Kibana stuck at kibana-waiter state. Unable to revive connection: http://elasticsearch:9200/"}

**Category:**
elastic-gke-logging
Kubernetes apps

Description

I am trying to deploy "elastic-gke-logging" on GKE, Elasticsearch and fluentd is working but kibana and kibana init job are facing issue as mentioned below. I am using following tag for all images.
gcr.io/cloud-marketplace/google/elastic-gke-logging/kibana:`6.8.13-20210321-144920`
```
{"type":"log","@timestamp":"2021-11-29T17:17:44Z","tags":["warning","elasticsearch","admin"],"pid":1,"message":"Unable to revive connection: http://elasticsearch:9200/"}
{"type":"log","@timestamp":"2021-11-29T17:17:44Z","tags":["warning","elasticsearch","admin"],"pid":1,"message":"No living connections"}
```

NAME READY STATUS RESTARTS AGE
efk-elasticsearch-0 2/2 Running 0 75m
efk-elasticsearch-1 2/2 Running 0 74m
efk-fluentd-es-5qm4c 1/1 Running 0 75m
efk-fluentd-es-lhhjb 1/1 Running 0 75m
efk-fluentd-es-z9xsg 1/1 Running 0 75m
```
efk-kibana-c4f94675d-vf48n 0/1 Running 10 32m
efk-kibana-init-job-c2d54 0/1 Init:0/1 0 32m
```

Please help regarding this issue.

Start with the reported Kibana logs, pod statuses, and the http://elasticsearch:9200/ endpoint in the GKE deployment. Trace why the Kibana pod and init job cannot establish a living Elasticsearch connection. Done means Kibana connects successfully and the init job completes instead of remaining stuck.

Written by the indexing model from the issue text.