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controller.go
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controller.go
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package node
import (
"encoding/json"
"fmt"
"time"
"github.com/pkg/errors"
"github.com/rancher/norman/event"
"github.com/rancher/norman/objectclient"
"github.com/rancher/norman/types/values"
"github.com/rancher/rancher/pkg/api/customization/clusterregistrationtokens"
"github.com/rancher/rancher/pkg/encryptedstore"
"github.com/rancher/rancher/pkg/nodeconfig"
"github.com/rancher/rancher/pkg/ref"
"github.com/rancher/rancher/pkg/systemaccount"
"github.com/rancher/types/apis/management.cattle.io/v3"
"github.com/rancher/types/config"
"github.com/sirupsen/logrus"
"golang.org/x/crypto/ssh"
"k8s.io/api/core/v1"
kerror "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
typedv1 "k8s.io/client-go/kubernetes/typed/core/v1"
)
const (
defaultEngineInstallURL = "https://releases.rancher.com/install-docker/17.03.2.sh"
amazonec2 = "amazonec2"
)
func Register(management *config.ManagementContext) {
secretStore, err := nodeconfig.NewStore(management.Core.Namespaces(""), management.K8sClient.CoreV1())
if err != nil {
logrus.Fatal(err)
}
nodeClient := management.Management.Nodes("")
nodeLifecycle := &Lifecycle{
systemAccountManager: systemaccount.NewManager(management),
secretStore: secretStore,
nodeClient: nodeClient,
nodeTemplateClient: management.Management.NodeTemplates(""),
nodeTemplateGenericClient: management.Management.NodeTemplates("").ObjectClient().UnstructuredClient(),
configMapGetter: management.K8sClient.CoreV1(),
logger: management.EventLogger,
clusterLister: management.Management.Clusters("").Controller().Lister(),
}
nodeClient.AddLifecycle("node-controller", nodeLifecycle)
}
type Lifecycle struct {
systemAccountManager *systemaccount.Manager
secretStore *encryptedstore.GenericEncryptedStore
nodeTemplateGenericClient objectclient.GenericClient
nodeClient v3.NodeInterface
nodeTemplateClient v3.NodeTemplateInterface
configMapGetter typedv1.ConfigMapsGetter
logger event.Logger
clusterLister v3.ClusterLister
}
func (m *Lifecycle) setupCustom(obj *v3.Node) {
obj.Status.NodeConfig = &v3.RKEConfigNode{
NodeName: obj.Namespace + ":" + obj.Name,
HostnameOverride: obj.Spec.RequestedHostname,
Address: obj.Spec.CustomConfig.Address,
InternalAddress: obj.Spec.CustomConfig.InternalAddress,
User: obj.Spec.CustomConfig.User,
DockerSocket: obj.Spec.CustomConfig.DockerSocket,
SSHKey: obj.Spec.CustomConfig.SSHKey,
Labels: obj.Spec.CustomConfig.Label,
Port: "22",
Role: roles(obj),
}
if obj.Status.NodeConfig.User == "" {
obj.Status.NodeConfig.User = "root"
}
obj.Status.InternalNodeStatus.Addresses = []v1.NodeAddress{
{
Type: v1.NodeInternalIP,
Address: obj.Status.NodeConfig.Address,
},
}
}
func isCustom(obj *v3.Node) bool {
return obj.Spec.CustomConfig != nil && obj.Spec.CustomConfig.Address != ""
}
func (m *Lifecycle) setWaiting(node *v3.Node) {
v3.NodeConditionRegistered.IsUnknown(node)
v3.NodeConditionRegistered.Message(node, "waiting to register with Kubernetes")
}
func (m *Lifecycle) Create(obj *v3.Node) (*v3.Node, error) {
if isCustom(obj) {
m.setupCustom(obj)
newObj, err := v3.NodeConditionInitialized.Once(obj, func() (runtime.Object, error) {
if err := validateCustomHost(obj); err != nil {
return obj, err
}
m.setWaiting(obj)
return obj, nil
})
return newObj.(*v3.Node), err
}
if obj.Spec.NodeTemplateName == "" {
return obj, nil
}
newObj, err := v3.NodeConditionInitialized.Once(obj, func() (runtime.Object, error) {
template, err := m.getNodeTemplate(obj.Spec.NodeTemplateName)
if err != nil {
return obj, err
}
obj.Status.NodeTemplateSpec = &template.Spec
if obj.Spec.RequestedHostname == "" {
obj.Spec.RequestedHostname = obj.Name
}
if obj.Status.NodeTemplateSpec.EngineInstallURL == "" {
obj.Status.NodeTemplateSpec.EngineInstallURL = defaultEngineInstallURL
}
rawTemplate, err := m.nodeTemplateGenericClient.GetNamespaced(template.Namespace, template.Name, metav1.GetOptions{})
if err != nil {
return obj, err
}
rawConfig, ok := values.GetValue(rawTemplate.(*unstructured.Unstructured).Object, template.Spec.Driver+"Config")
if !ok {
return obj, fmt.Errorf("node config not specified")
}
if template.Spec.Driver == amazonec2 {
setEc2ClusterIDTag(rawConfig, obj.Namespace)
}
bytes, err := json.Marshal(rawConfig)
if err != nil {
return obj, errors.Wrap(err, "failed to marshal node driver confg")
}
config, err := nodeconfig.NewNodeConfig(m.secretStore, obj)
if err != nil {
return obj, errors.Wrap(err, "failed to save node driver config")
}
defer config.Cleanup()
config.SetDriverConfig(string(bytes))
return obj, config.Save()
})
return newObj.(*v3.Node), err
}
func (m *Lifecycle) getNodeTemplate(nodeTemplateName string) (*v3.NodeTemplate, error) {
ns, n := ref.Parse(nodeTemplateName)
return m.nodeTemplateClient.GetNamespaced(ns, n, metav1.GetOptions{})
}
func (m *Lifecycle) Remove(obj *v3.Node) (*v3.Node, error) {
if obj.Status.NodeTemplateSpec == nil {
return obj, nil
}
newObj, err := v3.NodeConditionRemoved.DoUntilTrue(obj, func() (runtime.Object, error) {
found, err := m.isNodeInAppliedSpec(obj)
if err != nil {
return obj, err
}
if found {
return obj, errors.New("waiting for node to be removed from cluster")
}
config, err := nodeconfig.NewNodeConfig(m.secretStore, obj)
if err != nil {
return obj, err
}
if err := config.Restore(); err != nil {
return obj, err
}
defer config.Remove()
mExists, err := nodeExists(config.Dir(), obj.Spec.RequestedHostname)
if err != nil {
return obj, err
}
if mExists {
m.logger.Infof(obj, "Removing node %s", obj.Spec.RequestedHostname)
if err := deleteNode(config.Dir(), obj); err != nil {
return obj, err
}
m.logger.Infof(obj, "Removing node %s done", obj.Spec.RequestedHostname)
}
return obj, nil
})
return newObj.(*v3.Node), err
}
func (m *Lifecycle) provision(driverConfig, nodeDir string, obj *v3.Node) (*v3.Node, error) {
configRawMap := map[string]interface{}{}
if err := json.Unmarshal([]byte(driverConfig), &configRawMap); err != nil {
return obj, errors.Wrap(err, "failed to unmarshal node config")
}
// Since we know this will take a long time persist so user sees status
obj, err := m.nodeClient.Update(obj)
if err != nil {
return obj, err
}
createCommandsArgs := buildCreateCommand(obj, configRawMap)
cmd := buildCommand(nodeDir, createCommandsArgs)
m.logger.Infof(obj, "Provisioning node %s", obj.Spec.RequestedHostname)
stdoutReader, stderrReader, err := startReturnOutput(cmd)
if err != nil {
return obj, err
}
defer stdoutReader.Close()
defer stderrReader.Close()
defer cmd.Wait()
obj, err = m.reportStatus(stdoutReader, stderrReader, obj)
if err != nil {
return obj, err
}
if err := cmd.Wait(); err != nil {
return obj, err
}
if err := m.deployAgent(nodeDir, obj); err != nil {
return obj, err
}
m.logger.Infof(obj, "Provisioning node %s done", obj.Spec.RequestedHostname)
return obj, nil
}
func (m *Lifecycle) deployAgent(nodeDir string, obj *v3.Node) error {
token, err := m.systemAccountManager.GetOrCreateSystemClusterToken(obj.Namespace)
if err != nil {
return err
}
drun := clusterregistrationtokens.NodeCommand(token)
args := buildAgentCommand(obj, drun)
cmd := buildCommand(nodeDir, args)
output, err := cmd.CombinedOutput()
if err != nil {
return errors.Wrap(err, string(output))
}
return nil
}
func (m *Lifecycle) ready(obj *v3.Node) (*v3.Node, error) {
config, err := nodeconfig.NewNodeConfig(m.secretStore, obj)
if err != nil {
return obj, err
}
defer config.Cleanup()
if err := config.Restore(); err != nil {
return obj, err
}
driverConfig, err := config.DriverConfig()
if err != nil {
return nil, err
}
// Provision in the background so we can poll and save the config
done := make(chan error)
go func() {
newObj, err := m.provision(driverConfig, config.Dir(), obj)
obj = newObj
done <- err
}()
// Poll and save config
outer:
for {
select {
case err = <-done:
break outer
case <-time.After(5 * time.Second):
config.Save()
}
}
newObj, saveError := v3.NodeConditionConfigSaved.Once(obj, func() (runtime.Object, error) {
return m.saveConfig(config, config.Dir(), obj)
})
obj = newObj.(*v3.Node)
if err == nil {
return obj, saveError
}
return obj, err
}
func (m *Lifecycle) Updated(obj *v3.Node) (*v3.Node, error) {
obj, err := m.checkLabels(obj)
if err != nil {
return obj, err
}
newObj, err := v3.NodeConditionProvisioned.Once(obj, func() (runtime.Object, error) {
if obj.Status.NodeTemplateSpec == nil {
m.setWaiting(obj)
return obj, nil
}
obj, err := m.ready(obj)
if err == nil {
m.setWaiting(obj)
}
return obj, err
})
return newObj.(*v3.Node), err
}
func (m *Lifecycle) saveConfig(config *nodeconfig.NodeConfig, nodeDir string, obj *v3.Node) (*v3.Node, error) {
logrus.Infof("Generating and uploading node config %s", obj.Spec.RequestedHostname)
if err := config.Save(); err != nil {
return obj, err
}
ip, err := config.IP()
if err != nil {
return obj, err
}
interalAddress, err := config.InternalIP()
if err != nil {
return obj, err
}
sshKey, err := getSSHKey(nodeDir, obj)
if err != nil {
return obj, err
}
sshUser, err := config.SSHUser()
if err != nil {
return obj, err
}
if err := config.Save(); err != nil {
return obj, err
}
template, err := m.getNodeTemplate(obj.Spec.NodeTemplateName)
if err != nil {
return obj, err
}
obj.Status.NodeConfig = &v3.RKEConfigNode{
NodeName: obj.Namespace + ":" + obj.Name,
Address: ip,
InternalAddress: interalAddress,
User: sshUser,
Role: roles(obj),
HostnameOverride: obj.Spec.RequestedHostname,
SSHKey: sshKey,
Labels: template.Labels,
}
obj.Status.InternalNodeStatus.Addresses = []v1.NodeAddress{
{
Type: v1.NodeInternalIP,
Address: obj.Status.NodeConfig.Address,
},
}
if len(obj.Status.NodeConfig.Role) == 0 {
obj.Status.NodeConfig.Role = []string{"worker"}
}
return obj, nil
}
func (m *Lifecycle) isNodeInAppliedSpec(node *v3.Node) (bool, error) {
// worker/controlplane nodes can just be immediately deleted
if !node.Spec.Etcd {
return false, nil
}
cluster, err := m.clusterLister.Get("", node.Namespace)
if err != nil {
if kerror.IsNotFound(err) {
return false, nil
}
return false, err
}
if cluster == nil {
return false, nil
}
if cluster.DeletionTimestamp != nil {
return false, nil
}
if cluster.Status.AppliedSpec.RancherKubernetesEngineConfig == nil {
return false, nil
}
for _, rkeNode := range cluster.Status.AppliedSpec.RancherKubernetesEngineConfig.Nodes {
nodeName := rkeNode.NodeName
if len(nodeName) == 0 {
continue
}
if nodeName == fmt.Sprintf("%s:%s", node.Namespace, node.Name) {
return true, nil
}
}
return false, nil
}
func validateCustomHost(obj *v3.Node) error {
if obj.Spec.Imported {
return nil
}
customConfig := obj.Spec.CustomConfig
signer, err := ssh.ParsePrivateKey([]byte(customConfig.SSHKey))
if err != nil {
return errors.Wrapf(err, "sshKey format is invalid")
}
config := &ssh.ClientConfig{
User: customConfig.User,
Auth: []ssh.AuthMethod{
ssh.PublicKeys(signer),
},
HostKeyCallback: ssh.InsecureIgnoreHostKey(),
}
conn, err := ssh.Dial("tcp", customConfig.Address+":22", config)
if err != nil {
return errors.Wrapf(err, "Failed to validate ssh connection to address [%s]", customConfig.Address)
}
defer conn.Close()
return nil
}
func roles(node *v3.Node) []string {
var roles []string
if node.Spec.Etcd {
roles = append(roles, "etcd")
}
if node.Spec.ControlPlane {
roles = append(roles, "controlplane")
}
if node.Spec.Worker {
roles = append(roles, "worker")
}
if len(roles) == 0 {
return []string{"worker"}
}
return roles
}