k8s实战案例之部署Nginx+Tomcat+NFS实现动静分离

1、基于镜像分层构建及自定义镜像运行Nginx及Java服务并基于NFS实现动静分离

1.1、业务镜像设计规划

根据业务的不同，我们可以导入官方基础镜像，在官方基础镜像的基础上自定义需要用的工具和环境，然后构建成自定义出自定义基础镜像，后续再基于自定义基础镜像，来构建不同服务的基础镜像，最后基于服务的自定义基础镜像构建出对应业务镜像；最后将这些镜像上传至本地harbor仓库，然后通过k8s配置清单，将对应业务运行至k8s集群之上；

1.2、Nginx+Tomcat+NFS实现动静分离架构图

客户端通过负载均衡器的反向代理来访问k8s上的服务， nginx pod和tomcat pod 由k8s svc 资源进行关联；所有数据（静态资源和动态资源）通过存储挂载至对应pod中；nginx作为服务入口，它负责接收客户端的请求，同时响应静态资源（到存储上读取，比如js文件，css文件，图片等）；后端动态资源，由nginx将请求转发至后端tomcat server 完成（tomcat负责数据写入，比如用户的上传的图片等等）；

2、自定义centos基础镜像构建

root@k8s-master01:~/k8s-data/dockerfile/system/centos# ls
CentOS7-aliyun-Base.repo  CentOS7-aliyun-epel.repo  Dockerfile  build-command.sh  filebeat-7.12.1-x86_64.rpm
root@k8s-master01:~/k8s-data/dockerfile/system/centos# cat Dockerfile 
#自定义Centos 基础镜像
FROM centos:7.9.2009 
ADD filebeat-7.12.1-x86_64.rpm /tmp
# 添加阿里源
ADD CentOS7-aliyun-Base.repo  CentOS7-aliyun-epel.repo /etc/yum.repos.d/  
# 自定义安装工具和环境
RUN yum makecache &&yum install -y /tmp/filebeat-7.12.1-x86_64.rpm vim wget tree  lrzsz gcc gcc-c++ automake pcre pcre-devel zlib zlib-devel openssl openssl-devel iproute net-tools iotop &&  rm -rf /etc/localtime /tmp/filebeat-7.12.1-x86_64.rpm && ln -snf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime  && useradd nginx -u 2088
root@k8s-master01:~/k8s-data/dockerfile/system/centos# cat build-command.sh 
#!/bin/bash
#docker build -t  harbor.ik8s.cc/baseimages/magedu-centos-base:7.9.2009 .
#docker push harbor.ik8s.cc/baseimages/magedu-centos-base:7.9.2009

/usr/local/bin/nerdctl build -t harbor.ik8s.cc/baseimages/magedu-centos-base:7.9.2009 .
/usr/local/bin/nerdctl push harbor.ik8s.cc/baseimages/magedu-centos-base:7.9.2009
root@k8s-master01:~/k8s-data/dockerfile/system/centos# 

2.1、构建自定义centos基础镜像

2.2、验证自定义centos基础镜像

在harbor上验证镜像是否正常上传？

运行镜像为容器，验证对应镜像是否有我们添加的工具和环境？

3、基于自定义centos基础镜像构建nginx镜像

root@k8s-master01:~/k8s-data/dockerfile/web/pub-images/nginx-base# ls
Dockerfile  build-command.sh  nginx-1.22.0.tar.gz
root@k8s-master01:~/k8s-data/dockerfile/web/pub-images/nginx-base# cat Dockerfile 
#Nginx Base Image
# 导入自定义centos基础镜像
FROM harbor.ik8s.cc/baseimages/magedu-centos-base:7.9.2009 
# 安装编译环境
RUN yum install -y vim wget tree  lrzsz gcc gcc-c++ automake pcre pcre-devel zlib zlib-devel openssl openssl-devel iproute net-tools iotop
# 添加nginx源码至/usr/local/src/
ADD nginx-1.22.0.tar.gz /usr/local/src/
# 编译nginx
RUN cd /usr/local/src/nginx-1.22.0 && ./configure  && make && make install && ln -sv  /usr/local/nginx/sbin/nginx /usr/sbin/nginx  &&rm -rf /usr/local/src/nginx-1.22.0.tar.gz 
root@k8s-master01:~/k8s-data/dockerfile/web/pub-images/nginx-base# cat build-command.sh 
#!/bin/bash
#docker build -t harbor.ik8s.cc/pub-images/nginx-base:v1.18.0  .
#docker push  harbor.ik8s.cc/pub-images/nginx-base:v1.18.0

nerdctl build -t  harbor.ik8s.cc/pub-images/nginx-base:v1.22.0  .
nerdctl push harbor.ik8s.cc/pub-images/nginx-base:v1.22.0
root@k8s-master01:~/k8s-data/dockerfile/web/pub-images/nginx-base# 

3.1、构建自定义nginx基础镜像

3.2、验证自定义nginx基础镜像

验证nginx基础镜像是否上传至harbor？

把nginx基础镜像运行为容器，看看nginx是否正常安装？

能够将nginx基础镜像运行为容器，并在容器内部启动nginx，表示nginx基础镜像就构建好了；

3.3、构建自定义nginx业务镜像

root@k8s-master01:~/k8s-data/dockerfile/web/magedu/nginx# ls
Dockerfile  app1.tar.gz  build-command.sh  index.html  nginx.conf  webapp
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/nginx# cat Dockerfile 
#Nginx 1.22.0
# 导入nginx基础镜像
FROM harbor.ik8s.cc/pub-images/nginx-base:v1.22.0 
# 添加nginx配置文件
ADD nginx.conf /usr/local/nginx/conf/nginx.conf
# 添加业务代码
ADD app1.tar.gz  /usr/local/nginx/html/webapp/
ADD index.html  /usr/local/nginx/html/index.html
# 创建静态资源挂载路径
RUN mkdir -p /usr/local/nginx/html/webapp/static /usr/local/nginx/html/webapp/images 
# 暴露端口
EXPOSE 80 443
# 运行nginx
CMD ["nginx"] 
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/nginx# cat nginx.conf 
user  nginx nginx;
worker_processes  auto;
daemon off;
events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;
    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';
    #access_log  logs/access.log  main;
    sendfile        on;
    #tcp_nopush     on;
    #keepalive_timeout  0;
    keepalive_timeout  65;
    upstream  tomcat_webserver {
        server  magedu-tomcat-app1-service.magedu:80; 
    }

    server {
        listen       80;
        server_name  localhost;
        location / {
            root   html;
            index  index.html index.htm;
        }
        location /webapp {
            root   html;
            index  index.html index.htm;
        }
        location /app1 {
             proxy_pass  http://tomcat_webserver;
             proxy_set_header   Host    $host;
             proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
             proxy_set_header X-Real-IP $remote_addr;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }
}
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/nginx# cat build-command.sh 
#!/bin/bash
TAG=$1
#docker build -t harbor.ik8s.cc/magedu/nginx-web1:${TAG} .
#echo "镜像构建完成，即将上传到harbor"
#sleep 1
#docker push harbor.ik8s.cc/magedu/nginx-web1:${TAG}
#echo "镜像上传到harbor完成"

nerdctl build -t harbor.ik8s.cc/magedu/nginx-web1:${TAG} .
nerdctl push harbor.ik8s.cc/magedu/nginx-web1:${TAG}
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/nginx# 

上述Dockerfile中主要基于nginx基础镜像添加业务代码，添加配置，以及定义运行nginx和暴露服务端口；

3.4、验证自定义nginx业务镜像

验证nginx业务镜像是否上传至harbor？

运行nginx业务镜像为容器，看看对应业务是否能够正常访问？

这里提示找不到magedu-tomcat-app1-service.magedu:80这个upstream ，这是因为我们在配置文件中写死了nginx调用后端tomcat在k8s中 svc的地址；所以该镜像只能运行在k8s环境中，并且在运行该镜像前对应k8s环境中，tomcat的svc必须存在；

4、基于自定义centos基础镜像构建tomcat镜像

4.1、基于自定义centos基础镜像构建jdk基础镜像

root@k8s-master01:~/k8s-data/dockerfile/web/pub-images/jdk-1.8.212# ll
total 190464
drwxr-xr-x 2 root root      4096 Jun  4 04:04 ./
drwxr-xr-x 6 root root      4096 Aug  9  2022 ../
-rw-r--r-- 1 root root       389 Jun  4 04:04 Dockerfile
-rw-r--r-- 1 root root       259 Jun  4 04:02 build-command.sh
-rw-r--r-- 1 root root 195013152 Jun 22  2021 jdk-8u212-linux-x64.tar.gz
-rw-r--r-- 1 root root      2105 Jun 22  2021 profile
root@k8s-master01:~/k8s-data/dockerfile/web/pub-images/jdk-1.8.212# cat Dockerfile 
#JDK Base Image
# 导入自定义centos基础镜像
FROM harbor.ik8s.cc/baseimages/magedu-centos-base:7.9.2009 
# 安装jdk环境
ADD jdk-8u212-linux-x64.tar.gz /usr/local/src/
RUN ln -sv /usr/local/src/jdk1.8.0_212 /usr/local/jdk 
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@k8s-master01:~/k8s-data/dockerfile/web/pub-images/jdk-1.8.212# cat build-command.sh 
#!/bin/bash
#docker build -t harbor.ik8s.cc/pub-images/jdk-base:v8.212  .
#sleep 1
#docker push  harbor.ik8s.cc/pub-images/jdk-base:v8.212

nerdctl build -t  harbor.ik8s.cc/pub-images/jdk-base:v8.212  .
nerdctl push  harbor.ik8s.cc/pub-images/jdk-base:v8.212
root@k8s-master01:~/k8s-data/dockerfile/web/pub-images/jdk-1.8.212# 

4.1.1、构建自定义jdk基础镜像

4.1.2、验证自定义jdk基础镜像

验证jdk基础镜像是否上传至harbor?

运行jdk基础镜像为容器，看看jdk环境是否安装？

能够正常在容器内部执行java 命令表示jdk镜像构建没有问题；

4.2、基于自定义jdk镜像构建tomcat基础镜像

root@k8s-master01:~/k8s-data/dockerfile/web/pub-images/tomcat-base-8.5.43# ll
total 9508
drwxr-xr-x 2 root root    4096 Jun  4 04:23 ./
drwxr-xr-x 6 root root    4096 Aug  9  2022 ../
-rw-r--r-- 1 root root     390 Jun  4 04:22 Dockerfile
-rw-r--r-- 1 root root 9717059 Jun 22  2021 apache-tomcat-8.5.43.tar.gz
-rw-r--r-- 1 root root     275 Jun  4 04:23 build-command.sh
root@k8s-master01:~/k8s-data/dockerfile/web/pub-images/tomcat-base-8.5.43# cat Dockerfile 
#Tomcat 8.5.43基础镜像
# 导入自定义jdk镜像
FROM harbor.ik8s.cc/pub-images/jdk-base:v8.212
# 创建tomcat安装目录、数据目录和日志目录
RUN mkdir /apps /data/tomcat/webapps /data/tomcat/logs -pv 
# 安装tomcat
ADD apache-tomcat-8.5.43.tar.gz  /apps
RUN useradd tomcat -u 2050 && ln -sv /apps/apache-tomcat-8.5.43 /apps/tomcat && chown -R tomcat.tomcat /apps /data -R
root@k8s-master01:~/k8s-data/dockerfile/web/pub-images/tomcat-base-8.5.43# cat build-command.sh 
#!/bin/bash
#docker build -t harbor.ik8s.cc/pub-images/tomcat-base:v8.5.43  .
#sleep 3
#docker push  harbor.ik8s.cc/pub-images/tomcat-base:v8.5.43

nerdctl  build -t harbor.ik8s.cc/pub-images/tomcat-base:v8.5.43  .
nerdctl  push harbor.ik8s.cc/pub-images/tomcat-base:v8.5.43
root@k8s-master01:~/k8s-data/dockerfile/web/pub-images/tomcat-base-8.5.43# 

4.2.1、构建自定义tomcat基础镜像

4.2.2、验证自定义tomcat基础镜像

验证自定义tomcat基础镜像是否上传至harbor？

将自定义tomcat镜像运行为容器，看看tomcat是否可正常访问呢？

root@k8s-node01:~# nerdctl run -it --rm -p 8080:8080 harbor.ik8s.cc/pub-images/tomcat-base:v8.5.43 /bin/bash
WARN[0000] skipping verifying HTTPS certs for "harbor.ik8s.cc" 
harbor.ik8s.cc/pub-images/tomcat-base:v8.5.43:                                    resolved       |++++++++++++++++++++++++++++++++++++++| 
manifest-sha256:ba362a6c099d965ffae43aae04e3ecb15e86e39d9d88259f4be72378b75bd1e5: done           |++++++++++++++++++++++++++++++++++++++| 
config-sha256:1d5e5f5e1dcb8ce1c7f7d6ce9fcc967275309c14baaaddbf3aa86de26054d1d5:   done           |++++++++++++++++++++++++++++++++++++++| 
layer-sha256:fa5fdb4dc02a5e79b212be196324b9936efbc850390f86283498a0e01b344ec3:    done           |++++++++++++++++++++++++++++++++++++++| 
layer-sha256:00bab63d153828acf58242f1781bd40769cc8b69659f37a2a49918ff3bfca68c:    done           |++++++++++++++++++++++++++++++++++++++| 
layer-sha256:6ddb864b9c4e53f3079ec4839ea3bace75b0d5d3daeae0ae910c171646bc4f96:    done           |++++++++++++++++++++++++++++++++++++++| 
elapsed: 2.4 s                                                                    total:  18.6 M (7.7 MiB/s)                                       
[root@f5752bba588f /]# ll /apps/
total 4
drwxr-xr-x 1 tomcat tomcat 4096 Jun  4 12:25 apache-tomcat-8.5.43
lrwxrwxrwx 1 tomcat tomcat   26 Jun  4 12:25 tomcat -> /apps/apache-tomcat-8.5.43
[root@f5752bba588f /]# cd /apps/tomcat/bin/
[root@f5752bba588f bin]# ls
bootstrap.jar       catalina.sh  commons-daemon-native.tar.gz  configtest.sh  digest.sh         shutdown.bat  startup.sh            tool-wrapper.bat  version.sh
catalina-tasks.xml  ciphers.bat  commons-daemon.jar            daemon.sh      setclasspath.bat  shutdown.sh   tomcat-juli.jar       tool-wrapper.sh
catalina.bat        ciphers.sh   configtest.bat                digest.bat     setclasspath.sh   startup.bat   tomcat-native.tar.gz  version.bat
[root@f5752bba588f bin]# ./catalina.sh run
Using CATALINA_BASE:   /apps/tomcat
Using CATALINA_HOME:   /apps/tomcat
Using CATALINA_TMPDIR: /apps/tomcat/temp
Using JRE_HOME:        /usr/local/jdk/jre
Using CLASSPATH:       /apps/tomcat/bin/bootstrap.jar:/apps/tomcat/bin/tomcat-juli.jar
04-Jun-2023 12:40:29.845 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server version:        Apache Tomcat/8.5.43
04-Jun-2023 12:40:29.851 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server built:          Jul 4 2019 20:53:15 UTC
04-Jun-2023 12:40:29.851 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server number:         8.5.43.0
04-Jun-2023 12:40:29.851 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Name:               Linux
04-Jun-2023 12:40:29.852 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Version:            5.15.0-72-generic
04-Jun-2023 12:40:29.852 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Architecture:          amd64
04-Jun-2023 12:40:29.852 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Java Home:             /usr/local/src/jdk1.8.0_212/jre
04-Jun-2023 12:40:29.852 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Version:           1.8.0_212-b10
04-Jun-2023 12:40:29.853 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Vendor:            Oracle Corporation
04-Jun-2023 12:40:29.853 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_BASE:         /apps/apache-tomcat-8.5.43
04-Jun-2023 12:40:29.853 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_HOME:         /apps/apache-tomcat-8.5.43
04-Jun-2023 12:40:29.854 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.config.file=/apps/tomcat/conf/logging.properties
04-Jun-2023 12:40:29.854 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
04-Jun-2023 12:40:29.855 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djdk.tls.ephemeralDHKeySize=2048
04-Jun-2023 12:40:29.855 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.protocol.handler.pkgs=org.apache.catalina.webresources
04-Jun-2023 12:40:29.855 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dorg.apache.catalina.security.SecurityListener.UMASK=0027
04-Jun-2023 12:40:29.856 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dignore.endorsed.dirs=
04-Jun-2023 12:40:29.856 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.base=/apps/tomcat
04-Jun-2023 12:40:29.856 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.home=/apps/tomcat
04-Jun-2023 12:40:29.857 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.io.tmpdir=/apps/tomcat/temp
04-Jun-2023 12:40:29.857 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib]
04-Jun-2023 12:40:30.166 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["http-nio-8080"]
04-Jun-2023 12:40:30.193 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read
04-Jun-2023 12:40:30.232 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["ajp-nio-8009"]
04-Jun-2023 12:40:30.236 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read
04-Jun-2023 12:40:30.237 INFO [main] org.apache.catalina.startup.Catalina.load Initialization processed in 1262 ms
04-Jun-2023 12:40:30.303 INFO [main] org.apache.catalina.core.StandardService.startInternal Starting service [Catalina]
04-Jun-2023 12:40:30.303 INFO [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet Engine: Apache Tomcat/8.5.43
04-Jun-2023 12:40:30.324 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/apps/apache-tomcat-8.5.43/webapps/docs]
04-Jun-2023 12:40:30.918 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/apps/apache-tomcat-8.5.43/webapps/docs] has finished in [593] ms
04-Jun-2023 12:40:30.919 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/apps/apache-tomcat-8.5.43/webapps/examples]
04-Jun-2023 12:40:31.524 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/apps/apache-tomcat-8.5.43/webapps/examples] has finished in [605] ms
04-Jun-2023 12:40:31.524 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/apps/apache-tomcat-8.5.43/webapps/ROOT]
04-Jun-2023 12:40:31.540 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/apps/apache-tomcat-8.5.43/webapps/ROOT] has finished in [16] ms
04-Jun-2023 12:40:31.540 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/apps/apache-tomcat-8.5.43/webapps/manager]
04-Jun-2023 12:40:31.565 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/apps/apache-tomcat-8.5.43/webapps/manager] has finished in [25] ms
04-Jun-2023 12:40:31.565 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/apps/apache-tomcat-8.5.43/webapps/host-manager]
04-Jun-2023 12:40:31.597 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/apps/apache-tomcat-8.5.43/webapps/host-manager] has finished in [32] ms
04-Jun-2023 12:40:31.600 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-nio-8080"]
04-Jun-2023 12:40:31.608 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["ajp-nio-8009"]
04-Jun-2023 12:40:31.611 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in 1373 ms

访问tomcat

能够正常访问tomcat,说明tomcat基础镜像就构建的没有问题；

4.3、基于自定义tomcat镜像构建tomcat业务镜像

root@k8s-master01:~/k8s-data/dockerfile/web/magedu/tomcat-app1# ll
total 23588
drwxr-xr-x  3 root root     4096 Jun  4 04:58 ./
drwxr-xr-x 11 root root     4096 Aug  9  2022 ../
-rw-r--r--  1 root root      603 Jun  4 04:57 Dockerfile
-rw-r--r--  1 root root      144 May 11 06:26 app1.tar.gz
-rwxr-xr-x  1 root root      261 Jun  4 04:58 build-command.sh*
-rwxr-xr-x  1 root root    23611 Jun 22  2021 catalina.sh*
-rw-r--r--  1 root root 24086235 Jun 22  2021 filebeat-7.5.1-x86_64.rpm
-rw-r--r--  1 root root      667 Oct 24  2021 filebeat.yml
drwxr-xr-x  2 root root     4096 May 11 06:26 myapp/
-rwxr-xr-x  1 root root      372 Jan 22  2022 run_tomcat.sh*
-rw-r--r--  1 root root     6462 Oct 10  2021 server.xml
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/tomcat-app1# cat Dockerfile 
#tomcat web1
# 导入自定义tomcat镜像
FROM harbor.ik8s.cc/pub-images/tomcat-base:v8.5.43 
# 添加启动脚本和配置文件
ADD catalina.sh /apps/tomcat/bin/catalina.sh
ADD server.xml /apps/tomcat/conf/server.xml
ADD run_tomcat.sh /apps/tomcat/bin/run_tomcat.sh
# 添加业务代码
ADD app1.tar.gz /data/tomcat/webapps/app1/
#ADD filebeat.yml /etc/filebeat/filebeat.yml 
RUN chown  -R nginx.nginx /data/ /apps/
#ADD filebeat-7.5.1-x86_64.rpm /tmp/
#RUN cd /tmp && yum localinstall -y filebeat-7.5.1-amd64.deb
# 暴露端口
EXPOSE 8080 8443
# 启动tomcat
CMD ["/apps/tomcat/bin/run_tomcat.sh"]
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/tomcat-app1# cat build-command.sh 
#!/bin/bash
TAG=$1
#docker build -t  harbor.ik8s.cc/magedu/tomcat-app1:${TAG} .
#sleep 3
#docker push  harbor.ik8s.cc/magedu/tomcat-app1:${TAG}

nerdctl build -t  harbor.ik8s.cc/magedu/tomcat-app1:${TAG} .
nerdctl push  harbor.ik8s.cc/magedu/tomcat-app1:${TAG}
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/tomcat-app1# 
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/tomcat-app1# cat run_tomcat.sh 
#!/bin/bash
#echo "nameserver 223.6.6.6" > /etc/resolv.conf
#echo "192.168.7.248 k8s-vip.example.com" >> /etc/hosts

#/usr/share/filebeat/bin/filebeat -e -c /etc/filebeat/filebeat.yml -path.home /usr/share/filebeat -path.config /etc/filebeat -path.data /var/lib/filebeat -path.logs /var/log/filebeat &
su - nginx -c "/apps/tomcat/bin/catalina.sh start"
tail -f /etc/hosts
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/tomcat-app1#

4.3.1、构建自定义tomcat业务镜像

4.3.2、验证自定义tomcat业务镜像

验证自定义tomcat业务镜像是否上传至harbor？

将自定义tomcat业务镜像运行为容器，看看对应业务是否正常访问？

访问业务

能够正常访问app1说明业务容器的镜像构建没有问题；

5、在k8s环境中运行tomcat

root@k8s-master01:~/k8s-data/yaml/namespaces# ls
magedu-ns.yaml
root@k8s-master01:~/k8s-data/yaml/namespaces# cat magedu-ns.yaml 
apiVersion: v1
kind: Namespace
metadata: 
  name: magedu
root@k8s-master01:~/k8s-data/yaml/namespaces# cd ../magedu/tomcat-app1/
root@k8s-master01:~/k8s-data/yaml/magedu/tomcat-app1# ll
total 16
drwxr-xr-x  2 root root 4096 Jun  4 06:16 ./
drwxr-xr-x 12 root root 4096 Aug  9  2022 ../
-rw-r--r--  1 root root  596 Jun 22  2021 hpa.yaml
-rw-r--r--  1 root root 1849 Jun  4 05:18 tomcat-app1.yaml
root@k8s-master01:~/k8s-data/yaml/magedu/tomcat-app1# cat hpa.yaml 
#apiVersion: autoscaling/v2beta1
apiVersion: autoscaling/v1 
kind: HorizontalPodAutoscaler
metadata:
  namespace: magedu
  name: magedu-tomcat-app1-podautoscaler
  labels:
    app: magedu-tomcat-app1
    version: v2beta1
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    #apiVersion: extensions/v1beta1 
    kind: Deployment
    name: magedu-tomcat-app1-deployment 
  minReplicas: 2
  maxReplicas: 20
  targetCPUUtilizationPercentage: 60
  #metrics:
  #- type: Resource
  #  resource:
  #    name: cpu
  #    targetAverageUtilization: 60
  #- type: Resource
  #  resource:
  #    name: memory

root@k8s-master01:~/k8s-data/yaml/magedu/tomcat-app1# cat tomcat-app1.yaml 
kind: Deployment
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
metadata:
  labels:
    app: magedu-tomcat-app1-deployment-label
  name: magedu-tomcat-app1-deployment
  namespace: magedu
spec:
  replicas: 1
  selector:
    matchLabels:
      app: magedu-tomcat-app1-selector
  template:
    metadata:
      labels:
        app: magedu-tomcat-app1-selector
    spec:
      containers:
      - name: magedu-tomcat-app1-container
        image: harbor.ik8s.cc/magedu/tomcat-app1:v1
        #command: ["/apps/tomcat/bin/run_tomcat.sh"]
        imagePullPolicy: IfNotPresent
        #imagePullPolicy: Always
        ports:
        - containerPort: 8080
          protocol: TCP
          name: http
        env:
        - name: "password"
          value: "123456"
        - name: "age"
          value: "18"
        #resources:
        #  limits:
        #    cpu: 1
        #    memory: "512Mi"
        #  requests:
        #    cpu: 500m
        #    memory: "512Mi"
        volumeMounts:
        - name: magedu-images
          mountPath: /usr/local/nginx/html/webapp/images
          readOnly: false
        - name: magedu-static
          mountPath: /usr/local/nginx/html/webapp/static
          readOnly: false
      volumes:
      - name: magedu-images
        nfs:
          server: 192.168.0.42
          path: /data/k8sdata/magedu/images
      - name: magedu-static
        nfs:
          server: 192.168.0.42
          path: /data/k8sdata/magedu/static
#      nodeSelector:
#        project: magedu
#        app: tomcat
---
kind: Service
apiVersion: v1
metadata:
  labels:
    app: magedu-tomcat-app1-service-label
  name: magedu-tomcat-app1-service
  namespace: magedu
spec:
  type: NodePort
  ports:
  - name: http
    port: 80
    protocol: TCP
    targetPort: 8080
    nodePort: 30092
  selector:
    app: magedu-tomcat-app1-selector
root@k8s-master01:~/k8s-data/yaml/magedu/tomcat-app1# 

5.1、准备后端存储相关目录

root@harbor:~# mkdir -pv /data/k8sdata/magedu/images
mkdir: created directory '/data/k8sdata/magedu'
mkdir: created directory '/data/k8sdata/magedu/images'
root@harbor:~# mkdir -pv /data/k8sdata/magedu/static
mkdir: created directory '/data/k8sdata/magedu/static'
root@harbor:~# cat /etc/exports 
# /etc/exports: the access control list for filesystems which may be exported
#               to NFS clients.  See exports(5).
#
# Example for NFSv2 and NFSv3:
# /srv/homes       hostname1(rw,sync,no_subtree_check) hostname2(ro,sync,no_subtree_check)
#
# Example for NFSv4:
# /srv/nfs4        gss/krb5i(rw,sync,fsid=0,crossmnt,no_subtree_check)
# /srv/nfs4/homes  gss/krb5i(rw,sync,no_subtree_check)
#
/data/k8sdata/kuboard *(rw,no_root_squash)
/data/volumes *(rw,no_root_squash)
/pod-vol *(rw,no_root_squash)
/data/k8sdata/myserver *(rw,no_root_squash)
/data/k8sdata/mysite *(rw,no_root_squash)

/data/k8sdata/magedu/images *(rw,no_root_squash)
/data/k8sdata/magedu/static *(rw,no_root_squash)
root@harbor:~# exportfs -av
exportfs: /etc/exports [1]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/kuboard".
  Assuming default behaviour ('no_subtree_check').
  NOTE: this default has changed since nfs-utils version 1.0.x

exportfs: /etc/exports [2]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/volumes".
  Assuming default behaviour ('no_subtree_check').
  NOTE: this default has changed since nfs-utils version 1.0.x

exportfs: /etc/exports [3]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/pod-vol".
  Assuming default behaviour ('no_subtree_check').
  NOTE: this default has changed since nfs-utils version 1.0.x

exportfs: /etc/exports [4]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/myserver".
  Assuming default behaviour ('no_subtree_check').
  NOTE: this default has changed since nfs-utils version 1.0.x

exportfs: /etc/exports [5]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/mysite".
  Assuming default behaviour ('no_subtree_check').
  NOTE: this default has changed since nfs-utils version 1.0.x

exportfs: /etc/exports [7]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/images".
  Assuming default behaviour ('no_subtree_check').
  NOTE: this default has changed since nfs-utils version 1.0.x

exportfs: /etc/exports [8]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/static".
  Assuming default behaviour ('no_subtree_check').
  NOTE: this default has changed since nfs-utils version 1.0.x

exporting *:/data/k8sdata/magedu/static
exporting *:/data/k8sdata/magedu/images
exporting *:/data/k8sdata/mysite
exporting *:/data/k8sdata/myserver
exporting *:/pod-vol
exporting *:/data/volumes
exporting *:/data/k8sdata/kuboard
root@harbor:~# 

5.2、将tomcat业务部署至k8s

root@k8s-master01:~/k8s-data/yaml# cd namespaces/
root@k8s-master01:~/k8s-data/yaml/namespaces# ls
magedu-ns.yaml
root@k8s-master01:~/k8s-data/yaml/namespaces# kubectl apply  -f magedu-ns.yaml 
namespace/magedu created
root@k8s-master01:~/k8s-data/yaml/namespaces# ls
magedu-ns.yaml
root@k8s-master01:~/k8s-data/yaml/namespaces# cd ../magedu/tomcat-app1/
root@k8s-master01:~/k8s-data/yaml/magedu/tomcat-app1# ls
hpa.yaml  tomcat-app1.yaml
root@k8s-master01:~/k8s-data/yaml/magedu/tomcat-app1# kubectl apply -f .
horizontalpodautoscaler.autoscaling/magedu-tomcat-app1-podautoscaler created
deployment.apps/magedu-tomcat-app1-deployment created
service/magedu-tomcat-app1-service created
root@k8s-master01:~/k8s-data/yaml/magedu/tomcat-app1#

5.3、验证tomcat pod是否正常running?服务是否可正常访问？

root@k8s-master01:~/k8s-data/yaml/magedu/tomcat-app1# kubectl get pods -n magedu
NAME                                             READY   STATUS    RESTARTS   AGE
magedu-tomcat-app1-deployment-7754c8549c-prglk   1/1     Running   0          2m2s
magedu-tomcat-app1-deployment-7754c8549c-xmg9l   1/1     Running   0          2m17s
root@k8s-master01:~/k8s-data/yaml/magedu/tomcat-app1# kubectl get svc -n magedu    
NAME                         TYPE       CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
magedu-tomcat-app1-service   NodePort   10.100.129.23   <none>        80:30092/TCP   2m23s
root@k8s-master01:~/k8s-data/yaml/magedu/tomcat-app1# 

访问k8s集群节点的30092端口，看看对应tomcat服务是否能够正常访问？

能够通过k8s集群节点访问tomcat服务，说明tomcat服务已经正常部署至k8s环境；

5.4、更改tomcat service 类型为无头服务，重新apply配置清单，让后端tomcat服务只能在k8s内部环境访问

6、在k8s环境中运行nginx，实现nginx+tomcat动静分离

root@k8s-master01:~/k8s-data/yaml/magedu/nginx# cat nginx.yaml
kind: Deployment
apiVersion: apps/v1
metadata:
  labels:
    app: magedu-nginx-deployment-label
  name: magedu-nginx-deployment
  namespace: magedu
spec:
  replicas: 1
  selector:
    matchLabels:
      app: magedu-nginx-selector
  template:
    metadata:
      labels:
        app: magedu-nginx-selector
    spec:
      containers:
      - name: magedu-nginx-container
        image: harbor.ik8s.cc/magedu/nginx-web1:v1
        #command: ["/apps/tomcat/bin/run_tomcat.sh"]
        #imagePullPolicy: IfNotPresent
        imagePullPolicy: Always
        ports:
        - containerPort: 80
          protocol: TCP
          name: http
        - containerPort: 443
          protocol: TCP
          name: https
        env:
        - name: "password"
          value: "123456"
        - name: "age"
          value: "20"
        resources:
          limits:
            cpu: 500m
            memory: 512Mi
          requests:
            cpu: 500m
            memory: 256Mi

        volumeMounts:
        - name: magedu-images
          mountPath: /usr/local/nginx/html/webapp/images
          readOnly: false
        - name: magedu-static
          mountPath: /usr/local/nginx/html/webapp/static
          readOnly: false
      volumes:
      - name: magedu-images
        nfs:
          server: 192.168.0.42
          path: /data/k8sdata/magedu/images 
      - name: magedu-static
        nfs:
          server: 192.168.0.42
          path: /data/k8sdata/magedu/static
      #nodeSelector:
      #  group: magedu

---
kind: Service
apiVersion: v1
metadata:
  labels:
    app: magedu-nginx-service-label
  name: magedu-nginx-service
  namespace: magedu
spec:
  type: NodePort
  ports:
  - name: http
    port: 80
    protocol: TCP
    targetPort: 80
    nodePort: 30090
  - name: https
    port: 443
    protocol: TCP
    targetPort: 443
    nodePort: 30091
  selector:
    app: magedu-nginx-selector
root@k8s-master01:~/k8s-data/yaml/magedu/nginx# 

6.1、部署nginx业务部署至k8s

root@k8s-master01:~/k8s-data/yaml/magedu/nginx# kubectl apply -f .
deployment.apps/magedu-nginx-deployment created
service/magedu-nginx-service created
root@k8s-master01:~/k8s-data/yaml/magedu/nginx# kubectl get pod -n magedu
NAME                                             READY   STATUS    RESTARTS   AGE
magedu-nginx-deployment-5589bbf4bc-6gd2w         1/1     Running   0          14s
magedu-tomcat-app1-deployment-7754c8549c-c7rtb   1/1     Running   0          8m7s
magedu-tomcat-app1-deployment-7754c8549c-prglk   1/1     Running   0          19m
root@k8s-master01:~/k8s-data/yaml/magedu/nginx# kubectl get svc -n magedu
NAME                         TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)                      AGE
magedu-nginx-service         NodePort    10.100.94.118   <none>        80:30090/TCP,443:30091/TCP   24s
magedu-tomcat-app1-service   ClusterIP   10.100.129.23   <none>        80/TCP                       19m
root@k8s-master01:~/k8s-data/yaml/magedu/nginx# 

6.2、验证nginx 服务是否正常可访问？

能够通过访问k8s集群节点的30090正常访问到nginx，说明nginx服务已经正常部署至k8s环境；

6.3、通过nginx 访问tomcat服务，看看tomcat是否能够被nginx代理？

能够通过nginx访问后端tomcat服务，说明nginx能够正常代理tomcat服务；

7、在负载均衡器上代理nginx服务

root@k8s-ha01:~# cat /etc/haproxy/haproxy.cfg
global
        log /dev/log    local0
        log /dev/log    local1 notice
        chroot /var/lib/haproxy
        stats socket /run/haproxy/admin.sock mode 660 level admin expose-fd listeners
        stats timeout 30s
        user haproxy
        group haproxy
        daemon

        # Default SSL material locations
        ca-base /etc/ssl/certs
        crt-base /etc/ssl/private

        # See: https://ssl-config.mozilla.org/#server=haproxy&server-version=2.0.3&config=intermediate
        ssl-default-bind-ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
        ssl-default-bind-ciphersuites TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
        ssl-default-bind-options ssl-min-ver TLSv1.2 no-tls-tickets

defaults
        log     global
        mode    http
        option  httplog
        option  dontlognull
        timeout connect 5000
        timeout client  50000
        timeout server  50000
        errorfile 400 /etc/haproxy/errors/400.http
        errorfile 403 /etc/haproxy/errors/403.http
        errorfile 408 /etc/haproxy/errors/408.http
        errorfile 500 /etc/haproxy/errors/500.http
        errorfile 502 /etc/haproxy/errors/502.http
        errorfile 503 /etc/haproxy/errors/503.http
        errorfile 504 /etc/haproxy/errors/504.http

listen k8s_apiserver_6443
bind 192.168.0.111:6443
mode tcp
#balance leastconn
server k8s-master01 192.168.0.31:6443 check inter 2000 fall 3 rise 5
server k8s-master02 192.168.0.32:6443 check inter 2000 fall 3 rise 5
server k8s-master03 192.168.0.33:6443 check inter 2000 fall 3 rise 5


listen nginx-svc-80
bind 192.168.0.111:80
mode tcp 
server k8s-node01 192.168.0.34:30090 check inter 2000 fall 3 rise 5
server k8s-node02 192.168.0.35:30090 check inter 2000 fall 3 rise 5
server k8s-node03 192.168.0.36:30090 check inter 2000 fall 3 rise 5
root@k8s-ha01:~# systemctl restart haproxy
root@k8s-ha01:~# 

8、验证通过vip访问nginx服务，看看是否能够正常访问？

9、在存储服务器上上传静态资源，看看nginx是正常读取静态资源？

root@k8s-master01:~/ubuntu/html# scp -rp * 192.168.0.42:/data/k8sdata/magedu/images/
root@192.168.0.42's password: 
1.jpg                                                                                                                                    100%   40KB   8.6MB/s   00:00    
index.html                                                                                                                               100%  277   282.5KB/s   00:00    
root@k8s-master01:~/ubuntu/html# 

验证资源是否正常上传至存储对应目录？

root@harbor:~# ll /data/k8sdata/magedu/images/
total 16
drwxr-xr-x 3 root root 4096 Jun  4 07:56 ./
drwxr-xr-x 4 root root 4096 Jun  4 06:32 ../
drwxr-xr-x 2 root root 4096 May 31 18:37 images/
-rw-r--r-- 1 root root  277 Aug  5  2022 index.html
root@harbor:~# 

访问nginx服务，看看对应资源是否能够被读取？
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