[pve-devel] [PATCH zsync 6/6] fix #3351: allow keeping a different number of snapshots on source and destination

[Bruce Wainer]

Hello Fabian,
Since this is a series of patches, could you provide the full pve-zsync
file with all the patches? It would be easier for me to test it this way.
Thank you,
Bruce

On Tue, May 11, 2021 at 9:00 AM Fabian Ebner <f.ebner at proxmox.com> wrote:

> by introducing a new dest-maxsnap parameter which can be used to override
> maxsnap for the destination side.
>
> This is useful for backups, as one can potentially save a lot of space on
> the
> source side (or the destination side if one can come up with a use case for
> that) by keeping fewer snapshots around.
>
> Signed-off-by: Fabian Ebner <f.ebner at proxmox.com>
> ---
>  pve-zsync | 25 +++++++++++++++++++++++--
>  1 file changed, 23 insertions(+), 2 deletions(-)
>
> diff --git a/pve-zsync b/pve-zsync
> index 1213361..39ead0d 100755
> --- a/pve-zsync
> +++ b/pve-zsync
> @@ -244,6 +244,7 @@ sub parse_argv {
>         verbose => undef,
>         limit => undef,
>         maxsnap => undef,
> +       dest_maxsnap => undef,
>         name => undef,
>         skip => undef,
>         method => undef,
> @@ -261,6 +262,7 @@ sub parse_argv {
>         'verbose' => \$param->{verbose},
>         'limit=i' => \$param->{limit},
>         'maxsnap=i' => \$param->{maxsnap},
> +       'dest-maxsnap=i' => \$param->{dest_maxsnap},
>         'name=s' => \$param->{name},
>         'skip' => \$param->{skip},
>         'method=s' => \$param->{method},
> @@ -336,6 +338,7 @@ sub param_to_job {
>      $job->{method} = "ssh" if !$job->{method};
>      $job->{limit} = $param->{limit};
>      $job->{maxsnap} = $param->{maxsnap};
> +    $job->{dest_maxsnap} = $param->{dest_maxsnap};
>      $job->{source} = $param->{source};
>      $job->{source_user} = $param->{source_user};
>      $job->{dest_user} = $param->{dest_user};
> @@ -460,6 +463,7 @@ sub format_job {
>      $text .= " root";
>      $text .= " $PROGNAME sync --source $job->{source} --dest
> $job->{dest}";
>      $text .= " --name $job->{name} --maxsnap $job->{maxsnap}";
> +    $text .= " --dest-maxsnap $job->{dest_maxsnap}" if
> defined($job->{dest_maxsnap});
>      $text .= " --limit $job->{limit}" if $job->{limit};
>      $text .= " --method $job->{method}";
>      $text .= " --verbose" if $job->{verbose};
> @@ -681,20 +685,31 @@ sub sync {
>
>             ($dest->{old_snap}, $dest->{last_snap}) = snapshot_get(
>                 $dest_dataset,
> -               $param->{maxsnap},
> +               $param->{dest_maxsnap} // $param->{maxsnap},
>                 $param->{name},
>                 $dest->{ip},
>                 $param->{dest_user},
>             );
>
> +           ($source->{old_snap}) = snapshot_get(
> +               $source->{all},
> +               $param->{maxsnap},
> +               $param->{name},
> +               $source->{ip},
> +               $param->{source_user},
> +           );
> +
>             prepare_prepended_target($source, $dest, $param->{dest_user})
> if defined($dest->{prepend});
>
>             snapshot_add($source, $dest, $param->{name}, $date,
> $param->{source_user}, $param->{dest_user});
>
>             send_image($source, $dest, $param);
>
> -           for my $old_snap (@{$dest->{old_snap}}) {
> +           for my $old_snap (@{$source->{old_snap}}) {
>                 snapshot_destroy($source->{all}, $old_snap, $source->{ip},
> $param->{source_user});
> +           }
> +
> +           for my $old_snap (@{$dest->{old_snap}}) {
>                 snapshot_destroy($dest_dataset, $old_snap, $dest->{ip},
> $param->{dest_user});
>             }
>         };
> @@ -1157,6 +1172,9 @@ $PROGNAME create --dest <string> --source <string>
> [OPTIONS]
>                 The number of snapshots to keep until older ones are
> erased.
>                 The default is 1, use 0 for unlimited.
>
> +       --dest-maxsnap   integer
> +               Override maxsnap for the destination dataset.
> +
>         --name      string
>                 The name of the sync job, if not set it is default
>
> @@ -1197,6 +1215,9 @@ $PROGNAME sync --dest <string> --source <string>
> [OPTIONS]\n
>                 The number of snapshots to keep until older ones are
> erased.
>                 The default is 1, use 0 for unlimited.
>
> +       --dest-maxsnap   integer
> +               Override maxsnap for the destination dataset.
> +
>         --name      string
>                 The name of the sync job, if not set it is 'default'.
>                 It is only necessary if scheduler allready contains this
> source.
> --
> 2.20.1
>
>
>
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