331 lines
7.8 KiB
Go
331 lines
7.8 KiB
Go
package main
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import (
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"fmt"
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"net"
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"os"
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"os/signal"
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"sort"
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"strings"
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"syscall"
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"runtime/pprof"
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"github.com/Sirupsen/logrus"
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"github.com/containers/storage/pkg/reexec"
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"github.com/kubernetes-incubator/cri-o/server"
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"github.com/opencontainers/selinux/go-selinux"
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"github.com/urfave/cli"
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"google.golang.org/grpc"
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"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
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)
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const crioConfigPath = "/etc/crio/crio.conf"
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func mergeConfig(config *server.Config, ctx *cli.Context) error {
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// Don't parse the config if the user explicitly set it to "".
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if path := ctx.GlobalString("config"); path != "" {
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if err := config.FromFile(path); err != nil {
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if ctx.GlobalIsSet("config") || !os.IsNotExist(err) {
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return err
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}
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// We don't error out if --config wasn't explicitly set and the
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// default doesn't exist. But we will log a warning about it, so
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// the user doesn't miss it.
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logrus.Warnf("default configuration file does not exist: %s", crioConfigPath)
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}
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}
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// Override options set with the CLI.
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if ctx.GlobalIsSet("conmon") {
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config.Conmon = ctx.GlobalString("conmon")
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}
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if ctx.GlobalIsSet("pause-command") {
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config.PauseCommand = ctx.GlobalString("pause-command")
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}
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if ctx.GlobalIsSet("pause-image") {
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config.PauseImage = ctx.GlobalString("pause-image")
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}
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if ctx.GlobalIsSet("signature-policy") {
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config.SignaturePolicyPath = ctx.GlobalString("signature-policy")
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}
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if ctx.GlobalIsSet("root") {
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config.Root = ctx.GlobalString("root")
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}
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if ctx.GlobalIsSet("runroot") {
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config.RunRoot = ctx.GlobalString("runroot")
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}
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if ctx.GlobalIsSet("storage-driver") {
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config.Storage = ctx.GlobalString("storage-driver")
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}
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if ctx.GlobalIsSet("storage-opt") {
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config.StorageOptions = ctx.GlobalStringSlice("storage-opt")
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}
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if ctx.GlobalIsSet("default-transport") {
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config.DefaultTransport = ctx.GlobalString("default-transport")
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}
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if ctx.GlobalIsSet("listen") {
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config.Listen = ctx.GlobalString("listen")
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}
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if ctx.GlobalIsSet("runtime") {
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config.Runtime = ctx.GlobalString("runtime")
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}
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if ctx.GlobalIsSet("selinux") {
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config.SELinux = ctx.GlobalBool("selinux")
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}
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if ctx.GlobalIsSet("seccomp-profile") {
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config.SeccompProfile = ctx.GlobalString("seccomp-profile")
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}
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if ctx.GlobalIsSet("apparmor-profile") {
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config.ApparmorProfile = ctx.GlobalString("apparmor-profile")
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}
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if ctx.GlobalIsSet("cgroup-manager") {
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config.CgroupManager = ctx.GlobalString("cgroup-manager")
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}
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if ctx.GlobalIsSet("cni-config-dir") {
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config.NetworkDir = ctx.GlobalString("cni-config-dir")
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}
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if ctx.GlobalIsSet("cni-plugin-dir") {
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config.PluginDir = ctx.GlobalString("cni-plugin-dir")
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}
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return nil
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}
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func catchShutdown(gserver *grpc.Server, sserver *server.Server, signalled *bool) {
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sig := make(chan os.Signal, 10)
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signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM)
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go func() {
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for s := range sig {
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switch s {
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case syscall.SIGINT:
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logrus.Debugf("Caught SIGINT")
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case syscall.SIGTERM:
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logrus.Debugf("Caught SIGTERM")
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default:
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continue
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}
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*signalled = true
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gserver.GracefulStop()
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return
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}
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}()
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}
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func main() {
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if reexec.Init() {
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return
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}
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app := cli.NewApp()
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app.Name = "crio"
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app.Usage = "crio server"
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app.Version = "0.3"
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app.Metadata = map[string]interface{}{
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"config": server.DefaultConfig(),
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}
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app.Flags = []cli.Flag{
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cli.StringFlag{
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Name: "config",
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Value: crioConfigPath,
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Usage: "path to configuration file",
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},
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cli.StringFlag{
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Name: "conmon",
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Usage: "path to the conmon executable",
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},
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cli.BoolFlag{
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Name: "debug",
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Usage: "enable debug output for logging",
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},
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cli.StringFlag{
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Name: "listen",
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Usage: "path to crio socket",
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},
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cli.StringFlag{
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Name: "log",
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Value: "",
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Usage: "set the log file path where internal debug information is written",
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},
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cli.StringFlag{
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Name: "log-format",
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Value: "text",
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Usage: "set the format used by logs ('text' (default), or 'json')",
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},
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cli.StringFlag{
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Name: "pause-command",
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Usage: "name of the pause command in the pause image",
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},
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cli.StringFlag{
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Name: "pause-image",
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Usage: "name of the pause image",
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},
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cli.StringFlag{
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Name: "signature-policy",
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Usage: "path to signature policy file",
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},
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cli.StringFlag{
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Name: "root",
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Usage: "crio root dir",
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},
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cli.StringFlag{
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Name: "runroot",
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Usage: "crio state dir",
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},
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cli.StringFlag{
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Name: "storage-driver",
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Usage: "storage driver",
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},
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cli.StringSliceFlag{
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Name: "storage-opt",
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Usage: "storage driver option",
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},
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cli.StringFlag{
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Name: "default-transport",
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Usage: "default transport",
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},
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cli.StringFlag{
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Name: "runtime",
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Usage: "OCI runtime path",
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},
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cli.StringFlag{
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Name: "seccomp-profile",
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Usage: "default seccomp profile path",
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},
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cli.StringFlag{
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Name: "apparmor-profile",
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Usage: "default apparmor profile name (default: \"crio-default\")",
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},
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cli.BoolFlag{
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Name: "selinux",
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Usage: "enable selinux support",
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},
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cli.StringFlag{
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Name: "cgroup-manager",
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Usage: "cgroup manager (cgroupfs or systemd)",
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},
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cli.StringFlag{
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Name: "cni-config-dir",
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Usage: "CNI configuration files directory",
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},
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cli.StringFlag{
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Name: "cni-plugin-dir",
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Usage: "CNI plugin binaries directory",
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},
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cli.StringFlag{
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Name: "cpu-profile",
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Usage: "set the CPU profile file path",
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},
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}
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sort.Sort(cli.FlagsByName(app.Flags))
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sort.Sort(cli.FlagsByName(configCommand.Flags))
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app.Commands = []cli.Command{
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configCommand,
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}
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app.Before = func(c *cli.Context) error {
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// Load the configuration file.
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config := c.App.Metadata["config"].(*server.Config)
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if err := mergeConfig(config, c); err != nil {
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return err
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}
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cf := &logrus.TextFormatter{
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TimestampFormat: "2006-01-02 15:04:05.000000000Z07:00",
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FullTimestamp: true,
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}
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logrus.SetFormatter(cf)
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if c.GlobalBool("debug") {
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logrus.SetLevel(logrus.DebugLevel)
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}
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if path := c.GlobalString("log"); path != "" {
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f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY|os.O_APPEND|os.O_SYNC, 0666)
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if err != nil {
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return err
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}
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logrus.SetOutput(f)
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}
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switch c.GlobalString("log-format") {
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case "text":
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// retain logrus's default.
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case "json":
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logrus.SetFormatter(new(logrus.JSONFormatter))
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default:
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return fmt.Errorf("unknown log-format %q", c.GlobalString("log-format"))
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}
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return nil
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}
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app.Action = func(c *cli.Context) error {
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if cp := c.GlobalString("cpu-profile"); cp != "" {
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f, err := os.Create(cp)
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if err != nil {
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return fmt.Errorf("invalid --cpu-profile value %q", err)
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}
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pprof.StartCPUProfile(f)
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defer pprof.StopCPUProfile()
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}
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config := c.App.Metadata["config"].(*server.Config)
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if !config.SELinux {
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selinux.SetDisabled()
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}
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if _, err := os.Stat(config.Runtime); os.IsNotExist(err) {
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// path to runtime does not exist
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return fmt.Errorf("invalid --runtime value %q", err)
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}
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// Remove the socket if it already exists
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if _, err := os.Stat(config.Listen); err == nil {
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if err := os.Remove(config.Listen); err != nil {
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logrus.Fatal(err)
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}
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}
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lis, err := net.Listen("unix", config.Listen)
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if err != nil {
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logrus.Fatalf("failed to listen: %v", err)
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}
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s := grpc.NewServer()
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service, err := server.New(config)
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if err != nil {
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logrus.Fatal(err)
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}
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graceful := false
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catchShutdown(s, service, &graceful)
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runtime.RegisterRuntimeServiceServer(s, service)
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runtime.RegisterImageServiceServer(s, service)
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// after the daemon is done setting up we can notify systemd api
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notifySystem()
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err = s.Serve(lis)
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if graceful && strings.Contains(strings.ToLower(err.Error()), "use of closed network connection") {
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err = nil
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}
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if err2 := service.Shutdown(); err2 != nil {
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logrus.Infof("error shutting down layer storage: %v", err2)
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}
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if err != nil {
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logrus.Fatal(err)
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}
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return nil
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}
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if err := app.Run(os.Args); err != nil {
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logrus.Fatal(err)
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}
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}
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