[GitHub] [airflow] kunalyogenshah opened a new pull request #5164: [AIRFLOW-4396] Provide a link to external Elasticsearch logs in UI.

[GitBox <gi...@apache.org>]

kunalyogenshah opened a new pull request #5164: [AIRFLOW-4396] Provide a link to external Elasticsearch logs in UI.
URL: https://github.com/apache/airflow/pull/5164
 
 
   ### Jira
   
   - [ ] My PR addresses the following:
     - https://issues.apache.org/jira/browse/AIRFLOW-4396
   
   ### Description
   
   - [x] Here are some details about my PR, including screenshots of any UI changes:
   This PR adds a new button to the Airflow UI next to "View log" ("View log in ES"). It provides an external URL for visualizing the log, and renders the latest try for the Task, DAG and execution being looked up. This button is controlled by a new `elasticsearch_frontend` conf param, which provides the template URL for viewing the corresponding log. Screenshot below :
   
   ![Screen Shot 2019-04-23 at 2 54 15 PM](https://user-images.githubusercontent.com/5075200/56618520-b4f77100-65d7-11e9-99a8-37c4c9577407.png)
   
   Documentation update is pending code review. Will update documentation after.
   
   ### Tests
   
   - [x] My PR adds the following unit tests __OR__ does not need testing for this extremely good reason:
   Unit tested the UI and checked the console for errors in the JS. Button doesn't show up if the param is not defined.
   
   ### Commits
   
   - [x] My commits all reference Jira issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "[How to write a good git commit message](http://chris.beams.io/posts/git-commit/)":
     1. Subject is separated from body by a blank line
     1. Subject is limited to 50 characters (not including Jira issue reference)
     1. Subject does not end with a period
     1. Subject uses the imperative mood ("add", not "adding")
     1. Body wraps at 72 characters
     1. Body explains "what" and "why", not "how"
   
   ### Documentation
   
   - [ ] In case of new functionality, my PR adds documentation that describes how to use it.
     - All the public functions and the classes in the PR contain docstrings that explain what it does
     - If you implement backwards incompatible changes, please leave a note in the [Updating.md](https://github.com/apache/airflow/blob/master/UPDATING.md) so we can assign it to a appropriate release
   
   ### Code Quality
   
   - [ ] Passes `flake8`
   

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