961d4b0d6c
This avoids a stale situation where name/path contains some impossible path, but gets configured (faultly) in fstab, and the module only fails after that, when creating that path.
338 lines
9.8 KiB
Python
Executable file
338 lines
9.8 KiB
Python
Executable file
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# (c) 2012, Red Hat, inc
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# Written by Seth Vidal
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# based on the mount modules from salt and puppet
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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DOCUMENTATION = '''
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---
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module: mount
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short_description: Control active and configured mount points
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description:
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- This module controls active and configured mount points in C(/etc/fstab).
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version_added: "0.6"
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options:
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name:
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description:
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- "path to the mount point, eg: C(/mnt/files)"
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required: true
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default: null
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aliases: []
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src:
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description:
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- device to be mounted on I(name).
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required: true
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default: null
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fstype:
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description:
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- file-system type
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required: true
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default: null
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opts:
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description:
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- mount options (see fstab(8))
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required: false
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default: null
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dump:
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description:
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- dump (see fstab(8))
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required: false
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default: null
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passno:
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description:
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- passno (see fstab(8))
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required: false
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default: null
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state:
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description:
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- If C(mounted) or C(unmounted), the device will be actively mounted or unmounted
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as needed and appropriately configured in I(fstab).
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C(absent) and C(present) only deal with
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I(fstab) but will not affect current mounting. If specifying C(mounted) and the mount
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point is not present, the mount point will be created. Similarly, specifying C(absent) will remove the mount point directory.
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required: true
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choices: [ "present", "absent", "mounted", "unmounted" ]
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default: null
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fstab:
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description:
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- file to use instead of C(/etc/fstab). You shouldn't use that option
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unless you really know what you are doing. This might be useful if
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you need to configure mountpoints in a chroot environment.
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required: false
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default: /etc/fstab
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notes: []
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requirements: []
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author: Seth Vidal
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'''
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EXAMPLES = '''
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# Mount DVD read-only
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- mount: name=/mnt/dvd src=/dev/sr0 fstype=iso9660 opts=ro state=present
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# Mount up device by label
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- mount: name=/srv/disk src='LABEL=SOME_LABEL' fstype=ext4 state=present
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# Mount up device by UUID
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- mount: name=/home src='UUID=b3e48f45-f933-4c8e-a700-22a159ec9077' fstype=xfs opts=noatime state=present
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'''
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def write_fstab(lines, dest):
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fs_w = open(dest, 'w')
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for l in lines:
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fs_w.write(l)
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fs_w.flush()
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fs_w.close()
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def set_mount(**kwargs):
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""" set/change a mount point location in fstab """
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# kwargs: name, src, fstype, opts, dump, passno, state, fstab=/etc/fstab
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args = dict(
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opts = 'defaults',
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dump = '0',
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passno = '0',
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fstab = '/etc/fstab'
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)
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args.update(kwargs)
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new_line = '%(src)s %(name)s %(fstype)s %(opts)s %(dump)s %(passno)s\n'
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to_write = []
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exists = False
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changed = False
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for line in open(args['fstab'], 'r').readlines():
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if not line.strip():
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to_write.append(line)
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continue
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if line.strip().startswith('#'):
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to_write.append(line)
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continue
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if len(line.split()) != 6:
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# not sure what this is or why it is here
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# but it is not our fault so leave it be
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to_write.append(line)
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continue
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ld = {}
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ld['src'], ld['name'], ld['fstype'], ld['opts'], ld['dump'], ld['passno'] = line.split()
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if ld['name'] != args['name']:
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to_write.append(line)
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continue
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# it exists - now see if what we have is different
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exists = True
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for t in ('src', 'fstype','opts', 'dump', 'passno'):
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if ld[t] != args[t]:
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changed = True
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ld[t] = args[t]
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if changed:
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to_write.append(new_line % ld)
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else:
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to_write.append(line)
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if not exists:
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to_write.append(new_line % args)
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changed = True
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if changed:
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write_fstab(to_write, args['fstab'])
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return (args['name'], changed)
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def unset_mount(**kwargs):
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""" remove a mount point from fstab """
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# kwargs: name, src, fstype, opts, dump, passno, state, fstab=/etc/fstab
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args = dict(
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opts = 'default',
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dump = '0',
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passno = '0',
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fstab = '/etc/fstab'
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)
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args.update(kwargs)
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to_write = []
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changed = False
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for line in open(args['fstab'], 'r').readlines():
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if not line.strip():
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to_write.append(line)
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continue
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if line.strip().startswith('#'):
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to_write.append(line)
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continue
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if len(line.split()) != 6:
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# not sure what this is or why it is here
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# but it is not our fault so leave it be
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to_write.append(line)
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continue
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ld = {}
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ld['src'], ld['name'], ld['fstype'], ld['opts'], ld['dump'], ld['passno'] = line.split()
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if ld['name'] != args['name']:
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to_write.append(line)
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continue
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# if we got here we found a match - continue and mark changed
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changed = True
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if changed:
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write_fstab(to_write, args['fstab'])
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return (args['name'], changed)
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def mount(module, **kwargs):
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""" mount up a path or remount if needed """
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mount_bin = module.get_bin_path('mount')
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name = kwargs['name']
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if os.path.ismount(name):
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cmd = [ mount_bin , '-o', 'remount', name ]
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else:
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cmd = [ mount_bin, name ]
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rc, out, err = module.run_command(cmd)
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if rc == 0:
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return 0, ''
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else:
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return rc, out+err
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def umount(module, **kwargs):
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""" unmount a path """
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umount_bin = module.get_bin_path('umount')
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name = kwargs['name']
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cmd = [umount_bin, name]
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rc, out, err = module.run_command(cmd)
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if rc == 0:
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return 0, ''
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else:
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return rc, out+err
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def main():
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module = AnsibleModule(
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argument_spec = dict(
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state = dict(required=True, choices=['present', 'absent', 'mounted', 'unmounted']),
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name = dict(required=True),
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opts = dict(default=None),
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passno = dict(default=None),
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dump = dict(default=None),
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src = dict(required=True),
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fstype = dict(required=True),
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fstab = dict(default='/etc/fstab')
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)
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)
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changed = False
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rc = 0
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args = {
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'name': module.params['name'],
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'src': module.params['src'],
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'fstype': module.params['fstype']
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}
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if module.params['passno'] is not None:
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args['passno'] = module.params['passno']
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if module.params['opts'] is not None:
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args['opts'] = module.params['opts']
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if ' ' in args['opts']:
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module.fail_json(msg="unexpected space in 'opts' parameter")
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if module.params['dump'] is not None:
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args['dump'] = module.params['dump']
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if module.params['fstab'] is not None:
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args['fstab'] = module.params['fstab']
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# if fstab file does not exist, we first need to create it. This mainly
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# happens when fstab optin is passed to the module.
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if not os.path.exists(args['fstab']):
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if not os.path.exists(os.path.dirname(args['fstab'])):
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os.makedirs(os.path.dirname(args['fstab']))
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open(args['fstab'],'a').close()
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# absent == remove from fstab and unmounted
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# unmounted == do not change fstab state, but unmount
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# present == add to fstab, do not change mount state
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# mounted == add to fstab if not there and make sure it is mounted, if it has changed in fstab then remount it
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state = module.params['state']
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name = module.params['name']
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if state == 'absent':
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name, changed = unset_mount(**args)
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if changed:
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if os.path.ismount(name):
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res,msg = umount(module, **args)
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if res:
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module.fail_json(msg="Error unmounting %s: %s" % (name, msg))
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if os.path.exists(name):
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try:
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os.rmdir(name)
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except (OSError, IOError), e:
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module.fail_json(msg="Error rmdir %s: %s" % (name, str(e)))
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module.exit_json(changed=changed, **args)
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if state == 'unmounted':
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if os.path.ismount(name):
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res,msg = umount(module, **args)
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if res:
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module.fail_json(msg="Error unmounting %s: %s" % (name, msg))
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changed = True
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module.exit_json(changed=changed, **args)
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if state in ['mounted', 'present']:
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if state == 'mounted':
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if not os.path.exists(name):
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try:
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os.makedirs(name)
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except (OSError, IOError), e:
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module.fail_json(msg="Error making dir %s: %s" % (name, str(e)))
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name, changed = set_mount(**args)
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if state == 'mounted':
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res = 0
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if os.path.ismount(name):
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if changed:
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res,msg = mount(module, **args)
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else:
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changed = True
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res,msg = mount(module, **args)
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if res:
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module.fail_json(msg="Error mounting %s: %s" % (name, msg))
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module.exit_json(changed=changed, **args)
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module.fail_json(msg='Unexpected position reached')
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sys.exit(0)
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# import module snippets
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from ansible.module_utils.basic import *
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main()
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