Support flatcar in aws

Makefile

@@ -33,7 +33,7 @@ IMAGE_TAG = \
 		$(shell echo $$(git rev-parse HEAD && if [[ -n $$(git status --porcelain) ]]; then echo '-dirty'; fi)|tr -d ' ')
 IMAGE_NAME = $(REGISTRY)/$(REGISTRY_NAMESPACE)/machine-controller:$(IMAGE_TAG)
 
-OS = centos coreos ubuntu sles rhel
+OS = centos coreos ubuntu sles rhel flatcar
 USERDATA_BIN = $(patsubst %, machine-controller-userdata-%, $(OS))
 
 .PHONY: all

cmd/userdata/flatcar/main.go

@@ -0,0 +1,47 @@
+/*
+Copyright 2019 The Machine Controller Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+//
+// UserData plugin for flatcar.
+//
+
+package main
+
+import (
+	"flag"
+
+	"k8s.io/klog"
+
+	"github.com/kubermatic/machine-controller/pkg/userdata/convert"
+	"github.com/kubermatic/machine-controller/pkg/userdata/flatcar"
+	userdataplugin "github.com/kubermatic/machine-controller/pkg/userdata/plugin"
+)
+
+func main() {
+	// Parse flags.
+	var debug bool
+
+	flag.BoolVar(&debug, "debug", false, "Switch for enabling the plugin debugging")
+	flag.Parse()
+
+	// Instantiate provider and start plugin.
+	var provider = &flatcar.Provider{}
+	var p = userdataplugin.New(convert.NewIgnition(provider), debug)
+
+	if err := p.Run(); err != nil {
+		klog.Fatalf("error running flatcar plugin: %v", err)
+	}
+}

pkg/cloudprovider/provider/aws/provider.go

@@ -118,6 +118,12 @@ var (
 			// The AWS marketplace ID from RedHat
 			owner: "309956199498",
 		},
+		providerconfigtypes.OperatingSystemFlatcar: {
+			// Be as precise as possible - otherwise we might get a nightly dev build
+			description: "Flatcar Container Linux stable 2345.3.1 (HVM)",
+			// The AWS marketplace ID from AWS
+			owner: "075585003325",
+		},
 	}
 
 	// cacheLock protects concurrent cache misses against a single key. This usually happens when multiple machines get created simultaneously
@@ -236,6 +242,8 @@ func getDefaultRootDevicePath(os providerconfigtypes.OperatingSystem) (string, e
 		return rootDevicePathCoreOSSLES, nil
 	case providerconfigtypes.OperatingSystemRHEL:
 		return rootDevicePathUbuntuCentOSRHEL, nil
+	case providerconfigtypes.OperatingSystemFlatcar:
+		return rootDevicePathCoreOSSLES, nil
 	}
 
 	return "", fmt.Errorf("no default root path found for %s operating system", os)
@@ -488,8 +496,9 @@ func (p *provider) Create(machine *v1alpha1.Machine, data *cloudprovidertypes.Pr
 		}
 	}
 
-	if pc.OperatingSystem != providerconfigtypes.OperatingSystemCoreos {
-		// Gzip the userdata in case we don't use CoreOS.
+	if pc.OperatingSystem != providerconfigtypes.OperatingSystemCoreos &&
+		pc.OperatingSystem != providerconfigtypes.OperatingSystemFlatcar {
+		// Gzip the userdata in case we don't use CoreOS and Flatcar
 		userdata, err = convert.GzipString(userdata)
 		if err != nil {
 			return nil, fmt.Errorf("failed to gzip the userdata")

pkg/providerconfig/types/types.go

@@ -33,11 +33,12 @@ import (
 type OperatingSystem string
 
 const (
-	OperatingSystemCoreos OperatingSystem = "coreos"
-	OperatingSystemUbuntu OperatingSystem = "ubuntu"
-	OperatingSystemCentOS OperatingSystem = "centos"
-	OperatingSystemSLES   OperatingSystem = "sles"
-	OperatingSystemRHEL   OperatingSystem = "rhel"
+	OperatingSystemCoreos  OperatingSystem = "coreos"
+	OperatingSystemUbuntu  OperatingSystem = "ubuntu"
+	OperatingSystemCentOS  OperatingSystem = "centos"
+	OperatingSystemSLES    OperatingSystem = "sles"
+	OperatingSystemRHEL    OperatingSystem = "rhel"
+	OperatingSystemFlatcar OperatingSystem = "flatcar"
 )
 
 type CloudProvider string
@@ -67,6 +68,7 @@ var (
 		OperatingSystemCentOS,
 		OperatingSystemSLES,
 		OperatingSystemRHEL,
+		OperatingSystemFlatcar,
 	}
 
 	// AllCloudProviders is a slice containing all supported cloud providers.

pkg/userdata/flatcar/flatcar.go

@@ -0,0 +1,54 @@
+/*
+Copyright 2019 The Machine Controller Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flatcar
+
+import (
+	"encoding/json"
+
+	"k8s.io/apimachinery/pkg/runtime"
+)
+
+// Config contains specific configuration for Flatcar.
+type Config struct {
+	DisableAutoUpdate   bool `json:"disableAutoUpdate"`
+	DisableLocksmithD   bool `json:"disableLocksmithD"`
+	DisableUpdateEngine bool `json:"disableUpdateEngine"`
+}
+
+// LoadConfig retrieves the Flatcar configuration from raw data.
+func LoadConfig(r runtime.RawExtension) (*Config, error) {
+	cfg := Config{}
+	if len(r.Raw) == 0 {
+		return &cfg, nil
+	}
+	if err := json.Unmarshal(r.Raw, &cfg); err != nil {
+		return nil, err
+	}
+	return &cfg, nil
+}
+
+// Spec return the configuration as raw data.
+func (cfg *Config) Spec() (*runtime.RawExtension, error) {
+	ext := &runtime.RawExtension{}
+	b, err := json.Marshal(cfg)
+	if err != nil {
+		return nil, err
+	}
+
+	ext.Raw = b
+	return ext, nil
+}