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agent.go
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/
agent.go
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package agent
import (
"fmt"
"time"
"github.com/Sirupsen/logrus"
// "github.com/codegangpsta/cli"
"github.com/m0sth8/cli" // use fork until subcommands will be fixed
"golang.org/x/net/context"
"github.com/bearded-web/bearded/cmd"
agentServer "github.com/bearded-web/bearded/pkg/agent"
"github.com/bearded-web/bearded/pkg/client"
"github.com/bearded-web/bearded/pkg/config"
"github.com/bearded-web/bearded/pkg/config/flags"
"github.com/bearded-web/bearded/pkg/utils"
"github.com/bearded-web/bearded/pkg/utils/load"
)
const EnvPrefix = "BEARDED_AGENT"
func New() cli.Command {
agent := cli.Command{
Name: "agent",
Usage: "Start agent",
Flags: []cli.Flag{
cli.StringFlag{
Name: "config",
EnvVar: fmt.Sprintf("%s_CONFIG", EnvPrefix),
Usage: "path to config",
},
},
Action: cmd.TakeApi(agentAction),
}
cfg := config.NewAgent()
agent.Flags = append(agent.Flags, flags.GenerateFlags(cfg, flags.Opts{
EnvPrefix: EnvPrefix,
})...)
agent.Flags = append(agent.Flags, cmd.ApiFlags("BEARDED")...)
return agent
}
func agentAction(cliCtx *cli.Context, api *client.Client, timeout cmd.Timeout) {
cfg := config.NewAgent()
if cfgPath := cliCtx.String("config"); cfgPath != "" {
logrus.Infof("Load config from %s", cfgPath)
err := load.FromFile(cfgPath, cfg)
if err != nil {
logrus.Fatalf("Couldn't load config: %s", err)
return
}
}
logrus.Info("Load config from flags")
err := flags.ParseFlags(cfg, cliCtx, flags.Opts{
EnvPrefix: EnvPrefix,
})
if err != nil {
logrus.Fatal(err)
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
aErr := make(chan error)
go func(ch chan<- error) {
ch <- agentServer.ServeAgent(ctx, cfg, api)
}(aErr)
select {
case <-utils.NotifyInterrupt():
logrus.Infof("Interrupting by signal")
cancel()
select {
case err = <-aErr:
case <-time.After(time.Second * 20):
err = fmt.Errorf("Timeout exceeded")
}
case err = <-aErr:
}
if err != nil {
logrus.Fatal(err)
}
}