forked from projectcalico/kube-controllers
/
main.go
141 lines (122 loc) · 4.84 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
// Copyright (c) 2017 Tigera, Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"flag"
"fmt"
"os"
"strings"
"github.com/projectcalico/kube-controllers/pkg/config"
"github.com/projectcalico/kube-controllers/pkg/controllers/namespace"
"github.com/projectcalico/kube-controllers/pkg/controllers/networkpolicy"
"github.com/projectcalico/kube-controllers/pkg/controllers/pod"
k8s "github.com/projectcalico/libcalico-go/lib/backend/k8s"
"github.com/projectcalico/libcalico-go/lib/client"
"github.com/projectcalico/libcalico-go/lib/logutils"
log "github.com/sirupsen/logrus"
"k8s.io/client-go/kubernetes"
_ "k8s.io/client-go/plugin/pkg/client/auth"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
"github.com/projectcalico/kube-controllers/pkg/controllers/node"
)
// VERSION is filled out during the build process (using git describe output)
var VERSION string
func main() {
// Configure log formatting.
log.SetFormatter(&logutils.Formatter{})
// Install a hook that adds file/line no information.
log.AddHook(&logutils.ContextHook{})
// If `-v` is passed, display the version and exit.
// Use a new flag set so as not to conflict with existing libraries which use "flag"
flagSet := flag.NewFlagSet("Calico", flag.ExitOnError)
version := flagSet.Bool("v", false, "Display version")
err := flagSet.Parse(os.Args[1:])
if err != nil {
log.WithError(err).Fatal("Failed to parse flags")
}
if *version {
fmt.Println(VERSION)
os.Exit(0)
}
// Attempt to load configuration.
config := new(config.Config)
if err = config.Parse(); err != nil {
log.WithError(err).Fatal("Failed to parse config")
}
log.WithField("config", config).Info("Loaded configuration from environment")
// Set the log level based on the loaded configuration.
logLevel, err := log.ParseLevel(config.LogLevel)
if err != nil {
logLevel = log.InfoLevel
}
log.SetLevel(logLevel)
// Build clients to be used by the controllers.
k8sClientset, calicoClient, extensionsClient, err := getClients(config.Kubeconfig)
if err != nil {
log.WithError(err).Fatal("Failed to start")
}
stop := make(chan struct{})
defer close(stop)
for _, controllerType := range strings.Split(config.EnabledControllers, ",") {
switch controllerType {
case "workloadendpoint":
podController := pod.NewPodController(k8sClientset, calicoClient)
go podController.Run(config.WorkloadEndpointWorkers, config.ReconcilerPeriod, stop)
case "profile":
namespaceController := namespace.NewNamespaceController(k8sClientset, calicoClient)
go namespaceController.Run(config.ProfileWorkers, config.ReconcilerPeriod, stop)
case "policy":
policyController := networkpolicy.NewPolicyController(extensionsClient, calicoClient)
go policyController.Run(config.PolicyWorkers, config.ReconcilerPeriod, stop)
case "node":
nodeController := node.NewNodeController(k8sClientset, calicoClient)
go nodeController.Run(config.NodeWorkers, config.ReconcilerPeriod, stop)
default:
log.Fatalf("Invalid controller '%s' provided. Valid options are workloadendpoint, profile, policy", controllerType)
}
}
// Wait forever.
select {}
}
// getClients builds and returns Kubernetes, Calico and Extensions clients.
func getClients(kubeconfig string) (*kubernetes.Clientset, *client.Client, *rest.RESTClient, error) {
// First, build the Calico client using the configured environment variables.
cconfig, err := client.LoadClientConfig("")
if err != nil {
return nil, nil, nil, err
}
// Get Calico client
calicoClient, err := client.New(*cconfig)
if err != nil {
return nil, nil, nil, fmt.Errorf("failed to build Calico client: %s", err)
}
// Now build the Kubernetes client, we support in-cluster config and kubeconfig
// as means of configuring the client.
k8sconfig, err := clientcmd.BuildConfigFromFlags("", kubeconfig)
if err != nil {
return nil, nil, nil, fmt.Errorf("failed to build kubernetes client config: %s", err)
}
// Get kubenetes clientset
k8sClientset, err := kubernetes.NewForConfig(k8sconfig)
if err != nil {
return nil, nil, nil, fmt.Errorf("failed to build kubernetes client: %s", err)
}
// Get extensions client
extensionsClient, err := k8s.BuildExtensionsClientV1(*k8sconfig)
if err != nil {
return nil, nil, nil, fmt.Errorf("failed to build extensions client: %s", err)
}
return k8sClientset, calicoClient, extensionsClient, nil
}