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The following brings you how Docker Swarm should centralize the deployment of Traefik load balancer, hoping to give you some help in practical application. Load balancing involves more things, there are not many theories, and there are many books on the Internet. Today, we will use the accumulated experience in the industry to do an answer.

First, create a single-node Docker Swarm cluster

Docker swarm init

Create a network in the Swarm cluster

Docker network create-driver=overlay traefik-attachable

Deploy the traefik load balancer service in the Swarm cluster

Docker service create\

-- name traefik\

-- constraint=node.role==manager\

-- publish 80:80-- publish 8080RV 8080\

-- mount type=bind,source=/var/run/docker.sock,target=/var/run/docker.sock\

-- network traefik\

Traefik\

-- docker\

-- docker.swarmmode\

-- docker.domain=traefik\

-- docker.watch\

-- web

4. Deploy two container services (httpd and nginx) in the Swarm cluster

# 2.1 httpd.abc.com

Docker service create\

-- name httpd\

-- network traefik\

-label "traefik.backend=httpd"\

-label "traefik.enable=true"\

-label "traefik.protocol=http"\

-label "traefik.port=80"\

-label "traefik.frontend.rule=Host:httpd.abc.com"\

Httpd

# 2.2 nginx.abc.com

Docker service create\

-- name nginx\

-- network traefik\

-label "traefik.backend=nginx"\

-label "traefik.enable=true"\

-label "traefik.protocol=http"\

-label "traefik.port=80"\

-label "traefik.frontend.rule=Host:nginx.abc.com"\

Nginx

5. Visit 2 websites and view Traefik UI through domain name in browser

# modify the hosts file C:\ Windows\ System32\ drivers\ etc\ hosts of the Win7 client computer

# add 2 host records:

Httpd.abc.com 192.168.3.168

Nginx.abc.com 192.168.3.168

Http://192.168.3.168:8080

Http://httpd.abc.com

Http://nginx.abc.com

6. Check Traefik UI after the service capacity in the Swarm cluster is expanded.

Docker service scale httpd=2

Docker service scale nginx=3

Http://192.168.3.168:8080

Attached picture:

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