[HDFS-16157] Support configuring DNS record to get list of journal nodes.

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Resolved
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: journal-node
• Labels: pull-request-available
• Target Version/s: 3.4.0
• Hadoop Flags: Reviewed
• Assignee: Leon Gao
• Reporter: Leon Gao
• Created: 10/Aug/21 06:31
• Updated: 27/Jan/24 02:39
• Resolved: 26/Aug/21 00:41

Description

We can use a DNS round-robin record to configure list of journal nodes, so we don't have to reconfigure everything journal node hostname is changed. For example, in some containerized environment the hostname of journal nodes can change pretty often.

Issue Links

• relates to: HDFS-15831 Adopt more DNS resolving for HDFS
• links to: GitHub Pull Request #3284