Containerization Foundation

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1. Use linux adopt java -jar Deploy the single architecture ,war Bag lost tomcat.
2. Use Docker Deploy the microservice architecture .

The related documents ：

• CI/CD- Enterprise class DevOps
• Docker- first

Catalog * brief introduction

• Containerization foundation
  • establish & Construct a Java application
  • Application packaging
  • Start the container

brief introduction

Cloud native ：Java,C Applications developed by others are called native applications , Deploy to the cloud . The whole process of Cloud Application , And a series of solutions on the cloud .

There are three different ways to deploy cloud computing resources ： Public cloud 、 Private cloud and hybrid cloud . The deployment method adopted depends on the business requirements .

Expand ：VPC

Containerization foundation

Problem solved

• Application build
• • Java、C++、JavaScript
    - Package
• • .exe
    - docker build … Mirror image
• App sharing
• • All software images are placed in a designated place docker hub
    - Android , Application market
• Application and operation
• • Unified standard Mirror image
    - docker run
• …

Resource isolation

• cpu、memory Resource isolation and limitation
• Access device isolation and restriction
• Network isolation and restriction
• user 、 User group isolation restrictions
• …

framework

• Docker_Host：
• • install Docker The host
• Docker Daemon：
• • Running on the Docker Host computer Docker Background processes
• Client：
• • operation Docker The client of the host （ Command line 、UI etc. ）
• Registry：
• • Mirror warehouse
    - Docker Hub
• Images：
• • Mirror image , Packaged program with environment , You can start and run directly
• Containers：
• • Containers , A running program started by the image

Interactive logic

packed Docker, Then go to Software market seek Mirror image , Download and run , see Containers Troubleshooting such as status log .

Actual battle plan

Go to Docker hub, Find the mirror image .

establish & Construct a Java application

Code address ：https://gitee.com/zwtgit/dockerdemo

preparation

Incidental ：Docker install Redis, Deploy video ,https://www.bilibili.com/video/BV13Q4y1C7hS?p=20

Go to Docker hub, Find the mirror image , There are detailed documents in it .

start-up ,https://hub.docker.com/_/redis

docker run --help

docker run [OPTIONS] IMAGE [COMMAND] [ARG...]

#redis Start with a custom profile 
docker run -v /data/redis/redis.conf:/etc/redis/redis.conf \
-v /data/redis/data:/data \
-d --name myredis \
-p 6379:6379 \
redis:latest  redis-server /etc/redis/redis.conf

Application packaging

To write Dockerfile Package and mirror your application .

before

Java For example

• SpringBoot Package into executable jar
• hold jar Upload the package to the service
• Server running java -jar

After packaging in the plug-in, you can see jar perhaps war Corresponding package and location , It can be used locally java -jar Command test .

Now?

All machines are equipped with Docker, Any application is a mirror , All machines can run .

I take a taxi here war package .

FROM openjdk:8-jdk-slim
LABEL maintainer=leifengyang

COPY target/*.war /app.war

ENTRYPOINT ["java","-jar","/app.war"]

docker structure , The last dot indicates that you are working in the current directory .

docker build -t java-demo:v1.0 .

Start the container

docker run -d -p 8080:8080 --name mydockerfiletest-app java-demo:v1.0 

#  Sign in docker hub
docker login

# Name the old image 
docker tag java-demo:v1.0  leifengyang/java-demo:v1.0

#  Pushed to the docker hub
docker push leifengyang/java-demo:v1.0

#  Other machines 
docker pull leifengyang/java-demo:v1.0

#  Other machines run 
docker run -d -p 8080:8080 --name myjava-app java-demo:v1.0 

• brief introduction

• Containerization foundation

• establish & Construct a Java application

• Application packaging

• Start the container

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