providers: add support for ionos cloud

Add support for IONOS Cloud

Add check to ignore cloud-config

docs/release-notes.md

@@ -13,6 +13,7 @@ nav_order: 9
 - Support partitioning disk with mounted partitions
 - Support Proxmox VE
 - Support gzipped Akamai user_data
+- Support IONOS Cloud
 
 ### Changes
 

docs/supported-platforms.md

@@ -20,6 +20,7 @@ Ignition is currently supported for the following platforms:
 * [Hetzner Cloud] (`hetzner`) - Ignition will read its configuration from the instance userdata. Cloud SSH keys are handled separately.
 * [Microsoft Hyper-V] (`hyperv`) - Ignition will read its configuration from the `ignition.config` key in pool 0 of the Hyper-V Data Exchange Service (KVP). Values are limited to approximately 1 KiB of text, so Ignition can also read and concatenate multiple keys named `ignition.config.0`, `ignition.config.1`, and so on.
 * [IBM Cloud] (`ibmcloud`) - Ignition will read its configuration from the instance userdata. Cloud SSH keys are handled separately.
+* [IONOS Cloud] (`ionoscloud`) - Ignition will read its configuration from the instance userdata. Cloud SSH keys are handled separately.
 * [KubeVirt] (`kubevirt`) - Ignition will read its configuration from the instance userdata via config drive. Cloud SSH keys are handled separately.
 * Bare Metal (`metal`) - Use the `ignition.config.url` kernel parameter to provide a URL to the configuration. The URL can use the `http://`, `https://`, `tftp://`, `s3://`, `arn:`, or `gs://` schemes to specify a remote config.
 * [Nutanix] (`nutanix`) - Ignition will read its configuration from the instance userdata via config drive. Cloud SSH keys are handled separately.
@@ -52,6 +53,7 @@ For most cloud providers, cloud SSH keys and custom network configuration are ha
 [Hetzner Cloud]: https://www.hetzner.com/cloud
 [Microsoft Hyper-V]: https://learn.microsoft.com/en-us/virtualization/hyper-v-on-windows/
 [IBM Cloud]: https://www.ibm.com/cloud/vpc
+[IONOS Cloud]: https://cloud.ionos.com/
 [KubeVirt]: https://kubevirt.io
 [Nutanix]: https://www.nutanix.com/products/ahv
 [OpenStack]: https://www.openstack.org/

internal/providers/ionoscloud/ionoscloud.go

@@ -0,0 +1,60 @@
+// Copyright 2019 Red Hat, Inc.
+//
+// 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.
+
+// The IONOSCloud provider fetches configurations from the userdata available in
+// the injected file /var/lib/cloud/seed/nocloud/user-data.
+// NOTE: This provider is still EXPERIMENTAL.
+
+package ionoscloud
+
+import (
+	"bytes"
+	"os"
+
+	"github.com/coreos/ignition/v2/config/v3_5_experimental/types"
+	"github.com/coreos/ignition/v2/internal/platform"
+	"github.com/coreos/ignition/v2/internal/providers/util"
+	"github.com/coreos/ignition/v2/internal/resource"
+
+	"github.com/coreos/vcontext/report"
+)
+
+const (
+	defaultFilename = "/var/lib/cloud/seed/nocloud/user-data"
+)
+
+func init() {
+	platform.Register(platform.Provider{
+		Name:  "ionoscloud",
+		Fetch: fetchConfig,
+	})
+}
+
+func fetchConfig(f *resource.Fetcher) (types.Config, report.Report, error) {
+	f.Logger.Info("using config file at %q", defaultFilename)
+
+	rawConfig, err := os.ReadFile(defaultFilename)
+	if err != nil {
+		f.Logger.Err("couldn't read config %q: %v", defaultFilename, err)
+		return types.Config{}, report.Report{}, err
+	}
+
+	header := []byte("#cloud-config\n")
+	if bytes.HasPrefix(rawConfig, header) {
+		f.Logger.Debug("config drive (%q) contains a cloud-config configuration, ignoring", defaultFilename)
+		return types.Config{}, report.Report{}, err
+	}
+
+	return util.ParseConfig(f.Logger, rawConfig)
+}

internal/register/providers.go

@@ -29,6 +29,7 @@ import (
 	_ "github.com/coreos/ignition/v2/internal/providers/hetzner"
 	_ "github.com/coreos/ignition/v2/internal/providers/hyperv"
 	_ "github.com/coreos/ignition/v2/internal/providers/ibmcloud"
+	_ "github.com/coreos/ignition/v2/internal/providers/ionoscloud"
 	_ "github.com/coreos/ignition/v2/internal/providers/kubevirt"
 	_ "github.com/coreos/ignition/v2/internal/providers/metal"
 	_ "github.com/coreos/ignition/v2/internal/providers/nutanix"