标签：ansible
假如你要在一台机器安装多个tomcat或者安装多台tomcat，你可以选择
假设现在tomcat有三个，分别为cxx,wxx,sxx
多建立对应的yml文件，一个项目一个
copy.yml,install.yml,delete.yml 分别一个
我选择第二种方法，变量可以定义在一个文件中
借用ansible生成动态的hosts优势
#!/usr/bin/python
# coding:utf-8
import sqlite3
import sys
try:
import json
except ImportError:
import simplejson as json
def grouplist():
inventory = {}
inventory[‘local‘] = [‘127.0.0.1‘]
sfile=‘/etc/ansible/books.txt‘
with open(sfile,‘rb‘) as f:
for i in f.readlines():
group=i.strip().split()[0]
name=i.strip().split()[1]
if not group in inventory:
inventory[group] = {
‘hosts‘: []
}
inventory[group][‘hosts‘].append(name)
print json.dumps(inventory, indent=4)
def hostinfo(name):
vars = {}
vars = {
‘admin‘: ‘Jane Jolie‘,
‘datacenter‘: 1
}
print json.dumps(vars, indent=4)
if __name__ == ‘__main__‘:
if len(sys.argv) == 2 and (sys.argv[1] == ‘--list‘):
grouplist()
elif len(sys.argv) == 3 and (sys.argv[1] == ‘--host‘):
hostinfo(sys.argv[2])
else:
print "Usage: %s --list or --host <hostname>" % sys.argv[0]
sys.exit(1)这个配置文件，指明端口和分组。cxx就是分组，后面的端口，你懂的。
cat books.txt cxx 192.168.1.3 sc_tomcat 8005 8080 wxx 192.168.1.3 sc_tomcat 8006 8081 sxx 192.168.1.3 sc_tomcat 8007 8082
先来说ansible部分吧
目录结构
[root@localhost roles]# tree . ├── copy │ ├── default │ ├── files │ │ └── ROOT │ │ └── test.html │ ├── meta │ │ └── test │ │ └── test.html │ └── tasks │ ├── copy.yml │ ├── delete.yml │ ├── install.yml │ ├── main.bak │ ├── main.yml │ ├── main.yml.v1 │ └── main.yml.v2 ├── delete │ ├── default │ ├── files │ │ └── ROOT │ │ └── test.html │ ├── handlers │ │ └── main.yml │ ├── meta │ │ └── test │ │ └── test.html │ ├── tasks │ │ ├── copy.yml │ │ ├── delete.yml │ │ ├── install.yml │ │ ├── main.bak │ │ ├── main.yml │ │ ├── main.yml.v1 │ │ └── main.yml.v2 │ ├── templates │ │ ├── server.xml │ │ └── tomcat.sh │ └── vars │ └── main.yml └── install ├── default ├── files │ └── ROOT │ └── test.html ├── handlers │ └── main.yml ├── meta │ └── test │ └── test.html ├── tasks │ ├── copy.yml │ ├── delete.yml │ ├── install.yml │ ├── main.bak │ ├── main.yml │ ├── main.yml.v1 │ └── main.yml.v2 ├── templates │ ├── server.xml │ └── tomcat.sh └── vars └── main.yml
对比以前的变化是
cd /etc/ansible/tomcat/roles
install中的install.yml 文件改变了
cd /etc/ansible/tomcat/roles/install/tasks
[root@localhost tasks]# cat install.yml
- name: pro
file: path=/opt/apps/{{cxx_pro_dir}} state=directory
- name: tar
shell: chdir=/opt/ea rm -rf {{cxx_dir}} && cp -r tomcat {{cxx_dir}}
- name: copy server.xml
template: src=server.xml dest=/opt/ea/{{cxx_dir}}/conf/ force=yes mode=0644
- name: rm webapps
file: dest=/opt/ea/{{cxx_dir}}/webapps/ state=absent
- name: copy tomcat.sh
copy: src=/opt/src/tomcat.sh dest=/opt/ea/{{cxx_pro_dir}}.sh owner=tomcat group=tomcat
- name: modify tomcat.sh
shell: chdir=/opt/ea sed -i ‘s%/ea/tomcat%/ea/{{cxx_dir}}%g‘ {{cxx_pro_dir}}.sh
- name: modify
file: path=/opt/ea/{{cxx_dir}}/ owner=tomcat group=tomcat mode=0755
- name: chown
file: path=/opt/ea/{{cxx_dir}}/ state=directory recurse=yes owner=tomcat group=tomcat
- name: 首次启动tomcat
shell: cd /opt/ea && source /etc/profile && sudo -i -u tomcat nohup sh {{cxx_pro_dir}}.sh start &
- name: copy test
copy: src=/etc/ansible/tomcat/roles/install/meta/test dest=/opt/apps/{{cxx_pro_dir}}/cd /etc/ansible/tomcat/roles/install/vars 变量文件有大改变
说明cxx_pro_dir 也可以指明wxx_pro_dir,你可以把它当做变量，上面的install.yml引用这个变量而已。
[root@localhost vars]# cat main.yml
cxx_pro_dir: "{{ cxx_pro_dir }}"
cxx_dir: "{{ cxx_dir }}"
cxx_port1: "{{ cxx_port1 }}"
cxx_port2: "{{ cxx_port2 }}"ansible部分完结。
因为有好多主机，不想手动书写ansible执行文件，可以用python脚本自动生成
主要想自动生成这样的脚本
ansible-playbook -i /etc/ansible/test.py copy.yml --extra-vars "host=192.168.1.3"
ansible-playbook -i /etc/ansible/test.py install.yml --extra-vars "host=192.168.1.3 cxx_pro_dir=cxx cxx_dir=cxx_tomcat cxx_port1=8005 cxx_port2=8080"
以下python脚本，读取生成的
声明 什么cxx都是变量，你可以随便取名字
# !/usr/bin/env python # coding:utf-8 #import sqlite3 import sys try: import json except ImportError: import simplejson as json dfile=‘/etc/ansible/ansible.sh
‘‘‘
cxx 172.29.12.196 sc_tomcat 8005 8080
‘‘‘
def ansiblec(host,cxx_pro_dir=None,cxx_dir=None,cxx_port1=None,cxx_port2=None):
if cxx_port1==None:
stringa = ‘ansible-playbook -i /etc/ansible/test.py copy.yml --extra-vars "host=%s"‘ %(host)
return stringa
else:
stringb = ‘ansible-playbook -i /etc/ansible/test.py install.yml --extra-vars "host=%s cxx_pro_dir=%s cxx_dir=%s cxx_port1=%s cxx_port2=%s"‘ %(host,cxx_pro_dir,cxx_dir,cxx_port1,cxx_port2)
return stringb
def grouplist():
inventory = {}
sfile = ‘/etc/ansible/books.txt‘
with open(sfile, ‘rb‘) as f:
iplist=[]
glist=[]
for i in f.readlines():
group = i.strip().split()[0]
grouptomcat=group+"_"+"tomcat"
name = i.strip().split()[1]
cxx_port1=i.strip().split()[3]
cxx_port2=i.strip().split()[4]
iplist.append(ansiblec(name))
glist.append(ansiblec(name,group,grouptomcat,cxx_port1,cxx_port2))
# if not group in inventory:
# inventory[group] = {
# ‘hosts‘: []
# }
# inventory[group][‘hosts‘].append(name)
# for ip in inventory.iteritems():
# ipt= ip[1][‘hosts‘][0]
ipset=set(iplist)
gset=set(glist)
# print json.dumps(inventory, indent=4)
with open(dfile,‘wb‘) as f1:
for i in ipset:
line = str(i) + "\n"
f1.write(line)
for i in gset:
line = str(i) + "\n"
f1.write(line)
f1.close()
def hostinfo(name):
vars = {}
vars = {
‘admin‘: ‘Jane Jolie‘,
‘datacenter‘: 1
}
print json.dumps(vars, indent=4)
if __name__ == ‘__main__‘:
grouplist()直接执行这个脚本后，自动生成
/etc/ansible/ansible.sh
里面包含就是
ansible-playbook -i /etc/ansible/test.py copy.yml --extra-vars "host=192.168.1.3"
ansible-playbook -i /etc/ansible/test.py install.yml --extra-vars "host=192.168.1.3 cxx_pro_dir=cxx cxx_dir=cxx_tomcat cxx_port1=8005 cxx_port2=8080"
这样，通过两个python脚本，只需要一个配置文件，写明端口和应用名称，自动生成创建脚本。
剩余没有解决的问题
1.root权限，ansible最好不要用root权限
2.context.xml没有加入到模板里面去,主要做集群，可以自己添加
3.lib包，比如集群包没有，主要做session共享的集群包
4.没有自动启动脚本，这个需要写下tomcat的启动脚本
这是自己个人的想法，比以前快点。
本文出自 “python 运维” 博客，谢绝转载！
标签：ansible
原文地址：http://szgb17.blog.51cto.com/340201/1925198
