在 Docker 容器中加载共享库 libsqlite3.so.0 时出错

Question

当我尝试从Alpine Ruby 2.6.3的Docker容器中构建Rails应用程序时，我得到了以下堆栈跟踪。

我尝试安装sqlite、sqlite-dev和sqlite-libs，因为"libsqlite3"没有apk包。

我这样做的方式是错误的吗？

LoadError: Error loading shared library libsqlite3.so.0: No such file or directory (needed by /usr/local/bundle/gems/sqlite3-1.3.13/lib/sqlite3/sqlite3_native.so) - /usr/local/bundle/gems/sqlite3-1.3.13/lib/sqlite3/sqlite3_native.so
/usr/local/bundle/gems/activesupport-5.0.7/lib/active_support/dependencies.rb:293:in `require'
/usr/local/bundle/gems/activesupport-5.0.7/lib/active_support/dependencies.rb:293:in `block in require'
/usr/local/bundle/gems/activesupport-5.0.7/lib/active_support/dependencies.rb:259:in `load_dependency'
/usr/local/bundle/gems/activesupport-5.0.7/lib/active_support/dependencies.rb:293:in `require'
/usr/local/bundle/gems/sqlite3-1.3.13/lib/sqlite3.rb:6:in `rescue in <top (required)>'
/usr/local/bundle/gems/sqlite3-1.3.13/lib/sqlite3.rb:2:in `<top (required)>'
/app/config/application.rb:7:in `<top (required)>'

这是我的 Dockerfile：

FROM ruby:2.6.4-alpine3.9
WORKDIR /app
ENV RAILS_ENV=production
ENV RAILS_SERVE_STATIC_FILES=true
EXPOSE 3000

####
# Setup ruby environment
####
COPY ./admin/Gemfile* ./admin/*.gemspec ./admin/
COPY ./admin/lib/admin/version.rb ./admin/lib/admin/
RUN apk add --no-cache --virtual=.build-deps 
git openssh-client build-base mariadb-dev sqlite-libs sqlite-dev sqlite 
#Installing bundler without versioning could break things.
&& gem install bundler --pre 
&& bundle install --without=development,test 
&& bundle config 
&& apk del .build-deps
COPY . ./
RUN bundle config && bundle 
&& rm -f config/database.yml 
&& DATABASE_URL=sqlite3:/tmp/assets_dummy.sqlite3 bundle exec rake assets:precompile
COPY entrypoint /usr/local/bin/entrypoint

Answer 1

动态库或共享对象(以.so结尾的文件(需要存在于系统上才能运行程序。 您的长RUN命令正在安装sqlite-libs并在bundle install阶段使用它，但随后再次删除它;sqliteGem 仍需要安装动态库。

我会在单独的RUN命令中安装它。 由于开发包可能依赖于运行时库，因此我会先安装它以减少流失和下载时间(略微(。

RUN apk add --no-cache sqlite-libs
RUN apk add --no-cache --virtual=.build-deps 
git openssh-client build-base mariadb-dev sqlite-dev 
... 
&& apk del .build-deps