helm-charts/ci/keycloak/test-values.yaml

# CI values for the keycloak install-test.
#
# WHY THIS CHART IS TESTED RATHER THAN EXCLUDED, and what a green run is worth.
# Keycloak has no volume, needs one throwaway PostgreSQL and reaches Ready on
# its own, so an exclusion would be hard to justify. More importantly, this is
# the only place where the four riskiest assumptions of the chart are exercised
# at all - none of them is observable in a render.
#
# WHAT A GREEN RUN PROVES, point by point (the measurement points of Gitea #83):
#
#   1. THE TWO INIT CONTAINERS WORK AT ALL. The seed container copies the
#      image's own augmentation output into the volume, the build container
#      mounts that volume at /opt/keycloak/lib/quarkus and runs `kc.sh build`
#      into it - both with readOnlyRootFilesystem: true. If the seeding
#      assumption were wrong (QuarkusEntryPoint loads
#      quarkus/quarkus-application.dat before it dispatches any command,
#      `build` included), the build container could not start, and the pod
#      would sit in Init with the reason only in its log.
#   2. readOnlyRootFilesystem: true HOLDS FOR THE SERVING CONTAINER, with
#      emptyDirs only at /opt/keycloak/lib/quarkus, /opt/keycloak/data and
#      /tmp - and NOT at /opt/keycloak/conf, which would hide the
#      cache-ispn.xml that cache=ispn reads.
#   3. `start --optimized` ACCEPTS THE PRE-BUILT INSTALLATION and does not
#      re-augment. A disagreement between the build options and the serving
#      container would show up here as a crash loop rather than as a slow
#      start, because the path it would want to rewrite is read-only.
#   4. TWO REPLICAS BOTH COME UP AND STAY UP against one database - the
#      rollout is complete only when BOTH pods are Ready, so a second replica
#      that crashed, deadlocked on the schema migration lock or fought the
#      first over the database would fail the run. Measured in Gitea PR #87:
#      71.8s from `helm install` to both Ready, 0 restarts - three runs, all
#      three 72s and 0 restarts.
#      THAT WAS LUCK, OR A FAST WEEK, AND NOT AN INVARIANT - which took an A/B
#      inside Gitea PR #92 to establish, because the first five runs there made
#      it look like the new theme mount had destabilized the start:
#          WITH the theme mount    (spec of #88)
#              run 585: 101s, ONE restart on one pod
#              run 590:  82s, 0
#              run 593: 191s, 0
#              run 595: 101s, ONE
#              run 597: 111s, ONE          -> 3 of 5
#          WITHOUT it (the same branch, the pair commented out; pod template
#          hash 5844db56b6, i.e. BYTE-IDENTICAL to the spec PR #87 measured)
#              run 598:  81s, 0
#              run 599: 171s, ONE          -> 1 of 2
#      So the restart happens WITHOUT the mount as well, and #88 is not its
#      cause. It is pre-existing, intermittent behaviour of THIS chart's first
#      install: always exactly one restart on one pod, 35-80s before that pod
#      reports Ready. It does not track the runner's speed either - the fastest
#      (81s) and the slowest (191s) run of the whole series restarted nothing.
#      WHAT THE RESTART IS HAS NOT BEEN ESTABLISHED, and that is the finding
#      worth keeping: the harness dumps container logs only when a run FAILS
#      (diagnose() hangs off the EXIT trap behind "RC -ne 0") and all seven runs
#      PASSED - A GREEN RUN CANNOT EXPLAIN A RESTART IT REPORTS. Answering it
#      means making the final-state step print the restart reasons whenever a
#      counter is above zero; that is a change to ci/run-install-test.sh with a
#      CI-CD wiki obligation of its own, and it was deliberately NOT made inside
#      #88. A first install that serializes two replicas on the Liquibase
#      migration lock is a plausible place for it - stated as the hypothesis it
#      is, because nothing here measured it.
#      THE METHOD IS THE PART TO REUSE: a counter that moved in the same round
#      as a change is not evidence against the change until the control case has
#      run on the SAME machine. Three clean runs two days earlier were not that
#      control, and treating them as one would have cost this PR its conclusion
#      in both directions.
#   5. A MOUNTED LOGIN THEME SURVIVES ALL OF THAT (Gitea #88) - the full
#      argument sits at keycloak.extraVolumes further down, including what it
#      still does not prove.
#   Plus the mechanical half: the Secret key names match what the Deployment
#   references, /health/started, /health/live and /health/ready all answer on
#   the management port (so health-enabled really was baked in by the init
#   container), the resource quantities are valid, and the schema accepts a
#   realistic non-default values file.
#
# WHAT IT DOES NOT PROVE, and the first entry is the one not to misread:
#   - THAT jdbc-ping ACTUALLY FOUND THE PEER. Two replicas both reaching Ready
#     is NOT that proof, and believing it was is the mistake this paragraph
#     exists to prevent: readiness reports this node's own health, so a node
#     that never found its peer is Ready, healthy and alone - and two such
#     nodes are two islands that each believe they are the cluster. The
#     Infinispan view has to be read out of the log, which is what step 2 of
#     NOTES.txt tells the operator to do. So measurement point 4 of the plan
#     stays open after this test; what the test does rule out is the louder
#     half (a second replica that cannot start or cannot share the database).
#   - that hostname-admin serves the console cleanly on a second hostname. No
#     ingress controller answers in CI and nothing drives a browser, so
#     measurement point 5 stays open too. What IS checked is that both Ingress
#     objects are accepted, that the Service port they name exists, and that
#     Keycloak accepts both hostname values as full URLs at start.
#   - anything about an upgrade. The rolling-update restriction between minor
#     versions is a property of two versions meeting, and this test installs
#     one.
#   - that the PostgreSQL here resembles production. It is one pod with an
#     emptyDir, so nothing about durability, connection limits or latency
#     transfers.

secrets:
  # Materialized by ci/keycloak/fixtures.yaml as ci-keycloak-db-secret and
  # ci-keycloak-bootstrap-admin-secret (the OnePasswordItem stub CRD comes from
  # ci/common/).
  databaseSecretRef: op://ci/keycloak-db
  bootstrapAdminSecretRef: op://ci/keycloak-bootstrap-admin

keycloak:
  # TWO, i.e. the chart's default, and the whole reason this fixture is not a
  # one-replica shortcut. With one replica the install-test would be green
  # without ever showing whether the second node is found - and "a path the
  # test does not walk is a path we have not proven" is the lesson Gitea #80
  # paid for. The install-test script waits for the Deployment's rollout, and a
  # rollout is only complete when BOTH pods are Ready, so cluster formation is
  # inside the assertion rather than next to it.
  replicas: 2

  db:
    # The throwaway PostgreSQL from fixtures.yaml. Plain Service name: both are
    # in the same namespace.
    host: postgres
    database: keycloak
    # Small but not degenerate: 2 replicas x 5 = 10 connections against
    # postgres:16-alpine's default max_connections of 100, which leaves the
    # fixture comfortable while still exercising the pool options.
    pool:
      initialSize: 1
      minSize: 1
      maxSize: 5

  # The chart default, spelled out because it is load-bearing for what this
  # test means: metrics-enabled is what puts the DATABASE check into
  # /health/ready (upstream's check table, "Requires Metrics: Yes"). With it
  # off, readiness would pass without ever touching the database, and a green
  # run would say nothing about the connection at all.
  #
  # It is also a BUILD option, so with it true the init container has to build
  # an installation differing from the published image in three options rather
  # than two - which is what makes a build that silently did nothing fail the
  # run instead of looking identical.
  metrics:
    enabled: true

  # Set on purpose, although one release cannot collide with itself: it
  # exercises the KC_CACHE_EMBEDDED_CLUSTER_NAME path, and a name Keycloak
  # rejected would fail the start rather than pass unnoticed.
  cache:
    clusterName: ci-keycloak

  resources:
    # Below the chart's defaults to stay inside the runner's budget, and the
    # memory number is chosen rather than rounded: the image sizes the heap at
    # 70% of the LIMIT, so 600Mi x limitFactor 3 = 1800Mi gives a ~1260Mi heap.
    # Upstream's floor is "at least 750 MB" for the limit; going much below
    # this makes the JVM the reason a run fails.
    requests:
      cpu: 250m
      memory: 600Mi
      ephemeral-storage: 256Mi

  build:
    resources:
      requests:
        cpu: 250m
        memory: 512Mi
        ephemeral-storage: 256Mi

  # THE EXTRA VOLUME PAIR, WALKED RATHER THAN RENDERED (Gitea #88). The theme
  # ConfigMap comes from fixtures.yaml. Three things this puts inside the
  # assertion that no render reaches:
  #
  #   1. A MOUNT ON A SUBPATH OF A DIRECTORY THAT EXISTS IN THE IMAGE IS
  #      ACCEPTED ALONGSIDE readOnlyRootFilesystem: true.
  #      /opt/keycloak/themes/ci-theme does not exist in the image, so the
  #      runtime has to create the mount point inside a root filesystem that is
  #      about to be read-only. If that did not work, every container of this
  #      pod would fail to start.
  #   2. `kc.sh build` STILL SUCCEEDS WITH THE EXTRA MOUNT PRESENT. The mounts
  #      are rendered on the build init container too (that is what makes SPI
  #      providers work at all), so this fixture is also the test that the extra
  #      mount does not disturb the augmentation - a failure would leave the pod
  #      in Init with the reason only in a log.
  #   3. `start --optimized` COMES UP WITH A RUNTIME THEME IN PLACE. The plan of
  #      #88 called that "a reasoned expectation, not verified"; a Ready pod with
  #      this mounted is the verification, and it is the one that matters for the
  #      unusual two-init-container construction of this chart.
  #
  # WHAT IT STILL DOES NOT PROVE, and it would be easy to overclaim here: that
  # the LOGIN PAGE renders and that base/keycloak/keycloak.v2 are still listed.
  # The health endpoints answer regardless of the themes directory, and nothing
  # in this harness makes an HTTP request to / or runs a command in the pod. That
  # the subpath hides nothing is a property of the mount path rather than a
  # measurement - and the kcLogoIdP line needs a browser plus a realm setting,
  # neither of which exists in CI.
  extraVolumes:
    - name: login-theme
      configMap:
        name: ci-keycloak-theme
        items:
          - key: theme.properties
            path: login/theme.properties
  extraVolumeMounts:
    - name: login-theme
      # THE SUBPATH, AND THE WHOLE POINT OF THE EXAMPLE: a volume on
      # /opt/keycloak/themes would hide the image's own three themes and break
      # the login page while the pod stayed Ready.
      mountPath: /opt/keycloak/themes/ci-theme
      readOnly: true

ingress:
  # Left ON although no ingress controller answers in CI: the point is that
  # both objects are accepted and that the Service port they name BY NAME
  # ("http") actually exists - a typo there is otherwise invisible until
  # somebody opens the URL.
  enabled: true
  domain: keycloak.ci.example.com
  clusterIssuer: ci-selfsigned
  admin:
    # The second hostname, on as well, so the chart renders KC_HOSTNAME_ADMIN
    # and Keycloak has to accept it as a full URL. That is the half of
    # measurement point 5 a cluster-less test can reach: Keycloak validates
    # both hostname values at start ("verified that full URL is used, incl.
    # scheme and hostname"), so a chart that built a bare host here would fail
    # the start instead of serving a broken console later.
    enabled: true
    domain: keycloak-admin.ci.example.com