Read kube_generate_type from containers.conf

Use the kube_generate_type from the containers.conf as
the default value for the --type flag for kube generate.
Override the default when userexplicitly sets the --type
flag.

Signed-off-by: Urvashi Mohnani <umohnani@redhat.com>

cmd/podman/kube/generate.go

@@ -4,14 +4,12 @@ import (
 	"fmt"
 	"io"
 	"os"
-	"strings"
 
 	"github.com/containers/common/pkg/completion"
 	"github.com/containers/podman/v4/cmd/podman/common"
 	"github.com/containers/podman/v4/cmd/podman/generate"
 	"github.com/containers/podman/v4/cmd/podman/registry"
 	"github.com/containers/podman/v4/cmd/podman/utils"
-	"github.com/containers/podman/v4/libpod/define"
 	"github.com/containers/podman/v4/pkg/domain/entities"
 	"github.com/spf13/cobra"
 )
@@ -53,16 +51,16 @@ func init() {
 		Command: generateKubeCmd,
 		Parent:  generate.GenerateCmd,
 	})
-	generateFlags(generateKubeCmd)
+	generateFlags(generateKubeCmd, registry.PodmanConfig())
 
 	registry.Commands = append(registry.Commands, registry.CliCommand{
 		Command: kubeGenerateCmd,
 		Parent:  kubeCmd,
 	})
-	generateFlags(kubeGenerateCmd)
+	generateFlags(kubeGenerateCmd, registry.PodmanConfig())
 }
 
-func generateFlags(cmd *cobra.Command) {
+func generateFlags(cmd *cobra.Command, podmanConfig *entities.PodmanConfig) {
 	flags := cmd.Flags()
 	flags.BoolVarP(&generateOptions.Service, "service", "s", false, "Generate YAML for a Kubernetes service object")
 
@@ -70,9 +68,13 @@ func generateFlags(cmd *cobra.Command) {
 	flags.StringVarP(&generateFile, filenameFlagName, "f", "", "Write output to the specified path")
 	_ = cmd.RegisterFlagCompletionFunc(filenameFlagName, completion.AutocompleteDefault)
 
-	// TODO: default should be configurable in containers.conf
 	typeFlagName := "type"
-	flags.StringVarP(&generateOptions.Type, typeFlagName, "t", define.K8sKindPod, "Generate YAML for the given Kubernetes kind")
+	// If remote, don't read the client's containers.conf file
+	defaultGenerateType := ""
+	if !registry.IsRemote() {
+		defaultGenerateType = podmanConfig.ContainersConfDefaultsRO.Engine.KubeGenerateType
+	}
+	flags.StringVarP(&generateOptions.Type, typeFlagName, "t", defaultGenerateType, "Generate YAML for the given Kubernetes kind")
 	_ = cmd.RegisterFlagCompletionFunc(typeFlagName, completion.AutocompleteNone)
 
 	replicasFlagName := "replicas"
@@ -83,15 +85,6 @@ func generateFlags(cmd *cobra.Command) {
 }
 
 func generateKube(cmd *cobra.Command, args []string) error {
-	typeVal, err := cmd.Flags().GetString("type")
-	if err != nil {
-		return err
-	}
-	typeVal = strings.ToLower(typeVal)
-	if typeVal != define.K8sKindPod && typeVal != define.K8sKindDeployment {
-		return fmt.Errorf("invalid type given, only supported types are pod and deployment")
-	}
-
 	report, err := registry.ContainerEngine().GenerateKube(registry.GetContext(), args, generateOptions)
 	if err != nil {
 		return err

pkg/api/handlers/libpod/generate.go

@@ -5,7 +5,6 @@ import (
 	"net/http"
 
 	"github.com/containers/podman/v4/libpod"
-	"github.com/containers/podman/v4/libpod/define"
 	"github.com/containers/podman/v4/pkg/api/handlers/utils"
 	api "github.com/containers/podman/v4/pkg/api/types"
 	"github.com/containers/podman/v4/pkg/domain/entities"
@@ -96,7 +95,6 @@ func GenerateKube(w http.ResponseWriter, r *http.Request) {
 		Replicas int32    `schema:"replicas"`
 	}{
 		// Defaults would go here.
-		Type:     define.K8sKindPod,
 		Replicas: 1,
 	}
 
@@ -105,8 +103,19 @@ func GenerateKube(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	// Read the default kubeGenerateType from containers.conf it the user doesn't specify it
+	generateType := query.Type
+	if generateType == "" {
+		config, err := runtime.GetConfigNoCopy()
+		if err != nil {
+			utils.Error(w, http.StatusInternalServerError, err)
+			return
+		}
+		generateType = config.Engine.KubeGenerateType
+	}
+
 	containerEngine := abi.ContainerEngine{Libpod: runtime}
-	options := entities.GenerateKubeOptions{Service: query.Service, Type: query.Type, Replicas: query.Replicas}
+	options := entities.GenerateKubeOptions{Service: query.Service, Type: generateType, Replicas: query.Replicas}
 	report, err := containerEngine.GenerateKube(r.Context(), query.Names, options)
 	if err != nil {
 		utils.Error(w, http.StatusInternalServerError, fmt.Errorf("generating YAML: %w", err))

test/e2e/config/containers.conf

@@ -62,6 +62,7 @@ no_hosts=true
 
 network_cmd_options=["allow_host_loopback=true"]
 service_timeout=1234
+kube_generate_type="deployment"
 
 volume_plugin_timeout = 15
 

test/system/710-kube.bats

@@ -135,4 +135,45 @@ status  | =  | null
     run_podman rmi $(pause_image)
 }
 
+@test "podman kube generate - deployment" {
+    skip_if_remote "containersconf needs to be set on server side"
+    local pname=p$(random_string 15)
+    local cname1=c1$(random_string 15)
+    local cname2=c2$(random_string 15)
+
+    run_podman pod create --name $pname
+    run_podman container create --name $cname1 --pod $pname $IMAGE top
+    run_podman container create --name $cname2 --pod $pname $IMAGE bottom
+
+    containersconf=$PODMAN_TMPDIR/containers.conf
+    cat >$containersconf <<EOF
+[engine]
+kube_generate_type="deployment"
+EOF
+    CONTAINERS_CONF_OVERRIDE=$containersconf run_podman kube generate $pname
+
+    json=$(yaml2json <<<"$output")
+    # For debugging purposes in the event we regress, we can see the generate output to know what went wrong
+    jq . <<<"$json"
+
+    # See container test above for description of this table
+    expect="
+apiVersion | =  | apps/v1
+kind       | =  | Deployment
+
+metadata.creationTimestamp | =~ | [0-9T:-]\\+Z
+metadata.labels.app        | =  | ${pname}
+metadata.name              | =  | ${pname}-deployment
+"
+
+    while read key op expect; do
+        actual=$(jq -r -c ".$key" <<<"$json")
+        assert "$actual" $op "$expect" ".$key"
+    done < <(parse_table "$expect")
+
+    run_podman rm $cname1 $cname2
+    run_podman pod rm $pname
+    run_podman rmi $(pause_image)
+}
+
 # vim: filetype=sh