forked from etcd-io/etcd
/
lease_command.go
136 lines (111 loc) · 3.72 KB
/
lease_command.go
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// Copyright 2016 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package command
import (
"fmt"
"strconv"
v3 "github.com/coreos/etcd/clientv3"
"github.com/spf13/cobra"
"golang.org/x/net/context"
)
// NewLeaseCommand returns the cobra command for "lease".
func NewLeaseCommand() *cobra.Command {
lc := &cobra.Command{
Use: "lease <subcommand>",
Short: "Lease related commands",
}
lc.AddCommand(NewLeaseGrantCommand())
lc.AddCommand(NewLeaseRevokeCommand())
lc.AddCommand(NewLeaseKeepAliveCommand())
return lc
}
// NewLeaseGrantCommand returns the cobra command for "lease grant".
func NewLeaseGrantCommand() *cobra.Command {
lc := &cobra.Command{
Use: "grant <ttl>",
Short: "Creates leases",
Run: leaseGrantCommandFunc,
}
return lc
}
// leaseGrantCommandFunc executes the "lease grant" command.
func leaseGrantCommandFunc(cmd *cobra.Command, args []string) {
if len(args) != 1 {
ExitWithError(ExitBadArgs, fmt.Errorf("lease grant command needs TTL argument."))
}
ttl, err := strconv.ParseInt(args[0], 10, 64)
if err != nil {
ExitWithError(ExitBadArgs, fmt.Errorf("bad TTL (%v)", err))
}
ctx, cancel := commandCtx(cmd)
resp, err := mustClientFromCmd(cmd).Grant(ctx, ttl)
cancel()
if err != nil {
ExitWithError(ExitError, fmt.Errorf("failed to grant lease (%v)\n", err))
}
fmt.Printf("lease %016x granted with TTL(%ds)\n", resp.ID, resp.TTL)
}
// NewLeaseRevokeCommand returns the cobra command for "lease revoke".
func NewLeaseRevokeCommand() *cobra.Command {
lc := &cobra.Command{
Use: "revoke <leaseID>",
Short: "Revokes leases",
Run: leaseRevokeCommandFunc,
}
return lc
}
// leaseRevokeCommandFunc executes the "lease grant" command.
func leaseRevokeCommandFunc(cmd *cobra.Command, args []string) {
if len(args) != 1 {
ExitWithError(ExitBadArgs, fmt.Errorf("lease revoke command needs 1 argument"))
}
id, err := strconv.ParseInt(args[0], 16, 64)
if err != nil {
ExitWithError(ExitBadArgs, fmt.Errorf("bad lease ID arg (%v), expecting ID in Hex", err))
}
ctx, cancel := commandCtx(cmd)
_, err = mustClientFromCmd(cmd).Revoke(ctx, v3.LeaseID(id))
cancel()
if err != nil {
ExitWithError(ExitError, fmt.Errorf("failed to revoke lease (%v)\n", err))
}
fmt.Printf("lease %016x revoked\n", id)
}
// NewLeaseKeepAliveCommand returns the cobra command for "lease keep-alive".
func NewLeaseKeepAliveCommand() *cobra.Command {
lc := &cobra.Command{
Use: "keep-alive <leaseID>",
Short: "Keeps leases alive (renew)",
Run: leaseKeepAliveCommandFunc,
}
return lc
}
// leaseKeepAliveCommandFunc executes the "lease keep-alive" command.
func leaseKeepAliveCommandFunc(cmd *cobra.Command, args []string) {
if len(args) != 1 {
ExitWithError(ExitBadArgs, fmt.Errorf("lease keep-alive command needs lease ID as argument"))
}
id, err := strconv.ParseInt(args[0], 16, 64)
if err != nil {
ExitWithError(ExitBadArgs, fmt.Errorf("bad lease ID arg (%v), expecting ID in Hex", err))
}
respc, kerr := mustClientFromCmd(cmd).KeepAlive(context.TODO(), v3.LeaseID(id))
if kerr != nil {
ExitWithError(ExitBadConnection, kerr)
}
for resp := range respc {
fmt.Printf("lease %016x keepalived with TTL(%d)\n", resp.ID, resp.TTL)
}
fmt.Printf("lease %016x expired or revoked.\n", id)
}