diff --git a/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/ubuntu/install/base/Install.kt b/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/ubuntu/install/base/Install.kt
index 69dfa78..a831aea 100644
--- a/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/ubuntu/install/base/Install.kt
+++ b/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/ubuntu/install/base/Install.kt
@@ -13,6 +13,7 @@ private var aptInit = false
  * @param ignoreAlreadyInstalled if true, then for an already installed package no action will be taken,
  * if "ignoreAlreadyInstalled" is false, then installation is always attempted, which normally results in an upgrade if package wa already installed
  */
+@Suppress("UNUSED_PARAMETER")  // ignoreAlreadyInstalled is added for external usage
 fun Prov.aptInstall(packages: String, ignoreAlreadyInstalled: Boolean = true): ProvResult = taskWithResult {
     val packageList = packages.split(" ")
     val allInstalled: Boolean = packageList.map { isPackageInstalled(it) }.fold(true, { a, b -> a && b })
@@ -41,6 +42,7 @@ fun Prov.aptInstall(packages: String, ignoreAlreadyInstalled: Boolean = true): P
  *
  * @param packages the packages to be installed, packages must be separated by space if there are more than one
  */
+@Suppress("unused")   // api - for external usage
 fun Prov.snapInstall(packages: String, classic: Boolean = false): ProvResult = task {
     val packageList = packages.split(" ")
     for (pkg in packageList) {
diff --git a/src/main/kotlin/org/domaindrivenarchitecture/provs/server/domain/k3s/K3sService.kt b/src/main/kotlin/org/domaindrivenarchitecture/provs/server/domain/k3s/K3sService.kt
index 92fff75..5f5b1c1 100644
--- a/src/main/kotlin/org/domaindrivenarchitecture/provs/server/domain/k3s/K3sService.kt
+++ b/src/main/kotlin/org/domaindrivenarchitecture/provs/server/domain/k3s/K3sService.kt
@@ -25,7 +25,7 @@ fun Prov.provisionK3s(cli: K3sCliCommand) = task {
 /**
  * Installs a k3s server.
  */
-fun Prov.provisionK3s(k3sConfig: K3sConfig, grafanaConfigResolved: GrafanaAgentConfigResolved?, applicationFileName: ApplicationFileName?) = task {
+fun Prov.provisionK3s(k3sConfig: K3sConfig, grafanaConfigResolved: GrafanaAgentConfigResolved? = null, applicationFileName: ApplicationFileName? = null) = task {
     provisionNetwork(k3sConfig)
     if (k3sConfig.reprovision && testConfigExists()) {
         deprovisionK3sInfra()
diff --git a/src/main/resources/org/domaindrivenarchitecture/provs/server/infrastructure/grafana/node-exporter-daemon-set.yaml b/src/main/resources/org/domaindrivenarchitecture/provs/server/infrastructure/grafana/node-exporter-daemon-set.yaml
index 4ddbbf0..5cd3d9f 100644
--- a/src/main/resources/org/domaindrivenarchitecture/provs/server/infrastructure/grafana/node-exporter-daemon-set.yaml
+++ b/src/main/resources/org/domaindrivenarchitecture/provs/server/infrastructure/grafana/node-exporter-daemon-set.yaml
@@ -47,7 +47,7 @@ spec:
             - --collector.filesystem.ignored-mount-points=^/(dev|proc|sys|var/lib/docker/.+|var/lib/kubelet/pods/.+)($|/)
             - --collector.netclass.ignored-devices=^(veth.*)$
           name: node-exporter
-          image: prom/node-exporter
+          image: prom/node-exporter:v1.3.1
           ports:
             - containerPort: 9100
               protocol: TCP