fix: strip unnecessary files from Flatcar's Ignition data to save space

Author: chewi

parts/linux/cloud-init/nodecustomdata.yml

@@ -176,7 +176,7 @@ write_files:
   owner: root
   content: !!binary |
     {{GetVariableProperty "cloudInitData" "packageUpdateTimerMariner"}}
-{{- else}}
+{{- else if not IsFlatcar }}
 - path: /opt/azure/containers/ubuntu-snapshot-update.sh
   permissions: "0544"
   encoding: gzip
@@ -313,12 +313,14 @@ write_files:
   content: !!binary |
     {{GetVariableProperty "cloudInitData" "ensureIMDSRestrictionScript"}}
 
+{{- if ShouldEnableCustomData }}
 - path: /opt/azure/containers/cloud-init-status-check.sh
   permissions: "0744"
   encoding: gzip
   owner: root
   content: !!binary |
     {{GetVariableProperty "cloudInitData" "cloudInitStatusCheckScript"}}
+{{- end }}
 
 - path: /opt/azure/containers/measure-tls-bootstrapping-latency.sh
   permissions: "0755"

pkg/agent/variables.go

@@ -77,6 +77,10 @@ func getCustomDataVariables(config *datamodel.NodeBootstrappingConfiguration) pa
 		}
 	}
 
+	if config.IsFlatcar() {
+		cloudInitData["provisionRedactCloudConfig"] = "" // Flatcar does not have cloud-init
+	}
+
 	if !cs.Properties.IsVHDDistroForAllNodes() {
 		cloudInitData["kmsSystemdService"] = getBase64EncodedGzippedCustomScript(kmsSystemdService, config)
 		cloudInitData["aptPreferences"] = getBase64EncodedGzippedCustomScript(aptPreferences, config)