DNSdist monitoring with Netdata
DNSdist
is a highly DNS-, DoS- and abuse-aware loadbalancer.
This module monitors load-balancer performance and health metrics.
It collects metrics from the internal webserver.
Used endpoints:
Requirements
For collecting metrics via HTTP, we need enabled webserver.
Metrics
All metrics have "dnsdist." prefix.
Metric |
Scope |
Dimensions |
Units |
queries |
global |
all, recursive, empty |
queries/s |
queries_dropped |
global |
rule_drop, dynamic_blocked, no_policy, non_queries |
queries/s |
packets_dropped |
global |
acl |
packets/s |
answers |
global |
self_answered, nxdomain, refused, trunc_failures |
answers/s |
backend_responses |
global |
responses |
responses/s |
backend_commerrors |
global |
send_errors |
errors/s |
backend_errors |
global |
timeouts, servfail, non_compliant |
responses/s |
cache |
global |
hits, misses |
answers/s |
servercpu |
global |
system_state, user_state |
ms/s |
servermem |
global |
memory_usage |
MiB |
query_latency |
global |
1ms, 10ms, 50ms, 100ms, 1sec, slow |
queries/s |
query_latency_avg |
global |
100, 1k, 10k, 1000k |
microseconds |
Configuration
Edit the go.d/dnsdist.conf
configuration file using edit-config
from the
Agent's config directory, which is typically at /etc/netdata
.
cd /etc/netdata # Replace this path with your Netdata config directory
sudo ./edit-config go.d/dnsdist.conf
Needs url
and password
or apikey to access the webserver.
Here is a configuration example:
jobs:
- name: local
url: 'http://127.0.0.1:8083'
headers:
X-API-Key: 'your-api-key' # static pre-shared authentication key for access to the REST API (api-key).
- name: remote
url: 'http://203.0.113.0:8083'
headers:
X-API-Key: 'your-api-key' # static pre-shared authentication key for access to the REST API (api-key).
For all available options, see the dnsdist
collector's configuration file.
Troubleshooting
To troubleshoot issues with the dnsdist
collector, run the go.d.plugin
with the debug option enabled. The output
should give you clues as to why the collector isn't working.
-
Navigate to the plugins.d
directory, usually at /usr/libexec/netdata/plugins.d/
. If that's not the case on
your system, open netdata.conf
and look for the plugins
setting under [directories]
.
cd /usr/libexec/netdata/plugins.d/
-
Switch to the netdata
user.
sudo -u netdata -s
-
Run the go.d.plugin
to debug the collector:
./go.d.plugin -d -m dnsdist