启动容器进程导致：exec：“uvicorn”：$PATH 中找不到可执行文件：未知

Question

我正在尝试 Dockerize 我的 FastApi 应用程序，但在运行命令后它立即崩溃并出现此错误：

docker-compose -f local.yml up -d

有人可以帮我吗？

Dockerfile：

FROM python:3.6.11-alpine3.11
ARG MYSQL_SERVER
ARG POSTGRES_SERVER
ENV ENVTYPE=local
ENV PYTHONUNBUFFERED 1
ENV APP_HOME=/home/app/web
RUN mkdir -p $APP_HOME
WORKDIR $APP_HOME

RUN apk update && apk add --no-cache bash
ADD /compose/scripts.sh $APP_HOME
ADD /requirements/$ENVTYPE.txt $APP_HOME
RUN chmod +x scripts.sh

RUN ./scripts.sh
RUN pip install -r /home/app/web/$ENVTYPE.txt; mkdir /log;

COPY /src/ $APP_HOME
CMD ["uvicorn", "app.main:app", "--reload", "--host", "0.0.0.0", "--port", "8080"]

local.yml 文件：

version: '3.7'
services:
  nginx:
    env_file: .env
    build: 
      context: .
      dockerfile: ./compose/local/nginx.Dockerfile
    restart: always
    ports:
       - "${EX_PORT_NGINX:-8030}:80"
    volumes:
       - ./nginx/site.conf:/etc/nginx/conf.d/default.conf
  core:
    env_file: .env
    build: 
      context: .
      dockerfile: ./compose/local/core.Dockerfile
      args:
        MYSQL_SERVER: ${MYSQL_SERVER:-}
        POSTGRES_SERVER: ${POSTGRES_SERVER:-}
    restart: always
    volumes:
       - ./src:/home/app/web/
    logging:
       driver: "json-file"
       options:
          max-size: "5m"
          max-file: "10"

错误：

Cannot start service core: failed to create shim: OCI runtime create failed: container_linux.go:380: starting container process caused: exec: "uvicorn": executable file not found in $PATH: unknown

Answer 1

就我而言，我添加了命令poetry run并且它有效。

services:
 api:

  ...

  command: [
    "poetry", "run",
    "uvicorn",
    "app:main",
    "--port", "5000"
  ]

Answer 2

您需要 pip 安装 fastapi 和 uvicorn：

FROM python:latest

WORKDIR /app

COPY requirements.txt ./

RUN pip install --no-cache-dir --upgrade -r requirements.txt
RUN pip install fastapi uvicorn

COPY main.py ./

CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "80"]

或者包含在requirements.txt中：

fastapi>=0.68.0,<0.69.0
pydantic>=1.8.0,<2.0.0
uvicorn>=0.15.0,<0.16.0

Answer 3

添加到 Dockerfile 之前 ENV PATH /home/${USERNAME}/.local/bin:${PATH}， 替换为容器用户。
RUN pip install -r /home/app/web/$ENVTYPE.txt; mkdir /log;
${USERNAME}

如果您不知道当前用户，请RUN echo $(python3 -m site --user-base)在 Dockerfile 中的某个位置添加。然后复制该输出echo以替换/home/${USERNAME}/.local.