stuartnelson3 / passenger_exporter Goto Github PK

prometheus passenger exporter for nginx integration

License: MIT License

Makefile 2.92% Go 96.71% Dockerfile 0.36%

passenger_exporter's Introduction

************************
passenger_exporter_nginx
------------------------

This is a Prometheus exporter for passenger with nginx integration.

https://www.phusionpassenger.com/

*********************
Building the Exporter
---------------------

The default Makefile target creates a statically linked binary for Linux.

A Dockerfile and Makefile target are also supplied:

make build-docker

********************
Running the Exporter
--------------------

Usage of passenger_exporter_nginx:
  -log.format value
      If set use a syslog logger or JSON logging.
      Example: logger:syslog?appname=bob&local=7 or logger:stdout?json=true.
      Defaults to stderr.
  -log.level value
      Only log messages with the given severity or above.
      Valid levels: [debug, info, warn, error, fatal]. (default info)
  -passenger.command string
      Passenger command for querying passenger status.
      (default "passenger-status --show=xml")
  -passenger.pid-file string
    	Optional path to a file containing the passenger/nginx PID for additional metrics.
  -passenger.command.timeout duration
      Timeout for passenger.command. (default 500ms)
  -web.listen-address string
      Address to listen on for web interface and telemetry. (default ":9149")
  -web.telemetry-path string
      Path under which to expose metrics. (default "/metrics")

To run the Docker image:

docker run -p 9106:9106 -v $PATH_TO_PASSENGER_STATUS:/bin \
        passenger_exporter_nginx:latest /passenger_exporter_nginx

Notes for running the Docker container:

- You must mount the passenger-status binary within the container to
  have access.
- You must expose the -web.listen-address port on the container to be scraped.

**********
Collectors
----------

An example of the metrics exported can be seen in testdata/scrape_output.txt

*************
Running Tests
-------------

Tests can be run with:

go test .

Additionally, the testdata/scrape_output.txt can be regenerated by passing the
--golden flag:

go test -v . --golden

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passenger_exporter's Issues

panic: runtime error: index out of range

I have installed passenger_exporter on ubuntu 16.04 system and the process kills itself after some random time.

$ sudo systemctl status passenger_exporter
● passenger_exporter.service - Passenger Exporter
   Loaded: loaded (/etc/systemd/system/passenger_exporter.service; disabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Mon 2018-12-24 09:39:45 UTC; 1h 39min ago
  Process: 1453 ExecStart=/usr/local/bin/passenger_exporter -passenger.command /usr/sbin/passenger-status --show=xml (code=exited, status=2)
 Main PID: 1453 (code=exited, status=2)

Dec 24 09:28:34 localhost systemd[1]: Started Passenger Exporter.
Dec 24 09:28:34 localhost passenger_exporter[1453]: time="2018-12-24T09:28:34Z" level=info msg="Starting passenger-exporter (version=, bra
Dec 24 09:28:34 localhost passenger_exporter[1453]: time="2018-12-24T09:28:34Z" level=info msg="Build context (go=go1.11, user=, date=)" s
Dec 24 09:28:34 localhost passenger_exporter[1453]: time="2018-12-24T09:28:34Z" level=info msg="Listening on :9149" source="passenger_expo
Dec 24 09:39:45 localhost passenger_exporter[1453]: panic: runtime error: index out of range
Dec 24 09:39:45 localhost systemd[1]: passenger_exporter.service: Main process exited, code=exited, status=2/INVALIDARGUMENT
Dec 24 09:39:45 localhost systemd[1]: passenger_exporter.service: Unit entered failed state.
Dec 24 09:39:45 localhost systemd[1]: passenger_exporter.service: Failed with result 'exit-code'.

Repository address in .promu.yml doesn't exist

Running go get github.com/stuartnelson3/passenger_exporter and then make results in:

can't load package: package github.com/stuartnelson3/passenger_exporter_nginx: cannot find package "github.com/stuartnelson3/passenger_exporter_nginx".

.promu.yml refers to github.com/stuartnelson3/passenger_exporter_nginx which doesn't seem to exist (note "_nginx" suffix) - possibly this is a mistake?

Get PID from passenger-status

Hey

Is there any way to get the PID from the passenger-status output?
i'm trying to get this from the "passenger_nginx_proc_memory" metric.

Here's an example.

PID: 12352 Sessions: 0 Processed: 0 Uptime: 3h 12m 46s
CPU: 0% Memory : 9M Last used: 3h 12m 4

Grafana dashboard for this exporter

Create a Grafana dashboard and include it with the exporter.
If anyone has a Grafana dashboard make it available on grafana.org and send it to @stuartnelson3 .

Default port is already used by a prometheus exporter

Please follow https://prometheus.io/docs/instrumenting/writing_exporters/#port-numbers

The exporter does not work with multiple passenger applications.

If there are several passenger apps running, the exporter will return the following error:

An error has occurred during metrics collection:

collected metric passenger_nginx_app_group_queue label:<name:"default" value:"true" > gauge:<value:0 > was collected before with the same name and label values

This is due to this metric:

passenger_exporter/main.go

Line 169 in 6b9b629

 ch <- prometheus.MustNewConstMetric(e.appGroupQueue, prometheus.GaugeValue, parseFloat(sg.Group.GetWaitListSize), sg.Group.Default) 

that uses label: default, but its value is always true:

Below is the edited output of passenger-status --show=xml when runing two apps.

<?xml version="1.0" encoding="iso8859-1"?>
<info version="3">
   <passenger_version>6.0.1</passenger_version>
   <group_count>2</group_count>
   <process_count>6</process_count>
   <max>6</max>
   <capacity_used>6</capacity_used>
   <get_wait_list_size>0</get_wait_list_size>
   <supergroups>
      <supergroup>
         <name>APP_1-NAME</name>
         <state>READY</state>
         <get_wait_list_size>0</get_wait_list_size>
         <capacity_used>3</capacity_used>
         <group default="true">
            <name>APP_1-NAME</name>
            <component_name>APP_1-NAME</component_name>
            <app_root>/path/to/APP_1/current</app_root>
            ....
            <options>
               <app_root>/path/to/APP_1/current</app_root>
               <app_group_name>APP_1-NAME</app_group_name>
               <app_type>ruby</app_type>
               ....
            </options>
            <processes>
               <process>
                  <pid>5465</pid>
                  ....
               </process>
            </processes>
         </group>
      </supergroup>
      <supergroup>
         <name>APP_2-NAME</name>
         <state>READY</state>
         <get_wait_list_size>0</get_wait_list_size>
         <capacity_used>3</capacity_used>
         <group default="true">
            <name>APP_2-NAME</name>
            <component_name>APP_2-NAME</component_name>
            <app_root>/path/to/APP_2/current</app_root>
            <app_type>ruby</app_type>
            ....
            <options>
               <app_root>/path/to/APP_2/current</app_root>
               <app_group_name>APP_2-NAME</app_group_name>
               <app_type>ruby</app_type>
               ....
            </options>
            <processes>
               <process>
                  <pid>27619</pid>
                  ....
               </process>
            </processes>
         </group>
      </supergroup>
   </supergroups>
</info>

Notice the two <group default="true"> elements.

Do you know if this can be solved with some passenger configuration options? or should the metric label be changed ?

Unable to parse config file: .promu.yml

CGO_ENABLED=0 GOOS=linux GOARCH=amd64 promu build --prefix /home/micah/working/passenger_exporter
Unable to parse config file: .promu.yml
!! yaml: unmarshal errors:
  line 1: cannot unmarshal !!str `1.10.1` into struct { CGo bool; Version string }
make: *** [Makefile:16: passenger_exporter_nginx] Error 1

stuartnelson3 / passenger_exporter Goto Github PK

passenger_exporter's Introduction

passenger_exporter's People

Contributors

Stargazers

Watchers

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passenger_exporter's Issues

panic: runtime error: index out of range

Repository address in .promu.yml doesn't exist

Get PID from passenger-status

Grafana dashboard for this exporter

Default port is already used by a prometheus exporter

The exporter does not work with multiple passenger applications.

Unable to parse config file: .promu.yml

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