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helper.go
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helper.go
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// Copyright (c) 2018 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package helper
import (
"fmt"
"k8s.io/utils/pointer"
api "github.com/gardener/gardener-extension-provider-alicloud/pkg/apis/alicloud"
)
// FindVSwitchForPurposeAndZone takes a list of vswitches and tries to find the first entry
// whose purpose and zone matches with the given purpose and zone. If no such entry is found then
// an error will be returned.
func FindVSwitchForPurposeAndZone(vswitches []api.VSwitch, purpose api.Purpose, zone string) (*api.VSwitch, error) {
for _, vswitch := range vswitches {
if vswitch.Purpose == purpose && vswitch.Zone == zone {
return &vswitch, nil
}
}
return nil, fmt.Errorf("no vswitch with purpose %q in zone %q found", purpose, zone)
}
// FindVSwitchForPurpose takes a list of vswitches and tries to find the first entry
// whose purpose matches with the given purpose.
// If no such entry is found then an error will be returned.
func FindVSwitchForPurpose(vswitches []api.VSwitch, purpose api.Purpose) (*api.VSwitch, error) {
for _, vswitch := range vswitches {
if vswitch.Purpose == purpose {
return &vswitch, nil
}
}
return nil, fmt.Errorf("no vswitch with purpose %q found", purpose)
}
// FindSecurityGroupByPurpose takes a list of security groups and tries to find the first entry
// whose purpose matches with the given purpose. If no such entry is found then an error will be
// returned.
func FindSecurityGroupByPurpose(securityGroups []api.SecurityGroup, purpose api.Purpose) (*api.SecurityGroup, error) {
for _, securityGroup := range securityGroups {
if securityGroup.Purpose == purpose {
return &securityGroup, nil
}
}
return nil, fmt.Errorf("cannot find security group with purpose %q", purpose)
}
func matchEncryptedFlag(encrypted *bool, expectEncrypted bool) bool {
checkedVal := encrypted
if checkedVal == nil {
checkedVal = pointer.Bool(false)
}
return *checkedVal == expectEncrypted
}
// FindMachineImage takes a list of machine images and tries to find the first entry
// whose name, version and encrypted flag matches with the given name, version and encrypted flag.
// If no such entry is found then an error will be returned.
func FindMachineImage(machineImages []api.MachineImage, imageName, imageVersion string, encrypted bool) (*api.MachineImage, error) {
for _, machineImage := range machineImages {
if machineImage.Name == imageName && machineImage.Version == imageVersion && matchEncryptedFlag(machineImage.Encrypted, encrypted) {
return &machineImage, nil
}
}
if encrypted {
return nil, fmt.Errorf("no encrypted machine image name %q in version %q found", imageName, imageVersion)
}
return nil, fmt.Errorf("no machine image name %q in version %q found", imageName, imageVersion)
}
// AppendMachineImage will append a given MachineImage to an existing image list.
// If a same image (by checking name, version and encrypted flag) already exists, nothing happens
func AppendMachineImage(machineImages []api.MachineImage, machineImage api.MachineImage) []api.MachineImage {
expectEncripted := machineImage.Encrypted
if expectEncripted == nil {
expectEncripted = pointer.Bool(false)
}
if _, err := FindMachineImage(machineImages, machineImage.Name, machineImage.Version, *expectEncripted); err != nil {
return append(machineImages, machineImage)
}
return machineImages
}
// FindImageForRegionFromCloudProfile takes a list of machine images, and the desired image name, version, and region.
// It tries to find the image with the given name and version in the desired region.
// If no image is found then an error is returned.
func FindImageForRegionFromCloudProfile(cloudProfileConfig *api.CloudProfileConfig, imageName, imageVersion, regionName string) (string, error) {
if cloudProfileConfig != nil {
for _, machineImage := range cloudProfileConfig.MachineImages {
if machineImage.Name != imageName {
continue
}
for _, version := range machineImage.Versions {
if imageVersion != version.Version {
continue
}
for _, mapping := range version.Regions {
if regionName == mapping.Name {
return mapping.ID, nil
}
}
}
}
}
return "", fmt.Errorf("could not find an image for name %q in version %q", imageName, imageVersion)
}