/
resources.go
142 lines (116 loc) · 3.78 KB
/
resources.go
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package cmd
import (
"fmt"
"github.com/HamzaZo/helm-adopt/internal/discovery"
"github.com/HamzaZo/helm-adopt/internal/generate"
"github.com/HamzaZo/helm-adopt/internal/utils"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
"helm.sh/helm/v3/cmd/helm/require"
"io"
)
var (
chartDir string
releaseName string
dryRun bool
debug bool
)
type EnvSettings struct {
KubeConfigFile string
KubeContext string
Namespace string
}
const basicExample = `
Adopt k8s resources into a new generated helm chart
Examples:
$ %[1]s adopt resources deployments:nginx services:my-svc -o/--output frontend
$ %[1]s adopt resources deployments:nginx clusterrolebindings:binding-rbac -o/--output frontend -n/--namespace <ns>
$ %[1]s adopt resources statefulsets:nginx services:my-svc -r/--release RELEASE-NAME -o/--output frontend -c/--kube-context <ctx>
$ %[1]s adopt resources deployments:backend,frontend services:backend,frontend -o/--output api -k/--kubeconfig <kcfg>
`
func NewResourcesCmd(out io.Writer) *cobra.Command {
cmd := &cobra.Command{
Use: "resources <pluralKind>:<name>",
Short: "adopt k8s resources into a new generated helm chart",
Long: fmt.Sprintf(basicExample, "helm"),
Args: require.MinimumNArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
err := runResources(args, out)
if err != nil {
return err
}
return nil
},
}
flags := cmd.Flags()
flags.StringVarP(&chartDir, "output", "o", "", "Specify the chart directory of loaded yaml files")
cmd.MarkFlagRequired("output")
flags.StringVarP(&releaseName, "release", "r", "", "Specify the name for the generated release")
flags.BoolVar(&dryRun, "dry-run", false, "Print what resources will be adopted ")
flags.BoolVar(&debug, "debug-mode", false, "Show the generated manifests on STDOUT")
Settings.AddFlags(flags)
return cmd
}
// AddFlags binds flags to the given flagset
func (e *EnvSettings) AddFlags(fs *pflag.FlagSet) {
fs.StringVarP(&e.KubeConfigFile, "kubeconfig", "k", "", "path to the kubeconfig file")
fs.StringVarP(&e.KubeContext, "kube-context", "c", e.KubeContext, "name of the kubeconfig context to use")
fs.StringVarP(&e.Namespace, "namespace", "n", e.Namespace, "namespace scope for this request")
}
//runResources adopt given k8s resources into a helm chart
func runResources(args []string, out io.Writer) error {
if releaseName == "" {
releaseName = "generated-release"
}
err := utils.ChartValidator(chartDir, releaseName)
if err != nil {
return err
}
log.Info("Adopting resources..")
input, err := utils.GetAllArgs(args)
if err != nil {
return err
}
kubeconfig := discovery.KubConfigSetup{
Context: Settings.KubeContext,
KubeConfigFile: Settings.KubeConfigFile,
Namespace: Settings.Namespace,
}
helmClient, err := discovery.NewHelmClient(kubeconfig, kubeconfig.Namespace)
if err != nil {
return err
}
content, err := fetchResources(helmClient, input)
if err != nil {
return err
}
chart := &generate.Chart{
ChartName: chartDir,
ReleaseName: releaseName,
Content: content,
}
err = chart.Generate(helmClient, out, dryRun, debug)
if err != nil {
return err
}
return nil
}
//fetchResources get namespaced and non-namespaced resources contents based on given input.
func fetchResources(client *discovery.ApiClient, input map[string][]string) (map[string][]byte, error) {
output := make(map[string][]byte)
namespaceResource, clusterResource, err := discovery.FetchedFilteredResources(client, input)
if err != nil {
return nil, err
}
ns, err := namespaceResource.Query(client, client.Namespace)
if err != nil {
return nil, err
}
cls, err := clusterResource.Query(client, "")
if err != nil {
return nil, err
}
output = utils.MergeMapsBytes(ns, cls)
return output, err
}