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91 lines
3.0 KiB
Go
91 lines
3.0 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package aws
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import (
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"fmt"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/service/autoscaling"
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"github.com/golang/glog"
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)
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// AWSCloud implements InstanceGroups
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var _ InstanceGroups = &Cloud{}
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// ResizeInstanceGroup sets the size of the specificed instancegroup Exported
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// so it can be used by the e2e tests, which don't want to instantiate a full
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// cloudprovider.
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func ResizeInstanceGroup(asg ASG, instanceGroupName string, size int) error {
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request := &autoscaling.UpdateAutoScalingGroupInput{
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AutoScalingGroupName: aws.String(instanceGroupName),
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MinSize: aws.Int64(int64(size)),
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MaxSize: aws.Int64(int64(size)),
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}
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if _, err := asg.UpdateAutoScalingGroup(request); err != nil {
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return fmt.Errorf("error resizing AWS autoscaling group: %v", err)
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}
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return nil
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}
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// Implement InstanceGroups.ResizeInstanceGroup
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// Set the size to the fixed size
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func (c *Cloud) ResizeInstanceGroup(instanceGroupName string, size int) error {
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return ResizeInstanceGroup(c.asg, instanceGroupName, size)
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}
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// DescribeInstanceGroup gets info about the specified instancegroup
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// Exported so it can be used by the e2e tests,
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// which don't want to instantiate a full cloudprovider.
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func DescribeInstanceGroup(asg ASG, instanceGroupName string) (InstanceGroupInfo, error) {
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request := &autoscaling.DescribeAutoScalingGroupsInput{
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AutoScalingGroupNames: []*string{aws.String(instanceGroupName)},
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}
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response, err := asg.DescribeAutoScalingGroups(request)
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if err != nil {
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return nil, fmt.Errorf("error listing AWS autoscaling group (%s): %v", instanceGroupName, err)
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}
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if len(response.AutoScalingGroups) == 0 {
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return nil, nil
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}
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if len(response.AutoScalingGroups) > 1 {
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glog.Warning("AWS returned multiple autoscaling groups with name ", instanceGroupName)
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}
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group := response.AutoScalingGroups[0]
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return &awsInstanceGroup{group: group}, nil
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}
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// Implement InstanceGroups.DescribeInstanceGroup
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// Queries the cloud provider for information about the specified instance group
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func (c *Cloud) DescribeInstanceGroup(instanceGroupName string) (InstanceGroupInfo, error) {
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return DescribeInstanceGroup(c.asg, instanceGroupName)
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}
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// awsInstanceGroup implements InstanceGroupInfo
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var _ InstanceGroupInfo = &awsInstanceGroup{}
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type awsInstanceGroup struct {
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group *autoscaling.Group
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}
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// Implement InstanceGroupInfo.CurrentSize
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// The number of instances currently running under control of this group
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func (g *awsInstanceGroup) CurrentSize() (int, error) {
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return len(g.group.Instances), nil
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}
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