1、安装docker并修改阿里云仓库地址，并重启
yum -y install docker
service enabled docker
vim /etc/docker/daemon.json
{
"registry-mirrors": ["https://mj9kvemk.mirror.aliyuncs.com"]
}
service restart docker
2、修改/etc/yum.repos.d/CentOS-Base.repo不校验签名
sed -i 's/gpgcheck=1/gpgcheck=0/g' /etc/yum.repos.d/*
yum makecache fast
yum repolist
3、编写Dockerfile
cd /home
[root@VM-0-17-centos home]# cat Dockerfile
FROM centos:7
MAINTAINER wangmiao
ENV VERSION=8.5.39
ENV JAVA_HOME /usr/local/jdk
RUN yum install wget -y
RUN wget http://archive.apache.org/dist/tomcat/tomcat-8/v${VERSION}/bin/apache-tomcat-${VERSION}.tar.gz && \
tar zxf apache-tomcat-${VERSION}.tar.gz && \
mv apache-tomcat-${VERSION} /usr/local/tomcat && \
rm -rf apache-tomcat-${VERSION}.tar.gz /usr/local/tomcat/webapps/*
EXPOSE 8080
CMD ["catalina.sh", "run"]
docker build -t tomcat-8.5.39:v1 .
4、构建镜像
[root@VM-0-17-centos home]# docker build -t tomcat-8.5.39:v1 .
Sending build context to Docker daemon 2.048kB
Step 1/8 : FROM centos:7
---> 8652b9f0cb4c
Step 2/8 : MAINTAINER wangmiao
---> Running in c4c696059150
Removing intermediate container c4c696059150
---> af4d67e11f3d
Step 3/8 : ENV VERSION=8.5.39
---> Running in f3d124f3b658
Removing intermediate container f3d124f3b658
---> d0d81031b624
Step 4/8 : ENV JAVA_HOME /usr/local/jdk
---> Running in a862917f3386
Removing intermediate container a862917f3386
---> fa46e96b5e90
Step 5/8 : RUN yum install wget -y
---> Running in eff3529f3235
Loaded plugins: fastestmirror, ovl
Determining fastest mirrors
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
Resolving Dependencies
--> Running transaction check
---> Package wget.x86_64 0:1.14-18.el7_6.1 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
wget x86_64 1.14-18.el7_6.1 base 547 k
Transaction Summary
================================================================================
Install 1 Package
Total download size: 547 k
Installed size: 2.0 M
Downloading packages:
warning: /var/cache/yum/x86_64/7/base/packages/wget-1.14-18.el7_6.1.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Public key for wget-1.14-18.el7_6.1.x86_64.rpm is not installed
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Importing GPG key 0xF4A80EB5:
Userid : "CentOS-7 Key (CentOS 7 Official Signing Key) <security@centos.org>"
Fingerprint: 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5
Package : centos-release-7-9.2009.0.el7.centos.x86_64 (@CentOS)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : wget-1.14-18.el7_6.1.x86_64 1/1
install-info: No such file or directory for /usr/share/info/wget.info.gz
Verifying : wget-1.14-18.el7_6.1.x86_64 1/1
Installed:
wget.x86_64 0:1.14-18.el7_6.1
Complete!
Removing intermediate container eff3529f3235
---> 3d210d3967bd
Step 6/8 : RUN wget http://archive.apache.org/dist/tomcat/tomcat-8/v${VERSION}/bin/apache-tomcat-${VERSION}.tar.gz && tar zxf apache-tomcat-${VERSION}.tar.gz && mv apache-tomcat-${VERSION} /usr/local/tomcat && rm -rf apache-tomcat-${VERSION}.tar.gz /usr/local/tomcat/webapps/*
---> Running in c27c8446913d
--2021-05-18 16:40:29-- http://archive.apache.org/dist/tomcat/tomcat-8/v8.5.39/bin/apache-tomcat-8.5.39.tar.gz
Resolving archive.apache.org (archive.apache.org)... 138.201.131.134, 2a01:4f8:172:2ec5::2
Connecting to archive.apache.org (archive.apache.org)|138.201.131.134|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 9672485 (9.2M) [application/x-gzip]
Saving to: 'apache-tomcat-8.5.39.tar.gz'
0K .......... .......... .......... .......... .......... 0% 63.6K 2m28s
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9400K .......... .......... .......... .......... ..... 100% 18.2K=10m35s
2021-05-18 16:51:05 (14.9 KB/s) - 'apache-tomcat-8.5.39.tar.gz' saved [9672485/9672485]
Removing intermediate container c27c8446913d
---> 4861464041d5
Step 7/8 : EXPOSE 8080
---> Running in 7be2ad1fb6ee
Removing intermediate container 7be2ad1fb6ee
---> 22473080e2e7
Step 8/8 : CMD ["catalina.sh", "run"]
---> Running in 77417e90125d
Removing intermediate container 77417e90125d
---> 5cf4fa7303ad
Successfully built 5cf4fa7303ad
Successfully tagged tomcat-8.5.39:v1
[root@VM-0-17-centos home]#
5、查看构建后的镜像
[root@VM-0-17-centos home]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
tomcat-8.5.39 v1 5cf4fa7303ad 3 minutes ago 330MB
6、把镜像保存到本地文件
docker save tomcat-8.5.39:v1 -o tomcat-8.5.39.tar