HDFS-15814. Make some parameters configurable for DataNodeDiskMetrics…

[tomscut]

JIRA: HDFS-15814

This change was fixed in trunk (3.4.0). The commit does not apply cleanly to branch-3.3, so I create a new PR.

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	21m 15s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
-1 ❌	test4tests	0m 0s		The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
			_ branch-3.3 Compile Tests _
+1 💚	mvninstall	30m 44s		branch-3.3 passed
+1 💚	compile	1m 18s		branch-3.3 passed
+1 💚	checkstyle	1m 7s		branch-3.3 passed
+1 💚	mvnsite	1m 45s		branch-3.3 passed
+1 💚	javadoc	1m 42s		branch-3.3 passed
+1 💚	spotbugs	4m 7s		branch-3.3 passed
+1 💚	shadedclient	24m 3s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	1m 29s		the patch passed
+1 💚	compile	1m 17s		the patch passed
+1 💚	javac	1m 17s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 51s		hadoop-hdfs-project/hadoop-hdfs: The patch generated 0 new + 610 unchanged - 2 fixed = 610 total (was 612)
+1 💚	mvnsite	1m 24s		the patch passed
+1 💚	xml	0m 2s		The patch has no ill-formed XML file.
+1 💚	javadoc	1m 37s		the patch passed
+1 💚	spotbugs	4m 5s		the patch passed
+1 💚	shadedclient	23m 43s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
-1 ❌	unit	197m 59s	/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs in the patch passed.
+1 💚	asflicense	0m 46s		The patch does not generate ASF License warnings.
		315m 8s

Reason	Tests
Failed junit tests	hadoop.hdfs.TestStripedFileAppend
	hadoop.hdfs.TestGetFileChecksum
	hadoop.hdfs.server.blockmanagement.TestUnderReplicatedBlocks

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3021/1/artifact/out/Dockerfile
GITHUB PR	#3021
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell xml
uname	Linux 6f0b6552be6d 4.15.0-58-generic #64-Ubuntu SMP Tue Aug 6 11:12:41 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	branch-3.3 / dec9a7c
Default Java	Private Build-1.8.0_292-8u292-b10-0ubuntu1~18.04-b10
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3021/1/testReport/
Max. process+thread count	2948 (vs. ulimit of 5500)
modules	C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3021/1/console
versions	git=2.17.1 maven=3.6.0 spotbugs=4.2.2
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[tomscut]

Hi @jojochuang @dineshchitlangia , I created a new PR for branch-3.3, could you please help to review the code? The failed tests are not related.

[jojochuang]

Thanks @tomscut

[tomscut]

Thanks @tomscut

Thanks @jojochuang for the merge.