kubernetes_server_version data source (#2306)

* kubernetes_server_version data source

* Review comments fix

* Changelog and copyright headers

* add docs using tfplugindocs

---------

Co-authored-by: Mauricio Alvarez Leon <65101411+BBBmau@users.noreply.github.com>
Co-authored-by: BBBmau <alvarez.mauriciotm@gmail.com>

.changelog/2306.txt

@@ -0,0 +1,3 @@
+```release-note:feature
+New data source: `kubernetes_server_version`
+```

docs/data-sources/server_version.md

@@ -0,0 +1,29 @@
+---
+subcategory: "core/v1"
+page_title: "Kubernetes: kubernetes_server_version"
+description: |-
+  Retrieves and parses the server's version (git version). 
+---
+
+# kubernetes_server_version
+
+This data source reads the versioning information of the server and makes specific attributes available to Terraform. Read more at [version info reference](https://pkg.go.dev/k8s.io/apimachinery/pkg/version#Info)
+
+<!-- schema generated by tfplugindocs -->
+## Schema
+
+### Read-Only
+
+- `build_date` (String) Kubernetes server build date
+- `compiler` (String) Compiler used to build Kubernetes
+- `git_commit` (String) Git commit SHA
+- `git_tree_state` (String) Git commit tree state
+- `git_version` (String) Composite version and git commit sha
+- `go_version` (String) Go compiler version
+- `id` (String) The ID of this resource.
+- `major` (String) Major Kubernetes version
+- `minor` (String) Minor Kubernetes version
+- `platform` (String) Platform
+- `version` (String) Composite Kubernetes server version
+
+

kubernetes/data_source_kubernetes_server_version.go

@@ -0,0 +1,99 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
+package kubernetes
+
+import (
+	"context"
+
+	gversion "github.com/hashicorp/go-version"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+)
+
+func dataSourceKubernetesServerVersion() *schema.Resource {
+	return &schema.Resource{
+		ReadContext: dataSourceKubernetesServerVersionRead,
+		Description: "This data source reads the versioning information of the server and makes specific attributes available to Terraform. Read more at [version info reference](https://pkg.go.dev/k8s.io/apimachinery/pkg/version#Info)",
+		Schema: map[string]*schema.Schema{
+			"version": {
+				Type:        schema.TypeString,
+				Description: "Composite Kubernetes server version",
+				Computed:    true,
+			},
+			"build_date": {
+				Type:        schema.TypeString,
+				Description: "Kubernetes server build date",
+				Computed:    true,
+			},
+			"compiler": {
+				Type:        schema.TypeString,
+				Description: "Compiler used to build Kubernetes",
+				Computed:    true,
+			},
+			"git_commit": {
+				Type:        schema.TypeString,
+				Description: "Git commit SHA",
+				Computed:    true,
+			},
+			"git_tree_state": {
+				Type:        schema.TypeString,
+				Description: "Git commit tree state",
+				Computed:    true,
+			},
+			"git_version": {
+				Type:        schema.TypeString,
+				Description: "Composite version and git commit sha",
+				Computed:    true,
+			},
+			"major": {
+				Type:        schema.TypeString,
+				Description: "Major Kubernetes version",
+				Computed:    true,
+			},
+			"minor": {
+				Type:        schema.TypeString,
+				Description: "Minor Kubernetes version",
+				Computed:    true,
+			},
+			"platform": {
+				Type:        schema.TypeString,
+				Description: "Platform",
+				Computed:    true,
+			},
+			"go_version": {
+				Type:        schema.TypeString,
+				Description: "Go compiler version",
+				Computed:    true,
+			},
+		},
+	}
+}
+
+func dataSourceKubernetesServerVersionRead(ctx context.Context, d *schema.ResourceData, meta interface{}) diag.Diagnostics {
+	conn, err := meta.(KubeClientsets).MainClientset()
+	if err != nil {
+		return diag.FromErr(err)
+	}
+	sv, err := conn.ServerVersion()
+	if err != nil {
+		return diag.FromErr(err)
+	}
+
+	gv, err := gversion.NewVersion(sv.String())
+	if err != nil {
+		return diag.FromErr(err)
+	}
+	d.SetId(gv.String())
+	d.Set("version", gv.String())
+	d.Set("build_date", sv.BuildDate)
+	d.Set("compiler", sv.Compiler)
+	d.Set("git_commit", sv.GitCommit)
+	d.Set("git_tree_state", sv.GitTreeState)
+	d.Set("git_version", sv.GitVersion)
+	d.Set("go_version", sv.GoVersion)
+	d.Set("major", sv.Major)
+	d.Set("minor", sv.Minor)
+	d.Set("platform", sv.Platform)
+	return nil
+}

kubernetes/data_source_kubernetes_server_version_test.go

@@ -0,0 +1,61 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
+package kubernetes
+
+import (
+	"fmt"
+	"testing"
+
+	gversion "github.com/hashicorp/go-version"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/terraform"
+)
+
+func TestAccKubernetesDataSourceServerVersion_basic(t *testing.T) {
+	dataSourceName := "data.kubernetes_server_version.test"
+
+	resource.ParallelTest(t, resource.TestCase{
+		PreCheck:          func() { testAccPreCheck(t) },
+		ProviderFactories: testAccProviderFactories,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccKubernetesDataSourceServerVersionConfig_basic(),
+				Check: func(st *terraform.State) error {
+					meta := testAccProvider.Meta()
+					if meta == nil {
+						return fmt.Errorf("Provider not initialized, unable to check cluster version")
+					}
+					conn, err := meta.(KubeClientsets).MainClientset()
+					if err != nil {
+						return err
+					}
+					ver, err := conn.ServerVersion()
+					if err != nil {
+						return err
+					}
+					gver, err := gversion.NewVersion(ver.String())
+					if err != nil {
+						return err
+					}
+					return resource.ComposeAggregateTestCheckFunc(
+						resource.TestCheckResourceAttr(dataSourceName, "version", gver.String()),
+						resource.TestCheckResourceAttr(dataSourceName, "build_date", ver.BuildDate),
+						resource.TestCheckResourceAttr(dataSourceName, "compiler", ver.Compiler),
+						resource.TestCheckResourceAttr(dataSourceName, "git_commit", ver.GitCommit),
+						resource.TestCheckResourceAttr(dataSourceName, "git_tree_state", ver.GitTreeState),
+						resource.TestCheckResourceAttr(dataSourceName, "git_version", ver.GitVersion),
+						resource.TestCheckResourceAttr(dataSourceName, "major", ver.Major),
+						resource.TestCheckResourceAttr(dataSourceName, "minor", ver.Minor),
+						resource.TestCheckResourceAttr(dataSourceName, "platform", ver.Platform),
+						resource.TestCheckResourceAttr(dataSourceName, "go_version", ver.GoVersion),
+					)(st)
+				},
+			},
+		},
+	})
+}
+
+func testAccKubernetesDataSourceServerVersionConfig_basic() string {
+	return `data "kubernetes_server_version" "test" {}`
+}

kubernetes/provider.go

@@ -235,6 +235,7 @@ func Provider() *schema.Provider {
 			"kubernetes_persistent_volume_claim":    dataSourceKubernetesPersistentVolumeClaimV1(),
 			"kubernetes_persistent_volume_claim_v1": dataSourceKubernetesPersistentVolumeClaimV1(),
 			"kubernetes_nodes":                      dataSourceKubernetesNodes(),
+			"kubernetes_server_version":             dataSourceKubernetesServerVersion(),
 
 			// networking
 			"kubernetes_ingress":    dataSourceKubernetesIngress(),

templates/data-sources/server_version.md.tmpl

@@ -0,0 +1,12 @@
+---
+subcategory: "core/v1"
+page_title: "Kubernetes: kubernetes_server_version"
+description: |-
+  Retrieves and parses the server's version (git version). 
+---
+
+# {{ .Name }}
+
+{{ .Description }}
+
+{{ .SchemaMarkdown }}