This issue will be used to track 0.7.2 release.

• bump version to 0.7.2 (bump version to 0.7.2 #5066)
  • In python/ray/__init.py: (bump version to 0.7.2 #5066)
  • In src/ray/raylet/main.cc: (Update VersionKey in raylet to 0.7.2 #5070)
• bump version to 0.8.0.dev2 (Bump version to 0.8.0.dev2 #5069)
• Create a release branch (https://github.com/ray-project/ray/tree/releases/0.7.2)
• Run stress test.
  • Stress tests passed
  • Application stress tests
    • Impala tests passed (in python2.7, we have to apply a workaround [rllib] Fails to install atari-py in python2.7 #5095)
    • SGD tests skipped (on path to deprecation [SGD] Deprecate old TF SGD code #5093)
• Resolve release blockers
  • Not aware of any release blockers
• Download wheels, check they can be installed

• Final testing on Ubuntu and MacOS
• Upload to PyPI Test
  • So it's installable via pip install --index-url https://test.pypi.org/simple/ ray
• Upload to PyPI
• Create a GitHub Release
  • Draft release note
• Update version numbers throughout codebase (Closed by Update wheels to 0.8.0dev2 #5186)
• Improve release process (Closed by Improve release process 0.7.2 #5187)