INNER CODE UNIT · Go

configureIPv6Settings

aws/amazon-vpc-cni-k8s · cmd/aws-vpc-cni-init/main.go:103

func configureIPv6Settings(procSys procsyswrapper.ProcSys, primaryIF string) error {
	var err error
	// Enable IPv6 when environment variable is set
	// Note that IPv6 is not disabled when environment variable is unset. This is omitted to preserve default host semantics.
	enableIPv6 := utils.GetBoolAsStringEnvVar(envEnableIPv6, defaultEnableIPv6)
	if enableIPv6 {
		entry := "net/ipv6/conf/all/disable_ipv6"
		err = procSys.Set(entry, "0")
		if err != nil {
			return errors.Wrap(err, "Failed to set disable_ipv6 to 0")
		}
		val, _ := procSys.Get(entry)
		log.Infof("Updated %s to %s", entry, val)
	}
	// Check if IPv6 egress support is enabled in IPv4 cluster.
	ipv6EgressEnabled := utils.GetBoolAsStringEnvVar(envEgressV6, defaultEnableIPv6Egress)
	if enableIPv6 || ipv6EgressEnabled {
		// Enable IPv6 forwarding on all interfaces by default

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