add grafana only option

src/main/kotlin/org/domaindrivenarchitecture/provs/configuration/domain/CliTargetCommand.kt

@@ -9,7 +9,7 @@ private const val USER_HOST_DELIMITER = "@"
 private const val USER_PW_DELIMITER = ":"
 
 
-class TargetCliCommand(
+data class TargetCliCommand(
     val target: String,
     val passwordInteractive: Boolean = false
 ) {

src/main/kotlin/org/domaindrivenarchitecture/provs/server/application/CliArgumentsParser.kt

@@ -9,6 +9,7 @@ import org.domaindrivenarchitecture.provs.server.domain.ServerCliCommand
 import org.domaindrivenarchitecture.provs.server.domain.ServerType
 import org.domaindrivenarchitecture.provs.server.domain.k3s.ApplicationFileName
 import org.domaindrivenarchitecture.provs.server.domain.k3s.K3sCliCommand
+import org.domaindrivenarchitecture.provs.server.domain.k3s.ServerSubmodule
 
 class CliArgumentsParser(name: String) : CliTargetParser(name) {
 
@@ -32,7 +33,8 @@ class CliArgumentsParser(name: String) : CliTargetParser(name) {
                     passwordInteractive
                 ),
                 module.configFileName,
-                module.applicationFileName
+                module.applicationFileName,
+                module.submodules
             )
             else -> return ServerCliCommand(
                 ServerType.valueOf(module.name.uppercase()),
@@ -49,6 +51,7 @@ class CliArgumentsParser(name: String) : CliTargetParser(name) {
         var parsed: Boolean = false
         var configFileName: ConfigFileName? = null
         var applicationFileName: ApplicationFileName? = null
+        var submodules: List<String>? = null
     }
 
     class K3s : ServerSubcommand("k3s", "the k3s module") {
@@ -64,10 +67,17 @@ class CliArgumentsParser(name: String) : CliTargetParser(name) {
             "a",
             "the filename containing the yaml a application deployment"
         )
+        val only by option(
+            ArgType.Choice<ServerSubmodule>(),
+            "only",
+            "o",
+            "provisions only parts ",
+        )
 
         override fun execute() {
             super.configFileName = cliConfigFileName?.let { ConfigFileName(it) }
             super.applicationFileName = cliApplicationFileName?.let { ApplicationFileName(it) }
+            super.submodules = if (only != null) listOf(only!!.name.lowercase()) else null
             super.parsed = true
         }
     }

src/main/kotlin/org/domaindrivenarchitecture/provs/server/domain/k3s/K3sCliCommand.kt

@@ -5,10 +5,13 @@ import org.domaindrivenarchitecture.provs.configuration.domain.TargetCliCommand
 import org.domaindrivenarchitecture.provs.server.domain.ServerCliCommand
 import org.domaindrivenarchitecture.provs.server.domain.ServerType
 
-class K3sCliCommand (
+class K3sCliCommand(
     serverType: ServerType,
     target: TargetCliCommand,
     configFileName: ConfigFileName?,
-    val applicationFileName: ApplicationFileName?) :
-    ServerCliCommand(serverType, target, configFileName) {
-}
+    val applicationFileName: ApplicationFileName?,
+    val submodules: List<String>? = null
+) :
+    ServerCliCommand(
+        serverType, target, configFileName
+    )

src/main/kotlin/org/domaindrivenarchitecture/provs/server/domain/k3s/K3sService.kt

@@ -4,34 +4,51 @@ import org.domaindrivenarchitecture.provs.framework.core.Prov
 import org.domaindrivenarchitecture.provs.server.domain.k8s_grafana_agent.GrafanaAgentConfigResolved
 import org.domaindrivenarchitecture.provs.server.domain.k8s_grafana_agent.provisionGrafanaAgent
 import org.domaindrivenarchitecture.provs.server.infrastructure.*
+import kotlin.system.exitProcess
 
 /**
  * Installs a k3s server.
  */
 fun Prov.provisionK3s(cli: K3sCliCommand) = task {
+
     val k3sConfig: K3sConfig = getK3sConfig(cli.configFileName)
     val grafanaConfigResolved: GrafanaAgentConfigResolved? = findK8sGrafanaConfig(cli.configFileName)?.resolveSecret()
 
-    provisionNetwork(k3sConfig)
-    if (k3sConfig.reprovision && testConfigExists()) {
-        deprovisionK3sInfra()
-    }
+    if (cli.submodules == null) {
+        provisionNetwork(k3sConfig)
+        if (k3sConfig.reprovision && testConfigExists()) {
+            deprovisionK3sInfra()
+        }
 
-    installK3s(k3sConfig)
+        installK3s(k3sConfig)
 
-    if (k3sConfig.certmanager != null) {
-        provisionK3sCertManager(k3sConfig.certmanager)
-    }
+        if (k3sConfig.certmanager != null) {
+            provisionK3sCertManager(k3sConfig.certmanager)
+        }
 
-    if (k3sConfig.echo == true) {
-        provisionK3sEcho(k3sConfig.fqdn, k3sConfig.certmanager?.letsencryptEndpoint)
-    }
+        if (k3sConfig.echo == true) {
+            provisionK3sEcho(k3sConfig.fqdn, k3sConfig.certmanager?.letsencryptEndpoint)
+        }
 
-    if (grafanaConfigResolved != null) {
-        provisionGrafanaAgent(grafanaConfigResolved)
+        if (grafanaConfigResolved != null) {
+            provisionGrafanaAgent(grafanaConfigResolved)
+        }
+
+        if (cli.applicationFileName != null) {
+            provisionK3sApplication(cli.applicationFileName)
+        }
+    } else {
+        provisionMeissaDesktopSubmodules(cli.submodules, grafanaConfigResolved)
     }
 
-    if (cli.applicationFileName != null) {
-        provisionK3sApplication(cli.applicationFileName)
+}
+
+private fun Prov.provisionMeissaDesktopSubmodules(submodules: List<String>, grafanaConfigResolved: GrafanaAgentConfigResolved?) = task {
+    if (submodules.contains(ServerSubmodule.GRAFANA.name.lowercase())) {
+        if (grafanaConfigResolved == null) {
+            println("ERROR: Could not find grafana config.")
+            exitProcess(7)
+        }
+        provisionGrafanaAgent(grafanaConfigResolved)
     }
 }

src/main/kotlin/org/domaindrivenarchitecture/provs/server/domain/k3s/ServerSubModule.kt

@@ -0,0 +1,5 @@
+package org.domaindrivenarchitecture.provs.server.domain.k3s
+
+enum class ServerSubmodule {
+    GRAFANA
+}

src/main/kotlin/org/domaindrivenarchitecture/provs/server/infrastructure/GrafanaAgentRepository.kt

@@ -1,5 +1,6 @@
 package org.domaindrivenarchitecture.provs.server.infrastructure
 
+import com.charleskorn.kaml.MissingRequiredPropertyException
 import org.domaindrivenarchitecture.provs.configuration.domain.ConfigFileName
 import org.domaindrivenarchitecture.provs.framework.core.readFromFile
 import org.domaindrivenarchitecture.provs.framework.core.toYaml
@@ -18,7 +19,11 @@ fun findK8sGrafanaConfig(fileName: ConfigFileName? = null): GrafanaAgentConfig?
 
     // create a default config
     return if (File(filePath).exists()) {
-        readFromFile(filePath).yamlToType<GrafanaAgentConfigHolder>().grafana
+        try {
+            readFromFile(filePath).yamlToType<GrafanaAgentConfigHolder>().grafana
+        } catch (e: MissingRequiredPropertyException) {
+            null
+        }
     } else {
         null
     }

src/test/kotlin/org/domaindrivenarchitecture/provs/server/application/CliArgumentParserTest.kt

@@ -1,8 +1,12 @@
 package org.domaindrivenarchitecture.provs.server.application
 
+import org.domaindrivenarchitecture.provs.configuration.domain.TargetCliCommand
 import org.domaindrivenarchitecture.provs.server.domain.ServerType
+import org.domaindrivenarchitecture.provs.server.domain.k3s.ApplicationFileName
+import org.domaindrivenarchitecture.provs.server.domain.k3s.K3sCliCommand
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Assertions.assertTrue
 import org.junit.jupiter.api.Test
-import org.junit.jupiter.api.Assertions.*
 
 internal class CliArgumentParserTest {
 
@@ -18,4 +22,34 @@ internal class CliArgumentParserTest {
         assertTrue(result.isValid())
         assertEquals(ServerType.K3S, result.serverType)
     }
+
+    @Test
+    fun test_parseServerArguments_are_valid_for_k3s_withOnly_grafana() {
+        // given
+        val parser = CliArgumentsParser("test")
+
+        // when
+        val result: K3sCliCommand = parser.parseCommand(args = arrayOf("k3s", "local", "-o", "grafana")) as K3sCliCommand
+
+        // then
+        assertTrue(result.isValid())
+        assertEquals(ServerType.K3S, result.serverType)
+        assertEquals(listOf("grafana"), result.submodules)
+        assertEquals(TargetCliCommand("local"), result.target)
+    }
+
+    @Test
+    fun test_parseServerArguments_are_valid_for_k3s_remote_with_application_yaml() {
+        // given
+        val parser = CliArgumentsParser("test")
+
+        // when
+        val result: K3sCliCommand = parser.parseCommand(args = arrayOf("k3s", "user@host.com", "-a", "app.yaml")) as K3sCliCommand
+
+        // then
+        assertTrue(result.isValid())
+        assertEquals(ServerType.K3S, result.serverType)
+        assertEquals(ApplicationFileName("app.yaml"), result.applicationFileName)
+        assertEquals(TargetCliCommand("user@host.com"), result.target)
+    }
 }