[pve-devel] [PATCH v3 qemu-server++ 0/21] remote migration

Fabian Grünbichler f.gruenbichler at proxmox.com
Wed Dec 22 14:52:36 CET 2021

this series adds remote migration for VMs.

both live and offline migration including NBD and storage-migrated disks should
work. groundwork for extending to pve-container and pvesr already laid.

new in v3: lots of refactoring and edge-case handling

new in v2: dropped parts already applied, incorporated Fabian's and
Dominik's feedback (thanks!)

new in v1: explicit remote endpoint specified as part of API call instead of

overview over affected repos and changes, see individual patches for
more details.


new tunnel helper tool for forwarding commands and data over websocket
connections, required by pve-guest-common on source side


new/refactored generic WS/SSH tunnel fork/read/.. helpers
new storage migration over WS tunnel helpers


refactor storage_migrate to make code-reuse possible


some refactoring, new mtunnel endpoints, new remote_migration endpoints
TODO: handle pending changes and snapshots
TODO: proper CLI for remote migration
TODO: handle C^c
TODO: strict parser for FW config as well?
potential TODO: precond endpoint?

as usual, some of the patches are best viewed with '-w', especially in

required dependencies are noted


Fabian Grünbichler (3):
  migrate: handle migration_network with remote migration
  add tunnel helper module
  add storage tunnel module

 src/Makefile               |   2 +
 debian/control             |   1 +
 src/PVE/AbstractMigrate.pm |  37 ++--
 src/PVE/StorageTunnel.pm   | 231 ++++++++++++++++++++++++
 src/PVE/Tunnel.pm          | 356 +++++++++++++++++++++++++++++++++++++
 5 files changed, 611 insertions(+), 16 deletions(-)
 create mode 100644 src/PVE/StorageTunnel.pm
 create mode 100644 src/PVE/Tunnel.pm


Fabian Grünbichler (4):
  initial commit
  add tunnel implementation
  add fingerprint validation
  add packaging


Fabian Grünbichler (10):
  refactor map_storage to map_id
  schema: use pve-bridge-id
  parse_config: optional strict mode
  update_vm: allow simultaneous setting of boot-order and dev
  nbd alloc helper: allow passing in explicit format
  migrate: move tunnel-helpers to pve-guest-common
  mtunnel: add API endpoints
  migrate: refactor remote VM/tunnel start
  migrate: add remote migration handling
  api: add remote migrate endpoint

 PVE/API2/Qemu.pm                      | 721 ++++++++++++++++++++++++-
 PVE/QemuMigrate.pm                    | 738 ++++++++++++++++----------
 PVE/QemuServer.pm                     | 100 ++--
 debian/control                        |   2 +
 test/MigrationTest/QemuMigrateMock.pm |  28 +-
 5 files changed, 1240 insertions(+), 349 deletions(-)


Fabian Grünbichler (4):
  volname_for_storage: parse volname before calling
  storage_migrate: pull out snapshot decision
  storage_migrate: pull out import/export_prepare
  add volume_import/export_start helpers

 PVE/Storage.pm | 205 ++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 153 insertions(+), 52 deletions(-)

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