forked from fabiolb/fabio
-
Notifications
You must be signed in to change notification settings - Fork 0
/
load.go
367 lines (330 loc) · 12.5 KB
/
load.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
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
package config
import (
"errors"
"flag"
"fmt"
"log"
"net/http"
"os"
"runtime"
"strings"
"time"
"github.com/magiconair/properties"
)
func Load() (cfg *Config, err error) {
var path string
for i, arg := range os.Args {
if arg == "-v" {
return nil, nil
}
path, err = parseCfg(os.Args, i)
if err != nil {
return nil, err
}
if path != "" {
break
}
}
p, err := loadProperties(path)
if err != nil {
return nil, err
}
return load(p)
}
var errInvalidConfig = errors.New("invalid or missing path to config file")
func parseCfg(args []string, i int) (path string, err error) {
if len(args) == 0 || i >= len(args) || !strings.HasPrefix(args[i], "-cfg") {
return "", nil
}
arg := args[i]
if arg == "-cfg" {
if i >= len(args)-1 {
return "", errInvalidConfig
}
return args[i+1], nil
}
if !strings.HasPrefix(arg, "-cfg=") {
return "", errInvalidConfig
}
path = arg[len("-cfg="):]
switch {
case path == "":
return "", errInvalidConfig
case path[0] == '\'':
path = strings.Trim(path, "'")
case path[0] == '"':
path = strings.Trim(path, "\"")
}
if path == "" {
return "", errInvalidConfig
}
return path, nil
}
func loadProperties(path string) (p *properties.Properties, err error) {
if path == "" {
return properties.NewProperties(), nil
}
if strings.HasPrefix(path, "http://") || strings.HasPrefix(path, "https://") {
return properties.LoadURL(path)
}
return properties.LoadFile(path, properties.UTF8)
}
func load(p *properties.Properties) (cfg *Config, err error) {
cfg = &Config{}
f := NewFlagSet(os.Args[0], flag.ExitOnError)
// dummy values which were parsed earlier
f.String("cfg", "", "Path or URL to config file")
f.Bool("v", false, "Show version")
// config values
f.IntVar(&cfg.Proxy.MaxConn, "proxy.maxconn", Default.Proxy.MaxConn, "maximum number of cached connections")
f.StringVar(&cfg.Proxy.Strategy, "proxy.strategy", Default.Proxy.Strategy, "load balancing strategy")
f.StringVar(&cfg.Proxy.Matcher, "proxy.matcher", Default.Proxy.Matcher, "path matching algorithm")
f.IntVar(&cfg.Proxy.NoRouteStatus, "proxy.noroutestatus", Default.Proxy.NoRouteStatus, "status code for invalid route")
f.DurationVar(&cfg.Proxy.ShutdownWait, "proxy.shutdownwait", Default.Proxy.ShutdownWait, "time for graceful shutdown")
f.DurationVar(&cfg.Proxy.DialTimeout, "proxy.dialtimeout", Default.Proxy.DialTimeout, "connection timeout for backend connections")
f.DurationVar(&cfg.Proxy.ResponseHeaderTimeout, "proxy.responseheadertimeout", Default.Proxy.ResponseHeaderTimeout, "response header timeout")
f.DurationVar(&cfg.Proxy.KeepAliveTimeout, "proxy.keepalivetimeout", Default.Proxy.KeepAliveTimeout, "keep-alive timeout")
f.StringVar(&cfg.Proxy.LocalIP, "proxy.localip", Default.Proxy.LocalIP, "fabio address in Forward headers")
f.StringVar(&cfg.Proxy.ClientIPHeader, "proxy.header.clientip", Default.Proxy.ClientIPHeader, "header for the request ip")
f.StringVar(&cfg.Proxy.TLSHeader, "proxy.header.tls", Default.Proxy.TLSHeader, "header for TLS connections")
f.StringVar(&cfg.Proxy.TLSHeaderValue, "proxy.header.tls.value", Default.Proxy.TLSHeaderValue, "value for TLS connection header")
f.StringSliceVar(&cfg.ListenerValue, "proxy.addr", Default.ListenerValue, "listener config")
f.KVSliceVar(&cfg.CertSourcesValue, "proxy.cs", Default.CertSourcesValue, "certificate sources")
f.DurationVar(&cfg.Proxy.ReadTimeout, "proxy.readtimeout", Default.Proxy.ReadTimeout, "read timeout for incoming requests")
f.DurationVar(&cfg.Proxy.WriteTimeout, "proxy.writetimeout", Default.Proxy.WriteTimeout, "write timeout for outgoing responses")
f.DurationVar(&cfg.Proxy.FlushInterval, "proxy.flushinterval", Default.Proxy.FlushInterval, "flush interval for streaming responses")
f.StringVar(&cfg.Metrics.Target, "metrics.target", Default.Metrics.Target, "metrics backend")
f.StringVar(&cfg.Metrics.Prefix, "metrics.prefix", Default.Metrics.Prefix, "prefix for reported metrics")
f.StringVar(&cfg.Metrics.Names, "metrics.names", Default.Metrics.Names, "route metric name template")
f.DurationVar(&cfg.Metrics.Interval, "metrics.interval", Default.Metrics.Interval, "metrics reporting interval")
f.StringVar(&cfg.Metrics.GraphiteAddr, "metrics.graphite.addr", Default.Metrics.GraphiteAddr, "graphite server address")
f.StringVar(&cfg.Metrics.StatsDAddr, "metrics.statsd.addr", Default.Metrics.StatsDAddr, "statsd server address")
f.StringVar(&cfg.Metrics.CirconusAPIKey, "metrics.circonus.apikey", Default.Metrics.CirconusAPIKey, "Circonus API token key")
f.StringVar(&cfg.Metrics.CirconusAPIApp, "metrics.circonus.apiapp", Default.Metrics.CirconusAPIApp, "Circonus API token app")
f.StringVar(&cfg.Metrics.CirconusAPIURL, "metrics.circonus.apiurl", Default.Metrics.CirconusAPIURL, "Circonus API URL")
f.StringVar(&cfg.Metrics.CirconusBrokerID, "metrics.circonus.brokerid", Default.Metrics.CirconusBrokerID, "Circonus Broker ID")
f.StringVar(&cfg.Metrics.CirconusCheckID, "metrics.circonus.checkid", Default.Metrics.CirconusCheckID, "Circonus Check ID")
f.StringVar(&cfg.Registry.Backend, "registry.backend", Default.Registry.Backend, "registry backend")
f.StringVar(&cfg.Registry.File.Path, "registry.file.path", Default.Registry.File.Path, "path to file based routing table")
f.StringVar(&cfg.Registry.Static.Routes, "registry.static.routes", Default.Registry.Static.Routes, "static routes")
f.StringVar(&cfg.Registry.Consul.Addr, "registry.consul.addr", Default.Registry.Consul.Addr, "address of the consul agent")
f.StringVar(&cfg.Registry.Consul.Token, "registry.consul.token", Default.Registry.Consul.Token, "token for consul agent")
f.StringVar(&cfg.Registry.Consul.KVPath, "registry.consul.kvpath", Default.Registry.Consul.KVPath, "consul KV path for manual overrides")
f.StringVar(&cfg.Registry.Consul.TagPrefix, "registry.consul.tagprefix", Default.Registry.Consul.TagPrefix, "prefix for consul tags")
f.BoolVar(&cfg.Registry.Consul.Register, "registry.consul.register.enabled", Default.Registry.Consul.Register, "register fabio in consul")
f.StringVar(&cfg.Registry.Consul.ServiceAddr, "registry.consul.register.addr", Default.Registry.Consul.ServiceAddr, "service registration address")
f.StringVar(&cfg.Registry.Consul.ServiceName, "registry.consul.register.name", Default.Registry.Consul.ServiceName, "service registration name")
f.StringSliceVar(&cfg.Registry.Consul.ServiceTags, "registry.consul.register.tags", Default.Registry.Consul.ServiceTags, "service registration tags")
f.StringSliceVar(&cfg.Registry.Consul.ServiceStatus, "registry.consul.service.status", Default.Registry.Consul.ServiceStatus, "valid service status values")
f.DurationVar(&cfg.Registry.Consul.CheckInterval, "registry.consul.register.checkInterval", Default.Registry.Consul.CheckInterval, "service check interval")
f.DurationVar(&cfg.Registry.Consul.CheckTimeout, "registry.consul.register.checkTimeout", Default.Registry.Consul.CheckTimeout, "service check timeout")
f.IntVar(&cfg.Runtime.GOGC, "runtime.gogc", Default.Runtime.GOGC, "sets runtime.GOGC")
f.IntVar(&cfg.Runtime.GOMAXPROCS, "runtime.gomaxprocs", Default.Runtime.GOMAXPROCS, "sets runtime.GOMAXPROCS")
f.StringVar(&cfg.UI.Addr, "ui.addr", Default.UI.Addr, "address the UI/API is listening on")
f.StringVar(&cfg.UI.Color, "ui.color", Default.UI.Color, "background color of the UI")
f.StringVar(&cfg.UI.Title, "ui.title", Default.UI.Title, "optional title for the UI")
var awsApiGWCertCN string
f.StringVar(&awsApiGWCertCN, "aws.apigw.cert.cn", "", "deprecated. use caupgcn=<CN> for cert source")
// filter out -test flags
var args []string
for _, a := range os.Args[1:] {
if strings.HasPrefix(a, "-test.") {
continue
}
args = append(args, a)
}
// parse configuration
prefixes := []string{"FABIO_", ""}
if err := f.ParseFlags(args, os.Environ(), prefixes, p); err != nil {
return nil, err
}
// post configuration
if cfg.Runtime.GOMAXPROCS == -1 {
cfg.Runtime.GOMAXPROCS = runtime.NumCPU()
}
cfg.Registry.Consul.Scheme, cfg.Registry.Consul.Addr = parseScheme(cfg.Registry.Consul.Addr)
cfg.CertSources, err = parseCertSources(cfg.CertSourcesValue)
if err != nil {
return nil, err
}
cfg.Listen, err = parseListeners(cfg.ListenerValue, cfg.CertSources, cfg.Proxy.ReadTimeout, cfg.Proxy.WriteTimeout)
if err != nil {
return nil, err
}
// handle deprecations
// deprecate := func(name, msg string) {
// if f.IsSet(name) {
// log.Print("[WARN] ", msg)
// }
// }
return cfg, nil
}
// parseScheme splits a url into scheme and address and defaults
// to "http" if no scheme was given.
func parseScheme(s string) (scheme, addr string) {
s = strings.ToLower(s)
if strings.HasPrefix(s, "https://") {
return "https", s[len("https://"):]
}
if strings.HasPrefix(s, "http://") {
return "http", s[len("http://"):]
}
return "http", s
}
func parseListeners(cfgs []string, cs map[string]CertSource, readTimeout, writeTimeout time.Duration) (listen []Listen, err error) {
for _, cfg := range cfgs {
l, err := parseListen(cfg, cs, readTimeout, writeTimeout)
if err != nil {
return nil, err
}
listen = append(listen, l)
}
return
}
func parseListen(cfg string, cs map[string]CertSource, readTimeout, writeTimeout time.Duration) (l Listen, err error) {
if cfg == "" {
return Listen{}, nil
}
opts := strings.Split(cfg, ";")
if len(opts) > 1 && !strings.Contains(opts[1], "=") {
return parseLegacyListen(cfg, readTimeout, writeTimeout)
}
l = Listen{
Addr: opts[0],
ReadTimeout: readTimeout,
WriteTimeout: writeTimeout,
}
var csName string
for k, v := range kvParse(cfg) {
switch k {
case "proto":
l.Proto = v
if l.Proto != "http" && l.Proto != "https" && l.Proto != "tcp+sni" {
return Listen{}, fmt.Errorf("unknown protocol %q", v)
}
case "rt": // read timeout
d, err := time.ParseDuration(v)
if err != nil {
return Listen{}, err
}
l.ReadTimeout = d
case "wt": // write timeout
d, err := time.ParseDuration(v)
if err != nil {
return Listen{}, err
}
l.WriteTimeout = d
case "cs": // cert source
csName = v
c, ok := cs[v]
if !ok {
return Listen{}, fmt.Errorf("unknown certificate source %q", v)
}
l.CertSource = c
if l.Proto == "" {
l.Proto = "https"
}
case "strictmatch":
l.StrictMatch = (v == "true")
}
}
if l.Proto == "" {
l.Proto = "http"
}
if csName != "" && l.Proto != "https" {
return Listen{}, fmt.Errorf("cert source requires proto 'https'")
}
if csName == "" && l.Proto == "https" {
return Listen{}, fmt.Errorf("proto 'https' requires cert source")
}
return
}
func parseLegacyListen(cfg string, readTimeout, writeTimeout time.Duration) (l Listen, err error) {
opts := strings.Split(cfg, ";")
l = Listen{
Addr: opts[0],
Proto: "http",
ReadTimeout: readTimeout,
WriteTimeout: writeTimeout,
}
if len(opts) > 1 {
l.Proto = "https"
l.CertSource.Type = "file"
l.CertSource.CertPath = opts[1]
}
if len(opts) > 2 {
l.CertSource.KeyPath = opts[2]
}
if len(opts) > 3 {
l.CertSource.ClientCAPath = opts[3]
}
if len(opts) > 4 {
return Listen{}, fmt.Errorf("invalid listener configuration")
}
log.Printf("[WARN] proxy.addr legacy configuration for certificates is deprecated. Use cs=path configuration")
return l, nil
}
func parseCertSources(cfgs []map[string]string) (cs map[string]CertSource, err error) {
cs = map[string]CertSource{}
for _, cfg := range cfgs {
src, err := parseCertSource(cfg)
if err != nil {
return nil, err
}
cs[src.Name] = src
}
return
}
func parseCertSource(cfg map[string]string) (c CertSource, err error) {
if cfg == nil {
return CertSource{}, nil
}
c.Refresh = 3 * time.Second
for k, v := range cfg {
switch k {
case "cs":
c.Name = v
case "type":
c.Type = v
case "cert":
c.CertPath = v
case "key":
c.KeyPath = v
case "clientca":
c.ClientCAPath = v
case "caupgcn":
c.CAUpgradeCN = v
case "refresh":
d, err := time.ParseDuration(v)
if err != nil {
return CertSource{}, err
}
c.Refresh = d
case "hdr":
p := strings.SplitN(v, ": ", 2)
if len(p) != 2 {
return CertSource{}, fmt.Errorf("invalid header %s", v)
}
if c.Header == nil {
c.Header = http.Header{}
}
c.Header.Set(p[0], p[1])
}
}
if c.Name == "" {
return CertSource{}, fmt.Errorf("missing 'cs' in %s", cfg)
}
if c.Type == "" {
return CertSource{}, fmt.Errorf("missing 'type' in %s", cfg)
}
if c.CertPath == "" {
return CertSource{}, fmt.Errorf("missing 'cert' in %s", cfg)
}
if c.Type != "file" && c.Type != "path" && c.Type != "http" && c.Type != "consul" && c.Type != "vault" {
return CertSource{}, fmt.Errorf("unknown cert source type %s", c.Type)
}
if c.Type == "file" {
c.Refresh = 0
}
return
}