Allow user to generate support bundle in Airgap environment (#8683)

Currently eks-anywhere cannot generate support bundle in Airgap environment
because eks-a needs to read bundle manifest from remote URL.

This PR fixed the issue by allowing user to specify path of local
bundle manifest file so that eks-a does not need to read it from
remote URL.

Co-authored-by: Shizhao Liu <lshizhao@amazon.com>

cmd/eksctl-anywhere/cmd/supportbundle.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/spf13/cobra"
 
+	"github.com/aws/eks-anywhere/pkg/cluster"
 	"github.com/aws/eks-anywhere/pkg/dependencies"
 	"github.com/aws/eks-anywhere/pkg/diagnostics"
 	"github.com/aws/eks-anywhere/pkg/kubeconfig"
@@ -22,6 +23,7 @@ type createSupportBundleOptions struct {
 	bundleConfig          string
 	hardwareFileName      string
 	tinkerbellBootstrapIP string
+	bundlesManifest       string
 }
 
 var csbo = &createSupportBundleOptions{}
@@ -36,7 +38,7 @@ var supportbundleCmd = &cobra.Command{
 		if err := csbo.validate(cmd.Context()); err != nil {
 			return err
 		}
-		if err := csbo.createBundle(cmd.Context(), csbo.since, csbo.sinceTime, csbo.bundleConfig); err != nil {
+		if err := csbo.createBundle(cmd.Context(), csbo.since, csbo.sinceTime, csbo.bundleConfig, csbo.bundlesManifest); err != nil {
 			return fmt.Errorf("failed to create support bundle: %v", err)
 		}
 		return nil
@@ -50,6 +52,7 @@ func init() {
 	supportbundleCmd.Flags().StringVarP(&csbo.bundleConfig, "bundle-config", "", "", "Bundle Config file to use when generating support bundle")
 	supportbundleCmd.Flags().StringVarP(&csbo.fileName, "filename", "f", "", "Filename that contains EKS-A cluster configuration")
 	supportbundleCmd.Flags().StringVarP(&csbo.wConfig, "w-config", "w", "", "Kubeconfig file to use when creating support bundle for a workload cluster")
+	supportbundleCmd.Flags().StringVarP(&csbo.bundlesManifest, "bundles-manifest", "", "", "Bundles manifest to use when generating support bundle (required for generating support bundle in airgap environment)")
 	err := supportbundleCmd.MarkFlagRequired("filename")
 	if err != nil {
 		log.Fatalf("Error marking flag as required: %v", err)
@@ -70,8 +73,12 @@ func (csbo *createSupportBundleOptions) validate(ctx context.Context) error {
 	return nil
 }
 
-func (csbo *createSupportBundleOptions) createBundle(ctx context.Context, since, sinceTime, bundleConfig string) error {
-	clusterSpec, err := readAndValidateClusterSpec(csbo.fileName, version.Get())
+func (csbo *createSupportBundleOptions) createBundle(ctx context.Context, since, sinceTime, bundleConfig string, bundlesManifest string) error {
+	var opts []cluster.FileSpecBuilderOpt
+	if bundlesManifest != "" {
+		opts = append(opts, cluster.WithOverrideBundlesManifest(bundlesManifest))
+	}
+	clusterSpec, err := readAndValidateClusterSpec(csbo.fileName, version.Get(), opts...)
 	if err != nil {
 		return fmt.Errorf("unable to get cluster config from file: %v", err)
 	}

docs/content/en/docs/clustermgmt/support/supportbundle.md

@@ -39,6 +39,8 @@ If you provide a support bundle configuration file using the `--bundle-config` f
 for example one generated with `generate support-bundle-config`, 
 `generate support-bundle` will use the provided configuration when collecting information from your cluster and analyzing the results.
 
+If you want to generate support bundle in an airgapped environment, the `--bundles-manifest` flag must be set to the local path
+of your eks-a bundles manifest yaml file.
 ```
 Flags:
       --bundle-config string   Bundle Config file to use when generating support bundle
@@ -47,6 +49,7 @@ Flags:
       --since string           Collect pod logs in the latest duration like 5s, 2m, or 3h.
       --since-time string      Collect pod logs after a specific datetime(RFC3339) like 2021-06-28T15:04:05Z
   -w, --w-config string        Kubeconfig file to use when creating support bundle for a workload cluster
+      --bundles-manifest       Bundles manifest to use when generating support bundle (required for generating support bundle in airgap environment)
 ```
 
 ### Collecting and analyzing a bundle

docs/content/en/docs/reference/eksctl/anywhere_generate_support-bundle.md

@@ -24,6 +24,7 @@ anywhere generate support-bundle -f my-cluster.yaml [flags]
       --since string           Collect pod logs in the latest duration like 5s, 2m, or 3h.
       --since-time string      Collect pod logs after a specific datetime(RFC3339) like 2021-06-28T15:04:05Z
   -w, --w-config string        Kubeconfig file to use when creating support bundle for a workload cluster
+      --bundles-manifest       Bundles manifest to use when generating support bundle (required for generating support bundle in airgap environment)
 ```
 
 ### Options inherited from parent commands