我的 Docker 容器从 Git 中提取我的 Node 应用程序并安装所需的依赖项。但是,在初始运行后对 Docker Start 的后续调用会重新运行此逻辑。有没有办法可以将我的入口点脚本设置为仅在调用 Docker 运行时从 Git 中提取应用程序?我假设我总是可以在初始设置完成后将文件写入容器并在从 Git 中提取之前检查该文件?有没有更好更干净的方法来实现这种行为?
Dockerfile:
# Generic Docker Image for Running Node app from Git Repository
FROM node:0.10.33-slim
ENV NODE_ENV production
# Add script to pull Node app from Git and run the app
COPY docker-node-entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh
ENTRYPOINT ["/entrypoint.sh"]
EXPOSE 8080
CMD ["--help"]
入口点脚本:
#!/bin/bash
set -e
# Run the command passed in if it isn't to start a node app
if [ "$1" != 'node-server' ]; then
exec "$@"
fi
# Logic for pulling the node app and starting it
cd /usr/src
# try to remove the repo if it already exists
rm -rf node-app; true
echo "Pulling Node app's source from $2"
git clone $2 node-app
cd node-app
# Check if we should be running a specific commit from the git repo
if [ ! -z "$3" ]; then
echo "Changing to commit $3"
git checkout $3
fi
npm install
echo "Starting the app"
exec node .