Release notes
=============


0.8.1 (2016-09-11)
------------------

- Explicitly add logging to /var/log/fc-qemu.log. Do not filter
  log output there: we always want all the information we can get.

0.8 (2016-09-08)
----------------

- Introduce `fc-qemu telnet` command: a shortcut to connect to the human
  monitor port without having to look up the port from a config manually.

- Switch the monitor automation from using the telnet port to using the QMP
  socket. This should be a _lot_ more reliable. This also fixes a previous
  race condition where a migration status check may intermittently fail and
  then break a migration unnecessarily.

- Update vagrant environment to check against Qemu 2.6.

- Revamp output formatting to use Hynek's great structlog library.

- Limit a few more commands to specific VM states: stop only when running.

- Implement IOPS limiting either based on VM-specific ENC data,
  a Ceph pool default, or a global default. This limits IOPS for all disks
  (individually, no groups, yet) in a VM and maintains this over time.

- Rework Ceph volume unlocking: if a client owns a lock then breaking it
  will cause an immediate disconnect of the rbd/rados connection to avoid
  it sending further data updates. This can happen to us if we're setting
  up the locks on an inmigration and then have to give them up again if the
  migration fails.

0.7.22 (2016-07-21)
-------------------

- Fix bug in `fc-qemu restart` which causes mkfs.xfs for tmp to fail.


0.7.21 (2016-06-20)
-------------------

- Moderate swap and tmp volume sizes so that they do not scale linearly for very
  large VMs. #21961


0.7.20 (2016-05-03)
-------------------

- More logging output to help diagnosing a rare lock recovery failure
  (#21345).
- Remove shrink-vm. R.I.P. (#14222).


0.7.19 (2016-04-08)
-------------------

- Fix a race condition: when continuously polling monitor status to determine
  whether a VM is running, also consider the option that the VM was about
  to shutdown and the monitor has gone away.


0.7.18 (2016-04-04)
-------------------

- Another brownbag release: the snapshot refactoring wasn't tested properly
  if snapshots actually existed.


0.7.17 (2016-04-04)
-------------------

- Fix unicode/str issue: consul json decoded into unicode but librbd requires
  a plain string.

0.7.16 (2016-03-31)
-------------------

- Fix regression in snapshot taking.


0.7.15 (2016-03-20)
-------------------

- Account for different mkfs options for XFS and mkfs.ext4 (#19079).
- Improved Vagrant VM bootstrapping.
- Refactor classes in hazmat/{ceph.py,volume.py} (#19079).
- Use the "rbd_pool" ENC option to allow VM-specific selection of the RBD pool
  instead of deriving it from the resource group name.
- Improve success rate of recovering from failed migrations properly: certain
  conditions would result in only partially released locks from the target
  leading to inconsistent states.

0.7.14 (2016-01-21)
-------------------

- Use XFS for tmp partitions (#17873).
- Drop super-floppy setup von vdc and use a proper partition table instead
  (#17873).
- Fix file permissions for ENC seed JSON file.


0.7.13 (2015-12-10)
-------------------

- Ignore consul requests for VMs with missing configuration (#18841).
- Speed up initial NTP sync in Vagrant to avoid failing Ceph tests due to
  unsynced MONs.
- Refine Ceph.unlock() to remove own locks in a best-effort manner. This is
  needed to recover from incomplete migrations (#18771).
- Improve error handling with failed monitor connections.


0.7.12 (2015-11-11)
-------------------

- Improve error handling during migration.
- Fix timeout during fsfreeze that leads to locked up VMs (#18917).


0.7.11 (2015-11-04)
-------------------

- Switch `aio` setting in default qemu.vm.cfg to "threads". This will keep
  fc-qemu compatible with future Qemu versions (#18743).
- Improve logging.
- Place initial copy of ENC data in `/tmp/fc-data/enc.json`.


0.7.10 (2015-08-12)
-------------------

- Refactor system-wide configuration code.
- Create swap and tmp partition with proper filesystem labels (#16783).
- Fix rare race condition during tmp volume creation.
- Set filesystem labels for swap and tmp volumes (#17078).


0.7.9 (2015-08-03)
------------------

- Add "snapshot" command. Can be triggered from command line and
  via consul.


0.7.8 (2015-07-27)
------------------

- Improve detection of running instances.

- Broaden check for monitor connection to handle dual stack
  environments.


0.7.7 (2015-07-14)
------------------

- Fix migration issue: we ended up de-registering at the wrong time.


0.7.6 (2015-07-01)
------------------

- Quickfix: newer mkfs.ext4 versions need a '-F' flag to overwrite
  filesystems (#14920).


0.7.5 (2015-07-01)
------------------

- Spawn individual VM actions usings multiprocessing. Wait until all migrations
  are done (#14920).
- Increase allowed migration downtime to keep migration time for busy VMs in
  bounds (#14920).
- Fix exception handling errors during Consul event processing (#14920).
- Give udev mapping a bit to settle.
- Improve log readability.


0.7.4 (2015-06-02)
------------------

- Rectify brown-bag release.
- Fix some unnoticed, arbitrary test failures.


0.7.3 (2015-06-02)
------------------

- Make event processing from consul fork for each VM and return the
  master process early to avoid blocking the consul agent.

- More logging related to migrations.


0.7.2 (2015-05-26)
------------------

- Adapt to QEMU 2.2.1: uses now stdvga by default (#15748).


0.7.1 (2015-05-20)
------------------

- Fix bug with inmigration Consul service registration (#15313).
- Change KV name name space for nodes from "vm/" to "node/" (#14920).


0.7 (2015-05-18)
----------------

- Consul service registration (#15313).
- Coordinate migration via Consul (#15313).


0.6.4 (2015-02-27)
------------------

- Tolerate "setup" as an intermediate migration status as encountered in the
  wild.


0.6.3 (2015-02-19)
------------------

- Improve pid file parser to deal correctly with trailing lines and empty pid
  files.
- Ensure that exceptions are properly logged if they occur directly after
  daemonizing (e.g., in Agent.__init__()) (#13867).


0.6.2 (2015-01-22)
------------------

- Relax PyYaml and psutil version requirements to accommodate to the Flying
  Circus managed platform.


0.6.1 (2015-01-22)
------------------

- Improve logging and error messages (#13867).
- Fix unwanted behaviour during error conditions (#13867).


0.6 (2015-01-15)
----------------

- Implement live migration. Use "inmigrate" and "outmigrate" commands
  to coordinate the process (#13229).
- Note that the qemu.cfg.in template has changed!
- Improve test coverage.


0.5.1 (2014-11-22)
------------------

- Bugfix: remove Ceph discard call since it seems to be unstable (#13414).
- Improve operability by reworking what is logged to fc-qemu.log.


0.5 (2014-11-21)
----------------

- Root filesystem shrink during VM start (#13414).
- Add 'force-unlock' action to break stale locks (e.g., after a VM host went
  down).


0.4.3 (2014-11-13)
------------------

- Read Qemu config file template from `/etc/qemu/qemu.vm.cfg.in`.
- Fix tests and documentation.


0.4.2 (2014-11-12)
------------------

- Rate limit entropy transfer from host to guest (#13751).
- Add 'restart' command to simplify VM restarts.


0.4.1 (2014-09-24)
------------------

- Do not require the PID to match the machine name for determining
  online status. This caused issues for VMs with names longer than 11
  characters: http://status.flyingcircus.io/incidents/3j8wsrszlx2w


0.4 (2014-09-16)
----------------

- Allow selecting the specific command line to call for creating a VM
  using a config file + formatting syntax.

- Add test coverage to show that we gracefully recover from crashed VMs
  upon a subsequent 'ensure'.

0.3 (2014-09-13)
----------------

- Refactor and rename to 'fc.qemu'.
  Integrate most functionality that was previously placed in our
  init scripts and localconfig (fc.agent) utilities.

- Add a lot of test coverage.


0.2.6 (2014-08-21)
------------------

- Fix incoming VM detection for an already locked _and_ started VM.


0.2.5 (2014-08-20)
------------------

* Implement a safety-belt to prohibit migrating VMs that have not
  yet been started with the supported /run/kvm.*.cfg.in format.

