Merging upstream version 1.39.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 133 insertions, 75 deletions

diff --git a/health/notifications/custom/README.md b/health/notifications/custom/README.md
index df8f88e40..ad64cea27 100644
--- a/health/notifications/custom/README.md
+++ b/health/notifications/custom/README.md
@@ -1,29 +1,128 @@
-<!--
-title: "Custom"
-sidebar_label: "Custom endpoint"
-custom_edit_url: "https://github.com/netdata/netdata/edit/master/health/notifications/custom/README.md"
-learn_status: "Published"
-learn_topic_type: "Tasks"
-learn_rel_path: "Setup/Notification/Agent"
-learn_autogeneration_metadata: "{'part_of_cloud': False, 'part_of_agent': True}"
--->
-
-# Custom
-
-Netdata allows you to send custom notifications to any endpoint you choose.
-
-To configure custom notifications, you will need to customize `health_alarm_notify.conf`. Open the file for editing
-using [`edit-config`](https://github.com/netdata/netdata/blob/master/docs/configure/nodes.md#use-edit-config-to-edit-configuration-files) from the [Netdata config
-directory](https://github.com/netdata/netdata/blob/master/docs/configure/nodes.md#the-netdata-config-directory), which is typically at `/etc/netdata`.
+# Custom Agent alert notifications
+
+Netdata Agent's alert notification feature allows you to send custom notifications to any endpoint you choose.
+
+> ### Note
+>
+> This file assumes you have read the [Introduction to Agent alert notifications](https://github.com/netdata/netdata/blob/master/health/notifications/README.md), detailing how the Netdata Agent's alert notification method works.
+
+## Prerequisites
+
+You need to have terminal access to the Agent you wish to configure.
+
+## Configure Netdata to send alert notifications to a custom endpoint
+
+> ### Info
+>
+> This file mentions editing configuration files.  
+>
+> - To edit configuration files in a safe way, we provide the [`edit config` script](https://github.com/netdata/netdata/blob/master/docs/configure/nodes.md#use-edit-config-to-edit-configuration-files) located in your [Netdata config directory](https://github.com/netdata/netdata/blob/master/docs/configure/nodes.md#the-netdata-config-directory) (typically is `/etc/netdata`) that creates the proper file and opens it in an editor automatically.  
+> Note that to run the script you need to be inside your Netdata config directory.
+>
+> It is recommended to use this way for configuring Netdata.
+
+Edit `health_alarm_notify.conf`, changes to this file do not require restarting Netdata:
+
+1. Set `SEND_CUSTOM` to `YES`.
+2. The `DEFAULT_RECIPIENT_CUSTOM`'s value is dependent on how you handle the `${to}` variable inside the `custom_sender()` function.  
+   All roles will default to this variable if left unconfigured.
+3. Edit the `custom_sender()` function.  
+   You can look at the other senders in `/usr/libexec/netdata/plugins.d/alarm-notify.sh` for examples of how to modify the function in this configuration file.
+
+    The following is a sample `custom_sender()` function in `health_alarm_notify.conf`, to send an SMS via an imaginary HTTPS endpoint to the SMS gateway:
+
+    ```sh
+    custom_sender() {
+        # example human readable SMS
+        local msg="${host} ${status_message}: ${alarm} ${raised_for}"
+
+        # limit it to 160 characters and encode it for use in a URL
+        urlencode "${msg:0:160}" >/dev/null; msg="${REPLY}"
+
+        # a space separated list of the recipients to send alarms to
+        to="${1}"
+
+        for phone in ${to}; do
+          httpcode=$(docurl -X POST \
+                --data-urlencode "From=XXX" \
+                --data-urlencode "To=${phone}" \
+                --data-urlencode "Body=${msg}" \
+                -u "${accountsid}:${accounttoken}" \
+            https://domain.website.com/)
+
+          if [ "${httpcode}" = "200" ]; then
+            info "sent custom notification ${msg} to ${phone}"
+            sent=$((sent + 1))
+          else
+            error "failed to send custom notification ${msg} to ${phone} with HTTP error code ${httpcode}."
+          fi
+        done
+    }
+    ```
+
+    The supported variables that you can use for the function's `msg` variable are:
+
+    | Variable name               | Description                                                                      |
+    |:---------------------------:|:---------------------------------------------------------------------------------|
+    | `${alarm}`                  | Like "name = value units"                                                        |
+    | `${status_message}`         | Like "needs attention", "recovered", "is critical"                               |
+    | `${severity}`               | Like "Escalated to CRITICAL", "Recovered from WARNING"                           |
+    | `${raised_for}`             | Like "(alarm was raised for 10 minutes)"                                         |
+    | `${host}`                   | The host generated this event                                                    |
+    | `${url_host}`               | Same as ${host} but URL encoded                                                  |
+    | `${unique_id}`              | The unique id of this event                                                      |
+    | `${alarm_id}`               | The unique id of the alarm that generated this event                             |
+    | `${event_id}`               | The incremental id of the event, for this alarm id                               |
+    | `${when}`                   | The timestamp this event occurred                                                |
+    | `${name}`                   | The name of the alarm, as given in netdata health.d entries                      |
+    | `${url_name}`               | Same as ${name} but URL encoded                                                  |
+    | `${chart}`                  | The name of the chart (type.id)                                                  |
+    | `${url_chart}`              | Same as ${chart} but URL encoded                                                 |
+    | `${family}`                 | The family of the chart                                                          |
+    | `${url_family}`             | Same as ${family} but URL encoded                                                |
+    | `${status}`                 | The current status : REMOVED, UNINITIALIZED, UNDEFINED, CLEAR, WARNING, CRITICAL |
+    | `${old_status}`             | The previous status: REMOVED, UNINITIALIZED, UNDEFINED, CLEAR, WARNING, CRITICAL |
+    | `${value}`                  | The current value of the alarm                                                   |
+    | `${old_value}`              | The previous value of the alarm                                                  |
+    | `${src}`                    | The line number and file the alarm has been configured                           |
+    | `${duration}`               | The duration in seconds of the previous alarm state                              |
+    | `${duration_txt}`           | Same as ${duration} for humans                                                   |
+    | `${non_clear_duration}`     | The total duration in seconds this is/was non-clear                              |
+    | `${non_clear_duration_txt}` | Same as ${non_clear_duration} for humans                                         |
+    | `${units}`                  | The units of the value                                                           |
+    | `${info}`                   | A short description of the alarm                                                 |
+    | `${value_string}`           | Friendly value (with units)                                                      |
+    | `${old_value_string}`       | Friendly old value (with units)                                                  |
+    | `${image}`                  | The URL of an image to represent the status of the alarm                         |
+    | `${color}`                  | A color in  AABBCC format for the alarm                                          |
+    | `${goto_url}`               | The URL the user can click to see the netdata dashboard                          |
+    | `${calc_expression}`        | The expression evaluated to provide the value for the alarm                      |
+    | `${calc_param_values}`      | The value of the variables in the evaluated expression                           |
+    | `${total_warnings}`         | The total number of alarms in WARNING state on the host                          |
+    | `${total_critical}`         | The total number of alarms in CRITICAL state on the host                         |
+
+You can then have different `${to}` variables per **role**, by editing `DEFAULT_RECIPIENT_CUSTOM` with the variable you want, in the following entries at the bottom of the same file:
+
+```conf
+role_recipients_custom[sysadmin]="systems"
+role_recipients_custom[domainadmin]="domains"
+role_recipients_custom[dba]="databases systems"
+role_recipients_custom[webmaster]="marketing development"
+role_recipients_custom[proxyadmin]="proxy-admin"
+role_recipients_custom[sitemgr]="sites"
+```
 
-You can look at the other senders in `/usr/libexec/netdata/plugins.d/alarm-notify.sh` for examples of how to modify the `custom_sender()` function in `health_alarm_notify.conf`.
+An example working configuration would be:
 
-As with other notifications, you will also need to define the recipient list in `DEFAULT_RECIPIENT_CUSTOM` and/or the `role_recipients_custom` array.
+```conf
+#------------------------------------------------------------------------------
+# custom notifications
 
-The following is a sample `custom_sender` function in `health_alarm_notify.conf`, to send an SMS via an imaginary HTTPS endpoint to the SMS gateway:
+SEND_CUSTOM="YES"
+DEFAULT_RECIPIENT_CUSTOM=""
 
-```
- custom_sender() {
+# The custom_sender() is a custom function to do whatever you need to do
+custom_sender() {
     # example human readable SMS
     local msg="${host} ${status_message}: ${alarm} ${raised_for}"
 
@@ -35,63 +134,22 @@ The following is a sample `custom_sender` function in `health_alarm_notify.conf`
 
     for phone in ${to}; do
       httpcode=$(docurl -X POST \
-				    --data-urlencode "From=XXX" \
-				    --data-urlencode "To=${phone}" \
-				    --data-urlencode "Body=${msg}" \
-				    -u "${accountsid}:${accounttoken}" \
+            --data-urlencode "From=XXX" \
+            --data-urlencode "To=${phone}" \
+            --data-urlencode "Body=${msg}" \
+            -u "${accountsid}:${accounttoken}" \
         https://domain.website.com/)
 
-       if [ "${httpcode}" = "200" ]; then
-         info "sent custom notification ${msg} to ${phone}"
-         sent=$((sent + 1))
-       else
-         error "failed to send custom notification ${msg} to ${phone} with HTTP error code ${httpcode}."
-       fi
+      if [ "${httpcode}" = "200" ]; then
+        info "sent custom notification ${msg} to ${phone}"
+        sent=$((sent + 1))
+      else
+        error "failed to send custom notification ${msg} to ${phone} with HTTP error code ${httpcode}."
+      fi
     done
 }
 ```
 
-Variables available to the custom_sender:
-
--   `${to_custom}`          the list of recipients for the alarm
--   `${host}`               the host generated this event
--   `${url_host}`           same as `${host}` but URL encoded
--   `${unique_id}`          the unique id of this event
--   `${alarm_id}`           the unique id of the alarm that generated this event
--   `${event_id}`           the incremental id of the event, for this alarm id
--   `${when}`               the timestamp this event occurred
--   `${name}`               the name of the alarm, as given in Netdata health.d entries
--   `${url_name}`           same as `${name}` but URL encoded
--   `${chart}`              the name of the chart (type.id)
--   `${url_chart}`          same as `${chart}` but URL encoded
--   `${family}`             the family of the chart
--   `${url_family}`         same as `${family}` but URL encoded
--   `${status}`             the current status : REMOVED, UNINITIALIZED, UNDEFINED, CLEAR, WARNING, CRITICAL
--   `${old_status}`         the previous status: REMOVED, UNINITIALIZED, UNDEFINED, CLEAR, WARNING, CRITICAL
--   `${value}`              the current value of the alarm
--   `${old_value}`          the previous value of the alarm
--   `${src}`                the line number and file the alarm has been configured
--   `${duration}`           the duration in seconds of the previous alarm state
--   `${duration_txt}`       same as `${duration}` for humans
--   `${non_clear_duration}` the total duration in seconds this is/was non-clear
--   `${non_clear_duration_txt}` same as `${non_clear_duration}` for humans
--   `${units}`              the units of the value
--   `${info}`               a short description of the alarm
--   `${value_string}`       friendly value (with units)
--   `${old_value_string}`   friendly old value (with units)
--   `${image}`              the URL of an image to represent the status of the alarm
--   `${color}`              a color in #AABBCC format for the alarm
--   `${goto_url}`           the URL the user can click to see the Netdata dashboard
--   `${calc_expression}`    the expression evaluated to provide the value for the alarm
--   `${calc_param_values}`  the value of the variables in the evaluated expression
--   `${total_warnings}`     the total number of alarms in WARNING state on the host
--   `${total_critical}`     the total number of alarms in CRITICAL state on the host
-
-The following are more human friendly:
-
--   `${alarm}`              like "name = value units"
--   `${status_message}`     like "needs attention", "recovered", "is critical"
--   `${severity}`           like "Escalated to CRITICAL", "Recovered from WARNING"
--   `${raised_for}`         like "(alarm was raised for 10 minutes)"
-
+## Test the notification method
 
+To test this alert notification method refer to the ["Testing Alert Notifications"](https://github.com/netdata/netdata/blob/master/health/notifications/README.md#testing-alert-notifications) section of the Agent alert notifications page.