From 4faa7f927149a5c4ef7a03523f7bc14523cb9baa Mon Sep 17 00:00:00 2001
From: Stuart Mackie <wsmackie@juniper.net>
Date: Fri, 7 Oct 2016 12:24:58 -0700
Subject: Charms for Contrail 3.1 with Mitaka

Change-Id: Id37f3b9743d1974e31fcd7cd9c54be41bb0c47fb
Signed-off-by: Stuart Mackie <wsmackie@juniper.net>
---
 .../hooks/charmhelpers/core/kernel.py              | 66 ++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 charms/trusty/ceilometer-agent/hooks/charmhelpers/core/kernel.py

(limited to 'charms/trusty/ceilometer-agent/hooks/charmhelpers/core/kernel.py')

diff --git a/charms/trusty/ceilometer-agent/hooks/charmhelpers/core/kernel.py b/charms/trusty/ceilometer-agent/hooks/charmhelpers/core/kernel.py
new file mode 100644
index 0000000..b166efe
--- /dev/null
+++ b/charms/trusty/ceilometer-agent/hooks/charmhelpers/core/kernel.py
@@ -0,0 +1,66 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Copyright 2014-2015 Canonical Limited.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+__author__ = "Jorge Niedbalski <jorge.niedbalski@canonical.com>"
+
+from charmhelpers.core.hookenv import (
+    log,
+    INFO
+)
+
+from subprocess import check_call, check_output
+import re
+
+
+def modprobe(module, persist=True):
+    """Load a kernel module and configure for auto-load on reboot."""
+    cmd = ['modprobe', module]
+
+    log('Loading kernel module %s' % module, level=INFO)
+
+    check_call(cmd)
+    if persist:
+        with open('/etc/modules', 'r+') as modules:
+            if module not in modules.read():
+                modules.write(module)
+
+
+def rmmod(module, force=False):
+    """Remove a module from the linux kernel"""
+    cmd = ['rmmod']
+    if force:
+        cmd.append('-f')
+    cmd.append(module)
+    log('Removing kernel module %s' % module, level=INFO)
+    return check_call(cmd)
+
+
+def lsmod():
+    """Shows what kernel modules are currently loaded"""
+    return check_output(['lsmod'],
+                        universal_newlines=True)
+
+
+def is_module_loaded(module):
+    """Checks if a kernel module is already loaded"""
+    matches = re.findall('^%s[ ]+' % module, lsmod(), re.M)
+    return len(matches) > 0
+
+
+def update_initramfs(version='all'):
+    """Updates an initramfs image"""
+    return check_call(["update-initramfs", "-k", version, "-u"])
-- 
cgit 1.2.3-korg