543 lines
14 KiB
Go
543 lines
14 KiB
Go
package main
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import (
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"context"
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"fmt"
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"net"
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"net/http"
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_ "net/http/pprof"
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"os"
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"os/signal"
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"path/filepath"
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"sort"
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"strings"
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"time"
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"github.com/containers/storage/pkg/reexec"
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"github.com/kubernetes-incubator/cri-o/lib"
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"github.com/kubernetes-incubator/cri-o/server"
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"github.com/kubernetes-incubator/cri-o/version"
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"github.com/opencontainers/selinux/go-selinux"
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"github.com/sirupsen/logrus"
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"github.com/soheilhy/cmux"
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"github.com/urfave/cli"
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"golang.org/x/sys/unix"
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"google.golang.org/grpc"
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"k8s.io/kubernetes/pkg/kubelet/apis/cri/v1alpha1/runtime"
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)
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// gitCommit is the commit that the binary is being built from.
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// It will be populated by the Makefile.
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var gitCommit = ""
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func validateConfig(config *server.Config) error {
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switch config.ImageVolumes {
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case lib.ImageVolumesMkdir:
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case lib.ImageVolumesIgnore:
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case lib.ImageVolumesBind:
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default:
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return fmt.Errorf("Unrecognized image volume type specified")
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}
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// This needs to match the read buffer size in conmon
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if config.LogSizeMax >= 0 && config.LogSizeMax < 8192 {
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return fmt.Errorf("log size max should be negative or >= 8192")
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}
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return nil
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}
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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.UpdateFromFile(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", server.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("file-locking") {
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config.FileLocking = ctx.GlobalBool("file-locking")
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}
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if ctx.GlobalIsSet("insecure-registry") {
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config.InsecureRegistries = ctx.GlobalStringSlice("insecure-registry")
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}
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if ctx.GlobalIsSet("registry") {
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config.Registries = ctx.GlobalStringSlice("registry")
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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("stream-address") {
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config.StreamAddress = ctx.GlobalString("stream-address")
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}
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if ctx.GlobalIsSet("stream-port") {
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config.StreamPort = ctx.GlobalString("stream-port")
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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("hooks-dir-path") {
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config.HooksDirPath = ctx.GlobalString("hooks-dir-path")
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}
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if ctx.GlobalIsSet("default-mounts") {
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config.DefaultMounts = ctx.GlobalStringSlice("default-mounts")
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}
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if ctx.GlobalIsSet("pids-limit") {
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config.PidsLimit = ctx.GlobalInt64("pids-limit")
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}
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if ctx.GlobalIsSet("enable-shared-pid-namespace") {
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config.EnableSharedPIDNamespace = ctx.GlobalBool("enable-shared-pid-namespace")
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}
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if ctx.GlobalIsSet("log-size-max") {
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config.LogSizeMax = ctx.GlobalInt64("log-size-max")
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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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if ctx.GlobalIsSet("image-volumes") {
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config.ImageVolumes = lib.ImageVolumesType(ctx.GlobalString("image-volumes"))
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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, hserver *http.Server, signalled *bool) {
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sig := make(chan os.Signal, 10)
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signal.Notify(sig, unix.SIGINT, unix.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 unix.SIGINT:
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logrus.Debugf("Caught SIGINT")
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case unix.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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hserver.Shutdown(context.Background())
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sserver.StopStreamServer()
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sserver.StopMonitors()
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if err := sserver.Shutdown(); err != nil {
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logrus.Warnf("error shutting down main service %v", err)
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}
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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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var v []string
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v = append(v, version.Version)
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if gitCommit != "" {
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v = append(v, fmt.Sprintf("commit: %s", gitCommit))
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}
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app.Name = "crio"
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app.Usage = "crio server"
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app.Version = strings.Join(v, "\n")
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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: server.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.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: "stream-address",
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Usage: "bind address for streaming socket",
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},
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cli.StringFlag{
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Name: "stream-port",
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Usage: "bind port for streaming socket (default: \"10010\")",
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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: "log-level",
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Usage: "log messages above specified level: debug, info (default), warn, error, fatal or panic",
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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.BoolFlag{
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Name: "file-locking",
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Usage: "enable or disable file-based locking",
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},
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cli.StringSliceFlag{
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Name: "insecure-registry",
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Usage: "whether to disable TLS verification for the given registry",
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},
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cli.StringSliceFlag{
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Name: "registry",
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Usage: "registry to be prepended when pulling unqualified images, can be specified multiple times",
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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.Int64Flag{
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Name: "pids-limit",
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Value: lib.DefaultPidsLimit,
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Usage: "maximum number of processes allowed in a container",
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},
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cli.BoolFlag{
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Name: "enable-shared-pid-namespace",
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Usage: "enable using a shared PID namespace for containers in a pod",
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},
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cli.Int64Flag{
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Name: "log-size-max",
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Value: lib.DefaultLogSizeMax,
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Usage: "maximum log size in bytes for a container",
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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: "image-volumes",
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Value: string(lib.ImageVolumesMkdir),
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Usage: "image volume handling ('mkdir', 'bind', or 'ignore')",
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},
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cli.StringFlag{
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Name: "hooks-dir-path",
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Usage: "set the OCI hooks directory path",
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Value: lib.DefaultHooksDirPath,
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Hidden: true,
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},
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cli.StringSliceFlag{
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Name: "default-mounts",
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Usage: "add one or more default mount paths in the form host:container",
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Hidden: true,
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},
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cli.BoolFlag{
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Name: "profile",
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Usage: "enable pprof remote profiler on localhost:6060",
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},
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cli.IntFlag{
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Name: "profile-port",
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Value: 6060,
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Usage: "port for the pprof profiler",
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},
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cli.BoolFlag{
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Name: "enable-metrics",
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Usage: "enable metrics endpoint for the servier on localhost:9090",
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},
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cli.IntFlag{
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Name: "metrics-port",
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Value: 9090,
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Usage: "port for the metrics endpoint",
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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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if err := validateConfig(config); 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 loglevel := c.GlobalString("log-level"); loglevel != "" {
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level, err := logrus.ParseLevel(loglevel)
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if err != nil {
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return err
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}
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logrus.SetLevel(level)
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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 c.GlobalBool("profile") {
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profilePort := c.GlobalInt("profile-port")
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profileEndpoint := fmt.Sprintf("localhost:%v", profilePort)
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go func() {
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http.ListenAndServe(profileEndpoint, nil)
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}()
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}
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args := c.Args()
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if len(args) > 0 {
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for _, command := range app.Commands {
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if args[0] == command.Name {
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break
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}
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}
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return fmt.Errorf("command %q not supported", args[0])
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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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if err := os.MkdirAll(filepath.Dir(config.Listen), 0755); err != nil {
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return 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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if c.GlobalBool("enable-metrics") {
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metricsPort := c.GlobalInt("metrics-port")
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me, err := service.CreateMetricsEndpoint()
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if err != nil {
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logrus.Fatalf("Failed to create metrics endpoint: %v", err)
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}
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l, err := net.Listen("tcp", fmt.Sprintf(":%v", metricsPort))
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if err != nil {
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logrus.Fatalf("Failed to create listener for metrics: %v", err)
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}
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go func() {
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if err := http.Serve(l, me); err != nil {
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logrus.Fatalf("Failed to serve metrics endpoint: %v", err)
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}
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}()
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}
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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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go func() {
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service.StartExitMonitor()
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}()
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go func() {
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service.StartHooksMonitor()
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}()
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m := cmux.New(lis)
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grpcL := m.Match(cmux.HTTP2HeaderField("content-type", "application/grpc"))
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httpL := m.Match(cmux.HTTP1Fast())
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infoMux := service.GetInfoMux()
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srv := &http.Server{
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Handler: infoMux,
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ReadTimeout: 5 * time.Second,
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}
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graceful := false
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catchShutdown(s, service, srv, &graceful)
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go s.Serve(grpcL)
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go srv.Serve(httpL)
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serverCloseCh := make(chan struct{})
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go func() {
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defer close(serverCloseCh)
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if err := m.Serve(); err != nil {
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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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} else {
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logrus.Errorf("Failed to serve grpc request: %v", err)
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}
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}
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}()
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streamServerCloseCh := service.StreamingServerCloseChan()
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serverMonitorsCh := service.MonitorsCloseChan()
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select {
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case <-streamServerCloseCh:
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case <-serverMonitorsCh:
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case <-serverCloseCh:
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}
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service.Shutdown()
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<-streamServerCloseCh
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logrus.Debug("closed stream server")
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<-serverMonitorsCh
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logrus.Debug("closed monitors")
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<-serverCloseCh
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logrus.Debug("closed main server")
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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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