Python怎样绘制Crushmap分布图，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。
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使用命令ceph report --format=json > crush.json导出json格式数据文件，之后使用pydot和graphviz实现绘图。
pip install pydot pip install graphviz
# -*- coding: utf-8 -*-
import pydot
from graphviz import Digraph
import json
import sys
class build_crushmap_graphviz():
"""
1. 使用命令ceph report --format=json > crush.json导出数据文件
2. 每种类型bucket一个颜色,不够自己去color_list里面添加,支持最多10级结构
3. 生成的文件默认问png格式,文件保存在当前目录的crushmap.png
"""
def __init__(self):
self.graph = pydot.Dot('ceph_crushmap', graph_type='digraph')
self.dot = Digraph(comment='CrushMap', node_attr={'shape': 'record', 'height': '.1'})
self.dot.graph_attr['size'] = '4096,2160'
self.dot.graph_attr['resolution'] = '100'
self.dot.graph_attr['bb'] = '0,0,4,8'
self.dot.format = 'png'
self.color_list = ["maroon", "pink", "khaki", "orange", "purple", "yellow", "cyan", "beige", "red"]
self.save_name = "crushmap"
def build(self, crushmap_file):
try:
with open(crushmap_file) as data_file:
data = json.load(data_file)
for i in range(len(data['crushmap']['devices'])):
self.dot.node(str(data['crushmap']['devices'][i]['id']),
'device: ' + data['crushmap']['devices'][i]['name'],
{'style': 'filled', 'fillcolor': 'green'})
tmp_list = []
color_dict = {}
for i in range(len(data['crushmap']['buckets'])):
if data['crushmap']['buckets'][i]['type_name'] in tmp_list:
color_ = color_dict[data['crushmap']['buckets'][i]['type_name']]
else:
tmp_list.append(data['crushmap']['buckets'][i]['type_name'])
color_ = self.color_list.pop()
color_dict[data['crushmap']['buckets'][i]['type_name']] = color_
self.dot.node(str(data['crushmap']['buckets'][i]['id']),
data['crushmap']['buckets'][i]['type_name'] + ': ' + data['crushmap']['buckets'][i]['name'],
{'style': 'filled', 'fillcolor': color_})
edges_list = []
for i in range(len(data['crushmap']['buckets'])):
for j in range(len(data['crushmap']['buckets'][i]['items'])):
self.dot.edge(str(data['crushmap']['buckets'][i]['id']),
str(data['crushmap']['buckets'][i]['items'][j]['id']))
edges_list.append(
str(data['crushmap']['buckets'][i]['id']) + str(data['crushmap']['buckets'][i]['items'][j]['id']))
self.dot.render(self.save_name)
print "Sucessful, File = {}.{}".format(self.save_name,self.dot.format)
except:
print "Faild!"
if __name__ == '__main__':
file_path = sys.argv[1]
crush_make = build_crushmap_graphviz()
crush_make.build(file_path)保存上面的脚本为build_crushmap.py，执行以下命令，成功会生成crushmap.png
user@demo$ python build_crushmap.py crush3.json Sucessful, File = crushmap.png
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