INNER CODE UNIT · Go

validateEnvVars

aws/amazon-vpc-cni-k8s · cmd/aws-vpc-cni/main.go:337

func validateEnvVars() bool {
	pluginLogFile := utils.GetEnv(envPluginLogFile, defaultPluginLogFile)
	if pluginLogFile == "stdout" {
		log.Errorf("AWS_VPC_K8S_PLUGIN_LOG_FILE cannot be set to stdout")
		return false
	}

	// Validate that veth prefix is less than or equal to four characters and not in reserved set: (eth, lo, vlan)
	vethPrefix := utils.GetEnv(envVethPrefix, defaultVethPrefix)
	if len(vethPrefix) > 4 {
		log.Errorf("AWS_VPC_K8S_CNI_VETHPREFIX cannot be longer than 4 characters")
		return false
	}

	if vethPrefix == "eth" || vethPrefix == "lo" || vethPrefix == "vlan" {
		log.Errorf("AWS_VPC_K8S_CNI_VETHPREFIX cannot be set to reserved values 'eth', 'vlan', or 'lo'")
		return false
	}

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