[WIP] Add kustomize krm generator function

examples/kustomize-generator/krm.yaml

@@ -0,0 +1,23 @@
+apiVersion: pyrra.dev/v1alpha1
+kind: ServiceLevelObjective
+metadata:
+  name: pyrra-kubernetes-errors
+  namespace: monitoring
+  labels:
+    prometheus: k8s
+    role: alert-rules
+  annotations:
+    config.kubernetes.io/local-config: "true"
+    config.kubernetes.io/function: |
+      container:
+        image: ghcr.io/pyrra-dev/pyrra:v0.7.0
+spec:
+  target: "99"
+  window: 1w
+  description: The reconciles when reading Pyrra's CRDs and generating their corresponding PrometheusRule CRDs.
+  indicator:
+    ratio:
+      errors:
+        metric: controller_runtime_reconcile_total{controller="servicelevelobjective",result="error"}
+      total:
+        metric: controller_runtime_reconcile_total{controller="servicelevelobjective"}

examples/kustomize-generator/kustomization.yaml

@@ -0,0 +1,5 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+generators:
+  - krm.yaml

go.mod

@@ -1,8 +1,11 @@
 module github.com/pyrra-dev/pyrra
 
-go 1.20
+go 1.21
+
+toolchain go1.22.1
 
 require (
+	github.com/GoogleContainerTools/kpt-functions-sdk/go/fn v0.0.0-20230427202446-3255accc518d
 	github.com/alecthomas/kong v0.9.0
 	github.com/bufbuild/connect-go v1.10.0
 	github.com/dgraph-io/ristretto v0.1.1
@@ -28,13 +31,15 @@ require (
 )
 
 require (
+	github.com/GoogleContainerTools/kpt-functions-sdk/go/api v0.0.0-20220720212527-133180134b93 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/dennwc/varint v1.0.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/emicklei/go-restful/v3 v3.11.0 // indirect
 	github.com/evanphx/json-patch/v5 v5.8.0 // indirect
+	github.com/go-errors/errors v1.0.1 // indirect
 	github.com/go-logfmt/logfmt v0.6.0 // indirect
 	github.com/go-logr/logr v1.4.1 // indirect
 	github.com/go-logr/zapr v1.3.0 // indirect
@@ -57,13 +62,15 @@ require (
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/monochromegane/go-gitignore v0.0.0-20200626010858-205db1a8cc00 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/prometheus/client_model v0.5.0 // indirect
 	github.com/prometheus/procfs v0.12.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/xlab/treeprint v1.1.0 // indirect
 	go.uber.org/atomic v1.11.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	go.uber.org/zap v1.26.0 // indirect
@@ -83,5 +90,6 @@ require (
 	k8s.io/kube-openapi v0.0.0-20231010175941-2dd684a91f00 // indirect
 	k8s.io/utils v0.0.0-20240310230437-4693a0247e57 // indirect
 	sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect
+	sigs.k8s.io/kustomize/kyaml v0.13.7-0.20220418212550-9d5491c2e20c // indirect
 	sigs.k8s.io/structured-merge-diff/v4 v4.4.1 // indirect
 )