利用shell或者python脚本完成KVM虚拟机的批量创建(下)

个人环境

（1）Centos 7.4(图形化)

（2）Python-3.7.3

（3）pycharm-2018.3.7

具体的安装我就不做演示了，具体请看以下参考文献。老规矩，时空穿梭器：
https://www.cnblogs.com/anttech/p/12554201.html
那我就废话不多说，直接上代码了：
先来看一下大体框架：

1.首先是vm_create.py(总入口):

#anliu
'''
interface
'''
import os,sys
sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
from core import main

if __name__ == '__main__':
    main.run()

2.其次是vm_config.py(配置文件和镜像以及数据库的路径)：

conf = {
    "src_conf_path" :"/etc/libvirt/qemu",
    "det_conf_path" : "/opt/vmcreate/tmp"
}
image = {
    "src_image_path" : "/var/lib/libvirt/images",
    "det_image_path" : "/data"
}
db = {
    "db_path":"/opt/vmcreate/db"
}

在这里，原来本人这只小菜鸟python还没学到数据库，只能先写到文件中了，求大佬放过
3.接下来是main.py:

#anliu
'''
main
'''
import os,sys,json
sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
from conf import vm_config
from core import vmcreate
message = {
    "vm_name":None,
    "vm_type":None,
    "vm_cpu_max":None,
    "vm_cpu_curr":None,
    "vm_mem_max":None,
    "vm_mem_curr":None,
    "vm_vnc_port":None,
}

def interactive():
    message["vm_name"] = input("vm_name:")
    message["vm_type"] = input("vm_type:")
    message["vm_cpu_max"] = input("vm_cpu_max:")
    message["vm_cpu_curr"] = input("vm_cpu_curr:")
    message["vm_mem_max"] = 1024*1024*int(input("vm_mem_max:"))
    message["vm_mem_curr"] = 1024*1024*int(input("vm_mem_curr:"))
    message["vm_vnc_port"] = input("vm_vnc_port:")

    print(message)
    with open(os.path.join(vm_config.db["db_path"],message["vm_name"]),"w",encoding="utf-8") as f1:
        json.dump(message,f1)
interactive()

def run():
    vmcreate.copy_vm_conf(message["vm_type"],message["vm_name"])
    vmcreate.copy_vm_image(message["vm_type"],message["vm_name"])
    vmcreate.mod_vm_conf(message)
    vmcreate.define_vm(message["vm_name"])

4.然后是vmcreate.py(创建虚拟机):

#anliu
'''
the script is used created vm....
'''
import shutil,os,uuid,sys
from xml.etree import ElementTree as ET

sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
from conf import vm_config

def copy_vm_conf(src_name,det_name):
    # shutil.copyfile(src_conf_path + "/" + src_name,det_conf_path + "/" + det_name)
    shutil.copyfile(os.path.join(vm_config.conf["src_conf_path"],src_name + ".xml"),os.path.join(vm_config.conf["det_conf_path"],det_name + ".xml"))

#copy_vm_conf("anliu01","test01")


def copy_vm_image(src_name,det_name):
    shutil.copyfile(os.path.join(vm_config.image["src_image_path"],src_name + ".img"),os.path.join(vm_config.image["det_image_path"],det_name + ".img"))

#copy_vm_image("anliu01","test01")



#def mod_vm_conf(det_name,memory_max,memory_curr,vcpu_max,vcpu_curr,vnc_port):
def mod_vm_conf(message):
    tree = ET.parse(os.path.join(vm_config.conf["det_conf_path"],message["vm_name"] + ".xml"))
    root = tree.getroot()

    for node1 in root.iter("name"):
        # print(node1.tag,node1.text)
        node1.text = message["vm_name"]

    for node2 in root.iter("uuid"):
        # print(node2.tag,node2.text)
        node2.text = str(uuid.uuid1())

    for node3 in root.iter("memory"):
        # print(node3.tag,node3.text)
        node3.text = str(message["vm_mem_max"])

    for node4 in root.iter("currentMemory"):
        # print(node4.tag,node4.text)
        node4.text = str(message["vm_mem_curr"])

    for node5 in root.iter("vcpu"):
        # print(node5.tag,node5.text,node5.attrib)
        node5.text = message["vm_cpu_max"]
        node5.attrib["current"] = message["vm_cpu_curr"]

    for node6 in root.iter("source"):
        try:
            # print(node6.attrib["file"])
            node6.attrib["file"] = os.path.join(vm_config.image["det_image_path"],message["vm_name"] + ".img")
        except KeyError as key:
            pass

    for node7 in root.iter("graphics"):
        # print(node7.attrib)
        node7.attrib["port"] = message["vm_vnc_port"]

    tree.write(os.path.join(vm_config.conf["det_conf_path"],message["vm_name"] + ".xml"))


#mod_vm_conf("test01",2,2,"2","1","5988")


def define_vm(det_name):
    os.chdir(vm_config.conf["det_conf_path"])
    os.system("virsh define %s"%det_name + ".xml")
    os.system("virsh start %s"%det_name)

#define_vm("test01")

我把一些刚开始写的东西都留下来加了注释，只是留给大家一个开始构思的思路。
5.最后给大家分享一个虚拟机的配置文件，练习时候就可以用:

  anliu01
  814ad4be-8987-493c-98e8-203258ef1e46
  2097152
  2097152
  1
  
    hvm
    
  
  
    
    
  
  
    Broadwell-noTSX-IBRS
    
    
    
  
  
    
    
    
  
  destroy
  restart
  destroy
  
    
    
  
  
    /usr/libexec/qemu-kvm
    
      
      
      
      

    
    
      

    
    
      
      

    
    
      
      

    
    
      
      

    
    
      

    
    
    
      
      
      
      

    
    
      
        
      
    
    
      
    
    
      
      

    
    
      

    
    
    
    
      
    
    

优化：1.拉取镜像，配置文件，定义虚拟机后成功与否的状态都可以加日志和时间戳。2.在准备定义虚拟机的时候，加一些镜像和配置文件是否已经就绪等判断。期待你的优化，再会！