Consul+registrator+consul-template implement dynamic modification of nginx configuration file

Meet your needs

Using Nginx to do load balancing, the manual way is to add or remove the backend server in the upstream, more trouble.

Through Registrator collection needs to register to consul as Nginx backend server information and then register to consul Key/value. Consul-template go to Consul key/value to read the information, and then automatically modify the Nginx configuration file and smooth restart Nginx. No need to modify nginx.conf

Environment

192.168.0.149	Mesos-master	Zookeeper	Consul-server	Consul-template	Nginx
192.168.0.161	Mesos-master	Zookeeper	Marathon
192.168.0.174	Mesos-master	Zookeeper
192.168.0.239	Mesos-salve	Registrator

Steps

Mesosphere and Nginx construction process omitted

Start Consul-server

Docker run-d--name=consul--net=host gliderlabs/consul-server-bootstrap-bind=192.168.0.149

Start Registrator

Note: This startup mode is registered to Consul's Key/value

Docker run-d--name=registrator--net=host--volume=/var/run/docker.sock:/tmp/docker.sock Gliderlabs/registrato R:latest Consulkv://localhost:8500/hello

Installing Consul-template

Wget-c https://releases.hashicorp.com/consul-template/0.12.0/consul-template_0.12.0_linux_amd64.zipunzip-d. Consul-template_0.12.0_linux_amd64.zip CP consul-template/usr/local/bin/.

Configuring nginx.conf Templates

Note:

Consul-template and Nginx must be mounted to a machine because consul-template needs to dynamically modify the Nginx configuration file

Just copy the nginx.conf default configuration here, and then modify the upstream segment.

#vim  /root/nginx_web.ctmpl worker_processes  1;events {    worker _connections  1024;} http {    include       mime.types;     default_type  application/octet-stream;    sendfile         on;    keepalive_timeout  65;        upstream app {     {{range  $key,  $ pairs := tree  "hello/"  | byKey}}{{range  $serverid,  $pair  := $ pairs}}     server {{. value}}; weight=1 {{end}}{{end}}   }   server {         listen       80;         server_name  localhost;               location / {          http://app;       }         }    }}

Start Consul-template

Consul-template-consul 192.168.0.149:8500-template/root/nginx_web.ctmpl:/usr/local/nginx/conf/nginx.conf: "/usr/ Local/nginx/sbin/nginx-s Reload "

Test:

Start an nginx container with marathon, see if Registrator is registered to consul, and see if consul-template automatically adds this backend server to/usr/local/nginx/conf/nginx.conf

This article is from the "Ming Linux blog" blog, be sure to keep this source http://zhaijunming5.blog.51cto.com/10668883/1768321

Consul+registrator+consul-template implement dynamic modification of nginx configuration file