How Buildpacks Work
https://docs.cloudfoundry.org/buildpacks/understand-buildpacks.html
https://github.com/alibaba/derrick
简介
Derrick 是一个可以帮助开发者快速完成应用容器化的工具。Derrick 主要关注的是希望容器化的开发者如何在本地进行开发的问题。开发者可以通过使用 Derrick 加速本地应用容器化迁移的过程
Derrick 自动生成以下配置
- Dockerfile
- .dockerignore
- docker-compose.yml
- Jenkinsfile
- kubernetes-deployment.yaml
安装 derrick
yum install python2-pip python-devel
mkdir ~/.pip -p
vim ~/.pip/pip.conf
[global]
index-url = https://mirrors.aliyun.com/pypi/simple/
[install]
trusted-host=mirrors.aliyun.com
pip install --upgrade pip
pip install python-derrick
下载 derrick-nodejs-demo node 项目
git clone https://github.com/ringtail/derrick-nodejs-demo
选择需要部署的平台，支持 Kubernetes 和 Swarm
derrick config
? Which Orchestration Engine would you like to choose? Kubernetes
查看
cat /root/.derrick/derrick_conf
{
"engine": "Kubernetes"}
运行 Derrick
cd derrick-nodejs-demo
derrick init
? Please input image name with tag (such as "registry.com/user/repo:tag"): harbor.od.com/public/derrick-nodejs-demo:v1
Derrick detect your platform is NodeJs and compile successfully.
查看生成的配置
git status
# 位于分支 master
# 未跟踪的文件:
# （使用 "git add <file>..." 以包含要提交的内容）
#
# .dockerignore
# Dockerfile
# Jenkinsfile
# derrick_conf
# docker-compose.yml
# kubernetes-deployment.yaml
提交为空，但是存在尚未跟踪的文件（使用 "git add" 建立跟踪）
本地验证容器化结果
derrick up
Kubernetes is the default Orchestration Engine.
Sending build context to Docker daemon 1.797MB
Step 1/14 : FROM node:8-alpine AS base
---> 2b8fcdc6230a
Step 2/14 : WORKDIR /app
---> Using cache
---> 2f5194e0f321
Step 3/14 : COPY package.json .
---> Using cache
---> dd7a6bb4e2f2
Step 4/14 : RUN npm set progress=false && npm config set depth 0
---> Using cache
---> 64f0f9bd880c
Step 5/14 : RUN npm install --only=production --registry=https://registry.npm.taobao.org
---> Using cache
---> 493907003ec3
Step 6/14 : RUN cp -R node_modules prod_node_modules
---> Using cache
---> fbdd30f8251d
Step 7/14 : RUN npm install --registry=https://registry.npm.taobao.org
---> Using cache
---> 11412722a789
Step 8/14 : FROM base As test
---> 11412722a789
Step 9/14 : COPY . /app
---> 78d3d562a7be
Step 10/14 : RUN npm test
---> Running in 9106c2adc96e
> [email protected] test /app
> node_modules/mocha/bin/mocha
Array
#indexOf()
✓ should return -1 when the value is not present
1 passing (5ms)
Removing intermediate container 9106c2adc96e
---> 40ac0fe678cf
Step 11/14 : FROM base AS release
---> 11412722a789
Step 12/14 : COPY --from=base /app/prod_node_modules /app/node_modules
---> f1a3aef03736
Step 13/14 : COPY . /app
---> 083d3a927c98
Step 14/14 : CMD ["npm","start"]
---> Running in aaee7341a2e1
Removing intermediate container aaee7341a2e1
---> 7953078a90a0
Successfully built 7953078a90a0
Successfully tagged harbor.od.com/public/derrick-nodejs-demo:v1
The push refers to repository [harbor.od.com/public/derrick-nodejs-demo]
f9b4ddec6b27: Pushed
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6b27de954cca: Pushed
v1: digest: sha256:509794c9029afd128b93a11a8d7e32e5561061aeffb2ae25f7e0e1c0d780cc75 size: 2830
service/derrick-nodejs-demo created
deployment.extensions/derrick-nodejs-demo created
Your application has been up to running! You can run `kubectl get svc` to get exposed ports.