hostname could have more than 64 characters

[kezhuw]

Description

hostname gives fv-az1272-448.grsihaubamwerhiryzjrxtypna.phxx.internal.cloudapp.net which is longer than 64 characters. Some tools, say OpenSSL, refuses these hostnames.

Platforms affected

• Azure DevOps
• GitHub Actions - Standard Runners
• GitHub Actions - Larger Runners

Runner images affected

• Ubuntu 20.04
• Ubuntu 22.04
• Ubuntu 24.04
• macOS 12
• macOS 13
• macOS 13 Arm64
• macOS 14
• macOS 14 Arm64
• Windows Server 2019
• Windows Server 2022

Image version and build link

https://github.com/kezhuw/zookeeper/actions/runs/10831378697/job/30053388552

The first job step runs hostname -f.

Is it regression?

Not sure.

Expected behavior

Hostnames must be less than 63 characters in length per Section 2.3.4 of the Domain Names Specification RFC.

https://docs.github.com/en/[email protected]/admin/configuring-settings/configuring-network-settings/configuring-the-hostname-for-your-instance

Actual behavior

hostname gives fv-az1272-448.grsihaubamwerhiryzjrxtypna.phxx.internal.cloudapp.net which is longer than 64 characters.

Repro steps

Adds a job step to output hostname.

[kishorekumar-anchala]

Hi @kezhuw ,

Thank you for bringing this issue to us. We are looking into this issue and will update you on this issue after investigating.