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main.go
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main.go
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// Copyright 2015 Tigera Inc
//
// 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 (
"encoding/json"
"fmt"
"runtime"
"github.com/containernetworking/cni/pkg/skel"
cnitypes "github.com/containernetworking/cni/pkg/types"
cniSpecVersion "github.com/containernetworking/cni/pkg/version"
"github.com/midonet/midonet-kubernetes/pkg/cni/k8s"
"github.com/midonet/midonet-kubernetes/pkg/cni/types"
"github.com/midonet/midonet-kubernetes/pkg/cni/utils"
"github.com/projectcalico/libcalico-go/lib/logutils"
"github.com/sirupsen/logrus"
)
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 cmdAdd(args *skel.CmdArgs) error {
// Unmarshal the network config, and perform validation
conf := types.NetConf{}
if err := json.Unmarshal(args.StdinData, &conf); err != nil {
return fmt.Errorf("failed to load netconf: %v", err)
}
utils.ConfigureLogging(conf.LogLevel)
// Extract WEP identifiers such as pod name, pod namespace (for k8s), containerID, IfName.
wepIDs, err := utils.GetIdentifiers(args)
if err != nil {
return err
}
logrus.WithField("EndpointIDs", wepIDs).Info("Extracted identifiers")
logrus.WithField("NetConfg", conf).Info("Loaded CNI NetConf")
result, err := k8s.CmdAddK8s(args, conf, *wepIDs)
if err != nil {
return err
}
// Set Gateway to nil. Calico-IPAM doesn't set it, but host-local does.
// We modify IPs subnet received from the IPAM plugin (host-local),
// so Gateway isn't valid anymore. It is also not used anywhere by Calico.
for _, ip := range result.IPs {
ip.Gateway = nil
}
// Print result to stdout, in the format defined by the requested cniVersion.
return cnitypes.PrintResult(result, conf.CNIVersion)
}
func cmdDel(args *skel.CmdArgs) error {
conf := types.NetConf{}
if err := json.Unmarshal(args.StdinData, &conf); err != nil {
return fmt.Errorf("failed to load netconf: %v", err)
}
utils.ConfigureLogging(conf.LogLevel)
epIDs, err := utils.GetIdentifiers(args)
if err != nil {
return err
}
logger := logrus.WithFields(logrus.Fields{
"ContainerID": epIDs.ContainerID,
})
return k8s.CmdDelK8s(*epIDs, args, conf, logger)
}
func main() {
// Set up logging formatting.
logrus.SetFormatter(&logutils.Formatter{})
// Install a hook that adds file/line no information.
logrus.AddHook(&logutils.ContextHook{})
skel.PluginMain(cmdAdd, cmdDel, cniSpecVersion.All)
}