# Scale the whole chart down without uninstalling it: scaleDown: true renders # every Deployment/StatefulSet with replicas: 0 (and suspends CronJobs) and # takes precedence over any per-workload replicas value. PVCs, Secrets and # Services stay in place; scaleDown: false brings the workloads back up. scaleDown: false # The bridges RSS-Bridge offers, rendered into the ConfigMap as whitelist.txt # and mounted at /app/whitelist.txt. # # A list rather than a blob of file content: the file format is one bridge name # per line, and the application trims and filters every line before use # (lib/Configuration.php), so nothing is lost by modelling it as YAML - while a # hardcoded file body in the template could not be changed without editing the # chart. # # The single entry "*" is RSS-Bridge's own wildcard and enables every bridge. # It is the default here because it is exactly what the image does when no # whitelist.txt exists at all, so a default install behaves like stock # RSS-Bridge instead of silently serving nothing. Installations that want a # narrower set list the bridge names explicitly: # # whitelist: # - Youtube # - Heise # # Changing this value rolls the pod - the deployment carries a checksum over # the rendered ConfigMap (see rss-bridge.deployment.yaml). Without that the # change would not reach the running container at all: the whitelist is a # subPath mount, which the kubelet never refreshes. whitelist: - "*" rssBridge: # Replica count for this workload; 0 is allowed and scales it down. # The chart-global scaleDown flag takes precedence. replicas: 1 # Verified against the image, not assumed (issue #128). # # The image ships no USER and runs everything as root by default. It does, # however, run fully hardened once its writable paths are provided: nginx and # php-fpm both start, the front page renders and real bridges fetch feeds. # # uid/gid 33 is www-data, and it is not interchangeable: /app and every file # in it is owned by www-data in the image, nginx.conf declares "user # www-data" and the php-fpm pool declares "user = www-data". Both emit a # harmless notice that those directives are ignored when the master process # is not root, and then serve normally as uid 33. securityContext: pod: runAsNonRoot: true runAsUser: 33 runAsGroup: 33 fsGroup: 33 fsGroupChangePolicy: Always seccompProfile: type: RuntimeDefault container: allowPrivilegeEscalation: false readOnlyRootFilesystem: true runAsNonRoot: true capabilities: drop: - ALL # All three probes hit RSS-Bridge's own health action, which renders a fixed # 49-byte JSON document without touching the file cache or any remote site. # That keeps liveness free of external dependencies (guideline 3): a scraped # website going down, or a cache directory that is not writable, must not # restart the pod. # # Deliberately not "/": the front page enumerates every enabled bridge and # answers with roughly 1.5 MB, which is a wasteful thing to fetch every ten # seconds forever. livenessProbe: httpGet: path: /?action=health port: rss-bridge-port periodSeconds: 10 timeoutSeconds: 5 failureThreshold: 3 readinessProbe: httpGet: path: /?action=health port: rss-bridge-port periodSeconds: 10 timeoutSeconds: 5 failureThreshold: 3 # The startup probe gates liveness/readiness, so those need no # initialDelaySeconds. Startup budget = 5s * 30 = 150s, which is generous: # the container is ready in about two seconds (nginx plus php-fpm, no # migrations, no warm-up). startupProbe: httpGet: path: /?action=health port: rss-bridge-port periodSeconds: 5 timeoutSeconds: 5 failureThreshold: 30 # Extra environment variables. Values are rendered through tpl; the value, # secretKeyRef and configMapKeyRef forms are supported. # # RSS-Bridge maps RSSBRIDGE_
_ onto its config, so for example # "RSSBRIDGE_system_timezone: Europe/Berlin" works here. env: [] resources: # Limits are optional: memory and ephemeral-storage limits default to # limitFactor x the request, an explicitly set limit always wins, and a # CPU limit is only set when configured explicitly under "limits". limitFactor: 3 requests: cpu: 0.1 # Measured with the shipped image: about 59 MiB resident while idle and # roughly 89 MiB after serving feeds, so the previous 20Mi request was # a third of what the workload actually occupies around the clock. memory: 128Mi # The previous manifest requested 2Gi of ephemeral storage - identical to # its limit - and thereby reserved two gigabytes of node scheduling # capacity for a workload that does not come close to using it. # # Everything RSS-Bridge writes was enumerated by running the image with a # writable root filesystem, exercising every whitelisted bridge and then # reading the container's diff layer. The only path that grows is the # feed cache under /app/cache: 17 entries and 2.2 MB after fetching all # five bridges, largest single entry 196 KB, and the application purges # it on its own (FileCache enable_purge). /run and /var/lib/nginx add # under 100 KB together. # # 64Mi is therefore roughly thirty times the measured footprint while # freeing 97% of the old reservation. The limit below stays large, so # the decoupling costs no safety margin (same shape as gotenberg, #106). ephemeralStorage: 64Mi limits: # Set explicitly rather than left to limitFactor x request. # # memory: the manifest this chart replaces capped the container at # 100Mi, but five concurrent feed fetches were measured peaking at # 119 MiB - the old limit was already below the real peak, and php-fpm # is configured for up to five workers with a 128M PHP memory_limit # each. 512Mi covers the measured peak with room to spare and still # bounds a runaway bridge. memory: 512Mi # Unchanged from the previous manifest on purpose: a large cap costs # nothing (it reserves no capacity) and guarantees this change cannot # make eviction more likely than it is today. ephemeralStorage: 2Gi # No CPU limit by default (repo standard): CPU is compressible, so a limit # only throttles. The previous manifest capped CPU at 0.5. ingress: # Gates the whole Ingress template. Checked in both directions per guideline # 1: nothing outside this template reads an ingress value - the container # takes no domain in its environment and nginx serves as default_server # without a server_name - so switching the Ingress off frees every value # below, and none of them needs a separate required(). enabled: true clusterIssuer: null className: nginx # Extra annotations for the Ingress; merged with the cert-manager # cluster-issuer annotation the chart always sets. annotations: {} # The hosts this Ingress serves. Required - the chart ships no default, # because hostnames are installation data and have no business in a chart. # # Each entry is a host plus an OPTIONAL tlsSecretName: # # hosts: # - host: rss-bridge.example.com # - host: feeds.example.com # tlsSecretName: tls-legacy-feeds-ingress # # Entries sharing a tlsSecretName are grouped into one tls entry, so they # share a single certificate with several SANs. Entries with distinct names # get one certificate each. Omitting tlsSecretName falls back to the repo # convention, tls---ingress. # # DOCUMENTED DEVIATION - why the secret name is configurable at all: # # The repo convention (guideline 4) is exactly one TLS secret per Ingress, # named tls---ingress. The installation this chart takes over # has grown three separate secrets, one per host, from three years of # kubectl apply. Renaming them would not be a cosmetic cleanup: cert-manager # keys certificates by secret name, so three new names mean three fresh # issuances, and the service is unreachable on each host until its # certificate is issued. That is a self-inflicted outage plus three # avoidable Let's Encrypt issuances, for a deployment that has been running # untouched for over a year. # # Making host and secret name per-entry values keeps the existing names in # place today and turns the eventual consolidation onto one certificate - or # the retirement of the legacy hostnames - into a values change instead of a # template change (the explicit ask from cluster-config#33). hosts: null