jfxs/alpine-squid repository overview

⁠Docker Alpine Squid

A Squid⁠ Docker image:

• lightweight image based on Alpine Linux only 8 MB,
• multiarch with support of amd64 and arm64,
• non-root container user,
• automatically updated by comparing software bill of materials (SBOM) changes,
• image signed with Cosign⁠,
• a software bill of materials (SBOM) attestation added using Syft⁠,
• available on Docker Hub and Quay.io.

The main repository.

The Docker Hub registry.

The Quay.io registry.

⁠Running the Squid proxy

docker run -d --rm --name squid -p 3128:3128 jfxs/alpine-squid

or

docker run -d --rm --name squid -p 3128:3128 quay.io/ifxs/alpine-squid

The configuration of Squid is the default one, with some additions:

/etc/squid/squid.conf

# Include a folder of config files
include /etc/squid/conf.d/*.conf

/etc/squid/conf.d/squid-docker.conf

# Allow from all hosts
acl all src 0.0.0.0/0
http_access allow all
# Specific configuration for Docker usage
pid_filename none
logfile_rotate 0
access_log stdio:/dev/stdout
cache_log stdio:/dev/stderr

/!\ There is no filtering access to Squid.

⁠Built with

Docker latest tag is 7.6.0-001, 7.6, 7⁠ and has:

Dockerhub Overview page⁠ has the details of the last published image.

⁠Versioning

Docker tag definition:

• the Squid version used,
• a dash
• an increment to differentiate build with the same version starting at 001

<squid_version>-<increment>

Example: 5.7.0-003

⁠Signature and attestation

Cosign⁠ public key:

-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEa3yV6+yd/l4zh/tfT6Tx+zn0dhy3
BhFqSad1norLeKSCN2MILv4fZ9GA6ODOlJOw+7vzUvzZVr9IXnxEdjoWJw==
-----END PUBLIC KEY-----

The public key is also available online: https://gitlab.com/op_so/docker/cosign-public-key/-/raw/main/cosign.pub⁠.

To verify an image:

cosign verify --key cosign.pub $IMAGE_URI

To verify and get the software bill of materials (SBOM) attestation:

cosign verify-attestation --key cosign.pub --type spdxjson $IMAGE_URI | jq '.payload | @base64d | fromjson | .predicate'

⁠Authors

• FX Soubirou - Initial work - GitLab repositories⁠

⁠License

This program is free software: you can redistribute it and/or modify it under the terms of the MIT License (MIT). See the LICENSE⁠ for details.