Merging upstream version 1.45.3+dfsg.

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

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+<!--startmeta
+custom_edit_url: "https://github.com/netdata/netdata/edit/master/src/health/notifications/irc/README.md"
+meta_yaml: "https://github.com/netdata/netdata/edit/master/src/health/notifications/irc/metadata.yaml"
+sidebar_label: "IRC"
+learn_status: "Published"
+learn_rel_path: "Alerts & Notifications/Notifications/Agent Dispatched Notifications"
+message: "DO NOT EDIT THIS FILE DIRECTLY, IT IS GENERATED BY THE NOTIFICATION'S metadata.yaml FILE"
+endmeta-->
+
+# IRC
+
+
+<img src="https://netdata.cloud/img/irc.png" width="150"/>
+
+
+Send notifications to IRC using Netdata's Agent alert notification feature, which supports dozens of endpoints, user roles, and more.
+
+
+
+<img src="https://img.shields.io/badge/maintained%20by-Netdata-%2300ab44" />
+
+## Setup
+
+### Prerequisites
+
+#### 
+
+- The `nc` utility. You can set the path to it, or Netdata will search for it in your system `$PATH`.
+- Access to the terminal where Netdata Agent is running
+
+
+
+### Configuration
+
+#### File
+
+The configuration file name for this integration is `health_alarm_notify.conf`.
+
+
+You can edit the configuration file using the `edit-config` script from the
+Netdata [config directory](https://github.com/netdata/netdata/blob/master/docs/netdata-agent/configuration.md#the-netdata-config-directory).
+
+```bash
+cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata
+sudo ./edit-config health_alarm_notify.conf
+```
+#### Options
+
+The following options can be defined for this notification
+
+<details><summary>Config Options</summary>
+
+| Name | Description | Default | Required |
+|:----|:-----------|:-------|:--------:|
+| nc path | Set the path for nc, otherwise Netdata will search for it in your system $PATH |  | yes |
+| SEND_IRC | Set `SEND_IRC` YES. | YES | yes |
+| IRC_NETWORK | Set `IRC_NETWORK` to the IRC network which your preferred channels belong to. |  | yes |
+| IRC_PORT | Set `IRC_PORT` to the IRC port to which a connection will occur. |  | no |
+| IRC_NICKNAME | Set `IRC_NICKNAME` to the IRC nickname which is required to send the notification. It must not be an already registered name as the connection's MODE is defined as a guest. |  | yes |
+| IRC_REALNAME | Set `IRC_REALNAME` to the IRC realname which is required in order to make the connection. |  | yes |
+| DEFAULT_RECIPIENT_IRC | You can have different channels per role, by editing `DEFAULT_RECIPIENT_IRC` with the channel you want |  | yes |
+
+##### nc path
+
+```sh
+#------------------------------------------------------------------------------
+# external commands
+#
+# The full path of the nc command.
+# If empty, the system $PATH will be searched for it.
+# If not found, irc notifications will be silently disabled.
+nc="/usr/bin/nc"
+```
+
+
+##### DEFAULT_RECIPIENT_IRC
+
+The `DEFAULT_RECIPIENT_IRC` can be edited in the following entries at the bottom of the same file:
+```conf
+role_recipients_irc[sysadmin]="#systems"
+role_recipients_irc[domainadmin]="#domains"
+role_recipients_irc[dba]="#databases #systems"
+role_recipients_irc[webmaster]="#marketing #development"
+role_recipients_irc[proxyadmin]="#proxy-admin"
+role_recipients_irc[sitemgr]="#sites"
+```
+
+
+</details>
+
+#### Examples
+
+##### Basic Configuration
+
+
+
+```yaml
+#------------------------------------------------------------------------------
+# irc notification options
+#
+SEND_IRC="YES"
+DEFAULT_RECIPIENT_IRC="#system-alarms"
+IRC_NETWORK="irc.freenode.net"
+IRC_NICKNAME="netdata-alarm-user"
+IRC_REALNAME="netdata-user"
+
+```
+
+
+## Troubleshooting
+
+### Test Notification
+
+You can run the following command by hand, to test alerts configuration:
+
+```bash
+# become user netdata
+sudo su -s /bin/bash netdata
+
+# enable debugging info on the console
+export NETDATA_ALARM_NOTIFY_DEBUG=1
+
+# send test alarms to sysadmin
+/usr/libexec/netdata/plugins.d/alarm-notify.sh test
+
+# send test alarms to any role
+/usr/libexec/netdata/plugins.d/alarm-notify.sh test "ROLE"
+```
+
+Note that this will test _all_ alert mechanisms for the selected role.
+
+