Dimitris Athanasiou 15e53280dc [ML] Allow datafeed to start when job is opening (elastic/x-pack-elasticsearch#1611)
The goal of this change is to allow datafeeds to start
when the job is in the opening state. This makes the API
more async and it allows clients like the ML UI to open a
job and start its datafeed without having to manage the
complexity of dealing with timeouts due to the job taking
time to open due to restoring a large state.

In order to achieve this, this commit does a number of things:

  - accepts a start datafeed request when the job is opening
  - adds logic to the DatafeedManager to wait before running the
  datafeed task until the job is opened
  - refactord the datafeed node selection logic into its own class
  - splitd selection issues in critical and non-critical with regard
  to creating the datafeed task
  - refactord the unit tests to make simpler to write & understand
  - adds unit tests for added and modified functionality
  - changes the response when the datafeed cannot be started to
  be a conflict exception

relates elastic/x-pack-elasticsearch#1535

Original commit: elastic/x-pack-elasticsearch@c83196155d
2017-06-01 12:00:46 +01:00
2017-03-19 16:37:21 -04:00
2017-02-10 11:02:42 -08:00
2015-10-30 11:16:29 -06:00
2015-11-25 10:39:08 -05:00
2018-04-20 14:16:58 -07:00

= Elasticsearch X-Pack

A set of Elastic's commercial plugins for Elasticsearch:

- License
- Security
- Watcher
- Monitoring
- Machine Learning
- Graph

= Setup

You must checkout `x-pack-elasticsearch` and `elasticsearch` with a specific directory structure. The
`elasticsearch` checkout will be used when building `x-pack-elasticsearch`. The structure is:

- /path/to/elastic/elasticsearch
- /path/to/elastic/elasticsearch-extra/x-pack-elasticsearch

== Vault Secret

The build requires a Vault Secret ID. You can use a GitHub token by following these steps:

1. Go to https://github.com/settings/tokens
2. Click *Generate new token*
3. Set permissions to `read:org`
4. Copy the token into `~/.elastic/github.token`
5. Set the token's file permissions to `600`

```
$ mkdir ~/.elastic
$ vi ~/.elastic/github.token
# Add your_token exactly as it is into the file and save it
$ chmod 600 ~/.elastic/github.token
```

If you do not create the token, then you will see something along the lines of this as the failure when trying to build X-Pack:

```
* What went wrong:
Missing ~/.elastic/github.token file or VAULT_SECRET_ID environment variable, needed to authenticate with vault for secrets
```

=== Offline Mode

When running the build in offline mode (`--offline`), it will not required to have the vault secret setup.

== Native Code

**This is mandatory as tests depend on it**

Machine Learning requires platform specific binaries, build from https://github.com/elastic/machine-learning-cpp via CI servers.

The native artifacts are stored in S3. To retrieve them infra's team Vault service is utilized, which 
requires a github token. Please setup a github token as documented: 

https://github.com/elastic/infra/blob/master/docs/vault.md#github-auth

The github token has to be put into ~/.elastic/github.token, while the file rights must be set to 0600. 

= Build

- Run unit tests:
+
[source, txt]
-----
gradle clean test
-----

- Run all tests:
+
[source, txt]
-----
gradle clean check
-----

- Run integration tests:
+
[source, txt]
-----
gradle clean integTest
-----

- Package X-Pack (without running tests)
+
[source, txt]
-----
gradle clean assemble
-----

- Install X-Pack (without running tests)
+
[source, txt]
-----
gradle clean install
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Description
🔎 Open source distributed and RESTful search engine.
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