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gen_conf.py
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#-*- coding: utf-8 -*-
"""
生成 lvs 配置文件.
"""
import os
from jinja2 import Environment, FileSystemLoader
def template(template_dir, template_dest_dir, device, vipnets, vip2ws,
lb_infos):
""" 生成 lvs 配置文件.
"""
if not os.path.exists(template_dest_dir):
os.mkdir(template_dest_dir)
# 模板名称.
keepalived_template = "keepalived.conf"
sub_keepalived_template = "sub_keepalived.conf"
zebra_template = "zebra.conf"
ospfd_template = "ospfd.conf"
# 拿到 vip 列表.
vips = [i["vip"] for i in vip2ws]
wstypes = [i["wstype"] for i in vip2ws]
for lb_info in lb_infos:
# 拿到 lb 信息.
lb = lb_info["hostname"]
internalip = lb_info["internalip"]
internalnetmask = lb_info["internalnetmask"]
internalgateway = lb_info["internalgateway"]
routerid = lb_info["routerid"]
ospfnet = lb_info["ospfnet"]
localips = lb_info["localips"]
# lb 配置文件基目录.
lb_dir = template_dest_dir + "/" + lb
os.mkdir(lb_dir)
# keepalived 配置文件目录.
lb_keepalived_dir = lb_dir + "/keepalived"
os.mkdir(lb_keepalived_dir)
# ospfd 配置文件目录.
lb_osfpd_dir = lb_dir + "/ospfd"
os.mkdir(lb_osfpd_dir)
# 模板环境.
j2_env = Environment(
loader=FileSystemLoader(template_dir), trim_blocks=True)
# 生成主 keepalived 配置文件.
ret = j2_env.get_template(keepalived_template).render(
lips=localips, vips=vips, lb=lb.split(".")[0])
with file(lb_keepalived_dir + "/keepalived.conf", 'w') as f:
f.writelines(ret)
# 生成 zebra 配置文件.
ret = j2_env.get_template(zebra_template).render(lb=lb)
with file(lb_osfpd_dir + "/zebra.conf", 'w') as f:
f.writelines(ret)
# 生成 ospfd 配置文件.
ret = j2_env.get_template(ospfd_template).render(
lb=lb,
routerid=routerid,
device=device,
ospfnet=ospfnet,
vipnets=vipnets)
with file(lb_osfpd_dir + "/ospfd.conf", 'w') as f:
f.writelines(ret)
# 生成 keepalived 的 VIP 配置文件.
for i in vip2ws:
# vip 信息.
vip = i["vip"]
wstype = i["wstype"]
# port 信息.
if "ports" not in i:
ports = [
{"sport": 80,
"dport": 80,
"synproxy": 1,
"persistence_timeout": 50}, {"sport": 443,
"dport": 443,
"synproxy": 1,
"persistence_timeout": 50}
]
else:
ports = list()
for j in i["ports"]:
if "synproxy" not in j:
j["synproxy"] = 1
elif "persistence_timeout" not in j:
j["persistence_timeout"] = 50
ports.append(j)
# 后端机器列表.
wss_ips = i["wss"]
ret = j2_env.get_template(sub_keepalived_template).render(
vip=vip, ports=ports, wss=wss_ips,wstype=wstype)
with file(lb_keepalived_dir + "/" + wstype + ".conf", 'w') as f:
f.writelines(ret)
def main():
template_dir = "./template"
template_dest_dir = "/tmp/lvs/"
device = "bond0"
vipnets = ["10.0.12.0/24", "10.0.13.0/24", "10.0.14.0/24"]
vip2ws = [
{
'wstype': 'apps',
'vip': '10.0.12.201',
'wss':
['10.3.140.121', '10.3.140.122', '10.3.140.123', '10.3.140.124'],
'ports': [
{'dport': 80,
'synproxy': 1,
'sport': 80,
'persistence_timeout': 50}, {'dport': 443,
'synproxy': 1,
'sport': 443,
'persistence_timeout': 50}
]
}, {
'wstype': 'search',
'vip': '10.0.12.202',
'wss':
['10.3.141.131', '10.3.141.132', '10.3.141.133', '10.3.141.134'],
'ports': [
{'dport': 80,
'synproxy': 1,
'sport': 80,
'persistence_timeout': 50}, {'dport': 443,
'synproxy': 1,
'sport': 443,
'persistence_timeout': 50}
]
}
]
lb_infos = [
{
"internalgateway": "10.0.18.1",
"internalnetmask": "255.255.255.224",
"hostname": "internal",
"routerid": "10.0.18.2",
"internalip": "10.0.18.2",
"ospfnet": "10.0.18.0/27",
"localips": [
'10.0.18.20-151'
]
}, {
"internalgateway": "10.0.18.33",
"internalnetmask": "255.255.255.224",
"hostname": "bgp",
"routerid": "10.0.18.34",
"internalip": "10.0.18.34",
"ospfnet": "10.0.18.32/27",
"localips": [
'10.0.18.152-232'
]
}
]
print template(template_dir, template_dest_dir, device, vipnets, vip2ws, lb_infos)
def dsnat():
template_dir = "./template"
template_dest_dir = "/tmp/lvs/dsnat"
dsnat_template = "dsnat.conf"
if not os.path.exists(template_dest_dir):
os.mkdir(template_dest_dir)
#默认出口ip池
default_pool = ['1.1.1.1','2.2.2.2','3.3.3.3']
#特殊网段出口ip池
spec_pools = [
{
'pool':'s1',
'dest_ip':['6.6.6.6','8.8.8.8'],
'src_ip_range':'10.3.143.0/24'
},
{
'pool':'s2',
'dest_ip':['9.9.9.9','10.10.10.10'],
'src_ip_range':'10.4.12.0/24'
}
]
j2_env = Environment(
loader=FileSystemLoader(template_dir), trim_blocks=True)
ret = j2_env.get_template(dsnat_template).render(default_pool=default_pool,spec_pools=spec_pools)
with file(template_dest_dir + "/keepalived.conf", 'w') as f:
f.writelines(ret)
if __name__ == '__main__':
main()
dsnat()