- Add PipelineDecorator (`PipelineDecorator.pipeline` and `PipelineDecorator.component` decorators for full custom pipeline logic)
- Add xgboost auto metric logging [ClearML GitHub issue #381](https://github.com/allegroai/clearml/issues/381)
- Add `sdk.storage.log.report_upload_chunk_size_mb` and `sdk.storage.log.report_download_chunk_size_mb` configuration options to control upload/download log reporting [ClearML GitHub issue #424](https://github.com/allegroai/clearml/issues/424)
- Add new optional `auto_connect_frameworks` argument value to `Task.init()` (e.g. `auto_connect_frameworks={'tfdefines':False}`) to allow disabling TF defines [ClearML GitHub issue #408](https://github.com/allegroai/clearml/issues/408)
- Add support for `CLEARNL_CONFIG_VERBOSE` environment variable to allow external control over verbosity of the configuration loading process
- Add support for uploading artifacts with a list of files using `Task.upload_artifcats(name, [Path(), Path()])`
- Add missing *clearml-task* parameters `--docker_args`, `--docker_bash_setup_script` and `--output-uri`
- Change `CreateAndPopulate` will auto list packages imported but not installed locally
- Add `clearml.task.populate.create_task_from_function()` to create a Task from a function, wrapping function input arguments into hyper-parameter section as kwargs and storing function results as named artifacts
- Add support for Task serialization (e.g. for pickle)
- Add `Task.get_configuration_object_as_dict()`
- Add `docker_image` argument to `Task.set_base_docker()` (deprecate `docker_cmd`)
- Add `auto_version_bump` argument to `PipelineController`
- Add `sdk.development.detailed_import_report` configuration option to provide a detailed report of all python package imports
- Set current Task as Dataset parent when creating dataset
- Add support for deferred configuration
- Examples
- Add Pipeline v2 examples
- Add `TaskScheduler` and `TriggerScheduler` examples
- Add pipeline controller callback example
- Improve existing examples and docstrings
**Bug Fixes**
- Fix poltly plots converting `NaN` to `nan` instead of `null` [ClearML GitHub issue #373](https://github.com/allegroai/clearml/issues/373)
- Allow rewriting SSH URLs (see [here](https://github.com/allegroai/clearml-agent/commit/9456e493ac6d6495310ee084db906f9cdca8218c)), refers to [ClearML Agent GitHub PR #72](https://github.com/allegroai/clearml-agent/pull/72), [ClearML Agent GitHub issue #42](https://github.com/allegroai/clearml-agent/issues/42)
- Add docker environment arguments log masking support, customizable using the `agent.hide_docker_command_env_vars` configuration value (see [here](https://github.com/allegroai/clearml-agent/blob/db57441c5dda43d8e38f01d7f52f047913e95ba5/docs/clearml.conf#L172)) [ClearML Agent GitHub issue #67](https://github.com/allegroai/clearml-agent/issues/67)
- Add support for naming docker containers using the `agent.docker_container_name_format` configuration option to set a name format (disabled by default) [ClearML issue #412](https://github.com/allegroai/clearml/issues/412)
- k8s glue
- Remove queue name from pod name, add queue name and ID to pod labels [ClearML Agent GitHub issue #64](https://github.com/allegroai/clearml-agent/issues/64)
- Update task `status_message` for non-responsive or hanging pods
- Support the `agent.docker_force_pull` configuration option for scheduled pods
- Add docker example for running the k8s glue as a pod in a k8s cluster
- Add `agent.ignore_requested_python_version` configuration option to ignore any requested python version (default false, see [here](https://github.com/allegroai/clearml-agent/blob/db57441c5dda43d8e38f01d7f52f047913e95ba5/docs/clearml.conf#L45))
- Add `agent.docker_internal_mounts` configuration option to control containers internal mounts (non-root containers, see [here](https://github.com/allegroai/clearml-agent/blob/db57441c5dda43d8e38f01d7f52f047913e95ba5/docs/clearml.conf#L184))
- Add support for `-r requirements.txt` in the Installed Packages section
- Add support for `CLEARML_AGENT_INITIAL_CONNECT_RETRY_OVERRIDE` environment variable to override initial server connection behavior (defaults to true, allows boolean value or an explicit number specifying the number of connect retries)
- Add support for `CLEARML_AGENT_DISABLE_SSH_MOUNT` environment variable allowing to disable the auto `.ssh` mount into the docker
- Add support for `CLEARML_AGENT_SKIP_PIP_VENV_INSTALL` environment variable to skip Python virtual env installation on execute and allow providing a custom venv binary
- Add support for `CLEARML_AGENT_VENV_CACHE_PATH` environment variable to allow overriding venv cache folder configuration
- Add support for `CLEARML_AGENT_EXTRA_DOCKER_ARGS` environment variable to allow overriding extra docker args configuration
- Add support for environment variables containing bash-style string lists using shlex
- Add printout when using ClearML key/secret from environment variables
- Increase worker keep-alive timeout to 10 minutes instead of 1 minute
- Update documentation
**Bug Fixes**
- Fix auto mount `SSH_AUTH_SOCK` into docker [ClearML Agent GitHub issue #45](https://github.com/allegroai/clearml-agent/issues/45)
- Fix file server `GET` response for gzipped data-files contains `Content-Encoding: gz` header, causing clients to automatically decompress the file [ClearML GitHub issue #411](https://github.com/allegroai/clearml/issues/411)
- Fix server error when running with non-migrated v0.16 ElasticSearch data [Slack Channel](https://clearml.slack.com/archives)/CTK20V944/p1627911579075600
