Docker container -- create a custom jdk1 8 mirroring

background

During our daily development, we will encounter all kinds of strange problems (stepping on the pit o(╯□ ╯ system) o). This common problem series is the record article series of some problems I encounter every day. Here, we will sort it out and share it with you, so that their little friends who are still in the pit can climb out with ropes. At the same time, you are also welcome to leave messages or private letters to me about your problems. I'll see if they can be solved for you.

development environment

• System: Ubuntu
• Tool: docker

content

Without much nonsense, go straight to the topic:

1. Create the directory we use this time in the host and enter it

mkdir dockerfile_create && cd dockerfile_create/
mkdir docker_jdk && cd docker_jdk/

2. Download jdk1 8. Store it in the docker we just created_ JDK directory, and start the third step under this path.

visit https://www.oracle.com/java/technologies/javase/javase8-archive-downloads.html To download, you need to have an oracle account. You can register one directly or download it at the following address Link: https://pan.baidu.com/s/1n9ulyRlxVsVs4aOxoCIe-w Extraction code: nsjw

3. Write Dockerfile

vim Dockerfile

The contents of the document are as follows

# Basic image file
FROM centos:latest

# Creator of this image
MAINTAINER cnhuashao

# Enter working directory
WORKDIR /opt

# Create a directory we need
RUN mkdir /opt/java

# Put the software package we prepared into the folder we just created
ADD jdk-8u202-linux-x64.tar.gz /opt/java/
 
# Setting environment variables
ENV JAVA_HOME /opt/java/jdk1.8.0_202
ENV JRE_HOME $JAVA_HOME/jre
ENV CLASSPATH $JAVA_HOME/bin/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib:$CLASSPATH
ENV PATH $JAVA_HOME/bin:$PATH

Note that the Dockerfile above is a fixed name and cannot be modified at will. Otherwise, this error will be reported

unable to prepare context: unable to evaluate symlinks in Dockerfile path: lstat /home/cnhuashao/dockerfile_create/docker_jdk/Dockerfile: no such file or directory

4. Start Compiling Based on the above file

docker build -t='centos_jdk' .

Note [.] after the command, Indicates to search in the current directory, - t is to specify an image name, which can be omitted

cnhuashao@cnhuashao:~/dockerfile_create/docker_jdk$ docker build -t='centos_jdk' .
Sending build context to Docker daemon    194MB
Step 1/9 : FROM centos:latest
 ---> 5d0da3dc9764
Step 2/9 : MAINTAINER cnhuashao
 ---> Running in 598c894822dd
Removing intermediate container 598c894822dd
 ---> 24bd4c5e0cb9
Step 3/9 : WORKDIR /opt
 ---> Running in 8ba6c094071a
Removing intermediate container 8ba6c094071a
 ---> 0627b2aa523e
Step 4/9 : RUN mkdir /opt/java
 ---> Running in e26cd5ab1936
Removing intermediate container e26cd5ab1936
 ---> 55f75b7c63c8
Step 5/9 : ADD jdk-8u202-linux-x64.tar.gz /opt/java/
 ---> f4de75816469
Step 6/9 : ENV JAVA_HOME /opt/java/jdk1.8.0_202
 ---> Running in bfe5b73e056f
Removing intermediate container bfe5b73e056f
 ---> ef7bc968af7d
Step 7/9 : ENV JRE_HOME $JAVA_HOME/jre
 ---> Running in 289ec0ed9b4c
Removing intermediate container 289ec0ed9b4c
 ---> e338d2e42572
Step 8/9 : ENV CLASSPATH $JAVA_HOME/bin/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib:$CLASSPATH
 ---> Running in c31b1a27d5c9
Removing intermediate container c31b1a27d5c9
 ---> a38976712316
Step 9/9 : ENV PATH $JAVA_HOME/bin:$PATH
 ---> Running in fd49d2cb3ae3
Removing intermediate container fd49d2cb3ae3
 ---> c62ad4394489
Successfully built c62ad4394489
Successfully tagged centos_jdk:latest

centos is used in our image. When there is no local, it will be automatically pulled according to the preconfigured (default) remote warehouse. The jdk package we use in Dockerfile will be automatically decompressed to the specified directory during compilation.

5. Create a container and enter the test

cnhuashao@cnhuashao:~/dockerfile_create/docker_jdk$ docker images
REPOSITORY   TAG       IMAGE ID       CREATED         SIZE
centos_jdk   latest    c62ad4394489   2 minutes ago   634MB
cnhuashao@cnhuashao:~/dockerfile_create/docker_jdk$ docker run -it centos_jdk /bin/bash
[root@f7565c0dcf12 opt]# java -version
java version "1.8.0_202"
Java(TM) SE Runtime Environment (build 1.8.0_202-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.202-b08, mixed mode)

OK, so far our local image has been created. In the next article, we will talk about how to put it under our own docker hub account. Welcome continuous attention

This document declares that:

Works by cn Huashao use Creative Commons Attribution - non commercial use 4.0 international license agreement License.