Question

我正在尝试构建一个docker容器来将MySql数据库迁移到Postgresql。计划是使用docker-compose.yml中的每个服务器的广告图像，但我的初始图像构建失败

我的dockerfile：

FROM ruby:2.4.0

RUN apt-get update && apt-get install -y \ 
  build-essential \ 
  nodejs \
  mysql-client \ 
  libmysqlclient-dev \
  libpq-dev \


RUN mkdir -p /app 
WORKDIR /app

RUN gem install mysql2psql

但是我收到了一个错误：

Building native extensions.  This could take a while...
ERROR:  Error installing mysql2psql:
        ERROR: Failed to build gem native extension.

    current directory: /usr/local/bundle/gems/mysql-2.8.1/ext/mysql_api
/usr/local/bin/ruby -r ./siteconf20180130-1553-1id0936.rb extconf.rb
checking for mysql_ssl_set()... yes
checking for rb_str_set_len()... yes
checking for rb_thread_start_timer()... no
checking for mysql.h... yes
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
        --with-opt-dir
        --without-opt-dir
        --with-opt-include
        --without-opt-include=${opt-dir}/include
        --with-opt-lib
        --without-opt-lib=${opt-dir}/lib
        --with-make-prog
        --without-make-prog
        --srcdir=.
        --curdir
        --ruby=/usr/local/bin/$(RUBY_BASE_NAME)
        --with-mysql-config
        --without-mysql-config
extconf.rb:67:in `<main>': uninitialized constant Config (NameError)
Did you mean?  RbConfig
               CONFIG

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /usr/local/bundle/extensions/x86_64-linux/2.4.0/mysql-2.8.1/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /usr/local/bundle/gems/mysql-2.8.1 for inspection.
Results logged to /usr/local/bundle/extensions/x86_64-linux/2.4.0/mysql-2.8.1/gem_make.out

我错过了什么？

Answer 1

首先，您的Dockerfile中有错误：您不应将\放在RUN命令的末尾。

你安装这个宝石的问题与它太旧有关。这个gem需要gem mysql -v '2.8.1'，它只与Ruby 2.1或更早版本兼容。

因此，要使其正常工作，您可以使用FROM ruby:2.1或使用其他gem来更改您的ruby版本，例如：https://github.com/maxlapshin/mysql2postgres。

工作解决方案：

FROM ruby:2.1

RUN apt-get update && apt-get install -y \
  build-essential \
  nodejs \
  mysql-client \
  libmysqlclient-dev \
  libpq-dev

RUN mkdir -p /app
WORKDIR /app

RUN gem install mysql2psql

安装mysql2psql时出错：错误：无法构建gem原生扩展

1 个答案: