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#
# Author:: Joshua Timberman (<joshua@chef.io>)
# Author:: Lamont Granquist (<lamont@chef.io>)
# Copyright:: Copyright (c) Chef Software 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.
#
require_relative "../log"
require_relative "../mixin/shell_out"
require_relative "../provider"
class Chef
class Provider
class Mount < Chef::Provider
include Chef::Mixin::ShellOut
attr_accessor :unmount_retries
def load_current_resource
true
end
def initialize(new_resource, run_context)
super
self.unmount_retries = 20
end
action :mount do
unless current_resource.mounted
converge_by("mount #{current_resource.device} to #{current_resource.mount_point}") do
mount_fs
logger.info("#{new_resource} mounted")
end
else
logger.trace("#{new_resource} is already mounted")
end
end
action :umount do
if current_resource.mounted
converge_by("unmount #{current_resource.device}") do
umount_fs
logger.info("#{new_resource} unmounted")
end
else
logger.trace("#{new_resource} is already unmounted")
end
end
action :remount do
if current_resource.mounted
if new_resource.supports[:remount]
converge_by("remount #{current_resource.device}") do
remount_fs
logger.info("#{new_resource} remounted")
end
else
converge_by("unmount #{current_resource.device}") do
umount_fs
logger.info("#{new_resource} unmounted")
end
wait_until_unmounted(unmount_retries)
converge_by("mount #{current_resource.device}") do
mount_fs
logger.info("#{new_resource} mounted")
end
end
else
logger.trace("#{new_resource} not mounted, nothing to remount")
end
end
action :enable do
unless current_resource.enabled && mount_options_unchanged? && device_unchanged?
converge_by("enable #{current_resource.device}") do
enable_fs
logger.info("#{new_resource} enabled")
end
else
logger.trace("#{new_resource} already enabled")
end
end
action :disable do
if current_resource.enabled
converge_by("disable #{current_resource.device}") do
disable_fs
logger.info("#{new_resource} disabled")
end
else
logger.trace("#{new_resource} already disabled")
end
end
alias :action_unmount :action_umount
#
# Abstract Methods to be implemented by subclasses
#
# should actually check if the filesystem is mounted (not just return current_resource) and return true/false
def mounted?
raise Chef::Exceptions::UnsupportedAction, "#{self} does not implement #mounted?"
end
# should check new_resource against current_resource to see if mount options need updating, returns true/false
def mount_options_unchanged?
raise Chef::Exceptions::UnsupportedAction, "#{self} does not implement #mount_options_unchanged?"
end
# It's entirely plausible that a site might prefer UUIDs or labels, so
# we need to be able to update fstab to conform with their wishes
# without necessarily needing to remount the device.
# See #6851 for more.
def device_unchanged?
@current_resource.device == @new_resource.device
end
#
# NOTE: for the following methods, this superclass will already have checked if the filesystem is
# enabled and/or mounted and they will be called in converge_by blocks, so most defensive checking
# does not need to be done in the subclass implementation -- just do the thing.
#
# should implement mounting of the filesystem, raises if action does not succeed
def mount_fs
raise Chef::Exceptions::UnsupportedAction, "#{self} does not support :mount"
end
# should implement unmounting of the filesystem, raises if action does not succeed
def umount_fs
raise Chef::Exceptions::UnsupportedAction, "#{self} does not support :umount"
end
# should implement remounting of the filesystem (via a -o remount or some other atomic-ish action that isn't
# simply a umount/mount style remount), raises if action does not succeed
def remount_fs
raise Chef::Exceptions::UnsupportedAction, "#{self} does not support :remount"
end
# should implement enabling of the filesystem (e.g. in /etc/fstab), raises if action does not succeed
def enable_fs
raise Chef::Exceptions::UnsupportedAction, "#{self} does not support :enable"
end
# should implement disabling of the filesystem (e.g. in /etc/fstab), raises if action does not succeed
def disable_fs
raise Chef::Exceptions::UnsupportedAction, "#{self} does not support :disable"
end
private
def wait_until_unmounted(tries)
while mounted?
if (tries -= 1) < 0
raise Chef::Exceptions::Mount, "Retries exceeded waiting for filesystem to unmount"
end
sleep 0.1
end
end
end
end
end
|
