mtr-exporter

mtr-exporter periodically executes mtr to a given host and provides the measured results as prometheus metrics.

Usually, mtr is producing the following output:

 HOST: src.example.com       Loss%   Snt   Last   Avg  Best  Wrst StDev
 1.|-- 127.0.0.1             0.0%     2    0.6   0.6   0.6   0.7   0.1
 2.|-- 127.0.0.2             0.0%     2    6.1  10.2   6.1  14.3   5.8
 3.|-- 127.0.0.3             0.0%     2   13.0  12.3  11.6  13.0   1.0
 4.|-- 127.0.0.4             0.0%     2    7.0   9.1   7.0  11.1   2.9
 5.|-- 127.0.0.5             0.0%     2   12.5  16.5  12.5  20.6   5.7
 6.|-- 127.0.0.6             0.0%     2   19.1  18.5  17.9  19.1   0.9
 7.|-- 127.0.0.7             0.0%     2   18.3  18.2  18.0  18.3   0.2
 8.|-- 127.0.0.8             0.0%     2   89.9  61.6  33.3  89.9  40.0
 9.|-- 127.0.0.9             0.0%     2   18.5  18.3  18.1  18.5   0.2
10.|-- 127.0.0.10            0.0%     2   20.4  19.8  19.2  20.4   0.8

mtr-exporter exposes the measured values like this:

# mtr run: 2020-03-08T16:37:05.000377Z
# cmdline: /usr/local/sbin/mtr -j -c 2 -n example.com
mtr_report_duration_ms_gauge{bitpattern="0x00",dst="example.com",psize="64",src="src.example.com",tests="2",tos="0x0"} 7179 1583685425000
mtr_report_count_hubs_gauge{bitpattern="0x00",dst="example.com",psize="64",src="src.example.com",tests="2",tos="0x0"} 10 1583685425000
mtr_report_loss_gauge{bitpattern="0x00",hop="first",count="1",dst="example.com",host="127.0.0.1",psize="64",src="src.example.com",tests="2",tos="0x0"} 0.000000 1583685425000
mtr_report_snt_gauge{bitpattern="0x00",hop="first",count="1",dst="example.com",host="127.0.0.1",psize="64",src="src.example.com",tests="2",tos="0x0"} 2 1583685425000
mtr_report_last_gauge{bitpattern="0x00",hop="first",count="1",dst="example.com",host="127.0.0.1",psize="64",src="src.example.com",tests="2",tos="0x0"} 0.380000 1583685425000
mtr_report_avg_gauge{bitpattern="0x00",hop="first",count="1",dst="example.com",host="127.0.0.1",psize="64",src="src.example.com",tests="2",tos="0x0"} 0.480000 1583685425000
mtr_report_best_gauge{bitpattern="0x00",hop="first",count="1",dst="example.com",host="127.0.0.1",psize="64",src="src.example.com",tests="2",tos="0x0"} 0.380000 1583685425000
mtr_report_wrst_gauge{bitpattern="0x00",hop="first",count="1",dst="example.com",host="127.0.0.1",psize="64",src="src.example.com",tests="2",tos="0x0"} 0.570000 1583685425000
mtr_report_stdev_gauge{bitpattern="0x00",hop="first",count="1",dst="example.com",host="127.0.0.1",psize="64",src="src.example.com",tests="2",tos="0x0"} 0.130000 1583685425000

Each hop gets a label "hop"="first", "hop"="last", "hop"="first_last" or "hop"="intermediate", depending where on the path to the destination the hop is.

Legacy: the last hop in the list of tested hosts contains the label "last"="true". Use hop=~".*last" in your Prometheus queries to achieve the same.

When prometheus scrapes the data, you can visualise the observed values:

Usage

$> mtr-exporter [FLAGS] -- [MTR-FLAGS]

FLAGS:
-bind       <bind-address>
            bind address (default ":8080")
-flag.deprecatedMetrics
            render deprecated metrics (default: false)
            helps with transition time until deprecated metrics are gone
-h
            show help
-jobs       <path-to-jobsfile>
            file describing multiple mtr-jobs. syntax is given below.
-label      <job-label>
            use <job-label> in prometheus-metrics (default: "mtr-exporter-cli")
-mtr        <path-to-binary>
            path to mtr binary (default: "mtr")
-schedule   <schedule>
            schedule at which often mtr is launched (default: "@every 60s")
            examples:
               @every <dur>  - example "@every 60s"
               @hourly       - run once per hour
               10 * * * *    - execute 10 minutes after the full hour
            see https://en.wikipedia.org/wiki/Cron
-tslogs
            use timestamps in logs
-watch-jobs <schedule>
            periodically watch the file defined via -jobs (default: "")
            if it has changed stop previously running mtr-jobs and apply
            all jobs defined in -jobs.
-version
            show version
MTR-FLAGS:
        see "man mtr" for valid flags to mtr.

At /metrics the measured values of the last run are exposed.

Examples

$> mtr-exporter -- example.com
# probe every minute "example.com"

$> mtr-exporter -- -n example.com
# probe every minute "example.com", do not resolve DNS

$> mtr-exporter -schedule "@every 30s" -- -G 1 -m 3 -I ven3 -n example.com
# probe every 30s "example.com", wait 1s for response, try a max of 3 hops,
# use interface "ven3", do not resolve DNS.

Jobs-File Syntax

# comment lines start with '#' are ignored
# empty lines are ignored as well
label -- <schedule> -- mtr-flags

Example:

quad9       -- @every 120s -- -I ven1 -n 9.9.9.9
example.com -- @every 45s  -- -I ven2 -n example.com

Requirements

Runtime:

• mtr-0.89 and newer (added --json support)

Build:

• golang-1.21 and newer

Building

$> git clone https://github.com/mgumz/mtr-exporter
$> cd mtr-exporter
$> make

One-off building and "installation":

$> go install github.com/mgumz/mtr-exporter/cmd/mtr-exporter@latest

License

see LICENSE file

Author(s)

• Mathias Gumz [email protected]