k3s/pkg/cli/etcdsnapshot/etcd_snapshot.go

267 lines
6.8 KiB
Go

package etcdsnapshot
import (
"encoding/json"
"errors"
"fmt"
"os"
"path/filepath"
"strings"
"text/tabwriter"
"time"
"github.com/erikdubbelboer/gspt"
"github.com/k3s-io/k3s/pkg/cli/cmds"
"github.com/k3s-io/k3s/pkg/cluster"
"github.com/k3s-io/k3s/pkg/daemons/config"
"github.com/k3s-io/k3s/pkg/etcd"
"github.com/k3s-io/k3s/pkg/server"
util2 "github.com/k3s-io/k3s/pkg/util"
"github.com/rancher/wrangler/pkg/signals"
"github.com/urfave/cli"
"gopkg.in/yaml.v2"
)
// commandSetup setups up common things needed
// for each etcd command.
func commandSetup(app *cli.Context, cfg *cmds.Server, sc *server.Config) error {
gspt.SetProcTitle(os.Args[0])
nodeName := app.String("node-name")
if nodeName == "" {
h, err := os.Hostname()
if err != nil {
return err
}
nodeName = h
}
os.Setenv("NODE_NAME", nodeName)
dataDir, err := server.ResolveDataDir(cfg.DataDir)
if err != nil {
return err
}
sc.DisableAgent = true
sc.ControlConfig.DataDir = dataDir
sc.ControlConfig.EtcdSnapshotName = cfg.EtcdSnapshotName
sc.ControlConfig.EtcdSnapshotDir = cfg.EtcdSnapshotDir
sc.ControlConfig.EtcdSnapshotCompress = cfg.EtcdSnapshotCompress
sc.ControlConfig.EtcdListFormat = strings.ToLower(cfg.EtcdListFormat)
sc.ControlConfig.EtcdS3 = cfg.EtcdS3
sc.ControlConfig.EtcdS3Endpoint = cfg.EtcdS3Endpoint
sc.ControlConfig.EtcdS3EndpointCA = cfg.EtcdS3EndpointCA
sc.ControlConfig.EtcdS3SkipSSLVerify = cfg.EtcdS3SkipSSLVerify
sc.ControlConfig.EtcdS3AccessKey = cfg.EtcdS3AccessKey
sc.ControlConfig.EtcdS3SecretKey = cfg.EtcdS3SecretKey
sc.ControlConfig.EtcdS3BucketName = cfg.EtcdS3BucketName
sc.ControlConfig.EtcdS3Region = cfg.EtcdS3Region
sc.ControlConfig.EtcdS3Folder = cfg.EtcdS3Folder
sc.ControlConfig.EtcdS3Insecure = cfg.EtcdS3Insecure
sc.ControlConfig.EtcdS3Timeout = cfg.EtcdS3Timeout
sc.ControlConfig.Runtime = &config.ControlRuntime{}
sc.ControlConfig.Runtime.ETCDServerCA = filepath.Join(dataDir, "tls", "etcd", "server-ca.crt")
sc.ControlConfig.Runtime.ClientETCDCert = filepath.Join(dataDir, "tls", "etcd", "client.crt")
sc.ControlConfig.Runtime.ClientETCDKey = filepath.Join(dataDir, "tls", "etcd", "client.key")
sc.ControlConfig.Runtime.KubeConfigAdmin = filepath.Join(dataDir, "cred", "admin.kubeconfig")
return nil
}
// Run was an alias for Save
func Run(app *cli.Context) error {
cli.ShowAppHelp(app)
return fmt.Errorf("saving with etcd-snapshot was deprecated in v1.26, use \"etcd-snapshot save\" instead")
}
// Save triggers an on-demand etcd snapshot operation
func Save(app *cli.Context) error {
if err := cmds.InitLogging(); err != nil {
return err
}
return save(app, &cmds.ServerConfig)
}
func save(app *cli.Context, cfg *cmds.Server) error {
var serverConfig server.Config
if err := commandSetup(app, cfg, &serverConfig); err != nil {
return err
}
if len(app.Args()) > 0 {
return util2.ErrCommandNoArgs
}
serverConfig.ControlConfig.EtcdSnapshotRetention = 0 // disable retention check
ctx := signals.SetupSignalContext()
e := etcd.NewETCD()
if err := e.SetControlConfig(ctx, &serverConfig.ControlConfig); err != nil {
return err
}
initialized, err := e.IsInitialized(ctx, &serverConfig.ControlConfig)
if err != nil {
return err
}
if !initialized {
return fmt.Errorf("etcd database not found in %s", serverConfig.ControlConfig.DataDir)
}
cluster := cluster.New(&serverConfig.ControlConfig)
if err := cluster.Bootstrap(ctx, true); err != nil {
return err
}
sc, err := server.NewContext(ctx, serverConfig.ControlConfig.Runtime.KubeConfigAdmin)
if err != nil {
return err
}
serverConfig.ControlConfig.Runtime.Core = sc.Core
return cluster.Snapshot(ctx, &serverConfig.ControlConfig)
}
func Delete(app *cli.Context) error {
if err := cmds.InitLogging(); err != nil {
return err
}
return delete(app, &cmds.ServerConfig)
}
func delete(app *cli.Context, cfg *cmds.Server) error {
var serverConfig server.Config
if err := commandSetup(app, cfg, &serverConfig); err != nil {
return err
}
snapshots := app.Args()
if len(snapshots) == 0 {
return errors.New("no snapshots given for removal")
}
ctx := signals.SetupSignalContext()
e := etcd.NewETCD()
if err := e.SetControlConfig(ctx, &serverConfig.ControlConfig); err != nil {
return err
}
sc, err := server.NewContext(ctx, serverConfig.ControlConfig.Runtime.KubeConfigAdmin)
if err != nil {
return err
}
serverConfig.ControlConfig.Runtime.Core = sc.Core
return e.DeleteSnapshots(ctx, app.Args())
}
func List(app *cli.Context) error {
if err := cmds.InitLogging(); err != nil {
return err
}
return list(app, &cmds.ServerConfig)
}
var etcdListFormats = []string{"json", "yaml"}
func validEtcdListFormat(format string) bool {
for _, supportedFormat := range etcdListFormats {
if format == supportedFormat {
return true
}
}
return false
}
func list(app *cli.Context, cfg *cmds.Server) error {
var serverConfig server.Config
if err := commandSetup(app, cfg, &serverConfig); err != nil {
return err
}
ctx := signals.SetupSignalContext()
e := etcd.NewETCD()
if err := e.SetControlConfig(ctx, &serverConfig.ControlConfig); err != nil {
return err
}
sf, err := e.ListSnapshots(ctx)
if err != nil {
return err
}
if cfg.EtcdListFormat != "" && !validEtcdListFormat(cfg.EtcdListFormat) {
return errors.New("invalid output format: " + cfg.EtcdListFormat)
}
switch cfg.EtcdListFormat {
case "json":
if err := json.NewEncoder(os.Stdout).Encode(sf); err != nil {
return err
}
return nil
case "yaml":
if err := yaml.NewEncoder(os.Stdout).Encode(sf); err != nil {
return err
}
return nil
default:
w := tabwriter.NewWriter(os.Stdout, 0, 0, 1, ' ', 0)
defer w.Flush()
if cfg.EtcdS3 {
fmt.Fprint(w, "Name\tSize\tCreated\n")
for _, s := range sf {
if s.NodeName == "s3" {
fmt.Fprintf(w, "%s\t%d\t%s\n", s.Name, s.Size, s.CreatedAt.Format(time.RFC3339))
}
}
} else {
fmt.Fprint(w, "Name\tLocation\tSize\tCreated\n")
for _, s := range sf {
if s.NodeName != "s3" {
fmt.Fprintf(w, "%s\t%s\t%d\t%s\n", s.Name, s.Location, s.Size, s.CreatedAt.Format(time.RFC3339))
}
}
}
}
return nil
}
func Prune(app *cli.Context) error {
if err := cmds.InitLogging(); err != nil {
return err
}
return prune(app, &cmds.ServerConfig)
}
func prune(app *cli.Context, cfg *cmds.Server) error {
var serverConfig server.Config
if err := commandSetup(app, cfg, &serverConfig); err != nil {
return err
}
serverConfig.ControlConfig.EtcdSnapshotRetention = cfg.EtcdSnapshotRetention
ctx := signals.SetupSignalContext()
e := etcd.NewETCD()
if err := e.SetControlConfig(ctx, &serverConfig.ControlConfig); err != nil {
return err
}
sc, err := server.NewContext(ctx, serverConfig.ControlConfig.Runtime.KubeConfigAdmin)
if err != nil {
return err
}
serverConfig.ControlConfig.Runtime.Core = sc.Core
return e.PruneSnapshots(ctx)
}