/
main.go
236 lines (199 loc) · 7.22 KB
/
main.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
package main
import (
"context"
"net/http"
"net/http/httputil"
"os"
"os/signal"
"time"
"github.com/gorilla/handlers"
devopsbot "github.com/karl-johan-grahn/devopsbot"
"github.com/karl-johan-grahn/devopsbot/bot"
"github.com/karl-johan-grahn/devopsbot/config"
"github.com/karl-johan-grahn/devopsbot/internal/middleware"
"github.com/karl-johan-grahn/devopsbot/version"
"github.com/slack-go/slack"
"github.com/rs/zerolog"
"github.com/rs/zerolog/hlog"
"github.com/rs/zerolog/log"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
const (
tlsAddr = "tls.addr"
tlsCert = "tls.cert"
tlsKey = "tls.key"
// This is not a hardcoded credential but simply a convenience reference to the secret name
//nolint:gosec
slackBotAccessToken = "slack.botAccessToken"
slackUserAccessToken = "slack.userAccessToken"
slackSigningSecret = "slack.signingSecret"
slackAdminGroup = "slack.adminGroupID"
broadcastChannelID = "slack.broadcastChannelID"
)
func initFlags(cmd *cobra.Command) {
cmd.Flags().SortFlags = false
cmd.Flags().StringP("addr", "a", ":3333", "address:port to listen on")
cmd.Flags().String(tlsAddr, ":3443", "address:port to listen on for TLS")
cmd.Flags().String(tlsCert, "devopsbot.pem", "Path to TLS certificate")
cmd.Flags().String(tlsKey, "devopsbot-key.pem", "Path to TLS private key")
cmd.Flags().BoolP("verbose", "v", false, "Output extra logs")
cmd.Flags().BoolP("trace", "t", false, "Output trace logs")
cmd.Flags().String(slackBotAccessToken, "", "Slack bot access token")
cmd.Flags().String(slackUserAccessToken, "", "Slack user access token")
cmd.Flags().String(slackSigningSecret, "", "Slack bot signing secret")
cmd.Flags().String(slackAdminGroup, "", "Slack ID for the admin user group")
cmd.Flags().String(broadcastChannelID, "", "Slack ID for the channel to use as the broadcast channel")
cmd.Flags().String("config", "config.yaml", "Config file to read (optional)")
// Disable false positive lint
//nolint:errcheck
viper.BindPFlags(cmd.Flags())
cobra.OnInitialize(initConfig(cmd))
}
func initConfig(cmd *cobra.Command) func() {
return func() {
configRequired := false
if cmd.Flags().Changed("config") {
// Use config file from the flag if it's explicitly set
viper.SetConfigFile(viper.GetString("config"))
configRequired = true
} else {
viper.AddConfigPath(".")
viper.AddConfigPath("./config")
viper.AddConfigPath("../config")
viper.SetConfigName("config")
}
err := viper.ReadInConfig()
if err != nil && configRequired {
log.Fatal().Msgf("Specified config file '%s' missing: %v", viper.GetString("config"), err)
}
_ = viper.BindEnv("verbose", "verbose")
_ = viper.BindEnv("trace", "trace")
if viper.GetBool("verbose") {
zerolog.SetGlobalLevel(zerolog.DebugLevel)
}
if viper.GetBool("trace") {
zerolog.SetGlobalLevel(zerolog.TraceLevel)
}
if err != nil {
log.Trace().Msgf("Specified config file '%s' missing: %v", viper.GetString("config"), err)
} else {
log.Debug().Msgf("Using config file: %s", viper.ConfigFileUsed())
}
_ = viper.BindEnv("server.prometheusNamespace", "server.prometheusNamespace")
_ = viper.BindEnv("incidentDocTemplateURL", "incidentDocTemplateURL")
_ = viper.BindEnv("incident.environments", "incident.environments")
_ = viper.BindEnv("incident.regions", "incident.regions")
_ = viper.BindEnv("incident.severityLevels", "incident.severityLevels")
_ = viper.BindEnv("incident.impactLevels", "incident.impactLevels")
_ = viper.BindEnv("addr", "addr")
_ = viper.BindEnv(tlsAddr, tlsAddr)
_ = viper.BindEnv(tlsCert, tlsCert)
_ = viper.BindEnv(tlsKey, tlsKey)
_ = viper.BindEnv(slackBotAccessToken, slackBotAccessToken)
_ = viper.BindEnv(slackUserAccessToken, slackUserAccessToken)
_ = viper.BindEnv(slackSigningSecret, slackSigningSecret)
_ = viper.BindEnv(slackAdminGroup, slackAdminGroup)
_ = viper.BindEnv(broadcastChannelID, broadcastChannelID)
}
}
func main() {
ctx := context.Background()
ctx = initLogger(ctx)
command := newCmd()
initFlags(command)
if err := command.ExecuteContext(ctx); err != nil {
log.Fatal().Err(err).Msg(command.Name() + " failed")
}
}
func newCmd() *cobra.Command {
cmd := &cobra.Command{
Use: "devopsbot",
Short: "devopsbot improves efficiency by automating tasks",
Version: version.Version,
RunE: func(cmd *cobra.Command, args []string) error {
ctx, cancel := context.WithCancel(cmd.Context())
log := zerolog.Ctx(ctx)
defer cancel()
// update the logger's own level
*log = log.Level(zerolog.GlobalLevel())
log.Info().
Str("version", version.Version).
Str("revision", version.Revision).
Str("cmd", cmd.CalledAs()).
Msg("starting bot")
cmd.SilenceErrors = true
cmd.SilenceUsage = true
cfg, err := config.FromViper(viper.GetViper())
if err != nil {
return err
}
slackClient := slack.New(cfg.SlackBotAccessToken,
slack.OptionDebug(viper.GetBool("verbose")),
slack.OptionHTTPClient(&http.Client{Transport: &spyTransport{rt: http.DefaultTransport}}),
)
opts := bot.Opts{
UserAccessToken: cfg.SlackUserAccessToken,
SigningSecret: cfg.SlackSigningSecret,
AdminGroupID: cfg.SlackAdminGroupID,
BroadcastChannelID: cfg.BroadcastChannelID,
IncidentDocTemplateURL: cfg.IncidentDocTemplateURL,
IncidentEnvs: cfg.IncidentEnvs,
IncidentRegions: cfg.IncidentRegions,
IncidentSeverityLevels: cfg.IncidentSeverityLevels,
IncidentImpactLevels: cfg.IncidentImpactLevels,
}
log.Debug().Msgf("opts: %#v", opts)
mux := http.NewServeMux()
mux.Handle("/", devopsbot.HealthHandler(cfg.NS))
mux.Handle("/bot/", http.StripPrefix("/bot", bot.NewBot(slackClient, opts)))
h := http.Handler(mux)
h = middleware.Logger(ctx, handlers.CompressHandler(h))
// Run the servers non-blocking in goroutines so we can shut down gracefully
httpSrv := &http.Server{Addr: cfg.Addr, Handler: h}
go func() {
log.Info().Str("addr", cfg.Addr).Msg("listening on HTTP")
if err := httpSrv.ListenAndServe(); err != nil {
log.Error().Err(err).Send()
}
}()
httpsSrv := &http.Server{Addr: cfg.TLSAddr, Handler: h}
go func() {
log.Info().Str("addr", cfg.TLSAddr).Msg("listening on HTTPS")
if err := httpsSrv.ListenAndServeTLS(cfg.TLSCert, cfg.TLSKey); err != nil {
log.Error().Err(err).Send()
}
}()
ch := make(chan os.Signal, 1)
// Handle SIGINT (Ctrl+C)
signal.Notify(ch, os.Interrupt)
<-ch
// Parent already defers cancel above, so disable false positive lint
//nolint:govet
ctx, _ = context.WithTimeout(ctx, 15*time.Second)
log.Info().Msg("shutting down")
err = httpSrv.Shutdown(ctx)
if err != nil {
return err
}
return httpsSrv.Shutdown(ctx)
},
}
return cmd
}
type spyTransport struct {
rt http.RoundTripper
}
func (t *spyTransport) RoundTrip(req *http.Request) (resp *http.Response, err error) {
log := hlog.FromRequest(req)
if log.GetLevel() == zerolog.TraceLevel {
b, _ := httputil.DumpRequestOut(req, true)
log.Trace().Bytes("request", b).Msg("dumping request")
}
resp, err = t.rt.RoundTrip(req)
if resp != nil && log.GetLevel() == zerolog.TraceLevel {
b, _ := httputil.DumpResponse(resp, true)
log.Trace().Bytes("response", b).Msg("dumping response")
}
return resp, err
}