在 ECS fargate 任务中解析服务主机名

Question

我正在尝试使用 terraform 使我的 ECS fargate 集群自动化。

我有一个包含微服务容器化的 SpringBoot 项目，我将这些图像放在后端 ECS 服务的单个任务定义中。

ECS 集群最初是运行，但 Kafka 正在停止并出现错误：

ERROR Unable to resolve address: zookeeper:2181
(org.apache.zookeeper.client.StaticHostProvider)

我已经为 zookeeper(bitnami) 提供了图像并且也使用了 KAFKA_CFG_ZOOKEEPER_CONNECT 环境变量。

编辑：我的任务定义：

resource "aws_ecs_task_definition" "this" {
  family                   = local.application_name
  requires_compatibilities = [local.launch_type]
  execution_role_arn       = data.aws_iam_role.ecs_task_execution_role.arn
  network_mode             = "awsvpc"
  cpu                      = "4096"
  memory                   = "30720"
  container_definitions = jsonencode([
    {
      name      = "zookeeper"
      image     = "docker.io/bitnami/zookeeper:latest"
      essential = true
      cpu       = 512
      memory    = 1024
      portMappings = [
        {
          containerPort = 2181
          hostPort      = 2181
        }
      ]
      "environment" : [
        { "name" : "ALLOW_ANONYMOUS_LOGIN", "value" : "yes" },
        { "name" : "ZOO_LISTEN_ALLIPS_ENABLED", "value" : "yes" }
      ]
    },
    {
      name      = "kafka-server"
      image     = "docker.io/bitnami/kafka:latest"
      essential = true
      cpu       = 512
      memory    = 1024
      portMappings = [
        {
          containerPort = 9092
          hostPort      = 9092
        }
      ]
      depends_on =  [
        "zookeeper"
      ]
      "environment" : [
        { "name" : "KAFKA_CFG_ZOOKEEPER_CONNECT", "value" : "zookeeper:2181" },
        { "name" : "ALLOW_ANONYMOUS_LOGIN", "value" : "yes" },
        { "name" : "ALLOW_PLAINTEXT_LISTENER", "value" : "yes" }
      ],
    },
    {
      name      = "email-service"
      image     = "my-email-image"
      essential = true
      cpu       = 512
      memory    = 1024
      portMappings = [
        {
          containerPort = 8090
          hostPort      = 8090
        }
      ]
      "environment" : [
        { "name" : "EMAIL_URL", "value" : "email-service" },
        { "name" : "EMAIL_PORT", "value" : "8090" },
        { "name" : "KAFKA_URL", "value" : "kafka-server" },
        { "name" : "KAFKA_PORT", "value" : "9092" },
      ]
    }
  ])
}

Answer 1

AS写在documentation:

Additionally, containers that belong to the same task can communicate over the localhost interface.

所以我的建议是使用 localhost 而不是服务名称。例如，您想为 Kafka 这样做，但也想为每个其他服务（例如电子邮件服务）这样做。

{ "name" : "KAFKA_CFG_ZOOKEEPER_CONNECT", "value" : "localhost:2181" },

在 ECS fargate 任务中解析服务主机名

resolve service hostname in ECS fargate task

amazon-web-services

amazon-ecs

docker

terraform

aws-fargate