关于docker:dockercompose

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

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 local0
log 127.0.0.1 local1 notice

defaults

log global
mode http
option dontlognull
timeout connect 5s
timeout client 50s
timeout server 50s

listen stats

bind *:70
stats enable
stats uri /

frontend balancer

bind *:80
mode http
default_backend web_backends

backend web_backends

mode http
option forwardfor
balance roundrobin
server web-1 web-1:80 check
server web-2 web-2:80 check
server web-3 web-3:80 check
option 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

!/usr/bin/env python