This project is modified, to cater cloud-internal zone testing in mutliple clusters. Introduces an endpoint-watcher element, which checks for Endpoint CRs in the cluster and compared the dns response with the cluster state. Also introduces a dns-rotation element, which updates an IP record every few seconds.
make push
Hostlookuper periodically performs DNS requests, measures latency and exports the data as Prometheus metrics.
It can be used to continuously monitor a list of DNS servers and procotols, so
as to detect anomalies in the network early on. Lookup errors are logged, and
also accounted for in the hostlookuper_dns_errors_total metric.
hostlookuper is configured with the follwoing arguments:
$ hostlookuper -h
Usage of hostlookuper:
-debug
enable verbose logging
-dns-servers string
comma-separated list of DNS servers. if the protocol is omitted, udp is implied, and if the port is omitted, 53 is implied (default "udp://9.9.9.9:53,udp://8.8.8.8:53,udp://one.one.one.one:53")
-hosts string
comma-separated list of hosts against which to perform DNS lookups (default "google.ch,ch.ch")
-interval duration
interval between DNS checks. must be in Go time.ParseDuration format, e.g. 5s or 5m or 1h, etc (default 5s)
-listen string
address on which hostlookuper listens. e.g. 0.0.0.0:9090 (default ":9090")
-timeout duration
maximum timeout for a DNS query. must be in Go time.ParseDuration format, e.g. 5s or 5m or 1h, etc (default 5s)hostlookuper metrics are available under the /metrics URL. An example
/metrics can be found in doc/example_metrics
A Grafana dashboard is available under doc/hostlookuper_grafana.json