配置渲染工具

dockerfile

FROM python:3.11.3-alpine3.17

COPY requirements.txt .

RUN pip install --no-cache-dir -r requirements.txt -i https://mirrors.cloud.tencent.com/pypi/simple && \
    rm -f requirements.txt

requirements.txt

Jinja2==3.1.2
MarkupSafe==2.1.2
PyYAML==6.0
jinja2-base64-filters==0.1.4

镜像构建

docker build -t config-render:v1.0 .
docker save config-render:v1.0 -o config-render_v1.0.tar

render.py

#!/usr/bin/env python3

import os
from yaml import safe_load
from jinja2 import Environment, FileSystemLoader, Template
from jinja2_base64_filters import jinja2_base64_filters

def get_vars_from_file(config_file):
    with open(config_file, 'r') as f:
        vars_string = f.read()
    base_vars = safe_load(vars_string)
    context = Template(vars_string).render(base_vars)
    # print(context)
    return context

def render_template(input_path, output_path, context=None):
    """
    渲染一个输入路径的文件或文件夹，并将渲染后的结果输出到指定输出路径
    :param env: Jinja2的环境对象
    :param input_path: 需要渲染的文件或文件夹路径
    :param output_path: 渲染结果保存的输出路径
    :param context: 传递给Jinja2模板的上下文数据
    """
    # 如果输入路径是文件夹，则处理所有子文件和子目录
    if os.path.isdir(input_path):
        for dirpath, dirnames, filenames in os.walk(input_path):
            # 创建相同的子目录结构
            rel_dir = os.path.relpath(dirpath, input_path)
            new_dir = os.path.join(output_path, rel_dir)
            os.makedirs(new_dir, exist_ok=True)

            # 处理所有的子文件
            for filename in filenames:
                input_file = os.path.join(dirpath, filename)
                output_file = os.path.join(new_dir, filename)
                render_template(input_file, output_file, context=context)
    # 如果输入路径是一个文件，则对该文件进行渲染
    else:
        print("{} > {}".format(input_path, output_path))
        env = Environment(extensions=["jinja2_base64_filters.Base64Filters"], loader=FileSystemLoader(os.path.dirname(input_path)))
        template = env.get_template(os.path.basename(input_path))
        rendered = template.render(context or {})
        with open(output_path, "w", encoding="utf-8") as fp:
            fp.write(rendered)


if __name__ == "__main__":
    input_dir = "templates"
    output_dir = "deploy"
    config_file = "config.yaml"
    # 渲染并加载配置文件
    context = safe_load(get_vars_from_file(config_file))
    # print(context)
    render_template(input_dir, output_dir, context)
    print("渲染完成!")

render.sh

#!/bin/bash

base_path=$(
    cd "$(dirname "$0")" || exit 1
    pwd
)

echo "开始渲染配置文件，请稍等..."

docker images | grep config-render > /dev/null 2>&1 || docker load -i ${base_path}/config-render_v1.0.tar

docker run -i --rm \
    --name render \
    --volume ${base_path}:/opt \
    -w /opt \
    harbor.stacs.cn/devops/config-render:v1.0 \
    python render.py