docker 安装consul集群

docker 安装consul集群

consul架构

image.png

拉取镜像

https://hub.docker.com/_/consul/
拉取latest版本镜像

docker pull consul

consul 暴露端口

• DNS: The DNS server (TCP and UDP) ： 8600
• HTTP: The HTTP API (TCP Only) ：8500
• LAN Serf: The Serf LAN port (TCP and UDP) ： 8301
• Wan Serf: The Serf WAN port (TCP and UDP) ： 8302
• server: Server RPC address (TCP Only) ： 8300

docker 启动consul并加入集群

-join 的ip 为第一个docker实例启动后的ip地址

docker run -d -p 8500:8500 -p 8600:8600/tcp -p 8600:8600/udp consul agent -server -ui -node=Server-A -bootstrap-expect=3 -client=0.0.0.0 
docker run -d -p 8501:8500 -p 8601:8600/tcp -p 8601:8600/udp consul agent -server -ui -node=Server-B -bootstrap-expect=3 -client=0.0.0.0 -join=172.12.0.2
docker run -d -p 8502:8500 -p 8602:8600/tcp -p 8602:8600/udp consul agent -server -ui -node=Server-C -bootstrap-expect=3 -client=0.0.0.0 -join=172.12.0.2 

docker 启动consul client节点

docker run -d -p 8503:8500 -p 8603:8600/tcp -p 8603:8600/udp consul agent -ui -node=client -bootstrap-expect=3 -client=0.0.0.0 -join=172.17.0.2

页面查看consul集群

打开页面即可查看consul集群情况：http://localhost:8503/ui/dc1/nodes

dig查看路由信息

dig @127.0.0.1 -p 8603 consul.service.consul

内容如下：

dig @127.0.0.1 -p 8603 consul.service.consul

; <<>> DiG 9.10.6 <<>> @127.0.0.1 -p 8603 consul.service.consul
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44580
;; flags: qr aa rd; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;consul.service.consul.     IN  A

;; ANSWER SECTION:
consul.service.consul.  0   IN  A   172.17.0.3
consul.service.consul.  0   IN  A   172.17.0.2
consul.service.consul.  0   IN  A   172.17.0.4

;; Query time: 7 msec
;; SERVER: 127.0.0.1#8603(127.0.0.1)
;; WHEN: Sat Jan 09 20:53:12 CST 2021
;; MSG SIZE  rcvd: 98