OpenAPI Provider (#157)

* Base openapi provider implementation Signed-off-by: Guilherme Cassolato <[email protected]> * Return without error from unimplemented ReadResourcesFromCluster func * Move slice helper functions Map nd Filter into the providers/common package * openapi package renamed openapi3 * thread-safe storage of specs * refactor: resource reader simplified as part of Provider and removing converter's unused fields * make provider resilient to invalid input openapi specs * Gateway and parentRefs * Declare github.com/getkin/kin-openapi as a direct dependency * Use github.com/samber/lo for handling slices based on common patterns (mapping, filtering), instead of custom implementation * Remove initialization of non converted kinds of resources TLSRoutes, TCPRoutes, ReferenceGrants * init func brought further upwards * code format * Provider-specific options --openapi3-backend and --openapi3-gateway-class-name Defined using a newly introduced system of dynamically registered provider-specific configuration flags. * provider-specific flag: --openapi3-gateway-tls-secret * ReferenceGrants for HTTPRoute to Backends and Gateway to TLS Secrets * fix: provider-specific configs for providers with dashes in the name * name Gateway and HTTPRoutes after the OAS title * fix: missing backend ref argument * update README * Support for backend port numbers * refactor: addressed comments from the pr * provider-specific conf renamed as provided-specific flags * mutex to read/write provider-specific flag definitions wrapped within a type along with the definitions themselves * minor string handling enhancements (concatenation, trim prefix) * additional comments explaining logics and reasoning throughout the code (thread-safety, helper funcs and expressions, etc) * log message in case of provider-specific flag supplied without a matching provider * more comments to explain the flow and decision of the converter * lint: typos, gofmt and false positives * return error in case of invalid OpenAPI 3.x spec --------- Signed-off-by: Guilherme Cassolato <[email protected]>
kubernetes-sigs · May 30, 2024 · 21f9c46 · 21f9c46
1 parent 825f587
commit 21f9c46
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Showing 24 changed files with 3,380 additions and 12 deletions.
diff --git a/PROVIDER.md b/PROVIDER.md
@@ -96,7 +96,7 @@ func newConverter(conf *i2gw.ProviderConf) *converter {
 	}
 }
 ```
-4. Create a new struct named after the provider you are implementing. This struct should embed the previous 2 structs 
+4. Create a new struct named after the provider you are implementing. This struct should embed the previous 2 structs
 you created.
 ```go
 package examplegateway
@@ -152,17 +152,45 @@ import (
 In case you want to add support for the conversion of a specific feature within a provider (see for example the canary
 feature of ingress-nginx) you'll want to implement a `FeatureParser` function.
 
-Different `FeatureParsers` within the same provider will run in undetermined order. This means that when building a 
+Different `FeatureParsers` within the same provider will run in undetermined order. This means that when building a
 `Gateway API` resource manifest, you cannot assume anything about previously initialized fields.
 The function must modify / create only the required fields of the resource manifest and nothing else.
 
 For example, lets say we are implementing the canary feature of some provider. When building the `HTTPRoute`, we cannot
-assume that the `BackendRefs` is already initialized with every `BackendRef` required. The canary `FeatureParser` 
+assume that the `BackendRefs` is already initialized with every `BackendRef` required. The canary `FeatureParser`
 function must add every missing `BackendRef` and update existing ones.
 
 ### Testing the feature parser
 There are 2 main things that needs to be tested when creating a feature parser:
 1. The conversion logic is actually correct.
 2. The new function doesn't override other functions modifications.
 For example, if one implemented the mirror backend feature and it deletes canary weight from `BackendRefs`, we have a
-problem.
+problem.
+
+## Provider-specific flags
+To define provider-specific flags the user can supply in the `print` command, call the
+`i2gw.RegisterProviderSpecificFlag(ProviderName, i2gw.ProviderSpecificFlag)` function in the init function of the
+provider. E.g.:
+```go
+const Name = "example-gateway-provider"
+
+func init() {
+	i2gw.ProviderConstructorByName[Name] = NewProvider
+
+	i2gw.RegisterProviderSpecificFlag(ProviderName, i2gw.ProviderSpecificFlag{
+		Name:         "infrastructure-labels",
+		Description:  "Comma-separated list of Gateway infrastructure key=value labels",
+    DefaultValue: "",
+	})
+}
+```
+Users can provide a value to the flag as follows:
+```sh
+./ingress2gateway print --providers=example-gateway-provider --example-gateway-provider-infrastructure-labels="app=my-app"
+```
+The values of all provider-specific flags supplied by the user can be retrieved from the provider `conf`:
+```go
+if ps := conf.ProviderSpecificFlags[ProviderName]; ps != nil {
+  labels := ps["infrastructure-labels"]
+}
+```
diff --git a/cmd/print.go b/cmd/print.go
@@ -18,10 +18,12 @@ package cmd
 
 import (
 	"fmt"
+	"log"
 	"os"
 	"strings"
 
 	"github.com/kubernetes-sigs/ingress2gateway/pkg/i2gw"
+	"github.com/samber/lo"
 	"github.com/spf13/cobra"
 	"k8s.io/cli-runtime/pkg/genericclioptions"
 	"k8s.io/cli-runtime/pkg/printers"
@@ -32,6 +34,7 @@ import (
 	_ "github.com/kubernetes-sigs/ingress2gateway/pkg/i2gw/providers/ingressnginx"
 	_ "github.com/kubernetes-sigs/ingress2gateway/pkg/i2gw/providers/istio"
 	_ "github.com/kubernetes-sigs/ingress2gateway/pkg/i2gw/providers/kong"
+	_ "github.com/kubernetes-sigs/ingress2gateway/pkg/i2gw/providers/openapi3"
 )
 
 type PrintRunner struct {
@@ -59,6 +62,9 @@ type PrintRunner struct {
 
 	// providers indicates which providers are used to execute convert action.
 	providers []string
+
+	// Provider specific flags --<provider>-<flag>.
+	providerSpecificFlags map[string]*string
 }
 
 // PrintGatewayAPIObjects performs necessary steps to digest and print
@@ -75,7 +81,7 @@ func (pr *PrintRunner) PrintGatewayAPIObjects(cmd *cobra.Command, _ []string) er
 		return fmt.Errorf("failed to initialize namespace filter: %w", err)
 	}
 
-	gatewayResources, err := i2gw.ToGatewayAPIResources(cmd.Context(), pr.namespaceFilter, pr.inputFile, pr.providers)
+	gatewayResources, err := i2gw.ToGatewayAPIResources(cmd.Context(), pr.namespaceFilter, pr.inputFile, pr.providers, pr.getProviderSpecificFlags())
 	if err != nil {
 		return err
 	}
@@ -249,6 +255,14 @@ if specified with --namespace.`)
 	cmd.Flags().StringSliceVar(&pr.providers, "providers", i2gw.GetSupportedProviders(),
 		fmt.Sprintf("If present, the tool will try to convert only resources related to the specified providers, supported values are %v.", i2gw.GetSupportedProviders()))
 
+	pr.providerSpecificFlags = make(map[string]*string)
+	for provider, flags := range i2gw.GetProviderSpecificFlagDefinitions() {
+		for _, flag := range flags {
+			flagName := fmt.Sprintf("%s-%s", provider, flag.Name)
+			pr.providerSpecificFlags[flagName] = cmd.Flags().String(flagName, flag.DefaultValue, fmt.Sprintf("Provider-specific: %s. %s", provider, flag.Description))
+		}
+	}
+
 	cmd.MarkFlagsMutuallyExclusive("namespace", "all-namespaces")
 	return cmd
 }
@@ -262,3 +276,22 @@ func getNamespaceInCurrentContext() (string, error) {
 
 	return currentNamespace, err
 }
+
+// getProviderSpecificFlags returns the provider specific flags input by the user.
+// The flags are returned in a map where the key is the provider name and the value is a map of flag name to flag value.
+func (pr *PrintRunner) getProviderSpecificFlags() map[string]map[string]string {
+	providerSpecificFlags := make(map[string]map[string]string)
+	for flagName, value := range pr.providerSpecificFlags {
+		provider, found := lo.Find(pr.providers, func(p string) bool { return strings.HasPrefix(flagName, fmt.Sprintf("%s-", p)) })
+		if !found {
+			log.Printf("Warning: Ignoring flag %s as it does not match any of the providers", flagName)
+			continue
+		}
+		flagNameWithoutProvider := strings.TrimPrefix(flagName, fmt.Sprintf("%s-", provider))
+		if providerSpecificFlags[provider] == nil {
+			providerSpecificFlags[provider] = make(map[string]string)
+		}
+		providerSpecificFlags[provider][flagNameWithoutProvider] = *value
+	}
+	return providerSpecificFlags
+}
diff --git a/cmd/print_test.go b/cmd/print_test.go
@@ -24,6 +24,7 @@ import (
 	"reflect"
 	"testing"
 
+	"github.com/google/go-cmp/cmp"
 	"k8s.io/cli-runtime/pkg/printers"
 )
 
@@ -236,3 +237,60 @@ func Test_getNamespaceInCurrentContext(t *testing.T) {
 			actualNamespace, err, expectedNamespace, nil)
 	}
 }
+
+func Test_getProviderSpecificFlags(t *testing.T) {
+	value1 := "value1"
+	value2 := "value2"
+	testCases := []struct {
+		name                  string
+		providerSpecificFlags map[string]*string
+		providers             []string
+		expected              map[string]map[string]string
+	}{
+		{
+			name:                  "No provider specific configuration",
+			providerSpecificFlags: make(map[string]*string),
+			providers:             []string{"provider"},
+			expected:              map[string]map[string]string{},
+		},
+		{
+			name:                  "Provider specific configuration matching provider in the list",
+			providerSpecificFlags: map[string]*string{"provider-conf": &value1},
+			providers:             []string{"provider"},
+			expected: map[string]map[string]string{
+				"provider": {"conf": value1},
+			},
+		},
+		{
+			name: "Provider specific configuration matching providers in the list with multiple providers",
+			providerSpecificFlags: map[string]*string{
+				"provider-a-conf1": &value1,
+				"provider-b-conf2": &value2,
+			},
+			providers: []string{"provider-a", "provider-b", "provider-c"},
+			expected: map[string]map[string]string{
+				"provider-a": {"conf1": value1},
+				"provider-b": {"conf2": value2},
+			},
+		},
+		{
+			name:                  "Provider specific configuration not matching provider in the list",
+			providerSpecificFlags: map[string]*string{"provider-conf": &value1},
+			providers:             []string{"provider-a", "provider-b", "provider-c"},
+			expected:              map[string]map[string]string{},
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			pr := PrintRunner{
+				providerSpecificFlags: tc.providerSpecificFlags,
+				providers:             tc.providers,
+			}
+			actual := pr.getProviderSpecificFlags()
+			if diff := cmp.Diff(tc.expected, actual); diff != "" {
+				t.Errorf("Unexpected provider-specific flags, \n want: %+v\n got: %+v\n diff (-want +got):\n%s", tc.expected, actual, diff)
+			}
+		})
+	}
+}
diff --git a/go.mod b/go.mod
@@ -3,6 +3,7 @@ module github.com/kubernetes-sigs/ingress2gateway
 go 1.21
 
 require (
+	github.com/getkin/kin-openapi v0.124.0
 	github.com/google/go-cmp v0.6.0
 	github.com/kong/kubernetes-ingress-controller/v2 v2.12.3
 	github.com/spf13/cobra v1.8.0
@@ -18,8 +19,13 @@ require (
 )
 
 require (
+	github.com/invopop/yaml v0.2.0 // indirect
 	github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 // indirect
+	github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826 // indirect
+	github.com/perimeterx/marshmallow v1.1.5 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
+	github.com/samber/lo v1.39.0 // indirect
+	golang.org/x/exp v0.0.0-20231006140011-7918f672742d // indirect
 )
 
 require (
@@ -29,9 +35,9 @@ require (
 	github.com/evanphx/json-patch/v5 v5.7.0 // indirect
 	github.com/go-errors/errors v1.5.1 // indirect
 	github.com/go-logr/logr v1.3.0 // indirect
-	github.com/go-openapi/jsonpointer v0.20.0 // indirect
+	github.com/go-openapi/jsonpointer v0.20.2 // indirect
 	github.com/go-openapi/jsonreference v0.20.2 // indirect
-	github.com/go-openapi/swag v0.22.4 // indirect
+	github.com/go-openapi/swag v0.22.8 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/google/btree v1.1.2 // indirect

diff --git a/go.sum b/go.sum
@@ -16,6 +16,8 @@ github.com/evanphx/json-patch/v5 v5.7.0 h1:nJqP7uwL84RJInrohHfW0Fx3awjbm8qZeFv0n
 github.com/evanphx/json-patch/v5 v5.7.0/go.mod h1:VNkHZ/282BpEyt/tObQO8s5CMPmYYq14uClGH4abBuQ=
 github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nosvA=
 github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM=
+github.com/getkin/kin-openapi v0.124.0 h1:VSFNMB9C9rTKBnQ/fpyDU8ytMTr4dWI9QovSKj9kz/M=
+github.com/getkin/kin-openapi v0.124.0/go.mod h1:wb1aSZA/iWmorQP9KTAS/phLj/t17B5jT7+fS8ed9NM=
 github.com/go-errors/errors v1.5.1 h1:ZwEMSLRCapFLflTpT7NKaAc7ukJ8ZPEjzlxt8rPN8bk=
 github.com/go-errors/errors v1.5.1/go.mod h1:sIVyrIiJhuEF+Pj9Ebtd6P/rEYROXFi3BopGUQ5a5Og=
 github.com/go-logr/logr v1.3.0 h1:2y3SDp0ZXuc6/cjLSZ+Q3ir+QB9T/iG5yYRXqsagWSY=
@@ -25,11 +27,15 @@ github.com/go-logr/zapr v1.2.4/go.mod h1:FyHWQIzQORZ0QVE1BtVHv3cKtNLuXsbNLtpuhNa
 github.com/go-openapi/jsonpointer v0.19.6/go.mod h1:osyAmYz/mB/C3I+WsTTSgw1ONzaLJoLCyoi6/zppojs=
 github.com/go-openapi/jsonpointer v0.20.0 h1:ESKJdU9ASRfaPNOPRx12IUyA1vn3R9GiE3KYD14BXdQ=
 github.com/go-openapi/jsonpointer v0.20.0/go.mod h1:6PGzBjjIIumbLYysB73Klnms1mwnU4G3YHOECG3CedA=
+github.com/go-openapi/jsonpointer v0.20.2 h1:mQc3nmndL8ZBzStEo3JYF8wzmeWffDH4VbXz58sAx6Q=
+github.com/go-openapi/jsonpointer v0.20.2/go.mod h1:bHen+N0u1KEO3YlmqOjTT9Adn1RfD91Ar825/PuiRVs=
 github.com/go-openapi/jsonreference v0.20.2 h1:3sVjiK66+uXK/6oQ8xgcRKcFgQ5KXa2KvnJRumpMGbE=
 github.com/go-openapi/jsonreference v0.20.2/go.mod h1:Bl1zwGIM8/wsvqjsOQLJ/SH+En5Ap4rVB5KVcIDZG2k=
 github.com/go-openapi/swag v0.22.3/go.mod h1:UzaqsxGiab7freDnrUUra0MwWfN/q7tE4j+VcZ0yl14=
 github.com/go-openapi/swag v0.22.4 h1:QLMzNJnMGPRNDCbySlcj1x01tzU8/9LTTL9hZZZogBU=
 github.com/go-openapi/swag v0.22.4/go.mod h1:UzaqsxGiab7freDnrUUra0MwWfN/q7tE4j+VcZ0yl14=
+github.com/go-openapi/swag v0.22.8 h1:/9RjDSQ0vbFR+NyjGMkFTsA1IA0fmhKSThmfGZjicbw=
+github.com/go-openapi/swag v0.22.8/go.mod h1:6QT22icPLEqAM/z/TChgb4WAveCHF92+2gF0CNjHpPI=
 github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 h1:tfuBGBXKqDEevZMzYi5KSi8KkcZtzBcTgAUUtapy0OI=
 github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572/go.mod h1:9Pwr4B2jHnOSGXyyzV8ROjYa2ojvAY6HCGYYfMoC3Ls=
 github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
@@ -51,6 +57,7 @@ github.com/google/gofuzz v1.2.0 h1:xRy4A+RhZaiKjJ1bPfwQ8sedCA+YS2YcCHW6ec7JMi0=
 github.com/google/gofuzz v1.2.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/pprof v0.0.0-20210720184732-4bb14d4b1be1 h1:K6RDEckDVWvDI9JAJYCmNdQXq6neHJOYx3V6jnqNEec=
 github.com/google/pprof v0.0.0-20210720184732-4bb14d4b1be1/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
+github.com/google/pprof v0.0.0-20211214055906-6f57359322fd h1:1FjCyPC+syAzJ5/2S8fqdZK1R22vvA0J7JZKcuOIQ7Y=
 github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 h1:El6M4kTTCOh6aBiKaUGG7oYTSPP8MxqL4YI3kZKwcP4=
 github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510/go.mod h1:pupxD2MaaD3pAXIBCelhxNneeOaAeabZDe5s4K6zSpQ=
 github.com/google/uuid v1.4.0 h1:MtMxsa51/r9yyhkyLsVeVt0B+BGQZzpQiTQ4eHZ8bc4=
@@ -61,6 +68,8 @@ github.com/imdario/mergo v0.3.16 h1:wwQJbIsHYGMUyLSPrEq1CT16AhnhNJQ51+4fdHUnCl4=
 github.com/imdario/mergo v0.3.16/go.mod h1:WBLT9ZmE3lPoWsEzCh9LPo3TiwVN+ZKEjmz+hD27ysY=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/invopop/yaml v0.2.0 h1:7zky/qH+O0DwAyoobXUqvVBwgBFRxKoQ/3FjcVpjTMY=
+github.com/invopop/yaml v0.2.0/go.mod h1:2XuRLgs/ouIrW3XNzuNj7J3Nvu/Dig5MXvbCEdiBN3Q=
 github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
 github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
 github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
@@ -87,6 +96,8 @@ github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
+github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826 h1:RWengNIwukTxcDr9M+97sNutRR1RKhG96O6jWumTTnw=
+github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826/go.mod h1:TaXosZuwdSHYgviHp1DAtfrULt5eUgsSMsZf+YrPgl8=
 github.com/monochromegane/go-gitignore v0.0.0-20200626010858-205db1a8cc00 h1:n6/2gBQ3RWajuToeY6ZtZTIKv2v7ThUy5KKusIT0yc0=
 github.com/monochromegane/go-gitignore v0.0.0-20200626010858-205db1a8cc00/go.mod h1:Pm3mSP3c5uWn86xMLZ5Sa7JB9GsEZySvHYXCTK4E9q4=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
@@ -96,6 +107,8 @@ github.com/onsi/ginkgo/v2 v2.11.0 h1:WgqUCUt/lT6yXoQ8Wef0fsNn5cAuMK7+KT9UFRz2tcU
 github.com/onsi/ginkgo/v2 v2.11.0/go.mod h1:ZhrRA5XmEE3x3rhlzamx/JJvujdZoJ2uvgI7kR0iZvM=
 github.com/onsi/gomega v1.27.10 h1:naR28SdDFlqrG6kScpT8VWpu1xWY5nJRCF3XaYyBjhI=
 github.com/onsi/gomega v1.27.10/go.mod h1:RsS8tutOdbdgzbPtzzATp12yT7kM5I5aElG3evPbQ0M=
+github.com/perimeterx/marshmallow v1.1.5 h1:a2LALqQ1BlHM8PZblsDdidgv1mWi1DgC2UmX50IvK2s=
+github.com/perimeterx/marshmallow v1.1.5/go.mod h1:dsXbUu8CRzfYP5a87xpp0xq9S3u0Vchtcl8we9tYaXw=
 github.com/peterbourgon/diskv v2.0.1+incompatible h1:UBdAOUP5p4RWqPBg048CAvpKN+vxiaj6gdUUzhl4XmI=
 github.com/peterbourgon/diskv v2.0.1+incompatible/go.mod h1:uqqh8zWWbv1HBMNONnaR/tNboyR3/BZd58JJSHlUSCU=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
@@ -113,7 +126,10 @@ github.com/prometheus/procfs v0.12.0 h1:jluTpSng7V9hY0O2R9DzzJHYb2xULk9VTR1V1R/k
 github.com/prometheus/procfs v0.12.0/go.mod h1:pcuDEFsWDnvcgNzo4EEweacyhjeA9Zk3cnaOZAZEfOo=
 github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
 github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
+github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/samber/lo v1.39.0 h1:4gTz1wUhNYLhFSKl6O+8peW0v2F4BCY034GRpU9WnuA=
+github.com/samber/lo v1.39.0/go.mod h1:+m/ZKRl6ClXCE2Lgf3MsQlWfh4bn1bz6CXEOxnEXnEA=
 github.com/sergi/go-diff v1.1.0 h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0=
 github.com/sergi/go-diff v1.1.0/go.mod h1:STckp+ISIX8hZLjrqAeVduY0gWCT9IjLuqbuNXdaHfM=
 github.com/spf13/cobra v1.8.0 h1:7aJaZx1B85qltLMc546zn58BxxfZdR/W22ej9CFoEf0=
@@ -223,6 +239,7 @@ gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 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 v3.0.0/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=
 istio.io/api v1.20.0 h1:heE1eQoMsuZlwWOf7Xm8TKqKLNKVs11G/zMe5QyR1u4=

diff --git a/pkg/i2gw/ingress2gateway.go b/pkg/i2gw/ingress2gateway.go
@@ -30,7 +30,7 @@ import (
 	gatewayv1beta1 "sigs.k8s.io/gateway-api/apis/v1beta1"
 )
 
-func ToGatewayAPIResources(ctx context.Context, namespace string, inputFile string, providers []string) ([]GatewayResources, error) {
+func ToGatewayAPIResources(ctx context.Context, namespace string, inputFile string, providers []string, providerSpecificFlags map[string]map[string]string) ([]GatewayResources, error) {
 	var clusterClient client.Client
 
 	if inputFile == "" {
@@ -47,8 +47,9 @@ func ToGatewayAPIResources(ctx context.Context, namespace string, inputFile stri
 	}
 
 	providerByName, err := constructProviders(&ProviderConf{
-		Client:    clusterClient,
-		Namespace: namespace,
+		Client:                clusterClient,
+		Namespace:             namespace,
+		ProviderSpecificFlags: providerSpecificFlags,
 	}, providers)
 	if err != nil {
 		return nil, err