docker-compose

https://docs.docker.com/compose/

两个重要概念：
服务(service): 一个利用的容器，实际上能够蕴含若干运行雷同镜像的容器实例

我的项目(project): 一组关联的利用容器组成的一个残缺业务单元，在docker-compose.yml文件定义

=====pre=====
install docker

vi /etc/sysctl.conf
net.ipv4.ip_forward = 1

=====install=====
curl -L "https://github.com/docker/compose/releases/download/1.28.5/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose
ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
$ docker-compose --version

project haproxy_web
haproxy and three web

tree haproxy_web
<result>
haproxy_web
├── docker-compose.yml
├── haproxy
│ └── haproxy.cfg
└── web

├── Dockerfile├── index.html└── index.py

</result>

mkdir /project_home/haproxy_web
mkdir /project_home/haproxy_web/haproxy
mkdir /project_home/haproxy_web/web

=====web=====
cd /project_home/haproxy_web/web

vi Dockerfile
FROM python:2.7 WORKDIR /code ADD . /code EXPOSE 80 CMD python index.py

touch index.html

vi index.py

!/usr/bin/env python

import sys
import BaseHTTPServer
from SimpleHTTPServer import SimpleHTTPRequestHandler
import socket
import fcntl
import struct
import pickle
from datetime import datetime
from collections import OrderedDict

class HandlerClass(SimpleHTTPRequestHandler):

def get_ip_address(self,ifname):    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)    return socket.inet_ntoa(fcntl.ioctl(        s.fileno(),        0x8915,  # SIOCGIFADDR        struct.pack('256s', ifname[:15])    )[20:24])def log_message(self, format, *args):    if len(args) < 3 or "200" not in args[1]:        return    try:        request = pickle.load(open("pickle_data.txt","r"))    except:        request=OrderedDict()    time_now = datetime.now()    ts = time_now.strftime('%Y-%m-%d %H:%M:%S')    hostname = socket.gethostname()    server = socket.gethostbyname(hostname)    #server = self.get_ip_address('eth0')    host=self.address_string()    addr_pair = (host,server)    if addr_pair not in request:        request[addr_pair]=[1,ts]    else:        num = request[addr_pair][0]+1        del request[addr_pair]        request[addr_pair]=[num,ts]    file=open("index.html", "w")    file.write("<!DOCTYPE html> <html> <body><center><h1><font color=\"blue\" face=\"Georgia, Arial\" size=8><em>HA</em></font> Webpage Visit Results</h1></center>");    for pair in request:        if pair[0] == host:            guest = "LOCAL: "+pair[0]        else:            guest = pair[0]        if (time_now-datetime.strptime(request[pair][1],'%Y-%m-%d %H:%M:%S')).seconds < 3:            file.write("<p style=\"font-size:150%\" >#"+ str(request[pair][1]) +": <font color=\"red\">"+str(request[pair][0])+ "</font> requests " + "from &lt<font color=\"blue\">"+guest+"</font>&gt to WebServer &lt<font color=\"blue\">"+pair[1]+"</font>&gt</p>")        else:            file.write("<p style=\"font-size:150%\" >#"+ str(request[pair][1]) +": <font color=\"maroon\">"+str(request[pair][0])+ "</font> requests " + "from &lt<font color=\"navy\">"+guest+"</font>&gt to WebServer &lt<font color=\"navy\">"+pair[1]+"</font>&gt</p>")    file.write("</body> </html>");    file.close()    pickle.dump(request,open("pickle_data.txt","w"))

if name == '__main__':

try:    ServerClass  = BaseHTTPServer.HTTPServer    Protocol     = "HTTP/1.0"    addr = len(sys.argv) < 2 and "0.0.0.0" or sys.argv[1]    port = len(sys.argv) < 3 and 80 or int(sys.argv[2])    HandlerClass.protocol_version = Protocol    httpd = ServerClass((addr, port), HandlerClass)    sa = httpd.socket.getsockname()    print "Serving HTTP on", sa[0], "port", sa[1], "..."    httpd.serve_forever()except:    exit()

======haproxy======
cd /project_home/haproxy_web/haproxy

vi haproxy.cfg
global

log 127.0.0.1 local0log 127.0.0.1 local1 notice

defaults

log globalmode httpoption dontlognulltimeout connect 5stimeout client 50stimeout server 50s

listen stats

bind *:70stats enablestats uri /

frontend balancer

bind *:80mode httpdefault_backend web_backends

backend web_backends

mode httpoption forwardforbalance roundrobinserver web-1 web-1:80 checkserver web-2 web-2:80 checkserver web-3 web-3:80 checkoption httpchk GET /http-check expect status 200

========project haproxy_web========
cd /project_home/haproxy_web

vi docker-compose.yml
web-1: build: ./web expose:

- 80

web-2:
build: ./web
expose:

- 80

web-3:
build: ./web
expose:

- 80

haproxy:
image: haproxy:1.6
volumes:

- ./haproxy:/haproxy-override- ./haproxy/haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro

links:

- web-1- web-2- web-3

ports:

- "80:80"- "70:70"

=====up stop start====
cd /project_home/haproxy_web

docker-compose up -d

docker-compose stop

docker-compose start

docker ps -a