opensslでコマンド一発で自己証明書を作る

opensslでコマンド一発で秘密鍵と自己証明書を作成する例です。

openssl req -new -newkey rsa:2048 -sha1 -x509 -nodes \
    -set_serial 1 \
    -days 365 \
    -subj "/C=JP/ST=Osaka/L=Osaka City/CN=example.com" \
    -out /etc/pki/tls/certs/example.com.crt \
    -keyout /etc/pki/tls/private/example.com.key

Ansibleのplaybookの例
https://github.com/hnakamur/ansible-playbooks/blob/c4f05a64cddd4275a437c68ae2439e429d56a9d6/roles/common/tasks/self_signed_certificate.yml

chefのrecipeの例
https://github.com/hnakamur/chef-cookbooks/blob/e27426d394ea63732d56ac617d88d4815d660d7b/self_signed_certificate/recipes/default.rb