Docker 组合容器相互达到构建时间
Docker compose containers reach each other build time
我有一个 wordpress docker-compose，其中包含 3 个服务。
1 - php,apache
2 - mysql
3 - php我的管理员
我想做的是在构建时安装 wordpress 核心和插件，
原因很明显，我不想每次重新启动容器时都重新执行所有步骤并安装插件和...。所以我需要连接到数据库，但似乎构建时间我无法访问我的 mysql 容器。
我在某处读到我需要在构建阶段指定网络，但我无法让它工作。
这是我的 docker-compose 文件：
version: '3.8'
volumes:
mhndev_systems_mysql_data:
mhndev_systems_wp_uploads:
networks:
mhndev_network:
services:
## --------------------------------------------
## | 1: Wordpress
## --------------------------------------------
mhndev_systems_wp:
build:
context: .
dockerfile: docker/Dockerfile
args:
WP_VERSION: ${WP_VERSION}
MYSQL_HOST: ${MYSQL_HOST}
MYSQL_PORT: ${MYSQL_PORT}
MYSQL_DATABASE_NAME: ${MYSQL_DATABASE_NAME}
MYSQL_USERNAME: ${MYSQL_USERNAME}
MYSQL_PASSWORD: ${MYSQL_PASSWORD}
SITE_URL: ${SITE_URL}
DB_TABLE_PREFIX: ${DB_TABLE_PREFIX}
ENV: ${ENV}
UID: ${UID}
GID: ${GID}
SITE_TITLE: ${SITE_TITLE}
SITE_ADMIN_USERNAME: ${SITE_ADMIN_USERNAME}
SITE_ADMIN_PASSWORD: ${SITE_ADMIN_PASSWORD}
SITE_ADMIN_EMAIL: ${SITE_ADMIN_EMAIL}
network: "mhndev_network"
ports:
- 8191:80
env_file:
- .env
volumes:
- ./themes/dt-the7-child:/var/www/html/wp-content/themes/dt-the7-child
- ./plugins/teamcity:/var/www/html/wp-content/plugins/teamcity
- mhndev_systems_wp_uploads:/var/www/html/wp-content/uploads
depends_on:
- mhndev_systems_mysql
networks:
- mhndev_network
## --------------------------------------------
## | 2: Mysql
## --------------------------------------------
mhndev_systems_mysql:
image: mysql:5.7.21
environment:
MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD}
MYSQL_DATABASE: ${MYSQL_DATABASE_NAME}
MYSQL_USER: ${MYSQL_USERNAME}
MYSQL_PASSWORD: ${MYSQL_PASSWORD}
volumes:
- mhndev_systems_mysql_data:/var/lib/mysql
networks:
- mhndev_network
## --------------------------------------------
## | 3: PhpMyAdmin
## --------------------------------------------
mhndev_systems_phpmyadmin:
image: phpmyadmin/phpmyadmin:5.0.2
depends_on:
- mhndev_systems_mysql
ports:
- "7191:80"
environment:
PMA_HOST: mhndev_systems_mysql
networks:
- mhndev_network
这是我的 Dockerfile :
FROM php:7.4-apache
ARG WP_VERSION=5.5.1
RUN apt-get update && apt-get install -y \
sendmail \
libpng-dev \
libjpeg-dev \
libfreetype6-dev \
netcat \
gnupg \
libzip-dev \
zip \
&& docker-php-ext-configure gd --with-freetype --with-jpeg \
&& docker-php-ext-install gd pdo_mysql zip \
&& docker-php-ext-install mysqli && docker-php-ext-enable mysqli
ADD ./docker/apache.conf /etc/apache2/sites-enabled/000-default.conf
RUN \
printf "\nServerName localhost" >> /etc/apache2/apache2.conf &&\
a2enmod rewrite expires
### install wp cli
RUN curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar &&\
chmod +x wp-cli.phar &&\
mv wp-cli.phar /usr/local/bin/wp
WORKDIR /var/www/html
RUN wp core download --allow-root
### copy plugins and themes and php config files to container
COPY ["./plugins/*.zip", "/docker/plugins/"]
COPY ["./themes/*.zip", "/docker/themes/"]
COPY ./themes/dt-the7-child /var/www/html/wp-content/themes/dt-the7-child
COPY ./plugins/teamcity /var/www/html/wp-content/plugins/teamcity
COPY ./docker/php.ini /usr/local/etc/php/php.ini
COPY ./docker/wp-config.php /var/www/html/wp-config.php
COPY ["./plugins/plugins_*.txt", "/docker/plugins/"]
COPY ["./uploads/", "/docker/uploads/"]
COPY ["./docker/commands/*.sh", "/docker/bin/"]
RUN chmod a+x /docker/bin/*.sh
RUN /bin/bash -c "source /docker/bin/setup-theme-plugins.sh"
RUN chown -R www-data:www-data /var/www/html/
CMD apachectl -D FOREGROUND
这里有一个bash文件(setup-theme-plugins.sh)，负责安装wordpress核心和插件
#!/bin/bash
echo '-------------------whoami--------------------'
echo $(whoami)
echo '---------------------------------------------'
printf "3[0;32m > Waiting for mysql ...\x1b[0m \n"
until nc -z -v -w30 "$MYSQL_HOST" "$MYSQL_PORT"
do
echo "Waiting for database connection..."
# wait for 5 seconds before check again
sleep 1
done
printf "3[0;32m >Mysql is ready ...\x1b[0m \n"
echo '---------------------------------------------'
printf "3[0;32m > Copy wordpress uploads if not exists (usually first time ) \x1b[0m \n"
FILE=/var/www/html/wp-content/uploads/2020/01/dell.jpg
if [ -f "$FILE" ]; then
echo "$FILE exists, so no need to copy uploads"
else
echo "$FILE does not exist, copying ..."
cp -r /docker/uploads/* /var/www/html/wp-content/uploads
fi
echo '---------------------------------------------'
sed -i s/__DB_NAME__/"${MYSQL_DATABASE_NAME}"/g /var/www/html/wp-config.php
sed -i s/__DB_USER__/"${MYSQL_USERNAME}"/g /var/www/html/wp-config.php
sed -i s/__DB_PASSWORD__/"${MYSQL_PASSWORD}"/g /var/www/html/wp-config.php
sed -i s/__DB_HOST__/"${MYSQL_HOST}"/g /var/www/html/wp-config.php
sed -i s/__SITE_URL__/"${SITE_URL}"/g /var/www/html/wp-config.php
if [[ -n "${DB_TABLE_PREFIX}" ]]; then
sed -i s/__DB_TABLE_PREFIX__/"${DB_TABLE_PREFIX}"/g /var/www/html/wp-config.php
else
sed -i s/__DB_TABLE_PREFIX__/"${DB_TABLE_PREFIX}"/g /var/www/html/wp-config.php
fi
### set WP_DEBUG, SCRIPT_DEBUG based on DEV environment variable
if [ "${ENV}" = "dev" ]; then
sed -i s/__WP_DEBUG__/true/g /var/www/html/wp-config.php
sed -i s/__SCRIPT_DEBUG__/true/g /var/www/html/wp-config.php
else
sed -i s/__WP_DEBUG__/false/g /var/www/html/wp-config.php
sed -i s/__SCRIPT_DEBUG__/false/g /var/www/html/wp-config.php
fi
wp option update home "${SITE_URL}" --allow-root
wp option update siteurl "${SITE_URL}" --allow-root
### set WP_DEBUG_LOG to php://stdout to always output logs to stdout so be available for docker logs
old_string='__WP_DEBUG_LOG__'
new_string='php://stdout'
sed -i "s%$old_string%$new_string%g" /var/www/html/wp-config.php
if [[ -n "${SITE_ADMIN_USERNAME}" ]]; then
DASHBOARD_USER_NAME="${SITE_ADMIN_USERNAME}"
else
DASHBOARD_USER_NAME="admin"
fi
if [[ -n "${UID}" ]]; then
usermod -u "${UID}" www-data
groupmod -g "${GID}" www-data
fi
chown -R www-data:www-data /var/www/html/
### install wordpress
printf "3[0;32m > Checking if wordpress core installed, if not Installing it ...\x1b[0m \n"
wp core is-installed --allow-root
retVal=$?
if [ "$retVal" == "1" ];then
printf "3[0;32m > Trying to Install wordpress ...\x1b[0m \n"
printf "3[0;32m > Command to execute is : wp core install --url="${SITE_URL}" --title="${SITE_TITLE}" --admin_user="${DASHBOARD_USER_NAME}" --admin_password="${SITE_ADMIN_PASSWORD}" --admin_email="${SITE_ADMIN_EMAIL}" --allow-root ...\x1b[0m \n"
wp core install --url="${SITE_URL}" --title="${SITE_TITLE}" --admin_user="${DASHBOARD_USER_NAME}" --admin_password="${SITE_ADMIN_PASSWORD}" --admin_email="${SITE_ADMIN_EMAIL}" --allow-root
fi
echo '---------------------------------------------'
### install The7 theme from zip file
# shellcheck disable=SC2059
printf "3[0;32m > Checking if theme: $FILE installed, if not Installing it ...\x1b[0m \n"
wp theme is-installed The7 --allow-root
is_theme_installed=$?
if [[ is_theme_installed -eq 1 || ! -d /var/www/html/wp-content/themes/dt-the7 ]]; then
rm -rf /var/www/html/wp-content/themes/dt-the7
wp theme install /docker/themes/dt-the7.zip --force --allow-root;
fi
echo '---------------------------------------------'
### install plugins from plugins_dev.txt or plugins_prod.txt based on environment
# shellcheck disable=SC2162
while read line; do
IFS='=' read -r -a array <<< "$line"
printf "3[0;32m > Checking if plugin:%s is installed else Installing %s:%s ...\x1b[0m \n" "${array[0]}" "${array[0]}" "${array[1]}"
# if wp plugin is-installed "${array[0]}" --allow-root; then
wp plugin install "${array[0]}" --version="${array[1]}" --activate --force --allow-root
# fi
echo '---------------------------------------------'
done < /docker/plugins/plugins_"${ENV}".txt
### install plugins from zip file
for FILE in /docker/plugins/*.zip;
do
# shellcheck disable=SC2059
printf "3[0;32m > Installing plugin $FILE ...\x1b[0m \n"
wp plugin install "$FILE" --force --allow-root;
echo '---------------------------------------------'
done
printf "3[0;32m > Checking if hello plugin exist and if so uninstall it ...\x1b[0m \n"
#if ! wp plugin is-installed hello --allow-root; then
wp plugin uninstall hello --allow-root
#fi
echo '---------------------------------------------'
printf "3[0;32m > Checking if akismet plugin exist and if so uninstall it ...\x1b[0m \n"
#if ! wp plugin is-installed akismet --allow-root; then
wp plugin uninstall akismet --allow-root
#fi
echo '---------------------------------------------'
printf "3[0;32m > activating the7 child theme ...\x1b[0m \n"
wp theme activate dt-the7-child --allow-root
echo '---------------------------------------------'
printf "3[0;32m > Uninstalling initial themes ...\x1b[0m \n"
#if ! wp theme is-installed twentynineteen --allow-root; then
wp theme delete twentynineteen --allow-root
#fi
echo '---------------------------------------------'
#if ! wp theme is-installed twentyseventeen --allow-root; then
wp theme delete twentyseventeen --allow-root
#fi
echo '---------------------------------------------'
#if ! wp theme is-installed twentytwenty --allow-root; then
wp theme delete twentytwenty --allow-root
#fi
echo '---------------------------------------------'
正如您在我的 bash 文件中看到的那样，我正在连接到 mysql 容器。
我怎样才能做到这一点？
我的猜测是您无法连接，因为数据库服务已启动但尚未就绪。在 the docker documentation on depends_on 中说明了这一点（我也遇到过这个问题）：
depends_on does not wait for db and redis to be “ready” before starting web - only until they have been started. If you need to wait for a service to be ready, see Controlling startup order for more on this problem and strategies for solving it.
（强调我的）
在我的例子中，我以一种非常丑陋的方式解决了它（在我的 python 脚本中有一个 sleep() 10 秒），但如果这对你来说没有解决方案，也许官方策略文档 found here 可能会有帮助。
[编辑]
你用什么作为主机变量名？在 docker compose 中使用网络时，机器应该能够使用它们的容器名称相互通信（即 mhndev_systems_mysql 在您的情况下）。你能试试吗？
您根本无法从 Docker 文件连接到数据库。
其中一部分是图像工作原理的基本 Docker 模型。 Docker 镜像仅包含一个文件系统和一些描述如何从中启动容器的元数据；您可以将其复制到不同的系统并在那里 运行。如果您构建了一个图像并尝试更新数据库作为它的一部分，然后 运行 在不同的系统上使用相同的图像，它不会有数据库设置；同样，你可以删除并重新创建本地数据库而不用重建图像，你不会有任何数据库内容。
从机制上讲，docker build 步骤（或其等效的 Compose）运行 在受限环境中。最值得注意的是，它没有连接到任何 Compose 网络，因此没有网络设置来解析像 mhndev_systems_mysql 这样的主机名。 （从技术上讲，它位于 default bridge network 上，与 Compose default 网络或您为构建容器指定的任何 networks: 不同。）
在典型的应用程序中，您希望将“应用程序代码”与“数据库设置”分开。当应用程序启动时，您必须 运行 database-setup 部分（通常是“迁移”），或者与启动应用程序分开；但你不能在构建时这样做。
构建时间和运行时间之间存在一个简单的误解；所有容器将在 运行 时间内可用，而不是构建时间。因此，在构建时无法访问您的 MySQL 容器。
我的建议是从你的 Dockerfile 中删除所有需要 MySQL 的步骤并将它们移动到你的入口点，然后在你的 Dockerfile 中设置一个布尔值 ENV 并在你的入口点开始时检查该值 运行 您的命令，如果您将该 ENV 设置为 true；现在，如果您需要 运行 您的入口点（也就是设置您的 WP & MySQL），只需在构建时传递该 ENV。
docker build --build-arg var_name=${VARIABLE_NAME}
我有一个 wordpress docker-compose，其中包含 3 个服务。
1 - php,apache
2 - mysql
3 - php我的管理员
我想做的是在构建时安装 wordpress 核心和插件， 原因很明显，我不想每次重新启动容器时都重新执行所有步骤并安装插件和...。所以我需要连接到数据库，但似乎构建时间我无法访问我的 mysql 容器。 我在某处读到我需要在构建阶段指定网络，但我无法让它工作。 这是我的 docker-compose 文件：
version: '3.8'
volumes:
mhndev_systems_mysql_data:
mhndev_systems_wp_uploads:
networks:
mhndev_network:
services:
## --------------------------------------------
## | 1: Wordpress
## --------------------------------------------
mhndev_systems_wp:
build:
context: .
dockerfile: docker/Dockerfile
args:
WP_VERSION: ${WP_VERSION}
MYSQL_HOST: ${MYSQL_HOST}
MYSQL_PORT: ${MYSQL_PORT}
MYSQL_DATABASE_NAME: ${MYSQL_DATABASE_NAME}
MYSQL_USERNAME: ${MYSQL_USERNAME}
MYSQL_PASSWORD: ${MYSQL_PASSWORD}
SITE_URL: ${SITE_URL}
DB_TABLE_PREFIX: ${DB_TABLE_PREFIX}
ENV: ${ENV}
UID: ${UID}
GID: ${GID}
SITE_TITLE: ${SITE_TITLE}
SITE_ADMIN_USERNAME: ${SITE_ADMIN_USERNAME}
SITE_ADMIN_PASSWORD: ${SITE_ADMIN_PASSWORD}
SITE_ADMIN_EMAIL: ${SITE_ADMIN_EMAIL}
network: "mhndev_network"
ports:
- 8191:80
env_file:
- .env
volumes:
- ./themes/dt-the7-child:/var/www/html/wp-content/themes/dt-the7-child
- ./plugins/teamcity:/var/www/html/wp-content/plugins/teamcity
- mhndev_systems_wp_uploads:/var/www/html/wp-content/uploads
depends_on:
- mhndev_systems_mysql
networks:
- mhndev_network
## --------------------------------------------
## | 2: Mysql
## --------------------------------------------
mhndev_systems_mysql:
image: mysql:5.7.21
environment:
MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD}
MYSQL_DATABASE: ${MYSQL_DATABASE_NAME}
MYSQL_USER: ${MYSQL_USERNAME}
MYSQL_PASSWORD: ${MYSQL_PASSWORD}
volumes:
- mhndev_systems_mysql_data:/var/lib/mysql
networks:
- mhndev_network
## --------------------------------------------
## | 3: PhpMyAdmin
## --------------------------------------------
mhndev_systems_phpmyadmin:
image: phpmyadmin/phpmyadmin:5.0.2
depends_on:
- mhndev_systems_mysql
ports:
- "7191:80"
environment:
PMA_HOST: mhndev_systems_mysql
networks:
- mhndev_network
这是我的 Dockerfile :
FROM php:7.4-apache
ARG WP_VERSION=5.5.1
RUN apt-get update && apt-get install -y \
sendmail \
libpng-dev \
libjpeg-dev \
libfreetype6-dev \
netcat \
gnupg \
libzip-dev \
zip \
&& docker-php-ext-configure gd --with-freetype --with-jpeg \
&& docker-php-ext-install gd pdo_mysql zip \
&& docker-php-ext-install mysqli && docker-php-ext-enable mysqli
ADD ./docker/apache.conf /etc/apache2/sites-enabled/000-default.conf
RUN \
printf "\nServerName localhost" >> /etc/apache2/apache2.conf &&\
a2enmod rewrite expires
### install wp cli
RUN curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar &&\
chmod +x wp-cli.phar &&\
mv wp-cli.phar /usr/local/bin/wp
WORKDIR /var/www/html
RUN wp core download --allow-root
### copy plugins and themes and php config files to container
COPY ["./plugins/*.zip", "/docker/plugins/"]
COPY ["./themes/*.zip", "/docker/themes/"]
COPY ./themes/dt-the7-child /var/www/html/wp-content/themes/dt-the7-child
COPY ./plugins/teamcity /var/www/html/wp-content/plugins/teamcity
COPY ./docker/php.ini /usr/local/etc/php/php.ini
COPY ./docker/wp-config.php /var/www/html/wp-config.php
COPY ["./plugins/plugins_*.txt", "/docker/plugins/"]
COPY ["./uploads/", "/docker/uploads/"]
COPY ["./docker/commands/*.sh", "/docker/bin/"]
RUN chmod a+x /docker/bin/*.sh
RUN /bin/bash -c "source /docker/bin/setup-theme-plugins.sh"
RUN chown -R www-data:www-data /var/www/html/
CMD apachectl -D FOREGROUND
这里有一个bash文件(setup-theme-plugins.sh)，负责安装wordpress核心和插件
#!/bin/bash
echo '-------------------whoami--------------------'
echo $(whoami)
echo '---------------------------------------------'
printf "3[0;32m > Waiting for mysql ...\x1b[0m \n"
until nc -z -v -w30 "$MYSQL_HOST" "$MYSQL_PORT"
do
echo "Waiting for database connection..."
# wait for 5 seconds before check again
sleep 1
done
printf "3[0;32m >Mysql is ready ...\x1b[0m \n"
echo '---------------------------------------------'
printf "3[0;32m > Copy wordpress uploads if not exists (usually first time ) \x1b[0m \n"
FILE=/var/www/html/wp-content/uploads/2020/01/dell.jpg
if [ -f "$FILE" ]; then
echo "$FILE exists, so no need to copy uploads"
else
echo "$FILE does not exist, copying ..."
cp -r /docker/uploads/* /var/www/html/wp-content/uploads
fi
echo '---------------------------------------------'
sed -i s/__DB_NAME__/"${MYSQL_DATABASE_NAME}"/g /var/www/html/wp-config.php
sed -i s/__DB_USER__/"${MYSQL_USERNAME}"/g /var/www/html/wp-config.php
sed -i s/__DB_PASSWORD__/"${MYSQL_PASSWORD}"/g /var/www/html/wp-config.php
sed -i s/__DB_HOST__/"${MYSQL_HOST}"/g /var/www/html/wp-config.php
sed -i s/__SITE_URL__/"${SITE_URL}"/g /var/www/html/wp-config.php
if [[ -n "${DB_TABLE_PREFIX}" ]]; then
sed -i s/__DB_TABLE_PREFIX__/"${DB_TABLE_PREFIX}"/g /var/www/html/wp-config.php
else
sed -i s/__DB_TABLE_PREFIX__/"${DB_TABLE_PREFIX}"/g /var/www/html/wp-config.php
fi
### set WP_DEBUG, SCRIPT_DEBUG based on DEV environment variable
if [ "${ENV}" = "dev" ]; then
sed -i s/__WP_DEBUG__/true/g /var/www/html/wp-config.php
sed -i s/__SCRIPT_DEBUG__/true/g /var/www/html/wp-config.php
else
sed -i s/__WP_DEBUG__/false/g /var/www/html/wp-config.php
sed -i s/__SCRIPT_DEBUG__/false/g /var/www/html/wp-config.php
fi
wp option update home "${SITE_URL}" --allow-root
wp option update siteurl "${SITE_URL}" --allow-root
### set WP_DEBUG_LOG to php://stdout to always output logs to stdout so be available for docker logs
old_string='__WP_DEBUG_LOG__'
new_string='php://stdout'
sed -i "s%$old_string%$new_string%g" /var/www/html/wp-config.php
if [[ -n "${SITE_ADMIN_USERNAME}" ]]; then
DASHBOARD_USER_NAME="${SITE_ADMIN_USERNAME}"
else
DASHBOARD_USER_NAME="admin"
fi
if [[ -n "${UID}" ]]; then
usermod -u "${UID}" www-data
groupmod -g "${GID}" www-data
fi
chown -R www-data:www-data /var/www/html/
### install wordpress
printf "3[0;32m > Checking if wordpress core installed, if not Installing it ...\x1b[0m \n"
wp core is-installed --allow-root
retVal=$?
if [ "$retVal" == "1" ];then
printf "3[0;32m > Trying to Install wordpress ...\x1b[0m \n"
printf "3[0;32m > Command to execute is : wp core install --url="${SITE_URL}" --title="${SITE_TITLE}" --admin_user="${DASHBOARD_USER_NAME}" --admin_password="${SITE_ADMIN_PASSWORD}" --admin_email="${SITE_ADMIN_EMAIL}" --allow-root ...\x1b[0m \n"
wp core install --url="${SITE_URL}" --title="${SITE_TITLE}" --admin_user="${DASHBOARD_USER_NAME}" --admin_password="${SITE_ADMIN_PASSWORD}" --admin_email="${SITE_ADMIN_EMAIL}" --allow-root
fi
echo '---------------------------------------------'
### install The7 theme from zip file
# shellcheck disable=SC2059
printf "3[0;32m > Checking if theme: $FILE installed, if not Installing it ...\x1b[0m \n"
wp theme is-installed The7 --allow-root
is_theme_installed=$?
if [[ is_theme_installed -eq 1 || ! -d /var/www/html/wp-content/themes/dt-the7 ]]; then
rm -rf /var/www/html/wp-content/themes/dt-the7
wp theme install /docker/themes/dt-the7.zip --force --allow-root;
fi
echo '---------------------------------------------'
### install plugins from plugins_dev.txt or plugins_prod.txt based on environment
# shellcheck disable=SC2162
while read line; do
IFS='=' read -r -a array <<< "$line"
printf "3[0;32m > Checking if plugin:%s is installed else Installing %s:%s ...\x1b[0m \n" "${array[0]}" "${array[0]}" "${array[1]}"
# if wp plugin is-installed "${array[0]}" --allow-root; then
wp plugin install "${array[0]}" --version="${array[1]}" --activate --force --allow-root
# fi
echo '---------------------------------------------'
done < /docker/plugins/plugins_"${ENV}".txt
### install plugins from zip file
for FILE in /docker/plugins/*.zip;
do
# shellcheck disable=SC2059
printf "3[0;32m > Installing plugin $FILE ...\x1b[0m \n"
wp plugin install "$FILE" --force --allow-root;
echo '---------------------------------------------'
done
printf "3[0;32m > Checking if hello plugin exist and if so uninstall it ...\x1b[0m \n"
#if ! wp plugin is-installed hello --allow-root; then
wp plugin uninstall hello --allow-root
#fi
echo '---------------------------------------------'
printf "3[0;32m > Checking if akismet plugin exist and if so uninstall it ...\x1b[0m \n"
#if ! wp plugin is-installed akismet --allow-root; then
wp plugin uninstall akismet --allow-root
#fi
echo '---------------------------------------------'
printf "3[0;32m > activating the7 child theme ...\x1b[0m \n"
wp theme activate dt-the7-child --allow-root
echo '---------------------------------------------'
printf "3[0;32m > Uninstalling initial themes ...\x1b[0m \n"
#if ! wp theme is-installed twentynineteen --allow-root; then
wp theme delete twentynineteen --allow-root
#fi
echo '---------------------------------------------'
#if ! wp theme is-installed twentyseventeen --allow-root; then
wp theme delete twentyseventeen --allow-root
#fi
echo '---------------------------------------------'
#if ! wp theme is-installed twentytwenty --allow-root; then
wp theme delete twentytwenty --allow-root
#fi
echo '---------------------------------------------'
正如您在我的 bash 文件中看到的那样，我正在连接到 mysql 容器。 我怎样才能做到这一点？
我的猜测是您无法连接，因为数据库服务已启动但尚未就绪。在 the docker documentation on depends_on 中说明了这一点（我也遇到过这个问题）：
depends_on does not wait for db and redis to be “ready” before starting web - only until they have been started. If you need to wait for a service to be ready, see Controlling startup order for more on this problem and strategies for solving it.
（强调我的）
在我的例子中，我以一种非常丑陋的方式解决了它（在我的 python 脚本中有一个 sleep() 10 秒），但如果这对你来说没有解决方案，也许官方策略文档 found here 可能会有帮助。
[编辑] 你用什么作为主机变量名？在 docker compose 中使用网络时，机器应该能够使用它们的容器名称相互通信（即 mhndev_systems_mysql 在您的情况下）。你能试试吗？
您根本无法从 Docker 文件连接到数据库。
其中一部分是图像工作原理的基本 Docker 模型。 Docker 镜像仅包含一个文件系统和一些描述如何从中启动容器的元数据；您可以将其复制到不同的系统并在那里 运行。如果您构建了一个图像并尝试更新数据库作为它的一部分，然后 运行 在不同的系统上使用相同的图像，它不会有数据库设置；同样，你可以删除并重新创建本地数据库而不用重建图像，你不会有任何数据库内容。
从机制上讲，docker build 步骤（或其等效的 Compose）运行 在受限环境中。最值得注意的是，它没有连接到任何 Compose 网络，因此没有网络设置来解析像 mhndev_systems_mysql 这样的主机名。 （从技术上讲，它位于 default bridge network 上，与 Compose default 网络或您为构建容器指定的任何 networks: 不同。）
在典型的应用程序中，您希望将“应用程序代码”与“数据库设置”分开。当应用程序启动时，您必须 运行 database-setup 部分（通常是“迁移”），或者与启动应用程序分开；但你不能在构建时这样做。
构建时间和运行时间之间存在一个简单的误解；所有容器将在 运行 时间内可用，而不是构建时间。因此，在构建时无法访问您的 MySQL 容器。 我的建议是从你的 Dockerfile 中删除所有需要 MySQL 的步骤并将它们移动到你的入口点，然后在你的 Dockerfile 中设置一个布尔值 ENV 并在你的入口点开始时检查该值 运行 您的命令，如果您将该 ENV 设置为 true；现在，如果您需要 运行 您的入口点（也就是设置您的 WP & MySQL），只需在构建时传递该 ENV。
docker build --build-arg var_name=${VARIABLE_NAME}