Add topic and partition statuses

[MikeEdgar]

Some initial experimentation with topic/partition statuses and handling offline partitions. PR targets #171 , but will be updated to main later.

Partition Status	Topic Status
Offline : leader is missing	Offline : all partitions Offline
	PartiallyOffline : has Offline partitions
UnderReplicated : has out-of-sync replica	UnderReplicated : has UnderReplicated partitions
FullyReplicated	FullyReplicated

Because the Admin client cannot fetch offsets for any partition of a topic where any of the partitions are offline, the API will not attempt to do so for Offline or PartiallyOffline topics. Similarly, replica localStorage will only be fetched for online partitions.

With one broker stopped:

Topic a_3 with replication factor of 1 has no leader (i.e. offline)

Broker restarted:

[riccardo-forina]

Thanks for this and for changing the to bits as well!

I left a single question, but LGTM

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
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91.0% Coverage
0.0% Duplication

[shirimordechay]

• Is there a way that we could show a tooltip (to the status) with the exact number of under-replicated/ offline partitions?
• I think Offline should be Error (red) instead of warning
• Tooltip text for the status column:
  Indicates the replication status of Kafka partitions. A partition is fully replicated when its replicas (followers) are 'in sync' with the designated partition leader. A partition is under-replicated if partition replicas (followers) are not 'in sync with their designated partition leader. If the status shows unavailable, some or all partitions are currently unavailable due to underlying issues.

[MikeEdgar]

Is there a way that we could show a tooltip (to the status) with the exact number of under-replicated/ offline partitions?

The individual status codes for each partition are available in the response from the backend API, so I think this could be done. << @riccardo-forina w.d.y.t?

I think Offline should be Error (red) instead of warning

That makes sense, any change in icon?

Tooltip text for the status column:
Indicates the replication status of Kafka partitions. A partition is fully replicated when its replicas (followers) are 'in sync' with the designated partition leader. A partition is under-replicated if partition replicas (followers) are not 'in sync with their designated partition leader. If the status shows unavailable, some or all partitions are currently unavailable due to underlying issues.

This should be fine, we can add this along with the other planned tooltips 👍

[shirimordechay]

See the example for the number of under-replicated https://miro.com/app/board/uXjVNbMAIcU=/?moveToWidget=3458764572936405853&cot=14. we can also address this in the mockup doc for prioritization if it is not trivial to implement.

Yes, the icon should be:
fa-exclamation-circle--
(Unicode: f06a)