些容器如何相互通信?使用的网络是默认的桥接网络.

I have a service-A with a task definition task-A that includes multiple container definitions, for example nginx and grafana. How can these containers communicate with each other? The network used is the default bridge network.

我尝试了 curl grafana:3000 ，但是容器无法解析名称.如果我在本地计算机上尝试相同的方法，它将可以正常工作.我想念什么?

I have tried curl grafana:3000, but the container is not able to resolve the name. If I would try the same on my local machine it would work. What am I missing?

这是我的任务定义:

resource "aws_ecs_task_definition" "this" {
  family = "x"
  execution_role_arn = "x"
  task_role_arn = "x"
  container_definitions = jsonencode(local.task_definition)
}

容器定义摘录:

locals {
  task_definition = [
    {
      name: "nginx",
      image: "nginx:latest",
      portMappings: [{
        containerPort: 80,
        hostPort: 0,
        protocol: "tcp"
      }],
      dependsOn: [{
        "containerName": "grafana",
        "condition": "START"
      }]
    },
    {
      name: "grafana",
      image: "grafana/grafana:latest",
      portMappings: [{
        containerPort : 3000,
        hostPort: 0,
        protocol: "tcp"
      }]
    }
  ]
}

推荐答案

dependsOn 仅在按顺序启动容器时起作用，需要链接以使服务之间进行服务到服务级别的通信.

dependsOn only work to start the container in order, you need linking to make service to service level communication between container.

      dependsOn: [{
        "containerName": "grafana",
        "condition": "START"
      }]
      "links": [
        "grafana"
      ]

来自文档

links
Type: string array

Required: no

link参数允许容器相互通信无需端口映射.仅在网络模式下受支持定义的任务集被设置为桥接.名称:internalName构造类似于Docker链接中的name:alias.最多255个字母(大写和小写)，数字，连字符和下划线是允许

The link parameter allows containers to communicate with each other without the need for port mappings. Only supported if the network mode of a task definition is set to bridge. The name:internalName construct is analogous to name:alias in Docker links. Up to 255 letters (uppercase and lowercase), numbers, hyphens, and underscores are allowed

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