boynux / squid-exporter

Squid Prometheus exporter

Exports squid metrics in Prometheus format

NOTE: From release 1.0 metric names and some parameters has changed. Make sure you check the docs and update your deployments accordingly!

New

• Using environment variables to configure the exporter
• Adding custom labels to metrics

Usage:

Simple usage:

squid-exporter -squid-hostname "localhost" -squid-port 3128

Configure Prometheus to scrape metrics from localhost:9301/metrics

- job_name: squid
  # squid-exporter is installed, grab stats about the local
  # squid instance.
  target_groups:
    - targets: ['localhost:9301']

To get all the parameteres, command line arguments always override default and environment variables configs:

squid-exporter -help

The following environment variables can be used to override default parameters:

SQUID_EXPORTER_LISTEN
SQUID_EXPORTER_METRICS_PATH
SQUID_HOSTNAME
SQUID_PORT
SQUID_LOGIN
SQUID_PASSWORD
SQUID_EXTRACTSERVICETIMES

Usage with docker:

Basic setup assuming Squid is running on the same machine:

docker run --net=host -d boynux/squid-exporter

Setup with Squid running on a different host

docker run -p 9301:9301 -d boynux/squid-exporter -squid-hostname "192.168.0.2" -squid-port 3128 -listen ":9301"

With environment variables

docker run -p 9301:9301 -d -e SQUID_PORT="3128" -e SQUID_HOSTNAME="192.168.0.2" -e SQUID_EXPORTER_LISTEN=":9301" boynux/squid-exporter

Build:

This project is written in Go, so all the usual methods for building (or cross compiling) a Go application would work.

If you are not very familiar with Go you can download the binary from releases.

Or build it for your OS:

go install https://github.com/boynux/squid-exporter

then you can find the binary in: $GOPATH/bin/squid-exporter

Features:

• Expose Squid counters
  • Client HTTP
  • Server HTTP
  • Server ALL
  • Server FTP
  • Server Other
  • ICP
  • CD
  • Swap
  • Page Faults
  • Others
• Expose Squid service times
  • HTTP requests
  • Cache misses
  • Cache hits
  • Near hits
  • Not-Modified replies
  • DNS lookups
  • ICP queries
• Histograms
• Other metrics
• Squid Authentication (Basic Auth)

FAQ:

• Q: Metrics are not reported by exporter

• A: That usually means the exporter cannot reach squid server or the config manager permissions are not set corretly. To debug and mitigate:

  • First make sure the exporter service can reach to squid server IP Address (you can use telnet to test that)
  • Make sure you allow exporter to query the squid server in config you will need something like this (172.20.0.0/16 is the network for exporter, you can also use a single IP if needed):

  #http_access allow manager localhost
  acl prometheus src 172.20.0.0/16
  http_access allow manager prometheus
  

• Q: Why process_open_fds metric is not exported?

• A: This usualy means exporter don't have permission to read /proc/<squid_proc_id>/fd folder. You can either

1. [recommended] Set CAP_DAC_READ_SEARCH capability for squid exporter process (or docker). (eg. sudo setcap 'cap_dac_read_search+ep' ./bin/squid-exporter)
2. [not recommended] Run the exporter as root.

Contribution:

Pull request and issues are very welcome.

If you found this program useful please consider donations

Copyright:

MIT License