Rhcos Brew

Brew (Red Hat Build System)

Brew is Red Hat's internal Koji instance for tracking package builds.

Related: rhcos-artifacts, bug-investigation

Web UI: https://brewweb.engineering.redhat.com/brew/

Prerequisites

• Red Hat VPN access required
• Anonymous read-only access works without Kerberos

Package Search

# Search by package name
brew search package <package-name>

# Examples
brew search package cri-o
brew search package conmon-rs

Build Search

# Get latest build for a tag
brew latest-build <tag> <package>

# Examples
brew latest-build rhaos-4.18-rhel-9-candidate cri-o
brew latest-build rhaos-4.19-rhel-10-candidate conmon-rs

# List all builds of a package
brew list-builds --package=<package>
brew list-builds --package=cri-o | head -20

Getting Build Information

# Get detailed build info (source, timestamps, tags)
brew buildinfo <nvr>
brew buildinfo cri-o-1.30.0-1.rhaos4.18.el9

# List tags a build is in
brew list-tags --build=<nvr>
brew list-tags --build=cri-o-1.30.0-1.rhaos4.18.el9

# List RPMs in a build
brew buildinfo <nvr> | grep -A100 "^RPMs:"

Tag Operations

# List all packages in a tag
brew list-pkgs --tag=<tag>
brew list-pkgs --tag=rhaos-4.18-rhel-9-candidate

# List latest builds in a tag
brew latest-build --all <tag>
brew latest-build --all rhaos-4.18-rhel-9-candidate | head -20

# Get tag info
brew taginfo <tag>
brew taginfo rhaos-4.18-rhel-9-candidate

NVR Naming Convention

NVR = Name-Version-Release

OpenShift-Specific Packages (Plashet/RHAOS)

Packages with rhaos in the release are OpenShift-specific and come from the plashet (RHAOS repo):

conmon-rs-0.6.6-0.rhaos4.18.el10.1
└──────┘ └───┘ └─────────────────┘
  name   ver        release
               └────┘ └──┘
              ocp4.18 rhel10

RHEL Packages

Packages from RHEL repos have a different release format:

kernel-5.14.0-570.94.1.el9_6.x86_64
└────┘ └───────────────┘ └───┘
 name       version       rhel9.6

Fast-Tracking RHEL Packages

Sometimes RHEL packages are tagged into plashets to fast-track a fix into OpenShift before it lands in the regular RHEL repos. In this case, a RHEL package appears in the rhaos-4.XX-rhel-Y tag but retains its original RHEL NVR format.

Package Sources

Common Tag Patterns

Finding Package History

# List all builds of a package chronologically
brew list-builds --package=<package> --reverse

# Compare two builds
brew buildinfo <nvr1>
brew buildinfo <nvr2>