12:34 p.m.
From: Royce Lv <lvroyce(a)linux.vnet.ibm.com>
Abstract a helper function to parse cmd result.
Usage:
(1)get cmd result with subprocess.call or subprocess.Popen
(2) call pass_cmd_output to get formated outputs
Example:
blkid = subprocess.Popen(["cat", "/proc/mounts"],
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
outs = blkid.communicate()[0]
output_items= ['path', 'mnt_point', 'type', 'option']
utils.parse_cmd_output(outs, output_items)
Sample output:
[{'path': '/dev/sda8', 'type': 'ext4',
'option': 'rw,relatime,data=ordered', 'mnt_point':
'/home'},
{'path': 'localhost:/home/royce/isorepo', 'type':
'nfs4',
'option': 'rw...addr=127.0.0.1', 'mnt_point':
'/mnt'}]
To prevent future mount of nfs path will hang,
we will try nfs path with a quick mount,
if this check fails, report warning to user.
Signed-off-by: Royce Lv <lvroyce(a)linux.vnet.ibm.com>
---
src/kimchi/utils.py | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/src/kimchi/utils.py b/src/kimchi/utils.py
index f7eda93..14b9c8a 100644
--- a/src/kimchi/utils.py
+++ b/src/kimchi/utils.py
@@ -22,6 +22,9 @@
#
import cherrypy
+import subprocess
+import tempfile
+import threading
import os
@@ -84,3 +87,38 @@ def import_class(class_path):
def import_module(module_name):
return __import__(module_name, fromlist=[''])
+
+def parse_cmd_output(output, output_items):
+ res = []
+ for line in output.split("\n"):
+ res.append(dict(zip(output_items, line.split())))
+
+ return res
+
+def check_nfs_export(export_path):
+ res = False
+ outputs = None
+ mnt_point = tempfile.mkdtemp(dir='/tmp')
+ cmd = ["mount", "-o",
'soft,timeo=100,retrans=3,retry=0',
+ export_path, mnt_point]
+ proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE)
+ thread = threading.Thread(target = proc.communicate)
+ thread.start()
+ thread.join(30)
+
+ if thread.is_alive():
+ proc.kill()
+ thread.join()
+
+ with open("/proc/mounts" , "rb") as f:
+ outputs = f.read()
+ output_items = ['dev_path', 'mnt_point', 'type']
+ mounts = parse_cmd_output(outputs, output_items)
+ for item in mounts:
+ if 'dev_path' in item and item['dev_path'] == export_path:
+ res = True
+ cmd = ["umount", "-f", export_path]
+ subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+
+ return res
--
1.8.1.2
--
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