mirror of https://github.com/k3s-io/k3s
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
104 lines
2.0 KiB
104 lines
2.0 KiB
package flannel
|
|
|
|
import (
|
|
"context"
|
|
"path/filepath"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/rancher/k3s/pkg/agent/util"
|
|
"github.com/rancher/k3s/pkg/daemons/config"
|
|
"github.com/sirupsen/logrus"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/client-go/kubernetes"
|
|
"k8s.io/client-go/tools/clientcmd"
|
|
)
|
|
|
|
const (
|
|
cniConf = `{
|
|
"name":"cbr0",
|
|
"cniVersion":"0.3.1",
|
|
"plugins":[
|
|
{
|
|
"type":"flannel",
|
|
"delegate":{
|
|
"forceAddress":true,
|
|
"isDefaultGateway":true
|
|
}
|
|
},
|
|
{
|
|
"type":"portmap",
|
|
"capabilities":{
|
|
"portMappings":true
|
|
}
|
|
}
|
|
]
|
|
}
|
|
`
|
|
netJSON = `{
|
|
"Network": "%CIDR%",
|
|
"Backend": {
|
|
"Type": "vxlan"
|
|
}
|
|
}
|
|
`
|
|
)
|
|
|
|
func Prepare(ctx context.Context, config *config.Node) error {
|
|
if err := createCNIConf(config.AgentConfig.CNIConfDir); err != nil {
|
|
return err
|
|
}
|
|
|
|
return createFlannelConf(config)
|
|
}
|
|
|
|
func Run(ctx context.Context, config *config.Node) error {
|
|
nodeName := config.AgentConfig.NodeName
|
|
|
|
restConfig, err := clientcmd.BuildConfigFromFlags("", config.AgentConfig.KubeConfig)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
client, err := kubernetes.NewForConfig(restConfig)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
for {
|
|
node, err := client.CoreV1().Nodes().Get(nodeName, metav1.GetOptions{})
|
|
if err == nil && node.Spec.PodCIDR != "" {
|
|
break
|
|
}
|
|
if err == nil {
|
|
logrus.Infof("waiting for node %s CIDR not assigned yet", nodeName)
|
|
} else {
|
|
logrus.Infof("waiting for node %s: %v", nodeName, err)
|
|
}
|
|
time.Sleep(2 * time.Second)
|
|
}
|
|
|
|
go func() {
|
|
err := flannel(ctx, config.FlannelIface, config.FlannelConf, config.AgentConfig.KubeConfig)
|
|
logrus.Fatalf("flannel exited: %v", err)
|
|
}()
|
|
|
|
return err
|
|
}
|
|
|
|
func createCNIConf(dir string) error {
|
|
if dir == "" {
|
|
return nil
|
|
}
|
|
p := filepath.Join(dir, "10-flannel.conflist")
|
|
return util.WriteFile(p, cniConf)
|
|
}
|
|
|
|
func createFlannelConf(config *config.Node) error {
|
|
if config.FlannelConf == "" {
|
|
return nil
|
|
}
|
|
return util.WriteFile(config.FlannelConf,
|
|
strings.Replace(netJSON, "%CIDR%", config.AgentConfig.ClusterCIDR.String(), -1))
|
|
}
|