### What is this PR for?
Trivial change for configuration name change.
### What type of PR is it?
[Refactoring]
### Todos
* [ ] - Task
### What is the Jira issue?
* No jira created
### How should this be tested?
* First time? Setup Travis CI as described on https://zeppelin.apache.org/contribution/contributions.html#continuous-integration
* Strongly recommended: add automated unit tests for any new or changed behavior
* Outline any manual steps to test the PR here.
### 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: Jeff Zhang <zjffdu@apache.org>
Closes#2620 from zjffdu/minor_refactoring and squashes the following commits:
c68ce76 [Jeff Zhang] [MINOR][Code Refactoring] Configuration name change for keytab and principal used for FileSystemNotebookRepo
### What is this PR for?
This is a refactoring PR of ZEPPELIN-1515. Because hadoop's FileSystem API not only works with hdfs, but also other hadoop compatible filesystem. So in this PR I rename it to `FileSystemNotebookRepo`
### What type of PR is it?
[Refactoring]
### Todos
* [ ] - Task
### What is the Jira issue?
* https://issues.apache.org/jira/browse/ZEPPELIN-2933
### Questions:
* Does the licenses files need update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? No
Author: Jeff Zhang <zjffdu@apache.org>
Closes#2588 from zjffdu/ZEPPELIN-2933 and squashes the following commits:
45d1e9b [Jeff Zhang] ZEPPELIN-2993. Code Refactoring of ZEPPELIN-1515 follow up
### What is this PR for?
This PR is trying to add hdfs as another implementation for `NotebookRepo`. There's another PR about using webhdfs to implement that. Actually hdfs client library is compatibility cross major versions. See http://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-common/Compatibility.html#Wire_compatibility, if using webhdfs, the code become more complicated and may lose some features of hdfs.
This PR is also required for HA of zeppelin, so that multiple zeppelin instances can share notes via hdfs. I add hadoop-client in pom file. So zeppelin will package hadoop client jar into its binary distribution. This is because zeppelin may be installed in a gateway machine where no hadoop is installed (only hadoop configuration file is existed in this machine) And since the hadoop client will work with multiple versions of hadoop, so it is fine to package into binary distribution. Spark also package hadoop client jar in its binary distribution.
### What type of PR is it?
[Feature]
### Todos
* [ ] - Task
### What is the Jira issue?
* https://issues.apache.org/jira/browse/ZEPPELIN-1515
### How should this be tested?
Unit test is added. Also manually verify it in a single node cluster.
### 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: Jeff Zhang <zjffdu@apache.org>
Closes#2455 from zjffdu/ZEPPELIN-1515 and squashes the following commits:
b3e83ab [Jeff Zhang] ZEPPELIN-1515. Notebook: HDFS as a backend storage (Read & Write Mode)
### What is this PR for?
Improving documentation page. Please check *TODO* and *Screenshots* sections for detail.
The motivation is described in [the JIRA ticket](https://issues.apache.org/jira/browse/ZEPPELIN-2583) and discussion is ongoing on the mailing list.
### What type of PR is it?
[Improvement | Documentation]
### Todos
* [x] - improved the navbar style
* [x] - improved the main page
* [x] - re-organized content structure
* [x] - added tutorial pages: `spark_with_zeppelin.md`, `python_with_zeppelin.md`, `sql_with_zeppelin.md` for overview
* [x] - added `multi_user_support.md` page to provide overview
* [x] - added the empty `interpreter_binding_mode` page. This will be handed in the different issue: [ZEPPELIN-2582](https://issues.apache.org/jira/browse/ZEPPELIN-2582)
* [x] - added the empty `trouble_shooting` page. This can be filled in the following PRs.
* [x] - added the empty `useful_developer_tools` page. This can be filled in the following PRs.
### What is the Jira issue?
[ZEPPELIN-2596](https://issues.apache.org/jira/browse/ZEPPELIN-2596)
### How should this be tested?
1. checkout
2. `cd docs`
3. `bundle install` (make sure that you have ruby 2.1.0+ and bundle)
4. `bundle exec jekyll serve --watch`
5. open `localhost:4000`
### Screenshots (if appropriate)
#### better navbar: before
#### better navbar: after
#### improved main page: before
#### improved main page: after
#### organized content structure: before
#### organized content structure: after
### Questions:
* Does the licenses files need update? - NO
* Is there breaking changes for older versions? - NO
* Does this needs documentation? - related with docs
Author: 1ambda <1amb4a@gmail.com>
Closes#2371 from 1ambda/updating-version-doc and squashes the following commits:
eb02fa967 [1ambda] fix: navbar focus color applies after folding
026379ed6 [1ambda] fix: Remove docs/.listen_test
a7dd4737b [1ambda] fix: sora's comment 1.2
18c5058f7 [1ambda] fix: resolve description in python_with_zeppelin.md
d3ad67c73 [1ambda] fix: sora's comment 4
d133dbbcc [1ambda] fix: resolve sora's comment 3
513c6ff2c [1ambda] fix: resolve sora's comment 1.1
4c2946928 [1ambda] fix: resovle sora's comment 2
1c3946ac6 [1ambda] fix: sora's comment 1
4d6e4267f [1ambda] fix: Resolve sola's comment 3
d0524cafe [1ambda] fix: Set less shadow for nav
5f1f998ba [1ambda] docs: Add useful_develop_tools.md
9dfd62c74 [1ambda] fix: Typo in installation.md
30f7d7e06 [1ambda] fix: Typo in helium ctrl
d6877e792 [1ambda] docs: Add python_with_zeppelin.md
7027e96c0 [1ambda] docs: Improve python conda, docker doc style
e55b50a9d [1ambda] fix: Invalid URLs
75ddeeaff [1ambda] docs: replace URIs in interpreter
5b43993a4 [1ambda] docs: Add sql_with_zeppelin
053794e84 [1ambda] docs: Add spark_with_zeppelin.md
d4d88b9c7 [1ambda] docs: Improve proxy doc
b46cdd126 [1ambda] docs: Add empty interpreter_binding_mode.md
06fcb239e [1ambda] docs: Add empty personalized_mode.md
4991cf0a7 [1ambda] docs: Update upgrading.md
53142b7a0 [1ambda] fix: Simplify install.md
8a5c1e721 [1ambda] docs: Add multi_user_support.md
34095775e [1ambda] fix: Increase font size to 15px
a03b04b33 [1ambda] fix: Remove sample text from trouble_shooting.md
199842590 [1ambda] fix: Remove docker doc link
66a2a7d26 [1ambda] docs: Improve impersonation page
0a6e3fc1d [1ambda] docs: Improve install doc
ccd999ed5 [1ambda] docs: Improve helium doc
f8d742d08 [1ambda] fix: an invalid link in navbar
b7aa5f884 [1ambda] fix: URLs in development
61a175d94 [1ambda] docs: Update install.md
4c56de5c4 [1ambda] fix: URLs in setup
0b1d63513 [1ambda] fix: URLs in quickstart
28970a4fe [1ambda] feat: Add docs/usage
735946bca [1ambda] feat: rename /quickstart
b351cf237 [1ambda] fix: Add missing links
b70770b4f [1ambda] feat: Change URLs in nav, index
94e80aef6 [1ambda] fix: doens't display navbar version in small
6e0cab110 [1ambda] feat: Update doc section names
b9ce256ff [1ambda] feat: Hide version in navbar when md
f8bab52be [1ambda] fix: Better image display in index.md
eeb37d5b5 [1ambda] fix: Add RL padding for mobile browser
ceb60b5ee [1ambda] feat: Style collapsed nav for mobile browser
4ebafb4b6 [1ambda] commit
