Build your own docker image

Program ape Owen 2021-01-23 16:06:35
build docker image

Today, let's play how to build our own docker Mirror image , And then we'll try to put the local springboot The project is packaged as a mirror , And then send it to the remote server docker in , Finally, we run this docker Image successfully accessed ;

Notice in advance : Need to know docker Basic operation , How to pull the mirror image , Start the container ; And the cloud server is centos7


1. Manually build a jdk8 Mirror image

We know docker Each mirror image of the image is actually a separate linux operating system , It's just that different images have different software ;

So how do we make a mirror of ourselves ? It's definitely impossible to do one first linux Image of the operating system , It's a shame .....

The solution is when we're making a mirror of ourselves , You need to rely on one linux Mirror image , It's like a class , You need to inherit a parent class and then you have all the functions of the parent class , Then just focus on developing your own features ;

So the essence of being a mirror is that we are linux Based on the mirror image , Let's install something for it , And then it's packaged into a mirror image , That's it , be prone to ;


1.1. Get ready

First of all to prepare jdk8 And a file named docker_jdk8 The file of , This file name is optional


then docker Take one centos7 Mirror image :docker pull centos:7


1.2 To write docker_jdk8 file

This docker_jdk8 It's really just a dockerfile The file of , Mainly some special keywords +linux command , The key words are as follows :


Write file , Pay attention to the name of the installation package and the name after decompression

# Dependent image name and version number FROM centos:7# Specify image creator information , You can write here at will MAINTAINER java Little newcomer # Switch working directory , This is when you go into the directory where the container is located WORKDIR /usr# Create a directory RUN mkdir /usr/local/java# hold jdk Add the compressed package to the container and unzip it ADD jdk-8u171-linux-x64.tar.gz /usr/local/java/# To configure java environment variable ENV JAVA_HOME /usr/local/java/jdk1.8.0_171ENV JRE_HOME $JAVA_HOME/jreENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib:$CLASSPATHENV PATH $JAVA_HOME/bin:$PATH


When the papers are finished , Use the command to package the image :docker build -f ./docker_jdk8 -t myjdk1.8:1.0 .     -f Means to perform dockerfile File path ,-t Represents the name of the packaged image , The colon indicates the version of our image


Look at the mirror image , We can see that our own image has been made ;

You can use commands :docker run -it myjdk1.8 /bin/bash    Go into the container and have a look jdk Is the configuration successful? ( Be careful , Use this command to enter the container , Each time a new container is created , You can start , And then use docker exec -it Containers id /bin/bash Into the container )




2. Set up private warehouse

We created such a powerful one jdk8 Mirror image , We can't use it alone , We definitely need our little friends to use it , Happiness is something to share ( ̄▽ ̄)ノ

And we can't build this image manually when we change a server , We don't want to do this kind of repetitive work ;

So we need to build a private warehouse , Throw the image we made into a private warehouse , Then, if you want to use it, you can just pull it ;

2.1  Pull the private warehouse image

A private warehouse is essentially a docker Mirror image , We use commands :docker pull registry


  2.2. modify docker The configuration file

Use command :vim /etc/docker/daemon.json

The first configuration here is docker Source , Increase download speed ; The second is to configure the private warehouse address , Fill in yours. ip, Give Way docker Trust your private warehouse

Be careful , The port of private warehouse is 5000 port , We will use this port when we start the private warehouse container ;

{ "registry-mirrors": [ "", "", "" ], "insecure-registries":[" Your machine ip:5000"]}


2.3  Use private warehouses

Because I changed the configuration file , First we need to restart docker:systemctl restart docker

Then start the private warehouse container :docker run -id --name registry -p 5000:5000 registry

Be careful , The binding of 5000 Port !!!

Then according to the path below, you can see that this is a success !


  2.4.  Upload the image

What we did before jdk8 Put your image in this private warehouse ;

First of all, we have to mark our image :docker tag myjdk1.8:1.0    



Be careful , The last name is you linux Server's ip Address plus port of private warehouse , The role of markers , You can see that you can better distinguish between private warehouse images and images pulled from public warehouses , The name has to be in this format , The following push is based on this name ip And port to private warehouse


Then push the marked image to the private warehouse :docker push   

Let's look at the image in the private warehouse :


 3.sprignboot Project configuration docker

Server deployment java There are many ways to project :

Initially deployed on the server javaweb project , First installation tomcat, Configure environment variables , And then type our project into war Bag to tomcat Medium webapp in , start-up tomcat, Then you can access it

Later, I used springboot after , We can springboot The project is packaged into a jar package , And then use nohup java -jar app.jar &  Running a project in this way , Then you can access it ;

Then use the docker after , We don't need to install it manually tomcat 了 , You can use it directly tomcat Mirror image , Start the container , And then put it in the container tomcat Of webapp The directory is attached to xxx Catalog , We just need to put the project war The packet is lost to the host xxx Catalog , Then start tomcat The container will be able to access

But the above way still needs us to manually play war package , Drop it on the server , tedious , We can also simplify it : stay springboot Configuration in the project docker plug-in unit , We just need to enter the packing command , You can package the project into a docker Mirror image , Upload to docker In a private warehouse , Others can also pull the image startup container in the private warehouse ;

3.1  Get ready

First , Let's just create one springboot project


3.2  stay pom.

Let's see. pom.

<??><project ="" =.........
本文为[Program ape Owen]所创,转载请带上原文链接,感谢

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