Containerization Foundation

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

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