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nutanixmachineconfig.go
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nutanixmachineconfig.go
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package v1alpha1
import (
"fmt"
"io/ioutil"
"strings"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"sigs.k8s.io/yaml"
)
// NutanixIdentifierType is an enumeration of different resource identifier types.
type NutanixIdentifierType string
func (c NutanixIdentifierType) String() string {
return string(c)
}
const (
// NutanixMachineConfigKind is the kind for a NutanixMachineConfig.
NutanixMachineConfigKind = "NutanixMachineConfig"
// NutanixIdentifierUUID is a resource identifier identifying the object by UUID.
NutanixIdentifierUUID NutanixIdentifierType = "uuid"
// NutanixIdentifierName is a resource identifier identifying the object by Name.
NutanixIdentifierName NutanixIdentifierType = "name"
defaultNutanixOSFamily = Ubuntu
defaultNutanixSystemDiskSizeGi = "40Gi"
defaultNutanixMemorySizeGi = "4Gi"
defaultNutanixVCPUsPerSocket = 1
defaultNutanixVCPUSockets = 2
// DefaultNutanixMachineConfigUser is the default username we set in machine config.
DefaultNutanixMachineConfigUser string = "eksa"
)
// NutanixResourceIdentifier holds the identity of a Nutanix Prism resource (cluster, image, subnet, etc.)
//
// +union.
type NutanixResourceIdentifier struct {
// Type is the identifier type to use for this resource.
// +kubebuilder:validation:Required
// +kubebuilder:validation:Enum:=uuid;name
Type NutanixIdentifierType `json:"type"`
// uuid is the UUID of the resource in the PC.
// +optional
UUID *string `json:"uuid,omitempty"`
// name is the resource name in the PC
// +optional
Name *string `json:"name,omitempty"`
}
// NutanixMachineConfigGenerateOpt is a functional option that can be passed to NewNutanixMachineConfigGenerate to
// customize the generated machine config
//
// +kubebuilder:object:generate=false
type NutanixMachineConfigGenerateOpt func(config *NutanixMachineConfigGenerate)
// NewNutanixMachineConfigGenerate returns a new instance of NutanixMachineConfigGenerate
// used for generating yaml for generate clusterconfig command.
func NewNutanixMachineConfigGenerate(name string, opts ...NutanixMachineConfigGenerateOpt) *NutanixMachineConfigGenerate {
enterNameString := "<Enter %s name here>"
machineConfig := &NutanixMachineConfigGenerate{
TypeMeta: metav1.TypeMeta{
Kind: NutanixMachineConfigKind,
APIVersion: SchemeBuilder.GroupVersion.String(),
},
ObjectMeta: ObjectMeta{
Name: name,
},
Spec: NutanixMachineConfigSpec{
OSFamily: defaultNutanixOSFamily,
Users: []UserConfiguration{
{
Name: DefaultNutanixMachineConfigUser,
SshAuthorizedKeys: []string{"ssh-rsa AAAA..."},
},
},
VCPUsPerSocket: defaultNutanixVCPUsPerSocket,
VCPUSockets: defaultNutanixVCPUSockets,
MemorySize: resource.MustParse(defaultNutanixMemorySizeGi),
Image: NutanixResourceIdentifier{Type: NutanixIdentifierName, Name: func() *string { s := fmt.Sprintf(enterNameString, "image"); return &s }()},
Cluster: NutanixResourceIdentifier{Type: NutanixIdentifierName, Name: func() *string { s := fmt.Sprintf(enterNameString, "Prism Element cluster"); return &s }()},
Subnet: NutanixResourceIdentifier{Type: NutanixIdentifierName, Name: func() *string { s := fmt.Sprintf(enterNameString, "subnet"); return &s }()},
SystemDiskSize: resource.MustParse(defaultNutanixSystemDiskSizeGi),
},
}
for _, opt := range opts {
opt(machineConfig)
}
return machineConfig
}
func (c *NutanixMachineConfigGenerate) APIVersion() string {
return c.TypeMeta.APIVersion
}
func (c *NutanixMachineConfigGenerate) Kind() string {
return c.TypeMeta.Kind
}
func (c *NutanixMachineConfigGenerate) Name() string {
return c.ObjectMeta.Name
}
func GetNutanixMachineConfigs(fileName string) (map[string]*NutanixMachineConfig, error) {
configs := make(map[string]*NutanixMachineConfig)
content, err := ioutil.ReadFile(fileName)
if err != nil {
return nil, fmt.Errorf("unable to read file due to: %v", err)
}
for _, c := range strings.Split(string(content), YamlSeparator) {
config := NutanixMachineConfig{
TypeMeta: metav1.TypeMeta{},
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{},
},
}
if err = yaml.UnmarshalStrict([]byte(c), &config); err == nil {
if config.Kind == NutanixMachineConfigKind {
configs[config.Name] = &config
continue
}
}
_ = yaml.Unmarshal([]byte(c), &config) // this is to check if there is a bad spec in the file
if config.Kind == NutanixMachineConfigKind {
return nil, fmt.Errorf("unable to unmarshall content from file due to: %v", err)
}
}
if len(configs) == 0 {
return nil, fmt.Errorf("unable to find kind %v in file", NutanixMachineConfigKind)
}
return configs, nil
}
func setNutanixMachineConfigDefaults(machineConfig *NutanixMachineConfig) {
initUser := UserConfiguration{
Name: DefaultNutanixMachineConfigUser,
SshAuthorizedKeys: []string{""},
}
if machineConfig.Spec.Users == nil || len(machineConfig.Spec.Users) <= 0 {
machineConfig.Spec.Users = []UserConfiguration{initUser}
}
user := machineConfig.Spec.Users[0]
if user.Name == "" {
machineConfig.Spec.Users[0].Name = DefaultNutanixMachineConfigUser
}
if user.SshAuthorizedKeys == nil || len(user.SshAuthorizedKeys) <= 0 {
machineConfig.Spec.Users[0].SshAuthorizedKeys = []string{""}
}
if machineConfig.Spec.OSFamily == "" {
machineConfig.Spec.OSFamily = defaultNutanixOSFamily
}
}