1. Consul Server

創建consul server虛擬主機

docker-machine create consul

出現如下內容即創建成功

Running pre-create checks...
Creating machine...
(consul) Copying /Users/enoch/.docker/machine/cache/boot2docker.iso to /Users/enoch/.docker/machine/machines/consul/boot2docker.iso...
(consul) Creating VirtualBox VM...
(consul) Creating SSH key...
(consul) Starting the VM...
(consul) Check network to re-create if needed...
(consul) Waiting for an IP...
Waiting for machine to be running, this may take a few minutes...
Detecting operating system of created instance...
Waiting for SSH to be available...
Detecting the provisioner...
Provisioning with boot2docker...
Copying certs to the local machine directory...
Copying certs to the remote machine...
Setting Docker configuration on the remote daemon...
Checking connection to Docker...
Docker is up and running!
To see how to connect your Docker Client to the Docker Engine running on this virtual machine, run: docker-machine env consul

創建工作目錄consul

mkdir -p ~/workspace/consul && cd ~/workspace/consul

創建docker-compose.yml

version: "3"

services:
  consul:
    image: consul:latest
    ports:
      - 8500:8500
    command: agent -server -bootstrap -ui -client=0.0.0.0 -node=server01

切換環境到consul

eval $(docker-machine env consul)

執行docker-compose.yml

docker-compose up -d

查看虛擬主機IP

docker-machine ip consul
# output 192.168.99.103

通過IP在瀏覽器訪問8500端口，即可看到Consul的UI界面

2. Nginx + Consul Template

創建反向代理虛擬主機

docker-machine create reverseproxy

出現以下內容代表創建成功

Running pre-create checks...
Creating machine...
(reverseproxy) Copying /Users/enoch/.docker/machine/cache/boot2docker.iso to /Users/enoch/.docker/machine/machines/reverseproxy/boot2docker.iso...
(reverseproxy) Creating VirtualBox VM...
(reverseproxy) Creating SSH key...
(reverseproxy) Starting the VM...
(reverseproxy) Check network to re-create if needed...
(reverseproxy) Waiting for an IP...
Waiting for machine to be running, this may take a few minutes...
Detecting operating system of created instance...
Waiting for SSH to be available...
Detecting the provisioner...
Provisioning with boot2docker...
Copying certs to the local machine directory...
Copying certs to the remote machine...
Setting Docker configuration on the remote daemon...
Checking connection to Docker...
Docker is up and running!
To see how to connect your Docker Client to the Docker Engine running on this virtual machine, run: docker-machine env reverseproxy

切換當前環境到虛擬主機

eval $(docker-machine env reverseproxy)

創建工作目錄reverseproxy

mkdir -p ~/workspace/reverseproxy && cd ~/workspace/reverseproxy

創建docker-compose.yml

version: "3"

services:
  nginx:
    image: nginx:latest
    ports:
      - 8081:80
    volumes:
      - ./nginx.conf:/etc/nginx/nginx.conf
      - ./conf.d:/etc/nginx/conf.d

  consul-template:
    image: hashicorp/consul-template:alpine
    volumes:
      - ./conf.d:/etc/nginx/conf.d
    command: consul-template --consul-addr 192.168.99.103:8500 --template "/etc/nginx/conf.d/nginx.ctmpl:/etc/nginx/conf.d/vhost.conf" --log-level=info

把容器跑起來

docker-compose up -d

查看IP

docker-machine ip reverseproxy
# output 192.168.99.102

瀏覽器訪問reverseproxy的8081端口，出現如下內容代表啟動成功

3. Webserver搭建

創建虛擬主機webserver1

docker-machine create webserver1
eval $(docker-machine env webserver1)
mkdir webserver1 & cd webserver1

創建docker—compose.yml

version: "3"

services:

  nginx1:
    image: nginx:latest
    ports:
      - 81:80

  nginx2:
    image: nginx:latest
    ports:
      - 82:80

  registrator:
    image: shaharil/registrator:latest
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock
    command: consul://192.168.99.103:8500

跑起來

docker-compose up -d

打開reverseproxy/conf.d/vhost.conf可以看到webserver啟動的nginxIP地址都被加了進去

upstream http_backend {
    
    server 172.18.0.2:81;
    
    server 172.18.0.3:82;
    
}

server {
    listen 8000;
    server_name localhost;
    location / {
        proxy_pass http://http_backend;
    }
}

做個試驗，現在將其中一臺nginx容器關閉

eval $(docker-machine env webserver1)
docker stop webserver1_nginx2_1

此時可以看到vhost.conf中的IP被去掉了

upstream http_backend {
    
    server 172.18.0.2:81;
    
}

server {
    listen 8000;
    server_name localhost;
    location / {
        proxy_pass http://http_backend;
    }
}

再將nginx容器打開，該容器的IP地址隨之也會被加進去

docker start webserver1_nginx2_1

//以下是文件內容
upstream http_backend {
    
    server 172.18.0.2:81;
    
}

server {
    listen 8000;
    server_name localhost;
    location / {
        proxy_pass http://http_backend;
    }
}