Docker Nginx容器和Tomcat容器实现负载均衡与动静分离操作

这篇文章主要介绍了Docker Nginx容器和Tomcat容器实现负载均衡与动静分离操作，具有很好的参考价值，希望对大家有所帮助。一起跟随小编过来看看吧

下载Tomcat8镜像

 [root@localhost ~]# docker search tomcat8 NAME                   DESCRIPTION                   STARS        OFFICIAL      AUTOMATED ashince/tomcat8             Tomcat GUI Manager pre-configured docker ima…  5 podbox/tomcat8                                      2                    [OK]

这个tomcat包含了jdk而且启动了可以直接访问，自己启动了8080端口

 [root@localhost ~]# docker pull ashince/tomcat8 Using default tag: latest latest: Pulling from ashince/tomcat8 06b22ddb1913: Pulling fs layer 336c28b408ed: Pull complete 1f3e6b8d80c3: Pull complete [root@localhost ~]# docker images REPOSITORY     TAG         IMAGE ID      CREATED       SIZE nginx        latest       2622e6cca7eb    2 weeks ago     132MB ashince/tomcat8   latest       02aedead27dd    22 months ago    314MB 启动一个Nginx容器和两个Tomcat容器 [root@localhost ~]# docker run -itd -p 8080:8080 ashince/tomcat8 3e3f2aabe67de7ee3f4b6d62176e21aaa9d2302922845cb08ad37af7146b13c5 [root@localhost ~]# docker run -itd -p 8081:8080 ashince/tomcat8 644d59711c805a626b7c1c219aa018f744098a14dd41e54744d6b13e7ba66a2f [root@localhost ~]# docker ps CONTAINER ID    IMAGE        COMMAND         CREATED       STATUS       PORTS          NAMES cca55c4ad919    ashince/tomcat8   "catalina.sh run"    About a minute ago  Up About a minute  0.0.0.0:8081->8080/tcp  unruffled_lalande 08b58d2f41d6    ashince/tomcat8   "catalina.sh run"    7 minutes ago    Up 7 minutes    0.0.0.0:8080->8080/tcp  relaxed_williamson aeebcb0b40a2    nginx        "/docker-entrypoint.…"  2 hours ago     Up 2 hours     0.0.0.0:80->80/tcp    priceless_ardinghelli

 #将Nginx容器当中的配置拷贝到本地修改，因为容器当中没有vi vim命令 [root@localhost ~]# docker cp 68d2bdf336ed:/etc/nginx/conf.d/default.conf . [root@localhost ~]# ls anaconda-ks.cfg default.conf index.html [root@localhost ~]# grep -vE "#|^$" default.conf server { listen    80; listen [::]:80; server_name localhost; location / { root  /usr/share/nginx/html; index index.html index.htm; } error_page  500 502 503 504 /50x.html; location = /50x.html { root  /usr/share/nginx/html; } } #两台tomcat的ip地址 [root@localhost ~]# for i in {72e174adc77d,080068dae40a};do docker inspect $i| grep -i ipaddr |tail -n 1;done "IPAddress": "172.17.0.4", "IPAddress": "172.17.0.3", 拷贝静态资源到Nginx目录下做动静分离 ，同时修改配置文件 #将其中一台Tomcat的ROOT目录拷贝到本地，因为做动静分离Nginx需要访问静态资源要在本地 [root@localhost ~]# docker cp 72e174adc77d:/usr/local/tomcat/webapps/ROOT . #拷贝到Nginx发布目录下面 [root@localhost ~]# docker cp ROOT   68d2bdf336ed:/usr/share/nginx/html/ [root@localhost WEB-INF]# docker exec 68d2bdf336ed ls -l /usr/share/nginx/html/ROOT total 184 -rwxrwxrwx 1 root root 7064 Jun 21 2017 RELEASE-NOTES.txt drwxrwxrwx 2 root root  21 Jul 27 2017 WEB-INF -rwxrwxrwx 1 root root 26447 Jun 21 2017 asf-logo-wide.svg -rwxrwxrwx 1 root root  713 Jun 21 2017 bg-button.png-600 -rwxrwxrwx 1 root root 1918 Jun 21 2017 bg-middle.png-600 -rwxrwxrwx 1 root root 1392 Jun 21 2017 bg-nav-item.png-600 -rwxrwxrwx 1 root root 1401 Jun 21 2017 bg-nav.png-600 -rwxrwxrwx 1 root root 3103 Jun 21 2017 bg-upper.png-600 -rwxrwxrwx 1 root root 21630 Jun 21 2017 favicon.ico -rwxrwxrwx 1 root root 12279 Jun 21 2017 index.jsp -rwxrwxrwx 1 root root 2376 Jun 21 2017 tomcat-power.gif -rwxrwxrwx 1 root root 5581 Jun 21 2017 tomcat.css -rwxrwxrwx 1 root root 2066 Jun 21 2017 tomcat.gif -rwxrwxrwx 1 root root 5103 Jun 21 2017 tomcat.png-600 -rwxrwxrwx 1 root root 67795 Jun 21 2017 tomcat.svg #修改后的Nginx配置文件如下，修改完后拷贝会容器当中 [root@localhost ~]# docker cp default.conf 68d2bdf336ed:/etc/nginx/conf.d/default.conf [root@localhost ~]# docker exec 68d2bdf336ed cat /etc/nginx/conf.d/default.conf upstream tomcat_web{ server 172.17.0.3:8080 weight=100 max_fails=2 fail_timeout=15; server 172.17.0.4:8080 weight=100 max_fails=2 fail_timeout=15; } server { listen    80; listen [::]:80; server_name localhost; error_page  500 502 503 504 /50x.html; root  /usr/share/nginx/html; location /{ proxy_pass http://tomcat_web; proxy_set_header host $host; } location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|flv|mp4|ico)$ { root /usr/share/nginx/html/ROOT; expires 30d; access_log off; } location ~ .*\.(eot|ttf|otf|woff|svg)$ { root /usr/share/nginx/html/ROOT; expires 30d; access_log off; } location ~ .*\.(js|css)$ { root /usr/share/nginx/html/ROOT; expires 30d; access_log off; } location = /50x.html { root  /usr/share/nginx/html; } } #加载新的配置项 [root@localhost ~]# docker exec -it 68d2bdf336ed /bin/bash root@68d2bdf336ed:/# /usr/sbin/nginx -s reload 2020/06/29 07:12:05 [notice] 79#79: signal process started

再去访问Nginx 80端口如图所示：

补充知识：Docker 基础操作容器自启动删除镜像和删除容器

Docker容器自动重启设置

重启reboot操作系统后，发现docker 服务未启动，容器也未启动，怎么才能重启后自动启动呢

1、docker服务自动重启设置

[root@localhost ~]# systemctl enable docker.service

2、docker容器自动启动设置

 [root@localhost ~]# docker images REPOSITORY     TAG         IMAGE ID      CREATED       SIZE nginx        latest       5a3221f0137b    10 months ago    126MB [root@localhost ~]# docker run -itd -p 80:80 nginx 3e28c4b5c6256c0ba04666751e426987d848b7afeb9c59774d5e9831dc78e5ee [root@localhost ~]# docker run -itd -p 81:80 nginx f0597c725fd6b7f4229aa9ab5de4a3cb29d09097a81dc8f64d1a60d469001379 [root@localhost ~]# docker port f0597c725fd6 80/tcp -> 0.0.0.0:81 [root@localhost ~]# docker ps CONTAINER ID    IMAGE        COMMAND         CREATED       STATUS       PORTS        NAMES f0597c725fd6    nginx        "nginx -g 'daemon of??  30 seconds ago   Up 29 seconds    0.0.0.0:81->80/tcp  elastic_allen 3e28c4b5c625    nginx        "nginx -g 'daemon of??  35 seconds ago   Up 33 seconds    0.0.0.0:80->80/tcp  tender_volhard

3、 docker容器自动启动设置

 [root@localhost ~]# docker update --restart=always f0597c725fd6 3e28c4b5c625 f0597c725fd6 3e28c4b5c625 [root@localhost ~]# reboot -h now Connection closed by foreign host. [root@localhost ~]# docker ps CONTAINER ID    IMAGE        COMMAND         CREATED       STATUS       PORTS        NAMES f0597c725fd6    nginx        "nginx -g 'daemon of??  13 minutes ago   Up 2 minutes    0.0.0.0:81->80/tcp  elastic_allen 3e28c4b5c625    nginx        "nginx -g 'daemon of??  13 minutes ago   Up 2 minutes    0.0.0.0:80->80/tcp  tender_volhard

当一个host中镜像和容器较多，需要重置时可选择删除其中部分或全部的镜像和容器。那么你就需要下面的操作了。

1、删除容器

 [root@localhost ~]# docker ps -a CONTAINER ID    IMAGE        COMMAND         CREATED       STATUS       PORTS        NAMES 27c5c4d3cf86    nginx        "nginx -g 'daemon of??  2 minutes ago    Up 2 minutes    0.0.0.0:80->80/tcp  gracious_nash 61cccfe238a8    nginx        "nginx -g 'daemon of??  2 minutes ago    Up 2 minutes    0.0.0.0:81->80/tcp  distracted_grothendieck [root@localhost ~]# docker ps -aq 27c5c4d3cf86 61cccfe238a8

1）首先需要停止所有的容器

 [root@localhost ~]# docker ps -aq f0597c725fd6 3e28c4b5c625 8855c7777f83 466d2efe3dd9 20ca589b1a10 e5457b41cae6 314d1d01c941 [root@localhost ~]# docker stop $(docker ps -aq) f0597c725fd6 3e28c4b5c625 8855c7777f83 466d2efe3dd9 20ca589b1a10 e5457b41cae6 314d1d01c941 [root@localhost ~]# docker ps CONTAINER ID    IMAGE        COMMAND       CREATED       STATUS       PORTS        NAMES

2）删除所有的容器（只删除单个时把后面的变量改为image id即可）

 [root@localhost ~]# docker rm -f $(docker ps -aq) f0597c725fd6 3e28c4b5c625 8855c7777f83 466d2efe3dd9 20ca589b1a10 e5457b41cae6 314d1d01c941 [root@localhost ~]# docker ps -aq [root@localhost ~]#

2、删除镜像

1）查看host中的镜像