mirror of https://github.com/k3s-io/k3s
238 lines
5.9 KiB
Go
238 lines
5.9 KiB
Go
package agent
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"io/ioutil"
|
|
"os"
|
|
"path/filepath"
|
|
"strings"
|
|
"time"
|
|
|
|
"k8s.io/apimachinery/pkg/labels"
|
|
|
|
systemd "github.com/coreos/go-systemd/daemon"
|
|
"github.com/rancher/k3s/pkg/agent/config"
|
|
"github.com/rancher/k3s/pkg/agent/containerd"
|
|
"github.com/rancher/k3s/pkg/agent/flannel"
|
|
"github.com/rancher/k3s/pkg/agent/loadbalancer"
|
|
"github.com/rancher/k3s/pkg/agent/netpol"
|
|
"github.com/rancher/k3s/pkg/agent/syssetup"
|
|
"github.com/rancher/k3s/pkg/agent/tunnel"
|
|
"github.com/rancher/k3s/pkg/cli/cmds"
|
|
"github.com/rancher/k3s/pkg/clientaccess"
|
|
"github.com/rancher/k3s/pkg/daemons/agent"
|
|
daemonconfig "github.com/rancher/k3s/pkg/daemons/config"
|
|
"github.com/rancher/k3s/pkg/nodeconfig"
|
|
"github.com/rancher/k3s/pkg/rootless"
|
|
"github.com/sirupsen/logrus"
|
|
"k8s.io/apimachinery/pkg/api/equality"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/client-go/kubernetes"
|
|
v1 "k8s.io/client-go/kubernetes/typed/core/v1"
|
|
"k8s.io/client-go/tools/clientcmd"
|
|
)
|
|
|
|
const (
|
|
InternalIPLabel = "k3s.io/internal-ip"
|
|
ExternalIPLabel = "k3s.io/external-ip"
|
|
HostnameLabel = "k3s.io/hostname"
|
|
)
|
|
|
|
func run(ctx context.Context, cfg cmds.Agent, lb *loadbalancer.LoadBalancer) error {
|
|
nodeConfig := config.Get(ctx, cfg)
|
|
|
|
if !nodeConfig.NoFlannel {
|
|
if err := flannel.Prepare(ctx, nodeConfig); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
if !nodeConfig.Docker && nodeConfig.ContainerRuntimeEndpoint == "" {
|
|
if err := containerd.Run(ctx, nodeConfig); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
if err := tunnel.Setup(ctx, nodeConfig, lb.Update); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := agent.Agent(&nodeConfig.AgentConfig); err != nil {
|
|
return err
|
|
}
|
|
|
|
coreClient, err := coreClient(nodeConfig.AgentConfig.KubeConfigKubelet)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if !nodeConfig.NoFlannel {
|
|
if err := flannel.Run(ctx, nodeConfig, coreClient.CoreV1().Nodes()); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
if err := configureNode(ctx, &nodeConfig.AgentConfig, coreClient.CoreV1().Nodes()); err != nil {
|
|
return err
|
|
}
|
|
|
|
if !nodeConfig.AgentConfig.DisableNPC {
|
|
if err := netpol.Run(ctx, nodeConfig); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
<-ctx.Done()
|
|
return ctx.Err()
|
|
}
|
|
|
|
func coreClient(cfg string) (kubernetes.Interface, error) {
|
|
restConfig, err := clientcmd.BuildConfigFromFlags("", cfg)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return kubernetes.NewForConfig(restConfig)
|
|
}
|
|
|
|
func Run(ctx context.Context, cfg cmds.Agent) error {
|
|
if err := validate(); err != nil {
|
|
return err
|
|
}
|
|
syssetup.Configure()
|
|
|
|
if cfg.Rootless && !cfg.RootlessAlreadyUnshared {
|
|
if err := rootless.Rootless(cfg.DataDir); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
cfg.DataDir = filepath.Join(cfg.DataDir, "agent")
|
|
if err := os.MkdirAll(cfg.DataDir, 0700); err != nil {
|
|
return err
|
|
}
|
|
|
|
lb, err := loadbalancer.Setup(ctx, cfg)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if lb != nil {
|
|
cfg.ServerURL = lb.LoadBalancerServerURL()
|
|
}
|
|
|
|
for {
|
|
newToken, err := clientaccess.NormalizeAndValidateTokenForUser(cfg.ServerURL, cfg.Token, "node")
|
|
if err != nil {
|
|
logrus.Error(err)
|
|
select {
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
case <-time.After(2 * time.Second):
|
|
}
|
|
continue
|
|
}
|
|
cfg.Token = newToken
|
|
break
|
|
}
|
|
|
|
systemd.SdNotify(true, "READY=1\n")
|
|
return run(ctx, cfg, lb)
|
|
}
|
|
|
|
func validate() error {
|
|
cgroups, err := ioutil.ReadFile("/proc/self/cgroup")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if !strings.Contains(string(cgroups), "cpuset") {
|
|
logrus.Warn("Failed to find cpuset cgroup, you may need to add \"cgroup_enable=cpuset\" to your linux cmdline (/boot/cmdline.txt on a Raspberry Pi)")
|
|
}
|
|
|
|
if !strings.Contains(string(cgroups), "memory") {
|
|
msg := "ailed to find memory cgroup, you may need to add \"cgroup_memory=1 cgroup_enable=memory\" to your linux cmdline (/boot/cmdline.txt on a Raspberry Pi)"
|
|
logrus.Error("F" + msg)
|
|
return errors.New("f" + msg)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func configureNode(ctx context.Context, agentConfig *daemonconfig.Agent, nodes v1.NodeInterface) error {
|
|
for {
|
|
node, err := nodes.Get(ctx, agentConfig.NodeName, metav1.GetOptions{})
|
|
if err != nil {
|
|
logrus.Infof("Waiting for kubelet to be ready on node %s: %v", agentConfig.NodeName, err)
|
|
time.Sleep(1 * time.Second)
|
|
continue
|
|
}
|
|
|
|
newLabels, updateMutables := updateMutableLabels(agentConfig, node.Labels)
|
|
|
|
updateAddresses := !agentConfig.DisableCCM
|
|
if updateAddresses {
|
|
newLabels, updateAddresses = updateAddressLabels(agentConfig, newLabels)
|
|
}
|
|
|
|
// inject node config
|
|
updateNode, err := nodeconfig.SetNodeConfigAnnotations(node)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if updateAddresses || updateMutables {
|
|
node.Labels = newLabels
|
|
updateNode = true
|
|
}
|
|
if updateNode {
|
|
if _, err := nodes.Update(ctx, node, metav1.UpdateOptions{}); err != nil {
|
|
logrus.Infof("Failed to update node %s: %v", agentConfig.NodeName, err)
|
|
select {
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
case <-time.After(time.Second):
|
|
continue
|
|
}
|
|
}
|
|
logrus.Infof("labels have been set successfully on node: %s", agentConfig.NodeName)
|
|
} else {
|
|
logrus.Infof("labels have already set on node: %s", agentConfig.NodeName)
|
|
}
|
|
|
|
break
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func updateMutableLabels(agentConfig *daemonconfig.Agent, nodeLabels map[string]string) (map[string]string, bool) {
|
|
result := map[string]string{}
|
|
|
|
for _, m := range agentConfig.NodeLabels {
|
|
var (
|
|
v string
|
|
p = strings.SplitN(m, `=`, 2)
|
|
k = p[0]
|
|
)
|
|
if len(p) > 1 {
|
|
v = p[1]
|
|
}
|
|
result[k] = v
|
|
}
|
|
result = labels.Merge(nodeLabels, result)
|
|
return result, !equality.Semantic.DeepEqual(nodeLabels, result)
|
|
}
|
|
|
|
func updateAddressLabels(agentConfig *daemonconfig.Agent, nodeLabels map[string]string) (map[string]string, bool) {
|
|
result := map[string]string{
|
|
InternalIPLabel: agentConfig.NodeIP,
|
|
HostnameLabel: agentConfig.NodeName,
|
|
}
|
|
|
|
if agentConfig.NodeExternalIP != "" {
|
|
result[ExternalIPLabel] = agentConfig.NodeExternalIP
|
|
}
|
|
|
|
result = labels.Merge(nodeLabels, result)
|
|
return result, !equality.Semantic.DeepEqual(nodeLabels, result)
|
|
}
|