之前由于工作需求，编写了SaltStack的 LVS远程执行模块 ， LVS service状态管理模块 及 LVS server状态管理模块 ，并提交给了SaltStack官方 Loadblance(DR)及RealServer的配置管理.
前置阅读
LVS-DR模式配置详解 ，需要注意的是，LVS-DR方式工作在数据链路层，文中描述需要开启ip_forward，其实没有必要， 详情见 LVS DR模式原理剖析
环境说明
三台服务器用于LVS集群，其中主机名为lvs的担当的角色为loadblance，对应的IP地址为192.168.36.10；主机名为web-01和web-02的主机担当的角色为RealServer， 对应的IP地址分别为192.168.36.11及192.168.36.12
LVS VIP: 192.168.36.33， Port: 80， VIP绑定在lvs的eth1口
最最重要的是loadblance主机为Linux，并已安装ipvsadm， Windows/Unix等主机的同学请绕过吧，这不是我的错......
开工
Note
以下所有操作均在Master上进行
配置SaltStack LVS模块
如果使用的Salt版本已经包含了lvs模块，请忽略本节内容，测试方法:
salt ‘lvs‘ cmd.run "python -c ‘import salt.modules.lvs‘"
如果输出有 ImportError 字样，则表示模块没有安装，需要进行如下操作:
test -d /srv/salt/_modules || mkdir /srv/salt/_modules
test -d /srv/salt/_states || mkdir /srv/salt/_states
wget?https://raw.github.com/saltstack/salt/develop/salt/modules/lvs.py?-O /srv/salt/_modules/lvs.py
wget?https://raw.github.com/saltstack/salt/develop/salt/states/lvs_service.py?-O /srv/salt/_states/lvs_service.py
wget?https://raw.github.com/saltstack/salt/develop/salt/states/lvs_server.py?-O /srv/salt/_states/lvs_server.py
配置pillar
/srv/pillar/lvs/loadblance.sls
lvs-loadblance:
- name: lvstest
vip: 192.168.36.33
vip-nic: eth1
port: 80
protocol: tcp
scheduler: wlc
realservers:
- name: web-01
ip: 192.168.36.11
port: 80
packet_forward_method: dr
weight: 10
- name: web-02
ip: 192.168.36.12
port: 80
packet_forward_method: dr
weight: 30
/srv/pillar/lvs/realserver.sls
lvs-realserver:
- name: lvstest
vip: 192.168.36.33
/srv/pillar/top.sls
base:
‘lvs‘:
- lvs.loadblance
‘web-0*‘:
- lvs.realserver
编写States
/srv/salt/lvs/loadblance.sls
# config lvs
{% if ‘lvs-loadblance‘ in pillar %}
{% for each_lvs in pillar[‘lvs-loadblance‘] %}
# config lvs vip
{{each_lvs[‘name‘]}}-vip:
network.managed:
- name: {{each_lvs[‘vip-nic‘] + ":" + each_lvs[‘name‘]}}
- enable: True
- type: eth
- proto: none
- ipaddr: {{each_lvs[‘vip‘]}}
- netmask: 255.255.255.255
{% set service_address = each_lvs[‘vip‘] + ":" + each_lvs[‘port‘]|string() %}
{{each_lvs[‘name‘]}}-service:
lvs_service.present:
- protocol: {{each_lvs[‘protocol‘]}}
- service_address: {{service_address}}
- scheduler: {{each_lvs[‘scheduler‘]}}
{% for each_rs in each_lvs[‘realservers‘] %}
{% set server_address = each_rs[‘ip‘] + ":" + each_rs[‘port‘]|string() %}
{{each_rs[‘name‘]}}-server:
lvs_server.present:
- protocol: {{each_lvs[‘protocol‘]}}
- service_address: {{service_address}}
- server_address: {{server_address}}
- packet_forward_method: {{each_rs[‘packet_forward_method‘]}}
- weight: {{each_rs[‘weight‘]}}
{% endfor %}
{% endfor %}
{% endif %}
/srv/salt/lvs/realserver.sls
# ignore arp
net.ipv4.conf.all.arp_ignore:
sysctl.present:
- value: 1
net.ipv4.conf.lo.arp_ignore:
sysctl.present:
- value: 1
net.ipv4.conf.all.arp_announce:
sysctl.present:
- value: 2
net.ipv4.conf.lo.arp_announce:
sysctl.present:
- value: 2
# config lvs vip
{% if ‘lvs-realserver‘ in pillar %}
{% for each_lvs in pillar[‘lvs-realserver‘] %}
lvs-vip:
network.managed:
- name: {{"lo" + ":" + each_lvs[‘name‘]}}
- enable: True
- type: eth
- proto: none
- ipaddr: {{each_lvs[‘vip‘]}}
- netmask: 255.255.255.255
{% endfor %}
{% endif %}
/srv/salt/top.sls
base:
‘lvs‘:
- lvs.loadblance
‘web-0*‘:
- lvs.realserver
应用配置
如果之前进行 配置LVS模块 的操作，需要进行同步模块的操作:
salt ‘lvs*‘ saltutil.sync_all
应用LVS配置:
salt ‘*‘ state.highstate
查看LVS当前状态:
salt ‘lvs‘ lvs.list
总结
通过SaltStack LVS模块，可以快速的查询LVS状态，执行LVS常用指令及完成LVS的配置管理。如有需要调整RealServer规则或添加新的RealServer， 只需要修改 /srv/pillar/lvs/loadblance.sls ，然后应用配置即可.
本文选自：http://www.spasvo.com/news/html/2014121155049_2.html