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const DefaultVolumeType = "gp2"

    Default volume type for newly created Volumes TODO: Remove when user/admin can configure volume types and thus we don't need hardcoded defaults.

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    const MaxReadThenCreateRetries = 30

      We sometimes read to see if something exists; then try to create it if we didn't find it This can fail once in a consistent system if done in parallel In an eventually consistent system, it could fail unboundedly MaxReadThenCreateRetries sets the maximum number of attempts we will make

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      const ProviderName = "aws"
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      const TagNameKubernetesCluster = "KubernetesCluster"

        The tag name we use to differentiate multiple logically independent clusters running in the same AZ


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        type ASG

          This is a simple pass-through of the Autoscaling client interface, which allows for testing

          type AWSCloud

          type AWSCloud struct {
          	// contains filtered or unexported fields

            AWSCloud is an implementation of Interface, LoadBalancer and Instances for Amazon Web Services.

            func (*AWSCloud) AddSSHKeyToAllInstances

            func (self *AWSCloud) AddSSHKeyToAllInstances(user string, keyData []byte) error

            func (*AWSCloud) AttachDisk

            func (c *AWSCloud) AttachDisk(instanceName string, diskName string, readOnly bool) (string, error)

              Implements Volumes.AttachDisk

              func (*AWSCloud) Clusters

              func (aws *AWSCloud) Clusters() (cloudprovider.Clusters, bool)

              func (*AWSCloud) Configure

              func (v *AWSCloud) Configure(name string, spec *api.NodeSpec) error

              func (*AWSCloud) CreateRoute

              func (s *AWSCloud) CreateRoute(clusterName string, nameHint string, route *cloudprovider.Route) error

                CreateRoute implements Routes.CreateRoute Create the described route

                func (*AWSCloud) CreateVolume

                func (s *AWSCloud) CreateVolume(volumeOptions *VolumeOptions) (string, error)

                  Implements Volumes.CreateVolume

                  func (*AWSCloud) CurrentNodeName

                  func (a *AWSCloud) CurrentNodeName(hostname string) (string, error)

                  func (*AWSCloud) DeleteRoute

                  func (s *AWSCloud) DeleteRoute(clusterName string, route *cloudprovider.Route) error

                    DeleteRoute implements Routes.DeleteRoute Delete the specified route

                    func (*AWSCloud) DeleteVolume

                    func (aws *AWSCloud) DeleteVolume(volumeName string) error

                      Implements Volumes.DeleteVolume

                      func (*AWSCloud) DescribeInstanceGroup

                      func (a *AWSCloud) DescribeInstanceGroup(instanceGroupName string) (InstanceGroupInfo, error)

                        Implement InstanceGroups.DescribeInstanceGroup Queries the cloud provider for information about the specified instance group

                        func (*AWSCloud) DetachDisk

                        func (aws *AWSCloud) DetachDisk(instanceName string, diskName string) error

                          Implements Volumes.DetachDisk

                          func (*AWSCloud) EnsureLoadBalancer

                          func (s *AWSCloud) EnsureLoadBalancer(name, region string, publicIP net.IP, ports []*api.ServicePort, hosts []string, affinity api.ServiceAffinity) (*api.LoadBalancerStatus, error)

                            EnsureTCPLoadBalancer implements TCPLoadBalancer.EnsureTCPLoadBalancer TODO(justinsb) It is weird that these take a region. I suspect it won't work cross-region anyway.

                            func (*AWSCloud) EnsureLoadBalancerDeleted

                            func (s *AWSCloud) EnsureLoadBalancerDeleted(name, region string) error

                              EnsureLoadBalancerDeleted implements LoadBalancer.EnsureLoadBalancerDeleted.

                              func (*AWSCloud) ExternalID

                              func (aws *AWSCloud) ExternalID(name string) (string, error)

                                ExternalID returns the cloud provider ID of the specified instance (deprecated). Note that if the instance does not exist or is no longer running, we must return ("", cloudprovider.InstanceNotFound)

                                func (*AWSCloud) GetLoadBalancer

                                func (s *AWSCloud) GetLoadBalancer(name, region string) (*api.LoadBalancerStatus, bool, error)

                                  GetLoadBalancer is an implementation of LoadBalancer.GetLoadBalancer

                                  func (*AWSCloud) GetVolumeLabels

                                  func (c *AWSCloud) GetVolumeLabels(volumeName string) (map[string]string, error)

                                    Implements Volumes.GetVolumeLabels

                                    func (*AWSCloud) GetZone

                                    func (self *AWSCloud) GetZone() (cloudprovider.Zone, error)

                                      GetZone implements Zones.GetZone

                                      func (*AWSCloud) InstanceID

                                      func (aws *AWSCloud) InstanceID(name string) (string, error)

                                        InstanceID returns the cloud provider ID of the specified instance.

                                        func (*AWSCloud) Instances

                                        func (aws *AWSCloud) Instances() (cloudprovider.Instances, bool)

                                          Instances returns an implementation of Instances for Amazon Web Services.

                                          func (*AWSCloud) List

                                          func (aws *AWSCloud) List(filter string) ([]string, error)

                                            List is an implementation of Instances.List.

                                            func (*AWSCloud) ListRoutes

                                            func (s *AWSCloud) ListRoutes(clusterName string) ([]*cloudprovider.Route, error)

                                              ListRoutes implements Routes.ListRoutes List all routes that match the filter

                                              func (*AWSCloud) LoadBalancer

                                              func (s *AWSCloud) LoadBalancer() (cloudprovider.LoadBalancer, bool)

                                                LoadBalancer returns an implementation of LoadBalancer for Amazon Web Services.

                                                func (*AWSCloud) NodeAddresses

                                                func (aws *AWSCloud) NodeAddresses(name string) ([]api.NodeAddress, error)

                                                  NodeAddresses is an implementation of Instances.NodeAddresses.

                                                  func (*AWSCloud) ProviderName

                                                  func (aws *AWSCloud) ProviderName() string

                                                    ProviderName returns the cloud provider ID.

                                                    func (*AWSCloud) Release

                                                    func (v *AWSCloud) Release(name string) error

                                                    func (*AWSCloud) ResizeInstanceGroup

                                                    func (a *AWSCloud) ResizeInstanceGroup(instanceGroupName string, size int) error

                                                      Implement InstanceGroups.ResizeInstanceGroup Set the size to the fixed size

                                                      func (*AWSCloud) Routes

                                                      func (aws *AWSCloud) Routes() (cloudprovider.Routes, bool)

                                                        Routes returns an implementation of Routes for Amazon Web Services.

                                                        func (*AWSCloud) ScrubDNS

                                                        func (aws *AWSCloud) ScrubDNS(nameservers, searches []string) (nsOut, srchOut []string)

                                                          ScrubDNS filters DNS settings for pods.

                                                          func (*AWSCloud) UpdateLoadBalancer

                                                          func (s *AWSCloud) UpdateLoadBalancer(name, region string, hosts []string) error

                                                            UpdateLoadBalancer implements LoadBalancer.UpdateLoadBalancer

                                                            func (*AWSCloud) Zones

                                                            func (aws *AWSCloud) Zones() (cloudprovider.Zones, bool)

                                                              Zones returns an implementation of Zones for Amazon Web Services.

                                                              type AWSCloudConfig

                                                              type AWSCloudConfig struct {
                                                              	Global struct {
                                                              		// TODO: Is there any use for this?  We can get it from the instance metadata service
                                                              		// Maybe if we're not running on AWS, e.g. bootstrap; for now it is not very useful
                                                              		Zone string
                                                              		KubernetesClusterTag string

                                                              type AWSServices

                                                              type AWSServices interface {
                                                              	Compute(region string) (EC2, error)
                                                              	LoadBalancing(region string) (ELB, error)
                                                              	Autoscaling(region string) (ASG, error)
                                                              	Metadata() (EC2Metadata, error)

                                                                Abstraction over AWS, to allow mocking/other implementations

                                                                type EC2

                                                                type EC2 interface {
                                                                	// Query EC2 for instances matching the filter
                                                                	DescribeInstances(request *ec2.DescribeInstancesInput) ([]*ec2.Instance, error)
                                                                	// Attach a volume to an instance
                                                                	AttachVolume(*ec2.AttachVolumeInput) (*ec2.VolumeAttachment, error)
                                                                	// Detach a volume from an instance it is attached to
                                                                	DetachVolume(request *ec2.DetachVolumeInput) (resp *ec2.VolumeAttachment, err error)
                                                                	// Lists volumes
                                                                	DescribeVolumes(request *ec2.DescribeVolumesInput) ([]*ec2.Volume, error)
                                                                	// Create an EBS volume
                                                                	CreateVolume(request *ec2.CreateVolumeInput) (resp *ec2.Volume, err error)
                                                                	// Delete an EBS volume
                                                                	DeleteVolume(*ec2.DeleteVolumeInput) (*ec2.DeleteVolumeOutput, error)
                                                                	DescribeSecurityGroups(request *ec2.DescribeSecurityGroupsInput) ([]*ec2.SecurityGroup, error)
                                                                	CreateSecurityGroup(*ec2.CreateSecurityGroupInput) (*ec2.CreateSecurityGroupOutput, error)
                                                                	DeleteSecurityGroup(request *ec2.DeleteSecurityGroupInput) (*ec2.DeleteSecurityGroupOutput, error)
                                                                	AuthorizeSecurityGroupIngress(*ec2.AuthorizeSecurityGroupIngressInput) (*ec2.AuthorizeSecurityGroupIngressOutput, error)
                                                                	RevokeSecurityGroupIngress(*ec2.RevokeSecurityGroupIngressInput) (*ec2.RevokeSecurityGroupIngressOutput, error)
                                                                	DescribeSubnets(*ec2.DescribeSubnetsInput) ([]*ec2.Subnet, error)
                                                                	CreateTags(*ec2.CreateTagsInput) (*ec2.CreateTagsOutput, error)
                                                                	DescribeRouteTables(request *ec2.DescribeRouteTablesInput) ([]*ec2.RouteTable, error)
                                                                	CreateRoute(request *ec2.CreateRouteInput) (*ec2.CreateRouteOutput, error)
                                                                	DeleteRoute(request *ec2.DeleteRouteInput) (*ec2.DeleteRouteOutput, error)
                                                                	ModifyInstanceAttribute(request *ec2.ModifyInstanceAttributeInput) (*ec2.ModifyInstanceAttributeOutput, error)

                                                                  TODO: Should we rename this to AWS (EBS & ELB are not technically part of EC2) Abstraction over EC2, to allow mocking/other implementations Note that the DescribeX functions return a list, so callers don't need to deal with paging

                                                                  type EC2Metadata

                                                                  type EC2Metadata interface {
                                                                  	// Query the EC2 metadata service (used to discover instance-id etc)
                                                                  	GetMetadata(path string) (string, error)

                                                                    Abstraction over the AWS metadata service

                                                                    type InstanceGroupInfo

                                                                    type InstanceGroupInfo interface {
                                                                    	// The number of instances currently running under control of this group
                                                                    	CurrentSize() (int, error)

                                                                      InstanceGroupInfo is returned by InstanceGroups.Describe, and exposes information about the group.

                                                                      type InstanceGroups

                                                                      type InstanceGroups interface {
                                                                      	// Set the size to the fixed size
                                                                      	ResizeInstanceGroup(instanceGroupName string, size int) error
                                                                      	// Queries the cloud provider for information about the specified instance group
                                                                      	DescribeInstanceGroup(instanceGroupName string) (InstanceGroupInfo, error)

                                                                        InstanceGroups is an interface for managing cloud-managed instance groups / autoscaling instance groups TODO: Allow other clouds to implement this

                                                                        type VolumeOptions

                                                                        type VolumeOptions struct {
                                                                        	CapacityGB int
                                                                        	Tags       *map[string]string

                                                                        type Volumes

                                                                        type Volumes interface {
                                                                        	// Attach the disk to the specified instance
                                                                        	// instanceName can be empty to mean "the instance on which we are running"
                                                                        	// Returns the device (e.g. /dev/xvdf) where we attached the volume
                                                                        	AttachDisk(instanceName string, volumeName string, readOnly bool) (string, error)
                                                                        	// Detach the disk from the specified instance
                                                                        	// instanceName can be empty to mean "the instance on which we are running"
                                                                        	DetachDisk(instanceName string, volumeName string) error
                                                                        	// Create a volume with the specified options
                                                                        	CreateVolume(volumeOptions *VolumeOptions) (volumeName string, err error)
                                                                        	DeleteVolume(volumeName string) error
                                                                        	// Get labels to apply to volume on creation
                                                                        	GetVolumeLabels(volumeName string) (map[string]string, error)

                                                                          Volumes is an interface for managing cloud-provisioned volumes TODO: Allow other clouds to implement this