Docker之3---java业务镜像制作

Docker之3---java业务镜像制作

一、制作tomcat镜像:

基本架构图:

img

1、制作JDK镜像

基于官方提供的centos7.2.1511基础镜像构建JDK和tomcat镜像,先构建JDK镜像,然后再基于JDK镜像构建tomcat镜像。

JDK下载路径:https://www.oracle.com/technetwork/java/javase/downloads/index.html

选择架构版本:

img

(1)先下载基础centos镜像

docker pull centos

(2)搭建JDK镜像

mkdir /opt/dockerfile/{web/{nginx,tomcat,jdk,apache},system/{centos,ubuntu,redhat}} -p
# 先创建存放镜像目录

(3)创建一个Dockerfile文件

cat >  /opt/dockerfile/system/centos/Dockerfile <<EOF
FROM centos
 
RUN yum install epel-release -y  && yum  install  vim iotop bc gcc gcc-c++ glibc glibc-devel pcre \
pcre-devel openssl  openssl-devel zip unzip zlib-devel  net-tools \
lrzsz tree   telnet lsof tcpdump wget libevent libevent-devel \
bc  systemd-devel bash-completion traceroute -y &&  useradd nginx -u 2019 && useradd tomcat -u  2020 &&  rm -rf /etc/localtime && ln -sv /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
EOF

(5)创建一个build脚本

[root@centos-7 centos]# cat build-command.sh
#!/bin/bash
 
docker build -t centos-base:7.6.1810 .

(6)执行脚本,创建一个安装基础命令的centos系统镜像

bash build-command.sh

(8)切换到jdk目录下,创建指定的jdk版本目录,制作profile环境变量文件,并制作JDK镜像

切换到指定的jdk目录下,并将下载下来的jdk文件传到/opt/dockerfile/web/jdk/8u92目录下

[root@centos-7 dockerfile]# cd /opt/dockerfile/web/jdk/
[root@centos-7 jdk]# mkdir 8u92

创建profile文件

[root@centos-7 8u92]# cat profile  #在当前目录下创建profile环境变量文件
# /etc/profile
 
# System wide environment and startup programs, for login setup
# Functions and aliases go in /etc/bashrc
 
# It's NOT a good idea to change this file unless you know what you
# are doing. It's much better to create a custom.sh shell script in
# /etc/profile.d/ to make custom changes to your environment, as this
# will prevent the need for merging in future updates.
 
pathmunge () {
    case ":${PATH}:" in
        *:"$1":*)
            ;;
        *)
            if [ "$2" = "after" ] ; then
                PATH=$PATH:$1
            else
                PATH=$1:$PATH
            fi
    esac
}
 
 
if [ -x /usr/bin/id ]; then
    if [ -z "$EUID" ]; then
        # ksh workaround
        EUID=`/usr/bin/id -u`
        UID=`/usr/bin/id -ru`
    fi
    USER="`/usr/bin/id -un`"
    LOGNAME=$USER
    MAIL="/var/spool/mail/$USER"
fi
 
# Path manipulation
if [ "$EUID" = "0" ]; then
    pathmunge /usr/sbin
    pathmunge /usr/local/sbin
else
    pathmunge /usr/local/sbin after
    pathmunge /usr/sbin after
fi
 
HOSTNAME=`/usr/bin/hostname 2>/dev/null`
HISTSIZE=1000
if [ "$HISTCONTROL" = "ignorespace" ] ; then
    export HISTCONTROL=ignoreboth
else
    export HISTCONTROL=ignoredups
fi
 
export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE HISTCONTROL
 
# By default, we want umask to get set. This sets it for login shell
# Current threshold for system reserved uid/gids is 200
# You could check uidgid reservation validity in
# /usr/share/doc/setup-*/uidgid file
if [ $UID -gt 199 ] && [ "`/usr/bin/id -gn`" = "`/usr/bin/id -un`" ]; then
    umask 002
else
    umask 022
fi
 
for i in /etc/profile.d/*.sh /etc/profile.d/sh.local ; do
    if [ -r "$i" ]; then
        if [ "${-#*i}" != "$-" ]; then
            . "$i"
        else
            . "$i" >/dev/null
        fi
    fi
done
 
unset i
unset -f pathmunge
 
export JAVA_HOME=/usr/local/jdk
export TOMCAT_HOME=/apps/tomcat
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$TOMCAT_HOME/bin:$PATH
export CLASSPATH=.$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib:$JAVA_HOME/lib/tools.jar

创建Dockerfile文件和build脚本

[root@centos-7 8u92]# cat Dockerfile
FROM centos-base:7.6.1810
MAINTAINER  96348122@qq.com
ADD jdk-8u192-linux-x64.tar.gz /usr/local/src 
 
RUN ln -sv /usr/local/src/jdk1.8.0_192 /usr/local/jdk  # 创建软链接之前需要解压文件,查看解压后的目录是什么,再进行软链接
ADD profile /etc/profile
 
ENV JAVA_HOME /usr/local/jdk
ENV JRE_HOME $JAVA_HOME/jre
ENV CLASSPATH $JAVA_HOME/lib/:$JRE_HOME/lib/
ENV PATH $PATH:$JAVA_HOME/bin
[root@centos-7 8u92]# cat build-command.sh
#!/bin/bash
docker build -t jdk-base:1.8.0.192 .

(9)执行命令,创建jdk镜像:

[root@centos-7 8u92]# bash build-command.sh

(10)在容器中测试jdk镜像:

[root@centos-7 8u92]# docker images  #先查看创建好的jdk镜像
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
jdk-base            1.8.0.192           830c0d4f0279        6 minutes ago       903MB
centos-base         7.6.1810            d12613615be1        23 minutes ago      507MB
centos              7.6.1810            0f3e07c0138f        3 months ago        220MB
centos              latest              0f3e07c0138f        3 months ago        220MB
You have new mail in /var/spool/mail/root
[root@centos-7 8u92]# docker run -it --rm jdk-base:1.8.0.192 bash
[root@a6be7a88a684 /]# java -version  #然后看看java版本
java version "1.8.0_192"
Java(TM) SE Runtime Environment (build 1.8.0_192-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.192-b12, mixed mode)

此时jdk镜像制作完成

2、制作tomcat镜像

tomcat下载:https://archive.apache.org/dist/tomcat/tomcat-8/  

1、切换到创建的tomcat目录下,并创建一个tomcat-base目录

[root@centos-7 tomcat]#cd  /opt/dockerfile/web/tomcat
[root@centos-7 tomcat]# mkdir tomcat-base
[root@centos-7 tomcat]# cd tomcat-base/

2、然后在tomcat-base目录下创建Dockerfile和build脚本

[root@centos-7 tomcat-base]# cat Dockerfile  # 创建Dockerfile文件
FROM jdk-base:1.8.0.192
 
MAINTAINER 2973707860@qq.com
 
ADD  apache-tomcat-8.5.37.tar.gz /apps 
RUN ln -sv /apps/apache-tomcat-8.5.37 /apps/tomcat
 
[root@centos-7 tomcat-base]# cat build-command.sh  # 创建build脚本
#!/bin/bash
docker build -t tomcat-base:8.5.37 .   # 执行的脚本是创建一个tomcat-base:8.5.37版本的tomcat

执行build-command.sh脚本

# bash build-command.sh

3、将Dockerfile、build脚本与要执行的tomcat脚本进行分离,因此在/opt/dockerfile/web/tomcat/目录下创建一个目录:tomcat-app1

[root@centos-7 tomcat]# mkdir tomcat-app1
[root@centos-7 tomcat]# cd tomcat-app1

4、如果宿主机安装好了tomcat文件,然后修改里边的sever.xml文件,指定index.html文件路径。

vim  /etc/tomcat/conf/server.xml #修改本地的server.xml文件并传到此目录下
<Host name="localhost"  appBase="/data/tomcat/webapps"  unpackWARs="true" autoDeploy="true">  # 指定存放代码路径到 /data/tomcat/webapps目录下

5、创建一个index.html测试页面

[root@centos-7 tomcat-app1]# cat index.html
tomcat web app1 page
[root@centos-7 tomcat-app1]# tar zcvf code.tar.gz index.html  #并将指定的代码进行压缩
index.html  

6、创建Dockerfile文件和run_tomcat.sh脚本

[root@centos-7 tomcat-app1]# cat Dockerfile  # 创建Dockerfile文件
FROM tomcat-base:8.5.37
 
maintainer 2973707860@qq.com
 
ADD code.tar.gz /data/tomcat/webapps/app1    # webapps默认下面访问的是ROOT目录下的文件,如果创建的是ROOT目录,访问网页时,不需要指定ROOT目录,都是缺省路径,如果访问app1目录代码,需要将代码放在app1目录下
ADD run_tomcat.sh /apps/tomcat/bin/run_tomcat.sh 
ADD server.xml  /apps/tomcat/conf
RUN chown -R  tomcat.tomcat /apps/apache-tomcat-8.5.37 /apps/tomcat  /data/tomcat  # 修改tomcat相关文件的权限
EXPOSE 8080 8443
 
CMD ["/apps/tomcat/bin/run_tomcat.sh"]  #调用run_tomcat.sh脚本<br>
[root@centos-7 tomcat-app1]# cat run_tomcat.sh  # 创建run_tomcat.sh脚本
#!/bin/bash
source /etc/profile
echo "1.2.1.3 www.google.net" >> /etc/hosts  # 可以修改
su - tomcat -c "/apps/tomcat/bin/catalina.sh start"  #以后台运行
#su - tomcat -c "/apps/tomcat/bin/catalina.sh  run" #以前台运行
tail -f /etc/hosts  # 为了测试拉起容器,执行脚本时,可以运行起tomcat,没有此命令,就会运行完容器又会退出tomcat服务
 
[root@centos-7 tomcat-app1]# cat build-command.sh # 创建build脚本
#!/bin/bash
docker build -t tomcat-app1:v1 .

7、执行build-command.sh脚本

# chmod +x run_tomcat.sh  # 给脚本加上执行权限
# bash build-command.sh

8、创建的tomcat-app1目录下的文件:

[root@centos-7 tomcat-app1]# ls
build-command.sh  code.tar.gz  Dockerfile  index.html  run_tomcat.sh  server.xml

9、启动docker容器里的tomcat-app1:v1的镜像

[root@centos-7 tomcat-app1]# docker images   #查看所有的镜像
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
tomcat-app1         v1                  98e44ecbf074        2 hours ago         931MB
tomcat-base         8.5.37              21ab497620f2        2 hours ago         917MB
jdk-base            1.8.0.192           830c0d4f0279        3 hours ago         903MB
centos-base         7.6.1810            d12613615be1        3 hours ago         507MB
centos              7.6.1810            0f3e07c0138f        3 months ago        220MB
centos              latest              0f3e07c0138f        3 months ago        220MB
[root@centos-7 tomcat-app1]# docker run -it --rm -p 8080:8080 tomcat-app1:v1 bash  # 映射8080端口,才能启动tomcat服务
[root@95a92b580338 /]# su - tomcat -c "/apps/tomcat/bin/catalina.sh start"  # 启动tomcat服务
Using CATALINA_BASE:   /apps/tomcat
Using CATALINA_HOME:   /apps/tomcat
Using CATALINA_TMPDIR: /apps/tomcat/temp
Using JRE_HOME:        /usr/local/jdk
Using CLASSPATH:       /apps/tomcat/bin/bootstrap.jar:/apps/tomcat/bin/tomcat-juli.jar
Tomcat started.

10、查看测试页面,此时就可以访问了

img

此时JAVA业务镜像制作成功!!!!

如果想创建第二个服务怎么办?

答:方法很简单,只需要将tomcat-app1目录复制一份,修改里边的build-command.sh、index.html文件即可

[root@centos-7 tomcat-app1]# pwd
/opt/dockerfile/web/tomcat/tomcat-app1
[root@centos-7 tomcat-app1]# cd ..
[root@centos-7 tomcat]# ls
tomcat-app1  tomcat-base
[root@centos-7 tomcat]# cp -r tomcat-app1/ tomcat-app2  # 复制 tomcat-app1为tomcat-app2
[root@centos-7 tomcat]# cd tomcat-app2

修改index.html文件

# vim  index.html
tomcat web app2 page

修改build-command.sh文件,修改后执行此脚本创建的tomcat镜像就是tomcat-app2:v1

#!/bin/bash
docker build -t tomcat-app2:v1 .

将index.html文件打包

[root@centos-7 tomcat-app2]# tar -zcvf code.tar.gz index.html 
index.html

执行build-command.sh脚本

# basn build-command.sh

进入容器启动tomcat-app2:v1镜像,启动tomcat服务

[root@59113590db18 /]# su - tomcat -c "/apps/tomcat/bin/catalina.sh start"
Using CATALINA_BASE:   /apps/tomcat
Using CATALINA_HOME:   /apps/tomcat
Using CATALINA_TMPDIR: /apps/tomcat/temp
Using JRE_HOME:        /usr/local/jdk
Using CLASSPATH:       /apps/tomcat/bin/bootstrap.jar:/apps/tomcat/bin/tomcat-juli.jar
Tomcat started.

访问网页测试效果,访问成功!!!

img

此时不同的tomcat镜像制作成功!!!!

实战二、源码编译安装haproxy

1、官网下载haproxy源码包:https://www.haproxy.org/

[root@centos-7 haproxy]# cd /opt/dockerfile/web/haproxy  #切换到此目录下
[root@centos-7 haproxy]# cat Dockerfile   #创建Dockerfile文件
FROM centos-base:7.6.1810    #从上面创建好的centos基础镜像进行调用
 
MAINTAINER liu  2973707860@qq.com
 
ADD haproxy-1.8.17.tar.gz /usr/local/src  #解压下载的haproxy包
RUN yum groupinstall "development tools" -y  # 安装开发包组
RUN yum install systemd-devel -y &&  cd /usr/local/src/haproxy-1.8.17 && make  ARCH=x86_64 TARGET=linux2628 USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 USE_SYSTEMD=1  USE_CPU_AFFINITY=1  PREFIX=/usr/local/haproxy && make install PREFIX=/usr/local/haproxy && cp haproxy  /usr/sbin/ && mkdir /usr/local/haproxy/run
 
ADD haproxy.cfg /etc/haproxy/haproxy.cfg  # 添加自己需要修改的配置文件
 
ADD run_haproxy.sh /usr/bin/run_haproxy.sh # 指定脚本放在哪个目录下
 
EXPOSE 80 9999
 
CMD ["/usr/bin/run_haproxy.sh"]
 
 
 
[root@centos-7 haproxy]# cat built-command.sh   #创建built-command.sh脚本
#!/bin/bash
docker build -t centos-haproxy:v1.8.17 .  #创建centos-haproxu:v1.8.17tag的镜像
 
 
 
[root@centos-7 haproxy]# #!/bin/bash
[root@centos-7 haproxy]# cat run_haproxy.sh  #创建run_haproxy.sh脚本
#!/bin/bash
 
haproxy -f /etc/haproxy/haproxy.cfg  # 执行此脚本,运行haproxy
 
tail -f /etc/hosts

2、需要将指定的配置文件都存放在此目录下

[root@centos-7 haproxy]# pwd
/opt/dockerfile/web/haproxy
[root@centos-7 haproxy]# ls
built-command.sh  Dockerfile  haproxy-1.8.17.tar.gz  haproxy.cfg  run_haproxy.sh  #指定需要的文件

3、执行build-command.sh脚本,创建haproxy镜像

# chmod +x  run_haproxy.sh  #将 run_haproxu,sh加上执行权限,否则无法在容器里运行镜像
# bash build-command.sh

4、运行docker容器里的镜像

[root@centos-7 haproxy]# docker run -it --rm -p 80:80 -p 9999:9999 centos-haproxy:v1.8.17
127.0.0.1   localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
172.17.0.2  a0dcecc6a36a

5、进行网页测试

img

此时haproxy源码编译的镜像完成!!!

实战三、实现一次构建,到处运行的镜像

架构图:

img

环境准备:

类型 IP地址 服务器角色
A 192.168.7.100 tomcat-app1
B 192.168.7.101 tomcat-app2
C 192.168.7.102 HAProxy调度器

1、在A主机将以上的实验tomcat、haproxy镜像导出来

[root@centos-7 ~]# docker  save tomcat-app1:v1 >  /opt/tomcat-app1.tar.gz
[root@centos-7 ~]# docker  save tomcat-app2:v1 >  /opt/tomcat-app2.tar.gz
[root@centos-7 ~]# docker  save centos-haproxy:v1 >  /opt/haproxy.tar.gz

2、导出来的镜像传到其他B和C主机,并在其他主机进行导入制作好的镜像

[root@centos-7 ~]# scp  /opt/tomcat-app1.tar.gz  192.168.7.101:
[root@centos-7 ~]# scp  /opt/haproxy.tar.gz  192.168.7.101:

3、在B和C主机上安装docker-ce的yum源仓库,然后再进行安装docker-ce

[root@centos-7 haproxy-1.8.17]# cd /etc/yum.repos.d/  #切换到yum仓库
[root@centos-7 yum.repos.d]# wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo  #下载阿里云官网docker-ce的yum源
[root@centos-7 haproxy-1.8.17]# systemctl start docker  启动docker
[root@centos-7 haproxy-1.8.17]# systemctl enable docker

4、将传递过来的镜像导入到docker容器中

docker load -i tomcat-app2.tar.gz

5、启动tomcat-app1和tomcat-app2的镜像服务

[root@centos-7 opt]# docker run -d -it --rm -p 8801:8080 tomcat-app1:v1  # 启动A主机的tomcat服务
[root@centos-7 ~]# docker run -it -d --rm -p 8802:8080 tomcat-app2:v1    # 启动B主机的tomcat服务
9b4a5defaffecccf7a269b95850cb514b001cada6cbe468fdf895efb4567476a

6、修改A主机的haproxy配置文件,指向两个后端的Tomcat服务器

vim /opt/dockerfile/web/haproxy/haproy.cfg

global
maxconn 100000
chroot /usr/local/haproxy
#stats socket /var/lib/haproxy/haproxy.sock mode 600 level admin
uid 99
gid 99
daemon
#nbproc 2
#cpu-map 1 0
#cpu-map 2 1
pidfile /usr/local/haproxy/run/haproxy.pid
log 127.0.0.1 local3 info
 
defaults
option http-keep-alive
option  forwardfor
maxconn 100000
mode http
timeout connect 300000ms
timeout client  300000ms
timeout server  300000ms
 
listen stats
 mode http
 bind 0.0.0.0:9999
 stats enable
 log global
 stats uri     /haproxy-status
 stats auth    haadmin:123456
 
listen  web_port
 bind 0.0.0.0:80
 mode http
 log global
 server web1  192.168.7.100:8801  check inter 3000 fall 2 rise 5  # 指向后端的服务器
 server web2  192.168.7.101:8802  check inter 3000 fall 2 rise 5  # 指向后端服务器

7、A主机重新制作haproxy镜像  

# bash build-command.sh

8、将A主机的haproxy镜像传到C服务器上,然后倒入到容器中

# scp centos-haproxy.tar.gz  192.168.7.102:
# docker load -i centos-haproxy.tar.gz  # 将文件传到容器中

9、启动C主机的haproxy服务  

[[A[root@centos-7 haproxy]# docker run -it -d  --rm -p 80:80 -p 9999:9999 centos-haproxy:v1.8.17
c1c4f85050b3d4ee8ab5323536d7636d511ba9835b858ee7814f5b218f699e1d

访问测试页面,此时就实现了基本的轮询调度访问后端tomcat服务,此实验完成!!!

img

img

posted @ 2021-01-02 18:38  原因与结果  阅读(395)  评论(0编辑  收藏  举报