如果容器无法启动，如何检查容器中的文件内容？

Question

我正在尝试构建一个php国际象棋应用程序，并将其包装在Docker容器中。起初，我使用了旧的docker配置，但它不起作用，所以我在上面添加了一些内容（比如将config apache文件复制到容器中等等）。重点是-I copyapache2/ports。conf放入只包含一行代码的容器中。但是在运行容器之后，它显示第5行有错误。当我在运行之前查看文件的内容时，它显示它只包含1行，所以我感到困惑。在回购（下面的链接）中，我有这个文件。

-> % docker start -a chess_php_1
[Tue Sep 13 18:25:20.097378 2022] [so:warn] [pid 1] AH01574: module access_compat_module is already loaded, skipping
[Tue Sep 13 18:25:20.097542 2022] [so:warn] [pid 1] AH01574: module alias_module is already loaded, skipping
[Tue Sep 13 18:25:20.097582 2022] [so:warn] [pid 1] AH01574: module auth_basic_module is already loaded, skipping
[Tue Sep 13 18:25:20.097626 2022] [so:warn] [pid 1] AH01574: module authn_core_module is already loaded, skipping
[Tue Sep 13 18:25:20.097672 2022] [so:warn] [pid 1] AH01574: module authn_file_module is already loaded, skipping
[Tue Sep 13 18:25:20.097716 2022] [so:warn] [pid 1] AH01574: module authz_core_module is already loaded, skipping
[Tue Sep 13 18:25:20.097757 2022] [so:warn] [pid 1] AH01574: module authz_host_module is already loaded, skipping
[Tue Sep 13 18:25:20.097805 2022] [so:warn] [pid 1] AH01574: module authz_user_module is already loaded, skipping
[Tue Sep 13 18:25:20.097859 2022] [so:warn] [pid 1] AH01574: module autoindex_module is already loaded, skipping
[Tue Sep 13 18:25:20.097909 2022] [so:warn] [pid 1] AH01574: module deflate_module is already loaded, skipping
[Tue Sep 13 18:25:20.097960 2022] [so:warn] [pid 1] AH01574: module dir_module is already loaded, skipping
[Tue Sep 13 18:25:20.098011 2022] [so:warn] [pid 1] AH01574: module env_module is already loaded, skipping
[Tue Sep 13 18:25:20.098056 2022] [so:warn] [pid 1] AH01574: module filter_module is already loaded, skipping
[Tue Sep 13 18:25:20.098106 2022] [so:warn] [pid 1] AH01574: module mime_module is already loaded, skipping
[Tue Sep 13 18:25:20.098151 2022] [so:warn] [pid 1] AH01574: module mpm_prefork_module is already loaded, skipping
[Tue Sep 13 18:25:20.098195 2022] [so:warn] [pid 1] AH01574: module negotiation_module is already loaded, skipping
[Tue Sep 13 18:25:20.098241 2022] [so:warn] [pid 1] AH01574: module php7_module is already loaded, skipping
[Tue Sep 13 18:25:20.098286 2022] [so:warn] [pid 1] AH01574: module reqtimeout_module is already loaded, skipping
[Tue Sep 13 18:25:20.098325 2022] [so:warn] [pid 1] AH01574: module rewrite_module is already loaded, skipping
[Tue Sep 13 18:25:20.098367 2022] [so:warn] [pid 1] AH01574: module setenvif_module is already loaded, skipping
[Tue Sep 13 18:25:20.098406 2022] [so:warn] [pid 1] AH01574: module status_module is already loaded, skipping
[Tue Sep 13 18:25:20.100451 2022] [alias:warn] [pid 1] AH00671: The Alias directive in /etc/apache2/mods-enabled/alias.conf at line 14 will probably never match because it overlaps an earlier Alias.
AH00526: Syntax error on line 5 of /etc/apache2/ports.conf:

这是我运行容器后得到的errro。重现步骤：

1. 下载项目https://github.com/ShadowFlade/chess
2. 在它的根目录中执行docker-compose-up如果您安装了dockerand ，则上述所有操作都是可执行的。我的第一个问题，希望我做得好。附言：如果你对如何在这个项目中更好地使用docker有什么建议，我洗耳恭听

Answer 1

要进行故障排除，可以使用bash实例启动构建的docker映像，如下所示：

# docker images # get docker image id
docker run --rm -it --entrypoint bash <docker-image-id>

导航到配置文件夹并检查配置文件是否存在及其内容是否正确。

Answer 2

据我所知，您可以使用自定义命令启动单个容器，例如：
docker 运行my_container睡眠n_seconds其中my_container是容器的名称，n_seconds是容器保持Hibernate状态的时间。
你可以用 docker exec 来查看容器 - 它my_container /bin/bash。

但是，如果docker合成文件中的PHP容器在某种程度上依赖于其他容器，那么这可能不会起作用
然后，您可以尝试将：命令：sleep n_seconds添加到docker compose中的容器中，并像往常一样使用docker-compose-up或 启动它，然后查看容器。

来源：
Docker Compose保持容器运行
https://devopscube.com/keep-docker-container-running/