open-consul/agent/connect/ca/provider_vault_auth_k8s.go

48 lines
1.2 KiB
Go

package ca
import (
"fmt"
"os"
"strings"
"github.com/hashicorp/consul/agent/structs"
)
func NewK8sAuthClient(authMethod *structs.VaultAuthMethod) (*VaultAuthClient, error) {
params := authMethod.Params
role, ok := params["role"].(string)
if !ok || strings.TrimSpace(role) == "" {
return nil, fmt.Errorf("missing 'role' value")
}
// don't check for `token_path` as it is optional
authClient := NewVaultAPIAuthClient(authMethod, "")
// Note the `jwt` can be passed directly in the authMethod as a Param value
// is a freeform map in the config where they could hardcode it.
if legacyCheck(params, "jwt") {
return authClient, nil
}
authClient.LoginDataGen = K8sLoginDataGen
return authClient, nil
}
func K8sLoginDataGen(authMethod *structs.VaultAuthMethod) (map[string]any, error) {
params := authMethod.Params
role := params["role"].(string)
// read token from file on path
tokenPath, ok := params["token_path"].(string)
if !ok || strings.TrimSpace(tokenPath) == "" {
tokenPath = defaultK8SServiceAccountTokenPath
}
rawToken, err := os.ReadFile(tokenPath)
if err != nil {
return nil, err
}
return map[string]any{
"role": role,
"jwt": strings.TrimSpace(string(rawToken)),
}, nil
}