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config.go
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config.go
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package pinger
import (
"context"
"flag"
"os"
"time"
"github.com/spf13/pflag"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/klog/v2"
"github.com/kubeovn/kube-ovn/pkg/util"
)
type Configuration struct {
KubeConfigFile string
KubeClient kubernetes.Interface
Port int
DaemonSetNamespace string
DaemonSetName string
Interval int
Mode string
ExitCode int
InternalDNS string
ExternalDNS string
NodeName string
HostIP string
PodName string
PodIP string
PodProtocols []string
ExternalAddress string
NetworkMode string
EnableMetrics bool
// Used for OVS Monitor
PollTimeout int
PollInterval int
SystemRunDir string
DatabaseVswitchName string
DatabaseVswitchSocketRemote string
DatabaseVswitchFileDataPath string
DatabaseVswitchFileLogPath string
DatabaseVswitchFilePidPath string
DatabaseVswitchFileSystemIDPath string
ServiceVswitchdFileLogPath string
ServiceVswitchdFilePidPath string
ServiceOvnControllerFileLogPath string
ServiceOvnControllerFilePidPath string
}
func ParseFlags() (*Configuration, error) {
var (
argPort = pflag.Int("port", 8080, "metrics port")
argKubeConfigFile = pflag.String("kubeconfig", "", "Path to kubeconfig file with authorization and master location information. If not set use the inCluster token.")
argDaemonSetNameSpace = pflag.String("ds-namespace", "kube-system", "kube-ovn-pinger daemonset namespace")
argDaemonSetName = pflag.String("ds-name", "kube-ovn-pinger", "kube-ovn-pinger daemonset name")
argInterval = pflag.Int("interval", 5, "interval seconds between consecutive pings")
argMode = pflag.String("mode", "server", "server or job Mode")
argExitCode = pflag.Int("exit-code", 0, "exit code when failure happens")
argInternalDns = pflag.String("internal-dns", "kubernetes.default", "check dns from pod")
argExternalDns = pflag.String("external-dns", "", "check external dns resolve from pod")
argExternalAddress = pflag.String("external-address", "", "check ping connection to an external address, default: 114.114.114.114")
argNetworkMode = pflag.String("network-mode", "kube-ovn", "The cni plugin current cluster used, default: kube-ovn")
argEnableMetrics = pflag.Bool("enable-metrics", true, "Whether to support metrics query")
argPollTimeout = pflag.Int("ovs.timeout", 2, "Timeout on JSON-RPC requests to OVS.")
argPollInterval = pflag.Int("ovs.poll-interval", 15, "The minimum interval (in seconds) between collections from OVS server.")
argSystemRunDir = pflag.String("system.run.dir", "/var/run/openvswitch", "OVS default run directory.")
argDatabaseVswitchName = pflag.String("database.vswitch.name", "Open_vSwitch", "The name of OVS db.")
argDatabaseVswitchSocketRemote = pflag.String("database.vswitch.socket.remote", "unix:/var/run/openvswitch/db.sock", "JSON-RPC unix socket to OVS db.")
argDatabaseVswitchFileDataPath = pflag.String("database.vswitch.file.data.path", "/etc/openvswitch/conf.db", "OVS db file.")
argDatabaseVswitchFileLogPath = pflag.String("database.vswitch.file.log.path", "/var/log/openvswitch/ovsdb-server.log", "OVS db log file.")
argDatabaseVswitchFilePidPath = pflag.String("database.vswitch.file.pid.path", "/var/run/openvswitch/ovsdb-server.pid", "OVS db process id file.")
argDatabaseVswitchFileSystemIDPath = pflag.String("database.vswitch.file.system.id.path", "/etc/openvswitch/system-id.conf", "OVS system id file.")
argServiceVswitchdFileLogPath = pflag.String("service.vswitchd.file.log.path", "/var/log/openvswitch/ovs-vswitchd.log", "OVS vswitchd daemon log file.")
argServiceVswitchdFilePidPath = pflag.String("service.vswitchd.file.pid.path", "/var/run/openvswitch/ovs-vswitchd.pid", "OVS vswitchd daemon process id file.")
argServiceOvnControllerFileLogPath = pflag.String("service.ovncontroller.file.log.path", "/var/log/ovn/ovn-controller.log", "OVN controller daemon log file.")
argServiceOvnControllerFilePidPath = pflag.String("service.ovncontroller.file.pid.path", "/var/run/ovn/ovn-controller.pid", "OVN controller daemon process id file.")
)
klogFlags := flag.NewFlagSet("klog", flag.ExitOnError)
klog.InitFlags(klogFlags)
// Sync the glog and klog flags.
pflag.CommandLine.VisitAll(func(f1 *pflag.Flag) {
f2 := klogFlags.Lookup(f1.Name)
if f2 != nil {
value := f1.Value.String()
if err := f2.Value.Set(value); err != nil {
util.LogFatalAndExit(err, "failed to set flag")
}
}
})
pflag.CommandLine.AddGoFlagSet(klogFlags)
pflag.CommandLine.AddGoFlagSet(flag.CommandLine)
pflag.Parse()
config := &Configuration{
KubeConfigFile: *argKubeConfigFile,
KubeClient: nil,
Port: *argPort,
DaemonSetNamespace: *argDaemonSetNameSpace,
DaemonSetName: *argDaemonSetName,
Interval: *argInterval,
Mode: *argMode,
ExitCode: *argExitCode,
InternalDNS: *argInternalDns,
ExternalDNS: *argExternalDns,
PodIP: os.Getenv("POD_IP"),
HostIP: os.Getenv("HOST_IP"),
NodeName: os.Getenv("NODE_NAME"),
PodName: os.Getenv("POD_NAME"),
ExternalAddress: *argExternalAddress,
NetworkMode: *argNetworkMode,
EnableMetrics: *argEnableMetrics,
// OVS Monitor
PollTimeout: *argPollTimeout,
PollInterval: *argPollInterval,
SystemRunDir: *argSystemRunDir,
DatabaseVswitchName: *argDatabaseVswitchName,
DatabaseVswitchSocketRemote: *argDatabaseVswitchSocketRemote,
DatabaseVswitchFileDataPath: *argDatabaseVswitchFileDataPath,
DatabaseVswitchFileLogPath: *argDatabaseVswitchFileLogPath,
DatabaseVswitchFilePidPath: *argDatabaseVswitchFilePidPath,
DatabaseVswitchFileSystemIDPath: *argDatabaseVswitchFileSystemIDPath,
ServiceVswitchdFileLogPath: *argServiceVswitchdFileLogPath,
ServiceVswitchdFilePidPath: *argServiceVswitchdFilePidPath,
ServiceOvnControllerFileLogPath: *argServiceOvnControllerFileLogPath,
ServiceOvnControllerFilePidPath: *argServiceOvnControllerFilePidPath,
}
if err := config.initKubeClient(); err != nil {
return nil, err
}
podName := os.Getenv("POD_NAME")
for i := 0; i < 3; i++ {
pod, err := config.KubeClient.CoreV1().Pods(config.DaemonSetNamespace).Get(context.Background(), podName, metav1.GetOptions{})
if err != nil {
klog.Errorf("failed to get self pod %s/%s: %v", config.DaemonSetNamespace, podName, err)
return nil, err
}
if len(pod.Status.PodIPs) != 0 {
config.PodProtocols = make([]string, len(pod.Status.PodIPs))
for i, podIP := range pod.Status.PodIPs {
config.PodProtocols[i] = util.CheckProtocol(podIP.IP)
}
break
}
if pod.Status.ContainerStatuses[0].Ready {
util.LogFatalAndExit(nil, "failed to get IPs of Pod %s/%s", config.DaemonSetNamespace, podName)
}
klog.Infof("cannot get Pod IPs now, waiting Pod to be ready")
time.Sleep(time.Second)
}
if len(config.PodProtocols) == 0 {
util.LogFatalAndExit(nil, "failed to get IPs of Pod %s/%s after 3 attempts", config.DaemonSetNamespace, podName)
}
klog.Infof("pinger config is %+v", config)
return config, nil
}
func (config *Configuration) initKubeClient() error {
var cfg *rest.Config
var err error
if config.KubeConfigFile == "" {
cfg, err = rest.InClusterConfig()
if err != nil {
klog.Errorf("use in cluster config failed %v", err)
return err
}
} else {
cfg, err = clientcmd.BuildConfigFromFlags("", config.KubeConfigFile)
if err != nil {
klog.Errorf("use --kubeconfig %s failed %v", config.KubeConfigFile, err)
return err
}
}
cfg.Timeout = 15 * time.Second
cfg.QPS = 1000
cfg.Burst = 2000
cfg.ContentType = "application/vnd.kubernetes.protobuf"
cfg.AcceptContentTypes = "application/vnd.kubernetes.protobuf,application/json"
kubeClient, err := kubernetes.NewForConfig(cfg)
if err != nil {
klog.Errorf("init kubernetes client failed %v", err)
return err
}
config.KubeClient = kubeClient
return nil
}