-
Notifications
You must be signed in to change notification settings - Fork 680
/
main.go
169 lines (140 loc) · 4.6 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
package main
import (
"context"
"fmt"
"log"
"os"
"strings"
"time"
"github.com/spf13/cobra"
"github.com/datawire/ambassador/pkg/k8s"
"github.com/datawire/ambassador/pkg/limiter"
"github.com/datawire/ambassador/pkg/supervisor"
)
// Version holds the version of the code. This is intended to be overridden at build time.
var Version = "(unknown version)"
var kubernetesNamespace string
var initialSources = make([]string, 0)
var initialFieldSelector string
var initialLabelSelector string
var watchHooks = make([]string, 0)
var notifyReceivers = make([]string, 0)
var port int
var interval time.Duration
var showVersion bool
var rootCmd = &cobra.Command{
Use: "watt",
Short: "watt",
Long: "watt - watch all the things",
PersistentPreRun: func(cmd *cobra.Command, args []string) {},
Run: runWatt,
}
func init() {
rootCmd.Flags().StringVarP(&kubernetesNamespace, "namespace", "n", "", "namespace to watch (default: all)")
rootCmd.Flags().StringSliceVarP(&initialSources, "source", "s", []string{}, "configure an initial static source")
rootCmd.Flags().StringVar(&initialFieldSelector, "fields", "", "configure an initial field selector string")
rootCmd.Flags().StringVar(&initialLabelSelector, "labels", "", "configure an initial label selector string")
rootCmd.Flags().StringSliceVarP(&watchHooks, "watch", "w", []string{}, "configure watch hook(s)")
rootCmd.Flags().StringSliceVar(¬ifyReceivers, "notify", []string{},
"invoke the program with the given arguments as a receiver")
rootCmd.Flags().IntVarP(&port, "port", "p", 7000, "configure the snapshot server port")
rootCmd.Flags().DurationVarP(&interval, "interval", "i", 250*time.Millisecond,
"configure the rate limit interval")
rootCmd.Flags().BoolVarP(&showVersion, "version", "", false, "display version information")
}
func runWatt(cmd *cobra.Command, args []string) {
os.Exit(_runWatt(cmd, args))
}
func _runWatt(cmd *cobra.Command, args []string) int {
if showVersion {
fmt.Println("watt", Version)
return 0
}
if len(initialSources) == 0 {
log.Println("no initial sources configured")
return 1
}
// XXX: we don't need to create this here anymore
client, err := k8s.NewClient(nil)
if err != nil {
log.Println(err)
return 1
}
kubeAPIWatcher := client.Watcher()
/*for idx := range initialSources {
initialSources[idx] = kubeAPIWatcher.Canonical(initialSources[idx])
}*/
log.Printf("starting watt...")
// The aggregator sends the current consul resolver set to the
// consul watch manager.
aggregatorToConsulwatchmanCh := make(chan []ConsulWatchSpec, 100)
// The aggregator sends the current k8s watch set to the
// kubernetes watch manager.
aggregatorToKubewatchmanCh := make(chan []KubernetesWatchSpec, 100)
invoker := NewInvoker(port, notifyReceivers)
limiter := limiter.NewComposite(limiter.NewUnlimited(), limiter.NewInterval(interval), interval)
aggregator := NewAggregator(invoker.Snapshots, aggregatorToKubewatchmanCh, aggregatorToConsulwatchmanCh,
initialSources, ExecWatchHook(watchHooks), limiter)
kubebootstrap := kubebootstrap{
namespace: kubernetesNamespace,
kinds: initialSources,
fieldSelector: initialFieldSelector,
labelSelector: initialLabelSelector,
kubeAPIWatcher: kubeAPIWatcher,
notify: []chan<- k8sEvent{aggregator.KubernetesEvents},
}
consulwatchman := consulwatchman{
WatchMaker: &ConsulWatchMaker{aggregatorCh: aggregator.ConsulEvents},
watchesCh: aggregatorToConsulwatchmanCh,
watched: make(map[string]*supervisor.Worker),
}
kubewatchman := kubewatchman{
WatchMaker: &KubernetesWatchMaker{kubeAPI: client, notify: aggregator.KubernetesEvents},
in: aggregatorToKubewatchmanCh,
}
apiServer := &apiServer{
port: port,
invoker: invoker,
}
ctx := context.Background()
s := supervisor.WithContext(ctx)
s.Supervise(&supervisor.Worker{
Name: "kubebootstrap",
Work: kubebootstrap.Work,
})
s.Supervise(&supervisor.Worker{
Name: "consulwatchman",
Work: consulwatchman.Work,
})
s.Supervise(&supervisor.Worker{
Name: "kubewatchman",
Work: kubewatchman.Work,
})
s.Supervise(&supervisor.Worker{
Name: "aggregator",
Work: aggregator.Work,
})
s.Supervise(&supervisor.Worker{
Name: "invoker",
Work: invoker.Work,
})
s.Supervise(&supervisor.Worker{
Name: "api",
Work: apiServer.Work,
})
if errs := s.Run(); len(errs) > 0 {
msgs := []string{}
for _, err := range errs {
msgs = append(msgs, err.Error())
}
log.Printf("ERROR(s): %s", strings.Join(msgs, "\n "))
return 1
}
return 0
}
func main() {
if err := rootCmd.Execute(); err != nil {
log.Println(err)
os.Exit(1)
}
}