Open engineering lab · 2026

LegacyOps 2026

A delivery lab comparing Compose, Kubernetes, and Helm paths while keeping build, publishing, health, and readiness expectations consistent.

DockerGitHub ActionsJenkinsGHCRHelm

The comparison

Teams often debate deployment tools before agreeing on the guarantees a release must provide. LegacyOps reverses that order: define the build and verification contract, then compare how each runtime path satisfies it.

Shared release expectations

Build a versioned container artifact.
Publish through an authenticated registry workflow.
Deploy through a reviewed configuration path.
Verify HTTP, health, and readiness behavior.
Leave logs that explain where a failed release stopped.

Delivery contract

Different tools, same operational questions.

A release is not successful merely because a command exited with status zero.

01 · Build

One artifact moves forward

The tested image is the image promoted, reducing differences between environments.

02 · Publish

Registry identity stays explicit

Authentication and immutable version tags are part of the documented workflow.

03 · Configure

Runtime differences remain visible

Compose, Kubernetes, and Helm are compared without pretending their operational models are identical.

04 · Verify

Health means useful service

HTTP 200, health, and readiness checks are treated as separate signals with different purposes.

05 · Diagnose

Logs follow the release stages

Checkout, build, publish, deploy, and verify each produce a distinct failure location.

06 · Recover

Rollback belongs in the design

Versioned artifacts and configuration history make reversing a release deliberate rather than improvised.

Representative pipeline

jobs:
  build:
    steps:
      - uses: actions/checkout@v4
      - name: Build image
        run: docker build -t "$IMAGE_TAG" .
      - name: Publish image
        run: docker push "$IMAGE_TAG"
      - name: Verify staging
        run: curl --fail "$STAGING_URL/health"

The real workflow adds authentication, caching, scanning, environment protection, rollout status, and failure reporting. The shortened example makes the delivery contract easier to see.