Faraday::ConnectionFailed使用docker在rails中使用弹性搜索

Question

我试图在消息模型中进行搜索功能，没有docker一切都很好，但当使用docker编译整个堆栈时，它给了我

"status": 500,
"error": "Internal Server Error",
"exception": "#<Faraday::ConnectionFailed wrapped=#<Errno::EADDRNOTAVAIL: Failed to open TCP connection to localhost:9200 (Cannot assign requested address - connect(2) for [::1]:9200)>>",

我dockercompose。yml '

version: "3.7"
services:
app:
build: .
command: bundle exec rails s -p 3000 -e development -b '0.0.0.0'
ports:
- 3000:3000
working_dir: /app
volumes:
- ./:/app
environment:
DB_USER: root
DB_NAME: insta-api
DB_PASSWORD: 123456789
DB_HOST: mysql
mysql:
image: mysql:5.7
volumes:
- insta-mysql-data:/var/lib/mysql
environment:
MYSQL_ROOT_PASSWORD: 123456789
MYSQL_DATABASE: insta-api
elasticsearch:
image: elasticsearch:7.17.6
hostname: "elasticsearch"
environment:
- discovery.type=single-node
ports:
- "9200:9200"
ulimits:
memlock:
soft: -1
hard: -1
nofile:
soft: 65536
hard: 65536
mem_limit: 1g
cap_add:
- IPC_LOCK

volumes:
insta-mysql-data:

'elasticsearch.rb

#./config/initializers 
config = {
host: "http://localhost:9200/",
transport_options: {
request: { timeout: 5 }
}
}

if File.exists?("config/elasticsearch.yml")
config.merge!(YAML.load_file("config/elasticsearch.yml")[Rails.env].deep_symbolize_keys)
end

Elasticsearch::Model.client = Elasticsearch::Client.new(config)

.yml

#./config
development: &default
host: 'http://localhost:9200/'
transport_options:
request:
timeout: !!integer 300
test:
<<: *default
staging:
<<: *default
production:
host: 'http://10.50.11.50/'
transport_options:
request:
timeout: !!integer 300

我试图使用docker运行rails mysql和弹性搜索所有堆栈。我尝试了很多版本的弹性搜索，还是出现了相同的错误。

Answer 1

我解决了这个问题，这是因为elasticsearch中的主机名。Yml和elasticsearch。我需要将主机转换为ENV['ELASTIC_HOST']，这是我在docker services.app的环境参数中确定的这是dockercompose文件

version: "3.7"
services:
app:
build: .
command: bundle exec rails s -p 3000 -e development -b '0.0.0.0'
ports:
- 3000:3000
working_dir: /app
volumes:
- ./:/app
environment:
DB_USER: root
DB_NAME: insta-api
DB_PASSWORD: 123456789
DB_HOST: mysql
ELASTIC_HOST: elasticsearch
mysql:
image: mysql:5.7
volumes:
- insta-mysql-data:/var/lib/mysql
environment:
MYSQL_ROOT_PASSWORD: 123456789
MYSQL_DATABASE: insta-api
elasticsearch:
image: elasticsearch:7.17.6
hostname: "elasticsearch"
environment:
- discovery.type=single-node
ports:
- 9200:9200 
volumes:
insta-mysql-data:

和elasticsearch.rb

config = {
host: ENV["ELASTIC_HOST"]
}
if File.exists?("config/elasticsearch.yml")
config.merge!(YAML.load_file("config/elasticsearch.yml")[Rails.env].deep_symbolize_keys)
end
Elasticsearch::Model.client = Elasticsearch::Client.new(config)

和elasticsearch.yml

development: &default
host: 'elasticsearch'
test:
<<: *default
production:
<<: *default

这可能很容易，但这是我第一次使用docker和其他东西。