Performance: fetch all docker container statuses in one request (#7092)

Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>
2026-09-29 15:31:16 -07:00 · 2026-09-05 15:17:52 +00:00
parent df34927198
commit 438788240b
11 changed files with 617 additions and 365 deletions
@@ -60,6 +60,46 @@ export async function servicesFromConfig() {
  return parseServicesToGroups(services);
 }

+function flattenServices(groups, services = []) {
+  groups.forEach((group) => {
+    (group.services ?? []).forEach((service) => services.push(service));
+    flattenServices(group.groups ?? [], services);
+  });
+  return services;
+}
+
+function dockerWidgets(service) {
+  const widgets = service.widget ? [service.widget, ...(service.widgets ?? [])] : (service.widgets ?? []);
+  return widgets.filter((widget) => widget?.type === "docker");
+}
+
+export async function containersFromConfig(server) {
+  const target = server || "";
+  const services = flattenServices(await servicesFromConfig());
+  // services and docker widgets both carry container + server
+  const refs = services.flatMap((service) => [service, ...dockerWidgets(service)]);
+  const matching = refs.filter((ref) => ref.container && (ref.server || "") === target);
+
+  return new Set(matching.map((ref) => ref.container));
+}
+
+// homepage.foo -> foo, homepage.instance.<this instance>.foo -> foo, another instance -> null
+export function homepageLabelValue(label, instanceName) {
+  if (!label.startsWith("homepage.")) return null;
+
+  const value = label.replace("homepage.", "");
+  if (!value.startsWith("instance.")) return value;
+  if (instanceName && value.startsWith(`instance.${instanceName}.`)) {
+    return value.replace(`instance.${instanceName}.`, "");
+  }
+
+  return null;
+}
+
+export function hasHomepageLabels(labels, instanceName) {
+  return Object.keys(labels ?? {}).some((label) => homepageLabelValue(label, instanceName) !== null);
+}
+
 export async function servicesFromDocker() {
  checkAndCopyConfig("docker.yaml");

@@ -95,29 +135,23 @@ export async function servicesFromDocker() {
          const containerLabels = isSwarm ? shvl.get(container, "Spec.Labels") : container.Labels;
          const containerName = isSwarm ? shvl.get(container, "Spec.Name") : container.Names[0];

-          Object.keys(containerLabels).forEach((label) => {
-            if (label.startsWith("homepage.")) {
-              let value = label.replace("homepage.", "");
-              if (instanceName && value.startsWith(`instance.${instanceName}.`)) {
-                value = value.replace(`instance.${instanceName}.`, "");
-              } else if (value.startsWith("instance.")) {
-                return;
-              }
+          Object.keys(containerLabels ?? {}).forEach((label) => {
+            const value = homepageLabelValue(label, instanceName);
+            if (value === null) return;

-              if (!constructedService) {
-                constructedService = {
-                  container: containerName.replace(/^\//, ""),
-                  server: serverName,
-                  weight: 0,
-                  type: "service",
-                };
-              }
-              let substitutedVal = substituteEnvironmentVars(containerLabels[label]);
-              if (value === "widget.version" || /^widgets\[\d+\]\.version$/.test(value)) {
-                substitutedVal = parseVersionForUrl(substitutedVal);
-              }
-              shvl.set(constructedService, value, substitutedVal);
+            if (!constructedService) {
+              constructedService = {
+                container: containerName.replace(/^\//, ""),
+                server: serverName,
+                weight: 0,
+                type: "service",
+              };
            }
+            let substitutedVal = substituteEnvironmentVars(containerLabels[label]);
+            if (value === "widget.version" || /^widgets\[\d+\]\.version$/.test(value)) {
+              substitutedVal = parseVersionForUrl(substitutedVal);
+            }
+            shvl.set(constructedService, value, substitutedVal);
          });

          if (constructedService && (!constructedService.name || !constructedService.group)) {