56 lines
1.1 KiB
Go
56 lines
1.1 KiB
Go
package common
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import (
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"errors"
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"fmt"
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"github.com/mitchellh/goamz/ec2"
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"github.com/mitchellh/multistep"
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"log"
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"time"
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)
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type StateChangeConf struct {
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Conn *ec2.EC2
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Instance *ec2.Instance
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Pending []string
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StepState map[string]interface{}
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Target string
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}
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func WaitForState(conf *StateChangeConf) (i *ec2.Instance, err error) {
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log.Printf("Waiting for instance state to become: %s", conf.Target)
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i = conf.Instance
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for i.State.Name != conf.Target {
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if conf.StepState != nil {
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if _, ok := conf.StepState[multistep.StateCancelled]; ok {
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return nil, errors.New("interrupted")
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}
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}
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found := false
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for _, allowed := range conf.Pending {
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if i.State.Name == allowed {
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found = true
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break
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}
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}
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if !found {
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fmt.Errorf("unexpected state '%s', wanted target '%s'", i.State.Name, conf.Target)
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return
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}
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var resp *ec2.InstancesResp
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resp, err = conf.Conn.Instances([]string{i.InstanceId}, ec2.NewFilter())
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if err != nil {
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return
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}
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i = &resp.Reservations[0].Instances[0]
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time.Sleep(2 * time.Second)
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}
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return
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}
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