blob: 39c1f846443bcd99678bb4dc66deb614933418f4 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
#
# Author:: Thom May (<thom@clearairturbulence.org>)
# Copyright:: Copyright (c) 2009 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# 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.
#
Ohai.plugin(:Virtualization) do
provides "virtualization"
collect_data(:linux) do
virtualization Mash.new
# if it is possible to detect paravirt vs hardware virt, it should be put in
# virtualization[:mechanism]
## Xen
# /proc/xen is an empty dir for EL6 + Linode Guests
if File.exists?("/proc/xen")
virtualization[:system] = "xen"
# Assume guest
virtualization[:role] = "guest"
# This file should exist on most Xen systems, normally empty for guests
if File.exists?("/proc/xen/capabilities")
if File.read("/proc/xen/capabilities") =~ /control_d/i
virtualization[:role] = "host"
end
end
end
# Xen Notes:
# - cpuid of guests, if we could get it, would also be a clue
# - may be able to determine if under paravirt from /dev/xen/evtchn (See OHAI-253)
# - EL6 guests carry a 'hypervisor' cpu flag
# - Additional edge cases likely should not change the above assumptions
# but rather be additive - btm
# Detect from kernel module
if File.exists?("/proc/modules")
modules = File.read("/proc/modules")
if modules =~ /^kvm/
virtualization[:system] = "kvm"
virtualization[:role] = "host"
elsif modules =~ /^vboxdrv/
virtualization[:system] = "vbox"
virtualization[:role] = "host"
end
end
# Detect KVM/QEMU from cpuinfo, report as KVM
# We could pick KVM from 'Booting paravirtualized kernel on KVM' in dmesg
# 2.6.27-9-server (intrepid) has this / 2.6.18-6-amd64 (etch) does not
# It would be great if we could read pv_info in the kernel
# Wait for reply to: http://article.gmane.org/gmane.comp.emulators.kvm.devel/27885
if File.exists?("/proc/cpuinfo")
if File.read("/proc/cpuinfo") =~ /QEMU Virtual CPU|Common KVM processor|Common 32-bit KVM processor/
virtualization[:system] = "kvm"
virtualization[:role] = "guest"
end
end
# Detect OpenVZ / Virtuozzo.
# http://wiki.openvz.org/BC_proc_entries
if File.exists?("/proc/bc/0")
virtualization[:system] = "openvz"
virtualization[:role] = "host"
elsif File.exists?("/proc/vz")
virtualization[:system] = "openvz"
virtualization[:role] = "guest"
end
# http://www.dmo.ca/blog/detecting-virtualization-on-linux
if File.exists?("/usr/sbin/dmidecode")
so = shell_out("dmidecode")
case so.stdout
when /Manufacturer: Microsoft/
if so.stdout =~ /Product Name: Virtual Machine/
virtualization[:system] = "virtualpc"
virtualization[:role] = "guest"
end
when /Manufacturer: VMware/
if so.stdout =~ /Product Name: VMware Virtual Platform/
virtualization[:system] = "vmware"
virtualization[:role] = "guest"
end
when /Manufacturer: Xen/
if so.stdout =~ /Product Name: HVM domU/
virtualization[:system] = "xen"
virtualization[:role] = "guest"
end
when /Manufacturer: Oracle Corporation/
if so.stdout =~ /Product Name: VirtualBox/
virtualization[:system] = "vbox"
virtualization[:role] = "guest"
end
else
nil
end
end
# Detect Linux-VServer
if File.exists?("/proc/self/status")
proc_self_status = File.read("/proc/self/status")
vxid = proc_self_status.match(/^(s_context|VxID): (\d+)$/)
if vxid and vxid[2]
virtualization[:system] = "linux-vserver"
if vxid[2] == "0"
virtualization[:role] = "host"
else
virtualization[:role] = "guest"
end
end
end
end
end
|
