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options.go
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options.go
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package options
import (
"net"
"strconv"
"time"
"github.com/spf13/pflag"
)
const DefaultBgpPort = 179
const DefaultBgpHoldTime time.Duration = 90 * time.Second
type KubeRouterConfig struct {
AdvertiseClusterIP bool
AdvertiseExternalIP bool
AdvertiseLoadBalancerIP bool
AdvertiseNodePodCidr bool
AutoMTU bool
BGPGracefulRestart bool
BGPGracefulRestartDeferralTime time.Duration
BGPGracefulRestartTime time.Duration
BGPHoldTime time.Duration
BGPPort uint32
CacheSyncTimeout time.Duration
CleanupConfig bool
ClusterAsn uint
ClusterIPCIDR string
DisableSrcDstCheck bool
EnableCNI bool
EnableiBGP bool
EnableOverlay bool
EnablePodEgress bool
EnablePprof bool
ExcludedCidrs []string
ExternalIPCIDRs []string
FullMeshMode bool
GlobalHairpinMode bool
HealthPort uint16
HelpRequested bool
HostnameOverride string
IPTablesSyncPeriod time.Duration
IpvsGracefulPeriod time.Duration
IpvsGracefulTermination bool
IpvsPermitAll bool
IpvsSyncPeriod time.Duration
Kubeconfig string
MasqueradeAll bool
Master string
MetricsEnabled bool
MetricsPath string
MetricsPort uint16
NodePortBindOnAllIP bool
NodePortRange string
OverlayType string
OverrideNextHop bool
PeerASNs []uint
PeerMultihopTTL uint8
PeerPasswords []string
PeerPasswordsFile string
PeerPorts []uint
PeerRouters []net.IP
RouterID string
RoutesSyncPeriod time.Duration
RunFirewall bool
RunRouter bool
RunServiceProxy bool
RuntimeEndpoint string
Version bool
VLevel string
// FullMeshPassword string
}
func NewKubeRouterConfig() *KubeRouterConfig {
return &KubeRouterConfig{
BGPGracefulRestartDeferralTime: 360 * time.Second,
BGPGracefulRestartTime: 90 * time.Second,
BGPHoldTime: 90 * time.Second,
CacheSyncTimeout: 1 * time.Minute,
ClusterIPCIDR: "10.96.0.0/12",
EnableOverlay: true,
IPTablesSyncPeriod: 5 * time.Minute,
IpvsGracefulPeriod: 30 * time.Second,
IpvsSyncPeriod: 5 * time.Minute,
NodePortRange: "30000-32767",
OverlayType: "subnet",
RoutesSyncPeriod: 5 * time.Minute,
}
}
func (s *KubeRouterConfig) AddFlags(fs *pflag.FlagSet) {
fs.BoolVar(&s.AdvertiseClusterIP, "advertise-cluster-ip", false,
"Add Cluster IP of the service to the RIB so that it gets advertises to the BGP peers.")
fs.BoolVar(&s.AdvertiseExternalIP, "advertise-external-ip", false,
"Add External IP of service to the RIB so that it gets advertised to the BGP peers.")
fs.BoolVar(&s.AdvertiseLoadBalancerIP, "advertise-loadbalancer-ip", false,
"Add LoadbBalancer IP of service status as set by the LB provider to the RIB so that it gets advertised to the BGP peers.")
fs.BoolVar(&s.AdvertiseNodePodCidr, "advertise-pod-cidr", true,
"Add Node's POD cidr to the RIB so that it gets advertised to the BGP peers.")
fs.BoolVar(&s.AutoMTU, "auto-mtu", true,
"Auto detect and set the largest possible MTU for pod interfaces.")
fs.BoolVar(&s.BGPGracefulRestart, "bgp-graceful-restart", false,
"Enables the BGP Graceful Restart capability so that routes are preserved on unexpected restarts")
fs.DurationVar(&s.BGPGracefulRestartDeferralTime, "bgp-graceful-restart-deferral-time", s.BGPGracefulRestartDeferralTime,
"BGP Graceful restart deferral time according to RFC4724 4.1, maximum 18h.")
fs.DurationVar(&s.BGPGracefulRestartTime, "bgp-graceful-restart-time", s.BGPGracefulRestartTime,
"BGP Graceful restart time according to RFC4724 3, maximum 4095s.")
fs.DurationVar(&s.BGPHoldTime, "bgp-holdtime", DefaultBgpHoldTime,
"This parameter is mainly used to modify the holdtime declared to BGP peer. When Kube-router goes down abnormally, the local saving time of BGP route will be affected.Holdtime must be in the range 3s to 18h12m16s.")
fs.Uint32Var(&s.BGPPort, "bgp-port", DefaultBgpPort,
"The port open for incoming BGP connections and to use for connecting with other BGP peers.")
fs.DurationVar(&s.CacheSyncTimeout, "cache-sync-timeout", s.CacheSyncTimeout,
"The timeout for cache synchronization (e.g. '5s', '1m'). Must be greater than 0.")
fs.BoolVar(&s.CleanupConfig, "cleanup-config", false,
"Cleanup iptables rules, ipvs, ipset configuration and exit.")
fs.UintVar(&s.ClusterAsn, "cluster-asn", s.ClusterAsn,
"ASN number under which cluster nodes will run iBGP.")
fs.BoolVar(&s.DisableSrcDstCheck, "disable-source-dest-check", true,
"Disable the source-dest-check attribute for AWS EC2 instances. When this option is false, it must be set some other way.")
fs.BoolVar(&s.EnableCNI, "enable-cni", true,
"Enable CNI plugin. Disable if you want to use kube-router features alongside another CNI plugin.")
fs.BoolVar(&s.EnableiBGP, "enable-ibgp", true,
"Enables peering with nodes with the same ASN, if disabled will only peer with external BGP peers")
fs.BoolVar(&s.EnableOverlay, "enable-overlay", true,
"When enable-overlay is set to true, IP-in-IP tunneling is used for pod-to-pod networking across nodes in different subnets. "+
"When set to false no tunneling is used and routing infrastructure is expected to route traffic for pod-to-pod networking across nodes in different subnets")
fs.BoolVar(&s.EnablePodEgress, "enable-pod-egress", true,
"SNAT traffic from Pods to destinations outside the cluster.")
fs.BoolVar(&s.EnablePprof, "enable-pprof", false,
"Enables pprof for debugging performance and memory leak issues.")
fs.StringSliceVar(&s.ExcludedCidrs, "excluded-cidrs", s.ExcludedCidrs,
"Excluded CIDRs are used to exclude IPVS rules from deletion.")
fs.BoolVar(&s.GlobalHairpinMode, "hairpin-mode", false,
"Add iptables rules for every Service Endpoint to support hairpin traffic.")
fs.Uint16Var(&s.HealthPort, "health-port", 20244, "Health check port, 0 = Disabled")
fs.BoolVarP(&s.HelpRequested, "help", "h", false,
"Print usage information.")
fs.StringVar(&s.HostnameOverride, "hostname-override", s.HostnameOverride,
"Overrides the NodeName of the node. Set this if kube-router is unable to determine your NodeName automatically.")
fs.DurationVar(&s.IPTablesSyncPeriod, "iptables-sync-period", s.IPTablesSyncPeriod,
"The delay between iptables rule synchronizations (e.g. '5s', '1m'). Must be greater than 0.")
fs.DurationVar(&s.IpvsGracefulPeriod, "ipvs-graceful-period", s.IpvsGracefulPeriod,
"The graceful period before removing destinations from IPVS services (e.g. '5s', '1m', '2h22m'). Must be greater than 0.")
fs.BoolVar(&s.IpvsGracefulTermination, "ipvs-graceful-termination", false,
"Enables the experimental IPVS graceful terminaton capability")
fs.BoolVar(&s.IpvsPermitAll, "ipvs-permit-all", true,
"Enables rule to accept all incoming traffic to service VIP's on the node.")
fs.DurationVar(&s.IpvsSyncPeriod, "ipvs-sync-period", s.IpvsSyncPeriod,
"The delay between ipvs config synchronizations (e.g. '5s', '1m', '2h22m'). Must be greater than 0.")
fs.StringVar(&s.Kubeconfig, "kubeconfig", s.Kubeconfig,
"Path to kubeconfig file with authorization information (the master location is set by the master flag).")
fs.BoolVar(&s.MasqueradeAll, "masquerade-all", false,
"SNAT all traffic to cluster IP/node port.")
fs.StringVar(&s.Master, "master", s.Master,
"The address of the Kubernetes API server (overrides any value in kubeconfig).")
fs.StringVar(&s.MetricsPath, "metrics-path", "/metrics", "Prometheus metrics path")
fs.Uint16Var(&s.MetricsPort, "metrics-port", 0, "Prometheus metrics port, (Default 0, Disabled)")
fs.BoolVar(&s.NodePortBindOnAllIP, "nodeport-bindon-all-ip", false,
"For service of NodePort type create IPVS service that listens on all IP's of the node.")
fs.BoolVar(&s.FullMeshMode, "nodes-full-mesh", true,
"Each node in the cluster will setup BGP peering with rest of the nodes.")
fs.StringVar(&s.OverlayType, "overlay-type", s.OverlayType,
"Possible values: subnet,full - "+
"When set to \"subnet\", the default, default \"--enable-overlay=true\" behavior is used. "+
"When set to \"full\", it changes \"--enable-overlay=true\" default behavior so that IP-in-IP tunneling is used for pod-to-pod networking across nodes regardless of the subnet the nodes are in.")
fs.BoolVar(&s.OverrideNextHop, "override-nexthop", false, "Override the next-hop in bgp routes sent to peers with the local ip.")
fs.UintSliceVar(&s.PeerASNs, "peer-router-asns", s.PeerASNs,
"ASN numbers of the BGP peer to which cluster nodes will advertise cluster ip and node's pod cidr.")
fs.IPSliceVar(&s.PeerRouters, "peer-router-ips", s.PeerRouters,
"The ip address of the external router to which all nodes will peer and advertise the cluster ip and pod cidr's.")
fs.Uint8Var(&s.PeerMultihopTTL, "peer-router-multihop-ttl", s.PeerMultihopTTL,
"Enable eBGP multihop supports -- sets multihop-ttl. (Relevant only if ttl >= 2)")
fs.StringSliceVar(&s.PeerPasswords, "peer-router-passwords", s.PeerPasswords,
"Password for authenticating against the BGP peer defined with \"--peer-router-ips\".")
fs.StringVar(&s.PeerPasswordsFile, "peer-router-passwords-file", s.PeerPasswordsFile,
"Path to file containing password for authenticating against the BGP peer defined with \"--peer-router-ips\". --peer-router-passwords will be preferred if both are set.")
fs.UintSliceVar(&s.PeerPorts, "peer-router-ports", s.PeerPorts,
"The remote port of the external BGP to which all nodes will peer. If not set, default BGP port ("+strconv.Itoa(DefaultBgpPort)+") will be used.")
fs.StringVar(&s.RouterID, "router-id", "", "BGP router-id. Must be specified in a ipv6 only cluster.")
fs.DurationVar(&s.RoutesSyncPeriod, "routes-sync-period", s.RoutesSyncPeriod,
"The delay between route updates and advertisements (e.g. '5s', '1m', '2h22m'). Must be greater than 0.")
fs.BoolVar(&s.RunFirewall, "run-firewall", true,
"Enables Network Policy -- sets up iptables to provide ingress firewall for pods.")
fs.BoolVar(&s.RunRouter, "run-router", true,
"Enables Pod Networking -- Advertises and learns the routes to Pods via iBGP.")
fs.BoolVar(&s.RunServiceProxy, "run-service-proxy", true,
"Enables Service Proxy -- sets up IPVS for Kubernetes Services.")
fs.StringVar(&s.RuntimeEndpoint, "runtime-endpoint", "",
"Path to CRI compatible container runtime socket (used for DSR mode). Currently known working with containerd.")
fs.StringVar(&s.ClusterIPCIDR, "service-cluster-ip-range", s.ClusterIPCIDR,
"CIDR value from which service cluster IPs are assigned. Default: 10.96.0.0/12")
fs.StringSliceVar(&s.ExternalIPCIDRs, "service-external-ip-range", s.ExternalIPCIDRs,
"Specify external IP CIDRs that are used for inter-cluster communication (can be specified multiple times)")
fs.StringVar(&s.NodePortRange, "service-node-port-range", s.NodePortRange,
"NodePort range specified with either a hyphen or colon")
fs.StringVarP(&s.VLevel, "v", "v", "0", "log level for V logs")
fs.BoolVarP(&s.Version, "version", "V", false,
"Print version information.")
}