Use Docker to build consul cluster +registrator for automatic service registration.

Preparatory work:
10.173.16.83 Master
10.172.178.76 Node1
10.171.19.139 Node2
10.162.204.252 Node3

First, install the Consul-cluster
Master
Docker run-d-H master-v/mnt:/data \
-P 10.173.16.83:8300:8300 \
-P 10.173.16.83:8301:8301 \
-P 10.173.16.83:8301:8301/UDP \
-P 10.173.16.83:8302:8302 \
-P 10.173.16.83:8302:8302/UDP \
-P 10.173.16.83:8400:8400 \
-P 8,500:8,500 \
Progrium/consul-server-advertise 10.173.16.83-bootstrap-expect 3

Node1:
Docker run-d-H node1-v/mnt:/data \
-P 10.172.178.76:8300:8300 \
-P 10.172.178.76:8301:8301 \
-P 10.172.178.76:8301:8301/UDP \
-P 10.172.178.76:8302:8302 \
-P 10.172.178.76:8302:8302/UDP \
-P 10.172.178.76:8400:8400 \
-P 8,500:8,500 \
Progrium/consul-server-advertise 10.172.178.76-join 10.173.16.83

Node2:
Docker run-d-H node2-v/mnt:/data \
-P 10.171.19.139:8300:8300 \
-P 10.171.19.139:8301:8301 \
-P 10.171.19.139:8301:8301/UDP \
-P 10.171.19.139:8302:8302 \
-P 10.171.19.139:8302:8302/UDP \
-P 10.171.19.139:8400:8400 \
-P 8,500:8,500 \
Progrium/consul-server-advertise 10.171.19.139-join 10.173.16.83

Second, installation consul-client
NODE3:
Docker run-d-H node3-v/mnt:/data \
-P 10.162.204.252:8300:8300 \
-P 10.162.204.252:8301:8301 \
-P 10.162.204.252:8301:8301/UDP \
-P 10.162.204.252:8302:8302 \
-P 10.162.204.252:8302:8302/UDP \
-P 10.162.204.252:8400:8400 \
-P 8,500:8,500 \
Progrium/consul-advertise 10.162.204.252-join 10.173.16.83

Third, installation Regitrator
Master
Docker run-d \
-v/var/run/docker.sock:/tmp/docker.sock \
--name registrator-h registrator \
Gliderlabs/registrator:latest consul://10.173.16.83:8500

Node1:
Docker run-d \
-v/var/run/docker.sock:/tmp/docker.sock \
--name registrator-h registrator \
Gliderlabs/registrator:latest consul://10.172.178.76:8500

Node2:
Docker run-d \
-v/var/run/docker.sock:/tmp/docker.sock \
--name registrator-h registrator \
Gliderlabs/registrator:latest consul://10.171.19.139:8500

NODE3:
Docker run-d \
-v/var/run/docker.sock:/tmp/docker.sock \
--name registrator-h registrator \
Gliderlabs/registrator:latest consul://10.162.204.252:8500

Four, simple test.
1. Start the Python-micro-service container. (Start multiple, on a machine or multiple machines)
Docker run-d-P--name node1-h Node1 jlordiales/python-micro-service:latest

2. Define the template file and view the results.
[Email protected] ~]# Cat/tmp/consul.ctmpl
{{Range service ' Python-micro-service '}}\nserver {.} address}}:{{. Port}}{{end}}
[Email protected] ~]# Consul-template-consul master:8500-template/tmp/consul.ctmpl:/tmp/consul.result-dry-once

Five, test installation Nginx
1. Download and install Consul-template
wget Https://releases.hashicorp.com/consul-template/0.7.0/consul-template_0.7.0_linux_amd64.zip
Unzip consul-template_0.7.0_linux_amd64.zip-d/usr/bin/

2. View Nginx's dockerfile and related files.
[Email protected] nginx]# pwd
/root/nginx
[[email protected] nginx]# ls
Consul-template Dockerfile start.sh
[email protected] nginx]# cat Dockerfile
From Nginx:latest

entrypoint ["/bin/start.sh"]
EXPOSE 80
Volume/templates
ENV Consul_url consul:8500

ADD start.sh/bin/start.sh
RUN rm-v/etc/nginx/conf.d/*
ADD consul-template/usr/local/bin/
#RUN chmod +x/usr/local/bin/consul-template && chmod +x/bin/start.sh

[email protected] nginx]# cat start.sh
#!/bin/bash
Service Nginx Start
consul-template-consul= $CONSUL _url-template= "/templates/service.ctmpl:/etc/nginx/conf.d/service.conf:service Nginx Reload "

3. Define template files and result files
[Email protected] ~]# Cat/tmp/service.ctmpl
Upstream Python-service {
Least_conn;
{{Range service ' Python-micro-service '}}server {.} address}}:{{. Port}} max_fails=3 fail_timeout=60 weight=1;
{{Else}}server 127.0.0.1:65535; # Force a 502 {{end}}
}

server {
Listen default_server;
CharSet Utf-8;

Location/{
Proxy_pass Http://python-service;
Proxy_set_header x-forwarded-for $proxy _add_x_forwarded_for;
Proxy_set_header Host $host;
Proxy_set_header X-real-ip $remote _addr;
}
}

4. Build the Nginx image and start it.
Docker build-t Nginx.
Docker run-p 8080:80-d--name nginx--volume/tmp/service.ctmpl:/templates/service.ctmpl--link consul:consul nginx

5. View the template results.
Enter the Nginx container to view the contents of the configuration file.

Reference Documentation:
1.https://jlordiales.me/2015/04/01/consul-template/
2.https://jlordiales.me/2015/02/03/registrator/#advertise
3.https://jlordiales.me/2015/01/23/docker-consul/

Use Docker to build consul cluster +registrator for automatic service registration.