func()

in pkg/ipamd/ipamd.go [2367:2394]

• 22 lines of code
• 11 McCabe index (conditional complexity)

func (c *IPAMContext) isConfigValid() bool {
	// Validate that only one among v4 and v6 is enabled.
	if c.enableIPv4 && c.enableIPv6 {
		log.Errorf("IPv4 and IPv6 are both enabled. VPC CNI currently does not support dual stack mode")
		return false
	} else if !c.enableIPv4 && !c.enableIPv6 {
		log.Errorf("IPv4 and IPv6 are both disabled. One of them have to be enabled")
		return false
	}

	// Validate PD mode is enabled if VPC CNI is operating in IPv6 mode. Custom networking is not supported in IPv6 mode.
	if c.enableIPv6 && (c.useCustomNetworking || !c.enablePrefixDelegation) {
		log.Errorf("IPv6 is supported only in Prefix Delegation mode. Custom Networking is not supported in IPv6 mode. Please set the env variables accordingly.")
		return false
	}

	// Validate Prefix Delegation against v4 and v6 modes.
	if c.enablePrefixDelegation && !c.awsClient.IsPrefixDelegationSupported() {
		if c.enableIPv6 {
			log.Errorf("Prefix Delegation is not supported on non-nitro instance %s. IPv6 is only supported in Prefix delegation Mode. ", c.awsClient.GetInstanceType())
			return false
		}
		log.Warnf("Prefix delegation is not supported on non-nitro instance %s hence falling back to default (secondary IP) mode", c.awsClient.GetInstanceType())
		c.enablePrefixDelegation = false
	}

	return true
}