docker 中安装 PHP 的 event 扩展，提示 PHP_sockets_le_socket: symbol not found

FROM php:7.1.30-cli-alpine3.9

# Packages
RUN apk --update add \
    autoconf \
    build-base \
    linux-headers \
    libaio-dev \
    zlib-dev \
    curl \
    git \
    subversion \
    freetype-dev \
    libjpeg-turbo-dev \
    libmcrypt-dev \
    libpng-dev \
    libtool \
    libbz2 \
    bzip2 \
    bzip2-dev \
    libstdc++ \
    libxslt-dev \
    libevent-dev \
    openldap-dev \
    imagemagick-dev \
    make \
    unzip \
    wget && \
    docker-php-ext-install bcmath zip bz2 pdo_mysql mysqli simplexml opcache sockets mbstring pcntl xsl && \
    docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ && \
    pecl install imagick && \
    docker-php-ext-enable imagick && \
    pecl install redis && \
    docker-php-ext-enable redis && \
    pecl install mongodb && \
    docker-php-ext-enable mongodb && \
    docker-php-ext-enable sockets && \
    pecl install event && \
    docker-php-ext-enable event && \
    pecl install swoole-4.2.11 && \
    docker-php-ext-enable swoole && \
    docker-php-ext-install gd && \
    docker-php-ext-enable opcache \
    && rm -rf /var/cache/apk/*

ENV COMPOSER_ALLOW_SUPERUSER 1
ENV COMPOSER_HOME /tmp
ENV COMPOSER_VERSION 1.5.1

RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/bin --filename=composer \
 && composer --ansi --version --no-interaction

VOLUME /var/www
WORKDIR /var/www

CMD [ "php", "./public/server.php" ]

错误的意思是sockets扩展没找到，但是我已经装了sockets扩展。
这是可以拉取测试的镜像： salamandermh/php-cli:7.1

docker

pigLoveRabbit

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pigLoveRabbit

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解决了,是扩展加载顺序问题

because event was being loaded before sockets from the .ini's in /usr/local/etc/php/conf.d

Going into your image, the ordering of these files determines which are loaded first

/usr/local/etc/php/conf.d # ls -al
total 28
drwxr-xr-x    2 root     root          4096 Jul  9 20:39 .
drwxr-xr-x    7 root     root          4096 Jul  9 20:01 ..
-rw-r--r--    1 root     root            19 Jul  9 18:39 docker-php-ext-event.ini
-rw-r--r--    1 root     root            82 Jul  9 18:39 docker-php-ext-opcache.ini
-rw-r--r--    1 root     root            23 Jul  9 18:38 docker-php-ext-pdo_mysql.ini
-rw-r--r--    1 root     root            21 Jul  9 18:38 docker-php-ext-sockets.ini
-rw-r--r--    1 root     root            20 Jun 28 02:48 docker-php-ext-sodium.ini

docker-php-ext-enable allows for a flag to change the .ini name, so doing a docker-php-ext-enable --ini-name zz-event.ini event has it load in last.

正确的Dockerfile

FROM php:7.1.30-cli-alpine3.9

# Packages
RUN apk add --no-cache \
    autoconf \
    build-base \
    linux-headers \
    libevent-dev \
    openldap-dev \
    imagemagick-dev

RUN docker-php-ext-install sockets pdo_mysql opcache

RUN docker-php-ext-enable opcache && \
    pecl install event-2.5.3 && \
    docker-php-ext-enable --ini-name zz-event.ini event

ENV COMPOSER_ALLOW_SUPERUSER 1
ENV COMPOSER_HOME /tmp
ENV COMPOSER_VERSION 1.5.1

RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/bin --filename=composer \
 && composer --ansi --version --no-interaction

VOLUME /var/www
WORKDIR /var/www

CMD [ "php", "./public/server.php" ]

github issue

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