ceph rbd 封装api

1.安装python，uwsgi，nginx环境

　　pip安装省略

yumgroupinstall"Developmenttools"
yuminstallzlib-develbzip2-develpcre-developenssl-develncurses-develsqlite-develreadline-develtk-devel
yuminstallpython-devel
pipinstalluwsgi

2.明白 Restful API
　　http://www.ruanyifeng.com/blog/2014/05/restful_api.html
3.了解flask框架
　　http://www.pythondoc.com/flask-restful/first.html
4.调用python插件库
　　http://docs.ceph.org.cn/rbd/librbdpy/
5.写接口程序

　　

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from flask import Flask, jsonify, make_response
import rados
import rbd
from flask.ext.httpauth import HTTPBasicAuth
import time
'''
ceph 接口封装，主要实现 CRD 功能
curl xxx.xx.xx.xx2/ceph/v1.0/rbd -u admin:d41d8cd98f00b204e9fdsafdsafdasf333f
curl -X POST xxx.xx.xx.xx/ceph/v1.0/rbd/images/V0/10234556 -u admin:d8cd98f00b204e9fdsafdsafdasf333f
curl -X DELETE xxx.xx.xx.xx/ceph/v1.0/rbd/images/cai-ceph-a3 -u admin:d8cd98f00b204e9fdsafdsafdasf333f
作者: 蔡锡生
'''

auth = HTTPBasicAuth()
application = Flask(__name__)
application.debug = True

def connect_ceph():
    cluster = rados.Rados(conffile='/etc/ceph/ceph.conf')
    cluster.connect()
    ioctx = cluster.open_ioctx('rbd')
    return ioctx

@auth.get_password
def get_password(username):
    if username == 'admin':
        return 'd8cd98f00b204e9fdsafdsafdasf333f'
    return None

@auth.error_handler
def unauthorized():
    return make_response(jsonify({'error': 'Unauthorized access'}), 401)

@application.route('/')
def index():
    return "Hello, world"

@application.route('/ceph/v1.0/rbd', methods=['GET'])
@auth.login_required
def get_rbd_list():
    ioctx = connect_ceph()
    rbd_inst = rbd.RBD()
    images = rbd_inst.list(ioctx)
    return jsonify({"code": 200, "info": images})

@application.route('/ceph/v1.0/rbd/images/<image_name>/<int:size>', methods=['POST'])
@auth.login_required
def create_volume(image_name, size):
    ioctx = connect_ceph()
    rbd_inst = rbd.RBD()
    try:
        rbd_inst.create(ioctx, image_name, size)
        return jsonify({"code": 200, "info": "create volume success"})
    except Exception as e:
        return jsonify({"code": 400, "info": "create volume failure\r\n"+e.message})

@application.route('/ceph/v1.0/rbd/images/<image_name>',methods=['DELETE'])
@auth.login_required
def delete_rbd_image(image_name):
    if image_name == '' or len(image_name) == 0:
        return jsonify({"code": 400, "info": "parameter can't be null"})
    ioctx = connect_ceph()
    print dir(rbd)
    rbd_inst = rbd.RBD()
    if image_name in rbd_inst.list(ioctx):
        try:
            time.sleep(3)
            rbd_inst.remove(ioctx, image_name)
            return jsonify({"code": 200, "info": "delete success"})
        except Exception as e:
            if e.message == 'error removing image':
                delete_rbd_image(image_name)
            return jsonify({"code": 400, "info": e.message})
    else:
        return jsonify({"code": 403, "info": "requests image_name not be exist"})

if __name__ == '__main__':
    application.run(host='0.0.0.0', port=80)

　

6.uwsgi 配置

　　vim uwsgi.ini

[uwsgi]
master=true
wsgi-file=manage.py
callable=application
socket=/opt/soft/python-ceph-api/ceph-api.sock
chmod-socket=664
processes=10
threads=4
buffer-size=32768
touch-reload=/opt/soft/python-ceph-api
module=rbd_ap

　　

7.nginx 配置

vim  /etc/nging/conf.d/ceph_api.conf

upstreamscloud_django{
	#serverunix:///path/to/your/mysite/mysite.sock;#forafilesocket
	serverunix:///opt/soft/python-ceph-api/ceph-api.sock;#forawebportsocket(we'llusethisfirst)
}

server{
	#theportyoursitewillbeservedon
	listen20000;

	#thedomainnameitwillservefor
	#server_namewww.scloud.cn;#substituteyourmachine'sIPaddressorFQDN
	charsetutf-8;

	#maxuploadsize
	client_max_body_size75M;#adjusttotaste

	#Djangomedia
	location/media{
		#alias/opt/soddft/scloud/media;#yourDjangoproject'smediafiles-amendasrequired
	}

	location/static{
		#alias/opt/soft/scloud/static;#yourDjangoproject'sstaticfiles-amendasrequired
	}

	#Finally,sendallnon-mediarequeststotheDjangoserver.
	location/{
		uwsgi_passscloud_django;
		include/etc/nginx/uwsgi_params;#theuwsgi_paramsfileyouinstalled
	}

}