forked from gravitational/teleport
/
output_kubernetes.go
139 lines (117 loc) · 3.78 KB
/
output_kubernetes.go
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/*
* Teleport
* Copyright (C) 2023 Gravitational, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package config
import (
"context"
"fmt"
"os"
"github.com/gravitational/trace"
"gopkg.in/yaml.v3"
"github.com/gravitational/teleport/lib/tbot/bot"
"github.com/gravitational/teleport/lib/tbot/identity"
)
const KubernetesOutputType = "kubernetes"
// KubernetesOutput produces credentials which can be used to connect to a
// Kubernetes Cluster through teleport.
type KubernetesOutput struct {
// Destination is where the credentials should be written to.
Destination bot.Destination `yaml:"destination"`
// Roles is the list of roles to request for the generated credentials.
// If empty, it defaults to all the bot's roles.
Roles []string `yaml:"roles,omitempty"`
// KubernetesCluster is the name of the Kubernetes cluster in Teleport.
// This is named a little more verbosely to avoid conflicting with the
// name of the Teleport cluster to use.
KubernetesCluster string `yaml:"kubernetes_cluster"`
}
func (o *KubernetesOutput) templates() []template {
return []template{
&templateTLSCAs{},
&templateIdentity{},
&templateKubernetes{
clusterName: o.KubernetesCluster,
executablePathGetter: os.Executable,
},
}
}
func (o *KubernetesOutput) Render(ctx context.Context, p provider, ident *identity.Identity) error {
ctx, span := tracer.Start(
ctx,
"KubernetesOutput/Render",
)
defer span.End()
dest := o.GetDestination()
if err := identity.SaveIdentity(ctx, ident, dest, identity.DestinationKinds()...); err != nil {
return trace.Wrap(err, "persisting identity")
}
for _, t := range o.templates() {
if err := t.render(ctx, p, ident, dest); err != nil {
return trace.Wrap(err, "rendering template %s", t.name())
}
}
return nil
}
func (o *KubernetesOutput) Init(ctx context.Context) error {
subDirs, err := listSubdirectories(o.templates())
if err != nil {
return trace.Wrap(err)
}
return trace.Wrap(o.Destination.Init(ctx, subDirs))
}
func (o *KubernetesOutput) CheckAndSetDefaults() error {
if err := validateOutputDestination(o.Destination); err != nil {
return trace.Wrap(err)
}
if o.KubernetesCluster == "" {
return trace.BadParameter("kubernetes_cluster must not be empty")
}
return nil
}
func (o *KubernetesOutput) GetDestination() bot.Destination {
return o.Destination
}
func (o *KubernetesOutput) GetRoles() []string {
return o.Roles
}
func (o *KubernetesOutput) Describe() []FileDescription {
var fds []FileDescription
for _, t := range o.templates() {
fds = append(fds, t.describe()...)
}
return fds
}
func (o *KubernetesOutput) MarshalYAML() (interface{}, error) {
type raw KubernetesOutput
return withTypeHeader((*raw)(o), KubernetesOutputType)
}
func (o *KubernetesOutput) UnmarshalYAML(node *yaml.Node) error {
dest, err := extractOutputDestination(node)
if err != nil {
return trace.Wrap(err)
}
// Alias type to remove UnmarshalYAML to avoid recursion
type raw KubernetesOutput
if err := node.Decode((*raw)(o)); err != nil {
return trace.Wrap(err)
}
o.Destination = dest
return nil
}
func (o *KubernetesOutput) String() string {
return fmt.Sprintf("%s (%s)", KubernetesOutputType, o.GetDestination())
}