Jenkins 构建镜像时，报错：The Process class relies on proc_open, which is not available on your PHP installation.的解决

1、由于无法从 dist 下载 yiisoft/yii2-composer (2.0.7)，现在尝试从源代码下载，Process 类依赖于 proc_open ，这在PHP安装中不可用，如图1

2、编辑 Dockerfile，在 disable_functions 中删除 proc_open、proc_close

FROM registry-vpc.cn-beijing.aliyuncs.com/cmc/centos-nginx112-php71:0.2.4

MAINTAINER wjtester@sobey.com

RUN sed -i 's/open_basedir = .\/:\/sobey:\/tmp:\/data:\/webtv/;open_basedir = .\/:\/sobey:\/tmp:\/data:\/webtv:\/usr\/local\/php/g' /usr/local/php/etc/php.ini && \
    sed -i 's/allow_url_fopen = Off/allow_url_fopen = On/g' /usr/local/php/etc/php.ini && \
    sed -i 's/disable_functions = exec,system,passthru,shell_exec,escapeshellarg,escapeshellcmd,proc_close,proc_open,dl,popen,show/disable_functions = system,passthru,shell_exec,escapeshellarg,escapeshellcmd,dl,popen,show/g' /usr/local/php/etc/php.ini

COPY code /sobey/www/pcs-api
COPY code/build/c_files/ /

RUN chown -R nginx:nginx /sobey/www/ && \
    rm -rf /etc/nginx/conf.d/status.conf && \
    chmod +x /usr/local/bin/composer && \
    cd /sobey/www/pcs-api && \
    composer install

3、之前 proc_open、proc_close 也是禁用的，可以正常构建，原因在于可以从 dist 正常下载 yiisoft/yii2-composer (2.0.6)，因此，不会从源代码下载，也就不会使用到 proc_open、proc_close，如图2

4、重新构建镜像，从源代码下载成功，构建成功，如图3