docker nginx 重新載入配置檔案_使用Docker Compose 實現nginx負載均衡
阿新 • • 發佈:2021-02-11
以Docker的網路管理,容器的IP設定為基礎知識實現Nginx負載均衡
檢視所有docker網路
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,docker-compose.yml檔案所在的目錄名, // 所以,用docker-compose建立的容器會預設建立一個以目錄名為網路名的網路,並且是dridge(橋接)型別
指定容器IP地址
官網文件地址:https://docs.docker.com/compo...
繼續上一篇《使用Docker Compose容器編排工具》文章中的docker-compose.yml
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
使用docker-compose啟動容器
docker-compose up -d
檢視容器是否啟動,並確認是否建立了網路 nginx-lsb
// 可以檢視當前docker-compose.yml配置的容器組裡的容器狀態 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 */ // 建立了nginx-lsb網路,命名是容器組專案的 檔名開頭_網路名
檢視網路 nginx-lsb的詳情
docker network inspect composetest_nginx-lsb
// 詳情裡面可以看到使用這個網路的每個容器的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": ""
}
},
...
*/
使用 env_file環境檔案:
簡單可以理解為:在docker-compose.yml中定義變數,引用在外部.env檔案中進行變數定義
官方文件地址:https://docs.docker.com/compo...
// 還是在composetest目錄中定義個 .env檔案,用來存放變數
web1_addr=192.169.0.2
web2_addr=192.169.0.3
// 修改docker-compose.yml檔案,加入變數定義
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composetest專案,並檢視網路詳情,確認容器ip是否設定成功
// 重新啟動composetest專案
docker-compose up -d
// 檢視網路詳情
docker network inspect composetest_nginx-lsb
在composetest專案中新增一臺nginx伺服器作為負載均衡伺服器
// 在.env檔案裡新增一個變數 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檔案,加入變數定義
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composetest專案
docker-compose up -d
修改nginx.conf配置檔案,配置負載均衡
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;
}
}
重新啟動nginx-lsb,載入配置檔案
docker-composer restart nginx-lsb
訪問 http://伺服器IP地址:8000,測試伺服器負載均衡!
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