commit 1ec1561569f708603ebe97f1f2190c697ef2e949
author rick <rick@rickdeMacBook-Pro.local> Wed Jul 14 11:28:03 2021 +0800
committer Philipp Dallig <philipp.dallig@gmail.com> Tue Sep 07 14:26:00 2021 +0200
tree 02067df218d3be4d2131659b4d03a7e0e805b37f
parent ba766944b96308f117d488803a0d3a529b488dc6

[ZEPPELIN-5444] Allow users to set service account for interpreter

### What is this PR for?
Currently, users cannot set the service account for the interpreter pod under k8s mode. And there is no service account defined in the pod `spec` in `k8s/interpreter/100-interpreter-spec.yaml`. According to the documentation of Kubernetes (<https://kubernetes.io/docs/tasks/configure-pod-container/configure-service-account/>):
> When you create a pod, if you do not specify a service account, it is automatically assigned the **default** service account in the same namespace.

, which means that currently the interpreter pod can only use the default service account.

In order to allow users to directly set the service account for the interpreter pod in the interpreter settings, this PR adds a k8s template property, named `zeppelin.k8s.interpreter.serviceAccount`.

Example usage:
```
%spark.conf
zeppelin.k8s.interpreter.serviceAccount yourServiceAccount
```

Note that the `k8s/interpreter/100-interpreter-spec.yaml` creates a **role binding** when using the spark interpreter. It was originally directly bound to the default service account. This PR makes it bind to the service account set by user.

### What type of PR is it?
[Improvement]

### Todos
* [ ] - Task

### What is the Jira issue?
* <https://issues.apache.org/jira/browse/ZEPPELIN-5444>

### How should this be tested?
* CI pass and manually tested

### Screenshots (if appropriate)

### Questions:
* Does the licenses files need update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? No

Author: rick <rick@rickdeMacBook-Pro.local>

Closes #4172 from rickchengx/ZEPPELIN-5444 and squashes the following commits:

c8522f497 [rick] update docs
19bbfb0f7 [rick] [ZEPPELIN-5444] Allow users to set service account for interpreter