ServiceCenter 安装

服务中心 ServiceCenter

ServiceCenter是一个服务注册中心。服务提供者可以将自身的实例信息注册到 ServiceCenter，以供服务消费者发现并使用它。

版本发布包启动

下载最新版本的Service-Center
此处使用了 apache-servicecomb-service-center-2.1.0-linux-amd64.tar.gz 包做介绍，实际操作时请根据系统环境从下载页面选取最新版本

启动服务

# 解压tar包
$ tar -zxvf  apache-servicecomb-service-center-2.1.0-linux-amd64.tar.gz
   
# 启动servicecenter服务
$ cd apache-servicecomb-service-center-2.1.0-linux-amd64/
$ ./start-service-center.sh

查看服务状态

# 查看进程状态
$ ps -ef | grep service-center
root     27048     1  2 14:38 pts/2    00:00:00 ./service-center
root     27164 22742  0 14:38 pts/2    00:00:00 grep --color=auto service-center
   
# 查看端口监听
$ netstat -apn | grep :30100
tcp        0      0 127.0.0.1:30100         0.0.0.0:*               LISTEN      27048/service-cente
   
# curl命令调用接口
$ curl http://127.0.0.1:30100
{"_links":{"pb:latest-pact-versions":{"href":"http://127.0.0.1:30100/pacts/latest","title":"Latest pact versions"},"pb:latest-provider-pacts":{"href":"http://127.0.0.1:30100/pacts/provider/{provider}/latest","title":"Latest pacts by provider","templated":true},"pb:latest-provider-pacts-with-tag":{"href":"http://127.0.0.1:30100/pacts/provider/{provider}/latest/{tag}","title":"Latest pacts by provider with a specified tag","templated":true},"pb:pacticipants":{"href":"http://127.0.0.1:30100/participants","title":"Pacticipants"},"pb:publish-pact":{"href":"http://127.0.0.1:30100/pacts/provider/{provider}/consumer/{consumer}/version/{consumerApplicationVersion}","title":"Publish a pact","templated":true},"pb:webhooks":{"href":"http://127.0.0.1:30100/webhooks","title":"Webhooks"},"self":{"href":"http://127.0.0.1:30100/","title":"Index"}},"curies":[{"href":"http://127.0.0.1:30100/doc/{rel}","name":"pb"}]}
   
# 返回如上json串即为启动成功

启动前端页面并查看状态

$ ./start-frontend.sh
$ ps -ef | grep frontend 
root      1875 32096  0 17:43 pts/6    00:00:00 grep --color=auto frontend
root      3020     1  0 Nov05 ?        00:00:23 ./frontend
   
# 查看端口监听
$ netstat -apn | grep :30103
tcp        0      0 127.0.0.1:30103     0.0.0.0:*               LISTEN      3020/frontend

浏览器访问前端页面 http://127.0.0.1:30103，查看服务中心实例（出现以下页面即为成功）

注：
- 若 frontend 服务不是本地启动，则无法通过 http://127.0.0.1:30103 访问；需要修改配置文件中”frontend_host_ip”为主机IP，并使用 http://{ip}:30103 的形式进行访问
- 若 Service-Center 需要对外提供服务，需要修改”httpaddr”，外部应用使用 http://{ip}:30100 进行访问
  如图：

Docker镜像启动

下载并运行镜像

# 下载镜像
$ docker pull servicecomb/service-center
# 启动容器
$ docker run -d -p 30100:30100 servicecomb/service-center

查看镜像状态和监听端口

# 查看端口监听
$ docker ps | grep service-center
0733021cd96d        servicecomb/service-center        "/opt/service-cent..."   3 minutes ago       Up 3 minutes        0.0.0.0:30100->30100/tcp        gallant_varahamihira 

Kubernetes 部署

配置部署脚本

   
$ cat <<EOF >> ./service-center.yaml
apiVersion: v1
kind: Service
metadata:
  name: servicecenter
  namespace: svccomb-system
  labels:
    app: servicecenter
spec:
  ports:
  - port: 30100
    name: http
  selector:
    app: servicecenter
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: servicecenter
  namespace: svccomb-system
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: servicecenter
        version: v1
    spec:
      containers:
      - name: servicecenter
        image: servicecomb/service-center:latest
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 30100 
EOF

Kubernetes中部署

# 创建 namespace "svccomb-system"
$ kubectl create namespace svccomb-system
   
# 部署 service-center
$ kubectl apply -f service-center.yaml

查看Pod状态和service端口

# 查看 pod 启动状态
$ kubectl -n svccomb-system get pod
NAME                             READY   STATUS    RESTARTS   AGE
servicecenter-7d964b7644-h6f4s   1/1     Running   0          72s
   
# 获取 service 监听
$ kubectl -n svccomb-system get service
NAME            TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)     AGE
servicecenter   ClusterIP   10.104.241.163   <none>        30100/TCP   118s
   
$ curl http://10.104.241.163:30100
...