chore: remove 2.4 support (including JMX exporter)

[razvan]

Description

Part of: stackabletech/issues#735

The product image has removed the JMX exporter jar already.

🟢 CI https://testing.stackable.tech/view/02%20Operator%20Tests%20(custom)/job/hbase-operator-it-custom/56/

Definition of Done Checklist

• Not all of these items are applicable to all PRs, the author should update this template to only leave the boxes in that are relevant
• Please make sure all these things are done and tick the boxes

Author

• Changes are OpenShift compatible
• CRD changes approved
• CRD documentation for all fields, following the style guide.
• Helm chart can be installed and deployed operator works
• Integration tests passed (for non trivial changes)
• Changes need to be "offline" compatible
• Links to generated (nightly) docs added
• Release note snippet added

Reviewer

• Code contains useful comments
• Code contains useful logging statements
• (Integration-)Test cases added
• Documentation added or updated. Follows the style guide.
• Changelog updated
• Cargo.toml only contains references to git tags (not specific commits or branches)

Acceptance

• Feature Tracker has been updated
• Proper release label has been added
• Links to generated (nightly) docs added
• Release note snippet added
• Add type/deprecation label & add to the deprecation schedule
• Add type/experimental label & add to the experimental features tracker

[razvan]

Release Note

Starting with this release, support for HBase 2.4.x has been removed. This includes metrics exposed via the JMX exporter. All supported HBase versions expose metrics via the built in Prometheus servlet.

[xeniape]

LGTM, just left a question

Also some things not part of the changed files:

• kuttl test opa/30-install-hbase.yaml.j2 line 32 contains some HBase 2.4 log4j.properties probably no longer needed
• monitoring documentation mentions "The old URL http://<master-service>:9100 is still available for HBase 2.4.", this can also be removed

[xeniape]

--- FAIL: kuttl (1959.43s)
    --- FAIL: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/smoke_hbase-2.6.2_hdfs-3.4.1_zookeeper-3.9.3_listener-class-cluster-internal_openshift-false (1359.96s)
        --- FAIL: kuttl/harness/smoke_hbase-2.6.1_hdfs-3.4.1_zookeeper-3.9.3_listener-class-cluster-internal_openshift-false (1360.72s)
        --- PASS: kuttl/harness/smoke_hbase-2.6.1_hdfs-3.4.1_zookeeper-3.9.3_listener-class-external-unstable_openshift-false (298.62s)
        --- FAIL: kuttl/harness/smoke_hbase-2.6.2_hdfs-3.4.1_zookeeper-3.9.3_listener-class-external-unstable_openshift-false (598.70s)
FAIL

Two of the tests are failing for me. The first one with

Create a table with compression=GZ
 ==============
command failure, skipping 1 additional commands

And the second one with

AssertionError: Metric 'table_requests_namespace_hbase_table_meta_table_write_query_per_second_count' not found for regionserver

[razvan]

AssertionError: Metric 'table_requests_namespace_hbase_table_meta_table_write_query_per_second_count' not found for regionserver

Thanks. I updated the test.

--- PASS: kuttl (688.14s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/smoke_hbase-2.6.2_hdfs-3.4.1_zookeeper-3.9.3_listener-class-cluster-internal_openshift-false (387.37s)
        --- PASS: kuttl/harness/smoke_hbase-2.6.1_hdfs-3.4.1_zookeeper-3.9.3_listener-class-cluster-internal_openshift-false (387.52s)
        --- PASS: kuttl/harness/smoke_hbase-2.6.2_hdfs-3.4.1_zookeeper-3.9.3_listener-class-external-unstable_openshift-false (298.98s)
        --- PASS: kuttl/harness/smoke_hbase-2.6.1_hdfs-3.4.1_zookeeper-3.9.3_listener-class-external-unstable_openshift-false (300.16s)
PASS

[xeniape]

There are still two remarks left here #672 (review). But let me know if they shouldn't be part of this PR, then I can just approve 👍

[razvan]

There are still two remarks left here #672 (review). But let me know if they shouldn't be part of this PR, then I can just approve 👍

I missed that comment. Done

[xeniape]

LGTM