Toolchain overview
Tooling that the prerequisites section installs and configures.
Reference
Excalidraw diagrams.
Ten diagrams covering the tutorial's architectures and flows.
Click any diagram to open it fullscreen. Each is also available as
.excalidraw source — open it on excalidraw.com to edit.
Hummingbird in the Red Hat ecosystem
Where Hummingbird sits relative to Fedora, RHEL, UBI, and OpenShift.
podman pull resolution
How podman resolves a Hummingbird image from quay.io into local containers-storage.
Debug sidecar pattern
A second container shares PID and network namespaces with the running Hummingbird container — replaces shell-into-container.
Two-stage build pattern
Hummingbird builder image compiles, Hummingbird runtime image runs. The runtime never ships a compiler.
SBOM and signing artifacts
Three artifacts attached to every image: signature, SBOM attestation, and provenance attestation.
Compose stack
Three services under podman-compose: web on Hummingbird Node, PostgreSQL, OpenTelemetry collector.
Debugging layers
Four-layer debug strategy: podman commands, structured logs, ephemeral debug sidecar, kubectl debug for clusters.
zstd:chunked layer format
How chunked compression enables partial pulls — only changed chunks travel on the wire.
chunkah layer split
Splitting a single OCI layer along directory or xattr boundaries for finer-grained caching.