mirror of https://github.com/ansible/ansible.git
Michael DeHaan
12 years ago
commit
90944ec45a
@ -0,0 +1,309 @@
|
|||||||
|
#!/usr/bin/env python
|
||||||
|
# -*- coding: utf-8 -*-
|
||||||
|
|
||||||
|
# (c) 2012, Jeroen Hoekx <jeroen@hoekx.be>
|
||||||
|
#
|
||||||
|
# This file is part of Ansible
|
||||||
|
#
|
||||||
|
# Ansible is free software: you can redistribute it and/or modify
|
||||||
|
# it under the terms of the GNU General Public License as published by
|
||||||
|
# the Free Software Foundation, either version 3 of the License, or
|
||||||
|
# (at your option) any later version.
|
||||||
|
#
|
||||||
|
# Ansible is distributed in the hope that it will be useful,
|
||||||
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
# GNU General Public License for more details.
|
||||||
|
#
|
||||||
|
# You should have received a copy of the GNU General Public License
|
||||||
|
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
|
||||||
|
DOCUMENTATION = '''
|
||||||
|
---
|
||||||
|
author: Jeroen Hoekx
|
||||||
|
module: virt_boot
|
||||||
|
short_description: Define libvirt boot parameters
|
||||||
|
description:
|
||||||
|
- "This module configures the boot order or boot media of a libvirt virtual
|
||||||
|
machine. A guest can be configured to boot from network, hard disk, floppy,
|
||||||
|
cdrom or a direct kernel boot. Specific media can be attached for cdrom,
|
||||||
|
floppy and direct kernel boot."
|
||||||
|
- This module requires the libvirt module.
|
||||||
|
version_added: "0.8"
|
||||||
|
options:
|
||||||
|
domain:
|
||||||
|
description:
|
||||||
|
- The name of the libvirt domain.
|
||||||
|
required: true
|
||||||
|
boot:
|
||||||
|
description:
|
||||||
|
- "Specify the boot order of the virtual machine. This is a comma-separated
|
||||||
|
list of: I(fd), I(hd), I(cdrom) and I(network)."
|
||||||
|
required: false
|
||||||
|
bootmenu:
|
||||||
|
description:
|
||||||
|
- Enable or disable the boot menu.
|
||||||
|
required: false
|
||||||
|
choices: [ "yes", "no" ]
|
||||||
|
kernel:
|
||||||
|
description:
|
||||||
|
- The path of the kernel to boot.
|
||||||
|
required: false
|
||||||
|
initrd:
|
||||||
|
description:
|
||||||
|
- The path of the initrd to boot.
|
||||||
|
required: false
|
||||||
|
cmdline:
|
||||||
|
description:
|
||||||
|
- The command line to boot the kernel with.
|
||||||
|
required: false
|
||||||
|
device:
|
||||||
|
default: hdc
|
||||||
|
description:
|
||||||
|
- The libvirt device name of the cdrom/floppy.
|
||||||
|
required: false
|
||||||
|
image:
|
||||||
|
description:
|
||||||
|
- The image to connect to the cdrom/floppy device.
|
||||||
|
required: false
|
||||||
|
examples:
|
||||||
|
- description: Boot from a cdrom image.
|
||||||
|
code: virt_boot domain=archrear image=/srv/rear/archrear/rear-archrear.iso boot=cdrom
|
||||||
|
- description: Boot from the local disk.
|
||||||
|
code: virt_boot domain=archrear boot=hd
|
||||||
|
- description: Boot a specific kernel with a special command line.
|
||||||
|
code: virt_boot domain=archrear kernel=$storage/kernel-archrear initrd=$storage/initramfs-archrear.img cmdline="root=/dev/ram0 vga=normal rw"
|
||||||
|
- description: Boot from the harddisk and if that fails from the network.
|
||||||
|
code: virt_boot domain=archrear boot=hd,network
|
||||||
|
- description: Enable the boot menu.
|
||||||
|
code: virt_boot domain=archrear bootmenu=yes
|
||||||
|
requirements: [ "libvirt" ]
|
||||||
|
notes:
|
||||||
|
- Run this on the libvirt host.
|
||||||
|
- I(kernel) and I(boot) are mutually exclusive.
|
||||||
|
- This module can not change a running system.
|
||||||
|
- Using direct kernel boot will always result in a I(changed) state due to libvirt internals.
|
||||||
|
'''
|
||||||
|
|
||||||
|
from xml.dom.minidom import parseString
|
||||||
|
|
||||||
|
try:
|
||||||
|
import libvirt
|
||||||
|
except ImportError:
|
||||||
|
print "failed=True msg='libvirt python module unavailable'"
|
||||||
|
sys.exit(1)
|
||||||
|
|
||||||
|
def get_domain(name):
|
||||||
|
conn = libvirt.open("qemu:///system")
|
||||||
|
domain = conn.lookupByName(name)
|
||||||
|
|
||||||
|
return domain, conn
|
||||||
|
|
||||||
|
def get_xml(domain):
|
||||||
|
domain_data = domain.XMLDesc(libvirt.VIR_DOMAIN_XML_INACTIVE)
|
||||||
|
tree = parseString(domain_data)
|
||||||
|
|
||||||
|
return tree
|
||||||
|
|
||||||
|
def write_xml(tree, conn):
|
||||||
|
conn.defineXML( tree.toxml() )
|
||||||
|
|
||||||
|
def element_text(element, data=None):
|
||||||
|
if data:
|
||||||
|
to_be_removed = []
|
||||||
|
for node in element.childNodes:
|
||||||
|
to_be_removed.append(node)
|
||||||
|
for node in to_be_removed:
|
||||||
|
element.removeChild(node)
|
||||||
|
element.appendChild( element.ownerDocument.createTextNode(data) )
|
||||||
|
if element.firstChild and element.firstChild.nodeType==element.TEXT_NODE:
|
||||||
|
return element.firstChild.data
|
||||||
|
|
||||||
|
def get_disk(tree, device):
|
||||||
|
for target in tree.getElementsByTagName('target'):
|
||||||
|
if target.getAttribute("dev") == device:
|
||||||
|
return target
|
||||||
|
|
||||||
|
def attach_disk(domain, tree, device, image):
|
||||||
|
disk = get_disk(tree, device)
|
||||||
|
if disk:
|
||||||
|
source = disk.parentNode.getElementsByTagName('source').item(0)
|
||||||
|
if source and source.getAttribute("file") == image:
|
||||||
|
return False
|
||||||
|
|
||||||
|
CDROM_TEMPLATE='''<disk type="file" device="disk">
|
||||||
|
<driver name="qemu" type="raw"/>
|
||||||
|
<source file="{path}"/>
|
||||||
|
<target bus="virtio" dev="{dev}"/>
|
||||||
|
</disk>'''
|
||||||
|
xml = CDROM_TEMPLATE.format(path=image, dev=device)
|
||||||
|
domain.updateDeviceFlags(xml, libvirt.VIR_DOMAIN_AFFECT_CONFIG)
|
||||||
|
return True
|
||||||
|
|
||||||
|
def detach_disk(domain, tree, device):
|
||||||
|
disk = get_disk(tree, device)
|
||||||
|
if disk:
|
||||||
|
source = disk.parentNode.getElementsByTagName('source').item(0)
|
||||||
|
if source and source.hasAttribute("file"):
|
||||||
|
source.removeAttribute("file")
|
||||||
|
xml = disk.parentNode.toxml()
|
||||||
|
domain.updateDeviceFlags(xml, libvirt.VIR_DOMAIN_AFFECT_CONFIG)
|
||||||
|
return True
|
||||||
|
return False
|
||||||
|
|
||||||
|
def main():
|
||||||
|
|
||||||
|
module = AnsibleModule(
|
||||||
|
argument_spec = dict(
|
||||||
|
domain=dict(required=True, aliases=['guest']),
|
||||||
|
boot=dict(),
|
||||||
|
bootmenu=dict(choices=BOOLEANS),
|
||||||
|
kernel=dict(),
|
||||||
|
initrd=dict(),
|
||||||
|
cmdline=dict(),
|
||||||
|
device=dict(default='hdc'),
|
||||||
|
image=dict(),
|
||||||
|
),
|
||||||
|
required_one_of = [['boot','kernel','image','bootmenu']],
|
||||||
|
mutually_exclusive = [['boot','kernel']]
|
||||||
|
)
|
||||||
|
|
||||||
|
params = module.params
|
||||||
|
|
||||||
|
domain_name = params['domain']
|
||||||
|
|
||||||
|
boot = params['boot']
|
||||||
|
bootmenu = module.boolean(params['bootmenu'])
|
||||||
|
kernel = params['kernel']
|
||||||
|
initrd = params['initrd']
|
||||||
|
cmdline = params['cmdline']
|
||||||
|
|
||||||
|
device = params['device']
|
||||||
|
image = params['image']
|
||||||
|
|
||||||
|
changed = False
|
||||||
|
|
||||||
|
domain, conn = get_domain(domain_name)
|
||||||
|
if domain.isActive():
|
||||||
|
module.fail_json(msg="Domain %s is still running."%(domain_name))
|
||||||
|
tree = get_xml(domain)
|
||||||
|
|
||||||
|
### Connect image
|
||||||
|
if image:
|
||||||
|
changed = changed or attach_disk(domain, tree, device, image)
|
||||||
|
if not boot and not kernel:
|
||||||
|
module.exit_json(changed=changed, image=image, device=device)
|
||||||
|
else:
|
||||||
|
changed = changed or detach_disk(domain, tree, device)
|
||||||
|
|
||||||
|
if changed:
|
||||||
|
tree = get_xml(domain)
|
||||||
|
|
||||||
|
### Boot ordering
|
||||||
|
os = tree.getElementsByTagName('os').item(0)
|
||||||
|
boot_list = os.getElementsByTagName('boot')
|
||||||
|
kernel_el = os.getElementsByTagName('kernel').item(0)
|
||||||
|
initrd_el = os.getElementsByTagName('initrd').item(0)
|
||||||
|
cmdline_el = os.getElementsByTagName('cmdline').item(0)
|
||||||
|
if boot:
|
||||||
|
if kernel_el:
|
||||||
|
changed = True
|
||||||
|
kernel_el.parentNode.removeChild(kernel_el)
|
||||||
|
if initrd_el:
|
||||||
|
changed = True
|
||||||
|
initrd_el.parentNode.removeChild(initrd_el)
|
||||||
|
if cmdline_el:
|
||||||
|
changed = True
|
||||||
|
cmdline_el.parentNode.removeChild(cmdline_el)
|
||||||
|
|
||||||
|
items = boot.split(',')
|
||||||
|
if boot_list:
|
||||||
|
needs_change = False
|
||||||
|
if len(items) == len(boot_list):
|
||||||
|
for (boot_el, dev) in zip(boot_list, items):
|
||||||
|
if boot_el.getAttribute('dev') != dev:
|
||||||
|
needs_change = True
|
||||||
|
else:
|
||||||
|
needs_change = True
|
||||||
|
|
||||||
|
if needs_change:
|
||||||
|
changed = True
|
||||||
|
to_be_removed = []
|
||||||
|
for boot_el in boot_list:
|
||||||
|
to_be_removed.append(boot_el)
|
||||||
|
for boot_el in to_be_removed:
|
||||||
|
os.removeChild(boot_el)
|
||||||
|
for item in items:
|
||||||
|
boot_el = tree.createElement('boot')
|
||||||
|
boot_el.setAttribute('dev', item)
|
||||||
|
os.appendChild(boot_el)
|
||||||
|
else:
|
||||||
|
changed = True
|
||||||
|
for item in items:
|
||||||
|
boot_el = tree.createElement('boot')
|
||||||
|
boot_el.setAttribute('dev', item)
|
||||||
|
os.appendChild(boot_el)
|
||||||
|
|
||||||
|
elif kernel:
|
||||||
|
if boot_list:
|
||||||
|
changed = True
|
||||||
|
to_be_removed = []
|
||||||
|
for boot_el in boot_list:
|
||||||
|
to_be_removed.append(boot_el)
|
||||||
|
for boot_el in to_be_removed:
|
||||||
|
os.removeChild(boot_el)
|
||||||
|
if kernel_el:
|
||||||
|
if element_text(kernel_el) != kernel:
|
||||||
|
changed = True
|
||||||
|
element_text(kernel_el, kernel)
|
||||||
|
else:
|
||||||
|
changed = True
|
||||||
|
kernel_el = tree.createElement('kernel')
|
||||||
|
kernel_el.appendChild( tree.createTextNode(kernel) )
|
||||||
|
os.appendChild(kernel_el)
|
||||||
|
|
||||||
|
if initrd_el:
|
||||||
|
if element_text(initrd_el) != initrd:
|
||||||
|
changed = True
|
||||||
|
element_text(initrd_el, initrd)
|
||||||
|
else:
|
||||||
|
changed = True
|
||||||
|
initrd_el = tree.createElement('initrd')
|
||||||
|
initrd_el.appendChild( tree.createTextNode(initrd) )
|
||||||
|
os.appendChild(initrd_el)
|
||||||
|
|
||||||
|
if cmdline_el:
|
||||||
|
if element_text(cmdline_el) != cmdline:
|
||||||
|
changed = True
|
||||||
|
element_text(cmdline_el, cmdline)
|
||||||
|
else:
|
||||||
|
changed = True
|
||||||
|
cmdline_el = tree.createElement('cmdline')
|
||||||
|
cmdline_el.appendChild( tree.createTextNode(cmdline) )
|
||||||
|
os.appendChild(cmdline_el)
|
||||||
|
|
||||||
|
### Enable/disable bootmenu
|
||||||
|
bootmenu_state = tree.getElementsByTagName('bootmenu').item(0)
|
||||||
|
if bootmenu and bootmenu_state:
|
||||||
|
bootmenu_enabled = bootmenu_state.getAttribute('enable')
|
||||||
|
if bootmenu_enabled != 'yes':
|
||||||
|
changed = True
|
||||||
|
bootmenu_state.setAttribute('enable', 'yes')
|
||||||
|
elif bootmenu:
|
||||||
|
os = tree.getElementsByTagName('os').item(0)
|
||||||
|
bootmenu_state = tree.createElement('bootmenu')
|
||||||
|
bootmenu_state.setAttribute('enable', 'yes')
|
||||||
|
changed = True
|
||||||
|
os.appendChild(bootmenu_state)
|
||||||
|
elif bootmenu_state:
|
||||||
|
bootmenu_state.parentNode.removeChild(bootmenu_state)
|
||||||
|
changed = True
|
||||||
|
|
||||||
|
### save back
|
||||||
|
write_xml(tree, conn)
|
||||||
|
|
||||||
|
module.exit_json(changed=changed)
|
||||||
|
|
||||||
|
# this is magic, see lib/ansible/module_common.py
|
||||||
|
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
|
||||||
|
main()
|
||||||
Loading…
Reference in New Issue