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etcd_snapshot.go
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etcd_snapshot.go
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package etcdsnapshot
import (
"context"
"encoding/json"
"errors"
"fmt"
"os"
"path/filepath"
"sort"
"strings"
"text/tabwriter"
"time"
"github.com/erikdubbelboer/gspt"
"github.com/rancher/wrangler/pkg/signals"
"github.com/urfave/cli"
"github.com/xiaods/k8e/pkg/cli/cmds"
daemonconfig "github.com/xiaods/k8e/pkg/daemons/config"
"github.com/xiaods/k8e/pkg/etcd"
"github.com/xiaods/k8e/pkg/server"
util2 "github.com/xiaods/k8e/pkg/util"
"gopkg.in/yaml.v2"
)
type etcdCommand struct {
etcd *etcd.ETCD
ctx context.Context
}
// commandSetup setups up common things needed
// for each etcd command.
func commandSetup(app *cli.Context, cfg *cmds.Server, config *server.Config) (*etcdCommand, error) {
ctx := signals.SetupSignalContext()
gspt.SetProcTitle(os.Args[0])
nodeName := app.String("node-name")
if nodeName == "" {
h, err := os.Hostname()
if err != nil {
return nil, err
}
nodeName = h
}
os.Setenv("NODE_NAME", nodeName)
dataDir, err := server.ResolveDataDir(cfg.DataDir)
if err != nil {
return nil, err
}
config.DisableAgent = true
config.ControlConfig.DataDir = dataDir
config.ControlConfig.EtcdSnapshotName = cfg.EtcdSnapshotName
config.ControlConfig.EtcdSnapshotDir = cfg.EtcdSnapshotDir
config.ControlConfig.EtcdSnapshotCompress = cfg.EtcdSnapshotCompress
config.ControlConfig.EtcdListFormat = strings.ToLower(cfg.EtcdListFormat)
config.ControlConfig.EtcdS3 = cfg.EtcdS3
config.ControlConfig.EtcdS3Endpoint = cfg.EtcdS3Endpoint
config.ControlConfig.EtcdS3EndpointCA = cfg.EtcdS3EndpointCA
config.ControlConfig.EtcdS3SkipSSLVerify = cfg.EtcdS3SkipSSLVerify
config.ControlConfig.EtcdS3AccessKey = cfg.EtcdS3AccessKey
config.ControlConfig.EtcdS3SecretKey = cfg.EtcdS3SecretKey
config.ControlConfig.EtcdS3BucketName = cfg.EtcdS3BucketName
config.ControlConfig.EtcdS3Region = cfg.EtcdS3Region
config.ControlConfig.EtcdS3Folder = cfg.EtcdS3Folder
config.ControlConfig.EtcdS3Insecure = cfg.EtcdS3Insecure
config.ControlConfig.EtcdS3Timeout = cfg.EtcdS3Timeout
config.ControlConfig.Runtime = daemonconfig.NewRuntime(nil)
config.ControlConfig.Runtime.ETCDServerCA = filepath.Join(dataDir, "tls", "etcd", "server-ca.crt")
config.ControlConfig.Runtime.ClientETCDCert = filepath.Join(dataDir, "tls", "etcd", "client.crt")
config.ControlConfig.Runtime.ClientETCDKey = filepath.Join(dataDir, "tls", "etcd", "client.key")
config.ControlConfig.Runtime.KubeConfigAdmin = filepath.Join(dataDir, "cred", "admin.kubeconfig")
e := etcd.NewETCD()
if err := e.SetControlConfig(&config.ControlConfig); err != nil {
return nil, err
}
initialized, err := e.IsInitialized()
if err != nil {
return nil, err
}
if !initialized {
return nil, fmt.Errorf("etcd database not found in %s", config.ControlConfig.DataDir)
}
sc, err := server.NewContext(ctx, config, false)
if err != nil {
return nil, err
}
config.ControlConfig.Runtime.K8e = sc.K8e
config.ControlConfig.Runtime.Core = sc.Core
return &etcdCommand{etcd: e, ctx: ctx}, nil
}
// Run is an alias for Save, retained for compatibility reasons.
func Run(app *cli.Context) error {
return Save(app)
}
// 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 len(app.Args()) > 0 {
return util2.ErrCommandNoArgs
}
ec, err := commandSetup(app, cfg, &serverConfig)
if err != nil {
return err
}
serverConfig.ControlConfig.EtcdSnapshotRetention = 0 // disable retention check
return ec.etcd.Snapshot(ec.ctx)
}
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
ec, err := commandSetup(app, cfg, &serverConfig)
if err != nil {
return err
}
snapshots := app.Args()
if len(snapshots) == 0 {
return errors.New("no snapshots given for removal")
}
return ec.etcd.DeleteSnapshots(ec.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", "table"}
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
ec, err := commandSetup(app, cfg, &serverConfig)
if err != nil {
return err
}
sf, err := ec.etcd.ListSnapshots(ec.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()
// Sort snapshots by creation time and key
sfKeys := make([]string, 0, len(sf))
for k := range sf {
sfKeys = append(sfKeys, k)
}
sort.Slice(sfKeys, func(i, j int) bool {
iKey := sfKeys[i]
jKey := sfKeys[j]
if sf[iKey].CreatedAt.Equal(sf[jKey].CreatedAt) {
return iKey < jKey
}
return sf[iKey].CreatedAt.Before(sf[jKey].CreatedAt)
})
fmt.Fprint(w, "Name\tLocation\tSize\tCreated\n")
for _, k := range sfKeys {
fmt.Fprintf(w, "%s\t%s\t%d\t%s\n", sf[k].Name, sf[k].Location, sf[k].Size, sf[k].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
ec, err := commandSetup(app, cfg, &serverConfig)
if err != nil {
return err
}
serverConfig.ControlConfig.EtcdSnapshotRetention = cfg.EtcdSnapshotRetention
return ec.etcd.PruneSnapshots(ec.ctx)
}