merge revision(s) 46b544c54955348ef1ea9692b837b061f59f91cd, d3abee739f4feb91bb9aaae33877d70c8c576db0: [Backport #21095]
Prefer `uname -n` over `hostname`. (#12647) Add fallback for `hostname` if `uname` isn't available. (#12655)
merge revision(s) 46b544c54955348ef1ea9692b837b061f59f91cd, d3abee739f4feb91bb9aaae33877d70c8c576db0: [Backport #21095]