参考文献

エラー① "cannot open shared object file"

LoadError: libmariadb.so.3: cannot open shared object file: No such file or directory

$export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib64

$ cat /etc/ld.so.conf

$ echo "/usr/lib64/XXXXX/lib" >/etc/ld.so.conf

$ bundle exec gem uninstall mysql2

$ bundle install

ERROR 1045 (28000): Access denied for userとなったときの対応方法

grant all privileges on 'DB名'.* to 'ユーザ名'@'ホスト名' identified by 'password' with grant option;

mysql -u 'RDSユーザ名' -p -h XXXXXXXXXX.ap-northeast-1.rds.amazonaws.com