Add ClearML Agent 1.9.0 release notes (#915)

docs/release_notes/ver_1_9.md

@@ -2,6 +2,43 @@
 title: Version 1.9
 ---
 
+### ClearML Agent 1.9.0
+
+**New Features and Improvements**
+* Add `NO_DOCKER` flag to `clearml-agent-services` entrypoint ([ClearML Agent GitHub PR #206](https://github.com/allegroai/clearml-agent/pull/206))
+* Use `venv` module if `virtualenv` is not supported
+* Find the correct python version when using a pre-installed python environment
+* Add `/bin/bash` support in the task's `script.binary` property
+* Add support for `.ipynb` script entry files (install nbconvert in runtime, convert file to python and execute the 
+python script). Includes `CLEARML_AGENT_FORCE_TASK_INIT` patching of `.ipynb` files (post-python conversion)
+* Add `CLEARML_MULTI_NODE_SINGLE_TASK` (values -1, 0, 1, 2) for easier multi-node single Task workloads
+* Add default docker `agent.default_docker.match_rules` configuration option (note: `matching_rules` are ignored if `--docker container` is passed in command line)
+* Add `-m module args` in script entry now supports standalone script. Standalone script is placed in a file specified 
+by the `working_dir` setting in the `<dir>:<target_file>` format (e.g. `:standalone.py`), or in `untitled.py` if not specified
+* Add `K8S_GLUE_POD_USE_IMAGE_ENTRYPOINT` env var to allow running k8s pods without overriding the image entrypoint 
+(useful for agents using prebuilt images in k8s)
+* Add venv cache mount override for non-root containers (use: `agent.docker_internal_mounts.venvs_cache`)
+* Add `/bin/bash -c "command"` support. Task binary should be set to `/bin/bash` and `entry_point` should be set to `-c command`
+* Add support for tasks containing only bash script or python module command
+* Add support for skipping container apt installs using `CLEARML_AGENT_SKIP_CONTAINER_APT` env var in k8s
+
+**Bug Fixes**
+* Fix git fetch did not update new tags ([ClearML Agent GitHub issue #209](https://github.com/allegroai/clearml-agent/issues/209))
+* Fix file mode should be optional in configuration `files` section
+* Fix `-m module $env` to support parsing `$env` before launching
+* Fix setting tasks that were just marked as `aborted` to `started` - only force task to `started` after dequeueing it, 
+otherwise do nothing
+* Fix slurm multi-node rank detection
+* Fix passing only `--docker` (i.e. no default container image) when using `--dynamic-gpus` feature
+* Fix logger object used even if `None`
+* Fix a race condition where in rare conditions popping a task from a queue that was aborted did not set it to `started` 
+before the watchdog killed it (not applicable in k8s/slurm)
+* Fix multi-node support to only send `pip freeze` update, only set task as `started`, and only update task status on exit for RANK 0
+* Fix do not cache venv cache if venv/python skip env var was set
+* Fix use same state transition in k8s if supported by the server (instead of stopping the task before re-enqueue)
+* Fix failed Task in services mode logged as `User aborted` instead of `failed`. Add Task state reason string
+* Fix remove task from pending queue and set to `failed` in k8s when applying the pod template fails
+
 ### ClearML SDK 1.9.3
 
 **Bug Fixes**