latmon is a http/https latency monitor that saves dns, tcp, tls
and http latencies to one or more sites.
Features:
- outputs latencies as a csv file
- generates interactive charts (
go-echarts) - http and https support
- customizable ping interval
- always generates an 24-hour report (csv + charts)
- by default saves intermediate results every 3600 samples
Pre-requisites:
* go toolchain 1.22+
* bash 4.x+
* (optional) make or GNU Make
If you have GNU Make: make will build the binary
If you don't have GNU Make, ./build -s will build the binary
In either case, the binary will be in the directory ./bin/$machine/
where $machine is of the form $OS-$ARCH. eg if you are building
this on an linux-amd64 host - the binary will be in
./bin/linux-amd64.
latmon [options] HOST [HOST..]
Where HOST is of the form:
https:hostname:port
hostname - can be either an IP address or hostname.
Options:
-b, --batch-size int Collect 'B' samples per measurement run (default 3600)
-i, --every I Send pings every I interval apart (default 2s)
-h, --help Show this help message and exit
-L, --log L Send logs to destination L (default "SYSLOG")
--log-level P Log at priority P (default "INFO")
-d, --output-dir D Put charts in directory D (default ".")
-t, --timeout T Set rx deadline to T seconds (default 2s)
--version Show program version and exit
Example invocation:
latmon -i 3s -d /tmp/latmon -L /tmp/latmon/latmon.log \
--log-level DEBUG https:www.google.com
Latmon puts charts for each host in a subdir named after
the host. The csv files are stored in the csv subdir of each host dir
and the charts are stored in the html subdir of each host dir.
Daily stats and charts are stored in files with the format
YYYY-MM-DD.csv and YY-MM-DD.html respectively.
- Add support for quic/http
- Add support for icmp (maybe)
- latmon uses a simple http client in
internal/http - the plotting aspect is in
internal/plot src/http.goperiodically pings a host and sends latency measurements via chan. Each monitored host will have an instance ofhping.