mirror of
https://github.com/psy0rz/zfs_autobackup.git
synced 2025-04-11 22:40:01 +03:00
blah
This commit is contained in:
Edwin Eefting
parent
cae8ec3e70
commit
765dbf124a
653
zfs_autobackup
653
zfs_autobackup
@ -7,7 +7,7 @@ import re
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import traceback
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import subprocess
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import pprint
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import cStringIO
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# import cStringIO
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import time
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@ -23,7 +23,53 @@ def debug(txt):
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print(txt)
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class ZfsNode:
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class TreeNode():
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"""generic tree implementation, with parent/child and prev/next relations"""
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def __init__(self, name, parent=None, next=None, prev=None, *args, **kwargs):
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self.childs={}
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self.name=name
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self.parent=parent
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if parent:
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if name in parent.childs:
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raise(Exception("parent {} already has child {}").format(parent.name, name))
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parent.childs[name]=self
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self.next=next
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if next:
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if next.prev:
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raise(Exception("{} already has a previous item").format(next.name))
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next.prev=self
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self.prev=prev
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if prev:
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if prev.next:
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raise(Exception("{} already has a next item").format(prev.name))
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prev.next=self
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def remove(self):
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"""remove the item from other referenced TreeNodes. call before you actually delete a treeobject"""
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if self.parent:
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self.parent.childs.remove(self.name)
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# let previous and next objects point to eachother
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if self.next:
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self.next.prev=self.prev
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if self.prev:
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self.prev.next=self.next
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self.parent=None
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self.next=None
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self.prev=None
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class ZfsNode(TreeNode):
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"""an endpoint that contains zfs filesystems.
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contains lowlevel zfs wrappers for actual zfs commands on remote nodes via ssh (or local)
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@ -31,8 +77,10 @@ class ZfsNode:
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methods only accept and return simple dataset names, just like the real commands
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"""
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def __init__(self, ssh_to):
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def __init__(self, ssh_to, *args, **kwargs):
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"""ssh_to: server you want to ssh to. specify 'local' to just use local commands without ssh"""
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super().__init__(*args, **kwargs)
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self.ssh_to=ssh_to
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@ -44,10 +92,6 @@ class ZfsNode:
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#use ssh?
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if self.ssh_to != "local":
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encoded_cmd.extend(["ssh", self.ssh_to])
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if args.ssh_cipher:
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encoded_cmd.extend(["-c", args.ssh_cipher])
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if args.compress:
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encoded_cmd.append("-C")
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#make sure the command gets all the data in utf8 format:
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#(this is neccesary if LC_ALL=en_US.utf8 is not set in the environment)
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@ -92,321 +136,20 @@ class ZfsNode:
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return(ret)
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def zfs_get_selected_filesystems():
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"""determine filesystems that should be backupped by looking at the special autobackup-property
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return: list with dataset names
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"""
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#get all source filesystems that have the backup property
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source_filesystems=self.run(tab_split=True, cmd=[
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"zfs", "get", "-t", "volume,filesystem", "-o", "name,value,source", "-s", "local,inherited", "-H", "autobackup:"+args.backup_name
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])
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class ZfsPool(TreeNode):
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"""a zfs pool"""
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def __init__(self, *kwargs, **args):
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super().__init(*args, **kwargs)
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#determine filesystems that should be actually backupped
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selected_filesystems=[]
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direct_filesystems=[]
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for source_filesystem in source_filesystems:
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(name,value,source)=source_filesystem
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if value=="false":
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verbose("Ignoring: {0} (disabled)".format(name))
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else:
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if source=="local":
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selected_filesystems.append(name)
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direct_filesystems.append(name)
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verbose("Selected: {0} (direct selection)".format(name))
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elif source.find("inherited from ")==0:
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inherited_from=re.sub("^inherited from ", "", source)
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if inherited_from in direct_filesystems:
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selected_filesystems.append(name)
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verbose("Selected: {0} (inherited selection)".format(name))
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else:
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verbose("Ignored: {0} (already a backup)".format(name))
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else:
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vebose("Ignored: {0} ({0})".format(source))
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return(selected_filesystems)
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def zfs_get_resumable_filesystems(filesystems):
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"""determine filesystems that can be resumed via receive_resume_token (should be executed on target)"""
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cmd=[ "zfs", "get", "-t", "volume,filesystem", "-o", "name,value", "-H", "receive_resume_token" ]
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cmd.extend(filesystems)
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resumable_filesystems=self.run(tab_split=True, cmd=cmd)
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ret={}
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for (resumable_filesystem,token) in resumable_filesystems:
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if token!='-':
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ret[resumable_filesystem]=token
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return(ret)
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def zfs_destroy_snapshots(snapshots):
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"""deferred destroy list of snapshots (in @format). """
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#zfs can only destroy one filesystem at once so we use xargs and stdin
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self.run(test=args.test, input="\0".join(snapshots), cmd=
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[ "xargs", "-0", "-n", "1", "zfs", "destroy", "-d" ]
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)
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def zfs_destroy(filesystems, recursive=False):
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"""destroy list of filesystems """
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cmd=[ "xargs", "-0", "-n", "1", "zfs", "destroy" ]
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if recursive:
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cmd.append("-r")
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#zfs can only destroy one filesystem at once so we use xargs and stdin
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self.run(test=args.test, input="\0".join(filesystems), cmd=cmd)
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#simulate snapshots for --test option
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#FIXME
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test_snapshots={}
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def zfs_create_snapshot(filesystems, snapshot):
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"""create snapshot on multiple filesystems at once (atomicly)"""
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cmd=[ "zfs", "snapshot" ]
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for filesystem in filesystems:
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cmd.append(filesystem+"@"+snapshot)
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#in testmode we dont actually make changes, so keep them in a list to simulate
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if args.test:
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if not filesystem in test_snapshots:
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test_snapshots[filesystem]=[]
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test_snapshots[filesystem].append(snapshot)
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run(ssh_to=ssh_to, tab_split=False, cmd=cmd, test=args.test)
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def zfs_get_snapshots(filesystems):
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"""get names of all snapshots for specified filesystems belonging to backup_name
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return[filesystem_name]=[ "snashot1", "snapshot2", ... ]
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"""
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ret={}
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if filesystems:
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#TODO: get rid of ugly errors for non-existing target filesystems
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cmd=[
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"zfs", "list", "-d", "1", "-r", "-t" ,"snapshot", "-H", "-o", "name"
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]
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cmd.extend(filesystems)
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snapshots=run(ssh_to=ssh_to, tab_split=False, cmd=cmd, valid_exitcodes=[ 0,1 ])
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for snapshot in snapshots:
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(filesystem, snapshot_name)=snapshot.split("@")
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if re.match("^"+backup_name+"-[0-9]*$", snapshot_name):
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if not filesystem in ret:
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ret[filesystem]=[]
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ret[filesystem].append(snapshot_name)
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#also add any test-snapshots that where created with --test mode
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if args.test:
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if ssh_to in test_snapshots:
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for filesystem in filesystems:
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if filesystem in test_snapshots[ssh_to]:
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if not filesystem in ret:
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ret[filesystem]=[]
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ret[filesystem].extend(test_snapshots[ssh_to][filesystem])
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return(ret)
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"""transfer a zfs snapshot from source to target. both can be either local or via ssh.
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TODO:
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buffering: specify buffer_size to use mbuffer (or alike) to apply buffering where neccesary
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local to local:
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local send -> local buffer -> local receive
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local to remote and remote to local:
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local send -> local buffer -> ssh -> remote buffer -> remote receive
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remote send -> remote buffer -> ssh -> local buffer -> local receive
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remote to remote:
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remote send -> remote buffer -> ssh -> local buffer -> ssh -> remote buffer -> remote receive
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TODO: can we string together all the zfs sends and recvs, so that we only need to use 1 ssh connection? should be faster if there are many small snaphots
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"""
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def zfs_transfer(ssh_source, source_filesystem, first_snapshot, second_snapshot,
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ssh_target, target_filesystem, resume_token=None, buffer_size=None):
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#### build source command
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source_cmd=[]
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if ssh_source != "local":
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source_cmd.extend([ "ssh", ssh_source ])
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if args.ssh_cipher:
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source_cmd.extend(["-c", args.ssh_cipher])
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if args.compress:
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source_cmd.append("-C")
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source_cmd.extend(["zfs", "send", ])
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#only verbose in debug mode, lots of output
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if args.debug:
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source_cmd.append("-v")
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if not first_snapshot:
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txt="Initial transfer of "+source_filesystem+" snapshot "+second_snapshot
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else:
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txt="Incremental transfer of "+source_filesystem+" between snapshots "+first_snapshot+"..."+second_snapshot
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if resume_token:
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source_cmd.extend([ "-t", resume_token ])
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verbose("RESUMING "+txt)
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else:
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source_cmd.append("-p")
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if first_snapshot:
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source_cmd.extend([ "-i", first_snapshot ])
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if ssh_source != "local":
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source_cmd.append("'" + source_filesystem + "@" + second_snapshot + "'")
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else:
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source_cmd.append(source_filesystem + "@" + second_snapshot)
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verbose(txt)
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#### build target command
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target_cmd=[]
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if ssh_target != "local":
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target_cmd.extend([ "ssh", ssh_target ])
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if args.ssh_cipher:
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target_cmd.extend(["-c", args.ssh_cipher])
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if args.compress:
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target_cmd.append("-C")
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target_cmd.extend(["zfs", "recv", "-u" ])
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#also verbose in --verbose mode so we can see the transfer speed when its completed
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if args.verbose or args.debug:
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target_cmd.append("-v")
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if args.resume:
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target_cmd.append("-s")
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if ssh_target!="local":
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target_cmd.append("'" + target_filesystem + "'")
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else:
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target_cmd.append(target_filesystem)
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#### make sure parent on target exists
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parent_filesystem= "/".join(target_filesystem.split("/")[:-1])
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run(ssh_to=ssh_target, cmd=[ "zfs", "create" ,"-p", parent_filesystem ], test=args.test)
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### execute pipe
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debug_txt="# "+source_cmd[0]+" '"+("' '".join(source_cmd[1:]))+"'" + " | " + target_cmd[0]+" '"+("' '".join(target_cmd[1:]))+"'"
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if args.test:
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debug("[TEST] "+debug_txt)
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return
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else:
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debug(debug_txt)
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source_proc=subprocess.Popen(source_cmd, env=os.environ, stdout=subprocess.PIPE)
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target_proc=subprocess.Popen(target_cmd, env=os.environ, stdin=source_proc.stdout)
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source_proc.stdout.close() # Allow p1 to receive a SIGPIPE if p2 exits.
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target_proc.communicate()
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if source_proc.returncode:
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raise(subprocess.CalledProcessError(source_proc.returncode, source_cmd))
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#zfs recv sometimes gives an exitcode 1 while the transfer was succesfull, therefore we ignore exit 1's and do an extra check to see if the snapshot is there.
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if target_proc.returncode and target_proc.returncode!=1:
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raise(subprocess.CalledProcessError(target_proc.returncode, target_cmd))
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debug("Verifying if snapshot exists on target")
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run(ssh_to=ssh_target, cmd=["zfs", "list", target_filesystem+"@"+second_snapshot ])
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"""get filesystems that where already backupped to a target. """
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def zfs_get_backupped_filesystems(ssh_to, backup_name, target_fs):
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#get all target filesystems that have received or inherited the backup propert, under the target_fs tree
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ret=run(ssh_to=ssh_to, tab_split=False, cmd=[
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"zfs", "get", "-r", "-t", "volume,filesystem", "-o", "name", "-s", "received,inherited", "-H", "autobackup:"+backup_name, target_fs
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])
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return(ret)
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"""get filesystems that where once backupped to target but are no longer selected on source
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these are filesystems that are not in the list in target_filesystems.
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this happens when filesystems are destroyed or unselected on the source.
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"""
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def get_stale_backupped_filesystems(ssh_to, backup_name, target_fs, target_filesystems):
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backupped_filesystems=zfs_get_backupped_filesystems(ssh_to=ssh_to, backup_name=backup_name, target_fs=target_fs)
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#determine backupped filesystems that are not in target_filesystems anymore
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stale_backupped_filesystems=[]
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for backupped_filesystem in backupped_filesystems:
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if backupped_filesystem not in target_filesystems:
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stale_backupped_filesystems.append(backupped_filesystem)
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return(stale_backupped_filesystems)
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now=time.time()
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"""determine list of snapshot (in @format) to destroy, according to age"""
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def determine_destroy_list(snapshots, days):
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ret=[]
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for filesystem in snapshots:
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for snapshot in snapshots[filesystem]:
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time_str=re.findall("^.*-([0-9]*)$", snapshot)[0]
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if len(time_str)==14:
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#new format:
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time_secs=time.mktime(time.strptime(time_str,"%Y%m%d%H%M%S"))
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else:
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time_secs=int(time_str)
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# verbose("time_secs"+time_str)
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if (now-time_secs) > (24 * 3600 * days):
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ret.append(filesystem+"@"+snapshot)
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return(ret)
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def lstrip_path(path, count):
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return("/".join(path.split("/")[count:]))
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class ZfsDataset:
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"""a generic zfs dataset"""
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def __init__(name, parent, backup=false, created=false):
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""" backup: should be backupped by zfs_autobackup
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created: is created by zfs_autobackup (and may be destroyed by it as well)
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parent: parent dataset this belongs to (none is "root")
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def __init__(name, parent):
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"""
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"""
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self.name=name
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self.parent=parent
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@ -426,267 +169,21 @@ class ZfsSnapshot(Dataset):
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self.next_snapshot
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class ZfsBackupSource():
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"""backup source.
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contains high level backup source functions.
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these work with ZfsDataset and ZfsSnapshot objects.
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"""
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def __init__(self):
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self.node=ZfsNode(ssh_to=args.ssh_to)
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self.datasets={}
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self.snapshots={}
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def refresh():
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"""refresh all data by calling various zfs commands"""
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selected_filesystems=self.node.zfs_get_selected_filesystems()
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def zfs_autobackup():
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############## data gathering section
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if args.test:
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args.verbose=True
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verbose("RUNNING IN TEST-MODE, NOT MAKING ACTUAL BACKUP!")
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### getting and determinging source/target filesystems
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# get selected filesystem on backup source
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verbose("Getting selected source filesystems for backup {0} on {1}".format(args.backup_name,args.ssh_source))
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source_filesystems=zfs_get_selected_filesystems(args.ssh_source, args.backup_name)
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#nothing todo
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if not source_filesystems:
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error("No filesystems source selected, please do a 'zfs set autobackup:{0}=true' on {1}".format(args.backup_name,args.ssh_source))
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sys.exit(1)
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# determine target filesystems
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target_filesystems=[]
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for source_filesystem in source_filesystems:
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#append args.target_fs prefix and strip args.strip_path paths from source_filesystem
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target_filesystems.append(args.target_fs + "/" + lstrip_path(source_filesystem, args.strip_path))
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### creating snapshots
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# this is one of the first things we do, so that in case of failures we still have snapshots.
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#create new snapshot?
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if not args.no_snapshot:
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new_snapshot_name=args.backup_name+"-"+time.strftime("%Y%m%d%H%M%S")
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verbose("Creating source snapshot {0} on {1} ".format(new_snapshot_name, args.ssh_source))
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zfs_create_snapshot(args.ssh_source, source_filesystems, new_snapshot_name)
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### get resumable transfers
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resumable_target_filesystems={}
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if args.resume:
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verbose("Checking for aborted transfers that can be resumed")
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resumable_target_filesystems=zfs_get_resumable_filesystems(args.ssh_target, target_filesystems)
|
||||
debug("Resumable filesystems: "+str(pprint.pformat(resumable_target_filesystems)))
|
||||
|
||||
|
||||
### get all snapshots of all selected filesystems on both source and target
|
||||
|
||||
verbose("Getting source snapshot-list from {0}".format(args.ssh_source))
|
||||
source_snapshots=zfs_get_snapshots(args.ssh_source, source_filesystems, args.backup_name)
|
||||
debug("Source snapshots: " + str(pprint.pformat(source_snapshots)))
|
||||
|
||||
target_snapshots={}
|
||||
try:
|
||||
verbose("Getting target snapshot-list from {0}".format(args.ssh_target))
|
||||
target_snapshots=zfs_get_snapshots(args.ssh_target, target_filesystems, args.backup_name)
|
||||
except subprocess.CalledProcessError:
|
||||
verbose("(ignoring errors, probably initial backup for this filesystem)")
|
||||
pass
|
||||
debug("Target snapshots: " + str(pprint.pformat(target_snapshots)))
|
||||
|
||||
|
||||
#obsolete snapshots that may be removed
|
||||
source_obsolete_snapshots={}
|
||||
target_obsolete_snapshots={}
|
||||
|
||||
|
||||
|
||||
############## backup section
|
||||
|
||||
#determine which snapshots to send for each filesystem
|
||||
for source_filesystem in source_filesystems:
|
||||
target_filesystem=args.target_fs + "/" + lstrip_path(source_filesystem, args.strip_path)
|
||||
|
||||
if source_filesystem not in source_snapshots:
|
||||
#this happens if you use --no-snapshot and there are new filesystems without snapshots
|
||||
verbose("Skipping source filesystem {0}, no snapshots found".format(source_filesystem))
|
||||
else:
|
||||
|
||||
#incremental or initial send?
|
||||
if target_filesystem in target_snapshots and target_snapshots[target_filesystem]:
|
||||
#incremental mode, determine what to send and what is obsolete
|
||||
|
||||
#latest succesfully send snapshot, should be common on both source and target
|
||||
latest_target_snapshot=target_snapshots[target_filesystem][-1]
|
||||
|
||||
if latest_target_snapshot not in source_snapshots[source_filesystem]:
|
||||
#cant find latest target anymore. find first common snapshot and inform user
|
||||
error="Cant find latest target snapshot on source, did you destroy it accidently? "+source_filesystem+"@"+latest_target_snapshot
|
||||
for latest_target_snapshot in reversed(target_snapshots[target_filesystem]):
|
||||
if latest_target_snapshot in source_snapshots[source_filesystem]:
|
||||
error=error+"\nYou could solve this by rolling back to: "+target_filesystem+"@"+latest_target_snapshot;
|
||||
break
|
||||
|
||||
raise(Exception(error))
|
||||
|
||||
#send all new source snapshots that come AFTER the last target snapshot
|
||||
latest_source_index=source_snapshots[source_filesystem].index(latest_target_snapshot)
|
||||
send_snapshots=source_snapshots[source_filesystem][latest_source_index+1:]
|
||||
|
||||
#source snapshots that come BEFORE last target snapshot are obsolete
|
||||
source_obsolete_snapshots[source_filesystem]=source_snapshots[source_filesystem][0:latest_source_index]
|
||||
|
||||
#target snapshots that come BEFORE last target snapshot are obsolete
|
||||
latest_target_index=target_snapshots[target_filesystem].index(latest_target_snapshot)
|
||||
target_obsolete_snapshots[target_filesystem]=target_snapshots[target_filesystem][0:latest_target_index]
|
||||
else:
|
||||
#initial mode, send all snapshots, nothing is obsolete:
|
||||
latest_target_snapshot=None
|
||||
send_snapshots=source_snapshots[source_filesystem]
|
||||
target_obsolete_snapshots[target_filesystem]=[]
|
||||
source_obsolete_snapshots[source_filesystem]=[]
|
||||
|
||||
#now actually send the snapshots
|
||||
if not args.no_send:
|
||||
|
||||
if send_snapshots and args.rollback and latest_target_snapshot:
|
||||
#roll back any changes on target
|
||||
debug("Rolling back target to latest snapshot.")
|
||||
run(ssh_to=args.ssh_target, test=args.test, cmd=["zfs", "rollback", target_filesystem+"@"+latest_target_snapshot ])
|
||||
|
||||
|
||||
for send_snapshot in send_snapshots:
|
||||
|
||||
#resumable?
|
||||
if target_filesystem in resumable_target_filesystems:
|
||||
resume_token=resumable_target_filesystems.pop(target_filesystem)
|
||||
else:
|
||||
resume_token=None
|
||||
|
||||
zfs_transfer(
|
||||
ssh_source=args.ssh_source, source_filesystem=source_filesystem,
|
||||
first_snapshot=latest_target_snapshot, second_snapshot=send_snapshot,
|
||||
ssh_target=args.ssh_target, target_filesystem=target_filesystem,
|
||||
resume_token=resume_token
|
||||
)
|
||||
|
||||
|
||||
|
||||
#now that we succesfully transferred this snapshot, the previous snapshot is obsolete:
|
||||
if latest_target_snapshot:
|
||||
target_obsolete_snapshots[target_filesystem].append(latest_target_snapshot)
|
||||
source_obsolete_snapshots[source_filesystem].append(latest_target_snapshot)
|
||||
#we just received a new filesytem?
|
||||
else:
|
||||
if args.clear_refreservation:
|
||||
debug("Clearing refreservation to save space.")
|
||||
|
||||
run(ssh_to=args.ssh_target, test=args.test, cmd=["zfs", "set", "refreservation=none", target_filesystem ])
|
||||
|
||||
|
||||
if args.clear_mountpoint:
|
||||
debug("Setting canmount=noauto to prevent auto-mounting in the wrong place. (ignoring errors)")
|
||||
|
||||
run(ssh_to=args.ssh_target, test=args.test, cmd=["zfs", "set", "canmount=noauto", target_filesystem ], valid_exitcodes= [0, 1] )
|
||||
|
||||
|
||||
latest_target_snapshot=send_snapshot
|
||||
|
||||
|
||||
|
||||
############## cleanup section
|
||||
#we only do cleanups after everything is complete, to keep everything consistent (same snapshots everywhere)
|
||||
|
||||
|
||||
#find stale backups on target that have become obsolete
|
||||
verbose("Getting stale filesystems and snapshots from {0}".format(args.ssh_target))
|
||||
stale_target_filesystems=get_stale_backupped_filesystems(ssh_to=args.ssh_target, backup_name=args.backup_name, target_fs=args.target_fs, target_filesystems=target_filesystems)
|
||||
debug("Stale target filesystems: {0}".format("\n".join(stale_target_filesystems)))
|
||||
|
||||
stale_target_snapshots=zfs_get_snapshots(args.ssh_target, stale_target_filesystems, args.backup_name)
|
||||
debug("Stale target snapshots: " + str(pprint.pformat(stale_target_snapshots)))
|
||||
target_obsolete_snapshots.update(stale_target_snapshots)
|
||||
|
||||
#determine stale filesystems that have no snapshots left (the can be destroyed)
|
||||
#TODO: prevent destroying filesystems that have underlying filesystems that are still active.
|
||||
stale_target_destroys=[]
|
||||
for stale_target_filesystem in stale_target_filesystems:
|
||||
if stale_target_filesystem not in stale_target_snapshots:
|
||||
stale_target_destroys.append(stale_target_filesystem)
|
||||
|
||||
if stale_target_destroys:
|
||||
if args.destroy_stale:
|
||||
verbose("Destroying stale filesystems on target {0}:\n{1}".format(args.ssh_target, "\n".join(stale_target_destroys)))
|
||||
zfs_destroy(ssh_to=args.ssh_target, filesystems=stale_target_destroys, recursive=True)
|
||||
else:
|
||||
verbose("Stale filesystems on {0}, use --destroy-stale to destroy:\n{1}".format(args.ssh_target, "\n".join(stale_target_destroys)))
|
||||
|
||||
|
||||
#now actually destroy the old snapshots
|
||||
source_destroys=determine_destroy_list(source_obsolete_snapshots, args.keep_source)
|
||||
if source_destroys:
|
||||
verbose("Destroying old snapshots on source {0}:\n{1}".format(args.ssh_source, "\n".join(source_destroys)))
|
||||
zfs_destroy_snapshots(ssh_to=args.ssh_source, snapshots=source_destroys)
|
||||
|
||||
target_destroys=determine_destroy_list(target_obsolete_snapshots, args.keep_target)
|
||||
if target_destroys:
|
||||
verbose("Destroying old snapshots on target {0}:\n{1}".format(args.ssh_target, "\n".join(target_destroys)))
|
||||
zfs_destroy_snapshots(ssh_to=args.ssh_target, snapshots=target_destroys)
|
||||
|
||||
|
||||
verbose("All done")
|
||||
|
||||
|
||||
|
||||
################################################################## ENTRY POINT
|
||||
|
||||
# parse arguments
|
||||
import argparse
|
||||
parser = argparse.ArgumentParser(description='ZFS autobackup v2.1')
|
||||
parser.add_argument('--ssh-source', default="local", help='Source host to get backup from. (user@hostname) Default %(default)s.')
|
||||
parser.add_argument('--ssh-target', default="local", help='Target host to push backup to. (user@hostname) Default %(default)s.')
|
||||
parser.add_argument('--ssh-cipher', default=None, help='SSH cipher to use (default %(default)s)')
|
||||
parser.add_argument('--keep-source', type=int, default=30, help='Number of days to keep old snapshots on source. Default %(default)s.')
|
||||
parser.add_argument('--keep-target', type=int, default=30, help='Number of days to keep old snapshots on target. Default %(default)s.')
|
||||
parser.add_argument('backup_name', help='Name of the backup (you should set the zfs property "autobackup:backup-name" to true on filesystems you want to backup')
|
||||
parser.add_argument('target_fs', help='Target filesystem')
|
||||
|
||||
parser.add_argument('--no-snapshot', action='store_true', help='dont create new snapshot (usefull for finishing uncompleted backups, or cleanups)')
|
||||
parser.add_argument('--no-send', action='store_true', help='dont send snapshots (usefull to only do a cleanup)')
|
||||
parser.add_argument('--resume', action='store_true', help='support resuming of interrupted transfers by using the zfs extensible_dataset feature (both zpools should have it enabled)')
|
||||
|
||||
parser.add_argument('--strip-path', default=0, type=int, help='number of directory to strip from path (use 1 when cloning zones between 2 SmartOS machines)')
|
||||
|
||||
|
||||
parser.add_argument('--destroy-stale', action='store_true', help='Destroy stale backups that have no more snapshots. Be sure to verify the output before using this! ')
|
||||
parser.add_argument('--clear-refreservation', action='store_true', help='Set refreservation property to none for new filesystems. Usefull when backupping SmartOS volumes. (recommended)')
|
||||
parser.add_argument('--clear-mountpoint', action='store_true', help='Sets canmount=noauto property, to prevent the received filesystem from mounting over existing filesystems. (recommended)')
|
||||
parser.add_argument('--rollback', action='store_true', help='Rollback changes on the target before starting a backup. (normally you can prevent changes by setting the readonly property on the target_fs to on)')
|
||||
|
||||
|
||||
parser.add_argument('--compress', action='store_true', help='use compression during zfs send/recv')
|
||||
parser.add_argument('--test', action='store_true', help='dont change anything, just show what would be done (still does all read-only operations)')
|
||||
parser.add_argument('--verbose', action='store_true', help='verbose output')
|
||||
parser.add_argument('--debug', action='store_true', help='debug output (shows commands that are executed)')
|
||||
|
||||
#note args is the only global variable we use, since its a global readonly setting anyway
|
||||
args = parser.parse_args()
|
||||
|
||||
|
||||
zfs_autobackup()
|
||||
# class ZfsBackupSource():
|
||||
# """backup source.
|
||||
#
|
||||
# contains high level backup source functions.
|
||||
#
|
||||
# these work with ZfsDataset and ZfsSnapshot objects.
|
||||
#
|
||||
# """
|
||||
#
|
||||
# def __init__(self):
|
||||
# self.node=ZfsNode(ssh_to=args.ssh_to)
|
||||
# self.datasets={}
|
||||
# self.snapshots={}
|
||||
#
|
||||
#
|
||||
# def refresh():
|
||||
# """refresh all data by calling various zfs commands"""
|
||||
# selected_filesystems=self.node.zfs_get_selected_filesystems()
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user