mirror of https://github.com/k3s-io/k3s
80 lines
2.3 KiB
Go
80 lines
2.3 KiB
Go
package agent
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import (
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"context"
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"math/rand"
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"os"
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"time"
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"github.com/rancher/k3s/pkg/agent/config"
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"github.com/rancher/k3s/pkg/agent/proxy"
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daemonconfig "github.com/rancher/k3s/pkg/daemons/config"
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"github.com/rancher/k3s/pkg/daemons/executor"
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"github.com/sirupsen/logrus"
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"k8s.io/component-base/logs"
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_ "k8s.io/component-base/metrics/prometheus/restclient" // for client metric registration
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_ "k8s.io/component-base/metrics/prometheus/version" // for version metric registration
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)
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const (
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unixPrefix = "unix://"
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windowsPrefix = "npipe://"
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)
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func Agent(ctx context.Context, nodeConfig *daemonconfig.Node, proxy proxy.Proxy) error {
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rand.Seed(time.Now().UTC().UnixNano())
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logs.InitLogs()
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defer logs.FlushLogs()
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if err := startKubelet(&nodeConfig.AgentConfig); err != nil {
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return err
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}
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go func() {
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if !config.KubeProxyDisabled(ctx, nodeConfig, proxy) {
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if err := startKubeProxy(&nodeConfig.AgentConfig); err != nil {
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logrus.Fatalf("Failed to start kube-proxy: %v", err)
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}
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}
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}()
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return nil
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}
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func startKubeProxy(cfg *daemonconfig.Agent) error {
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argsMap := kubeProxyArgs(cfg)
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args := daemonconfig.GetArgsList(argsMap, cfg.ExtraKubeProxyArgs)
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logrus.Infof("Running kube-proxy %s", daemonconfig.ArgString(args))
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return executor.KubeProxy(args)
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}
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func startKubelet(cfg *daemonconfig.Agent) error {
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argsMap := kubeletArgs(cfg)
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args := daemonconfig.GetArgsList(argsMap, cfg.ExtraKubeletArgs)
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logrus.Infof("Running kubelet %s", daemonconfig.ArgString(args))
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return executor.Kubelet(args)
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}
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func addFeatureGate(current, new string) string {
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if current == "" {
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return new
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}
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return current + "," + new
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}
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// ImageCredProvAvailable checks to see if the kubelet image credential provider bin dir and config
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// files exist and are of the correct types. This is exported so that it may be used by downstream projects.
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func ImageCredProvAvailable(cfg *daemonconfig.Agent) bool {
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if info, err := os.Stat(cfg.ImageCredProvBinDir); err != nil || !info.IsDir() {
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logrus.Debugf("Kubelet image credential provider bin directory check failed: %v", err)
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return false
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}
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if info, err := os.Stat(cfg.ImageCredProvConfig); err != nil || info.IsDir() {
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logrus.Debugf("Kubelet image credential provider config file check failed: %v", err)
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return false
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}
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return true
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}
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