Build check hash within btr_tree node instead per URL. This makes it
aware of shared btr_tree (different hostname:port pointing to same
btrfs filesystem).
Common virtual machine setups have multiple volume sections with same
host, but distinct port numbers for each machine.
- make caches dependent on MACHINE_ID instead of HOST
- append port number to URL
- add MACHINE_ID to vinfo
- use MACHINE_ID where applicable
This even works if virtual machines share the same btrfs filesystems:
If a equal UUID is found on distinct machines, btr_tree() will return
the already present tree, in order to be consistent after node
injections.
Setting the ssh port directly in the "volume" / "target" config lines
adds the possibility to have a create a unique "hostname:port"
identifier (preparatory for MACHINE_ID to distinguish virtual machines
on same host with different ports.)
btrbk <= 0.27.2 does not print "target_rsh" and "target_type" when
called with --format=raw, see $table_formats{resolved}. This is fixed
in 0.28.0.
Hardcoding target_type=send-receive is not so bad, as for raw targets
btrbk-verify complains first with:
btrbk-verify: missing required variable "target_rsh" in btrbk --format=raw line
So we should not run rsync (which is not really a problem, rsync just
fails with "not a directory").
Compare files and attributes by checksum, using rsync(1) in dry-run
mode with all preserve options enabled.
Resolves snapshot/backup pairs by evaluating the output of
"btrbk list latest [filter...]".
Restrictions:
- ".d..t...... ./" lines are ignored by default:
Root folder timestamp always differ.
- "cd+++++++++ .*" lines are ignored by default:
Nested subvolumes appear as new empty directories.
- btrbk raw targets are skipped
- rsync needs root in most cases (see --ssh-* options)
When called from another script, we dont want the help message printed
on errors. E.g. when running something like:
btrbk list snapshots -q filter_which_does_not_match
While on traditional UNIX the documentation (especially the man pages)
are gzip'ed, modern distros have helpers to compress it.
This patch adds an option to disable compression:
make COMPRESS=no
When configuring "target" in a global (or "volume") context, and
overriding target_preserve_min in "subvolume" section, the scheduler
has undefined behavior (mixing up the "min" values).
Fixed by returning a copy of the preserve hash in
config_preserve_hash().
It is possible that the subvolume path is not accessible by the user
calling btrbk. When resolving mount points, "readlink" is used on the
path, which also needs to be wrapped with "sudo".
The FORCE_PRESERVE information is set on the node, and was lost for
"latest common target" as get_receive_targets() returned vinfo without
node information.
fixes regression: 6c502cb btrbk: search complete target tree for correlated subvolumes
btrbk now runs "btrfs subvolume list" from the mountpoint instead of
the volume path, which for some users is not below --restrict-path. As
the output of "btrfs subvolume list" is the same (complete btrfs tree
for the filesystem), it is ok to ignore the restrict-path here.
Axel Burri