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diff --git a/docs/guides/collect-unbound-metrics.md b/docs/guides/collect-unbound-metrics.md new file mode 100644 index 000000000..299464745 --- /dev/null +++ b/docs/guides/collect-unbound-metrics.md @@ -0,0 +1,138 @@ +<!-- +title: "Monitor Unbound DNS servers with Netdata" +date: 2020-03-31 +custom_edit_url: https://github.com/netdata/netdata/edit/master/docs/guides/collect-unbound-metrics.md +--> + +# Monitor Unbound DNS servers with Netdata + +[Unbound](https://nlnetlabs.nl/projects/unbound/about/) is a "validating, recursive, caching DNS resolver" from NLNet +Labs. In v1.19 of Netdata, we release a completely refactored collector for collecting real-time metrics from Unbound +servers and displaying them in Netdata dashboards. + +Unbound runs on FreeBSD, OpenBSD, NetBSD, macOS, Linux, and Windows, and supports DNS-over-TLS, which ensures that DNS +queries and answers are all encrypted with TLS. In theory, that should reduce the risk of eavesdropping or +man-in-the-middle attacks when communicating to DNS servers. + +This guide will show you how to collect dozens of essential metrics from your Unbound servers with minimal +configuration. + +## Set up your Unbound installation + +As with all data sources, Netdata can auto-detect Unbound servers if you installed them using the standard installation +procedure. + +Regardless of whether you're connecting to a local or remote Unbound server, you need to be able to access the server's +`remote-control` interface via an IP address, FQDN, or Unix socket. + +To set up the `remote-control` interface, you can use `unbound-control`. First, run `unbound-control-setup` to generate +the TLS key files that will encrypt connections to the remote interface. Then add the following to the end of your +`unbound.conf` configuration file. See the [Unbound +documentation](https://nlnetlabs.nl/documentation/unbound/howto-setup/#setup-remote-control) for more details on using +`unbound-control`, such as how to handle situations when Unbound is run under a unique user. + +```conf +# enable remote-control +remote-control: + control-enable: yes +``` + +Next, make your `unbound.conf`, `unbound_control.key`, and `unbound_control.pem` files readable by Netdata using [access +control lists](https://wiki.archlinux.org/index.php/Access_Control_Lists) (ACL). + +```bash +sudo setfacl -m user:netdata:r unbound.conf +sudo setfacl -m user:netdata:r unbound_control.key +sudo setfacl -m user:netdata:r unbound_control.pem +``` + +Finally, take note whether you're using Unbound in _cumulative_ or _non-cumulative_ mode. This will become relevant when +configuring the collector. + +## Configure the Unbound collector + +You may not need to do any more configuration to have Netdata collect your Unbound metrics. + +If you followed the steps above to enable `remote-control` and make your Unbound files readable by Netdata, that should +be enough. Restart Netdata with `service netdata restart`, or the appropriate method for your system. You should see +Unbound metrics in your Netdata dashboard! + + + +If that failed, you will need to manually configure `unbound.conf`. See the next section for details. + +### Manual setup for a local Unbound server + +To configure Netdata's Unbound collector module, navigate to your Netdata configuration directory (typically at +`/etc/netdata/`) and use `edit-config` to initialize and edit your Unbound configuration file. + +```bash +cd /etc/netdata/ # Replace with your Netdata configuration directory, if not /etc/netdata/ +sudo ./edit-config go.d/unbound.conf +``` + +The file contains all the global and job-related parameters. The `name` setting is required, and two Unbound servers +can't have the same name. + +> It is important you know whether your Unbound server is running in cumulative or non-cumulative mode, as a conflict +> between modes will create incorrect charts. + +Here are two examples for local Unbound servers, which may work based on your unique setup: + +```yaml +jobs: + - name: local + address: 127.0.0.1:8953 + cumulative: no + use_tls: yes + tls_skip_verify: yes + tls_cert: /path/to/unbound_control.pem + tls_key: /path/to/unbound_control.key + + - name: local + address: 127.0.0.1:8953 + cumulative: yes + use_tls: no +``` + +Netdata will attempt to read `unbound.conf` to get the appropriate `address`, `cumulative`, `use_tls`, `tls_cert`, and +`tls_key` parameters. + +Restart Netdata with `service netdata restart`, or the appropriate method for your system. + +### Manual setup for a remote Unbound server + +Collecting metrics from remote Unbound servers requires manual configuration. There are too many possibilities to cover +all remote connections here, but the [default `unbound.conf` +file](https://github.com/netdata/go.d.plugin/blob/master/config/go.d/unbound.conf) contains a few useful examples: + +```yaml +jobs: + - name: remote + address: 203.0.113.10:8953 + use_tls: no + + - name: remote_cumulative + address: 203.0.113.11:8953 + use_tls: no + cumulative: yes + + - name: remote + address: 203.0.113.10:8953 + cumulative: yes + use_tls: yes + tls_cert: /etc/unbound/unbound_control.pem + tls_key: /etc/unbound/unbound_control.key +``` + +To see all the available options, see the default [unbound.conf +file](https://github.com/netdata/go.d.plugin/blob/master/config/go.d/unbound.conf). + +## What's next? + +Now that you're collecting metrics from your Unbound servers, let us know how it's working for you! There's always room +for improvement or refinement based on real-world use cases. Feel free to [file an +issue](https://github.com/netdata/netdata/issues/new?labels=bug%2C+needs+triage&template=bug_report.md) with your +thoughts. + +[](<>) |