Docker Nginx containers and Tomcat containers implement load balancing and static separation operations

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

[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 Start one Nginx container and two Tomcat containers [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 sh run" About a minute ago Up About a minute 0.0.0.0:8081->8080/tcp unruffled_lalande 08b58d2f41d6. 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. 2 hours ago up 2 hours 0.0.0.0:80->80/ TCP Priceless_ardinghelli

# Copy the configuration in the Nginx container to local modification, Because the container not vi vim command/root @ localhost ~ # docker cp 68 d2bdf336ed: / 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; }} # the IP address of the two tomcat/root @ localhost ~ # for the I in {72 e174adc77d, 080068 dae40a}; do docker inspect $i| grep -i ipaddr |tail -n 1; done "IPAddress": "172.17.0.4", "IPAddress": 172.17.0.3, copy static resources to the Nginx directory for separation, and modify the configuration file # to copy the ROOT directory of one Tomcat to a local directory. Because of dynamic and static separation Nginx need access to a static resource to the local/root @ localhost ~ # docker cp 72 e174adc77d: / usr/local/tomcat/webapps/root. # copy to Nginx released under the directory [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 -rwxrwxrwx 1 root root 1918 Jun 21 2017 bg-middle.png -rwxrwxrwx 1 root root 1392 Jun 21 2017 bg-nav-item.png -rwxrwxrwx 1 root root 1401 Jun 21 2017 bg-nav.png -rwxrwxrwx 1 root root 3103 Jun 21 2017 bg-upper.png -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 -rwxrwxrwx 1 root root 67795 Jun 21 2017 tomcat.svg # The modified Nginx configuration file is as follows: After the modification will copy the container/root @ localhost ~ # docker cp default. Conf 68 d2bdf336ed: / etc/nginx/conf. D/default. The conf/root @ localhost ~ # Docker exec 68 d2bdf336ed 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; # Load new configuration item [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

[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?? 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. 35 seconds ago up 33 seconds 0.0.0.0:80->80/ TCP tender_volhard

[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

[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 0.0.0.0:80->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. 2 minutes ago up 2 minutes 0.0.0.0:81->80/ TCP distracted_grothendieck [root@localhost ~]# docker ps-aq 27c5c4d3CF86 61cccfe238a8

[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
 

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