func()

in pkg/ipamd/ipamd.go [871:923]
47 lines of code
9 McCabe index (conditional complexity)

func (c *IPAMContext) tryAllocateENI(ctx context.Context) error {
	var securityGroups []*string
	var eniCfgSubnet string

	if c.useCustomNetworking {
		eniCfg, err := eniconfig.MyENIConfig(ctx, c.k8sClient)
		if err != nil {
			log.Errorf("Failed to get pod ENI config")
			return err
		}

		log.Infof("ipamd: using custom network config: %v, %s", eniCfg.SecurityGroups, eniCfg.Subnet)
		for _, sgID := range eniCfg.SecurityGroups {
			log.Debugf("Found security-group id: %s", sgID)
			securityGroups = append(securityGroups, aws.String(sgID))
		}
		eniCfgSubnet = eniCfg.Subnet
	}

	resourcesToAllocate := c.GetENIResourcesToAllocate()
	if resourcesToAllocate > 0 {
		eni, err := c.awsClient.AllocENI(c.useCustomNetworking, securityGroups, eniCfgSubnet, resourcesToAllocate)
		if err != nil {
			log.Errorf("Failed to increase pool size due to not able to allocate ENI %v", err)
			ipamdErrInc("increaseIPPoolAllocENI")
			log.Warnf("Failed to allocate %d IP addresses on an ENI: %v", resourcesToAllocate, err)
			if containsInsufficientCIDRsOrSubnetIPs(err) {
				ipamdErrInc("increaseIPPoolAllocIPAddressesFailed")
				log.Errorf("Unable to attach IPs/Prefixes for the ENI, subnet doesn't seem to have enough IPs/Prefixes. Consider using new subnet or carve a reserved range using create-subnet-cidr-reservation")
				c.lastInsufficientCidrError = time.Now()
			}
			return err
		}

		eniMetadata, err := c.awsClient.WaitForENIAndIPsAttached(eni, resourcesToAllocate)
		if err != nil {
			ipamdErrInc("increaseIPPoolwaitENIAttachedFailed")
			log.Errorf("Failed to increase pool size: Unable to discover attached ENI from metadata service %v", err)
			return err
		}

		// The CNI does not create trunk or EFA ENIs, so they will always be false here
		err = c.setupENI(eni, eniMetadata, false, false)
		if err != nil {
			ipamdErrInc("increaseIPPoolsetupENIFailed")
			log.Errorf("Failed to increase pool size: %v", err)
			return err
		}
	} else {
		log.Debugf("Did not allocate ENI since IPs/Prefixes needed were not greater than 0. IPs/Prefixes needed: %d", resourcesToAllocate)
	}
	return nil
}