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cmd/containerboot: split main.go (#13517)

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containerboot's main.go had grown to well over 1000 lines with
lots of disparate bits of functionality. This commit is pure copy-
paste to group related functionality outside of the main function
into its own set of files. Everything is still in the main package
to keep the diff incremental and reviewable.

Updates #cleanup

Signed-off-by: Tom Proctor <tomhjp@users.noreply.github.com>
This commit is contained in:
Tom Proctor
2024-09-19 17:58:26 +01:00
committed by GitHub
parent af5a845a87
commit d0a56a8870
7 changed files with 830 additions and 744 deletions
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51
cmd/containerboot/kube.go
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@@ -8,7 +8,6 @@ package main
import (
"context"
"encoding/json"
"errors"
"fmt"
"log"
"net/http"
@@ -75,56 +74,6 @@ func deleteAuthKey(ctx context.Context, secretName string) error {
var kc kubeclient.Client
// setupKube is responsible for doing any necessary configuration and checks to
// ensure that tailscale state storage and authentication mechanism will work on
// Kubernetes.
func (cfg *settings) setupKube(ctx context.Context) error {
if cfg.KubeSecret == "" {
return nil
}
canPatch, canCreate, err := kc.CheckSecretPermissions(ctx, cfg.KubeSecret)
if err != nil {
return fmt.Errorf("Some Kubernetes permissions are missing, please check your RBAC configuration: %v", err)
}
cfg.KubernetesCanPatch = canPatch
s, err := kc.GetSecret(ctx, cfg.KubeSecret)
if err != nil && kubeclient.IsNotFoundErr(err) && !canCreate {
return fmt.Errorf("Tailscale state Secret %s does not exist and we don't have permissions to create it. "+
"If you intend to store tailscale state elsewhere than a Kubernetes Secret, "+
"you can explicitly set TS_KUBE_SECRET env var to an empty string. "+
"Else ensure that RBAC is set up that allows the service account associated with this installation to create Secrets.", cfg.KubeSecret)
} else if err != nil && !kubeclient.IsNotFoundErr(err) {
return fmt.Errorf("Getting Tailscale state Secret %s: %v", cfg.KubeSecret, err)
}
if cfg.AuthKey == "" && !isOneStepConfig(cfg) {
if s == nil {
log.Print("TS_AUTHKEY not provided and kube secret does not exist, login will be interactive if needed.")
return nil
}
keyBytes, _ := s.Data["authkey"]
key := string(keyBytes)
if key != "" {
// This behavior of pulling authkeys from kube secrets was added
// at the same time as the patch permission, so we can enforce
// that we must be able to patch out the authkey after
// authenticating if you want to use this feature. This avoids
// us having to deal with the case where we might leave behind
// an unnecessary reusable authkey in a secret, like a rake in
// the grass.
if !cfg.KubernetesCanPatch {
return errors.New("authkey found in TS_KUBE_SECRET, but the pod doesn't have patch permissions on the secret to manage the authkey.")
}
cfg.AuthKey = key
} else {
log.Print("No authkey found in kube secret and TS_AUTHKEY not provided, login will be interactive if needed.")
}
}
return nil
}
func initKubeClient(root string) {
if root != "/" {
// If we are running in a test, we need to set the root path to the fake