/
main.go
210 lines (166 loc) · 4.28 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
package main
import (
"flag"
"log"
"net"
"os"
"os/signal"
"runtime"
"strings"
"syscall"
"github.com/cloudfoundry-incubator/garden/server"
"github.com/cloudfoundry-incubator/warden-linux/linux_backend"
"github.com/cloudfoundry-incubator/warden-linux/linux_backend/container_pool"
"github.com/cloudfoundry-incubator/warden-linux/linux_backend/network_pool"
"github.com/cloudfoundry-incubator/warden-linux/linux_backend/port_pool"
"github.com/cloudfoundry-incubator/warden-linux/linux_backend/quota_manager"
"github.com/cloudfoundry-incubator/warden-linux/linux_backend/uid_pool"
"github.com/cloudfoundry-incubator/warden-linux/system_info"
"github.com/cloudfoundry/gunk/command_runner/linux_command_runner"
)
var listenNetwork = flag.String(
"listenNetwork",
"unix",
"how to listen on the address (unix, tcp, etc.)",
)
var listenAddr = flag.String(
"listenAddr",
"/tmp/warden.sock",
"address to listen on",
)
var snapshotsPath = flag.String(
"snapshots",
"",
"directory in which to store container state to persist through restarts",
)
var binPath = flag.String(
"bin",
"",
"directory containing backend-specific scripts (i.e. ./create.sh)",
)
var depotPath = flag.String(
"depot",
"",
"directory in which to store containers",
)
var rootFSPath = flag.String(
"rootfs",
"",
"directory of the rootfs for the containers",
)
var disableQuotas = flag.Bool(
"disableQuotas",
false,
"disable disk quotas",
)
var containerGraceTime = flag.Duration(
"containerGraceTime",
0,
"time after which to destroy idle containers",
)
var debug = flag.Bool(
"debug",
false,
"show low-level command output",
)
var networkPool = flag.String(
"networkPool",
"10.254.0.0/22",
"network pool CIDR for containers; each container will get a /30",
)
var portPoolStart = flag.Uint(
"portPoolStart",
61001,
"start of ephemeral port range used for mapped container ports",
)
var portPoolSize = flag.Uint(
"portPoolSize",
5000,
"size of port pool used for mapped container ports",
)
var uidPoolStart = flag.Uint(
"uidPoolStart",
10000,
"start of per-container user ids",
)
var uidPoolSize = flag.Uint(
"uidPoolSize",
256,
"size of the uid pool",
)
var denyNetworks = flag.String(
"denyNetworks",
"",
"CIDR blocks representing IPs to blacklist",
)
var allowNetworks = flag.String(
"allowNetworks",
"",
"CIDR blocks representing IPs to whitelist",
)
func main() {
flag.Parse()
maxProcs := runtime.NumCPU()
prevMaxProcs := runtime.GOMAXPROCS(maxProcs)
log.Println("set GOMAXPROCS to", maxProcs, "was", prevMaxProcs)
if *binPath == "" {
log.Fatalln("must specify -bin with linux backend")
}
if *depotPath == "" {
log.Fatalln("must specify -depot with linux backend")
}
if *rootFSPath == "" {
log.Fatalln("must specify -rootfs with linux backend")
}
uidPool := uid_pool.New(uint32(*uidPoolStart), uint32(*uidPoolSize))
_, ipNet, err := net.ParseCIDR(*networkPool)
if err != nil {
log.Fatalln("error parsing CIDR:", err)
}
networkPool := network_pool.New(ipNet)
// TODO: use /proc/sys/net/ipv4/ip_local_port_range by default (end + 1)
portPool := port_pool.New(uint32(*portPoolStart), uint32(*portPoolSize))
runner := linux_command_runner.New(*debug)
quotaManager, err := quota_manager.New(*depotPath, *binPath, runner)
if err != nil {
log.Fatalln("error creating quota manager:", err)
}
if *disableQuotas {
quotaManager.Disable()
}
pool := container_pool.New(
*binPath,
*depotPath,
*rootFSPath,
uidPool,
networkPool,
portPool,
strings.Split(*denyNetworks, ","),
strings.Split(*allowNetworks, ","),
runner,
quotaManager,
)
systemInfo := system_info.NewProvider(*depotPath)
backend := linux_backend.New(pool, systemInfo, *snapshotsPath)
log.Println("setting up backend")
err = backend.Setup()
if err != nil {
log.Fatalln("failed to set up backend:", err)
}
log.Println("starting server; listening with", *listenNetwork, "on", *listenAddr)
graceTime := *containerGraceTime
wardenServer := server.New(*listenNetwork, *listenAddr, graceTime, backend)
err = wardenServer.Start()
if err != nil {
log.Fatalln("failed to start:", err)
}
signals := make(chan os.Signal, 1)
go func() {
<-signals
log.Println("stopping...")
wardenServer.Stop()
os.Exit(0)
}()
signal.Notify(signals, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
select {}
}