// waitForIface waits for network interface to become available in the system.
func (h Helper) waitForIface(expectedIface string) bool {
for i := 0; i <= h.Agent.waitForIfaceTry; i++ {
log.Tracef(trace.Inside, "Helper: Waiting for interface %s, %d attempt", expectedIface, i)
ifaceList, err := net.Interfaces()
log.Trace(trace.Inside, "Agent: Entering podUpHandlerAsync()")
if err != nil {
log.Warn("Warning: Helper: failed to read net.Interfaces()")
}
for iface := range ifaceList {
if ifaceList[iface].Name == expectedIface {
return true
}
}
time.Sleep(10 * time.Second)
}
return false
}
// podUpHandlerAsync does a number of operations on given endpoint to ensure
// it's connected:
// 1. Ensures interface is ready
// 2. Creates ip route pointing new interface
// 3. Provisions firewall rules
func (a *Agent) podUpHandlerAsync(netReq NetworkRequest) error {
log.Trace(trace.Private, "Agent: Entering podUpHandlerAsync()")
currentProvider := a.getFirewallType()
netif := netReq.NetIf
if netif.Name == "" {
return agentErrorString("Agent: Interface name required")
}
if !a.Helper.waitForIface(netif.Name) {
// TODO should we resubmit failed interface in queue for later
// retry ? ... considering openstack will give up as well after
// timeout
msg := fmt.Sprintf("Requested interface not available in time - %s", netif.Name)
log.Warn("Agent: ", msg)
return agentErrorString(msg)
}
log.Infof("Agent: Creating endpoint routes - %s", netif.Name)
if err := a.Helper.ensureRouteToEndpoint(&netif); err != nil {
log.Error(agentError(err))
return agentError(err)
}
log.Infof("Agent: Provisioning firewall - %s", netif.Name)
fw, err := firewall.NewFirewall(currentProvider)
if err != nil {
return err
}
err = fw.Init(a.Helper.Executor, a.store, a.networkConfig)
if err != nil {
return err
}
if err1 := fw.SetEndpoint(netif); err1 != nil {
log.Error(agentError(err))
return agentError(err)
}
var rules RuleSet
switch currentProvider {
case firewall.ShellexProvider:
rules = KubeShellXRules
case firewall.IPTsaveProvider:
rules = KubeSaveRestoreRules
default:
err := fmt.Errorf("Unkown firewall provider in podUpHandler")
log.Error(agentError(err))
return agentError(err)
}
if err := prepareFirewallRules(fw, a.networkConfig, rules, currentProvider); err != nil {
log.Error(agentError(err))
return agentError(err)
}
if err := fw.ProvisionEndpoint(); err != nil {
log.Error(agentError(err))
return agentError(err)
}
log.Trace(trace.Inside, "Agent: All good", netif)
return nil
}