fix(infra): cap celery workers at 2 so the shared node stops OOM-killing CI (refs #182)

Unset CELERY_WORKER_CONCURRENCY makes oz-celery and nrc-celery fork one
process per CPU — 22 each on the lab node, ~225 MB apiece — and Talos'
OOM controller was killing the runner mid-verify-stack. Same lever as the
uWSGI caps (#144/#145/#147); objecten-celery already defaults to 1.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

.gitea/workflows/deploy.yaml

@@ -27,10 +27,10 @@ jobs:
       # `kubectl port-forward` — runbook §5. Override with repo variables.
       TALOS_VM_IP: ${{ vars.TALOS_VM_IP }}
       TALOS_HOST: ${{ vars.TALOS_HOST }}
-      # Set it and the stack is published over TLS on <sub>.<domain> by the
-      # in-cluster edge (ADR-0035, runbook §10). Empty = NodePorts, as before.
-      PUBLIC_DOMAIN: ${{ vars.PUBLIC_DOMAIN }}
-      PUBLIC_EMAIL: ${{ vars.PUBLIC_EMAIL }}
+      # Set it when the labs Caddy publishes the portals: Keycloak's public https
+      # origin, e.g. https://big-auth.labs.respellion.tech (runbook, "Publishing
+      # through the labs Caddy").
+      KEYCLOAK_URL: ${{ vars.KEYCLOAK_URL }}
     steps:
       - uses: https://github.com/actions/checkout@v4
 
@@ -94,12 +94,10 @@ jobs:
       # Job template from wedging the upgrade (`cannot patch … with kind Job`).
       - name: Deploy the chart
         run: |
-          set -euo pipefail
-          publish="${PUBLIC_DOMAIN:+--set public.domain=$PUBLIC_DOMAIN --set public.email=${PUBLIC_EMAIL:-}}"
           make k8s-reseed \
             TALOS_HOST=${TALOS_HOST:-localhost} \
             K8S_REGISTRY=${TALOS_VM_IP:-192.168.122.173}:30500 \
-            K8S_SET="$publish"
+            K8S_SET="${KEYCLOAK_URL:+--set keycloakUrl=$KEYCLOAK_URL}"
 
       # `dev` is a mutable tag and helm sees an unchanged pod template, so the
       # new images only land on a restart (pullPolicy is already Always).
@@ -115,12 +113,6 @@ jobs:
       - name: Smoke the public register
         run: curl -fsS --retry 10 --retry-delay 6 --retry-all-errors http://localhost:30141/openbaar/register
 
-      # Cluster-wide, not just `big`: the first thing that can fail is the registry
-      # in its own namespace, and a scheduling problem shows up in the events, not
-      # in `rollout status` — which only ever says "timed out waiting".
-      - name: Pods and events on failure
+      - name: Pods on failure
         if: failure()
-        run: |
-          kubectl get pods -A -o wide || true
-          kubectl -n big get jobs || true
-          kubectl get events -A --sort-by=.lastTimestamp | tail -30 || true
+        run: kubectl -n big get pods,jobs || true

docs/runbooks/kubernetes-talos.md

@@ -366,36 +366,6 @@ immutable, so `helm upgrade` is rejected with `cannot patch "…" with kind Job`
 every time a PR is squash-merged to `main` (and on demand via *Run workflow*). PR CI is the
 merge gate, so the workflow deploys without re-running the checks.
 
-**Prerequisite: the VM must have been installed with the §1 patch.** A stock Talos config
-gives you a node that still carries the control-plane taint and knows nothing about the
-plain-HTTP registry, and the deploy hits those in that order: the `registry` pod sits
-`Pending` until `rollout status` times out, and once that is fixed every repo image fails to
-pull. Two separate fixes:
-
-```bash
-# on the Fedora host — 1. let workloads onto the only node (§1)
-export KUBECONFIG=~/talos-kubeconfig-local
-kubectl taint node --all node-role.kubernetes.io/control-plane-
-
-# 2. trust the in-cluster registry over plain HTTP (§2)
-cat > /tmp/registry-patch.yaml <<'YAML'
-machine:
-  registries:
-    mirrors:
-      "<TALOS_VM_IP>:30500":
-        endpoints:
-          - http://<TALOS_VM_IP>:30500
-YAML
-talosctl -n <TALOS_VM_IP> -e <TALOS_VM_IP> patch mc --patch @/tmp/registry-patch.yaml
-```
-
-Keep those two apart. On Talos 1.14 a patch that also sets
-`cluster.allowSchedulingOnControlPlanes` is rejected with *".cluster.allowSchedulingOnControlPlanes
-is already set in v1alpha1 config"* — the field moved out of the v1alpha1 schema, the same way
-`machine.install` did (§1) — and the rejection takes the whole patch with it, so the mirror
-silently doesn't land either. `kubectl taint` is the documented way (§1); it is undone if the
-node ever re-registers, which is a reboot, not a deploy.
-
 The cluster's API and registry are not exposed publicly, so the job forwards them over the
 same SSH hop the Gitea-runner pipeline uses:
 
@@ -427,30 +397,46 @@ Settings, all on the repository in Gitea:
 The last step smokes `GET /openbaar/register` through the openbaar portal, which exercises
 portal → Caddy → BFF → projection. An empty register passes; a 502 does not.
 
-### Reaching the portals from a laptop
-
-The deployed portals are pinned to `http://localhost:30180` for Keycloak (§5), so a browser
-needs **all five** browser-facing ports on its own localhost — the portal alone is not
-enough, and a missing Keycloak shows up as `ERR_CONNECTION_REFUSED` on
-`/realms/*/.well-known/openid-configuration` followed by an opaque `ERROR Error: [object Object]`.
-`make k8s-portals` does this when kubectl can reach the cluster; through the lab server one
-SSH does it without a kubeconfig at all:
-
-```bash
-ssh -N -p 6667 \
-  -L 30140:<TALOS_VM_IP>:30140 -L 30141:<TALOS_VM_IP>:30141 \
-  -L 30142:<TALOS_VM_IP>:30142 -L 30143:<TALOS_VM_IP>:30143 \
-  -L 30180:<TALOS_VM_IP>:30180 \
-  user@labs.respellion.tech
-```
-
-Then the §5 table's URLs work as written. The admin UIs (OpenZaak, Flowable, …) need no
-forward — they are server-rendered, so the VM's address is fine.
-
 Not covered: the portals still need `make k8s-portals` (or an SSH forward) to be usable in a
 browser, because PKCE needs a secure context (§5). Giving the server a hostname + TLS is the
 upgrade path.
 
+## Publishing through the labs Caddy
+
+The portals can be reached on real hostnames through the Caddy that already fronts
+`*.labs.respellion.tech` (repo `Infra`, `infra/development/`). The chain:
+
+```
+browser → Caddy (labs server, TLS) → openssh-server:3014x/30180
+        → reverse SSH tunnel → Fedora host → <TALOS_VM_IP>:3014x/30180 (NodePorts)
+```
+
+| URL | NodePort |
+|---|---|
+| `https://big-register.labs.respellion.tech` | 30141 openbaar |
+| `https://big-mijn.labs.respellion.tech` | 30140 self-service |
+| `https://big-behandel.labs.respellion.tech` | 30142 behandel |
+| `https://big-beheer.labs.respellion.tech` | 30143 beheer |
+| `https://big-auth.labs.respellion.tech` | 30180 Keycloak (`/admin` blocked) |
+
+HTTPS makes the portals a secure context, so PKCE works without port-forwards — but
+Keycloak's issuer must be the public origin. Deploy with it:
+
+```bash
+make k8s-up TALOS_HOST=localhost K8S_REGISTRY=<TALOS_HOST>:30500 \
+  K8S_SET="--set keycloakUrl=https://big-auth.labs.respellion.tech"
+```
+
+For deploy-on-merge, set the repository variable `KEYCLOAK_URL` to the same value.
+With it set, the `localhost` port-forwards (§5) no longer log in: the issuer is one string.
+
+One-time setup:
+
+1. Fedora host: install `infra/development/big-portals-tunnel.service` from the Infra repo
+   (instructions in the file).
+2. Labs server: deploy the Infra `Caddyfile` + `compose.yml` (Caddy joins the
+   `openssh_default` network to reach the tunnel ends).
+
 ## What is not ported
 
 - **Observability** (Tempo, Prometheus, Grafana) is defined but disabled — those are built

infra/docker-compose.yml

@@ -57,6 +57,9 @@ services:
       # share this anchor and ignore it — they don't run uwsgi.
       UWSGI_PROCESSES: "1"
       UWSGI_THREADS: "2"
+      # Same lever for oz-celery: unset, the worker forks one process per CPU (22 on the lab node,
+      # ~225 MB each), which OOM-killed the shared runner mid-verify-stack. Only celery reads it.
+      CELERY_WORKER_CONCURRENCY: "2"
       DJANGO_SETTINGS_MODULE: openzaak.conf.docker
       SECRET_KEY: ${OZ_SECRET_KEY:-dev-only-not-for-production}
       DB_HOST: oz-db
@@ -144,6 +147,8 @@ services:
       # 1 uWSGI worker, not the image default of 4×4 (#147) — see the oz-env note above.
       UWSGI_PROCESSES: "1"
       UWSGI_THREADS: "2"
+      # Two celery workers, not one per CPU — see the oz-env note above.
+      CELERY_WORKER_CONCURRENCY: "2"
       DJANGO_SETTINGS_MODULE: nrc.conf.docker
       SECRET_KEY: ${NRC_SECRET_KEY:-dev-only-not-for-production}
       DB_HOST: nrc-db

infra/helm/big-reference/templates/_helpers.tpl

@@ -135,6 +135,14 @@ cluster-internal hosts ({{ .Release.Namespace }}) and the node address
 {{- end }}
 {{- end -}}
 
+{{/*
+The origin a browser reaches Keycloak on: the issuer Keycloak pins and the
+authority the portals use, from one place so they cannot drift (ADR-0010).
+*/}}
+{{- define "big.keycloakUrl" -}}
+{{- .Values.keycloakUrl | default (printf "http://%s:%v" .Values.host (index .Values.nodePorts "keycloak")) -}}
+{{- end -}}
+
 {{- define "big.labels" -}}
 app.kubernetes.io/name: {{ .name }}
 app.kubernetes.io/instance: {{ .root.Release.Name }}

infra/helm/big-reference/templates/config.yaml

@@ -40,5 +40,5 @@ metadata:
 {{- include "big.labels" (dict "root" $ "name" (printf "portal-config-%s" $realm)) | nindent 4 }}
 data:
   config.json: |
-    { "authority": "{{ printf "http://%s:%v" $.Values.host (index $.Values.nodePorts "keycloak") }}/realms/{{ $realm }}" }
+    { "authority": "{{ include "big.keycloakUrl" $ }}/realms/{{ $realm }}" }
 {{- end }}

infra/helm/big-reference/templates/deployments.yaml

@@ -28,7 +28,7 @@ spec:
       {{- range $w.files }}
       {{- if hasPrefix "portal-config-" .configMap }}
       annotations:
-        checksum/portal-config: {{ printf "%s|%v" $.Values.host (index $.Values.nodePorts "keycloak") | sha256sum }}
+        checksum/portal-config: {{ include "big.keycloakUrl" $ | sha256sum }}
       {{- end }}
       {{- end }}
       labels:

infra/helm/big-reference/values.yaml

@@ -25,6 +25,11 @@
 # string, so browser tokens and the BFF's discovered issuer agree.
 host: 192.168.122.100
 
+# Set when a TLS proxy outside the cluster publishes Keycloak: the full origin, no
+# trailing slash. It replaces `host` + Keycloak's NodePort as the issuer and the
+# portals' authority (runbook, "Publishing through the labs Caddy").
+keycloakUrl: ""
+
 # Set when pulling from a private registry (e.g. the Gitea Container Registry).
 imagePullSecrets: []
 
@@ -71,6 +76,7 @@ envGroups:
   oz:
     UWSGI_PROCESSES: "1"
     UWSGI_THREADS: "2"
+    CELERY_WORKER_CONCURRENCY: "2"
     DJANGO_SETTINGS_MODULE: openzaak.conf.docker
     SECRET_KEY: dev-only-not-for-production
     DB_HOST: oz-db
@@ -93,6 +99,7 @@ envGroups:
   nrc:
     UWSGI_PROCESSES: "1"
     UWSGI_THREADS: "2"
+    CELERY_WORKER_CONCURRENCY: "2"
     DJANGO_SETTINGS_MODULE: nrc.conf.docker
     SECRET_KEY: dev-only-not-for-production
     DB_HOST: nrc-db
@@ -268,7 +275,7 @@ workloads:
       # Pin the issuer to the address the browser uses, and let backchannel calls
       # keep using keycloak:8080 — the BFF discovers metadata in-cluster and gets
       # this issuer back, which is what browser tokens carry (infra/host-browser.yml).
-      KC_HOSTNAME: "http://{{ .Values.host }}:{{ index .Values.nodePorts \"keycloak\" }}"
+      KC_HOSTNAME: '{{ include "big.keycloakUrl" . }}'
       KC_HOSTNAME_BACKCHANNEL_DYNAMIC: "true"
     ports: [{ name: http, port: 8080 }]
     # TCP, not /health/ready on the management port: nothing here gates on realm