From 815ed0961a8d8db46b9032d2f2204fb06df3f57e Mon Sep 17 00:00:00 2001
From: w3lld1 <42353747+w3lld1@users.noreply.github.com>
Date: Thu, 30 Jul 2026 03:32:52 +0200
Subject: [PATCH 1/3] feat: expose the running server version (#544)

Signed-off-by: w3lld1 <42353747+w3lld1@users.noreply.github.com>
---
 cmd/interlink/main.go             |  1 +
 pkg/interlink/api/version.go      | 22 ++++++++++++++++++++++
 pkg/interlink/api/version_test.go | 30 ++++++++++++++++++++++++++++++
 3 files changed, 53 insertions(+)
 create mode 100644 pkg/interlink/api/version.go
 create mode 100644 pkg/interlink/api/version_test.go

diff --git a/cmd/interlink/main.go b/cmd/interlink/main.go
index acb29825..094f6000 100644
--- a/cmd/interlink/main.go
+++ b/cmd/interlink/main.go
@@ -193,6 +193,7 @@ func main() {
 	mutex.HandleFunc("/pinglink", interLinkAPIs.Ping)
 	mutex.HandleFunc("/getLogs", interLinkAPIs.GetLogsHandler)
 	mutex.HandleFunc("/updateCache", interLinkAPIs.UpdateCacheHandler)
+	mutex.HandleFunc("/version", api.VersionHandler(virtualkubelet.KubeletVersion))
 
 	interLinkEndpoint := ""
 	switch {
diff --git a/pkg/interlink/api/version.go b/pkg/interlink/api/version.go
new file mode 100644
index 00000000..314a58ac
--- /dev/null
+++ b/pkg/interlink/api/version.go
@@ -0,0 +1,22 @@
+package api
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+// VersionHandler reports the version of the running interLink server.
+func VersionHandler(version string) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodGet {
+			w.Header().Set("Allow", http.MethodGet)
+			w.WriteHeader(http.StatusMethodNotAllowed)
+			return
+		}
+
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(struct {
+			Version string `json:"version"`
+		}{Version: version})
+	}
+}
diff --git a/pkg/interlink/api/version_test.go b/pkg/interlink/api/version_test.go
new file mode 100644
index 00000000..a34a413e
--- /dev/null
+++ b/pkg/interlink/api/version_test.go
@@ -0,0 +1,30 @@
+package api
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestVersionHandlerReturnsRunningVersion(t *testing.T) {
+	recorder := httptest.NewRecorder()
+	request := httptest.NewRequest(http.MethodGet, "/version", nil)
+
+	VersionHandler("1.2.3").ServeHTTP(recorder, request)
+
+	require.Equal(t, http.StatusOK, recorder.Code)
+	require.Equal(t, "application/json", recorder.Header().Get("Content-Type"))
+	require.JSONEq(t, `{"version":"1.2.3"}`, recorder.Body.String())
+}
+
+func TestVersionHandlerRejectsNonGetRequests(t *testing.T) {
+	recorder := httptest.NewRecorder()
+	request := httptest.NewRequest(http.MethodPost, "/version", nil)
+
+	VersionHandler("1.2.3").ServeHTTP(recorder, request)
+
+	require.Equal(t, http.StatusMethodNotAllowed, recorder.Code)
+	require.Equal(t, http.MethodGet, recorder.Header().Get("Allow"))
+}

From 9ecebd455d56358f7c8a243f90574d071a6d008f Mon Sep 17 00:00:00 2001
From: w3lld1 <42353747+w3lld1@users.noreply.github.com>
Date: Thu, 30 Jul 2026 03:38:47 +0200
Subject: [PATCH 2/3] fix: check version response encoding errors

Signed-off-by: w3lld1 <42353747+w3lld1@users.noreply.github.com>
---
 pkg/interlink/api/version.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/pkg/interlink/api/version.go b/pkg/interlink/api/version.go
index 314a58ac..3a0f7fd3 100644
--- a/pkg/interlink/api/version.go
+++ b/pkg/interlink/api/version.go
@@ -15,8 +15,10 @@ func VersionHandler(version string) http.HandlerFunc {
 		}
 
 		w.Header().Set("Content-Type", "application/json")
-		_ = json.NewEncoder(w).Encode(struct {
+		if err := json.NewEncoder(w).Encode(struct {
 			Version string `json:"version"`
-		}{Version: version})
+		}{Version: version}); err != nil {
+			return
+		}
 	}
 }

From 64cff911a04b4027096d489b7e87db44a932e04a Mon Sep 17 00:00:00 2001
From: w3lld1 <42353747+w3lld1@users.noreply.github.com>
Date: Sun, 23 Aug 2026 11:09:38 +0200
Subject: [PATCH 3/3] fix: report the interLink server version

Signed-off-by: w3lld1 <42353747+w3lld1@users.noreply.github.com>
---
 cmd/interlink/main.go              | 2 +-
 cmd/virtual-kubelet/set-version.sh | 5 +++++
 pkg/interlink/version.go           | 4 ++++
 3 files changed, 10 insertions(+), 1 deletion(-)
 create mode 100644 pkg/interlink/version.go

diff --git a/cmd/interlink/main.go b/cmd/interlink/main.go
index 094f6000..4be4c500 100644
--- a/cmd/interlink/main.go
+++ b/cmd/interlink/main.go
@@ -193,7 +193,7 @@ func main() {
 	mutex.HandleFunc("/pinglink", interLinkAPIs.Ping)
 	mutex.HandleFunc("/getLogs", interLinkAPIs.GetLogsHandler)
 	mutex.HandleFunc("/updateCache", interLinkAPIs.UpdateCacheHandler)
-	mutex.HandleFunc("/version", api.VersionHandler(virtualkubelet.KubeletVersion))
+	mutex.HandleFunc("/version", api.VersionHandler(interlink.Version))
 
 	interLinkEndpoint := ""
 	switch {
diff --git a/cmd/virtual-kubelet/set-version.sh b/cmd/virtual-kubelet/set-version.sh
index d55fffa3..f33d7579 100755
--- a/cmd/virtual-kubelet/set-version.sh
+++ b/cmd/virtual-kubelet/set-version.sh
@@ -8,4 +8,9 @@ var (
 	KubeletVersion = "$KUBELET_VERSION"
 )
 EOF
+cat << EOF > pkg/interlink/version.go
+package interlink
+
+var Version = "$KUBELET_VERSION"
+EOF
 fi
diff --git a/pkg/interlink/version.go b/pkg/interlink/version.go
new file mode 100644
index 00000000..39bd7636
--- /dev/null
+++ b/pkg/interlink/version.go
@@ -0,0 +1,4 @@
+package interlink
+
+// Version is the version of the running interLink server.
+var Version = "test"