sidでruby 2.3系、2.2系、2.1系をlibssl1.0-devを使ってビルドする

Dockerfile

FROM debian:sid

ARG ruby_version=2.3.4

RUN apt-get update
RUN apt-get install -y --no-install-recommends \
    build-essential autoconf bison ca-certificates git-core libgdbm-dev libncursesw5-dev libncurses5-dev libreadline-dev zlib1g-dev libssl1.0-dev libffi-dev libyaml-dev libgmp-dev \
    rbenv ruby-build

RUN if [ ! -f /usr/share/ruby-build/${ruby_version} ]; then \
      curl -sSL -o /usr/share/ruby-build/${ruby_version} https://raw.githubusercontent.com/rbenv/ruby-build/master/share/ruby-build/${ruby_version}; \
    fi

RUN rbenv install ${ruby_version}
RUN rbenv global ${ruby_version}

## check ruby version, openssl version
RUN rbenv exec ruby --version
RUN rbenv exec gem env
RUN rbenv exec ruby -ropenssl -ve 'puts OpenSSL::OPENSSL_VERSION'