forked from yamt/midonet-kubernetes
/
main.go
140 lines (126 loc) · 4.22 KB
/
main.go
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// 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 (
"net"
"os"
"runtime"
"time"
"github.com/containernetworking/cni/pkg/types/current"
"github.com/projectcalico/libcalico-go/lib/logutils"
log "github.com/sirupsen/logrus"
k8scni "github.com/midonet/midonet-kubernetes/pkg/cni/k8s"
"github.com/midonet/midonet-kubernetes/pkg/cni/utils"
"github.com/midonet/midonet-kubernetes/pkg/converter"
"github.com/midonet/midonet-kubernetes/pkg/converter/node"
"github.com/midonet/midonet-kubernetes/pkg/k8s"
)
// NOTE(yamamoto): This init function was taken from calico CNI plugin
func init() {
// This ensures that main runs only on main thread (thread group leader).
// since namespace ops (unshare, setns) are done for a single thread, we
// must ensure that the goroutine does not jump from OS thread to thread
runtime.LockOSThread()
}
func main() {
// Configure log formatting.
log.SetFormatter(&logutils.Formatter{})
// Install a hook that adds file/line no information.
log.AddHook(&logutils.ContextHook{})
// Attempt to load configuration.
config := new(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, _, err := k8s.GetClient(config.Kubeconfig)
if err != nil {
log.WithError(err).Fatal("Failed to start")
}
nodeName := config.NodeName
logger := log.WithFields(log.Fields{
"nodeName": nodeName,
})
retry:
podCIDR, err := k8scni.GetNodePodCIDR(k8sClientset, nodeName)
if err != nil {
logger.WithError(err).Warn("GetNodePodCIDR")
time.Sleep(time.Second * 5)
goto retry
}
logger = logger.WithFields(log.Fields{
"podCIDR": podCIDR,
})
si, err := node.GetSubnetInfo(podCIDR)
if err != nil {
logger.WithError(err).Fatal("GetSubnetInfo")
}
ips := []*current.IPConfig{
{
Version: "4",
Address: si.NodeIP,
Gateway: si.GatewayIP.IP,
},
}
_, clusterNetwork, err := net.ParseCIDR(config.ClusterCIDR)
if err != nil {
logger.WithError(err).Fatal("ClusterCIDR")
}
networks := []*net.IPNet{clusterNetwork}
if config.ServiceCIDR != "" {
_, serviceNetwork, err := net.ParseCIDR(config.ServiceCIDR)
if err != nil {
logger.WithError(err).Fatal("ServiceCIDR")
}
networks = append(networks, serviceNetwork)
}
contNetNS := utils.GetCurrentThreadNetNSPath()
contVethName := "midokube-node"
hostVethName := node.IFName()
contVethMAC, err := utils.DoNetworking(networks, ips, contNetNS, contVethName, hostVethName, true, logger)
if err != nil {
logger.WithError(err).Fatal("DoNetworking")
}
logger = logger.WithField("mac", contVethMAC)
logger.Info("Success")
err = k8s.AddNodeAnnotation(k8sClientset, nodeName, converter.MACAnnotation, contVethMAC)
if err != nil {
logger.WithError(err).Warn("Node annotation failed")
} else {
logger.Info("Node annotation succeeded")
}
cniConfigPath := config.CNIConfigPath
if cniConfigPath != "" {
file, err := os.OpenFile(cniConfigPath, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0600)
if err != nil {
logger.WithError(err).Fatal("OpenFile")
}
err = generateCNIConfig(file, podCIDR)
if err != nil {
logger.WithError(err).Fatal("generateCNIConfig")
}
}
// Note: serveRPC usually doesn't return.
// Otherwise, we will exit and be restarted by kubernetes.
// Note that DaemonSet manadates restartPolicy=Always.
// https://kubernetes.io/docs/concepts/workloads/controllers/daemonset/#pod-template
serveRPC(k8sClientset)
}