ENV变量不通过godotenvDocker

我有一个用 Go、dockerised 和 gomod 编写的网络应用程序。

我无法让它读取环境变量。

运行 docker-compose up 时总是返回“Error getting env, not come through”

我正在使用 godotenv 来尝试这样做。下面是我的实现。我一生都无法弄清楚出了什么问题。如果有人能看到我遗漏的东西，你就救了一条命。

main.go、.env、docker-compose.yml 和 Dockerfile 都在项目的根目录下

main.go

func main() {
router := mux.NewRouter()
err := godotenv.Load()
if err != nil {
log.Fatalf("Error getting env, not comming through %v", err)
} else {
fmt.Println("We are getting the env values")
}
fmt.Println(os.Getenv("MY_ENV"))
}


.env

MY_ENV=thisismyenvvariable
DB_HOST=testdata123
DB_DRIVER=testdata123
DB_USER="testdata123"
DB_PASSWORD=testdata123
DB_NAME=testdata123
DB_PORT=5432


docker-compose.yml

version: '3'
services:
app:
container_name: template_123
build: .
ports:
- 8080:8080
restart: on-failure
volumes:
- api:/usr/src/app/
env_file:
- .env
depends_on:
- template-postgres
networks:
- template
template-postgres:
image: postgres:latest
container_name: startup_template_golang_db_postgres
environment:
- POSTGRES_USER=${DB_USER}
- POSTGRES_PASSWORD=${DB_PASSWORD}
- POSTGRES_DB=${DB_NAME}
- DATABASE_HOST=${DB_HOST}
ports:
- '5432:5432'
volumes:
- database_postgres:/var/lib/postgresql/data
env_file:
- .env
networks:
- template pgadmin:
image: dpage/pgadmin4
container_name: pgadmin_container
environment:
PGADMIN_DEFAULT_EMAIL: ${PGADMIN_DEFAULT_EMAIL}
PGADMIN_DEFAULT_PASSWORD: ${PGADMIN_DEFAULT_PASSWORD}
depends_on:
- template-postgres
ports:
- "5050:80"
networks:
- template
restart: unless-stopped
volumes:
api:
database_postgres:
# Networks to be created to facilitate communication between containers
networks:
startup_template:
driver: bridge


文件

# Start from golang base image
FROM golang:alpine as builder
# ENV GO111MODULE=on
# Add Maintainer info
LABEL maintainer="satoshi123"
# Install git.
# Git is required for fetching the dependencies.
RUN apk update && apk add --no-cache git
# Set the current working directory inside the container
WORKDIR /app
# Copy go mod and sum files
COPY go.mod go.sum ./
# Download all dependencies. Dependencies will be cached if the go.mod and the go.sum files are not changed
RUN go mod download
# Copy the source from the current directory to the working Directory inside the container
COPY . .
# Build the Go app
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .
# Start a new stage from scratch
FROM alpine:latest
RUN apk --no-cache add ca-certificates
WORKDIR /root/
# Copy the Pre-built binary file from the previous stage. Observe we also copied the .env file
COPY --from=builder /app/main .
# COPY --from=builder /app/.env .
# Expose port 8080 to the outside world
EXPOSE 8080
#Command to run the executable
CMD ["./main"]


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