如何修改Docker Compose配置让command: bash自动生效

问题分析 #

你遇到的情况是：容器启动后虽运行了bash，但Docker Desktop进入终端时默认调用了镜像自带的sh shell（表现为仅显示#提示符），而非你期望的bash环境。

解决方案 #

方案1：使用登录模式启动bash

将command改为bash -l，登录模式的bash会加载完整的环境配置，同时确保进入终端时直接处于bash环境：

version: "3.8"
services:
  service:
    container_name: pw-cont
    image: mcr.microsoft.com/playwright:v1.30.0-focal
    stdin_open: true          # -i
    tty: true                 # -t
    network_mode: host        # --network host
    volumes:                  # Ensures that updates in local/container are in sync
      - $PWD:/playwright/
    working_dir: /playwright
    command: bash -l

方案2：指定默认SHELL环境变量

添加environment字段设置默认shell为bash，Docker Desktop进入终端时会自动使用该shell：

version: "3.8"
services:
  service:
    container_name: pw-cont
    image: mcr.microsoft.com/playwright:v1.30.0-focal
    stdin_open: true          # -i
    tty: true                 # -t
    network_mode: host        # --network host
    volumes:                  # Ensures that updates in local/container are in sync
      - $PWD:/playwright/
    working_dir: /playwright
    environment:
      - SHELL=/bin/bash
    command: bash

方案3：覆盖镜像默认entrypoint

将entrypoint设置为bash，强制容器启动后直接运行bash：

version: "3.8"
services:
  service:
    container_name: pw-cont
    image: mcr.microsoft.com/playwright:v1.30.0-focal
    stdin_open: true          # -i
    tty: true                 # -t
    network_mode: host        # --network host
    volumes:                  # Ensures that updates in local/container are in sync
      - $PWD:/playwright/
    working_dir: /playwright
    entrypoint: bash

内容的提问来源于stack exchange，提问作者nakakapagpabagabag