Let's Encrypt全自动化配置https的shell脚本

脚本可能有点缺陷，如有不足之处请指正，比如如果系统已经通过其它渠道安装过nginx并且没有配置命令这时候可能会出错

最好的条件就是干净的系统下直接运行该脚本哦

#!/bin/bash
#author yaozhongjie

echo "=======================Let's Encrypt环境准备======================================="
if command -v python > /dev/null 2>&1; then
    echo 'python 环境就绪...'
    python_command=python
else
    echo 'python环境不存在，即将开始自动安装。。'
    apt-get -y install python || yum -y install python
    echo 'python 安装成功'
    python_command=python

fi
if command -v openssl > /dev/null 2>&1; then
    echo 'openssl 环境就绪...'
else
    echo 'openssl 不存在，准备安装。。。'
    apt-get -y install openssl || yum -y install openssl
fi

if command -v nginx> /dev/null 2>&1; then
        echo 'nginx 环境就绪...'
else
    echo "nginx 环境不存在，是否需要自动安装？"
    echo -e '\n'
cat << EOF
是否需要安装(y/n)?
EOF
read -p "> " confirm
    if [[ $confirm == "y" ]]; then
        apt-get -y install nginx || yum -y install nginx
        echo 'nginx 环境安装成功'
    else
        exit 0
    fi
fi

echo "==========================环境准备完成==========================="
echo "开始配置"
echo "1、域名配置，请确保你的域名已解析到本机"
echo "请输入域名（多个请用空格隔开）：按回车结束（例：www.baidu.com）"
read -p "> " web_domains
domain_length=0
sign_domain_str=''
web_first_domain=$(echo $web_domains|tr -s [:blank:]|cut -d ' ' -f 1)
nginx_web_config_file=$web_first_domain".conf"
for web_domain in ${web_domains[@]}
do
    sign_domain_str=$sign_domain_str"DNS:"$web_domain","
    domain_length=$(($domain_length+1))
done
sign_domain_str=${sign_domain_str:0:${#sign_domain_str}-1}
echo "$sign_domain_str"

echo "2、站点绝对路径配置，如果未输入或者输入非绝对路径，就默认使用域名为目录配置到/tmp目录下"
mkdir /certs
read -p "> " web_dir
if [[ -z "$web_dir" || ! "$web_dir" == /* ]]; then
	web_dir="/certs/"$web_first_domain
fi

echo "3、nginx路径配置，如果你的默认路径是/etc/nginx，请直接回车"
read -p "> " nginx_config_dir
if [[ -z "$nginx_config_dir" ]]; then
    nginx_config_dir=/etc/nginx
fi


echo -e "\n"
cat << EOF
确认配置

网站根目录: $web_dir
域名: $web_domains
nginx配置文件路径: $nginx_config_dir

请输入1或2
1):确认
2):退出
EOF
read -p "> " confirm
if [[  $confirm -eq 2 ]]; then
    exit 0
fi
echo "===========================自动化配置开始================================="
mkdir -p ${web_dir}"/certificate/challenges"
chmod -R 755 ${web_dir}"/certificate"
web_first_parent_dir="/"$(echo $web_dir|cut -d "/" -f2)
find $web_first_parent_dir -type d -exec chmod o+x {} \;
cd $web_dir"/certificate"
echo "Create a Let's Encrypt account private key"
openssl genrsa 4096 > account.key
echo "generate a domain private key"
openssl genrsa 4096 > domain.key
if [[ $domain_length -gt 1 ]]; then
    openssl req -new -sha256 -key domain.key -subj "/" -reqexts SAN -config <(cat /etc/ssl/openssl.cnf <(printf "[SAN]\nsubjectAltName=$sign_domain_str")) > domain.csr || openssl req -new -sha256 -key domain.key -subj "/" -reqexts SAN -config <(cat /etc/pki/tls/openssl.cnf <(printf "[SAN]\nsubjectAltName=$sign_domain_str")) > domain.csr
else
    openssl req -new -sha256 -key domain.key -subj "/CN=$web_domains" > domain.csr
fi
cat > $nginx_config_dir"/conf.d/"$nginx_web_config_file < ./signed.crt || exiterr "create the http website failed,please view the issue of github doc"
#NOTE: For nginx, you need to append the Let's Encrypt intermediate cert to your cert
wget --no-check-certificate  https://letsencrypt.org/certs/lets-encrypt-x3-cross-signed.pem -O intermediate.pem
cat signed.crt intermediate.pem > chained.pem
cat > $nginx_config_dir"/conf.d/"$nginx_web_config_file < $web_dir/index.html << EOF
generate https website succssfully

this is the index.html of $web_first_domain 

yout can visit this page from $web_domains
EOF
fi
# current_user=$USER
# current_user=$(id -un) not work for sudo
current_user=$(who am i|awk '{print $1}')
current_user_group=$(id -gn $current_user)
chown -R $current_user:$current_user_group $web_dir
chown $current_user:$current_user_group $nginx_config_dir"/conf.d/"$nginx_web_config_file
chmod -R 755 $web_dir
service nginx restart
echo -e "\n\n"
cat << EOF
generate https website succssfully
your website directory is $web_dir
your nginx config file is $nginx_config_dir/conf.d/$nginx_web_config_file
you can visit your website through these domains
EOF
for web_domain in ${web_domains[@]}
do
    echo https://$web_domain
done
cat > $web_dir/certificate/renew_cert.bash < /tmp/signed.crt || exit
wget --no-check-certificate -O - https://letsencrypt.org/certs/lets-encrypt-x3-cross-signed.pem > intermediate.pem
cat /tmp/signed.crt intermediate.pem > $web_dir/certificate/chained.pem
service nginx reload
EOF

echo "Let's Encrypt 证书有效期定时任务配置"
if command -v crontab > /dev/null 2>&1; then
    echo 'crontab 已安装'
else
    echo 'crontab 未安装，将为您自动安装...'
    apt-get -y install cron || yum -y install cron
fi
echo "1 1 1 * * root bash $web_dir/certificate/renew_cert.bash >> /var/log/renew_cert_error.log 2 >> /var/log/renew_cert.log" >> /etc/crontab
echo "证书续期定时器添加成功"
read -p 'press any key to quit'
exit 0