Keiji Yoshida 791619d611 [ZEPPELIN-2950] Support Ceph as a notebook storage ... ### What is this PR for? Make Zeppelin support Ceph as a notebook storage. Ceph has APIs which are compatible with AWS S3 APIs. However, it supports only AWS Signature V2 and GetObject requests of aws-sdk-java use V4 by default: https://github.com/aws/aws-sdk-java/issues/372 According to https://github.com/aws/aws-sdk-java/issues/372#issuecomment-137299691 , the Zeppelin configuration of `zeppelin.notebook.s3.signerOverride` is added to make the `signerOverride` field of a `ClientConfiguration` instance configurable. ### What type of PR is it? [Improvement] ### Todos ### What is the Jira issue? * https://issues.apache.org/jira/browse/ZEPPELIN-2950 ### How should this be tested? Tested manually. ### 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: Keiji Yoshida <kjmrknsn@gmail.com> Closes #2598 from kjmrknsn/feature/ceph-support and squashes the following commits: c66cb63 [Keiji Yoshida] Support Ceph as a notebook storage		2017-10-14 15:41:49 -07:00
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configuration.md	[ZEPPELIN-2950] Support Ceph as a notebook storage	2017-10-14 15:41:49 -07:00
proxy_setting.md	[ZEPPELIN-2596] Improving documentation page	2017-06-23 17:44:13 +09:00
trouble_shooting.md	[ZEPPELIN-2596] Improving documentation page	2017-06-23 17:44:13 +09:00
upgrading.md	[ZEPPELIN-2596] Improving documentation page	2017-06-23 17:44:13 +09:00