从 ssh private EC2 我无法连接到我的 aws RDS Postgres 数据库

Question

运行以下命令后

docker run --rm \
    -it --name *****-db-setup \
    839*******.dkr.ecr.us-east-1.amazonaws.com/****-backend:dev-latest \
    bundle exec rake db:drop db:create db:migrate --trace

我得到了错误

** Invoke db:drop (first_time)
** Invoke db:load_config (first_time)
** Execute db:load_config
** Invoke db:check_protected_environments (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
PG::ConnectionBad: could not translate host name "db" to address: Name or service not known

知道这个连接错误可能来自哪里吗？如果我拿出一条线然后跑

docker run --rm \
    -it --name ****-db-setup \
    839*****.dkr.ecr.us-east-1.amazonaws.com/****-backend:dev-latest

我得到了 8 个错误

.env: line 1: $: command not found
.env: line 2: $: command not found
.env: line 3: $: command not found
.env: line 4: $: command not found
.env: line 5: $: command not found
.env: line 6: $: command not found
.env: line 7: $: command not found
.env: line 8: $: command not found

非常感谢任何见解。

config/database.yml

default: &default
  adapter: postgresql
  encoding: unicode
  host: <%= ENV.fetch("DB_HOST") { "db" } %>
  username: <%= ENV.fetch("DB_USER") { "postgres" } %>
  port: <%= ENV["DB_PORT"] %>
  password: <%= ENV["DB_PASS"] %>
  # For details on connection pooling, see Rails configuration guide
  # http://guides.rubyonrails.org/configuring.html#database-pooling
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>

development:
  <<: *default
  database: backend_development

test:
  <<: *default
  database: backend_test

production:
  <<: *default
  database: <%= ENV["DB_NAME"] %>

    enter code here

Answer 1

您可以在此处检查几个步骤来解决此问题，

1. 检查我们的路由表以确保您的路由正确。
2. 检查 EC2 和 RDS 中的安全组，确保它们允许相关端口连接到相关源。
3. 检查您的 NACL（网络 ACL）列表。