mirror of
https://github.com/k3s-io/k3s.git
synced 2024-06-07 19:41:36 +00:00
97 lines
2.5 KiB
Go
97 lines
2.5 KiB
Go
package agent
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import (
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"crypto/tls"
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"fmt"
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"os"
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"path/filepath"
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"runtime"
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"github.com/erikdubbelboer/gspt"
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"github.com/k3s-io/k3s/pkg/agent"
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"github.com/k3s-io/k3s/pkg/cli/cmds"
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"github.com/k3s-io/k3s/pkg/datadir"
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"github.com/k3s-io/k3s/pkg/util"
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"github.com/k3s-io/k3s/pkg/version"
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"github.com/k3s-io/k3s/pkg/vpn"
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"github.com/rancher/wrangler/pkg/signals"
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"github.com/sirupsen/logrus"
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"github.com/urfave/cli"
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)
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func Run(ctx *cli.Context) error {
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// hide process arguments from ps output, since they may contain
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// database credentials or other secrets.
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gspt.SetProcTitle(os.Args[0] + " agent")
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// Evacuate cgroup v2 before doing anything else that may fork.
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if err := cmds.EvacuateCgroup2(); err != nil {
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return err
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}
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// Initialize logging, and subprocess reaping if necessary.
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// Log output redirection and subprocess reaping both require forking.
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if err := cmds.InitLogging(); err != nil {
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return err
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}
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if runtime.GOOS != "windows" && os.Getuid() != 0 && !cmds.AgentConfig.Rootless {
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return fmt.Errorf("agent must be run as root, or with --rootless")
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}
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if cmds.AgentConfig.TokenFile != "" {
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token, err := util.ReadFile(cmds.AgentConfig.TokenFile)
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if err != nil {
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return err
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}
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cmds.AgentConfig.Token = token
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}
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clientKubeletCert := filepath.Join(cmds.AgentConfig.DataDir, "agent", "client-kubelet.crt")
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clientKubeletKey := filepath.Join(cmds.AgentConfig.DataDir, "agent", "client-kubelet.key")
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_, err := tls.LoadX509KeyPair(clientKubeletCert, clientKubeletKey)
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if err != nil && cmds.AgentConfig.Token == "" {
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return fmt.Errorf("--token is required")
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}
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if cmds.AgentConfig.ServerURL == "" {
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return fmt.Errorf("--server is required")
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}
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if cmds.AgentConfig.FlannelIface != "" && len(cmds.AgentConfig.NodeIP) == 0 {
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cmds.AgentConfig.NodeIP.Set(util.GetIPFromInterface(cmds.AgentConfig.FlannelIface))
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}
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logrus.Info("Starting " + version.Program + " agent " + ctx.App.Version)
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dataDir, err := datadir.LocalHome(cmds.AgentConfig.DataDir, cmds.AgentConfig.Rootless)
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if err != nil {
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return err
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}
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cfg := cmds.AgentConfig
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cfg.Debug = ctx.GlobalBool("debug")
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cfg.DataDir = dataDir
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contextCtx := signals.SetupSignalContext()
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go cmds.WriteCoverage(contextCtx)
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if cmds.AgentConfig.VPNAuthFile != "" {
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cmds.AgentConfig.VPNAuth, err = util.ReadFile(cmds.AgentConfig.VPNAuthFile)
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if err != nil {
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return err
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}
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}
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// Starts the VPN in the agent if config was set up
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if cmds.AgentConfig.VPNAuth != "" {
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err := vpn.StartVPN(cmds.AgentConfig.VPNAuth)
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if err != nil {
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return err
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}
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}
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return agent.Run(contextCtx, cfg)
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}
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