怎么使用Docker Compose實(shí)現(xiàn)nginx負(fù)載均衡

docker?network?ls  /* network?id?????name?????????driver???????scope b832b168ca9a????bridge????????bridge???????local 373be82d3a6a????composetest_default??bridge???????local a360425082c4????host?????????host????????local 154f600f0e90????none?????????null????????local  */  //?composetest_default?是上一篇介紹compose時(shí)，docker-compose.yml文件所在的目錄名， //?所以，用docker-compose創(chuàng)建的容器會默認(rèn)創(chuàng)建一個(gè)以目錄名為網(wǎng)絡(luò)名的網(wǎng)絡(luò)，并且是dridge（橋接）類型

version:?"3" services: ??web1: ????container_name:?web1 ????image:?"centos:httpd" ????ports: ??????-?"8080:80" ????privileged:?true ????volumes: ??????-?"/app/www/web1/:/var/www/html/" ????command:?['/usr/sbin/init'] ????networks: ??????nginx-lsb: ????????ipv4_address:?192.169.0.3 ??web2: ????container_name:?web2 ????image:?"centos:httpd" ????ports: ??????-?"8081:80" ????privileged:?true ????volumes: ??????-?"/app/www/web2/:/var/www/html/" ????command:?['/usr/sbin/init'] ????networks: ??????nginx-lsb: ????????ipv4_address:?192.169.0.2 networks: ??nginx-lsb: ????driver:?bridge ????ipam: ??????config: ????????-?subnet:?192.169.0.0/16

docker-compose?up?-d

//?可以查看當(dāng)前docker-compose.yml配置的容器組里的容器狀態(tài) docker-compose?ps  docker?network?ls  /* network?id?????name??????????driver???????scope b832b168ca9a????bridge?????????bridge???????local 373be82d3a6a????composetest_default???bridge???????local de6f5b8df1c8????composetest_nginx-lsb??bridge???????local a360425082c4????host??????????host????????local 154f600f0e90????none??????????null????????local */  //?創(chuàng)建了nginx-lsb網(wǎng)絡(luò)，命名是容器組項(xiàng)目的?文件名開頭_網(wǎng)絡(luò)名

docker?network?inspect?composetest_nginx-lsb  //?詳情里面可以看到使用這個(gè)網(wǎng)絡(luò)的每個(gè)容器的ip  如：  /* ... ?"containers":?{ ??????"039aa860ef04f20a7566fdc943fb4398a61d2ad6dd3e373b17c86ac778af89e3":?{ ????????"name":?"web2", ????????"endpointid":?"1bc206661179e65999015f132c2889d3d4365b8d42b8a89cf9c260016fedd5ee", ????????"macaddress":?"02:42:c0:a9:00:02", ????????"ipv4address":?"192.169.0.2/16", ????????"ipv6address":?"" ??????}, ??????"437ad7a07da8e46c0abaf845c4b08425338009fbe972bde69478cf47c75c315b":?{ ????????"name":?"web1", ????????"endpointid":?"5a36e602a5364ee9ad06e9816d09e3966d56ebf06b9394ebc25b8bcee9546607", ????????"macaddress":?"02:42:c0:a9:00:03", ????????"ipv4address":?"192.169.0.3/16", ????????"ipv6address":?"" ??????} ????}, ... */

//?還是在composetest目錄中定義個(gè)?.env文件，用來存放變量 web1_addr=192.169.0.2 web2_addr=192.169.0.3  //?修改docker-compose.yml文件，加入變量定義 version:?"3" services: ??web1: ????container_name:?web1 ????image:?"centos:httpd" ????ports: ??????-?"8080:80" ????privileged:?true ????volumes: ??????-?"/app/www/web1/:/var/www/html/" ????command:?['/usr/sbin/init'] ????networks: ??????nginx-lsb: ????????ipv4_address:?${web1_addr} ??web2: ????container_name:?web2 ????image:?"centos:httpd" ????ports: ??????-?"8081:80" ????privileged:?true ????volumes: ??????-?"/app/www/web2/:/var/www/html/" ????command:?['/usr/sbin/init'] ????networks: ??????nginx-lsb: ????????ipv4_address:?${web2_addr} networks: ??nginx-lsb: ????driver:?bridge ????ipam: ??????config: ????????-?subnet:?192.169.0.0/16

//?重新啟動(dòng)composetest項(xiàng)目 docker-compose?up?-d  //?查看網(wǎng)絡(luò)詳情 docker?network?inspect?composetest_nginx-lsb

//?在.env文件里添加一個(gè)變量?nginx_lsb web1_addr=192.169.0.2 web2_addr=192.169.0.3 nginx_lsb=192.169.0.100  //?修改docker-compose.yml文件，加入變量定義 version:?"3" services: ??nginx-lsb: ????container_name:?nginx-lsb ????image:?"centos:nginx" ????ports:? ??????-?"8000:80" ????privileged:?true ????volumes: ??????-?"/app/nginx/nginx.conf:/etc/nginx/nginx.conf" ????networks: ??????nginx-lsb: ????????ipv4_address:?${nginx_lsb} ??web1: ????container_name:?web1 ????image:?"centos:httpd" ????ports: ??????-?"8080:80" ????privileged:?true ????volumes: ??????-?"/app/www/web1/:/var/www/html/" ????command:?['/usr/sbin/init'] ????networks: ??????nginx-lsb: ????????ipv4_address:?${web1_addr} ??web2: ????container_name:?web2 ????image:?"centos:httpd" ????ports: ??????-?"8081:80" ????privileged:?true ????volumes: ??????-?"/app/www/web2/:/var/www/html/" ????command:?['/usr/sbin/init'] ????networks: ??????nginx-lsb: ????????ipv4_address:?${web2_addr} networks: ??nginx-lsb: ????driver:?bridge ????ipam: ??????config: ????????-?subnet:?192.169.0.0/16  //?重新啟動(dòng)composetest項(xiàng)目 docker-compose?up?-d

upstream?mydocker?{ ??server?192.169.0.2; ??server?192.169.0.3; }  server?{ ??listen?80； ??server_name?mydocker; ??location?/?{ ????proxy_set_header?host?$host; ????proxy_set_header?x-real-ip?$remote_addr; ????proxy_set_header?x-forwarded-for?$proxy_add_x_forwarded_for; ????proxy_buffering?off; ????proxy_pass?http://mydocker; ??} }

docker-composer?restart?nginx-lsb