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ansible/library/system/mount

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Python
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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2012, Red Hat, inc
# Written by Seth Vidal
# based on the mount modules from salt and puppet
#
# 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 = '''
---
module: mount
short_description: Control active and configured mount points
description:
- This module controls active and configured mount points in C(/etc/fstab).
version_added: historical
options:
name:
description:
- "path to the mount point, eg: C(/mnt/files)"
required: true
default: null
aliases: []
src:
description:
- device to be mounted on I(name).
required: true
default: null
fstype:
description:
- file-system type
required: true
default: null
opts:
description:
- mount options (see fstab(8))
required: false
default: null
dump:
description:
- dump (see fstab(8))
required: false
default: null
passno:
description:
- passno (see fstab(8))
required: false
default: null
state:
description:
- If C(mounted) or C(unmounted), the device will be actively mounted or unmounted
as well as just configured in I(fstab). C(absent) and C(present) only deal with
I(fstab).
required: true
choices: [ "present", "absent", "mounted", "unmounted" ]
default: null
notes: []
requirements: []
author: Seth Vidal
'''
EXAMPLES = '''
# Mount DVD read-only
- mount: name=/mnt/dvd src=/dev/sr0 fstype=iso9660 opts=ro state=present
# Mount up device by label
- mount: name=/srv/disk src='LABEL=SOME_LABEL' state=present
# Mount up device by UUID
- mount: name=/home src='UUID=b3e48f45-f933-4c8e-a700-22a159ec9077' opts=noatime state=present
'''
def write_fstab(lines, dest):
fs_w = open(dest, 'w')
for l in lines:
fs_w.write(l)
fs_w.flush()
fs_w.close()
def set_mount(**kwargs):
""" set/change a mount point location in fstab """
# kwargs: name, src, fstype, opts, dump, passno, state, fstab=/etc/fstab
args = dict(
opts = 'defaults',
dump = '0',
passno = '0',
fstab = '/etc/fstab'
)
args.update(kwargs)
new_line = '%(src)s %(name)s %(fstype)s %(opts)s %(dump)s %(passno)s\n'
to_write = []
exists = False
changed = False
for line in open(args['fstab'], 'r').readlines():
if not line.strip():
to_write.append(line)
continue
if line.strip().startswith('#'):
to_write.append(line)
continue
if len(line.split()) != 6:
# not sure what this is or why it is here
# but it is not our fault so leave it be
to_write.append(line)
continue
ld = {}
ld['src'], ld['name'], ld['fstype'], ld['opts'], ld['dump'], ld['passno'] = line.split()
if ld['name'] != args['name']:
to_write.append(line)
continue
# it exists - now see if what we have is different
exists = True
for t in ('src', 'fstype','opts', 'dump', 'passno'):
if ld[t] != args[t]:
changed = True
ld[t] = args[t]
if changed:
to_write.append(new_line % ld)
else:
to_write.append(line)
if not exists:
to_write.append(new_line % args)
changed = True
if changed:
write_fstab(to_write, args['fstab'])
return (args['name'], changed)
def unset_mount(**kwargs):
""" remove a mount point from fstab """
# kwargs: name, src, fstype, opts, dump, passno, state, fstab=/etc/fstab
args = dict(
opts = 'default',
dump = '0',
passno = '0',
fstab = '/etc/fstab'
)
args.update(kwargs)
to_write = []
changed = False
for line in open(args['fstab'], 'r').readlines():
if not line.strip():
to_write.append(line)
continue
if line.strip().startswith('#'):
to_write.append(line)
continue
if len(line.split()) != 6:
# not sure what this is or why it is here
# but it is not our fault so leave it be
to_write.append(line)
continue
ld = {}
ld['src'], ld['name'], ld['fstype'], ld['opts'], ld['dump'], ld['passno'] = line.split()
if ld['name'] != args['name']:
to_write.append(line)
continue
# if we got here we found a match - continue and mark changed
changed = True
if changed:
write_fstab(to_write, args['fstab'])
return (args['name'], changed)
def mount(module, **kwargs):
""" mount up a path or remount if needed """
mount_bin = module.get_bin_path('mount')
name = kwargs['name']
if os.path.ismount(name):
cmd = [ mount_bin , '-o', 'remount', name ]
else:
cmd = [ mount_bin, name ]
rc, out, err = module.run_command(cmd)
if rc == 0:
return 0, ''
else:
return rc, out+err
def umount(module, **kwargs):
""" unmount a path """
umount_bin = module.get_bin_path('umount')
name = kwargs['name']
cmd = [umount_bin, name]
rc, out, err = module.run_command(cmd)
if rc == 0:
return 0, ''
else:
return rc, out+err
def main():
module = AnsibleModule(
argument_spec = dict(
state = dict(required=True, choices=['present', 'absent', 'mounted', 'unmounted']),
name = dict(required=True),
opts = dict(default=None),
passno = dict(default=None),
dump = dict(default=None),
src = dict(required=True),
fstype = dict(required=True),
fstab = dict(default=None)
)
)
changed = False
rc = 0
args = {
'name': module.params['name'],
'src': module.params['src'],
'fstype': module.params['fstype']
}
if module.params['passno'] is not None:
args['passno'] = module.params['passno']
if module.params['opts'] is not None:
args['opts'] = module.params['opts']
if ' ' in args['opts']:
module.fail_json(msg="unexpected space in 'opts' parameter")
if module.params['dump'] is not None:
args['dump'] = module.params['dump']
if module.params['fstab'] is not None:
args['fstab'] = module.params['fstab']
# absent == remove from fstab and unmounted
# unmounted == do not change fstab state, but unmount
# present == add to fstab, do not change mount state
# mounted == add to fstab if not there and make sure it is mounted, if it has changed in fstab then remount it
state = module.params['state']
name = module.params['name']
if state == 'absent':
name, changed = unset_mount(**args)
if changed:
if os.path.ismount(name):
res,msg = umount(module, **args)
if res:
module.fail_json(msg="Error unmounting %s: %s" % (name, msg))
if os.path.exists(name):
try:
os.rmdir(name)
except (OSError, IOError), e:
module.fail_json(msg="Error rmdir %s: %s" % (name, str(e)))
module.exit_json(changed=changed, **args)
if state == 'unmounted':
if os.path.ismount(name):
res,msg = umount(module, **args)
if res:
module.fail_json(msg="Error unmounting %s: %s" % (name, msg))
changed = True
module.exit_json(changed=changed, **args)
if state in ['mounted', 'present']:
name, changed = set_mount(**args)
if state == 'mounted':
if not os.path.exists(name):
try:
os.makedirs(name)
except (OSError, IOError), e:
module.fail_json(msg="Error making dir %s: %s" % (name, str(e)))
res = 0
if os.path.ismount(name):
if changed:
res,msg = mount(module, **args)
else:
changed = True
res,msg = mount(module, **args)
if res:
module.fail_json(msg="Error mounting %s: %s" % (name, msg))
module.exit_json(changed=changed, **args)
module.fail_json(msg='Unexpected position reached')
sys.exit(0)
# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()
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