k3s/pkg/cli/agent/agent.go
2019-03-01 17:07:55 -07:00

73 lines
1.5 KiB
Go

package agent
import (
"context"
"fmt"
"io/ioutil"
"os"
"strings"
"time"
"github.com/rancher/k3s/pkg/agent"
"github.com/rancher/k3s/pkg/cli/cmds"
"github.com/rancher/norman/pkg/resolvehome"
"github.com/rancher/norman/signal"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
func readToken(path string) (string, error) {
if path == "" {
return "", nil
}
for {
tokenBytes, err := ioutil.ReadFile(path)
if err == nil {
return strings.TrimSpace(string(tokenBytes)), nil
} else if os.IsNotExist(err) {
logrus.Infof("Waiting for %s to be available\n", path)
time.Sleep(2 * time.Second)
} else {
return "", err
}
}
}
func Run(ctx *cli.Context) error {
if os.Getuid() != 0 {
return fmt.Errorf("agent must be ran as root")
}
if cmds.AgentConfig.TokenFile != "" {
token, err := readToken(cmds.AgentConfig.TokenFile)
if err != nil {
return err
}
cmds.AgentConfig.Token = token
}
if cmds.AgentConfig.Token == "" && cmds.AgentConfig.ClusterSecret == "" {
return fmt.Errorf("--token is required")
}
if cmds.AgentConfig.ServerURL == "" {
return fmt.Errorf("--server is required")
}
logrus.Infof("Starting k3s agent %s", ctx.App.Version)
dataDir, err := resolvehome.Resolve(cmds.AgentConfig.DataDir)
if err != nil {
return err
}
cfg := cmds.AgentConfig
cfg.Debug = ctx.GlobalBool("debug")
cfg.DataDir = dataDir
contextCtx := signal.SigTermCancelContext(context.Background())
return agent.Run(contextCtx, cfg)
}