Update unbound README
This commit is contained in:
Daniel Nelson
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# Unbound Input Plugin
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This plugin gathers stats from [Unbound - a validating, recursive, and caching DNS resolver](https://www.unbound.net/)
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This plugin gathers stats from [Unbound](https://www.unbound.net/) -
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a validating, recursive, and caching DNS resolver.
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### Configuration:
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```toml
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# A plugin to collect stats from Unbound - a validating, recursive, and caching DNS resolver
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[[inputs.unbound]]
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## If running as a restricted user you can prepend sudo for additional access:
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#use_sudo = false
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# A plugin to collect stats from the Unbound DNS resolver
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[[inputs.unbound]]
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## Address of server to connect to, read from unbound conf default, optionally ':port'
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## Will lookup IP if given a hostname
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server = "127.0.0.1:8953"
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## The default location of the unbound-control binary can be overridden with:
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binary = "/usr/sbin/unbound-control"
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## If running as a restricted user you can prepend sudo for additional access:
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# use_sudo = false
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## The default timeout of 1s can be overriden with:
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#timeout = "1s"
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## The default location of the unbound-control binary can be overridden with:
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# binary = "/usr/sbin/unbound-control"
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## Use the builtin fielddrop/fieldpass telegraf filters in order to keep only specific fields
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fieldpass = ["total_*", "num_*","time_up", "mem_*"]
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## The default timeout of 1s can be overriden with:
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# timeout = "1s"
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## IP of server to connect to, read from unbound conf default, optionally ':port'
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## Will lookup IP if given a hostname
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server = "127.0.0.1:8953"
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## Output thread related values in a separate measurement "unbound_threads", with additional tag
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## "thread" identifying the thread number (0 ... the number of configured threads)
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## By default, thread related metrics are output as additional fields in measurement "unbound"
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thread_as_tag = false
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## When set to true, thread metrics are tagged with the thread id.
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##
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## The default is false for backwards compatibility, and will be change to
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## true in a future version. It is recommended to set to true on new
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## deployments.
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thread_as_tag = false
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```
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### Measurements & Fields:
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#### Permissions:
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This is the full list of stats provided by unbound-control and potentially collected by telegram
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depending of your unbound configuration. Histogram related statistics will never be collected,
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It's important to note that this plugin references unbound-control, which may require additional permissions to execute successfully.
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Depending on the user/group permissions of the telegraf user executing this plugin, you may need to alter the group membership, set facls, or use sudo.
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**Group membership (Recommended)**:
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```bash
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$ groups telegraf
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telegraf : telegraf
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$ usermod -a -G unbound telegraf
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$ groups telegraf
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telegraf : telegraf unbound
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```
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**Sudo privileges**:
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If you use this method, you will need the following in your telegraf config:
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```toml
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[[inputs.unbound]]
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use_sudo = true
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```
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You will also need to update your sudoers file:
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```bash
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$ visudo
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# Add the following line:
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telegraf ALL=(ALL) NOPASSWD: /usr/sbin/unbound-control
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```
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Please use the solution you see as most appropriate.
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### Metrics:
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This is the full list of stats provided by unbound-control and potentially collected
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depending of your unbound configuration. Histogram related statistics will never be collected,
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extended statistics can also be imported ("extended-statistics: yes" in unbound configuration).
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In the output, the dots in the unbound-control stat name are replaced by underscores(see
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https://www.unbound.net/documentation/unbound-control.html for details).
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Shown metrics are with `thread_as_tag` enabled.
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- unbound
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thread0_num_queries
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thread0_num_cachehits
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thread0_num_cachemiss
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thread0_num_prefetch
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thread0_num_recursivereplies
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thread0_requestlist_avg
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thread0_requestlist_max
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thread0_requestlist_overwritten
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thread0_requestlist_exceeded
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thread0_requestlist_current_all
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thread0_requestlist_current_user
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thread0_recursion_time_avg
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thread0_recursion_time_median
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- fields:
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total_num_queries
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total_num_cachehits
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total_num_cachemiss
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@ -102,54 +124,27 @@ https://www.unbound.net/documentation/unbound-control.html for details).
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unwanted_queries
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unwanted_replies
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### Permissions:
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- unbound_thread
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- tags:
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- thread
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- fields:
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- num_queries
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- num_cachehits
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- num_cachemiss
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- num_prefetch
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- num_recursivereplies
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- requestlist_avg
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- requestlist_max
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- requestlist_overwritten
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- requestlist_exceeded
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- requestlist_current_all
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- requestlist_current_user
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- recursion_time_avg
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- recursion_time_median
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It's important to note that this plugin references unbound-control, which may require additional permissions to execute successfully.
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Depending on the user/group permissions of the telegraf user executing this plugin, you may need to alter the group membership, set facls, or use sudo.
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**Group membership (Recommended)**:
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```bash
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$ groups telegraf
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telegraf : telegraf
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$ usermod -a -G unbound telegraf
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$ groups telegraf
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telegraf : telegraf unbound
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### Example Output:
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```
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**Sudo privileges**:
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If you use this method, you will need the following in your telegraf config:
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```toml
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[[inputs.unbound]]
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use_sudo = true
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unbound,host=localhost total_requestlist_avg=0,total_requestlist_exceeded=0,total_requestlist_overwritten=0,total_requestlist_current_user=0,total_recursion_time_avg=0.029186,total_tcpusage=0,total_num_queries=51,total_num_queries_ip_ratelimited=0,total_num_recursivereplies=6,total_requestlist_max=0,time_now=1522804978.784814,time_elapsed=310.435217,total_num_cachemiss=6,total_num_zero_ttl=0,time_up=310.435217,total_num_cachehits=45,total_num_prefetch=0,total_requestlist_current_all=0,total_recursion_time_median=0.016384 1522804979000000000
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unbound_threads,host=localhost,thread=0 num_queries_ip_ratelimited=0,requestlist_current_user=0,recursion_time_avg=0.029186,num_prefetch=0,requestlist_overwritten=0,requestlist_exceeded=0,requestlist_current_all=0,tcpusage=0,num_cachehits=37,num_cachemiss=6,num_recursivereplies=6,requestlist_avg=0,num_queries=43,num_zero_ttl=0,requestlist_max=0,recursion_time_median=0.032768 1522804979000000000
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unbound_threads,host=localhost,thread=1 num_zero_ttl=0,recursion_time_avg=0,num_queries_ip_ratelimited=0,num_cachehits=8,num_prefetch=0,requestlist_exceeded=0,recursion_time_median=0,tcpusage=0,num_cachemiss=0,num_recursivereplies=0,requestlist_max=0,requestlist_overwritten=0,requestlist_current_user=0,num_queries=8,requestlist_avg=0,requestlist_current_all=0 1522804979000000000
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```
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You will also need to update your sudoers file:
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```bash
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$ visudo
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# Add the following line:
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telegraf ALL=(ALL) NOPASSWD: /usr/sbin/unbound-control
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```
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Please use the solution you see as most appropriate.
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### Example Output (default):
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```
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telegraf --config etc/telegraf.conf --input-filter unbound --test
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* Plugin: inputs.unbound, Collection 1
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> unbound,host=localhost total_num_cachehits=0,total_num_prefetch=0,total_requestlist_avg=0,total_requestlist_max=0,total_recursion_time_median=0,total_num_queries=0,total_requestlist_overwritten=0,total_requestlist_current_all=0,time_up=159185.583967,total_num_recursivereplies=0,total_requestlist_exceeded=0,total_requestlist_current_user=0,total_recursion_time_avg=0,total_tcpusage=0,total_num_cachemiss=0 1510130793000000000
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```
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### Example Output (with thread_as_tag = true, unbound configured with num_threads: 2)
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```
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telegraf --config etc/telegraf.conf --input-filter unbound --test
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* Plugin: inputs.unbound, Collection 1
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> unbound,host=localhost total_requestlist_avg=0,total_requestlist_exceeded=0,total_requestlist_overwritten=0,total_requestlist_current_user=0,total_recursion_time_avg=0.029186,total_tcpusage=0,total_num_queries=51,total_num_queries_ip_ratelimited=0,total_num_recursivereplies=6,total_requestlist_max=0,time_now=1522804978.784814,time_elapsed=310.435217,total_num_cachemiss=6,total_num_zero_ttl=0,time_up=310.435217,total_num_cachehits=45,total_num_prefetch=0,total_requestlist_current_all=0,total_recursion_time_median=0.016384 1522804979000000000
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> unbound_threads,host=localhost,thread=0 num_queries_ip_ratelimited=0,requestlist_current_user=0,recursion_time_avg=0.029186,num_prefetch=0,requestlist_overwritten=0,requestlist_exceeded=0,requestlist_current_all=0,tcpusage=0,num_cachehits=37,num_cachemiss=6,num_recursivereplies=6,requestlist_avg=0,num_queries=43,num_zero_ttl=0,requestlist_max=0,recursion_time_median=0.032768 1522804979000000000
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> unbound_threads,host=localhost,thread=1 num_zero_ttl=0,recursion_time_avg=0,num_queries_ip_ratelimited=0,num_cachehits=8,num_prefetch=0,requestlist_exceeded=0,recursion_time_median=0,tcpusage=0,num_cachemiss=0,num_recursivereplies=0,requestlist_max=0,requestlist_overwritten=0,requestlist_current_user=0,num_queries=8,requestlist_avg=0,requestlist_current_all=0 1522804979000000000
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```
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@ -35,31 +35,30 @@ var defaultBinary = "/usr/sbin/unbound-control"
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var defaultTimeout = internal.Duration{Duration: time.Second}
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var sampleConfig = `
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## If running as a restricted user you can prepend sudo for additional access:
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#use_sudo = false
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## The default location of the unbound-control binary can be overridden with:
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binary = "/usr/sbin/unbound-control"
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## The default timeout of 1s can be overriden with:
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timeout = "1s"
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## Use the builtin fielddrop/fieldpass telegraf filters in order to keep/remove specific fields
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fieldpass = ["total_*", "num_*","time_up", "mem_*"]
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## IP of server to connect to, read from unbound conf default, optionally ':port'
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## Address of server to connect to, read from unbound conf default, optionally ':port'
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## Will lookup IP if given a hostname
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server = "127.0.0.1:8953"
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## Output thread related values in a separate measurement "unbound_threads", with additional tag
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## "thread" identifying the thread number (0 ... the number of configured threads)
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## By default, thread related metrics are output as additional fields in a single metric point
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## If running as a restricted user you can prepend sudo for additional access:
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# use_sudo = false
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## The default location of the unbound-control binary can be overridden with:
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# binary = "/usr/sbin/unbound-control"
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## The default timeout of 1s can be overriden with:
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# timeout = "1s"
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## When set to true, thread metrics are tagged with the thread id.
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##
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## The default is false for backwards compatibility, and will be change to
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## true in a future version. It is recommended to set to true on new
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## deployments.
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thread_as_tag = false
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`
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// Description displays what this plugin is about
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func (s *Unbound) Description() string {
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return "A plugin to collect stats from Unbound - a validating, recursive, and caching DNS resolver"
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return "A plugin to collect stats from the Unbound DNS resolver"
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}
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// SampleConfig displays configuration instructions
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