266 lines
6.2 KiB
Go
266 lines
6.2 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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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"net/url"
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"os"
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"strings"
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"github.com/coreos/etcd/Godeps/_workspace/src/github.com/bgentry/speakeasy"
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"github.com/coreos/etcd/Godeps/_workspace/src/github.com/codegangsta/cli"
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"github.com/coreos/etcd/Godeps/_workspace/src/golang.org/x/net/context"
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"github.com/coreos/etcd/client"
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"github.com/coreos/etcd/pkg/transport"
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)
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var (
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ErrNoAvailSrc = errors.New("no available argument and stdin")
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)
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// trimsplit slices s into all substrings separated by sep and returns a
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// slice of the substrings between the separator with all leading and trailing
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// white space removed, as defined by Unicode.
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func trimsplit(s, sep string) []string {
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raw := strings.Split(s, ",")
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trimmed := make([]string, 0)
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for _, r := range raw {
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trimmed = append(trimmed, strings.TrimSpace(r))
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}
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return trimmed
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}
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func argOrStdin(args []string, stdin io.Reader, i int) (string, error) {
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if i < len(args) {
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return args[i], nil
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}
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bytes, err := ioutil.ReadAll(stdin)
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if string(bytes) == "" || err != nil {
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return "", ErrNoAvailSrc
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}
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return string(bytes), nil
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}
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func getPeersFlagValue(c *cli.Context) []string {
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peerstr := c.GlobalString("endpoint")
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if peerstr == "" {
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peerstr = os.Getenv("ETCDCTL_ENDPOINT")
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}
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if peerstr == "" {
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peerstr = c.GlobalString("peers")
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}
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if peerstr == "" {
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peerstr = os.Getenv("ETCDCTL_PEERS")
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}
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// If we still don't have peers, use a default
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if peerstr == "" {
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peerstr = "http://127.0.0.1:4001,http://127.0.0.1:2379"
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}
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return strings.Split(peerstr, ",")
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}
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func getDomainDiscoveryFlagValue(c *cli.Context) ([]string, error) {
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domainstr := c.GlobalString("discovery-srv")
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// Use an environment variable if nothing was supplied on the
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// command line
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if domainstr == "" {
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domainstr = os.Getenv("ETCDCTL_DISCOVERY_SRV")
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}
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// If we still don't have domain discovery, return nothing
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if domainstr == "" {
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return []string{}, nil
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}
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discoverer := client.NewSRVDiscover()
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eps, err := discoverer.Discover(domainstr)
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if err != nil {
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return nil, err
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}
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return eps, err
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}
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func getEndpoints(c *cli.Context) ([]string, error) {
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eps, err := getDomainDiscoveryFlagValue(c)
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if err != nil {
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return nil, err
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}
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// If domain discovery returns no endpoints, check peer flag
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if len(eps) == 0 {
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eps = getPeersFlagValue(c)
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}
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for i, ep := range eps {
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u, err := url.Parse(ep)
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if err != nil {
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return nil, err
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}
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if u.Scheme == "" {
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u.Scheme = "http"
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}
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eps[i] = u.String()
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}
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return eps, nil
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}
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func getTransport(c *cli.Context) (*http.Transport, error) {
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cafile := c.GlobalString("ca-file")
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certfile := c.GlobalString("cert-file")
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keyfile := c.GlobalString("key-file")
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// Use an environment variable if nothing was supplied on the
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// command line
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if cafile == "" {
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cafile = os.Getenv("ETCDCTL_CA_FILE")
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}
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if certfile == "" {
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certfile = os.Getenv("ETCDCTL_CERT_FILE")
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}
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if keyfile == "" {
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keyfile = os.Getenv("ETCDCTL_KEY_FILE")
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}
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tls := transport.TLSInfo{
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CAFile: cafile,
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CertFile: certfile,
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KeyFile: keyfile,
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}
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return transport.NewTransport(tls)
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}
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func getUsernamePasswordFromFlag(usernameFlag string) (username string, password string, err error) {
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colon := strings.Index(usernameFlag, ":")
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if colon == -1 {
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username = usernameFlag
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// Prompt for the password.
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password, err = speakeasy.Ask("Password: ")
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if err != nil {
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return "", "", err
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}
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} else {
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username = usernameFlag[:colon]
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password = usernameFlag[colon+1:]
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}
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return username, password, nil
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}
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func mustNewKeyAPI(c *cli.Context) client.KeysAPI {
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return client.NewKeysAPI(mustNewClient(c))
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}
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func mustNewMembersAPI(c *cli.Context) client.MembersAPI {
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return client.NewMembersAPI(mustNewClient(c))
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}
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func mustNewClient(c *cli.Context) client.Client {
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hc, err := newClient(c)
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if err != nil {
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fmt.Fprintln(os.Stderr, err.Error())
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os.Exit(1)
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}
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debug := c.GlobalBool("debug")
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if debug {
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client.EnablecURLDebug()
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}
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if !c.GlobalBool("no-sync") {
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if debug {
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fmt.Fprintf(os.Stderr, "start to sync cluster using endpoints(%s)\n", strings.Join(hc.Endpoints(), ","))
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}
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ctx, cancel := context.WithTimeout(context.Background(), client.DefaultRequestTimeout)
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err := hc.Sync(ctx)
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cancel()
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if err != nil {
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if err == client.ErrNoEndpoints {
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fmt.Fprintf(os.Stderr, "etcd cluster has no published client endpoints.\n")
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fmt.Fprintf(os.Stderr, "Try '--no-sync' if you want to access non-published client endpoints(%s).\n", strings.Join(hc.Endpoints(), ","))
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}
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handleError(ExitServerError, err)
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os.Exit(1)
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}
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if debug {
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fmt.Fprintf(os.Stderr, "got endpoints(%s) after sync\n", strings.Join(hc.Endpoints(), ","))
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}
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}
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if debug {
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fmt.Fprintf(os.Stderr, "Cluster-Endpoints: %s\n", strings.Join(hc.Endpoints(), ", "))
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}
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return hc
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}
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func mustNewClientNoSync(c *cli.Context) client.Client {
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hc, err := newClient(c)
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if err != nil {
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fmt.Fprintln(os.Stderr, err.Error())
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os.Exit(1)
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}
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if c.GlobalBool("debug") {
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fmt.Fprintf(os.Stderr, "Cluster-Endpoints: %s\n", strings.Join(hc.Endpoints(), ", "))
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client.EnablecURLDebug()
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}
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return hc
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}
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func newClient(c *cli.Context) (client.Client, error) {
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eps, err := getEndpoints(c)
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if err != nil {
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return nil, err
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}
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tr, err := getTransport(c)
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if err != nil {
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return nil, err
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}
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cfg := client.Config{
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Transport: tr,
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Endpoints: eps,
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HeaderTimeoutPerRequest: c.GlobalDuration("timeout"),
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}
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uFlag := c.GlobalString("username")
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if uFlag != "" {
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username, password, err := getUsernamePasswordFromFlag(uFlag)
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if err != nil {
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return nil, err
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}
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cfg.Username = username
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cfg.Password = password
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}
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return client.New(cfg)
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}
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