1. Scene description
Due to the use of microservices, regarding the registration center, I discussed with my colleagues on the technical prototype. The preliminary plan is to use: Alibaba's nacos+springcloud gateway. The following table is a comparison of the registration center compiled by my colleagues. Springcloud’s eureka is used as the registration center. Compared with eurka, the main reason for using Ali’s nacos this time is that nacos integrates dynamic loading without restarting the gateway and dynamically loading service configurations.
Registration center comparison:
| Feature | Zookeeper | Eureka | Consul | Etcd | Nacos |
|---|---|---|---|---|---|
| Service health check | (Weak) long connection, keepalive | Can be equipped with support | Service status, memory, hard disk, etc. | Connect heartbeat | Heartbeat/Custom |
| Multiple data centers | — | — | stand by | — | stand by |
| kv storage service | stand by | — | stand by | stand by | stand by |
| consistency | paxos | — | raft | raft | raft |
| CAP theorem | THAT | AP | THAT | CP | AP |
| Use interface (multi-language capability) | Client | http（sidecar） | Support http and dns | http/grpc | dns/http/rpc |
| watch support | stand by | Support long polling/most incremental | Full amount/support long polling | Support long polling | Full amount/support long polling |
| Self-monitoring | — | metrics | metrics | metrics | metrics |
| Safety | acl | — | acl /https | https support (weak) | acl /https |
| Spring Cloud integration | Supported | Supported | Supported | Supported | Supported |
Recommend Nacos>Consul>Etcd>Eureka>Zookeeper
Nacos is the springcloudalibaba family bucket component, suitable for using dubbo as the rpc service access of springcloud.
2. Brief introduction of nacos
Nacos is an open source project of Alibaba. The version released at the beginning of this year has reached the production level, with Chinese and English documents, and the community is very active.
Key features:
Interested children can check it out. Official website address: https://nacos.io/zh-cn/index.html
3. Deployment and description
In the past few days, I went through the official website documents and deployed a basic demo version. Let me introduce it.
3.1 Deployment instructions
Software Pharaoh used 6 virtual machines:
(1) 11 servers, deploy springcloud gateway to provide unified services to the outside world;
(2) The 12 and 13 servers are deployed with nacos, which are mutually registered, can be horizontally expanded, and provide external service registration, configuration registration, etc.;
(3) 14 servers, deployed producer (service provider), deployed two instances;
(4) 15 servers, a consumer (service caller) is deployed, and two instances are deployed;
(5) 16 servers, tested the dynamic configuration, can be ignored;
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3.2 Architecture diagram
3.3 Detailed description of the architecture diagram
3.3.1 nacos registration center and configuration center.
Nacos comes with its own console, access address: http://10.192.168.12:8848/nacos or http://10.192.168.13:8848/nacos
Username: nacos; Password: nacos;
After successful login, as shown below:
There are three main functions:
(1) The list of registration center nodes. The nacos registration center shown here can be expanded horizontally and multiple units can be deployed. Two units are deployed here, namely 12 and 13 servers.
(2) Service management. Three services are started, namely gateway, service provider (2 instances), and service consumer (2 instances).
(3) Configuration management. There are two configurations here. The first is for testing and dynamic acquisition is tested. The second is the configuration file of springcloud gate on the 11 server.
3.3.2 Visit instructions
(1) Gateway access address:
http://10.192.168.11:7000/producer/getpinfo
Note: 10.192.168.11:7000 is the gateway address, producer is the service name of the registration center, and getpinfo is the specific service.
(2) Service provider address:
http://10.192.168.14:7001/getpinfo，http:/10.192.1681.14:7001/getpinfo，
15的服务调用方，就是通过rest调用，跟直接从网关调用一样，软件老王就不啰嗦了。
(3) Nacos address:
http://10.192.168.12:8848/nacos，http:/10.192.1681.13:8848/nacos
3.4 Write at the end
At present, nacos is still in the rapid iteration stage. Both the version and the function are still a bit messy, and there are still some pits to step on. The software king thinks that a red heart is needed to prepare.
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