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Elasticsearch Guide [7.7] » Alerting on cluster and index events » Actions » Email action
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Email actionedit

Use the email action to send email notifications. To send email, you must configure at least one email account in elasticsearch.yml.

Email notifications can be plain text or styled using HTML. You can include information from the watch execution payload using templates and attach the entire watch payload to the message.

See Email action attributes for the supported attributes. Any attributes that are missing from the email action definition are looked up in the email account configuration. The required attributes must either be set in the email action definition or the account’s email_defaults.

Configuring email actionsedit

You configure email actions in the actions array. Action-specific attributes are specified using the email keyword.

For example, the following email action uses a template to include data from the watch payload in the email body:

"actions" : {
  "send_email" : { 
    "email" : { 
      "to" : "username@example.org", 
      "subject" : "Watcher Notification", 
      "body" : "{{ctx.payload.hits.total}} error logs found" 
    }
  }
}

The id of the action.

The action type is set to email.

One or more addresses to send the email to. Must be specified in the action definition or in the email account configuration.

The subject of the email can contain static text and Mustache templates.

The body of the email can contain static text and Mustache templates. Must be specified in the action definition or in the email account configuration.

Configuring email attachmentsedit

You can attach the execution context payload or data from an any HTTP service to the email notification. There is no limit on the number of attachments you can configure.

To configure attachments, specify a name for the attached file and the type of attachment: data, http or reporting. The data attachment type attaches the execution context payload to the email message. The http attachment type enables you to issue an HTTP request and attach the response to the email message. When configuring the http attachment type, you must specify the request URL. The reporting attachment type is a special type to include PDF rendered dashboards from kibana. This type is consistently polling the kibana app if the dashboard rendering is done, preventing long running HTTP connections, that are potentially killed by firewalls or load balancers in-between.

"actions" : {
  "email_admin" : {
    "email": {
      "to": "John Doe <john.doe@example.com>",
      "attachments" : {
        "my_image.png" : { 
          "http" : { 
            "content_type" : "image/png",
            "request" : {
              "url": "http://example.org/foo/my-image.png" 
            }
          }
        },
        "dashboard.pdf" : {
          "reporting" : {
            "url": "http://example.org:5601/api/reporting/generate/dashboard/Error-Monitoring"
          }
        },
        "data.yml" : {
          "data" : {
            "format" : "yaml" 
          }
        }
      }
    }
  }
}

The ID of the attachment, which is used as the file name in the email attachment.

The type of the attachment and its specific configuration.

The URL from which to retrieve the attachment.

Data attachments default to JSON if you don’t specify the format.

Table 88. http attachment type attributes

Name Description

content_type

Sets the content type for the email attachment. By default, the content type is extracted from the response sent by the HTTP service. You can explicitly specify the content type to ensure that the type is set correctly in the email in case the response does not specify the content type or it’s specified incorrectly. Optional.

inline

Configures as an attachment to sent with disposition inline. This allows the use of embedded images in HTML bodies, which are displayed in certain email clients. Optional. Defaults to false.

request

Contains the HTTP request attributes. At a minimum, you must specify the url attribute to configure the host and path to the service endpoint. See Webhook action attributes for the full list of HTTP request attributes. Required.

Table 89. data attachment type attributes

Name Description

format

Attaches the watch data, equivalent to specifying attach_data in the watch configuration. Possible values are json or yaml. Defaults to json if not specified.

Table 90. reporting attachment type attributes

Name Description

url

The URL to trigger the dashboard creation

inline

Configures as an attachment to sent with disposition inline. This allows the use of embedded images in HTML bodies, which are displayed in certain email clients. Optional. Defaults to false.

retries

The reporting attachment type tries to poll regularly to receive the created PDF. This configures the number of retries. Defaults to 40. The setting xpack.notification.reporting.retries can be configured globally to change the default.

interval

The time to wait between two polling tries. Defaults to 15s (this means, by default watcher tries to download a dashboard for 10 minutes, forty times fifteen seconds). The setting xpack.notification.reporting.interval can be configured globally to change the default.

request.auth

Additional auth configuration for the request

request.proxy

Additional proxy configuration for the request

Attaching reports to an emailedit

You can use the reporting attachment type in an email action to automatically generate a Kibana report and distribute it via email.

See Automating report generation.

Email action attributesedit

Name Required Default Description

account

no

the default account

The email account to use to send the email.

from

no

-

The email address from which the email will be sent. The from field can contain Mustache templates as long as it resolves to a valid email address.

to

yes

-

The email addresses of the to recipients. The to field can contain Mustache templates as long as it resolves to a valid email address.

cc

no

-

The email addresses of the cc recipients. The cc field can contain Mustache templates as long as it resolves to a valid email address.

bcc

no

-

The email addresses of the bcc recipients. The bcc field can contain Mustache templates as long as it resolves to a valid email address.

reply_to

no

-

The email addresses that will be set on the message’s Reply-To header. The reply_to field can contain Mustache templates as long as it resolves to a valid email address.

subject

no

-

The subject of the email. The subject can be static text or contain Mustache templates.

body

no

-

The body of the email. When this field holds a string, it will default to the text body of the email. Set as an object to specify either the text or the html body or both (using the fields below)

body.text

no

-

The plain text body of the email. The body can be static text or contain Mustache templates.

body.html

no

-

The html body of the email. The body can be static text or contain Mustache templates. This body will be sanitized to remove dangerous content such as scripts. This behavior can be disabled by setting xpack.notification.email.html.sanitization.enabled: false in elasticsearch.yaml.

priority

no

-

The priority of this email. Valid values are: lowest, low, normal, high and highest. The priority can contain a Mustache template as long as it resolves to one of the valid values.

attachments

no

-

Attaches the watch payload (data attachment) or a file retrieved from an HTTP service (http attachment) to the email. For more information, see Configuring Email Attachments.

attach_data

no

false

Indicates whether the watch execution data should be attached to the email. You can specify a Boolean value or an object. If attach_data is set to true, the data is attached as a YAML file. This attribute is deprecated, use the attachments attribute to add a data attachment to attach the watch payload.

attach_data.format

no

yaml

When attach_data is specified as an object, this field controls the format of the attached data. The supported formats are json and yaml. This attribute is deprecated, use the attachments attribute to add a data attachment to attach the watch payload.
Email Address
An email address can contain two possible parts—​the address itself and an optional personal name as described in RFC 822. The address can be represented either as a string of the form user@host.domain or Personal Name <user@host.domain>. You can also specify an email address as an object that contains name and address fields.
Address List
A list of addresses can be specified as a an array: [ 'Personal Name <user1@host.domain>', 'user2@host.domain' ].

Configuring email accountsedit

Watcher can send email using any SMTP email service. Email messages can contain basic HTML tags. You can control which groups of tags are allowed by Configuring HTML Sanitization Options.

You configure the accounts Watcher can use to send email in the xpack.notification.email namespace in elasticsearch.yml. The password for the specified SMTP user is stored securely in the Elasticsearch keystore.

If your email account is configured to require two step verification, you need to generate and use a unique App Password to send email from Watcher. Authentication will fail if you use your primary password.

Watcher provides three email profiles that control how MIME messages are structured: standard (default), gmail, and outlook. These profiles accommodate differences in how various email systems interpret the MIME standard. If you are using Gmail or Outlook, we recommend using the corresponding profile. Use the standard profile if you are using another email system.

For more information about configuring Watcher to work with different email systems, see:

If you configure multiple email accounts, you must either configure a default account or specify which account the email should be sent with in the email action.

xpack.notification.email:
  default_account: team1
  account:
    team1:
      ...
    team2:
      ...
Sending email from Gmailedit

Use the following email account settings to send email from the Gmail SMTP service:

xpack.notification.email.account:
    gmail_account:
        profile: gmail
        smtp:
            auth: true
            starttls.enable: true
            host: smtp.gmail.com
            port: 587
            user: <username>

To store the account SMTP password, use the keystore command (see secure settings)

bin/elasticsearch-keystore add xpack.notification.email.account.gmail_account.smtp.secure_password

If you get an authentication error that indicates that you need to continue the sign-in process from a web browser when Watcher attempts to send email, you need to configure Gmail to Allow Less Secure Apps to access your account.

If two-step verification is enabled for your account, you must generate and use a unique App Password to send email from Watcher. See Sign in using App Passwords for more information.

Sending email from Outlook.comedit

Use the following email account settings to send email action from the Outlook.com SMTP service:

xpack.notification.email.account:
    outlook_account:
        profile: outlook
        smtp:
            auth: true
            starttls.enable: true
            host: smtp-mail.outlook.com
            port: 587
            user: <email.address>

To store the account SMTP password, use the keystore command (see secure settings)

bin/elasticsearch-keystore add xpack.notification.email.account.outlook_account.smtp.secure_password

When sending emails, you have to provide a from address, either a default one in your account configuration or as part of the email action in the watch.

You need to use a unique App Password if two-step verification is enabled. See App passwords and two-step verification for more information.

Sending email from Amazon SES (Simple Email Service)edit

Use the following email account settings to send email from the Amazon Simple Email Service (SES) SMTP service:

xpack.notification.email.account:
    ses_account:
        smtp:
            auth: true
            starttls.enable: true
            starttls.required: true
            host: email-smtp.us-east-1.amazonaws.com 
            port: 587
            user: <username>

smtp.host varies depending on the region

To store the account SMTP password, use the keystore command (see secure settings)

bin/elasticsearch-keystore add xpack.notification.email.account.ses_account.smtp.secure_password

You need to use your Amazon SES SMTP credentials to send email through Amazon SES. For more information, see Obtaining Your Amazon SES SMTP Credentials. You might also need to verify your email address or your whole domain at AWS.

Sending email from Microsoft Exchangeedit

Use the following email account settings to send email action from Microsoft Exchange:

xpack.notification.email.account:
    exchange_account:
        profile: outlook
        email_defaults:
            from: <email address of service account> 
        smtp:
            auth: true
            starttls.enable: true
            host: <your exchange server>
            port: 587
            user: <email address of service account>

Some organizations configure Exchange to validate that the from field is a valid local email account.

Many organizations support use of your email address as your username, though it is a good idea to check with your system administrator if you receive authentication-related failures.

To store the account SMTP password, use the keystore command (see secure settings)

bin/elasticsearch-keystore add xpack.notification.email.account.exchange_account.smtp.secure_password
Configuring HTML sanitization optionsedit

The email action supports sending messages with an HTML body. However, for security reasons, Watcher sanitizes the HTML.

You can control which HTML features are allowed or disallowed by configuring the xpack.notification.email.html.sanitization.allow and xpack.notification.email.html.sanitization.disallow settings in elasticsearch.yml. You can specify individual HTML elements and HTML feature groups. By default, Watcher allows the following features: body, head, _tables, _links, _blocks, _formatting and img:embedded.

For example, the following settings allow the HTML to contain tables and block elements, but disallow <h4>, <h5> and <h6> tags.

xpack.notification.email.html.sanitization:
    allow: _tables, _blocks
    disallow: h4, h5, h6

To disable sanitization entirely, add the following setting to elasticsearch.yml:

xpack.notification.email.html.sanitization.enabled: false
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