Add Redis Health Check

HealthChecks.sln

@@ -25,6 +25,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.AspNet.HealthChec
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SampleHealthChecker.AspNet", "samples\SampleHealthChecker.AspNet\SampleHealthChecker.AspNet.csproj", "{33FB5967-62C7-4230-B515-780EF63F748E}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.Extensions.HealthChecks.Redis", "src\Microsoft.Extensions.HealthChecks.Redis\Microsoft.Extensions.HealthChecks.Redis.csproj", "{B88C2B6F-991F-4217-84A0-28F0BEDBD993}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -63,6 +65,10 @@ Global
 		{33FB5967-62C7-4230-B515-780EF63F748E}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{33FB5967-62C7-4230-B515-780EF63F748E}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{33FB5967-62C7-4230-B515-780EF63F748E}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B88C2B6F-991F-4217-84A0-28F0BEDBD993}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B88C2B6F-991F-4217-84A0-28F0BEDBD993}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B88C2B6F-991F-4217-84A0-28F0BEDBD993}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B88C2B6F-991F-4217-84A0-28F0BEDBD993}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -76,5 +82,9 @@ Global
 		{13BE838A-200B-4A68-8F58-3EA3BE3A1A8A} = {F9BA869A-7D5F-420F-9505-2D881F7934A7}
 		{2AE82E1C-6CE1-4755-A332-FA359B7CCE72} = {F9BA869A-7D5F-420F-9505-2D881F7934A7}
 		{33FB5967-62C7-4230-B515-780EF63F748E} = {E05DCF88-F916-4B61-A5DC-A8344C9E2429}
+		{B88C2B6F-991F-4217-84A0-28F0BEDBD993} = {F9BA869A-7D5F-420F-9505-2D881F7934A7}
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {647884AE-0D3B-4A25-8303-1CEA1C2DD945}
 	EndGlobalSection
 EndGlobal

src/Microsoft.Extensions.HealthChecks.Redis/HealthCheckBuilderRedisExtensions.cs

@@ -0,0 +1,42 @@
+using System;
+using ServiceStack.Redis;
+using System.Linq;
+namespace Microsoft.Extensions.HealthChecks
+{
+    public static class HealthCheckBuilderRedisExtensions
+    {
+        public static HealthCheckBuilder AddRedisCheck(this HealthCheckBuilder builder, string name, string host, int port, string password = null)
+        {
+            Guard.ArgumentNotNull(nameof(builder), builder);
+            return AddRedisCheck(builder, name, builder.DefaultCacheDuration, host, port, password);
+        }
+
+
+        public static HealthCheckBuilder AddRedisCheck(this HealthCheckBuilder builder, string name, TimeSpan cacheDuration, string host, int port, string password = null)
+        {
+            builder.AddCheck($"RedisCheck({name})", () =>
+            {
+                try
+                {
+                    using (var client = new RedisClient(host, port, password))
+                    {
+                        var response = client.Info;
+
+                        if (response != null && response.Any())
+                        {
+                            return HealthCheckResult.Healthy($"RedisCheck({name}): Healthy");
+                        }
+                        return HealthCheckResult.Unhealthy($"RedisCheck({name}): Unhealthy");
+
+                    }
+                }
+                catch (Exception ex)
+                {
+                    return HealthCheckResult.Unhealthy($"RedisCheck({name}): Exception during check: {ex.GetType().FullName}");
+                }
+            }, cacheDuration);
+
+            return builder;
+        }
+    }
+}

src/Microsoft.Extensions.HealthChecks.Redis/Microsoft.Extensions.HealthChecks.Redis.csproj

@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp2.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Compile Include="..\common\Guard.cs" Link="Internal\Guard.cs" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="ServiceStack.Redis.Core" Version="5.1.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Microsoft.Extensions.HealthChecks\Microsoft.Extensions.HealthChecks.csproj" />
+  </ItemGroup>
+
+</Project>