Created export volume info (markdown)

export-volume-info.md

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+Sometime we may lose the replication of some volumes (disk failure or any other exception), this small script can help u dump all volumes info to csv files, and use your favorite tools to find the 'bad' volumes.
+
+
+```python
+import requests
+from bs4 import BeautifulSoup
+import json
+
+out = file('out.csv', 'w')
+
+// your weed master url 
+url = 'http://192.64.4.35:9333/'   
+
+
+s = requests.session()
+res = s.get(url)
+if res.status_code == 200:
+    soup = BeautifulSoup(res.content, 'html.parser')
+    for link in soup.find_all("a"):
+        if 'index.html' not in link['href']:
+            continue
+        # print link['href']
+        res = s.get(link['href'])
+        if res.status_code == 200:
+            soup = BeautifulSoup(res.content, 'html.parser')
+            for volume in soup.find('tbody').find_all('tr'):
+                rows = volume.find_all('td')
+                // use any of your weed node, I deploy openresty before my weed cluster 
+                res = s.get("http://192.xxx.xx.xx/dir/lookup?volumeId=%s&pretty=y" % rows[0].text)
+                result = [a.text for a in rows[:2]]
+                if res.status_code == 200:
+                    json_data = res.json()
+                    if 'locations' in json_data:
+                        result.append(json.dumps(json_data['locations']))
+
+                    dataline = ",".join(result)
+                    print link['href'] + "," + dataline
+                    out.write(link['href'] + "," + dataline)
+                    out.write("\n")
+```