php - 如何在不需要任何 PHP 脚本的情况下保持 PHP-CLI 容器运行？

Question

我一直在尝试使用 Docker 和 Docker Compose 构建一个 PHP cli 容器，我想让它保持事件状态，而不需要在其中运行任何 PHP 脚本。

我已经尝试了我自己的 Dockerfile:

FROM ubuntu:16.04
ENV PATH="/root/.composer/vendor/bin:${PATH}"

RUN apt-get update && \
    apt-get -y -qq install software-properties-common \
    xvfb \
    locales && \
    locale-gen en_US.UTF-8 && \
    export LC_ALL=en_US.UTF-8 && \
    export LANG=en_US.UTF-8 && \
    add-apt-repository ppa:ondrej/php && \
    apt-get update && \
    DEBIAN_FRONTEND=noninteractive apt-get -y --allow-unauthenticated install \
    php7.1-curl \
    php7.1-cli \
    php7.1-bcmath \
    php7.1-json \
    php7.1-intl \
    php7.1-mbstring \
    php7.1-mcrypt \
    php7.1-mysql \
    php7.1-xml \
    php7.1-xsl \
    php7.1-zip \
    curl \
    git \
    wget \
    pkg-config && \
    apt-get clean && \
    apt-get autoremove && \
    rm -rf /var/lib/apt/lists/*

COPY config /
RUN sh /usr/local/bin/install.sh
ENTRYPOINT bash -C '/entrypoint.sh';'bash'
CMD ["php", "-a"]

还有另一个(从 main PHP images 扩展):

FROM php:7-cli-alpine
ENV PATH="/root/.composer/vendor/bin:${PATH}"
COPY config /
RUN sh /usr/local/bin/install.sh
WORKDIR /var/wwww
CMD ["php", "-a"]

docker-compose.yml 只有这个:

version: '3.3'
services:
    webserver:
      build:
        context: .
      restart: on-failure
      env_file: .env
      environment:
          UID: ${UID}
          GID: ${GID}

最后here是包含所有内容的完整存储库，如果您想尝试一下。

问题是什么？通过运行 docker-compose up --build --force-recreate 构建容器后，它以代码 0 退出，但 docker-composer logs也没有帮助，因为它什么也没说。

查看命令行的以下输出(对于本文中的第二个 Dockerfile，因为第一个与更多内容几乎相同):

$ docker-compose up --build --force-recreate
Building webserver
Step 1/6 : FROM php:7-cli-alpine
7-cli-alpine: Pulling from library/php
90f4dba627d6: Pull complete
623a0217e4bc: Pull complete
ecbf507e7e3c: Pull complete
79a82dee0025: Pull complete
457716c6bb05: Pull complete
62e36287ffd0: Pull complete
507e98c003bc: Pull complete
b25e699baa37: Pull complete
Digest: sha256:ecae911bd22279d4883ffdc631afddc434641c67eedf49914fc62dafb5329663
Status: Downloaded newer image for php:7-cli-alpine
 ---> 1e563ea5f552
Step 2/6 : ENV PATH "/root/.composer/vendor/bin:${PATH}"
 ---> Running in 29b65c1d7def
 ---> d11c62bb5cf5
Removing intermediate container 29b65c1d7def
Step 3/6 : COPY config /
 ---> e42022d1de91
Step 4/6 : RUN sh /usr/local/bin/install.sh
 ---> Running in 749230f42e9e
All settings correct for using Composer
Downloading...

Composer (version 1.5.2) successfully installed to: /usr/local/bin/composer
Use it: php /usr/local/bin/composer

Changed current directory to /root/.composer
Loading composer repositories with package information
Updating dependencies
Package operations: 21 installs, 0 updates, 0 removals
  - Installing hirak/prestissimo (0.3.7): Downloading (100%)
  - Installing symfony/stopwatch (v3.3.10): Downloading (100%)
  - Installing symfony/process (v3.3.10): Downloading (100%)
  - Installing symfony/polyfill-php72 (v1.5.0): Downloading (100%)
  - Installing paragonie/random_compat (v2.0.11): Downloading (100%)
  - Installing symfony/polyfill-php70 (v1.5.0): Downloading (100%)
  - Installing symfony/options-resolver (v3.3.10): Downloading (100%)
  - Installing symfony/finder (v3.3.10): Downloading (100%)
  - Installing symfony/filesystem (v3.3.10): Downloading (100%)
  - Installing symfony/event-dispatcher (v3.3.10): Downloading (100%)
  - Installing psr/log (1.0.2): Downloading (100%)
  - Installing symfony/debug (v3.3.10): Downloading (100%)
  - Installing symfony/polyfill-mbstring (v1.5.0): Downloading (100%)
  - Installing symfony/console (v3.3.10): Downloading (100%)
  - Installing php-cs-fixer/diff (v1.1.0): Downloading (100%)
  - Installing gecko-packages/gecko-php-unit (v2.2): Downloading (100%)
  - Installing doctrine/lexer (v1.0.1): Downloading (100%)
  - Installing doctrine/annotations (v1.5.0): Downloading (100%)
  - Installing composer/semver (1.4.2): Downloading (100%)
  - Installing friendsofphp/php-cs-fixer (v2.7.1): Downloading (100%)
  - Installing squizlabs/php_codesniffer (3.1.0): Downloading (100%)
Writing lock file
Generating optimized autoload files
Cache directory does not exist (cache-vcs-dir): 
Clearing cache (cache-repo-dir): /root/.composer/cache/repo
Clearing cache (cache-files-dir): /root/.composer/cache/files
Clearing cache (cache-dir): /root/.composer/cache
All caches cleared.
 ---> ff310362f4a5
Removing intermediate container 749230f42e9e
Step 5/6 : WORKDIR /var/wwww
 ---> fe10fd52d6b6
Removing intermediate container 6e472a693c0c
Step 6/6 : CMD php -a
 ---> Running in 789688d1346a
 ---> b1286e96580b
Removing intermediate container 789688d1346a

Successfully built b1286e96580b
Successfully tagged dockerlamp_webserver:latest
Recreating dockerlamp_webserver_1 ... 
Recreating dockerlamp_webserver_1 ... done
Attaching to dockerlamp_webserver_1
webserver_1  | Interactive shell
webserver_1  | 
dockerlamp_webserver_1 exited with code 0

$ docker-compose logs
Attaching to dockerlamp_webserver_1
webserver_1  | Interactive shell
webserver_1  | 

如何在不需要运行 PHP 脚本的情况下保持容器运行？

Note: you might be asking why not just build php-fpm|apache but the thing is I do not need any webserver because the container will be used for a command line project only (which is a WIP)

Answer 1

您正在运行 php -a，这是一个 REPL，它需要交互式 TTY。所以你需要在你的撰写中启用那些

version: '3.3'
services:
    webserver:
      build:
        context: .
      restart: on-failure
      env_file: .env
      environment:
          UID: ${UID}
          GID: ${GID}
      tty: true
      stdin_open: true

稍后如果您需要附加到它来运行命令，您将需要使用 docker

docker attach <containernameOrID>