无法打开共享 object 文件：启动 Rails 时没有这样的文件或目录 - /usr/local/bundle/gems/mysql2-0.5.3/lib/mysql2/mysql2.so (LoadError)

Question

I'm trying to build and launch a Rails 6 container using mysql2 gem. Everything builds fine but when I go to launch the Rails server, I get the error

/usr/local/bundle/gems/activesupport-6.0.3.6/lib/active_support/dependencies.rb:324:in `require': libmariadb.so.3: cannot open shared object file: No such file or directory - /usr/local/bundle/gems/mysql2-0.5.3/lib/mysql2/mysql2.so (LoadError)

The relevant part of my Dockerfile is where I'd install the native extensions. I'm aware that MariaDB is also an option but I tried those too and got the same error.

apt-get update -qq && apt-get install -y git openssh-client build-essential pkg-config default-mysql-client default-libmysqlclient-dev libsqlite3-dev ;\

I'm using mysql2 (0.5.3) and Rails 6.0.3.6

Anyone have any suggestions? I've probably spent a week on this, your help would be greatly appreciated. Thanks!

Answer 1

I figured out the issue.

In my Dockerfile I had another FROM clause after my apt-get install. Doing that reset the scope of the file so those dependencies weren't available at runtime of the Rails server. I removed that and it worked.