340 lines
10 KiB
Go
340 lines
10 KiB
Go
package oci
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import (
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"context"
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"errors"
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"fmt"
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"math"
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"math/rand"
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"net/http"
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"regexp"
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"sync/atomic"
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"time"
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"github.com/oracle/oci-go-sdk/v36/common"
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core "github.com/oracle/oci-go-sdk/v36/core"
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)
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// driverOCI implements the Driver interface and communicates with Oracle
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// OCI.
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type driverOCI struct {
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computeClient core.ComputeClient
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vcnClient core.VirtualNetworkClient
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cfg *Config
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context context.Context
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}
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var retryPolicy = &common.RetryPolicy{
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MaximumNumberAttempts: 10,
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ShouldRetryOperation: func(res common.OCIOperationResponse) bool {
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var e common.ServiceError
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if errors.As(res.Error, &e) {
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switch e.GetHTTPStatusCode() {
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case http.StatusTooManyRequests, http.StatusInternalServerError, http.StatusServiceUnavailable:
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return true
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}
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}
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return false
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},
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NextDuration: func(res common.OCIOperationResponse) time.Duration {
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x := uint64(res.AttemptNumber)
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d := time.Duration(math.Pow(2, float64(atomic.LoadUint64(&x)))) * time.Second
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j := time.Duration(rand.Float64()*(2000)) * time.Millisecond
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w := d + j
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return w
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},
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}
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var requestMetadata = common.RequestMetadata{
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RetryPolicy: retryPolicy,
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}
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// NewDriverOCI Creates a new driverOCI with a connected compute client and a connected vcn client.
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func NewDriverOCI(cfg *Config) (Driver, error) {
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coreClient, err := core.NewComputeClientWithConfigurationProvider(cfg.configProvider)
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if err != nil {
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return nil, err
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}
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vcnClient, err := core.NewVirtualNetworkClientWithConfigurationProvider(cfg.configProvider)
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if err != nil {
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return nil, err
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}
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return &driverOCI{
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computeClient: coreClient,
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vcnClient: vcnClient,
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cfg: cfg,
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}, nil
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}
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// CreateInstance creates a new compute instance.
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func (d *driverOCI) CreateInstance(ctx context.Context, publicKey string) (string, error) {
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metadata := map[string]string{
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"ssh_authorized_keys": publicKey,
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}
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if d.cfg.Metadata != nil {
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for key, value := range d.cfg.Metadata {
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metadata[key] = value
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}
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}
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if d.cfg.UserData != "" {
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metadata["user_data"] = d.cfg.UserData
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}
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// Create VNIC details for instance
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CreateVnicDetails := core.CreateVnicDetails{
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AssignPublicIp: d.cfg.CreateVnicDetails.AssignPublicIp,
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DisplayName: d.cfg.CreateVnicDetails.DisplayName,
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HostnameLabel: d.cfg.CreateVnicDetails.HostnameLabel,
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NsgIds: d.cfg.CreateVnicDetails.NsgIds,
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PrivateIp: d.cfg.CreateVnicDetails.PrivateIp,
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SkipSourceDestCheck: d.cfg.CreateVnicDetails.SkipSourceDestCheck,
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SubnetId: d.cfg.CreateVnicDetails.SubnetId,
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DefinedTags: d.cfg.CreateVnicDetails.DefinedTags,
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FreeformTags: d.cfg.CreateVnicDetails.FreeformTags,
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}
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// Determine base image ID
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var imageId *string
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if d.cfg.BaseImageID != "" {
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imageId = &d.cfg.BaseImageID
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} else {
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// Pull images and determine which image ID to use, if BaseImageId not specified
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response, err := d.computeClient.ListImages(ctx, core.ListImagesRequest{
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CompartmentId: d.cfg.BaseImageFilter.CompartmentId,
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DisplayName: d.cfg.BaseImageFilter.DisplayName,
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OperatingSystem: d.cfg.BaseImageFilter.OperatingSystem,
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OperatingSystemVersion: d.cfg.BaseImageFilter.OperatingSystemVersion,
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Shape: d.cfg.BaseImageFilter.Shape,
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LifecycleState: "AVAILABLE",
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SortBy: "TIMECREATED",
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SortOrder: "DESC",
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RequestMetadata: requestMetadata,
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})
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if err != nil {
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return "", err
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}
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if len(response.Items) == 0 {
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return "", errors.New("base_image_filter returned no images")
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}
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if d.cfg.BaseImageFilter.DisplayNameSearch != nil {
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// Return most recent image that matches regex
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imageNameRegex, err := regexp.Compile(*d.cfg.BaseImageFilter.DisplayNameSearch)
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if err != nil {
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return "", err
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}
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for _, image := range response.Items {
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if imageNameRegex.MatchString(*image.DisplayName) {
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imageId = image.Id
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break
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}
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}
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if imageId == nil {
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return "", errors.New("No image matched display_name_search criteria")
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}
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} else {
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// If no regex provided, simply return most recent image pulled
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imageId = response.Items[0].Id
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}
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}
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// Create Source details which will be used to Launch Instance
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InstanceSourceDetails := core.InstanceSourceViaImageDetails{
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ImageId: imageId,
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BootVolumeSizeInGBs: &d.cfg.BootVolumeSizeInGBs,
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}
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// Build instance details
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instanceDetails := core.LaunchInstanceDetails{
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AvailabilityDomain: &d.cfg.AvailabilityDomain,
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CompartmentId: &d.cfg.CompartmentID,
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CreateVnicDetails: &CreateVnicDetails,
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DefinedTags: d.cfg.InstanceDefinedTags,
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DisplayName: d.cfg.InstanceName,
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FreeformTags: d.cfg.InstanceTags,
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Shape: &d.cfg.Shape,
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SourceDetails: InstanceSourceDetails,
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Metadata: metadata,
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}
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if d.cfg.ShapeConfig.Ocpus != nil {
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LaunchInstanceShapeConfigDetails := core.LaunchInstanceShapeConfigDetails{
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Ocpus: d.cfg.ShapeConfig.Ocpus,
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MemoryInGBs: d.cfg.ShapeConfig.MemoryInGBs,
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}
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instanceDetails.ShapeConfig = &LaunchInstanceShapeConfigDetails
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}
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instance, err := d.computeClient.LaunchInstance(context.TODO(), core.LaunchInstanceRequest{
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LaunchInstanceDetails: instanceDetails,
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RequestMetadata: requestMetadata,
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})
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if err != nil {
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return "", err
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}
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return *instance.Id, nil
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}
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// CreateImage creates a new custom image.
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func (d *driverOCI) CreateImage(ctx context.Context, id string) (core.Image, error) {
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res, err := d.computeClient.CreateImage(ctx, core.CreateImageRequest{CreateImageDetails: core.CreateImageDetails{
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CompartmentId: &d.cfg.ImageCompartmentID,
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InstanceId: &id,
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DisplayName: &d.cfg.ImageName,
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FreeformTags: d.cfg.Tags,
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DefinedTags: d.cfg.DefinedTags,
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LaunchMode: core.CreateImageDetailsLaunchModeEnum(d.cfg.LaunchMode),
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},
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RequestMetadata: requestMetadata,
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})
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if err != nil {
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return core.Image{}, err
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}
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return res.Image, nil
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}
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// DeleteImage deletes a custom image.
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func (d *driverOCI) DeleteImage(ctx context.Context, id string) error {
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_, err := d.computeClient.DeleteImage(ctx, core.DeleteImageRequest{
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ImageId: &id,
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RequestMetadata: requestMetadata,
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})
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return err
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}
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// GetInstanceIP returns the public or private IP corresponding to the given instance id.
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func (d *driverOCI) GetInstanceIP(ctx context.Context, id string) (string, error) {
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vnics, err := d.computeClient.ListVnicAttachments(ctx, core.ListVnicAttachmentsRequest{
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InstanceId: &id,
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CompartmentId: &d.cfg.CompartmentID,
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RequestMetadata: requestMetadata,
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})
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if err != nil {
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return "", err
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}
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if len(vnics.Items) == 0 {
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return "", errors.New("instance has zero VNICs")
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}
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vnic, err := d.vcnClient.GetVnic(ctx, core.GetVnicRequest{
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VnicId: vnics.Items[0].VnicId,
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RequestMetadata: requestMetadata,
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})
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if err != nil {
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return "", fmt.Errorf("Error getting VNIC details: %s", err)
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}
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if d.cfg.UsePrivateIP {
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return *vnic.PrivateIp, nil
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}
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if vnic.PublicIp == nil {
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return "", fmt.Errorf("Error getting VNIC Public Ip for: %s", id)
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}
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return *vnic.PublicIp, nil
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}
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func (d *driverOCI) GetInstanceInitialCredentials(ctx context.Context, id string) (string, string, error) {
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credentials, err := d.computeClient.GetWindowsInstanceInitialCredentials(ctx, core.GetWindowsInstanceInitialCredentialsRequest{
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InstanceId: &id,
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RequestMetadata: requestMetadata,
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})
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if err != nil {
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return "", "", err
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}
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return *credentials.InstanceCredentials.Username, *credentials.InstanceCredentials.Password, err
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}
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// TerminateInstance terminates a compute instance.
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func (d *driverOCI) TerminateInstance(ctx context.Context, id string) error {
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_, err := d.computeClient.TerminateInstance(ctx, core.TerminateInstanceRequest{
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InstanceId: &id,
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RequestMetadata: requestMetadata,
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})
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return err
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}
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// WaitForImageCreation waits for a provisioning custom image to reach the
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// "AVAILABLE" state.
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func (d *driverOCI) WaitForImageCreation(ctx context.Context, id string) error {
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return waitForResourceToReachState(
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func(string) (string, error) {
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image, err := d.computeClient.GetImage(ctx, core.GetImageRequest{
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ImageId: &id,
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RequestMetadata: requestMetadata,
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})
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if err != nil {
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return "", err
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}
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return string(image.LifecycleState), nil
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},
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id,
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[]string{"PROVISIONING"},
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"AVAILABLE",
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0, //Unlimited Retries
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5*time.Second, //5 second wait between retries
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)
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}
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// WaitForInstanceState waits for an instance to reach the a given terminal
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// state.
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func (d *driverOCI) WaitForInstanceState(ctx context.Context, id string, waitStates []string, terminalState string) error {
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return waitForResourceToReachState(
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func(string) (string, error) {
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instance, err := d.computeClient.GetInstance(ctx, core.GetInstanceRequest{
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InstanceId: &id,
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RequestMetadata: requestMetadata,
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})
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if err != nil {
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return "", err
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}
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return string(instance.LifecycleState), nil
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},
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id,
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waitStates,
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terminalState,
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0, //Unlimited Retries
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5*time.Second, //5 second wait between retries
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)
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}
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// WaitForResourceToReachState checks the response of a request through a
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// polled get and waits until the desired state or until the max retried has
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// been reached.
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func waitForResourceToReachState(getResourceState func(string) (string, error), id string, waitStates []string, terminalState string, maxRetries int, waitDuration time.Duration) error {
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for i := 0; maxRetries == 0 || i < maxRetries; i++ {
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state, err := getResourceState(id)
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if err != nil {
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return err
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}
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if stringSliceContains(waitStates, state) {
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time.Sleep(waitDuration)
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continue
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} else if state == terminalState {
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return nil
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}
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return fmt.Errorf("Unexpected resource state %q, expecting a waiting state %s or terminal state %q ", state, waitStates, terminalState)
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}
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return fmt.Errorf("Maximum number of retries (%d) exceeded; resource did not reach state %q", maxRetries, terminalState)
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}
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// stringSliceContains loops through a slice of strings returning a boolean
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// based on whether a given value is contained in the slice.
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func stringSliceContains(slice []string, value string) bool {
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for _, elem := range slice {
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if elem == value {
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return true
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}
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}
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return false
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}
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