mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
87 lines
2.2 KiB
Go
87 lines
2.2 KiB
Go
// Copyright 2016 The etcd Authors
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package command
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import (
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"context"
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"errors"
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"fmt"
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"log"
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"time"
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"github.com/coreos/etcd/clientv3"
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"github.com/spf13/cobra"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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)
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// NewLeaseRenewerCommand returns the cobra command for "lease-renewer runner".
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func NewLeaseRenewerCommand() *cobra.Command {
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cmd := &cobra.Command{
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Use: "lease-renewer",
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Short: "Performs lease renew operation",
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Run: runLeaseRenewerFunc,
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}
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return cmd
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}
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func runLeaseRenewerFunc(cmd *cobra.Command, args []string) {
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if len(args) > 0 {
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ExitWithError(ExitBadArgs, errors.New("lease-renewer does not take any argument"))
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}
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eps := endpointsFromFlag(cmd)
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dialTimeout := dialTimeoutFromCmd(cmd)
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c := newClient(eps, dialTimeout)
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ctx := context.Background()
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for {
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var (
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l *clientv3.LeaseGrantResponse
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lk *clientv3.LeaseKeepAliveResponse
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err error
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)
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for {
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l, err = c.Lease.Grant(ctx, 5)
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if err == nil {
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break
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}
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}
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expire := time.Now().Add(time.Duration(l.TTL-1) * time.Second)
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for {
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lk, err = c.Lease.KeepAliveOnce(ctx, l.ID)
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if grpc.Code(err) == codes.NotFound {
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if time.Since(expire) < 0 {
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log.Printf("bad renew! exceeded: %v", time.Since(expire))
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for {
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lk, err = c.Lease.KeepAliveOnce(ctx, l.ID)
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fmt.Println(lk, err)
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time.Sleep(time.Second)
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}
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}
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log.Printf("lost lease %d, expire: %v\n", l.ID, expire)
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break
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}
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if err != nil {
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continue
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}
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expire = time.Now().Add(time.Duration(lk.TTL-1) * time.Second)
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log.Printf("renewed lease %d, expire: %v\n", lk.ID, expire)
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time.Sleep(time.Duration(lk.TTL-2) * time.Second)
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}
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}
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}
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