mirror of https://github.com/k3s-io/k3s
239 lines
6.6 KiB
Go
239 lines
6.6 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package crictl
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import (
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"fmt"
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"os"
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"path/filepath"
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"sort"
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"time"
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"github.com/sirupsen/logrus"
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"github.com/urfave/cli"
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"google.golang.org/grpc"
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internalapi "k8s.io/cri-api/pkg/apis"
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"k8s.io/kubernetes/pkg/kubelet/remote"
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"k8s.io/kubernetes/pkg/kubelet/util"
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"github.com/kubernetes-sigs/cri-tools/pkg/version"
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)
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const (
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defaultTimeout = 2 * time.Second
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)
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var (
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// RuntimeEndpoint is CRI server runtime endpoint
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RuntimeEndpoint string
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// ImageEndpoint is CRI server image endpoint, default same as runtime endpoint
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ImageEndpoint string
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// Timeout of connecting to server (default: 10s)
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Timeout time.Duration
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// Debug enable debug output
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Debug bool
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)
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func getRuntimeClientConnection(context *cli.Context) (*grpc.ClientConn, error) {
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if RuntimeEndpoint == "" {
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return nil, fmt.Errorf("--runtime-endpoint is not set")
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}
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addr, dialer, err := util.GetAddressAndDialer(RuntimeEndpoint)
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if err != nil {
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return nil, err
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}
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conn, err := grpc.Dial(addr, grpc.WithInsecure(), grpc.WithBlock(), grpc.WithTimeout(Timeout), grpc.WithDialer(dialer))
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if err != nil {
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return nil, fmt.Errorf("failed to connect, make sure you are running as root and the runtime has been started: %v", err)
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}
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return conn, nil
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}
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func getImageClientConnection(context *cli.Context) (*grpc.ClientConn, error) {
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if ImageEndpoint == "" {
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if RuntimeEndpoint == "" {
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return nil, fmt.Errorf("--image-endpoint is not set")
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}
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ImageEndpoint = RuntimeEndpoint
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}
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addr, dialer, err := util.GetAddressAndDialer(ImageEndpoint)
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if err != nil {
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return nil, err
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}
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conn, err := grpc.Dial(addr, grpc.WithInsecure(), grpc.WithBlock(), grpc.WithTimeout(Timeout), grpc.WithDialer(dialer))
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if err != nil {
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return nil, fmt.Errorf("failed to connect, make sure you are running as root and the runtime has been started: %v", err)
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}
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return conn, nil
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}
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func getRuntimeService(context *cli.Context) (internalapi.RuntimeService, error) {
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return remote.NewRemoteRuntimeService(RuntimeEndpoint, Timeout)
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}
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func Main() {
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app := cli.NewApp()
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app.Name = "crictl"
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app.Usage = "client for CRI"
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app.Version = version.Version
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app.Commands = []cli.Command{
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runtimeAttachCommand,
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createContainerCommand,
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runtimeExecCommand,
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runtimeVersionCommand,
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listImageCommand,
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containerStatusCommand,
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imageStatusCommand,
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imageFsInfoCommand,
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podStatusCommand,
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logsCommand,
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runtimePortForwardCommand,
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listContainersCommand,
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pullImageCommand,
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runContainerCommand,
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runPodCommand,
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removeContainerCommand,
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removeImageCommand,
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removePodCommand,
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listPodCommand,
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startContainerCommand,
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runtimeStatusCommand,
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stopContainerCommand,
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stopPodCommand,
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updateContainerCommand,
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configCommand,
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statsCommand,
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completionCommand,
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}
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app.Flags = []cli.Flag{
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cli.StringFlag{
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Name: "config, c",
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EnvVar: "CRI_CONFIG_FILE",
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Value: defaultConfigPath,
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Usage: "Location of the client config file. If not specified and the default does not exist, the program's directory is searched as well",
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TakesFile: true,
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},
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cli.StringFlag{
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Name: "runtime-endpoint, r",
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EnvVar: "CONTAINER_RUNTIME_ENDPOINT",
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Value: defaultRuntimeEndpoint,
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Usage: "Endpoint of CRI container runtime service",
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},
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cli.StringFlag{
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Name: "image-endpoint, i",
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EnvVar: "IMAGE_SERVICE_ENDPOINT",
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Usage: "Endpoint of CRI image manager service",
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},
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cli.DurationFlag{
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Name: "timeout, t",
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Value: defaultTimeout,
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Usage: "Timeout of connecting to the server",
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},
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cli.BoolFlag{
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Name: "debug, D",
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Usage: "Enable debug mode",
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},
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}
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app.Before = func(context *cli.Context) error {
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isUseConfig := false
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configFile := context.GlobalString("config")
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if _, err := os.Stat(configFile); err == nil {
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isUseConfig = true
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} else {
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if context.IsSet("config") || !os.IsNotExist(err) {
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// note: the absence of default config file is normal case
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// when user have not set it in cli
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logrus.Fatalf("Failed to load config file: %v", err)
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} else {
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// If the default config was not found, and the user didn't
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// explicitly specify a config, try looking in the program's
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// directory as a fallback. This is a convenience for
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// deployments of crictl so they don't have to place a file in a
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// global location.
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configFile = filepath.Join(filepath.Dir(os.Args[0]), "crictl.yaml")
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if _, err := os.Stat(configFile); err == nil {
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isUseConfig = true
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} else if !os.IsNotExist(err) {
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logrus.Fatalf("Failed to load config file: %v", err)
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}
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}
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}
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if !isUseConfig {
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RuntimeEndpoint = context.GlobalString("runtime-endpoint")
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ImageEndpoint = context.GlobalString("image-endpoint")
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Timeout = context.GlobalDuration("timeout")
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Debug = context.GlobalBool("debug")
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} else {
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// Get config from file.
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config, err := ReadConfig(configFile)
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if err != nil {
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logrus.Fatalf("Falied to load config file: %v", err)
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}
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// Command line flags overrides config file.
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if context.IsSet("runtime-endpoint") {
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RuntimeEndpoint = context.String("runtime-endpoint")
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} else if config.RuntimeEndpoint != "" {
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RuntimeEndpoint = config.RuntimeEndpoint
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} else {
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RuntimeEndpoint = context.GlobalString("runtime-endpoint")
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}
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if context.IsSet("image-endpoint") {
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ImageEndpoint = context.String("image-endpoint")
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} else if config.ImageEndpoint != "" {
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ImageEndpoint = config.ImageEndpoint
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} else {
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ImageEndpoint = context.GlobalString("image-endpoint")
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}
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if context.IsSet("timeout") {
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Timeout = context.Duration("timeout")
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} else if config.Timeout != 0 {
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Timeout = time.Duration(config.Timeout) * time.Second
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} else {
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Timeout = context.GlobalDuration("timeout")
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}
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if context.IsSet("debug") {
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Debug = context.GlobalBool("debug")
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} else {
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Debug = config.Debug
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}
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}
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if Debug {
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logrus.SetLevel(logrus.DebugLevel)
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}
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return nil
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}
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// sort all flags
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for _, cmd := range app.Commands {
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sort.Sort(cli.FlagsByName(cmd.Flags))
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}
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sort.Sort(cli.FlagsByName(app.Flags))
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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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