From: Scott Baker <smbaker@gmail.com>
Date: Wed, 16 Oct 2013 06:39:23 +0000 (-0700)
Subject: automatically touch slices with lxcsu if vsys_sysctl attribute changes
X-Git-Tag: nodemanager-5.2-9~5
X-Git-Url: http://git.onelab.eu/?p=nodemanager.git;a=commitdiff_plain;h=63e92906c99bb95dd26b7f38dbfe443d53e3dad9

automatically touch slices with lxcsu if vsys_sysctl attribute changes
---

diff --git a/plugins/vsys_sysctl.py b/plugins/vsys_sysctl.py
new file mode 100644
index 0000000..3539ab1
--- /dev/null
+++ b/plugins/vsys_sysctl.py
@@ -0,0 +1,60 @@
+""" vsys_sysctl
+
+    Touches a slice with lxcsu if it has vsys_sysctl attributes
+"""
+
+import logger
+import os
+
+def start():
+    logger.log("vsys_sysctl: plugin starting up...")
+
+def GetSlivers(data, config=None, plc=None):
+    """For each sliver with the vsys attribute, set the script ACL, create the vsys directory in the slice, and restart vsys."""
+
+    if 'slivers' not in data:
+        logger.log_missing_data("vsys.GetSlivers",'slivers')
+        return
+
+    slices = []
+
+    for sliver in data['slivers']:
+        slicename = sliver["name"]
+        for attribute in sliver['attributes']:
+            if attribute['tagname'].startswith('vsys_sysctl.'):
+                dir = "/vservers/%s/vsys_sysctl" % slicename
+                if not os.path.exists(dir):
+                    try:
+                        logger.log("vsys_sysctl: create dir %s" % dir)
+                        os.mkdir(dir)
+                    except:
+                        logger.log("vsys_sysctl: failed to create dir %s" % dir)
+
+                (junk, key) = attribute['tagname'].split(".",1)
+                value = str(attribute['value'])
+
+                fn = os.path.join(dir, key)
+                if not test_value(fn, value):
+                    # All we need to do to make vsys_sysctl work is to lxcsu
+                    # into the slice and do anything.
+                    result = os.system("lxcsu -r %s :" % slicename)
+                    if result != 0:
+                        logger.log("vsys_sysctl: failed to lxcsu into %s" % slicename)
+                        continue
+
+                    # Store the key name and value inside of /vsys_sysctl in the
+                    # slice. This lets us know that we've done the sysctl.
+                    try:
+                        logger.log("vsys_sysctl: create file %s value %s" % (fn, value))
+                        file(fn,"w").write(value+"\n")
+                    except:
+                        logger.log("vsys_sysctl: failed to create file %s" % fn)
+
+def test_value(fn, value):
+    try:
+        slice_value = file(fn,"r").readline().strip()
+    except:
+        slice_value = None
+
+    return (value == slice_value)
+