Alpine 3.17 Docker环境安装Xdebug失败，求解决方法

我在Alpine 3.17环境下尝试安装Xdebug，试过多种谷歌找到的方案都无效，目前卡住了。

我尝试用PECL安装Xdebug，执行pecl install xdebug时收到如下错误：

#7 ERROR: process "/bin/sh -c pecl install xdebug" did not complete successfully: exit code: 127
------
 > [ 3/34] RUN pecl install xdebug:
#7 0.416 /bin/sh: pecl: not found
------
Dockerfile:30
--------------------
  28 |         composer
  29 |     
  30 | >>> RUN pecl install xdebug
  31 |     RUN docker-php-ext-enable xdebug
  32 |     
--------------------
ERROR: failed to solve: process "/bin/sh -c pecl install xdebug" did not complete successfully: exit code: 127

我的Dockerfile内容如下：

FROM alpine:3.17

RUN set -x \
    && apk add --no-cache \
    tzdata \
    bash \
    vim \
    supervisor \
    nginx \
    nginx-mod-http-headers-more \
    gcc \
    musl-dev \
    php81 \
    php81-phar \
    php81-fpm \
    php81-curl \
    php81-redis \
    php81-opcache \
    php81-mysqlnd \
    php81-pdo_mysql \
    php81-tokenizer \
    php81-dom \
    php81-fileinfo \
    php81-xml \
    php81-xmlwriter \
    php81-xmlreader \
    composer

RUN pecl install xdebug
RUN docker-php-ext-enable xdebug

RUN ln -s /usr/share/zoneinfo/Europe/Berlin /etc/localtime

RUN mkdir /etc/supervisor.d
RUN mkdir /etc/nginx/snippets
RUN mkdir /etc/nginx/conf.d
RUN mkdir /run/php
RUN mkdir /srv/ylvi

COPY docker/supervisord.conf /etc/supervisord.conf
COPY docker/supervisor-php-fpm81.ini /etc/supervisor.d/php-fpm81.ini
COPY docker/supervisor-nginx.ini /etc/supervisor.d/nginx.ini
COPY docker/supervisor-cron.ini /etc/supervisor.d/cron.ini
COPY docker/nginx.conf /etc/nginx/nginx.conf
COPY docker/nginx-mo.conf /etc/nginx/snippets/mo.conf
COPY docker/nginx-fastcgi-php.conf /etc/nginx/snippets/fastcgi-php.conf
COPY docker/nginx-php8.1-fpm.conf /etc/nginx/snippets/php8.1-fpm.conf
COPY docker/nginx-chk.conf /etc/nginx/http.d/nginx-chk.conf
COPY docker/nginx-ylvi.conf /etc/nginx/http.d/ylvi.conf
RUN rm -f /etc/nginx/http.d/default.conf
COPY docker/health_check.php /var/www/localhost/htdocs/health_check.php
COPY docker/php-mo.ini /etc/php81/conf.d/99_mo.ini
COPY docker/php-fpm.conf /etc/php81/php-fpm.conf
COPY docker/php-www.conf /etc/php81/php-fpm.d/www.conf

WORKDIR /srv/www
RUN /bin/touch storage/logs/laravel.log
RUN /bin/chown nginx:nginx -R /srv/ylvi

# Add the cron job
RUN crontab -l | { cat; cat docker/crontab.conf; } | crontab -

EXPOSE 10080

CMD ["/usr/bin/supervisord", "-c", "/etc/supervisord.conf"]

我已经尝试过以下方法，但都没解决问题：

• 添加$PHPIZE_DEPS依赖
• 尝试用php8.1-pecl-xdebug直接替代PECL安装方式
• 添加musl-dev和gcc编译依赖

我看到不少人在Alpine环境用PECL遇到问题，但情况和我不太一样。请问有没有解决这个问题的建议？

内容的提问来源于stack exchange，提问作者MIB