Backend.ai

Features
* Display the architecture field in agent and image lists ([212](https://github.com/lablup/backend.ai-client-py/issues/212))
* Add `--depends` CLI option to the `start` & `session create` commands and the corresponding functional API arguments ([214](https://github.com/lablup/backend.ai-client-py/issues/214))

Fixes
* Fix missing propagation of `starts_at` and `bootstrap_script` arguments to the session creation API, which have been supported since v20.03 ([213](https://github.com/lablup/backend.ai-client-py/issues/213))
* Remove remaining traces of `keypair.concurrency_limit` which has been replaced with `keypair_resource_policy.max_concurrenct_sessions` ([215](https://github.com/lablup/backend.ai-client-py/issues/215))

Features
* Add storage proxy address overriding option ([194](https://github.com/lablup/backend.ai-client-py/issues/194))
* Print a jsonified result of mutation. ([198](https://github.com/lablup/backend.ai-client-py/issues/198))
* Refactor and move `ask_yn()` and other CLI user input validation functions to the backend.ai-cli package ([199](https://github.com/lablup/backend.ai-client-py/issues/199))
* Add a new functional API `vfolder.move_file()` and CLI command `vfolder mv` to move files and folders within a vfolder ([208](https://github.com/lablup/backend.ai-client-py/issues/208))
* Improve CLI error formatting to use more sensible "message" and "data" fields ([209](https://github.com/lablup/backend.ai-client-py/issues/209))

Fixes
* Fix a `KeyError` for `agent_list` when the user don't use the `--assign-agent` option against the managers without support for the option ([196](https://github.com/lablup/backend.ai-client-py/issues/196))
* Append a backup file extension to the `-i` option of `sed` command to prevent branch substitution errors when tested on macOS ([202](https://github.com/lablup/backend.ai-client-py/issues/202))
* Update the docs and help texts of vfolder mount options to reflect allowance of arbitrary paths. ([204](https://github.com/lablup/backend.ai-client-py/issues/204))
* Use the bgtask APIs to track progress of vfolder clone operation if available. ([205](https://github.com/lablup/backend.ai-client-py/issues/205))
* Relax the minimum required version of `attrs` from 21.2 to 20.3 to better support co-installation with other Python packages ([206](https://github.com/lablup/backend.ai-client-py/issues/206))

Miscellaneous
* Update CI workflows to install the matching version of PR and release branches of `backend.ai-cli` ([200](https://github.com/lablup/backend.ai-client-py/issues/200))
* Include Python 3.10 in the CI and make it officially supported ([210](https://github.com/lablup/backend.ai-client-py/issues/210))

Features
* Improve formatting of announcements using box-drawing characters and a Markdown formatter ([186](https://github.com/lablup/backend.ai-client-py/issues/186))
* Add support for session renaming ([189](https://github.com/lablup/backend.ai-client-py/issues/189))

Fixes
* Fix missing auto-creation of local-state directory when storing server announcements ([185](https://github.com/lablup/backend.ai-client-py/issues/185))
* Warn explicitly when there are missing args in the `session download` command ([191](https://github.com/lablup/backend.ai-client-py/issues/191))
* Fix a regression of "ssh" command due to command hierarchy reorganization ([192](https://github.com/lablup/backend.ai-client-py/issues/192))
* Remove bogus known-host checks when using `ssh` and `scp` commands ([193](https://github.com/lablup/backend.ai-client-py/issues/193))

Miscellaneous
* Update mypy to 0.930 ([190](https://github.com/lablup/backend.ai-client-py/issues/190))


Older changelogs

* [21.09](https://github.com/lablup/backend.ai-client-py/blob/21.09/CHANGELOG.md)
* [21.03](https://github.com/lablup/backend.ai-client-py/blob/21.03/CHANGELOG.md)
* [20.09](https://github.com/lablup/backend.ai-client-py/blob/20.09/CHANGELOG.md)
* [20.03](https://github.com/lablup/backend.ai-client-py/blob/20.03/CHANGELOG.md)

======================

---------------------

Fixes
* Prevent executing startup command multiple times for batch session. ([217](https://github.com/lablup/backend.ai-agent/issues/217))
* Fix the duplicate Docker event issue due to a misuse of the aidoocker API ([220](https://github.com/lablup/backend.ai-agent/issues/220))
* Fix blocking of subsequent lifecycle event processing by a hanging-up handler ([221](https://github.com/lablup/backend.ai-agent/issues/221))

---------------------

Fixes
* Improve stability under heavily loaded scenarios ([214](https://github.com/lablup/backend.ai-agent/issues/214))
- Skip lifecycle sync for already terminating kernels to reduce excessive Docker Engine overheads with a many number of being-terminated kernels
- Remove timeout for container termination for both self-terminated and user-requested cases
- Increase timeout for container termination to 60 seconds during restarting kernels, by observing deletion latencies under heavy load tests