Use configuration options to bind to all interfaces

[pfisterer]

What this PR does / why we need it:

It changes the configuration to use native Hadoop configuration options (cf. options for yarn and dfs) to bind to all interfaces instead of replacing the hostname with 0.0.0.0 using sed.

This avoids issues with webhdfs and URLs being generated that contain ...&namenoderpcaddress=0.0.0.0:9000&... instead of the hostname of the name node (e.g., ...&namenoderpcaddress=myrelease-hadoop-hdfs-nn:9000&...).

Special notes for your reviewer:

@danisla: I've tested this on a 4-node Kubernetes cluster without issues. I have deployed an instance of Apache Knox that exposes the webhdfs RESTful API for users outside of the cluster. After applying this fix, webhdfs access works.

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[pfisterer]

Increased the version number of the Chart.

[k8s-ci-robot]

@pfisterer: you can't request testing unless you are a kubernetes member.

In response to this:

/retest

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[pfisterer]

/assign @viglesiasce

[danisla]

@pfisterer I just tried it with the mapreduce test and Zeppelin steps in the NOTES.txt and it looks good!

LGTM

[pfisterer]

@danisla Tnx for looking into it

[timstoop]

/ok-to-test

[timstoop]

/assign

[pfisterer]

@danisla Are you interested in a pull request that (optionally) adds Apache Knox (https://knox.apache.org/) to this chart? This allows, amongst other things, to access HDFS from outside the Kubernetes cluster.

[unguiculus]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: pfisterer, unguiculus

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