[Apache] Some visualizations may become blank

[sakurai-youhei]

Affected visualizations:

• Uptime [Metrics Apache]
• Total accesses [Metrics Apache]
• Total egress [Metrics Apache]

Two problems:

1. The empty index_pattern makes them fall back to the default data view.
   -> [TSVB] Technical debt - remove default_index_pattern and default_timefield from model kibana#95925
2. The empty interval may result in fixed_interval": "10s", which is shorter than the default 30s polling interval.
   -> https://github.com/elastic/integrations/blob/main/packages/apache/data_stream/status/manifest.yml#LL12C18-L12C21

Workarounds:

1. Make metrics-* data view default from Kibana > Stack Management > Data Views.
2. Set shorter period such as 10s through Agent policy.

How to fix:

Set metrics-* to index_pattern and >=1m to interval explicitly. Preferably explicit @timestamp to time_field as well.

• Uptime [Metrics Apache] https://github.com/elastic/integrations/blob/main/packages/apache/kibana/visualization/apache-22057f20-3a12-11eb-8946-296aab7b13db.json#L35-L36
• Total accesses [Metrics Apache] https://github.com/elastic/integrations/blob/main/packages/apache/kibana/visualization/apache-47820ce0-3a1d-11eb-8946-296aab7b13db.json#L43-L44
• Total egress [Metrics Apache] https://github.com/elastic/integrations/blob/main/packages/apache/kibana/visualization/apache-99666080-3a20-11eb-8946-296aab7b13db.json#L43-L44

[elasticmachine]

Package apache - 1.8.2 containing this change is available at https://epr.elastic.co/search?package=apache