feat: use Alpine AOT images, static SQLite and Podman host metrics [CI]

backend/tests/Monitor.Backend.Tests/HostTests.cs

@@ -21,6 +21,7 @@ public sealed class HostSamplerTests
         Assert.Equal((1000L, 5000L), HostSampler.ParseNetwork(Dev1));
         Assert.Equal(3600L, HostSampler.ParseUptime("3600.55 7000.1\n"));
         Assert.Null(HostSampler.ParseNetwork("nothing useful"));
+        Assert.Equal((1000L, 5000L), HostSampler.ParseNetwork(Dev1 + "podman0: 8888 1 0 0 0 0 0 0 9999 1 0 0 0 0 0 0\n"));
     }
 
     [Fact]
@@ -29,7 +30,7 @@ public sealed class HostSamplerTests
         var time = new Microsoft.Extensions.Time.Testing.FakeTimeProvider();
         string stat = Stat1;
         string dev = Dev1;
-        var sampler = new HostSampler(time, path => path switch { "/proc/stat" => stat, "/proc/net/dev" => dev, "/proc/uptime" => "100.0 1.0", _ => null }, () => (1000, 250));
+        var sampler = new HostSampler(time, path => path switch { "/proc/stat" => stat, "/proc/net/dev" => dev, "/proc/uptime" => "100.0 1.0", _ => null }, () => (1000, 250), procRoot: "/proc", sysRoot: "/sys");
         HostSnapshot first = sampler.Sample();
         Assert.Null(first.CpuPercent); // 第一次没有基线
         Assert.Null(first.NetRxBps);
@@ -45,6 +46,54 @@ public sealed class HostSamplerTests
         Assert.Equal(2000, second.NetTxBps);
         Assert.Equal(3000, second.NetRxTotal);
     }
+
+    [Fact]
+    public void Sample_UsesMountedHostProcAndSys_InsteadOfContainerPaths()
+    {
+        var reads = new List<string>();
+        var sampler = new HostSampler(TimeProvider.System, path =>
+        {
+            reads.Add(path);
+            return path switch
+            {
+                "/host/proc/stat" => Stat1,
+                "/host/proc/meminfo" => "MemTotal: 8192 kB\nMemAvailable: 6144 kB\n",
+                "/host/proc/net/dev" => Dev1,
+                "/host/proc/uptime" => "3600.0 7000.0",
+                "/host/sys/class/net/eth0/speed" => "10000\n",
+                _ => throw new InvalidOperationException("unexpected container path: " + path),
+            };
+        }, () => (1000, 250), procRoot: "/host/proc", sysRoot: "/host/sys");
+
+        HostSnapshot snapshot = sampler.Sample();
+        Assert.Equal(8L * 1024 * 1024, snapshot.MemTotal);
+        Assert.Equal(1000, snapshot.NetRxTotal);
+        Assert.Equal(10000, snapshot.NetLinkMbps);
+        Assert.Equal(3600, snapshot.UptimeSeconds);
+        Assert.DoesNotContain(reads, path => path.StartsWith("/proc/", StringComparison.Ordinal));
+        Assert.DoesNotContain(reads, path => path.Contains("docker0", StringComparison.Ordinal) || path.Contains("/lo/", StringComparison.Ordinal));
+    }
+
+    [Theory]
+    [InlineData(null)]
+    [InlineData("-1")]
+    [InlineData("0")]
+    [InlineData("not supported")]
+    public void Sample_DoesNotInventLinkSpeedOrContainerDisk_WhenHostDataIsUnavailable(string? speed)
+    {
+        var sampler = new HostSampler(TimeProvider.System,
+            path => path.EndsWith("net/dev", StringComparison.Ordinal) ? Dev1 : path.EndsWith("/speed", StringComparison.Ordinal) ? speed : null,
+            procRoot: "/host/proc", sysRoot: "/host/sys", diskRoot: Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString("N")));
+
+        HostSnapshot snapshot = sampler.Sample();
+        Assert.Null(snapshot.NetLinkMbps);
+        Assert.Null(snapshot.DiskTotal);
+        Assert.Null(snapshot.DiskUsed);
+        if (OperatingSystem.IsLinux())
+        {
+            Assert.Null(snapshot.UptimeSeconds);
+        }
+    }
 }
 
 [Collection("backend")]
@@ -61,6 +110,7 @@ public sealed class HostStatusTests
     {
         CpuPercent = cpu, MemUsed = 2L << 30, MemTotal = 8L << 30, DiskUsed = 10L << 30, DiskTotal = 40L << 30,
         NetRxTotal = 600L << 30, NetTxTotal = 180L << 30, NetRxBps = 2500, NetTxBps = 4800, UptimeSeconds = 3_000_000,
+        NetLinkMbps = 1000,
     };
 
     [Fact]
@@ -81,6 +131,7 @@ public sealed class HostStatusTests
         JsonNode item = list["items"]!.AsArray().Single(i => i!["agent_id"]!.GetValue<string>() == id)!;
         Assert.False(item["stale"]!.GetValue<bool>());
         Assert.Equal(40L << 30, item["host"]!["disk_total"]!.GetValue<long>());
+        Assert.Equal(1000, item["host"]!["net_link_mbps"]!.GetValue<long>());
 
         // 展示页能拿到的只有汇总数字：整份响应里没有型号、主机名、地址之类的字段
         string text = list.ToJsonString();