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Docker 从入门到精通之Docker搭建Nginx集群

977人浏览   2023-10-23 15:01:08

nginx集群

准备3台服务，创建3个nginx服务，搭建基于swarm的nginx服务集群

$ docker service create \
  --name my-web \
  -p 8080:80 \
  --replicas 3 \
  nginx:latest
 
pym6z9yfx25n49fkh6z0mw4xu
overall progress: 3 out of 3 tasks 
1/3: running   
2/3: running   
3/3: running   
verify: Service converged

查看服务

$ docker service ls
ID             NAME      MODE         REPLICAS   IMAGE          PORTS
pym6z9yfx25n   my-web    replicated   3/3        nginx:latest   *:8080->80/tcp

scale service

$ docker service scale my-web=2

配置负载均衡，此处用haproxy，也可以用consule做服务发现

在101这台服务器安装haproxy

$ mkdir /haproxy/haproxy.cfg

$ docker run -d  -p 80:80 -v /haproxy:/usr/local/etc/haproxy --name haproxy haproxy

修改haproxy.cfg

global
        log /dev/log    local0
        log /dev/log    local1 notice


# Configure HAProxy to listen on port 80
frontend http_front
   bind *:80
   stats uri /haproxy?stats
   default_backend http_back

# Configure HAProxy to route requests to swarm nodes on port 8080
backend http_back
   balance roundrobin
   server node1 192.168.56.101:8080 check
   server node2 192.168.56.106:8080 check
   server node3 192.168.56.107:8080 check

访问http://192.168.56.101会轮询访问三个nginx服务

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