forked from rubrikinc/kronos
/
status.go
251 lines (230 loc) · 5.52 KB
/
status.go
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package cli
import (
"context"
"encoding/json"
"flag"
"fmt"
"io"
"os"
"strings"
"text/tabwriter"
"time"
"github.com/cockroachdb/cockroach/pkg/util/log/logflags"
"github.com/spf13/cobra"
"github.com/rubrikinc/kronos/kronosutil"
"github.com/rubrikinc/kronos/kronosutil/log"
)
const (
timeoutFlag = "timeout"
formatFlag = "format"
)
var statusCtx struct {
timeout time.Duration
format string
all bool
}
var statusCmd = &cobra.Command{
Use: "status",
Short: "Status of kronos node(s)",
Long: `
Takes a comma-separated list of host:port and returns the status and time
server information for them.
`,
Run: func(cmd *cobra.Command, args []string) {
runStatus()
},
}
func init() {
addHostsFlags(statusCmd)
statusCmd.Flags().StringVar(
&statusCtx.format,
formatFlag,
"pretty",
"format to print status in. Supported values are: json, pretty",
)
statusCmd.Flags().DurationVar(
&statusCtx.timeout,
timeoutFlag,
30*time.Second,
"timeout for the command",
)
statusCmd.Flags().BoolVar(
&statusCtx.all,
"all",
false,
"show all fields in status",
)
}
func runStatus() {
ctx := context.Background()
if err := flag.Lookup(logflags.LogToStderrName).Value.Set("false"); err != nil {
panic(err)
}
if statusCtx.timeout != 0 {
var cancelCtx func()
ctx, cancelCtx = context.WithTimeout(context.Background(), statusCtx.timeout)
defer cancelCtx()
}
nodes, err := fetchRaftNodes(ctx)
if err != nil {
log.Fatal(ctx, err)
}
stores := nodeInfoFetcher{time: true, status: true}.fetch(ctx, nodes)
numErrors := 0
for _, store := range stores {
if store.Err != nil {
numErrors++
}
}
switch statusCtx.format {
case "pretty":
if err := prettyPrintStatus(os.Stdout, os.Stderr, stores, statusCtx.all); err != nil {
log.Fatal(ctx, err)
}
case "json":
serialized, err := json.MarshalIndent(stores, "", " ")
if err != nil {
log.Fatalf(ctx, "Couldn't serialize status: %v", stores)
}
fmt.Println(string(serialized))
default:
log.Fatalf(ctx, "format %s not supported for status", statusCtx.format)
}
if numErrors != 0 {
os.Exit(1)
}
}
const (
raftIDHeader = "Raft ID"
raftAddrHeader = "Raft Address"
grpcAddrHeader = "GRPC Address"
serverStatusHeader = "Server Status"
oracleAddrHeader = "Oracle Address"
oracleIDHeader = "Oracle Id"
timeCapHeader = "Time Cap"
deltaHeader = "Delta"
timeHeader = "Time"
)
func prettyPrintStatus(
outputStream io.Writer, errorStream io.Writer, stores []*NodeInfo, allFields bool,
) error {
const noValue = "N/A"
valueFn := map[string]func(n *NodeInfo) string{
raftIDHeader: func(n *NodeInfo) string { return n.ID },
raftAddrHeader: func(n *NodeInfo) string { return kronosutil.NodeAddrToString(n.RaftAddr) },
grpcAddrHeader: func(n *NodeInfo) string {
if n.getError(grpcAddrErrTag) != nil {
return noValue
}
return kronosutil.NodeAddrToString(n.GRPCAddr)
},
serverStatusHeader: func(n *NodeInfo) string {
if n.getError(grpcAddrErrTag) != nil || n.getError(statusErrTag) != nil {
return noValue
}
return fmt.Sprint(n.ServerStatus)
},
oracleAddrHeader: func(n *NodeInfo) string {
if n.getError(grpcAddrErrTag) != nil || n.getError(statusErrTag) != nil {
return noValue
}
return kronosutil.NodeAddrToString(n.OracleState.Oracle)
},
oracleIDHeader: func(n *NodeInfo) string {
if n.getError(grpcAddrErrTag) != nil || n.getError(statusErrTag) != nil {
return noValue
}
return fmt.Sprint(n.OracleState.Id)
},
timeCapHeader: func(n *NodeInfo) string {
if n.getError(grpcAddrErrTag) != nil || n.getError(statusErrTag) != nil {
return noValue
}
return fmt.Sprint(n.OracleState.TimeCap)
},
deltaHeader: func(n *NodeInfo) string {
if n.getError(grpcAddrErrTag) != nil || n.getError(statusErrTag) != nil {
return noValue
}
return fmt.Sprint(time.Duration(n.Delta))
},
timeHeader: func(n *NodeInfo) string {
if n.getError(grpcAddrErrTag) != nil || n.getError(timeErrTag) != nil {
return noValue
}
return fmt.Sprint(n.Time)
},
}
tw := tabwriter.NewWriter(
outputStream,
2, /* minWidth */
2, /* tabWidth */
2, /* padding */
' ', /* padChar */
0, /* flags */
)
var fields []string
if allFields {
fields = []string{
raftIDHeader,
raftAddrHeader,
grpcAddrHeader,
serverStatusHeader,
oracleAddrHeader,
oracleIDHeader,
timeCapHeader,
deltaHeader,
timeHeader,
}
} else {
fields = []string{
raftIDHeader,
grpcAddrHeader,
serverStatusHeader,
oracleAddrHeader,
deltaHeader,
}
}
// generate format
repeat := func(s string, n int) (rep []string) {
for ; n > 0; n-- {
rep = append(rep, s)
}
return
}
// format is %s\t%s\t....%s\n where %s comes len(fields) times
format := strings.Join(repeat("%s", len(fields)), "\t") + "\n"
row := make([]interface{}, len(fields))
// write Headers
for i := range fields {
row[i] = fields[i]
}
fmt.Fprintf(tw, format, row...)
// write Statuses
for _, store := range stores {
for i, field := range fields {
row[i] = valueFn[field](store)
}
fmt.Fprintf(tw, format, row...)
}
if err := tw.Flush(); err != nil {
return err
}
// write Errors
tags := []string{grpcAddrErrTag, statusErrTag, timeErrTag}
for _, store := range stores {
raftAddr := kronosutil.NodeAddrToString(store.RaftAddr)
for _, tag := range tags {
if err := store.getError(tag); err != nil {
fmt.Fprintf(
errorStream,
"%s Error: Couldn't fetch kronos %s due to err: %s\n",
raftAddr,
tag,
err,
)
}
}
}
return nil
}