Docker高级教程之智能添加与修改防火墙规则

[root@docker-test3 firewall]# cat /root/firewall/iptables_base.txt
*filter
:INPUT DROP [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [1:83]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -i em1 -j ACCEPT
-A INPUT -i ovs1 -j ACCEPT
#forllow is room network
-A INPUT -s 117.121.x.0/24 -p tcp -m multiport --dports 50020 -j ACCEPT
-A INPUT -p tcp -j REJECT --reject-with tcp-reset
-A FORWARD -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK RST -m limit --limit 1/sec -j ACCEPT
COMMIT
# Completed on Fri Dec 6 10:59:13 2013
*nat
:PREROUTING ACCEPT [2:269]
:POSTROUTING ACCEPT [1739:127286]
:OUTPUT ACCEPT [1739:127286]
:DOCKER - [0:0]
-A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER
-A POSTROUTING -s 172.16.0.0/16 ! -d 172.16.0.0/16 -j MASQUERADE
-A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER
COMMIT

#!/usr/bin/env python
#-*- coding: utf-8 -*-
#author:Deng Lei
#email: dl528888@gmail.com
import os
import sys
import argparse
import etcd
import time
import socket, struct, fcntl
from docker import Client
import subprocess
import shutil
import nmap
def get_local_ip(iface = 'em1'):
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sockfd = sock.fileno()
SIOCGIFADDR = 0x8915
ifreq = struct.pack('16sH14s', iface, socket.AF_INET, 'x00'*14)
try:
res = fcntl.ioctl(sockfd, SIOCGIFADDR, ifreq)
except:
return None
ip = struct.unpack('16sH2x4s8x', res)[2]
return socket.inet_ntoa(ip)
def docker_container_all():
docker_container=docker_client.containers(all=True)
container_name=[]
container_stop_name=[]
for i in docker_container:
container_name.append(i['Names'])
for b in container_name:
for c in b:
container_stop_name.append(c)
return container_stop_name
def docker_container_run():
docker_container=docker_client.containers()
container_name=[]
container_stop_name=[]
for i in docker_container:
container_name.append(i['Names'])
for b in container_name:
for c in b:
container_stop_name.append(c[1::])
return container_stop_name
if __name__ == "__main__":
#follow is help info
p = argparse.ArgumentParser(description='It is userful tool to modify docker container firewall')
p.add_argument("container_name",help="list local docker container name")
p.add_argument("-l","--list",help="show container firewall rules",action="store_true")
p.add_argument("-a","--add",help="add container firewall rules",action="store_true")
p.add_argument("-r","--rm",help="rm container firewall rules")
p.add_argument("-m","--mode",choices=["internal","external"],help="set container firewall mode")
p.add_argument("-s","--source",help="source ip view container firewall rules")
p.add_argument("-sp","--sport",help="source port view container firewall rules")
p.add_argument("-d","--dest",help="destination ip container firewall rules")
p.add_argument("-dp","--dport",help="destination port view container firewall rules")
p.add_argument("-pm","--portmode",choices=["dynamic","manual"],help="set container port mode")
p.add_argument("-e","--effect",help="effect container firewall rules",action="store_true")
p.add_argument("-ap","--addip",help="add external ip to container")
p.add_argument("-rp","--rmip",help="rm external ip to container")
args = p.parse_args()
local_ip=get_local_ip('ovs1')
docker_etcd_key='/app/docker/'
etcd_client=etcd.Client(host='127.0.0.1', port=4001)
docker_client = Client(base_url='unix://var/run/docker.sock', version='1.15', timeout=10)
docker_container_all_name=docker_container_all()
portmode='manual'
container_ip=''
#get container ip
r = etcd_client.read('%s%s'%(docker_etcd_key,local_ip), recursive=True, sorted=True)
for child in r.children:
if child.dir is not True and args.container_name in child.key and 'firewall' not in child.key:
container_ip=eval(child.value)['Container_ip']
if len(container_ip) == 0 and args.container_name != "all":
print 'This container:%s info is not in etcd!'%args.container_name
sys.exit(1)
if '/'+args.container_name not in docker_container_all_name and args.container_name != "all":
print 'local host docker is not container:%s!'%args.container_name
sys.exit(1)
if args.list:
try:
now_firewall_rule=etcd_client.read('%s%s/firewall/nat-%s'%(docker_etcd_key,local_ip,args.container_name)).value
except KeyError:
print 'This container:%s is not firewall rule!'%args.container_name
sys.exit(1)
if len(now_firewall_rule) >0:
now_firewall_rule=eval(now_firewall_rule)
print 'Follow is container:%s firewall rule!'%args.container_name
for i in now_firewall_rule:
print i
else:
print 'This container:%s is not firewall rule!'%args.container_name
sys.exit(1)
if args.portmode=="dynamic":
try:
now_port=etcd_client.read('%s%s/firewall/now_port'%(docker_etcd_key,local_ip)).value
except KeyError:
now_port='40000'
now_port=int(now_port) + 1
key='%s%s/firewall/now_port'%(docker_etcd_key,local_ip)
etcd_client.write(key,now_port)
portmode=args.portmode
elif args.portmode=="manual":
if len(args.sport)>0:
now_port=args.sport
else:
print 'no input source port'
key='%s%s/firewall/now_port'%(docker_etcd_key,local_ip)
etcd_client.write(key,now_port)
#add docker container firewall rule
if args.add:
if args.mode:
if args.source:
if args.source == "all":
source_ip='0.0.0.0/0.0.0.0'
else:
source_ip=args.source
if args.portmode=="dynamic":
sport=now_port
else:
sport=args.sport
if args.dport:
dport=args.dport
else:
print 'please input dest port!This port is container local port!'
sys.exit(1)
try:
now_id=len(eval(etcd_client.read('%s%s/firewall/nat-%s'%(docker_etcd_key,local_ip,args.container_name)).value))
except KeyError:
now_id='0'
except SyntaxError:
now_id='0'
now_id = int(now_id) + 1
if args.mode=="internal":
msg={'Id':now_id,'Mode':args.mode,'Container_name':args.container_name,'Source_ip':source_ip,'Port_mode':portmode,'Source_port':'%s'%sport,'Local_port':dport,'Container_ip':container_ip}
else:
if args.dest:
msg={'Id':now_id,'Mode':args.mode,'Container_name':args.container_name,'Source_ip':source_ip,'Destination_ip':args.dest,'Port_mode':portmode,'Source_port':'%s'%sport,'Local_port':dport,'Container_ip':container_ip}
else:
print 'please input destination ip'
sys.exit(1)
#add rule to iptables
try:
now_firewall_rule=etcd_client.read('%s%s/firewall/nat-%s'%(docker_etcd_key,local_ip,args.container_name)).value
now_firewall_rule=eval(now_firewall_rule)
except KeyError:
now_firewall_rule=[]
except SyntaxError:
now_firewall_rule=[]
for i in now_firewall_rule:
if msg['Local_port'] == i['Local_port'] and msg['Source_ip'] == i['Source_ip'] and msg['Mode'] == i['Mode'] and msg['Container_name'] == i['Container_name'] and msg['Source_port'] == i['Source_port']:
print 'This rule had exist!'
sys.exit(1)
now_firewall_rule.append(msg)
key='%s%s/firewall/nat-%s'%(docker_etcd_key,local_ip,args.container_name)
etcd_client.write(key,now_firewall_rule)
for i in now_firewall_rule:
print i
#del exist firewall rule
if args.rm:
try:
now_info=eval(etcd_client.read('%s%s/firewall/nat-%s'%(docker_etcd_key,local_ip,args.container_name)).value)
except KeyError:
print 'This Container:%s is not firewall rule!'%args.container_name
sys.exit(1)
except SyntaxError:
print 'This container:%s is not firewall rule!'%args.container_name
sys.exit(1)
old_id=[i['Id'] for i in now_info]
if args.rm != 'all':
if int(args.rm) not in old_id:
print 'you input rule id %s is not exit!'%args.rm
sys.exit(1)
for i in now_info:
if int(args.rm) == i['Id']:
now_info.remove(i)
print 'Follow is container_name:%s new firewall rule!'%args.container_name
for i in now_info:
print i
key='%s%s/firewall/nat-%s'%(docker_etcd_key,local_ip,args.container_name)
etcd_client.write(key,now_info)
sys.exit(0)
else:
now_info=''
key='%s%s/firewall/nat-%s'%(docker_etcd_key,local_ip,args.container_name)
etcd_client.write(key,now_info)
print 'This container_name:%s is not firewall rule!'%args.container_name
sys.exit(0)
#effect container firewall rule
if args.effect:
#check firewall filter exist
config_dir='/root/firewall'
iptables_config='iptables_base.txt'
if os.path.exists(config_dir) is False:
os.mkdir(config_dir)
if os.path.isfile('%s/%s'%(config_dir,iptables_config)) is False:
print 'no found base iptables config in %s/%s!'%(config_dir,iptables_config)
sys.exit(1)
docker_container_run=docker_container_run()
etcd_exist_firewall=[]
if args.container_name != "all":
container_name=args.container_name
try:
now_info=eval(etcd_client.read('%s%s/firewall/nat-%s'%(docker_etcd_key,local_ip,args.container_name)).value)
msg=[]
msg.append('#follow is container:%s firewall rulen'%args.container_name)
for i in now_info:
if 'Destination_ip' not in i:
text='-A DOCKER -s %s ! -i ovs2 -p tcp -m tcp --dport %s -j DNAT --to-destination %s:%s'%(i['Source_ip'],i['Source_port'],i['Container_ip'].split('/')[0],i['Local_port'])
msg.append('%sn'%text)
else:
text='-A DOCKER -s %s -d %s ! -i ovs2 -p tcp -m tcp --dport %s -j DNAT --to-destination %s:%s'%(i['Source_ip'],i['Destination_ip'],i['Source_port'],i['Container_ip'].split('/')[0],i['Local_port'])
msg.append('%sn'%text)
except SyntaxError:
msg=''
#wirte container firewall rule
iptables_new_config='iptables_nat_%s.txt'%args.container_name
f=open('%s/%s'%(config_dir,iptables_new_config),'w')
for i in msg:
f.write(i)
f.close()
else:
r = etcd_client.read('%s%s/firewall'%(docker_etcd_key,local_ip), recursive=True, sorted=True)
for child in r.children:
if child.dir is not True and 'nat' in child.key and child.key.split('/')[-1].split('nat-')[-1] in docker_container_run:
#etcd_exist_firewall.append(child.key.split('/')[-1].split('nat-')[-1])
try:
now_info=eval(etcd_client.read(child.key).value)
msg=[]
msg.append('#follow is container:%s firewall rulen'%child.key.split('/')[-1].split('nat-')[-1])
for i in now_info:
if 'Destination_ip' not in i:
text='-A DOCKER -s %s ! -i ovs2 -p tcp -m tcp --dport %s -j DNAT --to-destination %s:%s'%(i['Source_ip'],i['Source_port'],i['Container_ip'].split('/')[0],i['Local_port'])
msg.append('%sn'%text)
else:
text='-A DOCKER -s %s -d %s ! -i ovs2 -p tcp -m tcp --dport %s -j DNAT --to-destination %s:%s'%(i['Source_ip'],i['Destination_ip'],i['Source_port'],i['Container_ip'].split('/')[0],i['Local_port'])
msg.append('%sn'%text)
except SyntaxError:
msg=''
#wirte container firewall rule
iptables_new_config='iptables_nat_%s.txt'%child.key.split('/')[-1].split('nat-')[-1]
f=open('%s/%s'%(config_dir,iptables_new_config),'w')
for i in msg:
f.write(i)
f.close()
#get now all container firewall rule
all_firewall_file=[]
for parent,dirnames,filenames in os.walk(config_dir):
for filename in filenames:
if 'iptables_nat' in filename:
all_firewall_file.append(os.path.join(parent,filename))
#get iptables base file line
count = len(open('%s/%s'%(config_dir,iptables_config),'rU').readlines())
modify_post=int(count)-1
f=open('%s/%s'%(config_dir,iptables_config),'r+')
flist=f.readlines()
flist[modify_post]=''
f=open
for i in all_firewall_file:
f=open(i)
try:
container_text=f.read()
finally:
f.close()
flist.append(container_text)
flist.append('COMMITn')
f=open('%s/temp_iptables.txt'%config_dir,'w')
for i in flist:
f.write(i)
f.close()
#apply new firewall rule
shutil.copy('%s/temp_iptables.txt'%config_dir,'/etc/sysconfig/iptables')
#restart firewall
firewall_status=((subprocess.Popen("systemctl restart iptables &/dev/null && echo 0 || echo 1",shell=True,stdout=subprocess.PIPE)).stdout.readlines()[0]).strip('n')
if firewall_status != "0":
print 'firewall rule has problem!'
sys.exit(1)
else:
print 'config firewall rule is success!'
sys.exit(0)
if args.addip:
if '/' not in args.addip:
print 'please input ip:netmask!'
sys.exit(1)
external_ip=args.addip.split('/')[0]
external_ip_netmask=args.addip.split('/')[1]
#nmap ip exist!
nm = nmap.PortScanner()
nmap_result=nm.scan(external_ip,'60020')['nmap']['scanstats']['uphosts']
if int(nmap_result) == 1:
print 'you input ip:%s is online!'%external_ip
sys.exit(1)
try:
now_ip=eval(etcd_client.read('%s%s/external_ip/%s'%(docker_etcd_key,local_ip,external_ip)).value)
if now_ip['Container_name'] != args.container_name:
print 'this is external ip:%s is has used by container:%s.if you want to use it again,please delete this key:%s.'%(args.addip,now_ip['Container_name'],'%s%s/external_ip/%s'%(docker_etcd_key,local_ip,external_ip))
sys.exit(1)
except KeyError:
pass

#get device info
try:
now_device=etcd_client.read('%s%s/external_ip/device'%(docker_etcd_key,local_ip)).value
except KeyError:
now_device='em2:0'
new_device=now_device.split(':')[0]+':'+str(int(now_device.split(':')[1])+1)
key='%s%s/external_ip/device'%(docker_etcd_key,local_ip)
etcd_client.write(key,new_device)
#add new external ip in localhost
if int(external_ip_netmask) == 8:
external_ip_netmask='255.0.0.0'
elif int(external_ip_netmask) == 16:
external_ip_netmask='255.255.0.0'
elif int(external_ip_netmask) == 24:
external_ip_netmask='255.255.255.0'
elif int(external_ip_netmask) == 32:
external_ip_netmask='255.255.255.255'
else:
print 'you input netmask %s i can not calculate'%external_ip_netmask
sys.exit(1)
add_external_ip_status=((subprocess.Popen("/sbin/ifconfig %s %s netmask %s up &/dev/null && echo 0 || echo 1"%(new_device,external_ip,external_ip_netmask),shell=True,stdout=subprocess.PIPE)).stdout.readlines()[0]).strip('n')
if add_external_ip_status != "0":
print 'add external ip:%s is fail!'%args.addip
sys.exit(1)
else:
print 'add external ip:%s is success!'%args.addip
key='%s%s/external_ip/%s'%(docker_etcd_key,local_ip,external_ip)
info={'Ip':external_ip,'Netmask':external_ip_netmask,'Container_name':args.container_name,'Device':new_device,'Date':time.strftime('%Y.%m.%d-%T')}
etcd_client.write(key,info)
sys.exit(0)
if args.rmip:
try:
now_ip=eval(etcd_client.read('%s%s/external_ip/%s'%(docker_etcd_key,local_ip,args.rmip)).value)
except KeyError:
print 'This external ip:%s is not use in etcd!'%args.rmip
sys.exit(1)
if now_ip['Container_name'] != args.container_name:
print 'this is external ip:%s is has used by container:%s.if you want to delete it,please input correct container:%s and external ip:%s.'%(args.rmip,now_ip['Container_name'],now_ip['Container_name'],now_ip['Ip'])
sys.exit(1)
#delete use external ip in localhost
delete_external_ip_status=((subprocess.Popen("/sbin/ifconfig %s down &/dev/null && echo 0 || echo 1"%(now_ip['Device']),shell=True,stdout=subprocess.PIPE)).stdout.readlines()[0]).strip('n')
if delete_external_ip_status != "0":
print 'delete external ip:%s is fail!'%args.rmip
sys.exit(1)
else:
print 'delete external ip:%s is success!'%args.rmip
key='%s%s/external_ip/%s'%(docker_etcd_key,local_ip,args.rmip)
etcd_client.delete(key)
sys.exit(0)
sys.exit(1)

[root@docker-test3 code]# python modify_docker_container_firewall.py -h
usage: modify_docker_container_firewall.py [-h] [-l] [-a] [-r RM]
[-m {internal,external}]
[-s SOURCE] [-sp SPORT] [-d DEST]
[-dp DPORT] [-pm {dynamic,manual}]
[-e] [-ap ADDIP] [-rp RMIP]
container_name

It is userful tool to modify docker container firewall

positional arguments:
container_name list local docker container name

optional arguments:
-h, --help show this help message and exit
-l, --list show container firewall rules
-a, --add add container firewall rules
-r RM, --rm RM rm container firewall rules
-m {internal,external}, --mode {internal,external}
set container firewall mode
-s SOURCE, --source SOURCE
source ip view container firewall rules
-sp SPORT, --sport SPORT
source port view container firewall rules
-d DEST, --dest DEST destination ip container firewall rules
-dp DPORT, --dport DPORT
destination port view container firewall rules
-pm {dynamic,manual}, --portmode {dynamic,manual}
set container port mode
-e, --effect effect container firewall rules
-ap ADDIP, --addip ADDIP
add external ip to container
-rp RMIP, --rmip RMIP
rm external ip to container

[root@docker-test3 code]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c07b67c2382a docker.ops-chukong.com:5000/centos6-http:new "/usr/bin/supervisor 40 hours ago Up 40 hours test2
7c31bbfe0091 docker.ops-chukong.com:5000/centos6-http:new "/usr/bin/supervisor 3 days ago Up 15 hours test1
5eede798f189 docker.ops-chukong.com:5000/centos6-http:new "/usr/bin/supervisor 3 days ago Exited (0) 24 hours ago test3

[root@docker-test3 code]# python modify_docker_container_firewall.py test1 -l
This container:test1 is not firewall rule!
[root@docker-test3 code]# python modify_docker_container_firewall.py test2 -l
This container:test2 is not firewall rule!
[root@docker-test3 code]# python modify_docker_container_firewall.py test3 -l
This container:test3 info is not in etcd!

[root@docker-test3 code]# python modify_docker_container_firewall.py test1 -a -m internal -s 1.1.1.1/24 -pm dynamic -dp 22
{'Mode': 'internal', 'Container_name': 'test1', 'Source_port': '40030', 'Port_mode': 'dynamic', 'Local_port': '22', 'Source_ip': '1.1.1.1/24', 'Id': 1, 'Container_ip': '172.16.1.2/24'}

[root@docker-test3 code]# python modify_docker_container_firewall.py test1 -a -m internal -s 1.1.1.1/24 -pm manual -sp 400031 -dp 22
{'Mode': 'internal', 'Container_name': 'test1', 'Source_port': '40030', 'Source_ip': '1.1.1.1/24', 'Local_port': '22', 'Port_mode': 'dynamic', 'Id': 1, 'Container_ip': '172.16.1.2/24'}
{'Mode': 'internal', 'Container_name': 'test1', 'Source_port': '400031', 'Port_mode': 'manual', 'Local_port': '22', 'Source_ip': '1.1.1.1/24', 'Id': 2, 'Container_ip': '172.16.1.2/24'}

[root@docker-test3 code]# python modify_docker_container_firewall.py test1 -a -m internal -s 1.1.1.1/24 -pm manual -sp 40031 -dp 22
This rule had exist!

[root@docker-test3 code]# python modify_docker_container_firewall.py test1 -l
Follow is container:test1 firewall rule!
{'Mode': 'internal', 'Container_name': 'test1', 'Source_port': '40030', 'Port_mode': 'dynamic', 'Local_port': '22', 'Source_ip': '1.1.1.1/24', 'Id': 1, 'Container_ip': '172.16.1.2/24'}
{'Mode': 'internal', 'Container_name': 'test1', 'Source_port': '40031', 'Source_ip': '1.1.1.1/24', 'Local_port': '22', 'Port_mode': 'manual', 'Id': 2, 'Container_ip': '172.16.1.2/24'}

[root@docker-test3 code]# iptables -t nat -L -nv
Chain PREROUTING (policy ACCEPT 117K packets, 11M bytes)
pkts bytes target prot opt in out source destination
15431 914K DOCKER all -- * * 0.0.0.0/0 0.0.0.0/0 ADDRTYPE match dst-type LOCAL
Chain INPUT (policy ACCEPT 11906 packets, 716K bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 1462 packets, 86817 bytes)
pkts bytes target prot opt in out source destination
24 1424 DOCKER all -- * * 0.0.0.0/0 !127.0.0.0/8 ADDRTYPE match dst-type LOCAL
Chain POSTROUTING (policy ACCEPT 4994 packets, 234K bytes)
pkts bytes target prot opt in out source destination
0 0 MASQUERADE all -- * * 172.16.0.0/16 !172.16.0.0/16
Chain DOCKER (2 references)
pkts bytes target prot opt in out source destination

[root@docker-test3 code]# python modify_docker_container_firewall.py test1 -e
config firewall rule is success!

[root@docker-test3 code]# iptables -t nat -L -nv
Chain PREROUTING (policy ACCEPT 53 packets, 5242 bytes)
pkts bytes target prot opt in out source destination
5 300 DOCKER all -- * * 0.0.0.0/0 0.0.0.0/0 ADDRTYPE match dst-type LOCAL
Chain INPUT (policy ACCEPT 5 packets, 300 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 DOCKER all -- * * 0.0.0.0/0 !127.0.0.0/8 ADDRTYPE match dst-type LOCAL
Chain POSTROUTING (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 MASQUERADE all -- * * 172.16.0.0/16 !172.16.0.0/16
Chain DOCKER (2 references)
pkts bytes target prot opt in out source destination
0 0 DNAT tcp -- !ovs2 * 1.1.1.0/24 0.0.0.0/0 tcp dpt:40030 to:172.16.1.2:22
0 0 DNAT tcp -- !ovs2 * 1.1.1.0/24 0.0.0.0/0 tcp dpt:40031 to:172.16.1.2:22

[root@docker-test3 code]# tail -n 12 /etc/sysconfig/iptables
*nat
:PREROUTING ACCEPT [2:269]
:POSTROUTING ACCEPT [1739:127286]
:OUTPUT ACCEPT [1739:127286]
:DOCKER - [0:0]
-A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER
-A POSTROUTING -s 172.16.0.0/16 ! -d 172.16.0.0/16 -j MASQUERADE
-A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER
#follow is container:test1 firewall rule
-A DOCKER -s 1.1.1.1/24 ! -i ovs2 -p tcp -m tcp --dport 40030 -j DNAT --to-destination 172.16.1.2:22
-A DOCKER -s 1.1.1.1/24 ! -i ovs2 -p tcp -m tcp --dport 40031 -j DNAT --to-destination 172.16.1.2:22
COMMIT

[root@docker-test3 code]# python modify_docker_container_firewall.py test1 -l
Follow is container:test1 firewall rule!
{'Mode': 'internal', 'Container_name': 'test1', 'Source_port': '40030', 'Port_mode': 'dynamic', 'Local_port': '22', 'Source_ip': '1.1.1.1/24', 'Id': 1, 'Container_ip': '172.16.1.2/24'}
{'Mode': 'internal', 'Container_name': 'test1', 'Source_port': '40031', 'Source_ip': '1.1.1.1/24', 'Local_port': '22', 'Port_mode': 'manual', 'Id': 2, 'Container_ip': '172.16.1.2/24'}

[root@docker-test3 code]# python modify_docker_container_firewall.py test1 -r 2
Follow is container_name:test1 new firewall rule!
{'Mode': 'internal', 'Container_name': 'test1', 'Source_port': '40030', 'Port_mode': 'dynamic', 'Local_port': '22', 'Source_ip': '1.1.1.1/24', 'Id': 1, 'Container_ip': '172.16.1.2/24'}

[root@docker-test3 code]# python modify_docker_container_firewall.py test1 -e
config firewall rule is success!
[root@docker-test3 code]# iptables -t nat -L -nv
Chain PREROUTING (policy ACCEPT 4 packets, 200 bytes)
pkts bytes target prot opt in out source destination
3 168 DOCKER all -- * * 0.0.0.0/0 0.0.0.0/0 ADDRTYPE match dst-type LOCAL
Chain INPUT (policy ACCEPT 2 packets, 120 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 DOCKER all -- * * 0.0.0.0/0 !127.0.0.0/8 ADDRTYPE match dst-type LOCAL
Chain POSTROUTING (policy ACCEPT 1 packets, 40 bytes)
pkts bytes target prot opt in out source destination
0 0 MASQUERADE all -- * * 172.16.0.0/16 !172.16.0.0/16
Chain DOCKER (2 references)
pkts bytes target prot opt in out source destination
0 0 DNAT tcp -- !ovs2 * 1.1.1.0/24 0.0.0.0/0 tcp dpt:40030 to:172.16.1.2:22
[root@docker-test3 code]# tail -n 12 /etc/sysconfig/iptables
# Completed on Fri Dec 6 10:59:13 2013
*nat
:PREROUTING ACCEPT [2:269]
:POSTROUTING ACCEPT [1739:127286]
:OUTPUT ACCEPT [1739:127286]
:DOCKER - [0:0]
-A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER
-A POSTROUTING -s 172.16.0.0/16 ! -d 172.16.0.0/16 -j MASQUERADE
-A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER
#follow is container:test1 firewall rule
-A DOCKER -s 1.1.1.1/24 ! -i ovs2 -p tcp -m tcp --dport 40030 -j DNAT --to-destination 172.16.1.2:22
COMMIT

[root@docker-test3 code]# python modify_docker_container_firewall.py test1 -ap 117.121.x.99/24
add external ip:117.121.x.99/24 is success!
[root@docker-test3 code]# ping 117.121.x.99 -c 2
PING 117.121.x.99 (117.121.x.99) 56(84) bytes of data.
64 bytes from 117.121.x.99: icmp_seq=1 ttl=64 time=0.039 ms
64 bytes from 117.121.x.99: icmp_seq=2 ttl=64 time=0.032 ms
--- 117.121.x.99 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.032/0.035/0.039/0.006 ms

[root@docker-test3 code]# python modify_docker_container_firewall.py test1 -a -m external -pm dynamic -s all -d 117.121.x.99 -dp 22
{'Mode': 'internal', 'Container_name': 'test1', 'Source_port': '40030', 'Source_ip': '1.1.1.1/24', 'Local_port': '22', 'Port_mode': 'dynamic', 'Id': 1, 'Container_ip': '172.16.1.2/24'}
{'Destination_ip': '117.121.x.99', 'Mode': 'external', 'Container_name': 'test1', 'Source_port': '40033', 'Port_mode': 'dynamic', 'Local_port': '22', 'Source_ip': '0.0.0.0/0.0.0.0', 'Id': 2, 'Container_ip': '172.16.1.2/24'}

[root@docker-test3 code]# python modify_docker_container_firewall.py test1 -e
config firewall rule is success!
[root@docker-test3 code]# iptables -t nat -L -nv
Chain PREROUTING (policy ACCEPT 16 packets, 1308 bytes)
pkts bytes target prot opt in out source destination
1 60 DOCKER all -- * * 0.0.0.0/0 0.0.0.0/0 ADDRTYPE match dst-type LOCAL
Chain INPUT (policy ACCEPT 1 packets, 60 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 DOCKER all -- * * 0.0.0.0/0 !127.0.0.0/8 ADDRTYPE match dst-type LOCAL
Chain POSTROUTING (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 MASQUERADE all -- * * 172.16.0.0/16 !172.16.0.0/16
Chain DOCKER (2 references)
pkts bytes target prot opt in out source destination
0 0 DNAT tcp -- !ovs2 * 1.1.1.0/24 0.0.0.0/0 tcp dpt:40030 to:172.16.1.2:22
0 0 DNAT tcp -- !ovs2 * 0.0.0.0/0 117.121.x.99 tcp dpt:40033 to:172.16.1.2:22

[root@docker-test3 code]# ssh 117.121.x.99 -l root -p 40033
The authenticity of host '[117.121.x.99]:40033 ([117.121.x.99]:40033)' can't be established.
RSA key fingerprint is 39:7c:13:9f:d4:b0:d7:63:fc:ff:ae:e3:46:a4:bf:6b.
Are you sure you want to continue connecting (yes/no)"htmlcode">

[root@docker-test3 code]# python modify_docker_container_firewall.py test2 -a -m internal -s 1.1.1.1/24 -pm dynamic -dp 22
{'Mode': 'internal', 'Container_name': 'test2', 'Source_port': '40034', 'Port_mode': 'dynamic', 'Local_port': '22', 'Source_ip': '0.0.0.0/0.0.0.0', 'Id': 1, 'Container_ip': '172.16.1.4/24'}
{'Mode': 'internal', 'Container_name': 'test2', 'Source_port': '40035', 'Source_ip': '0.0.0.0/0.0.0.0', 'Local_port': '22', 'Port_mode': 'dynamic', 'Id': 2, 'Container_ip': '172.16.1.4/24'}
{'Mode': 'internal', 'Container_name': 'test2', 'Source_port': '40036', 'Port_mode': 'dynamic', 'Local_port': '22', 'Source_ip': '1.1.1.1/24', 'Id': 3, 'Container_ip': '172.16.1.4/24'}


然后我在修改一下test1的


[root@docker-test3 code]# python modify_docker_container_firewall.py test1 -a -m internal -s 2.2.2.2/24 -pm dynamic -dp 22
{'Mode': 'internal', 'Container_name': 'test1', 'Source_port': '40030', 'Port_mode': 'dynamic', 'Local_port': '22', 'Source_ip': '1.1.1.1/24', 'Id': 1, 'Container_ip': '172.16.1.2/24'}
{'Destination_ip': '117.121.x.99', 'Mode': 'external', 'Container_name': 'test1', 'Source_port': '40033', 'Source_ip': '0.0.0.0', 'Local_port': '22', 'Port_mode': 'dynamic', 'Id': 2, 'Container_ip': '172.16.1.2/24'}
{'Mode': 'internal', 'Container_name': 'test1', 'Source_port': '40037', 'Port_mode': 'dynamic', 'Local_port': '22', 'Source_ip': '2.2.2.2/24', 'Id': 3, 'Container_ip': '172.16.1.2/24'}


之前如果想动态生效需要知道容器名，下面可以把容器名那里输入all，就可以生效所有已经设置的规则


[root@docker-test3 code]# python modify_docker_container_firewall.py all -e
config firewall rule is success!
[root@docker-test3 code]# iptables -t nat -L -nv
Chain PREROUTING (policy ACCEPT 20 packets, 1914 bytes)
pkts bytes target prot opt in out source destination
1 60 DOCKER all -- * * 0.0.0.0/0 0.0.0.0/0 ADDRTYPE match dst-type LOCAL
Chain INPUT (policy ACCEPT 1 packets, 60 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 DOCKER all -- * * 0.0.0.0/0 !127.0.0.0/8 ADDRTYPE match dst-type LOCAL
Chain POSTROUTING (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 MASQUERADE all -- * * 172.16.0.0/16 !172.16.0.0/16
Chain DOCKER (2 references)
pkts bytes target prot opt in out source destination
0 0 DNAT tcp -- !ovs2 * 1.1.1.0/24 0.0.0.0/0 tcp dpt:40030 to:172.16.1.2:22
0 0 DNAT tcp -- !ovs2 * 0.0.0.0 117.121.x.99 tcp dpt:40033 to:172.16.1.2:22
0 0 DNAT tcp -- !ovs2 * 2.2.2.0/24 0.0.0.0/0 tcp dpt:40037 to:172.16.1.2:22
0 0 DNAT tcp -- !ovs2 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:40034 to:172.16.1.4:22
0 0 DNAT tcp -- !ovs2 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:40035 to:172.16.1.4:22
0 0 DNAT tcp -- !ovs2 * 1.1.1.0/24 0.0.0.0/0 tcp dpt:40036 to:172.16.1.4:22
[root@docker-test3 code]# tail -n 15 /etc/sysconfig/iptables
:POSTROUTING ACCEPT [1739:127286]
:OUTPUT ACCEPT [1739:127286]
:DOCKER - [0:0]
-A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER
-A POSTROUTING -s 172.16.0.0/16 ! -d 172.16.0.0/16 -j MASQUERADE
-A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER
#follow is container:test1 firewall rule
-A DOCKER -s 1.1.1.1/24 ! -i ovs2 -p tcp -m tcp --dport 40030 -j DNAT --to-destination 172.16.1.2:22
-A DOCKER -s 0.0.0.0 -d 117.121.x.99 ! -i ovs2 -p tcp -m tcp --dport 40033 -j DNAT --to-destination 172.16.1.2:22
-A DOCKER -s 2.2.2.2/24 ! -i ovs2 -p tcp -m tcp --dport 40037 -j DNAT --to-destination 172.16.1.2:22
#follow is container:test2 firewall rule
-A DOCKER -s 0.0.0.0/0.0.0.0 ! -i ovs2 -p tcp -m tcp --dport 40034 -j DNAT --to-destination 172.16.1.4:22
-A DOCKER -s 0.0.0.0/0.0.0.0 ! -i ovs2 -p tcp -m tcp --dport 40035 -j DNAT --to-destination 172.16.1.4:22
-A DOCKER -s 1.1.1.1/24 ! -i ovs2 -p tcp -m tcp --dport 40036 -j DNAT --to-destination 172.16.1.4:22
COMMIT


很简单吧，比以前需要找到容器的ip，然后收到去防火墙里修改，并且修改的时候，还得计算给予的来源端口，现在是否舒服很多，以后有平台想使用的话，直接调用就可以。
8、删除额外的外网ip
使用rp参数


[root@docker-test3 code]# python modify_docker_container_firewall.py test2 -rp 117.121.x.99
this is external ip:117.121.x.99 is has used by container:test1.if you want to delete it,please input correct container:test1 and external ip:117.121.x.99.
[root@docker-test3 code]# python modify_docker_container_firewall.py test1 -rp 117.121.x.99
delete external ip:117.121.x.99 is success!


删除的时候，还必须制定对应的容器与额外外网ip，否则删除失败，但提供对于的容器与ip


[root@docker-test3 code]# ping -c2 117.121.x.99
PING 117.121.x.99 (117.121.x.99) 56(84) bytes of data.
From 117.121.x.3 icmp_seq=1 Destination Host Unreachable
From 117.121.x.3 icmp_seq=2 Destination Host Unreachable
--- 117.121.x.99 ping statistics ---
2 packets transmitted, 0 received, +2 errors, 100% packet loss, time 1000ms
pipe 2


可以看到已经删除完成，ping不通了。
目前docker方面的文章，已经完成了：
1、安装docker
2、动态扩容docker容器的空间
3、动态绑定volume
4、docker多主机网络互联
5、docker持久化固定ip
6、docker智能添加与修改防火墙
以后有空给大家分享Docker集群与平台方面知识，希望大家多提意见。