Create rsync_failure_codes option.

User may optionally create a file rsync_failure_codes with a
newline-separated list of rsync return codes that are to be
regarded as complete failure.

If rsync exits with such a code, then the backup will be marked
for deletion during the next ccollect run (if delete_incomplete).

I added documentation for this feature in doc/ccollect.text

In my experience (yours may differ), two rsync exit codes that
belong in this file are 12 and 255.  I have seen 12 result from
ssh errors and 255 result from a kernel module conflict.  In both
cases, the resulting backups were empty.  Without the
rsync_failure_codes option, such errors cause good backups to be
deleted, as per c_interval, leaving behind the new empty backups.

In the long run, we may want a different and more comprehensive
method for analyzing rsync errors.  In the short run, I find this
option necessary.
This commit is contained in:
jll2 2009-06-24 17:01:14 -07:00
parent 142fd24fc8
commit 544a7d269e
2 changed files with 36 additions and 10 deletions

View file

@ -281,7 +281,8 @@ while [ "${i}" -lt "${no_sources}" ]; do
c_dest="${backup}/destination"
c_pre_exec="${backup}/pre_exec"
c_post_exec="${backup}/post_exec"
for opt in exclude verbose very_verbose rsync_options summary delete_incomplete remote_host ; do
for opt in exclude verbose very_verbose rsync_options summary delete_incomplete \
remote_host rsync_failure_codes ; do
if [ -f "${backup}/$opt" -o -f "${backup}/no_$opt" ]; then
eval c_$opt=\"${backup}/$opt\"
else
@ -530,17 +531,32 @@ while [ "${i}" -lt "${no_sources}" ]; do
_techo "Transferring files..."
rsync "$@" "${source}" "${destination_full}"; ret=$?
_techo "Finished backup (rsync return code: $ret)."
#
# remove marking here
# Check if rsync exit code indicates failure.
#
fail=""
if [ -f "$c_rsync_failure_codes" ]; then
while read code ; do
if [ "$ret" = "$code" ]; then
fail=1
fi
done <"$c_rsync_failure_codes"
fi
#
# Remove marking here unless rsync failed.
#
if [ -z "$fail" ]; then
pcmd rm "${destination_dir}.${c_marker}" || \
_exit_err "Removing ${destination_dir}/${c_marker} failed."
_techo "Finished backup (rsync return code: $ret)."
if [ "${ret}" -ne 0 ]; then
_techo "Warning: rsync exited non-zero, the backup may be broken (see rsync errors)."
fi
else
_techo "Warning: rsync failed with return code $ret."
fi
#
# post_exec

View file

@ -359,6 +359,7 @@ Additionally a source may have the following files:
- `delete_incomplete` delete incomplete backups
- `remote_host` host to backup to
- `rsync_failure_codes` list of rsync exit codes that indicate complete failure
Example:
@ -574,6 +575,15 @@ If you create the file `delete_incomplete` in a source specification directory,
was interrupted) and remove them. Without this file `ccollect` will only warn
the user.
Detailed description of "rsync_failure_codes"
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
If you have the file `rsync_failure_codes` in your source configuration
directory, it should contain a newline-separated list of numbers representing
rsync exit codes. If rsync exits with any code in this list, a marker will
be left in the destination directory indicating failure of this backup. If
you have enabled delete_incomplete, then this backup will be deleted during
the next ccollect run on the same interval.
Hints
-----