Add helm-operator-mapper tool for migrating from helm to operator

charts/datadog/CHANGELOG.md

@@ -1,5 +1,9 @@
 # Datadog changelog
 
+## 3.74.7
+
+* Add yaml-mapper tool that converts a helm `values.yaml` to one compatible with Datadog Operator, to promote transitioning from helm charts to the Operator.
+
 ## 3.74.6
 
 * Fix error message for when System Probe is enabled on GKE Autopilot

charts/datadog/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: datadog
-version: 3.74.6
+version: 3.74.7
 appVersion: "7"
 description: Datadog Agent
 keywords:

tools/yaml-mapper/README.md

@@ -0,0 +1,46 @@
+# README.md
+
+## Purpose
+
+The purpose of this tool is to map a YAML file of a certain structure to another YAML file of a different structure. For instance, migrating a Helm chart values.yaml file to another values.yaml file after a significant chart update.
+
+## Motivation
+
+The motivation for creating this tool was to provide a way to support Datadog users who desire to switch from deploying the Datadog Agent using the `datadog` Helm chart to using the Datadog Operator controller. It is a potentially significant change that requires creating a new `DatadogAgent` custom resource specification. As a result, we are providing a way to map from a Helm chart values.yaml file to a `DatadogAgent` CRD spec, using a provided mapping.yaml file.
+
+## How to install
+
+```bash
+
+$ go build -o yaml-mapper .
+
+```
+
+## How to use
+
+If the desired conversion is between the `datadog` Helm chart and a `DatadogAgent` spec, use the provided `mapping_datadog_helm_to_datadogagent_crd.yaml` file as the mapping file. Otherwise, create your own using the following format:
+
+```
+source.key: destination.key
+```
+
+where both the key and value are period-delimited in lieu of nested/indented, as in a typical YAML file.
+
+Pass the source file and mapping file to the command:
+
+```bash
+$ ./yaml-mapper -sourceFile=source.yaml -mappingFile=mapping.yaml
+
+```
+
+The resulting file will be written to `destination.yaml`. To specify a destination file, use flag `-destFile=[filename.yaml]`.
+
+Content from a file can be optionally prepended to the output. To specify the prefix file, use flag `-prefixFile=[filename.yaml]`
+
+By default the output will also be printed to STDOUT; to disable this use the flag `-printOutput=false`.
+
+## Example usage (using provided files)
+
+```bash
+$ ./yaml-mapper -sourceFile=example_source.yaml -mappingFile=mapping_datadog_helm_to_datadogagent_crd.yaml -prefixFile=example_prefix.yaml
+```

tools/yaml-mapper/example_prefix.yaml

@@ -0,0 +1,5 @@
+apiVersion: datadoghq.com/v2alpha1
+kind: DatadogAgent
+metadata:
+  name: datadog
+  namespace: datadog

tools/yaml-mapper/example_source.yaml

@@ -0,0 +1,44 @@
+registry: "docker.io/datadog"
+datadog:
+  apiKey: "testapikey"
+  appKey: "testappkey"
+
+  logLevel: "debug"
+
+  kubeStateMetricsCore:
+    enabled: true
+  useHostPID: true
+
+  clusterChecks:
+    enabled: true
+    shareProcessNamespace: true
+
+  nodeLabelsAsTags:
+    beta.kubernetes.io/instance-type: aws-instance-type
+  podLabelsAsTags:
+    app: kube_app
+  podAnnotationsAsTags:
+    iam.amazonaws.com/role: kube_iamrole
+  namespaceLabelsAsTags:
+    env: environment
+  tags:
+    - "test:tag"
+  checksCardinality: low
+
+  kubelet:
+    tlsVerify: false
+
+  dogstatsd:
+    port: 1234
+    originDetection: true
+    useSocketVolume: true
+    useHostPort: false
+agents:
+  volumeMounts:
+    - name: example
+      mountPath: "this/is/a/volume/mount"
+      readOnly: true
+  volumes:
+      - hostPath:
+          path: "this/is/a/host/path"
+        name: example

tools/yaml-mapper/go.mod

@@ -0,0 +1,37 @@
+module github.com/DataDog/helm-charts
+
+go 1.22.7
+
+require (
+	github.com/Masterminds/semver/v3 v3.3.0 // indirect
+	github.com/cyphar/filepath-securejoin v0.3.1 // indirect
+	github.com/fxamacker/cbor/v2 v2.7.0 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/google/gofuzz v1.2.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/mitchellh/copystructure v1.2.0 // indirect
+	github.com/mitchellh/reflectwalk v1.0.2 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/x448/float16 v0.8.4 // indirect
+	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
+	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
+	github.com/xeipuuv/gojsonschema v1.2.0 // indirect
+	golang.org/x/net v0.26.0 // indirect
+	golang.org/x/sys v0.25.0 // indirect
+	golang.org/x/text v0.18.0 // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	helm.sh/helm/v3 v3.16.2 // indirect
+	k8s.io/api v0.31.1 // indirect
+	k8s.io/apiextensions-apiserver v0.31.1 // indirect
+	k8s.io/apimachinery v0.31.1 // indirect
+	k8s.io/client-go v0.31.1 // indirect
+	k8s.io/klog/v2 v2.130.1 // indirect
+	k8s.io/utils v0.0.0-20240711033017-18e509b52bc8 // indirect
+	sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect
+	sigs.k8s.io/structured-merge-diff/v4 v4.4.1 // indirect
+	sigs.k8s.io/yaml v1.4.0 // indirect
+)

tools/yaml-mapper/go.sum

@@ -0,0 +1,102 @@
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