Include namespace env var

CHANGELOG.md

@@ -1,6 +1,21 @@
 k8s-mutate-image-and-policy
 ====
 
+
+# Version v3.5.0 -- 2024.08.10
+
+## Added
+
+- New env var `INCLUDE_NAMESPACES` to explicitly include specific namespaces. Default to empty, meaning all the namespaces are included (backward compatible behavior)
+
+## Change
+
+- Golang version and dependencies bump
+
+## Fixed
+
+- Fix append imagePullSecret when some imagePullSecrets are already present
+
 # Version v3.4.0 -- 11.10.2023
 
 ## Enhancement

Dockerfile

@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM golang:1.20 as builder
+FROM --platform=$BUILDPLATFORM golang:1.22 as builder
 
 ARG TARGETOS
 ARG TARGETARCH

Makefile

@@ -1,4 +1,4 @@
-VERSION=v3.4.0
+VERSION=v3.5.0-rc2
 GOOS=linux
 GOCMD=go
 GOBUILD=$(GOCMD) build

admission_controller.go

@@ -56,6 +56,20 @@ func isExcludedNamespace(ns string, excludedNamespaces []string) bool {
 	return false
 }
 
+// isIncludedNamespace checks if the given namespace is a included via the configuration.
+// An empty includedNamespaces means all the namespaces are included.
+func isIncludedNamespace(ns string, includedNamespaces []string) bool {
+	if len(includedNamespaces) == 0 {
+		return true
+	}
+	for _, a := range includedNamespaces {
+		if a == ns {
+			return true
+		}
+	}
+	return false
+}
+
 // doServeAdmitFunc parses the HTTP request for an admission controller webhook, and -- in case of a well-formed
 // request -- delegates the admission control logic to the given admitFunc. The response body is then returned as raw
 // bytes.
@@ -109,12 +123,13 @@ func (wh *mutationWH) doServeAdmitFunc(w http.ResponseWriter, r *http.Request, a
 
 		var patchOps []patchOperation
 
-		// Apply the admit() function only for non-excluded namespaces. For objects excluded, return
-		// an empty set of patch operations.
-		if !isExcludedNamespace(admissionReviewReq.Request.Namespace, wh.excludedNamespaces) {
+		// Apply the admit() function only non-excluded and included (if not empty) namespaces.
+		// For objects excluded, return an empty set of patch operations.
+		if !isExcludedNamespace(admissionReviewReq.Request.Namespace, wh.excludedNamespaces) &&
+			isIncludedNamespace(admissionReviewReq.Request.Namespace, wh.includedNamespaces) {
 			patchOps, err = admit(admissionReviewReq.Request)
 		} else {
-			log.Debugf("Namespace is excluded")
+			log.Debugf("Namespace is not included or excluded")
 		}
 
 		if err != nil {

admission_controller_test.go

@@ -14,3 +14,12 @@ func TestIsExcludedNamespace(t *testing.T) {
 	assert.False(t, isExcludedNamespace("ns", []string{}))
 	assert.False(t, isExcludedNamespace("ns", nil))
 }
+
+func TestIsIncludedNamespace(t *testing.T) {
+	assert.False(t, isIncludedNamespace("a-namespace", []string{"kube-system", "kube-public"}))
+	assert.False(t, isIncludedNamespace("default", []string{"kube-system", "kube-public"}))
+	assert.True(t, isIncludedNamespace("kube-system", []string{"kube-system", "kube-public"}))
+	assert.True(t, isIncludedNamespace("kube-public", []string{"kube-system", "kube-public"}))
+	assert.True(t, isIncludedNamespace("ns", []string{}))
+	assert.True(t, isIncludedNamespace("ns", nil))
+}

go.mod

@@ -1,36 +1,38 @@
 module github.com/sqooba/k8s-mutate-image-and-policy
 
-go 1.20
+go 1.22.0
+
+toolchain go1.22.4
 
 require (
 	github.com/kelseyhightower/envconfig v1.4.0
 	github.com/sqooba/go-common v0.0.0-20230125131914-ef63c1e34f33
-	github.com/stretchr/testify v1.8.0
-	k8s.io/api v0.26.1
-	k8s.io/apimachinery v0.26.1
+	github.com/stretchr/testify v1.9.0
+	k8s.io/api v0.30.3
+	k8s.io/apimachinery v0.30.3
 )
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/docker/distribution v2.7.1+incompatible // indirect
-	github.com/go-logr/logr v1.2.3 // indirect
+	github.com/docker/distribution v2.8.3+incompatible // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
-	github.com/google/gofuzz v1.1.0 // indirect
-	github.com/gorilla/mux v1.8.0 // indirect
+	github.com/google/gofuzz v1.2.0 // indirect
+	github.com/gorilla/mux v1.8.1 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/sirupsen/logrus v1.8.1 // indirect
-	golang.org/x/net v0.3.1-0.20221206200815-1e63c2f08a10 // indirect
-	golang.org/x/sys v0.3.0 // indirect
-	golang.org/x/text v0.5.0 // indirect
+	github.com/sirupsen/logrus v1.9.3 // indirect
+	golang.org/x/net v0.28.0 // indirect
+	golang.org/x/sys v0.24.0 // indirect
+	golang.org/x/text v0.17.0 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	k8s.io/klog/v2 v2.80.1 // indirect
-	k8s.io/utils v0.0.0-20221107191617-1a15be271d1d // indirect
-	sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2 // indirect
-	sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect
-	sigs.k8s.io/yaml v1.3.0 // 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
 )

go.sum

@@ -1,50 +1,57 @@
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/docker/distribution v2.7.1+incompatible h1:a5mlkVzth6W5A4fOsS3D2EO5BUmsJpcB+cRlLU7cSug=
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-github.com/go-logr/logr v1.2.0/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
-github.com/go-logr/logr v1.2.3 h1:2DntVwHkVopvECVRSlL5PSo9eG+cAkDCuckLubN+rq0=
-github.com/go-logr/logr v1.2.3/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/docker/distribution v2.8.3+incompatible h1:AtKxIZ36LoNK51+Z6RpzLpddBirtxJnzDrHLEKxTAYk=
+github.com/docker/distribution v2.8.3+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
+github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
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-github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
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-github.com/google/gofuzz v1.1.0 h1:Hsa8mG0dQ46ij8Sl2AYJDUv1oA9/d6Vk+3LG99Oe02g=
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+github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
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@@ -56,8 +63,8 @@ golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
-golang.org/x/net v0.3.1-0.20221206200815-1e63c2f08a10 h1:Frnccbp+ok2GkUS2tC84yAq/U9Vg+0sIO7aRL3T4Xnc=
-golang.org/x/net v0.3.1-0.20221206200815-1e63c2f08a10/go.mod h1:MBQ8lrhLObU/6UmLb4fmbmk5OcyYmqtbGd/9yIeKjEE=
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+golang.org/x/net v0.28.0/go.mod h1:yqtgsTWOOnlGLG9GFRrK3++bGOUEkNBoHZc8MEDWPNg=
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@@ -66,12 +73,13 @@ golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7w
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+golang.org/x/text v0.17.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
@@ -81,7 +89,8 @@ golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8T
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/inf.v0 v0.9.1 h1:73M5CoZyi3ZLMOyDlQh031Cx6N9NDJ2Vvfl76EDAgDc=
 gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
@@ -90,17 +99,17 @@ gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-k8s.io/api v0.26.1 h1:f+SWYiPd/GsiWwVRz+NbFyCgvv75Pk9NK6dlkZgpCRQ=
-k8s.io/api v0.26.1/go.mod h1:xd/GBNgR0f707+ATNyPmQ1oyKSgndzXij81FzWGsejg=
-k8s.io/apimachinery v0.26.1 h1:8EZ/eGJL+hY/MYCNwhmDzVqq2lPl3N3Bo8rvweJwXUQ=
-k8s.io/apimachinery v0.26.1/go.mod h1:tnPmbONNJ7ByJNz9+n9kMjNP8ON+1qoAIIC70lztu74=
-k8s.io/klog/v2 v2.80.1 h1:atnLQ121W371wYYFawwYx1aEY2eUfs4l3J72wtgAwV4=
-k8s.io/klog/v2 v2.80.1/go.mod h1:y1WjHnz7Dj687irZUWR/WLkLc5N1YHtjLdmgWjndZn0=
-k8s.io/utils v0.0.0-20221107191617-1a15be271d1d h1:0Smp/HP1OH4Rvhe+4B8nWGERtlqAGSftbSbbmm45oFs=
-k8s.io/utils v0.0.0-20221107191617-1a15be271d1d/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
-sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2 h1:iXTIw73aPyC+oRdyqqvVJuloN1p0AC/kzH07hu3NE+k=
-sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2/go.mod h1:B8JuhiUyNFVKdsE8h686QcCxMaH6HrOAZj4vswFpcB0=
-sigs.k8s.io/structured-merge-diff/v4 v4.2.3 h1:PRbqxJClWWYMNV1dhaG4NsibJbArud9kFxnAMREiWFE=
-sigs.k8s.io/structured-merge-diff/v4 v4.2.3/go.mod h1:qjx8mGObPmV2aSZepjQjbmb2ihdVs8cGKBraizNC69E=
-sigs.k8s.io/yaml v1.3.0 h1:a2VclLzOGrwOHDiV8EfBGhvjHvP46CtW5j6POvhYGGo=
-sigs.k8s.io/yaml v1.3.0/go.mod h1:GeOyir5tyXNByN85N/dRIT9es5UQNerPYEKK56eTBm8=
+k8s.io/api v0.30.3 h1:ImHwK9DCsPA9uoU3rVh4QHAHHK5dTSv1nxJUapx8hoQ=
+k8s.io/api v0.30.3/go.mod h1:GPc8jlzoe5JG3pb0KJCSLX5oAFIW3/qNJITlDj8BH04=
+k8s.io/apimachinery v0.30.3 h1:q1laaWCmrszyQuSQCfNB8cFgCuDAoPszKY4ucAjDwHc=
+k8s.io/apimachinery v0.30.3/go.mod h1:iexa2somDaxdnj7bha06bhb43Zpa6eWH8N8dbqVjTUc=
+k8s.io/klog/v2 v2.130.1 h1:n9Xl7H1Xvksem4KFG4PYbdQCQxqc/tTUyrgXaOhHSzk=
+k8s.io/klog/v2 v2.130.1/go.mod h1:3Jpz1GvMt720eyJH1ckRHK1EDfpxISzJ7I9OYgaDtPE=
+k8s.io/utils v0.0.0-20240711033017-18e509b52bc8 h1:pUdcCO1Lk/tbT5ztQWOBi5HBgbBP1J8+AsQnQCKsi8A=
+k8s.io/utils v0.0.0-20240711033017-18e509b52bc8/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
+sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd h1:EDPBXCAspyGV4jQlpZSudPeMmr1bNJefnuqLsRAsHZo=
+sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd/go.mod h1:B8JuhiUyNFVKdsE8h686QcCxMaH6HrOAZj4vswFpcB0=
+sigs.k8s.io/structured-merge-diff/v4 v4.4.1 h1:150L+0vs/8DA78h1u02ooW1/fFq/Lwr+sGiqlzvrtq4=
+sigs.k8s.io/structured-merge-diff/v4 v4.4.1/go.mod h1:N8hJocpFajUSSeSJ9bOZ77VzejKZaXsTtZo4/u7Io08=
+sigs.k8s.io/yaml v1.4.0 h1:Mk1wCc2gy/F0THH0TAp1QYyJNzRm2KCLy3o5ASXVI5E=
+sigs.k8s.io/yaml v1.4.0/go.mod h1:Ejl7/uTz7PSA4eKMyQCUTnhZYNmLIl+5c2lQPGR2BPY=

main.go

@@ -2,9 +2,10 @@ package main
 
 import (
 	"flag"
-	corev1 "k8s.io/api/core/v1"
 	"net/http"
 
+	corev1 "k8s.io/api/core/v1"
+
 	"github.com/kelseyhightower/envconfig"
 	"github.com/sqooba/go-common/logging"
 	"github.com/sqooba/go-common/version"
@@ -22,6 +23,7 @@ type envConfig struct {
 	ImagePullPolicyToForce string   `envconfig:"IMAGE_PULL_POLICY_TO_FORCE" default:"Always"`
 	DefaultStorageClass    string   `envconfig:"DEFAULT_STORAGE_CLASS"`
 	ExcludeNamespaces      []string `envconfig:"EXCLUDE_NAMESPACES"`
+	IncludeNamespaces      []string `envconfig:"INCLUDE_NAMESPACES"`
 	IgnoredRegistries      []string `envconfig:"IGNORED_REGISTRIES"`
 }
 
@@ -37,6 +39,7 @@ type mutationWH struct {
 	imagePullPolicyToForce corev1.PullPolicy
 	defaultStorageClass    string
 	excludedNamespaces     []string
+	includedNamespaces     []string
 	ignoredRegistries      []string
 }
 
@@ -73,6 +76,7 @@ func main() {
 		imagePullPolicyToForce: pullPolicyToForce,
 		defaultStorageClass:    env.DefaultStorageClass,
 		excludedNamespaces:     env.ExcludeNamespaces,
+		includedNamespaces:     env.IncludeNamespaces,
 		ignoredRegistries:      env.IgnoredRegistries,
 	}
 

mutations.go

@@ -143,7 +143,7 @@ func (wh *mutationWH) applyMutationOnPod(pod corev1.Pod) ([]patchOperation, erro
 					patches = append(patches, patchOperation{
 						Op:    "add",
 						Path:  fmt.Sprintf("/spec/imagePullSecrets/%d", len(pod.Spec.ImagePullSecrets)),
-						Value: []map[string]string{{"name": wh.imagePullSecret}},
+						Value: map[string]string{"name": wh.imagePullSecret},
 					})
 				}
 			} else {

mutations_test.go

@@ -624,7 +624,7 @@ func TestImagePullSecretAppendToExistingSecret(t *testing.T) {
 	assert.Equal(t, 1, len(patches))
 	assert.Equal(t, "add", patches[0].Op)
 	assert.Equal(t, "/spec/imagePullSecrets/2", patches[0].Path)
-	assert.Equal(t, []map[string]string{{"name": "a-new-pull-secret"}}, patches[0].Value)
+	assert.Equal(t, map[string]string{"name": "a-new-pull-secret"}, patches[0].Value)
 }
 
 func TestMissingPullPolicy(t *testing.T) {