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43221f0b7a
endpoint-health checks endpoint. It can generate 3 outputs: 1. cannot connect to the member through endpoint 2. connected to the member, but member failed to commit any proposals 3. connected to the member, and member committed a proposal
81 lines
2.3 KiB
Go
81 lines
2.3 KiB
Go
// Copyright 2015 CoreOS, Inc.
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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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"fmt"
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"sync"
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"time"
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"github.com/coreos/etcd/Godeps/_workspace/src/github.com/spf13/cobra"
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"github.com/coreos/etcd/Godeps/_workspace/src/golang.org/x/net/context"
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"github.com/coreos/etcd/clientv3"
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)
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// NewEpHealthCommand returns the cobra command for "endpoint-health".
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func NewEpHealthCommand() *cobra.Command {
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cmd := &cobra.Command{
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Use: "endpoint-health",
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Short: "endpoint-health checks the healthiness of endpoints specified in `--endpoints` flag",
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Run: epHealthCommandFunc,
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}
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return cmd
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}
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// epHealthCommandFunc executes the "endpoint-health" command.
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func epHealthCommandFunc(cmd *cobra.Command, args []string) {
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endpoints, err := cmd.Flags().GetStringSlice("endpoints")
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if err != nil {
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ExitWithError(ExitError, err)
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}
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cert, key, cacert := keyAndCertFromCmd(cmd)
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dt := dialTimeoutFromCmd(cmd)
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cfgs := []*clientv3.Config{}
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for _, ep := range endpoints {
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cfg, err := newClientCfg([]string{ep}, dt, cert, key, cacert)
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if err != nil {
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ExitWithError(ExitBadArgs, err)
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}
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cfgs = append(cfgs, cfg)
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}
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var wg sync.WaitGroup
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for _, cfg := range cfgs {
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wg.Add(1)
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go func(cfg *clientv3.Config) {
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defer wg.Done()
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ep := cfg.Endpoints[0]
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cli, err := clientv3.New(*cfg)
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if err != nil {
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fmt.Printf("%s is unhealthy: failed to connect: %v\n", ep, err)
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return
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}
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st := time.Now()
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// get a random key. As long as we can get the response without an error, the
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// endpoint is health.
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_, err = cli.Get(context.TODO(), "health")
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if err != nil {
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fmt.Printf("%s is unhealthy: failed to commit proposal: %v\n", ep, err)
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} else {
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fmt.Printf("%s is healthy: successfully committed proposal: took = %v\n", ep, time.Since(st))
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}
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}(cfg)
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}
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wg.Wait()
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}
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