Docker Swarm + SpringCloud（四）doc

这里在另一台CentOS虚拟机(192.168.30.206)上进行，同样需要配置仓库的地址insecure-registries并且登录 docker login，在这不重复了。

创建docker网络

为了让不同容器间可以进行通讯，我们需要创建一个虚拟网络
docker network create my_network 默认是桥接方式
docker netwokr ls 可以查看已有的网络，包括刚创建的my_network

NETWORK ID          NAME                DRIVER              SCOPE
8af18841665a        bridge              bridge              local
d1e0ccc27f72        docker_gwbridge     bridge              local
b3fbea323302        host                host                local
bb48f115670d        my_network          bridge              local
870a1a30994b        none                null                local

docker inspect my_network 可以查看某个网络的详细配置

[
    {
        "Name": "my_network",
        "Id": "bb48f115670d0dbbb28388023f1f9267d201a026a0f96e272baeeb5155a04a50",
        "Created": "2018-12-20T08:00:12.7584478Z",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": {},
            "Config": [
                {
                    "Subnet": "172.19.0.0/16",
                    "Gateway": "172.19.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {},
        "Options": {},
        "Labels": {}
    }
]

拉取镜像

docker pull 192.168.30.205:5000/discovery:0.0.1-SNAPSHOT
docker images 可以查看镜像列表

REPOSITORY                      TAG                 IMAGE ID            CREATED             SIZE
192.168.30.205:5000/discovery   0.0.1-SNAPSHOT      7f47d9c96ff8        33 minutes ago      129MB

创建并启动容器

docker run -d -p 8761:8761 --name discovery --network my_network 192.168.30.205:5000/discovery:0.0.1-SNAPSHOT
-d 后台启动
-p 指定端口
--name 指定镜像名称 这个名称要跟工程中的defaultZone: http://discovery:8761/eureka/的discovery一致
--network 指定网络

查看进程

docker ps 查看运行中的容器

CONTAINER ID        IMAGE                                          COMMAND                  CREATED             STATUS              PORTS                                            NAMES
6189fd4ad892        192.168.30.206:5000/discovery:0.0.1-SNAPSHOT   "java -jar /discover…"   4 seconds ago       Up 2 seconds        0.0.0.0:8761->8761/tcp                           discovery

docker logs -f discovery 可以查看某个容器的运行日志

编写docker-compose文件

如果每个服务都需要docker pull,docker run 那就太麻烦了，所以我们可以编写一个docker-compose.yml,统一配置。
docker-compose.yml

version: '3'
services:
  discovery:
    image: 192.168.30.205:5000/discovery:0.0.1-SNAPSHOT
    ports:
      - "8761:8761"
    networks:
      - my_network

provider-user:
    image: 192.168.30.205:5000/provider-user:0.0.1-SNAPSHOT
    ports:
      - "8762:8762"
    networks:
      - my_network

provider-order:
    image: 192.168.30.205:5000/provider-order:0.0.1-SNAPSHOT
    ports:
      - "8763:8763"
    networks:
      - my_network

#指定网络
networks:
  my_network:
    ##使用已有的网路
    external:
      name: my_network

docker-compose -f docker-compose.yml up -d 启动后会自动拉取镜像并运行

Pulling discovery (192.168.30.205:5000/discovery:0.0.1-SNAPSHOT)...
0.0.1-SNAPSHOT: Pulling from discovery
4fe2ade4980c: Pull complete
6fc58a8d4ae4: Pull complete
819f4a45746c: Pull complete
b2fcdb18b297: Pull complete
Pulling provider-user (192.168.30.205:5000/provider-user:0.0.1-SNAPSHOT)...
0.0.1-SNAPSHOT: Pulling from provider-user
4fe2ade4980c: Already exists
6fc58a8d4ae4: Already exists
819f4a45746c: Already exists
0900a6bf8880: Pull complete
Pulling provider-order (192.168.30.205:5000/provider-order:0.0.1-SNAPSHOT)...
0.0.1-SNAPSHOT: Pulling from provider-order
cd784148e348: Pull complete
35920a071f91: Pull complete
92e4d568ad31: Pull complete
4bf5a484ac0b: Pull complete
Creating provider-user  ... done
Creating provider-order ... done
Creating discovery      ... done

等待一会，访问 http://192.168.30.206:8761/ 可以看到两个服务已经注册上来，因为启动顺序不确定，所以provider-user和provider-order可能会找不到注册中心，等discovery起来了就好了

• image.png

访问 http://192.168.30.206:8763/orders/users/2 可以看到两个微服务间也能成功调用

• image.png

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