英文:
dial tcp 127.0.0.1:8080: connect: connection refused. go docker app
问题
我有两个用Go语言编写的应用程序。首先是user_management应用程序,我首先运行(docker-compose up --build),然后运行(docker-compose up --build)sport_app。sport_app依赖于user_management应用程序。
sport_app的Dockerfile文件如下所示。
FROM golang:alpine
RUN apk update && apk upgrade && apk add --no-cache bash git openssh curl
WORKDIR /go-sports-entities-hierarchy
COPY . /go-sports-entities-hierarchy/
RUN rm -rf /go-sports-entities-hierarchy/.env
RUN go mod download
RUN chmod +x /go-sports-entities-hierarchy/scripts/*
RUN ./scripts/build.sh
ADD https://github.com/ufoscout/docker-compose-wait/releases/download/2.2.1/wait /wait
RUN chmod +x /wait
ENV GIN_MODE="debug" \
GQL_SERVER_HOST="localhost" \
GQL_SERVER_PORT=7777 \
ALLOWED_ORIGINS=* \
USER_MANAGEMENT_SERVER_URL="http://localhost:8080/user/me" \
# GQLGen config
GQL_SERVER_GRAPHQL_PATH="graphql" \
GQL_SERVER_GRAPHQL_PLAYGROUND_ENABLED=true \
GQL_SERVER_GRAPHQL_PLAYGROUND_PATH="playground" \
# Export necessary port
EXPOSE 7777
CMD /wait && ./scripts/run.sh
sport_app的docker-compose.yml文件如下所示。
version: '3'
volumes:
postgres_data:
driver: local
services:
go-sports-entities-hierarchy:
restart: always
build:
dockerfile: Dockerfile
context: .
environment:
WAIT_HOSTS: postgres:5432
# Web framework config
GIN_MODE: debug
GQL_SERVER_HOST: go-sports-entities-hierarchy
GQL_SERVER_PORT: 7777
ALLOWED_ORIGINS: "*"
USER_MANAGEMENT_SERVER_URL: http://localhost:8080/user/me
# GQLGen config
GQL_SERVER_GRAPHQL_PATH: graphql
GQL_SERVER_GRAPHQL_PLAYGROUND_ENABLED: "true"
GQL_SERVER_GRAPHQL_PLAYGROUND_PATH: playground
ports:
- 7777:7777
depends_on:
- postgres
- redisearch
go-sports-events-workflow:
restart: always
build:
dockerfile: Dockerfile
context: .
environment:
WAIT_HOSTS: postgres:5432
# Web framework config
GIN_MODE: debug
GQL_SERVER_HOST: go-sports-events-workflow
GQL_SERVER_PORT: 7778
ALLOWED_ORIGINS: "*"
# GQLGen config
GQL_SERVER_GRAPHQL_PATH: graphql
GQL_SERVER_GRAPHQL_PLAYGROUND_ENABLED: "true"
GQL_SERVER_GRAPHQL_PLAYGROUND_PATH: playground
depends_on:
- postgres
- redisearch
- go-sports-entities-hierarchy
user_management应用程序的Dockerfile文件如下所示。
FROM golang:alpine
RUN apk update && apk add --no-cache git ca-certificates && update-ca-certificates
# Set necessary environmet variables needed for our image
ENV GO111MODULE=on \
CGO_ENABLED=0 \
GOOS=linux \
GOARCH=amd64
# Move to working directory /build
WORKDIR /build
# Copy and download dependency using go mod
COPY go.mod .
COPY go.sum .
RUN go mod download
# Copy the code into the container
COPY . .
# Build the application
RUN go build -o main .
# Move to /dist directory as the place for resulting binary folder
WORKDIR /dist
# Copy binary from build to main folder
RUN cp -r /build/html .
RUN cp /build/main .
# Environment Variables
ENV DB_HOST="127.0.0.1" \
APP_PROTOCOL="http" \
APP_HOST="localhost" \
APP_PORT=8080 \
ALLOWED_ORIGINS="*"
# Export necessary port
EXPOSE 8080
ADD https://github.com/ufoscout/docker-compose-wait/releases/download/2.2.1/wait /wait
RUN chmod +x /wait
# Command to run when starting the container
CMD /wait && /dist/main
user_management应用程序的docker-compose.yml文件如下所示。
version: '3'
volumes:
postgres_data:
driver: local
services:
postgres:
image: postgres
volumes:
- postgres_data:/var/lib/postgresql/data
ports:
- 5432:5432
go-user-management:
restart: always
build:
dockerfile: Dockerfile
context: .
environment:
# Postgres Details
DB_PORT: 5432
# APP details
APP_PROTOCOL: http
APP_HOST: localhost
APP_PORT: 8080
# System Configuration Details
ALLOWED_ORIGINS: "*"
ports:
- 8080:8080
depends_on:
- postgres
在sport_app中,我编写了以下代码并出现错误:
client := resty.New()
resp, err := client.R().SetHeader("Content-Type", "application/json").SetHeader("Authorization", "Bearer "+token).Get("http://localhost:8080/user/me")
错误是:Get "http://localhost:8080/user/me": dial tcp 127.0.0.1:8080: connect: connection refused
这个API(http://localhost:8080/user/me)是在user_management应用程序中编写的,并且它是正常工作的,我用Postman进行了检查。
我已经阅读了这个问题answers,但无法解决我的问题。
我对Docker还不熟悉,请帮忙解决。
英文:
I have two apps in go language. user_management app, which I run (docker-compose up --build) first, then I run(docker-compose up --build) sport_app. sport_app is dependent from user_management app.
sport_app Dockerfile file as below.
FROM golang:alpine
RUN apk update && apk upgrade && apk add --no-cache bash git openssh curl
WORKDIR /go-sports-entities-hierarchy
COPY . /go-sports-entities-hierarchy/
RUN rm -rf /go-sports-entities-hierarchy/.env
RUN go mod download
RUN chmod +x /go-sports-entities-hierarchy/scripts/*
RUN ./scripts/build.sh
ADD https://github.com/ufoscout/docker-compose-wait/releases/download/2.2.1/wait /wait
RUN chmod +x /wait
ENV GIN_MODE="debug" \
GQL_SERVER_HOST="localhost" \
GQL_SERVER_PORT=7777 \
ALLOWED_ORIGINS=* \
USER_MANAGEMENT_SERVER_URL="http://localhost:8080/user/me" \
# GQLGen config
GQL_SERVER_GRAPHQL_PATH="graphql" \
GQL_SERVER_GRAPHQL_PLAYGROUND_ENABLED=true \
GQL_SERVER_GRAPHQL_PLAYGROUND_PATH="playground" \
# Export necessary port
EXPOSE 7777
CMD /wait && ./scripts/run.sh
sport_app docker-compose.yml file as below.
version: '3'
volumes:
postgres_data:
driver: local
services:
go-sports-entities-hierarchy:
restart: always
build:
dockerfile: Dockerfile
context: .
environment:
WAIT_HOSTS: postgres:5432
# Web framework config
GIN_MODE: debug
GQL_SERVER_HOST: go-sports-entities-hierarchy
GQL_SERVER_PORT: 7777
ALLOWED_ORIGINS: "*"
USER_MANAGEMENT_SERVER_URL: http://localhost:8080/user/me
# GQLGen config
GQL_SERVER_GRAPHQL_PATH: graphql
GQL_SERVER_GRAPHQL_PLAYGROUND_ENABLED: "true"
GQL_SERVER_GRAPHQL_PLAYGROUND_PATH: playground
ports:
- 7777:7777
depends_on:
- postgres
- redisearch
go-sports-events-workflow:
restart: always
build:
dockerfile: Dockerfile
context: .
environment:
WAIT_HOSTS: postgres:5432
# Web framework config
GIN_MODE: debug
GQL_SERVER_HOST: go-sports-events-workflow
GQL_SERVER_PORT: 7778
ALLOWED_ORIGINS: "*"
# GQLGen config
GQL_SERVER_GRAPHQL_PATH: graphql
GQL_SERVER_GRAPHQL_PLAYGROUND_ENABLED: "true"
GQL_SERVER_GRAPHQL_PLAYGROUND_PATH: playground
depends_on:
- postgres
- redisearch
- go-sports-entities-hierarchy
user_management app Dockerfile as below:
FROM golang:alpine
RUN apk update && apk add --no-cache git ca-certificates && update-ca-certificates
# Set necessary environmet variables needed for our image
ENV GO111MODULE=on \
CGO_ENABLED=0 \
GOOS=linux \
GOARCH=amd64
# Move to working directory /build
WORKDIR /build
# Copy and download dependency using go mod
COPY go.mod .
COPY go.sum .
RUN go mod download
# Copy the code into the container
COPY . .
# Build the application
RUN go build -o main .
# Move to /dist directory as the place for resulting binary folder
WORKDIR /dist
# Copy binary from build to main folder
RUN cp -r /build/html .
RUN cp /build/main .
# Environment Variables
ENV DB_HOST="127.0.0.1" \
APP_PROTOCOL="http" \
APP_HOST="localhost" \
APP_PORT=8080 \
ALLOWED_ORIGINS="*"
# Export necessary port
EXPOSE 8080
ADD https://github.com/ufoscout/docker-compose-wait/releases/download/2.2.1/wait /wait
RUN chmod +x /wait
# Command to run when starting the container
CMD /wait && /dist/main
user_management app docker-compose.yml file as below:
version: '3'
volumes:
postgres_data:
driver: local
services:
postgres:
image: postgres
volumes:
- postgres_data:/var/lib/postgresql/data
ports:
- 5432:5432
go-user-management:
restart: always
build:
dockerfile: Dockerfile
context: .
environment:
# Postgres Details
DB_PORT: 5432
# APP details
APP_PROTOCOL: http
APP_HOST: localhost
APP_PORT: 8080
# System Configuration Details
ALLOWED_ORIGINS: "*"
ports:
- 8080:8080
depends_on:
- postgres
In sport_app I write below code and get error:
client := resty.New()
resp, err := client.R().SetHeader("Content-Type", "application/json").SetHeader("Authorization", "Bearer "+token).Get("http://localhost:8080/user/me")
Error is: Get "http://localhost:8080/user/me": dial tcp 127.0.0.1:8080: connect: connection refused:"
This API(http://localhost:8080/user/me) is written in the user_management app and this is working, I check with the postman.
I already read this question answers, but can not solve my problem.
I am new to docker, please help.
答案1
得分: 7
用于在多个docker-compose
客户端之间进行通信,您需要确保要相互通信的容器位于同一网络中。
例如,(为简洁起见进行了编辑)这里有一个docker-compose.yml
示例:
# sport_app docker-compose.yml
version: '3'
services:
go-sports-entities-hierarchy:
...
networks:
- some-net
go-sports-events-workflow
...
networks:
- some-net
networks:
some-net:
driver: bridge
和另一个docker-compose.yml
:
# user_management app docker-compose.yml
version: '3'
services:
postgres:
...
networks:
- some-net
go-user-management
...
networks:
- some-net
networks:
some-net:
external: true
注意:您的应用程序的网络根据项目名称
命名,该名称基于其所在目录的名称,在本例中添加了前缀user_
。
然后,它们可以使用服务名称进行通信,例如go-user-management
等。
您可以在运行docker-compose up --build
命令后运行docker network ls
命令来查看它,然后运行docker network inspect bridge
等命令。
英文:
For communicating between multiple docker-compose
clients, you need to make sure that the containers you want to talk to each other are on the same network.
For example, (edited for brevity) here you have one of the docker-compose.yml
# sport_app docker-compose.yml
version: '3'
services:
go-sports-entities-hierarchy:
...
networks:
- some-net
go-sports-events-workflow
...
networks:
- some-net
networks:
some-net:
driver: bridge
And the other docker-compose.yml
# user_management app docker-compose.yml
version: '3'
services:
postgres:
...
networks:
- some-net
go-user-management
...
networks:
- some-net
networks:
some-net:
external: true
Note: Your app’s network is given a name based on the project name
, which is based on the name of the directory it lives in, in this case a prefix user_
was added.
They can then talk to each other using the service name, i.e. go-user-management
, etc.
You can, after running the docker-compose up --build
commands, run the docker network ls
command to see it, then docker network inspect bridge
, etc.
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库,让每个人都能够通过互相帮助和分享经验来进步。
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