fix(services): сразу возвращать IP в DNS после первой успешной пробы

Co-authored-by: Cursor <[email protected]>

apps/api/test/lb-reconcile.test.ts

@@ -70,6 +70,18 @@ describe("selectActiveIpsByMode", () => {
     expect(selectActiveIpsByMode(config, rows)).toEqual(["1.1.1.1"]);
   });
 
+  it("failover returns recovering unknown primary immediately", () => {
+    const config: LbTargetConfig = {
+      lb_mode: "failover",
+      health_check_enabled: true,
+    };
+    const rows = [
+      row("1.1.1.1", { priority: 1, health: "unknown" }),
+      row("2.2.2.2", { priority: 2, health: "up" }),
+    ];
+    expect(selectActiveIpsByMode(config, rows)).toEqual(["1.1.1.1"]);
+  });
+
   it("failover falls back to min-priority ip among all when none healthy", () => {
     const config: LbTargetConfig = {
       lb_mode: "failover",
@@ -105,6 +117,17 @@ describe("selectActiveIpsByMode", () => {
     ).toEqual(["1.1.1.1"]);
   });
 
+  it("weighted includes recovering unknown in the cycle", () => {
+    const rows = [
+      row("1.1.1.1", { weight: 1, health: "up" }),
+      row("2.2.2.2", { weight: 3, health: "unknown" }),
+    ];
+    expect(selectActiveIpsByMode(weightedConfig, rows, 0)).toEqual(["1.1.1.1"]);
+    expect(
+      selectActiveIpsByMode(weightedConfig, rows, WEIGHTED_SLOT_MS),
+    ).toEqual(["2.2.2.2"]);
+  });
+
   it("weighted with one ip always returns that ip", () => {
     expect(
       selectActiveIpsByMode(weightedConfig, [row("1.1.1.1", { weight: 5 })], 0),
@@ -126,7 +149,7 @@ describe("selectActiveIpsByMode", () => {
     expect(selectActiveIpsByMode(weightedConfig, [], 0)).toEqual([]);
   });
 
-  it("round_robin excludes unknown when another ip is up", () => {
+  it("round_robin puts recovering unknown back with live ips", () => {
     const config: LbTargetConfig = {
       lb_mode: "round_robin",
       health_check_enabled: true,
@@ -135,7 +158,25 @@ describe("selectActiveIpsByMode", () => {
       row("1.1.1.1", { health: "up" }),
       row("2.2.2.2", { health: "unknown" }),
     ];
-    expect(selectActiveIpsByMode(config, rows)).toEqual(["1.1.1.1"]);
+    expect(selectActiveIpsByMode(config, rows).sort()).toEqual([
+      "1.1.1.1",
+      "2.2.2.2",
+    ]);
+  });
+
+  it("round_robin keeps degraded in the pool with live ips", () => {
+    const config: LbTargetConfig = {
+      lb_mode: "round_robin",
+      health_check_enabled: true,
+    };
+    const rows = [
+      row("1.1.1.1", { health: "up" }),
+      row("2.2.2.2", { health: "degraded" }),
+    ];
+    expect(selectActiveIpsByMode(config, rows).sort()).toEqual([
+      "1.1.1.1",
+      "2.2.2.2",
+    ]);
   });
 
   it("returns empty array for no rows", () => {