Docker实战【镜像部署】

文章目录

- 💥 简介
- 💡 基础-Tomcat镜像部署
- 🎖️ 企业实战-制作Tomcat项目镜像
- 🎯 企业实战-Docker部署SpringBoot项目
- 🚀 问题复盘
- 🍓 总结

💥 简介

由于公司内部机器要做迁移，原系统机器部署在阿里云，要向亚马逊云迁移，由于之前的服务实在windows远程机器部署，并且有些项目因为打包问题，需要远程机器的IDEA做启停控制，本次准备先解决相关打包问题，然后将服务通过镜像方式部署，服务部署后，性能相比之前更快了，下面是相关操作文档。

💡 基础-Tomcat镜像部署

检查本地环境

[root@VM-12-2-opencloudos local]# cat /etc/os-release
NAME="OpenCloudOS"
VERSION="8.6"
ID="opencloudos"
ID_LIKE="rhel fedora"
VERSION_ID="8.6"
PLATFORM_ID="platform:oc8"
PRETTY_NAME="OpenCloudOS 8.6"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:opencloudos:opencloudos:8"
HOME_URL="https://www.opencloudos.org/"
BUG_REPORT_URL="https://bugs.opencloudos.tech/"

检查docker服务状态

[root@VM-12-2-opencloudos local]# systemctl status docker
● docker.service - Docker Application Container EngineLoaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)Active: active (running) since Wed 2023-11-01 21:57:27 CST; 3 weeks 2 days agoDocs: https://docs.docker.comMain PID: 34389 (dockerd)Tasks: 30Memory: 740.3MCGroup: /system.slice/docker.service├─34389 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock├─35838 /usr/bin/docker-proxy -proto tcp -host-ip 0.0.0.0 -host-port 3306 -container-ip 172.17.0.2 -container-port 3306└─35847 /usr/bin/docker-proxy -proto tcp -host-ip :: -host-port 3306 -container-ip 172.17.0.2 -container-port 3306Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.

检查Docker版本

[root@VM-12-2-opencloudos local]# docker version
Client: Docker Engine - CommunityVersion:           24.0.7API version:       1.43Go version:        go1.20.10Git commit:        afdd53bBuilt:             Thu Oct 26 09:09:18 2023OS/Arch:           linux/amd64Context:           defaultServer: Docker Engine - CommunityEngine:Version:          24.0.7API version:      1.43 (minimum version 1.12)Go version:       go1.20.10Git commit:       311b9ffBuilt:            Thu Oct 26 09:08:20 2023OS/Arch:          linux/amd64Experimental:     falsecontainerd:Version:          1.6.24GitCommit:        61f9fd88f79f081d64d6fa3bb1a0dc71ec870523runc:Version:          1.1.9GitCommit:        v1.1.9-0-gccaecfcdocker-init:Version:          0.19.0GitCommit:        de40ad0

搜索Tomcat镜像版本
tomcat版本地址选择: https://javaforall.cn/179038.html
本次使用tomcat:8.5.46-jdk8-openjdk镜像
拉取镜像

[root@VM-12-2-opencloudos local]# docker pull tomcat:8.5.46-jdk8-openjdk
8.5.46-jdk8-openjdk: Pulling from library/tomcat
092586df9206: Pull complete
ef599477fae0: Pull complete
4530c6472b5d: Pull complete
d34d61487075: Pull complete
272f46008219: Pull complete
12ff6ccfe7a6: Pull complete
f26b99e1adb1: Pull complete
21bec9c8ea28: Pull complete
b8a32f28e27c: Pull complete
94fdd0ba0430: Pull complete
Digest: sha256:bb4ceffaf5aa2eba6c3ee0db46d863c8b23b263cb547dec0942e757598fd0c24
Status: Downloaded newer image for tomcat:8.5.46-jdk8-openjdk
docker.io/library/tomcat:8.5.46-jdk8-openjdk

创建容器挂载目录

[root@VM-12-2-opencloudos local]# mkdir -p /data/tomcat/data
[root@VM-12-2-opencloudos local]# chmod -R 777 /data/tomcat/

运行Tomcat容器

[root@VM-12-2-opencloudos local]# docker run -d  --name my_web --restart always -p 8080:8080 -v /data/tomcat/data:/usr/local/tomcat/webapps/ROOT/   tomcat:8.5.46-jdk8-openjdk
5a8bf43b2c1568d0d72477ae4a8846421533b66a5bd946ac27978980efe908f6

查看tomcat运行状态

[root@VM-12-2-opencloudos local]# docker ps
CONTAINER ID   IMAGE                        COMMAND                  CREATED         STATUS         PORTS                                                  NAMES
5a8bf43b2c15   tomcat:8.5.46-jdk8-openjdk   "catalina.sh run"        2 minutes ago   Up 2 minutes   0.0.0.0:8080->8080/tcp, :::8080->8080/tcp              my_web
70c4b01b0631   mysql                        "docker-entrypoint.s…"   3 weeks ago     Up 3 weeks     0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp   mysql

🎖️ 企业实战-制作Tomcat项目镜像

tomcat版本选取

参考地址：https://pythonjishu.com/rvyvovkfpggafry/

tomcat 配置调优
参考地址:
https://blog.csdn.net/z20021111/article/details/126666667 https://blog.csdn.net/vnjohn/article/details/125980391
JDK8版本选取
JDK选用JDK 1.8.0_92

JDK 1.8.0_92是Java Development Kit的最新版本，于2016年12月发布。它是Java SE 8u92的更新版本，包含了许多新的功能和改进，包括：

改进的安全性：Java 8引入了一些安全性改进，包括增强的安全管理器、更强的加密算法、更好的SSL/TLS支持等。
改进的垃圾回收：Java 8引入了一些垃圾回收改进，包括并行垃圾回收、低停顿垃圾回收、更好的内存使用等。
改进的性能：Java 8引入了一些性能改进，包括更快的JIT编译器、更快的字符串操作、更快的数组操作等。
改进的API：Java 8引入了一些新的API，包括Stream API、Optional类、Date/Time API等。
改进的工具：Java 8引入了一些新的工具，包括JavaFX工具箱、Nashorn JavaScript引擎等。

总的来说，Java 8的改进包括安全性、垃圾回收、性能、API和工具等方面。这些改进使得Java 8更加稳定、可靠和高效

上传文件
上传jdk+tomcat的tar.gz文件

-rw-r--r-- 1 root root 181599521 Nov 25 13:33 jdk1.8.0_92.tar.gz
-rw-r--r-- 1 root root  11582260 Nov 25 11:37 tomcat9.tar.gz
[root@VM-12-2-opencloudos tomcat]# pwd
/usr/local/tomcat

编写DockerFile
jvm参数调优项参考：https://blog.csdn.net/hadues/article/details/132018430

# 引入基础centos
FROM centos:7
# 时区
ENV TZ=Asia/Shanghai
#将dk和tomcat加入到容器
ADD jdk1.8.0_92.tar.gz /usr/local/tomcat
ADD tomcat9.tar.gz /usr/local/tomcat
RUN rm -rf /usr/local/tomcat/tomcat9/webapps/*
COPY ROOT.war /usr/local/tomcat/tomcat9/webapps/
#安装vim命令
RUN yum -y install vim
#设置环境
ENV MYPATH /usr/local
ENV JAVA_OPTS="-XX:+HeapDumpOnOutOfMemoryError -Xmx2g -Xms2g -Xmn768m -XX:MetaspaceSize=256m -XX:MaxMetaspaceSize=256m -Xss256k -XX:+UseG1GC -XX:+AlwaysPreTouch -XX:-ResizePLAB -XX:+ParallelRefProcEnabled -XX:+ExplicitGCInvokesConcurrent -XX:MaxGCPauseMillis=200  -XX:ParallelGCThreads=4 -XX:ConcGCThreads=2"
#设置工作目录
WORKDIR $MYPATH
#设置JAVA_HOME 环境变量，后边版本对应上方安装包
ENV JAVA_HOME /usr/local/tomcat/jdk1.8.0_92
#设置CLASSPATH 环境变量
ENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
#设置CATALINA_HOME 环境变量
ENV CATALINA_HOME /usr/local/tomcat/tomcat9
#设置CATALINA_BASE 环境变量
ENV CATALINA_BASE /usr/local/tomcat/tomcat9
#设置PATH
ENV PATH $PATH:$JAVA_HOME/bin:$CATALINA_HOME/lib:$CATALINA_HOME/bin
#指定容器启动后执行的命令
# 初始化文件上传目录
RUN mkdir /usr/local/zhixiao
RUN mkdir /usr/local/zhixiao/file
RUN chmod a+rwx /usr/local/zhixiao/
VOLUME [ "/usr/usr/local/zhixiao/file/",  "/usr/local/tomcat/tomcat9/webapps/"]
# 指定容器启动时执行的脚本
ENTRYPOINT [ "/usr/local/tomcat/tomcat9/bin/catalina.sh", "run" ]
# EXPOSE 映射端口
EXPOSE 8080

构建Docker镜像

docker build -t zxht:1.0 .

启动镜像

docker run -d --name zxht -p 8080:8080  zxht:1.0

查看启动结果

进入容器

docker exec -it 3e703eea724e /bin/bash
cd /usr/local/tomcat/tomcat9/logs
tail -f -n 1000  catalina.2023-11-25.log

可以看到配置的JVM参数生效了，同时项目启动成功，访问服务成功！

25-Nov-2023 07:16:47.710 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.config.file=/usr/local/tomcat/tomcat9/conf/logging.properties
25-Nov-2023 07:16:47.710 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
25-Nov-2023 07:16:47.710 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -XX:+HeapDumpOnOutOfMemoryError
25-Nov-2023 07:16:47.710 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Xmx2g
25-Nov-2023 07:16:47.710 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Xms2g
25-Nov-2023 07:16:47.710 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Xmn768m
25-Nov-2023 07:16:47.711 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -XX:MetaspaceSize=256m
25-Nov-2023 07:16:47.711 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -XX:MaxMetaspaceSize=256m
25-Nov-2023 07:16:47.711 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Xss256k
25-Nov-2023 07:16:47.711 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -XX:+UseG1GC
25-Nov-2023 07:16:47.711 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -XX:+AlwaysPreTouch
25-Nov-2023 07:16:47.711 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -XX:-ResizePLAB
25-Nov-2023 07:16:47.711 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -XX:+ParallelRefProcEnabled
25-Nov-2023 07:16:47.711 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -XX:+ExplicitGCInvokesConcurrent
25-Nov-2023 07:16:47.711 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -XX:MaxGCPauseMillis=200
25-Nov-2023 07:16:47.712 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -XX:ParallelGCThreads=4
25-Nov-2023 07:16:47.712 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -XX:ConcGCThreads=2
25-Nov-2023 07:16:47.712 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djdk.tls.ephemeralDHKeySize=2048
25-Nov-2023 07:16:47.712 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.protocol.handler.pkgs=org.apache.catalina.webresources
25-Nov-2023 07:16:47.712 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dorg.apache.catalina.security.SecurityListener.UMASK=0027
25-Nov-2023 07:16:47.712 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dignore.endorsed.dirs=
25-Nov-2023 07:16:47.712 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.base=/usr/local/tomcat/tomcat9
25-Nov-2023 07:16:47.712 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.home=/usr/local/tomcat/tomcat9
25-Nov-2023 07:16:47.712 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.io.tmpdir=/usr/local/tomcat/tomcat9/temp
25-Nov-2023 07:16:47.714 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent The Apache Tomcat Native library which allows using OpenSSL was not found on the java.library.path: [/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib]
25-Nov-2023 07:16:48.044 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["http-nio2-8080"]
25-Nov-2023 07:16:48.099 INFO [main] org.apache.catalina.startup.Catalina.load Server initialization in [585] milliseconds
25-Nov-2023 07:16:48.125 INFO [main] org.apache.catalina.core.StandardService.startInternal Starting service [Catalina]
25-Nov-2023 07:16:48.125 INFO [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet engine: [Apache Tomcat/9.0.64]
25-Nov-2023 07:16:48.145 INFO [main] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive [/usr/local/tomcat/tomcat9/webapps/ROOT.war]
25-Nov-2023 07:16:55.093 INFO [main] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
25-Nov-2023 07:17:03.556 INFO [main] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive [/usr/local/tomcat/tomcat9/webapps/ROOT.war] has finished in [15,411] ms
25-Nov-2023 07:17:03.559 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-nio2-8080"]
25-Nov-2023 07:17:03.562 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in [15462] milliseconds

退出容器

ctrl+D

🎯 企业实战-Docker部署SpringBoot项目

DockerFile文件编写

FROM centos:7
#将dk加入到容器
ADD jdk1.8.0_92.tar.gz /usr/local/jdk
# 声明工作目录
WORKDIR /opt
RUN mkdir -p /opt
#设置JAVA_HOME 环境变量，后边版本对应上方安装包
ENV JAVA_HOME /usr/local/jdk/jdk1.8.0_92
#设置CLASSPATH 环境变量
ENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
#设置PATH
ENV PATH $PATH:$JAVA_HOME/bin
# VOLUME 指定了临时文件目录为/tmp。
# 其效果是在主机 /var/lib/docker 目录下创建了一个临时文件，并链接到容器的/tmp
VOLUME /tmp
# 传包
COPY *.jar /opt/app.jar
EXPOSE 8080
# JVM启动参数设置
ENV JAVA_OPTS="\
-server \
-Xss256k \
-XX:MaxMetaspaceSize=256m \
-XX:+UseG1GC \
-XX:+AlwaysPreTouch \
-XX:-ResizePLAB \
-XX:+ParallelRefProcEnabled \
-XX:+ExplicitGCInvokesConcurrent \
-XX:MaxGCPauseMillis=200 \
-XX:ParallelGCThreads=4 \
-XX:ConcGCThreads=2 \
-Xmn768m \
-Xmx2g \
-Xms2g \
-XX:+PrintGCDetails \
-XX:+PrintTenuringDistribution \
-XX:+PrintGCTimeStamps \
-XX:+HeapDumpOnOutOfMemoryError \
-XX:HeapDumpPath=/opt \
-XX:+UseGCLogFileRotation \
-XX:NumberOfGCLogFiles=5 \
-XX:GCLogFileSize=20M"
ENTRYPOINT java ${JAVA_OPTS} -jar /opt/app.jar

-XX:+HeapDumpOnOutOfMemoryError 是指OOM时，自动生成dump文件。

倒数第二行的RUN命令，创建start.sh及授权，这里是为解决容器启动运行后，java应用进程号等于1的问题，进程号等于1会导致jstack等命令无法运行。

构建镜像
[root@VM-12-2-opencloudos tomcat]# docker build -t pc:1.0 .

启动镜像

docker run -d -p 8080:8080 --name pc pc:1.0

🚀 问题复盘

1、only whitespace content allowed before start tag and not ^ (position: START_DOCUMENT seen ^… @1:1)
重新删除问题jar包所在目录文件，重新刷新mvn下载文件即可
2、Groovy和java并存的web项目，打包失败
参考地址: https://blog.csdn.net/zzfengxia/article/details/81978714