dsnap-sync: update documentation for tag 0.5.9
* README.md * TODO.md * Examples.md Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>
This commit is contained in:
67
README.md
67
README.md
@@ -1,5 +1,5 @@
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<!-- dsnap-sync README.md -->
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<!-- dsnap-sync README.md -->
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<!-- version: 0.5.7 -->
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<!-- version: 0.5.9 -->
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# dsnap-sync
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# dsnap-sync
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@@ -26,7 +26,7 @@ secured with ssh.
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The tool is implemented as a posix shell script (dash), to keep the footprint
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The tool is implemented as a posix shell script (dash), to keep the footprint
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small. `dsnap-sync` will support interactive and time scheduled backup processes.
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small. `dsnap-sync` will support interactive and time scheduled backup processes.
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Scheduling should be implemented as a pair of systemd service and timer-units.
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Scheduling should be implemented as a pair of systemd service and timer-units.
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The [example section](usr/share/doc/Examples.md#systemd)
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The [example section](usr/share/doc/dsnap-sync/Examples.md#systemd)
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will offer details as a reference point.
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will offer details as a reference point.
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## Backup process
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## Backup process
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@@ -81,10 +81,12 @@ A scheduled process should be defined as a systemd.unit. Inside the unit
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definition the execution parameter will take the `dsnap-sync` call, appending
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definition the execution parameter will take the `dsnap-sync` call, appending
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all needed parameters as config options. In combination with a corresponding
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all needed parameters as config options. In combination with a corresponding
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systemd.timer unit, you are able to finetune your backup needs.
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systemd.timer unit, you are able to finetune your backup needs.
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The [example section](usr/share/doc/Examples.md#systemd)
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The [example section](usr/share/doc/dsnap-sync/Examples.md#systemd)
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will offer details as a reference point.
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will offer details as a reference point.
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## Requirements
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## Requirements
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### dsnap-sync
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Beside the posix shell itself (e.g. `dash`), `dsnap-sync`relies on external
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Beside the posix shell itself (e.g. `dash`), `dsnap-sync`relies on external
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tools to achieve its goal. At run-time their availability is checked.
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tools to achieve its goal. At run-time their availability is checked.
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Following tools are used:
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Following tools are used:
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@@ -94,12 +96,25 @@ Following tools are used:
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- findmnt
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- findmnt
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- sed
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- sed
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- snapper
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- snapper
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- ssh
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As an option, you can enrich interactive responses using
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As an option, you can enrich interactive responses using
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- notify-send
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- notify-send
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- pv
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- pv
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### tape-admin
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Beside the posix shell itself (e.g. `dash`), `dsnap-sync`relies on external
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tools to achieve its goal. At run-time their availability is checked.
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Following tools are used:
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- jq
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- ltfs
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- mkltfs
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- mtx
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- sed
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## Installation
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## Installation
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### Building from source
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### Building from source
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@@ -144,6 +159,7 @@ Please use your host software package manager.
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Options:
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Options:
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-a, --automount <path> start automount for given path to get a valid target mountpoint.
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-a, --automount <path> start automount for given path to get a valid target mountpoint.
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-b, --backupdir <prefix> backupdir is a relative path that will be appended to target backup-root
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-b, --backupdir <prefix> backupdir is a relative path that will be appended to target backup-root
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--use-btrfs-quota use btrfs-quota to calculate snapshot size
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-d, --description <desc> Change the snapper description. Default: "latest incremental backup"
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-d, --description <desc> Change the snapper description. Default: "latest incremental backup"
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--label-finished <desc> snapper description tagging successful jobs. Default: "dsnap-sync backup"
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--label-finished <desc> snapper description tagging successful jobs. Default: "dsnap-sync backup"
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--label-running <desc> snapper description tagging active jobs. Default: "dsnap-sync in progress"
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--label-running <desc> snapper description tagging active jobs. Default: "dsnap-sync in progress"
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@@ -170,28 +186,28 @@ Please use your host software package manager.
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should specify the remote machine's hostname or ip address. The 'root' user must be
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should specify the remote machine's hostname or ip address. The 'root' user must be
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permitted to login on the remote machine.
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permitted to login on the remote machine.
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--dry-run perform a trial run where no changes are made.
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--dry-run perform a trial run where no changes are made.
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-v, --verbose Be more verbose on what's going on.
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-v, --verbose Be verbose on what's going on (min: --verbose=1, max: --verbose=3)
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--version show program version
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--version show program version
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## First run
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## First run
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If you have never synced to the paticular target device (first run), `dsnap-sync`
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If you have never synced to the paticular target device (first run), `dsnap-sync`
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will take care to create the necessary target filesystem-structure. Following
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will take care to create the necessary target filesystem-structure. Following
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backup types are differenciated:
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backup types are differenciated:
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* btrfs-snapshots
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* btrfs-snapshots
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This is the default backup type. `dsnap-sync` will use this type to sync
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This is the default backup type. `dsnap-sync` will use this type to sync
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a btrfs-snapshot of an existing `snapper` configuration from a source
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a btrfs-snapshot of an existing `snapper` configuration from a source
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device to a target device. On the target device the needed `snapper`
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device to a target device. On the target device the needed `snapper`
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structure will be build up as needed. Aside the new target filesystem
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structure will be build up as needed. Aside the new target filesystem
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path, `dsnap-sync` will create a new target `snapper` configuration. It
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path, `dsnap-sync` will create a new target `snapper` configuration. It
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will incorporate the template (`/etc/snapper/config-templates/dsnap-sync`).
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will incorporate the template (`/etc/snapper/config-templates/dsnap-sync`).
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To garantee unique configuration names, `dsnap-sync` take the source
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To garantee unique configuration names, `dsnap-sync` take the source
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configuration name and postfix it with targets hostname. You can adopt
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configuration name and postfix it with targets hostname. You can adopt
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this behaviour with a config option (`--config-postfix`).
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this behaviour with a config option (`--config-postfix`).
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The default `config-template` of dsnap-sync will inherit following
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The default `config-template` of dsnap-sync will inherit following
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`snapper` parameters:
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`snapper` parameters:
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* mark new snapshots as type 'single'
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* mark new snapshots as type 'single'
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@@ -216,21 +232,21 @@ backup types are differenciated:
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If the target device is not a btrfs filesystem (e.g. ext4,
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If the target device is not a btrfs filesystem (e.g. ext4,
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xfs, ltofs tapes), you need to use this backup type.
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xfs, ltofs tapes), you need to use this backup type.
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data are copied backupdir.
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data are copied backupdir.
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`dsnap-sync` will take the data of the source snapshot-ID and copy them
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`dsnap-sync` will take the data of the source snapshot-ID and copy them
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to an ordenary subdirectory. This Base-Directory will be located on the
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to an ordenary subdirectory. This Base-Directory will be located on the
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target-device below the backupdir (target-subdirectory). Inside this
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target-device below the backupdir (target-subdirectory). Inside this
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'target-subdirectory' `dsnap-sync` will mimic the `snapper` structure:
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'target-subdirectory' `dsnap-sync` will mimic the `snapper` structure:
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* the actual btrfs stream will we copied to a subdirectoy called `snapshot`
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* the actual btrfs stream will we copied to a subdirectoy called `snapshot`
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* the proccess metadata are saved to a file called `info.xml`
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* the proccess metadata are saved to a file called `info.xml`
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If you enabled the `ltfs` package, support for backups to tape is possible.
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If you enabled the `ltfs` package, support for backups to tape is possible.
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ltfs will prepare a tape, than can be mounted afterwards to a selectable
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ltfs will prepare a tape, than can be mounted afterwards to a selectable
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mount-point. A `dsnap-sync` backup to this path will be handeld as type
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mount-point. A `dsnap-sync` backup to this path will be handeld as type
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`btrfs-archive`.
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`btrfs-archive`.
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## Automounter
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## Automounter
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`dsnap-sync` offer all mounted btrfs filesystems as valid process targets.
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`dsnap-sync` offer all mounted btrfs filesystems as valid process targets.
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@@ -244,9 +260,30 @@ To link in external disks dynamically, but also asure a persistent naming
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syntax, we can use them as auto-mountable targets. To wakeup the automount
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syntax, we can use them as auto-mountable targets. To wakeup the automount
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proccess before parsing available target disks, append the target mount-point
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proccess before parsing available target disks, append the target mount-point
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as a config option to `dsnap-sync` (e.g: `--automount /var/backups/archive-disk1`).
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as a config option to `dsnap-sync` (e.g: `--automount /var/backups/archive-disk1`).
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The [example section](usr/share/doc/Examples.md#Automounter)
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The [example section](usr/share/doc/dsnap-sync/Examples.md#Automounter)
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will offer details as a reference point.
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will offer details as a reference point.
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## Tape-Administration / LTFS
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If you use `dsnap-sync` to archive snapshots on a tape, consider to use it
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in combination with LTFS. (Work in Progress: Initial support is tested
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with LTO7-Tapes in a Quantum SuperLoader3).
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The installation package will include a wrapper script `tape-admin`, which
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implements all common tasks that are needed for tape administration.
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If you are able to make use of a tape-changer (e.g Quantum SuperLoader3) the
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wrapper will take advantage of the `mtx` package to handle barcodes and slot
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management. If you create your own barcodes, please consult the documentation
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of your Loader-Device. Most likely they do support "Code 39"-Type labels.
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`LTFS` is an attempt to offer read and write-access functionality to serial
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tapes in a way that's common with hard drives. From LTO5 onwards, your are
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able to format/partition the tape with LTFS-Tools. After the successfull
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preparation the LTFS-Tape can be mounted to a selectable mountpoint (via
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FUSE). Read and write access can be managed using common OS tools.
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An open-source implementation can be found at
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[LinearTapeFileSystem](https://github.com/LinearTapeFileSystem/ltfs).
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## Contributing
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## Contributing
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Help is very welcome! Feel free to fork and issue a pull request to add features or
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Help is very welcome! Feel free to fork and issue a pull request to add features or
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12
TODO.md
12
TODO.md
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# btrfs send -p /my/snapshot-YYYY-MM-DD /my/incremental-snapshot-YYYY-MM-DD | ssh user@host 'cat >/backup/home/incremental-snapshot-YYYY-MM-DD.btrfs'
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# btrfs send -p /my/snapshot-YYYY-MM-DD /my/incremental-snapshot-YYYY-MM-DD | ssh user@host 'cat >/backup/home/incremental-snapshot-YYYY-MM-DD.btrfs'
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- dsnap-sync: introduce snapper config handling for parent/child types
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- dsnap-sync: introduce snapper config handling for parent/child types
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disk2disk -> parent to child on btrfs (default: snapshot)
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disk2disk -> parent to child on btrfs (default: snapshot)
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disk2disk2disk -> child to child on btrfs(clone snapshot)
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disk2disk2disk -> child to child on btrfs (clone snapshot)
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disk2disk2tape -> child to tape on non-btrfs (send btrfs-stream of snapshot if incremental, copy snapshot if first/full)
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disk2disk2tape -> child to tape on non-btrfs (send btrfs-stream of snapshot if incremental, copy snapshot if first/full)
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- dsnap-sync: parallel tasks per config
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- dsnap-sync: parallel tasks per config
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- dsnap-sync: introduce snapper function: important snapshots
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Important snapshots have important=yes in the userdata
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let snapper cleanup/timeline mechanisms respect this
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## finished tasks ##
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## finished tasks ##
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@@ -28,3 +25,8 @@
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- dsnap-sync: port as posix compatible
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- dsnap-sync: port as posix compatible
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- dsnap-sync: introduce selectable subvolid option
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- dsnap-sync: introduce selectable subvolid option
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- dsnap-sync: use snapper to administer target synced snapshots
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- dsnap-sync: use snapper to administer target synced snapshots
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- dsnap-sync: introduce snapper function: important snapshots
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Important snapshots have important=yes in the userdata
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let snapper cleanup/timeline mechanisms respect this
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- tape-admin: handle common tasks for tape-changer administration
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- tape-admin: handle common tasks for ltfs tape administration
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@@ -1,5 +1,5 @@
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<!-- dsnap-sync README.md -->
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<!-- dsnap-sync README.md -->
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<!-- version: 0.5.7 -->
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<!-- version: 0.5.9 -->
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# dsnap-sync
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# dsnap-sync
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@@ -23,7 +23,7 @@ Mit Blick auf Portabilität und Ressourcen-Schonung wurde `dsnap-sync`als Posix
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Shell Script implementiert (dash). Es unterstützt sowohl interaktive als auch
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Shell Script implementiert (dash). Es unterstützt sowohl interaktive als auch
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zeitgesteuerte Sicherungs-Prozesse. Zeitgesteuerte Sicherungen sollten als
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zeitgesteuerte Sicherungs-Prozesse. Zeitgesteuerte Sicherungen sollten als
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systemd Einheiten (service- und timer-units) implementiert werden.
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systemd Einheiten (service- und timer-units) implementiert werden.
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Für Details wird auf den [Beispiel-Abschnitt](usr/share/doc/Examples.md#systemd)
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Für Details wird auf den [Beispiel-Abschnitt](../../usr/share/doc/dsnap-sync/Examples.md#systemd)
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verweisen.
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verweisen.
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## Sicherungs-Prozess
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## Sicherungs-Prozess
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@@ -58,7 +58,7 @@ benötigte Übertragungszeit erheblich.
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Ein interkativer Sicherungsprozess wird Ihnen die Auswahl eines
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Ein interkativer Sicherungsprozess wird Ihnen die Auswahl eines
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Ziel-Gerätes anbieten. Sie können dieses Ziel-Gerät mit
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Ziel-Gerätes anbieten. Sie können dieses Ziel-Gerät mit
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[Kommando-Zeilen Parametern](./README.md#Options) vorauswählen.
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[Kommando-Zeilen Parametern](./README.md#Optionen) vorauswählen.
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Um eine eindeutige Zuordung eines Ziel-Gerätes sicherzustellen,
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Um eine eindeutige Zuordung eines Ziel-Gerätes sicherzustellen,
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müssen sie entweder
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müssen sie entweder
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@@ -86,10 +86,13 @@ als `dsnap-sync` Aufruf mit allen gewünschten Optionen eingestellt.
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In Verbindung mit einer zugehörigen systemd.timer Definition sind
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In Verbindung mit einer zugehörigen systemd.timer Definition sind
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sie in der Lage, unterschiedliche Ausführungszeiten mit selektierten
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sie in der Lage, unterschiedliche Ausführungszeiten mit selektierten
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Optionen umzusetzen. Für Details wird auf den
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Optionen umzusetzen. Für Details wird auf den
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[Beispiel-Abschnitt](usr/share/doc/Examples.md#systemd) verweisen.
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[Beispiel-Abschnitt](../../usr/share/doc/dsnap-sync/Examples.md#systemd)
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verweisen.
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## Anforderungen
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## Anforderungen
|
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|
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### dsnap-sync
|
||||||
|
|
||||||
Neben der eigentlichen Posix Shell (e.g. `dash`), bedient sich
|
Neben der eigentlichen Posix Shell (e.g. `dash`), bedient sich
|
||||||
`dsnap-sync` externer Tools, um die gewünschte Funktionalität
|
`dsnap-sync` externer Tools, um die gewünschte Funktionalität
|
||||||
bereitzustellen. Deren Verfügbarkeit wird zur Laufzeit überprüft.
|
bereitzustellen. Deren Verfügbarkeit wird zur Laufzeit überprüft.
|
||||||
@@ -100,6 +103,7 @@ Folgende Tools werden verwendet:
|
|||||||
- findmnt
|
- findmnt
|
||||||
- sed
|
- sed
|
||||||
- snapper
|
- snapper
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||||||
|
- ssh
|
||||||
|
|
||||||
Optional können interaktive Rückmeldungen mit foldenen Tools ergänzt
|
Optional können interaktive Rückmeldungen mit foldenen Tools ergänzt
|
||||||
werden:
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werden:
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||||||
@@ -107,6 +111,19 @@ werden:
|
|||||||
- notify-send
|
- notify-send
|
||||||
- pv
|
- pv
|
||||||
|
|
||||||
|
### tape-admin
|
||||||
|
|
||||||
|
Neben der eigentlichen Posix Shell (e.g. `dash`), bedient sich
|
||||||
|
`tape-admin` externer Tools, um die gewünschte Funktionalität
|
||||||
|
bereitzustellen. Deren Verfügbarkeit wird zur Laufzeit überprüft.
|
||||||
|
Folgende Tools werden verwendet:
|
||||||
|
|
||||||
|
- jq
|
||||||
|
- ltfs
|
||||||
|
- mkltfs
|
||||||
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- mtx
|
||||||
|
- sed
|
||||||
|
|
||||||
## Installation
|
## Installation
|
||||||
|
|
||||||
### Aus den Quellen
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### Aus den Quellen
|
||||||
@@ -154,6 +171,7 @@ Software Paket Manager.
|
|||||||
Options:
|
Options:
|
||||||
-a, --automount <path> start automount for given path to get a valid target mountpoint.
|
-a, --automount <path> start automount for given path to get a valid target mountpoint.
|
||||||
-b, --backupdir <prefix> backupdir is a relative path that will be appended to target backup-root
|
-b, --backupdir <prefix> backupdir is a relative path that will be appended to target backup-root
|
||||||
|
--use-btrfs-quota use btrfs-quota to calculate snapshot size
|
||||||
-d, --description <desc> Change the snapper description. Default: "latest incremental backup"
|
-d, --description <desc> Change the snapper description. Default: "latest incremental backup"
|
||||||
--label-finished <desc> snapper description tagging successful jobs. Default: "dsnap-sync backup"
|
--label-finished <desc> snapper description tagging successful jobs. Default: "dsnap-sync backup"
|
||||||
--label-running <desc> snapper description tagging active jobs. Default: "dsnap-sync in progress"
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--label-running <desc> snapper description tagging active jobs. Default: "dsnap-sync in progress"
|
||||||
@@ -180,7 +198,7 @@ Software Paket Manager.
|
|||||||
should specify the remote machine's hostname or ip address. The 'root' user must be
|
should specify the remote machine's hostname or ip address. The 'root' user must be
|
||||||
permitted to login on the remote machine.
|
permitted to login on the remote machine.
|
||||||
--dry-run perform a trial run where no changes are made.
|
--dry-run perform a trial run where no changes are made.
|
||||||
-v, --verbose Be more verbose on what's going on.
|
-v, --verbose Be verbose on what's going on (min: --verbose=1, max: --verbose=3)
|
||||||
--version show program version
|
--version show program version
|
||||||
|
|
||||||
## Erster Sicherungslauf
|
## Erster Sicherungslauf
|
||||||
@@ -262,9 +280,41 @@ einzubinden, können sie als 'automountbare Geräte' definiert werden.
|
|||||||
Aktiviert wird der Automount-Prozess vor der Ziel-Auswahl zu aktivieren,
|
Aktiviert wird der Automount-Prozess vor der Ziel-Auswahl zu aktivieren,
|
||||||
kannn der 'Mount-Point' als Option beim `dsnap-sync` Aufruf übergeben
|
kannn der 'Mount-Point' als Option beim `dsnap-sync` Aufruf übergeben
|
||||||
werden (z.B: `--automount /var/backups/archive-disk1`).
|
werden (z.B: `--automount /var/backups/archive-disk1`).
|
||||||
Der [Abschnitt Automount](usr/share/doc/Examples.md#Automounter)
|
Der [Abschnitt Automount](../../usr/share/doc/dsnap-sync/Examples.md#Automounter)
|
||||||
des Beispiel Dokuments enthält weitere Details.
|
des Beispiel Dokuments enthält weitere Details.
|
||||||
|
|
||||||
|
## Tape-Administration / LTFS
|
||||||
|
|
||||||
|
Wenn sie `dsnap-sync` für die Archivierung von Snapshots auf Bänder
|
||||||
|
verwenden, sollten den Einsatz in Kombination mit LTFS überdenken.
|
||||||
|
(WIP - work in progress: Die erster erfolgreicher Versuch wurde mit
|
||||||
|
LTO7-Bändern in einem Quantum SuperLoader3 getestet).
|
||||||
|
|
||||||
|
Das Installations-Paket beinhaltet ein Hilfs-Skript `tape-admin`, das
|
||||||
|
alle Basisaufgaben für die Administration von Bändern als Funktionen
|
||||||
|
bereitstellt. Hardware, die einen mechanischen Bandwechsel ermöglicht
|
||||||
|
(z.B Quantum SuperLoader3), kann das Hilfs-Skript über das Paket `mtx`
|
||||||
|
steuern. Dies beinhaltet das Auslesen von Barcodes als auch das Laden
|
||||||
|
und Entladen von Bändern in wählbare Quell- und Ziel-Schächte (Slots).
|
||||||
|
|
||||||
|
(WIP: Die Zuordnung von Band-Namen zu Pools und Slots neben deren
|
||||||
|
Media-Zugriffsrichtlienen wird in einer JSON-Datei beschrieben.
|
||||||
|
Diese muss derzeit noch manuell gepflegt werden:
|
||||||
|
`/etc/dsnap-sync/MediaPools.json`).
|
||||||
|
|
||||||
|
Werden Barcode-Labels selbst erstellt, prüfen Sie bitte Hinweise auf das
|
||||||
|
zu verwendende Format. Üblicherweise unterstützen die Barcode-Leser
|
||||||
|
"Code 39" Etiketten.
|
||||||
|
|
||||||
|
`LTFS` ist ein Ansatz, der Lese- und Schreib-Operationen auf Bänder in
|
||||||
|
der für Festplatten üblichen Funktionsweise implementiert. Ab Geräten
|
||||||
|
der LTO5 Generation sind Sie in der Lage, Bänder für die LTFS-Nutzung
|
||||||
|
vorzubareiten (formatieren, bzw. partitionieren).
|
||||||
|
Anschließend können erfolgreich formatierte Bänder in das Dateisystem
|
||||||
|
eingehängt werden (FUSE). Das Beschreiben und Auslesen der Daten erfolgt dann
|
||||||
|
mit den gewohnten Betriebssystem Tools. Eine Open-Source Implementierung finden Sie z.B. unter
|
||||||
|
[LinearTapeFileSystem](https://github.com/LinearTapeFileSystem/ltfs).
|
||||||
|
|
||||||
## Mitarbeit
|
## Mitarbeit
|
||||||
|
|
||||||
Hilfe ist sehr willkommen! Gerne könnt Ihr das Projekt forken und PR's einreichen,
|
Hilfe ist sehr willkommen! Gerne könnt Ihr das Projekt forken und PR's einreichen,
|
||||||
|
|||||||
Reference in New Issue
Block a user