Getting Started

This getting started guide walks you through installing Watcher and creating your first watches, and introduces the building blocks you’ll use to create custom watches. You can install Watcher on nodes running Elasticsearch 2.2.1.

To install and run Watcher:

Run bin/plugin install from ES_HOME to install the License plugin:
```
bin/plugin install license
```
You need to install the License and Watcher plugins on each node in your cluster.
Run bin/plugin install to install the Watcher plugin.
```
bin/plugin install watcher
```
If you are using a DEB/RPM distribution of Elasticsearch, run the installation with superuser permissions. To perform an offline installation, download the Watcher binaries.

Confirm that you want to grant Watcher additional permissions. Watcher needs these permissions to set the threat context loader during install so it can send email notifications.

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@     WARNING: plugin requires additional permissions     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
* java.lang.RuntimePermission getClassLoader
* java.lang.RuntimePermission setContextClassLoader
* java.lang.RuntimePermission setFactory
See http://docs.oracle.com/javase/8/docs/technotes/guides/security/permissions.html
for descriptions of what these permissions allow and the associated risks.

Continue with installation? [y/N]y

Specify the --batch option when running the install command to automatically grant these permissions and bypass this install prompt.

Start Elasticsearch.
```
bin/elasticsearch
```

To verify that Watcher is set up, call the Watcher _stats API:

curl -XGET 'http://localhost:9200/_watcher/stats?pretty'

You haven’t set up any watches yet, so the watch_count is zero and the execution_thread_pool queue is empty:

{
  "watcher_state": "started",
  "watch_count": 0,
  "execution_thread_pool": {
    "queue_size": 0,
    "max_size": 0
  }
}

Ready to start building watches? Choose one of the following scenarios:

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