Update Environment to TimescaleDB

Environment/Service/Data/Database.cs

@@ -1,7 +1,7 @@
-using System.Reflection;
-using Dapper;
+using Dapper;
 using DbUp;
-using Microsoft.Data.SqlClient;
+using Npgsql;
+using System.Reflection;
 
 namespace ChrisKaczor.HomeMonitor.Environment.Service.Data;
 
@@ -9,12 +9,13 @@ public class Database(IConfiguration configuration)
 {
     private string GetConnectionString()
     {
-        var connectionStringBuilder = new SqlConnectionStringBuilder
+        var connectionStringBuilder = new NpgsqlConnectionStringBuilder
         {
-            DataSource = $"{configuration["Environment:Database:Host"]},{configuration["Environment:Database:Port"]}",
-            UserID = configuration["Environment:Database:User"],
+            Host = configuration["Environment:Database:Host"],
+            Port = configuration.GetValue<int>("Environment:Database:Port"),
+            Username = configuration["Environment:Database:User"],
             Password = configuration["Environment:Database:Password"],
-            InitialCatalog = configuration["Environment:Database:Name"],
+            Database = configuration["Environment:Database:Name"],
             TrustServerCertificate = bool.Parse(configuration["Environment:Database:TrustServerCertificate"] ?? "false")
         };
 
@@ -25,16 +26,16 @@ public class Database(IConfiguration configuration)
     {
         var connectionString = GetConnectionString();
 
-        DbUp.EnsureDatabase.For.SqlDatabase(connectionString);
+        DbUp.EnsureDatabase.For.PostgresqlDatabase(connectionString);
 
-        var upgradeEngine = DeployChanges.To.SqlDatabase(connectionString).WithScriptsEmbeddedInAssembly(Assembly.GetExecutingAssembly(), s => s.Contains(".Schema.")).LogToConsole().Build();
+        var upgradeEngine = DeployChanges.To.PostgresqlDatabase(connectionString).WithScriptsEmbeddedInAssembly(Assembly.GetExecutingAssembly(), s => s.Contains(".Schema.")).LogToConsole().Build();
 
         upgradeEngine.PerformUpgrade();
     }
 
-    private SqlConnection CreateConnection()
+    private NpgsqlConnection CreateConnection()
     {
-        var connection = new SqlConnection(GetConnectionString());
+        var connection = new NpgsqlConnection(GetConnectionString());
         connection.Open();
 
         return connection;

Environment/Service/Data/Queries/CreateReading.sql

@@ -1,25 +1,30 @@
-BEGIN TRANSACTION
-
-INSERT Reading
-  (Timestamp, Name, Model, Temperature, Pressure, Humidity, Luminance, GasResistance, ColorTemperature, AirQualityIndex)
-SELECT
-  @Timestamp,
-  @Name,
-  @Model,
-  @Temperature,
-  @Pressure,
-  @Humidity,
-  @Luminance,
-  @GasResistance,
-  @ColorTemperature,
-  @AirQualityIndex
-WHERE NOT EXISTS
-  (
-    SELECT
-      1
-    FROM
-      Reading WITH (UPDLOCK, SERIALIZABLE)
-    WHERE Timestamp = @Timestamp AND Name = @Name AND Model = @Model
-  )
-
-COMMIT TRANSACTION
+INSERT INTO 
+    reading 
+    (
+        time, 
+        name, 
+        model, 
+        temperature, 
+        pressure, 
+        humidity, 
+        luminance, 
+        gas_resistance, 
+        color_temperature, 
+        air_quality_index
+    )
+VALUES 
+    (
+        @Timestamp, 
+        @Name, 
+        @Model, 
+        @Temperature, 
+        @Pressure, 
+        @Humidity, 
+        @Luminance, 
+        @GasResistance, 
+        @ColorTemperature, 
+        @AirQualityIndex
+    ) 
+ON CONFLICT 
+    ON CONSTRAINT reading_pk 
+        DO NOTHING

Environment/Service/Data/Schema/1-Initial Schema.sql

@@ -1,14 +1,17 @@
-CREATE TABLE Reading
-(
-  Timestamp        datetimeoffset NOT NULL,
-  Name             nvarchar(50)   NOT NULL,
-  Model            nvarchar(50)   NOT NULL,
-  Temperature      decimal(5, 2)  NOT NULL,
-  Pressure         decimal(6, 2)  NOT NULL,
-  Humidity         decimal(5, 2)  NOT NULL,
-  Luminance        int            NOT NULL,
-  GasResistance    int            NOT NULL,
-  ColorTemperature int            NOT NULL,
-  AirQualityIndex  decimal(4, 1)  NOT NULL,
-  CONSTRAINT reading_pk PRIMARY KEY (Timestamp, Name, Model)
-);
+CREATE TABLE
+    reading (
+        time timestamptz NOT NULL,
+        name text NOT NULL,
+        model text NOT NULL,
+        temperature DECIMAL NOT NULL,
+        pressure DECIMAL NOT NULL,
+        humidity DECIMAL NOT NULL,
+        luminance INT NOT NULL,
+        gas_resistance INT NOT NULL,
+        color_temperature INT NOT NULL,
+        air_quality_index DECIMAL NOT NULL,
+        CONSTRAINT reading_pk PRIMARY KEY (time, name, model)
+    );
+
+SELECT
+    create_hypertable('reading', by_range('time'));

Environment/Service/MessageHandler.cs

@@ -14,7 +14,7 @@ public class MessageHandler : IHostedService
 
     private readonly MqttFactory _mqttFactory;
     private readonly string _topic;
-    private readonly HubConnection _hubConnection;
+    private readonly HubConnection? _hubConnection;
 
     public MessageHandler(IConfiguration configuration, Database database)
     {
@@ -33,12 +33,16 @@ public class MessageHandler : IHostedService
 
         _mqttClient.ApplicationMessageReceivedAsync += OnApplicationMessageReceivedAsync;
 
-        _hubConnection = new HubConnectionBuilder().WithUrl(configuration["Environment:Hub:Url"] ?? string.Empty).Build();
+        var hubUrl = configuration["Environment:Hub:Url"];
+
+        if (!string.IsNullOrEmpty(hubUrl))
+            _hubConnection = new HubConnectionBuilder().WithUrl(hubUrl).Build();
     }
 
     public async Task StartAsync(CancellationToken cancellationToken)
     {
-        await _hubConnection.StartAsync(cancellationToken);
+        if (_hubConnection != null)
+            await _hubConnection.StartAsync(cancellationToken);
 
         var mqttClientOptions = new MqttClientOptionsBuilder().WithTcpServer(_configuration["Mqtt:Server"]).Build();
         await _mqttClient.ConnectAsync(mqttClientOptions, cancellationToken);
@@ -51,7 +55,8 @@ public class MessageHandler : IHostedService
     {
         await _mqttClient.DisconnectAsync(new MqttClientDisconnectOptionsBuilder().Build(), cancellationToken);
 
-        await _hubConnection.StopAsync(cancellationToken);
+        if (_hubConnection != null)
+            await _hubConnection.StopAsync(cancellationToken);
     }
 
     private async Task OnApplicationMessageReceivedAsync(MqttApplicationMessageReceivedEventArgs arg)
@@ -75,6 +80,9 @@ public class MessageHandler : IHostedService
     {
         try
         {
+            if (_hubConnection == null)
+                return;
+
             if (_hubConnection.State == HubConnectionState.Disconnected)
                 await _hubConnection.StartAsync();
 

Environment/Service/Service.csproj

@@ -20,9 +20,9 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="ChrisKaczor.Common.OpenTelemetry" Version="1.0.1" />
+    <PackageReference Include="ChrisKaczor.Common.OpenTelemetry" Version="1.0.2" />
     <PackageReference Include="Dapper" Version="2.1.28" />
-    <PackageReference Include="dbup-sqlserver" Version="5.0.37" />
+    <PackageReference Include="dbup-postgresql" Version="5.0.40" />
     <PackageReference Include="JetBrains.Annotations" Version="2023.3.0" />
     <PackageReference Include="Microsoft.AspNetCore.SignalR.Client" Version="8.0.1" />
     <PackageReference Include="MQTTnet.AspNetCore" Version="4.3.3.952" />

Environment/Service/appsettings.json

@@ -15,9 +15,9 @@
             "Host": "",
             "User": "",
             "Password": "",
-            "Name": "Environment",
+            "Name": "environment",
             "TrustServerCertificate": true,
-            "Port": 1435
+            "Port": 5432
         },
         "Hub": {
             "Url": "http://hub-server/environment"

Environment/Service/deploy/manifest.yaml

@@ -19,27 +19,31 @@ spec:
     spec:
       containers:
       - name: environment-database
-        image: mcr.microsoft.com/mssql/server
-        terminationMessagePath: "/dev/termination-log"
-        terminationMessagePolicy: File
+        image: timescale/timescaledb:latest-pg16
         imagePullPolicy: IfNotPresent
         env:
-        - name: SA_PASSWORD
+        - name: POSTGRES_USER
+          valueFrom:
+            secretKeyRef:
+              name: environment-database-credentials
+              key: username
+        - name: POSTGRES_PASSWORD
           valueFrom:
             secretKeyRef:
               name: environment-database-credentials
               key: password
-        - name: ACCEPT_EULA
-          value: "Y"
-        - name: MSSQL_PID
-          value: Express
-        - name: MSSQL_TCP_PORT
-          value: "1435"
-        - name: TZ
-          value: America/New_York
+        - name: POSTGRES_DB
+          value: environment
         volumeMounts:
           - name: data
-            mountPath: /var/opt/mssql       
+            mountPath: /var/lib/postgresql/data
+        resources:
+          limits:
+            cpu: 1000m
+            memory: 1Gi
+          requests:
+            cpu: 500m
+            memory: 512Mi
       restartPolicy: Always
       terminationGracePeriodSeconds: 30
       dnsPolicy: ClusterFirst
@@ -63,7 +67,7 @@ metadata:
 spec:
   ports:
   - name: client
-    port: 1435
+    port: 5432
   selector:
     app: environment-database
   type: LoadBalancer
@@ -108,6 +112,13 @@ spec:
               key: password    
         - name: Environment__Hub__Url
           value: http://hub-service/environment
+        resources:
+          limits:
+            cpu: 1
+            memory: 1Gi
+          requests:
+            cpu: 500m
+            memory: 512Mi
       restartPolicy: Always
       terminationGracePeriodSeconds: 30
       dnsPolicy: ClusterFirst