SYNOPSIS

dog <command> <subcommand> [options]

DESCRIPTION

dog - Sheepdog is a distributed storage system for QEMU. It provides highly available block level storage volumes to virtual machines. Sheepdog supports advanced volume management features such as snapshot, cloning, and thin provisioning. The architecture of Sheepdog is fully symmetric; there is no central node such as a meta-data server.

The server daemon is called sheep(8). A command line utility is available via dog(8). QEMU virtual machines use the sheep daemon via a block driver available in qemu(1).

For more information, run 'dog <command> <subcommand> --help'.

COMMAND & SUBCOMMAND

vdi check [-s snapshot] [-a address] [-p port] [-h] <vdiname>

Options:

  -s, --snapshot          specify a snapshot id or tag name
  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  check and repair image's consistency

vdi create [-P] [-y] [-c copies] [-a address] [-p port] [-h] [-r] [-v] <vdiname> <size>

Options:

  -P, --prealloc          preallocate all the data objects
  -y, --hyper             create a hyper volume
  -c, --copies            specify the data redundancy level
  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit
  -r, --raw               raw output mode: omit headers, separate fields with
                          single spaces and print all sizes in decimal bytes
  -v, --verbose           print more information than default

Description:

  create an image

vdi snapshot [-s snapshot] [-a address] [-p port] [-h] [-r] [-v] <vdiname>

Options:

  -s, --snapshot          specify a snapshot id or tag name
  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit
  -r, --raw               raw output mode: omit headers, separate fields with
                          single spaces and print all sizes in decimal bytes
  -v, --verbose           print more information than default

Description:

  create a snapshot

vdi clone [-s snapshot] [-P] [-c copies] [-a address] [-p port] [-h] [-r] [-v] <src vdi> <dst vdi>

Options:

  -s, --snapshot          specify a snapshot id or tag name
  -P, --prealloc          preallocate all the data objects
  -c, --copies            specify the data redundancy level
  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit
  -r, --raw               raw output mode: omit headers, separate fields with
                          single spaces and print all sizes in decimal bytes
  -v, --verbose           print more information than default

Description:

  clone an image

vdi delete [-s snapshot] [-a address] [-p port] [-h] <vdiname>

Options:

  -s, --snapshot          specify a snapshot id or tag name
  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  delete an image

vdi rollback [-s snapshot] [-a address] [-p port] [-h] [-f] [-r] [-v] <vdiname>

Options:

  -s, --snapshot          specify a snapshot id or tag name
  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit
  -f, --force             do operation forcibly
  -r, --raw               raw output mode: omit headers, separate fields with
                          single spaces and print all sizes in decimal bytes
  -v, --verbose           print more information than default

Description:

  rollback to a snapshot

vdi list [-a address] [-p port] [-r] [-h] [vdiname]

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -r, --raw               raw output mode: omit headers, separate fields with
                          single spaces and print all sizes in decimal bytes
  -h, --help              display this help and exit

Description:

  list images

vdi tree [-a address] [-p port] [-h]

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  show images in tree view format

vdi graph [-a address] [-p port] [-h]

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  show images in Graphviz dot format

vdi object [-i index] [-s snapshot] [-a address] [-p port] [-h] <vdiname>

Options:

  -i, --index             specify the index of data objects
  -s, --snapshot          specify a snapshot id or tag name
  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  show object information in the image

vdi track [-i index] [-s snapshot] [-a address] [-p port] [-h] [-o oid] <vdiname>

Options:

  -i, --index             specify the index of data objects
  -s, --snapshot          specify a snapshot id or tag name
  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit
  -o, --oid               specify the object id of the tracking object

Description:

  show the object epoch trace in the image

vdi setattr [-d] [-x] [-a address] [-p port] [-h] <vdiname> <key> [value]

Options:

  -d, --delete            delete a key
  -x, --exclusive         write in an exclusive mode
  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  set a VDI attribute

vdi getattr [-a address] [-p port] [-h] <vdiname> <key>

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  get a VDI attribute

vdi resize [-a address] [-p port] [-h] <vdiname> <new size>

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  resize an image

vdi read [-s snapshot] [-a address] [-p port] [-h] <vdiname> [<offset> [<len>]]

Options:

  -s, --snapshot          specify a snapshot id or tag name
  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  read data from an image

vdi write [-a address] [-p port] [-w] [-h] <vdiname> [<offset> [<len>]]

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -w, --writeback         use writeback mode
  -h, --help              display this help and exit

Description:

  write data to an image

vdi backup [-s snapshot] [-F from] [-a address] [-p port] [-h] <vdiname> <backup>

Options:

  -s, --snapshot          specify a snapshot id or tag name
  -F, --from              create a differential backup from the snapshot
  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  create an incremental backup between two snapshots

vdi restore [-s snapshot] [-a address] [-p port] [-h] <vdiname> <backup>

Options:

  -s, --snapshot          specify a snapshot id or tag name
  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  restore snapshot images from a backup

vdi cache {flush|delete|info|purge} [-s snapshot] [-a address] [-p port] [-h] <vdiname>

Available subcommands:

  flush                   flush the cache of the vdi specified.
  delete                  delete the cache of the vdi specified in all nodes.
  info                    show usage of the cache
  purge                   purge the cache of all vdi (no flush)

Options:

  -s, --snapshot          specify a snapshot id or tag name
  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  Run 'dog vdi cache' for more information

node kill [-a address] [-p port] [-r] [-h] [-l] <node id>

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -r, --raw               raw output mode: omit headers, separate fields with
                          single spaces and print all sizes in decimal bytes
  -h, --help              display this help and exit
  -l, --local             issue request to local node

Description:

  kill node

node list [-a address] [-p port] [-r] [-h]

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -r, --raw               raw output mode: omit headers, separate fields with
                          single spaces and print all sizes in decimal bytes
  -h, --help              display this help and exit

Description:

  list nodes

node info [-a address] [-p port] [-r] [-h]

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -r, --raw               raw output mode: omit headers, separate fields with
                          single spaces and print all sizes in decimal bytes
  -h, --help              display this help and exit

Description:

  show information about each node

node recovery [-a address] [-p port] [-h] [-P] [-r]

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit
  -P, --progress          show progress of recovery in the node
  -r, --raw               raw output mode: omit headers, separate fields with
                          single spaces and print all sizes in decimal bytes

Description:

  show recovery information of nodes

node md {info|plug|unplug} [-a address] [-p port] [-r] [-A] [-h] [disks]

Available subcommands:

  info                    show multi-disk information
  plug                    plug more disk(s) into node
  unplug                  unplug disk(s) from node

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -r, --raw               raw output mode: omit headers, separate fields with
                          single spaces and print all sizes in decimal bytes
  -A, --all               show md information of all the nodes
  -h, --help              display this help and exit

Description:

  See 'dog node md' for more information

node stat [-a address] [-p port] [-r] [-w] [-h]

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -r, --raw               raw output mode: omit headers, separate fields with
                          single spaces and print all sizes in decimal bytes
  -w, --watch             watch the stat every second
  -h, --help              display this help and exit

Description:

  show stat information about the node

node log level [-a address] [-p port] [-h]

Available subcommands:

  level                   manipulate loglevel

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  show or set log level of the node

cluster info [-a address] [-p port] [-r] [-h] [-s]

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -r, --raw               raw output mode: omit headers, separate fields with
                          single spaces and print all sizes in decimal bytes
  -h, --help              display this help and exit
  -s, --backend           show backend store information

Description:

  show cluster information

cluster format [-b store] [-c copies] [-t] [-a address] [-p port] [-h]

Options:

  -b, --store             specify backend store
  -c, --copies            specify the default data redundancy (number of copies)
  -t, --strict            do not serve write request if number of nodes is not sufficient
  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  create a Sheepdog store

cluster shutdown [-a address] [-p port] [-h]

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  stop Sheepdog

cluster snapshot {save|list|load} [-a address] [-p port] [-h] <tag|idx> <path>

Available subcommands:

  save                    save snapshot to localpath
  list                    list snapshot of localpath
  load                    load snapshot from localpath

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  snapshot/restore the cluster

cluster recover {force|enable|disable} [-a address] [-f] [-p port] [-h]

Available subcommands:

  force                   force recover cluster immediately
  enable                  enable automatic recovery and run once recover if necessary
  disable                 disable automatic recovery

Options:

  -a, --address           specify the daemon address (default: localhost)
  -f, --force             do not prompt for confirmation
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  See 'dog cluster recover' for more information

cluster reweight [-a address] [-p port] [-h]

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  reweight the cluster

cluster check [-a address] [-p port] [-h]

Options:

  -a, --address           specify the daemon address (default: localhost)
  -p, --port              specify the daemon port
  -h, --help              display this help and exit

Description:

  check and repair cluster

DEPENDENCIES

Sheepdog requires QEMU 0.13.z or later and Corosync 1.y.z or 2.y.z.

FILES

none

RELATED TO dog…

AUTHORS

This software is developed by the Sheepdog community which may be reached via mailing list at <[email protected]>.