openstack client

openstack API를 활용한 VM live_migration을 수행하는 python script 이다.

import os

from keystoneauth1.identity import v3
from keystoneauth1 import session
from novaclient import client

def auth(user, passwd, url):
    auth = v3.Password(auth_url=url,
                       username=user,
                       password=passwd,
                       project_name='admin',
                       user_domain_id='default',
                       project_domain_name='default')
    sess = session.Session(auth=auth, verify=False)
    return sess

def migrate(srv, new_host):
    return srv.live_migrate(host=new_host, block_migration=False)

def main():
    user = 'admin'
    passwd = 'Password'
    sess = auth(user, passwd, 'http://192.168.1.1:5000/v3')
    nova = client.Client(2, session=sess)

    for srv in nova.servers.list():
        hostname = getattr(srv, "OS-EXT-SRV-ATTR:host")
        if (srv.name.find('TESTVM1') is 0) and \
           (hostname != "overcloud-compute-2.localdomain"):
           migrate(srv, "overcloud-compute-2.localdomain")
           print srv.name, hostname
        if (srv.name.find('TESTVM2') is 0) and \
           (hostname != "overcloud-compute-0.localdomain"):
           migrate(srv, "overcloud-compute-0.localdomain")
           print srv.name, hostname

if __name__ == '__main__':
    main()

아래 base.py에 보면 일반적으로 사용되는 function들이 나와있다. 참고하도록 한다.

- https://github.com/openstack/python-novaclient/blob/master/novaclient/base.py

참고사이트

- https://gist.github.com/djoreilly/888abbfc3425e54fa290

- https://www.ibm.com/developerworks/cloud/library/cl-openstack-pythonapis/index.html