feat(storage): MinIO Console mobile CSS via nginx proxy #350
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ldraney/pal-e-platform!350
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Summary
Deploys an nginx reverse proxy in the minio namespace that injects mobile-responsive CSS into MinIO Console HTML responses via
sub_filter. The Tailscale funnel now routes through this proxy instead of hitting the console directly, making MinIO Console usable on phone-sized viewports (390px) without modifying MinIO itself.Changes
terraform/modules/storage/main.tf-- Added 4 new resources:kubernetes_config_map_v1.minio_console_nginx-- nginx.conf that proxies tominio-console:9001, stripsAccept-Encodingto enablesub_filter, injects<link>tag before</head>kubernetes_config_map_v1.minio_console_css-- mobile-first CSS targeting MUI class names (sidebar collapse, grid stacking, table horizontal scroll, dialog fullscreen, compact toolbar)kubernetes_deployment_v1.minio_console_proxy-- single-replica nginx:1.27-alpine with ConfigMap volume mounts, health checks, and content-hash annotations for automatic rollout on CSS changeskubernetes_service_v1.minio_console_proxy-- ClusterIP service on port 80 targeting nginx on 8080terraform/modules/networking/main.tf-- Updatedminio_funnelingress backend fromminio-console:9001tominio-console-proxy:80Test Plan
tofu validatepassestofu applydeploys 4 new resources + 1 ingress updatehttps://minio.<tailscale_domain>loads Console with injected CSS visible in page sourceReview Checklist
Related Notes
ldraney/pal-e-platform #346-- MinIO Console mobile-responsive CSS via nginx sidecar injectionpal-e-platform-- bootstrap infrastructure projectCloses #346
QA Review -- PR #350
Scope Check
Architecture Review
The approach is sound: standalone nginx Deployment + Service acting as a reverse proxy in front of
minio-console:9001, withsub_filterinjecting a CSS<link>tag. This avoids modifying MinIO itself and keeps the CSS in a ConfigMap for easy iteration.Positive patterns:
Accept-Encoding ""correctly strips compression sosub_filtercan operate on response bodyFindings
[NIT] Nginx
Connectionheader set unconditionally (line 217)Setting
proxy_set_header Connection "upgrade"on every request is a common pattern for websocket-capable proxies and will not break non-websocket traffic (the header is simply ignored). However, a more precise approach usesmapto conditionally set the header only when$http_upgradeis present. Not a blocker -- MinIO Console uses websockets on most pages anyway.[NIT] CSS
revertkeyword browser supportThe desktop
@mediablock usesrevert !importantextensively.reverthas good modern browser support but does not work in older browsers. Since this is an internal admin tool accessed by known users on modern browsers, this is acceptable.[NIT] Sidebar fully hidden on mobile with no toggle
The CSS collapses the sidebar to
width: 0with no way to access navigation on mobile. Users will need to navigate via URL or back button. A hamburger menu toggle would require JS injection which is out of scope for CSS-only injection. Acceptable for v1 -- navigation is limited on MinIO Console.SOP Compliance
tofu fmt-- no formatting changes neededtofu validate-- passestofu plan-- requires cluster backend, cannot run in worktree (expected)346-minio-mobile-cssfollows{issue}-{slug}conventionCloses #346VERDICT: APPROVED
All findings are NITs. The architecture is clean, the nginx proxy pattern is correct, and the CSS is well-structured with proper mobile-first approach and desktop revert. Ready for
tofu applyvalidation.PR #350 Review
DOMAIN REVIEW
Tech stack: Terraform/HCL (OpenTofu), Kubernetes resources, nginx configuration.
Terraform quality:
kubernetes_namespace_v1.minio.metadata[0].name,kubernetes_config_map_v1.minio_console_nginx.metadata[0].name) -- no hardcoded namespace strings.sha256()content-hash annotations on the Deployment template ensure ConfigMap changes trigger pod rollouts. Good pattern.depends_on = [helm_release.minio]correctly gates the proxy on MinIO existing./custom/mobile.csson port 8080.Kubernetes security:
nginx:1.27-alpineis a minor-version pin -- acceptable for infra, though a digest pin would be ideal.read_only = true. Good.nginx configuration review:
proxy_set_header Upgrade $http_upgradeandproxy_set_header Connection "upgrade"are present in thelocation /block. This will pass through websocket connections for MinIO Console real-time updates.Host,X-Real-IP,X-Forwarded-For, andX-Forwarded-Protoheaders, which is correct for preserving the request context through OIDC redirects. MinIO's OIDC flow should work since the proxy is transparent to the auth exchange.Accept-Encoding ""strips compression from the upstream response sosub_filtercan operate on the raw HTML body.sub_filter_once onandsub_filter_types text/htmlare correct -- the CSS<link>tag will be injected once, only into HTML responses./custom/location withaliascorrectly serves the ConfigMap-mounted CSS with caching headers (expires 1h,Cache-Control: public, immutable). Note:immutablecombined with a 1-hourexpiresis slightly contradictory (immutable implies the content never changes at the same URL, but it does change when the ConfigMap updates). However, since the pod rolls on ConfigMap changes and the CSS URL has no content hash, this is practically fine -- the pod restart clears the old cache window.CSS review:
@media (min-width: 600px)restores desktop defaults. Solid pattern.revert !importantin the desktop media query to undo mobile overrides.revertis well-supported in modern browsers. This is clean..MuiDrawer-root,.MuiGrid-container,.MuiTableContainer-root, etc.). These are stable across MinIO Console versions since MinIO uses MUI with default class name generation. Acceptable fragility tradeoff for a CSS injection approach..MuiTableCell-root:nth-child(n+4) { display: none }) is aggressive but reasonable for mobile -- the desktop media query restores them.BLOCKERS
1. SCOPE CREEP: Unrelated file committed (BLOCKER)
The diff includes
docs/superpowers/specs/2026-04-10-westside-admin-design.md-- a 183-line design spec for westside-admin that has nothing to do with MinIO Console mobile CSS (#346). This file does not exist on main; it was introduced by this branch. This is a clear scope creep violation. It must be removed from this PR.2. NETWORK POLICY: Intra-namespace traffic blocked (BLOCKER)
The minio namespace network policy in
terraform/network-policies.tf(lines 106-131) usesdefault-deny-ingresswith an explicit allowlist. The allowlist includestailscale,postgres,woodpecker,monitoring,tofu-state,pal-e-mail, andwestside-contracts-- but NOT theminionamespace itself.The new
minio-console-proxypod needs to reachminio-console:9001within the same namespace. With default-deny and no self-namespace rule, this traffic is blocked.Compare to the harbor namespace (line 97) which explicitly allows
{ "kubernetes.io/metadata.name" = "harbor" }, and the woodpecker namespace (line 73) which allows{ "kubernetes.io/metadata.name" = "woodpecker" }.The fix: add
{ from = [{ namespaceSelector = { matchLabels = { "kubernetes.io/metadata.name" = "minio" } } }] }to the minio network policy ingress rules. Alternatively, use apodSelectorrule for more precise targeting, but the namespace-self pattern is consistent with how harbor and woodpecker handle it.Without this fix, the proxy will deploy but return 502 errors because it cannot reach the upstream MinIO Console.
NITS
CSS
immutable+ time-based expiry: TheCache-Control "public, immutable"header combined withexpires 1hsends mixed signals. Since the CSS URL has no content-hash suffix,immutableis technically incorrect (the content at/custom/mobile.csscan change). Consider droppingimmutableand keeping justexpires 1hwithpublic. Non-blocking because pod rollouts effectively reset this.Worker connections:
worker_connections 128is fine for a single-user proxy, but the default1024would also be fine and is more conventional. Non-blocking.Liveness probe path: Probing
/custom/mobile.cssverifies the static file serving works but does not verify the proxy upstream is reachable. Ifminio-console:9001goes down, the proxy pod will still pass its health checks. Consider adding a separate readiness probe that hits/(which proxies to MinIO Console) with an expected 200/302, or accept that the probe is only testing nginx itself. Non-blocking.SOP COMPLIANCE
346-minio-mobile-cssfollows{issue-number}-{kebab-case-purpose}docs/superpowers/specs/2026-04-10-westside-admin-design.mdis unrelated scope creep (see BLOCKER #1)PROCESS OBSERVATIONS
tofu applytest, which is still unchecked in the Test Plan. The PR should not merge until apply is verified.VERDICT: NOT APPROVED
Two blockers must be resolved:
docs/superpowers/specs/2026-04-10-westside-admin-design.mdfrom this PR (scope creep).terraform/network-policies.tf, or the proxy will get 502s on every request to MinIO Console.PR #350 Review (Re-review)
DOMAIN REVIEW
Tech stack: Terraform/k8s (OpenTofu HCL managing Kubernetes resources via the Terraform provider).
Terraform/k8s checklist:
/custom/mobile.css:8080-- confirms nginx is serving the CSS mount.nginx:1.27-alpine-- pinned to minor version, acceptable for infra sidecar.depends_on = [helm_release.minio]-- ensures ordering.minio-console:9001within the same namespace.minio-console:9001tominio-console-proxy:80-- traffic now routes through the CSS-injecting proxy.Nginx configuration quality:
proxy_set_header Accept-Encoding ""correctly disables upstream compression sosub_filtercan operate on the response body.Upgrade,Connection) passed through for real-time Console updates.sub_filter_once onandsub_filter_types text/htmlcorrectly scoped -- only injects into the first</head>occurrence in HTML responses./custom/with 1h cache + immutable header -- appropriate for versioned content (rollout = new pod = new cache).CSS quality:
@media (min-width: 600px)restores defaults withrevert !important.!importantoverrides are necessary here since we cannot control the application's CSS specificity.BLOCKERS
None. Both previously identified issues have been resolved:
docs/superpowers/specs/2026-04-10-westside-admin-design.mdconfirmed absent from the branch (file does not exist).minio-console:9001within the minio namespace.NITS
The
minio_funnelingress hastailscale.com/funnel: "true"which exposes this to the public internet. The PR body mentions OIDC login flow works through the proxy -- this is acceptable since MinIO Console already requires authentication. No new auth surface introduced (proxy is transparent pass-through for auth headers).Consider adding a
security_contextblock to the nginx container withrun_as_non_root = trueandread_only_root_filesystem = truefor defense-in-depth. Non-blocking since the container only serves static CSS and proxies traffic.SOP COMPLIANCE
346-minio-mobile-cssfollows{issue-number}-{kebab-case-purpose}tofu planoutput not included in PR body (PR conventions say to include it for Terraform changes)The missing
tofu planoutput is a process gap but not a blocker -- the resources are straightforward (4 new + 1 update) and the plan can be verified during apply.PROCESS OBSERVATIONS
a29820c). Good turnaround.VERDICT: APPROVED