59 lines
1.7 KiB
Go
59 lines
1.7 KiB
Go
package chroot
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import (
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"fmt"
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"log"
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"github.com/aws/aws-sdk-go/service/ec2"
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"github.com/mitchellh/multistep"
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"github.com/mitchellh/packer/builder/amazon/common"
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"github.com/mitchellh/packer/packer"
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)
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// StepInstanceInfo verifies that this builder is running on an EC2 instance.
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type StepInstanceInfo struct{}
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func (s *StepInstanceInfo) Run(state multistep.StateBag) multistep.StepAction {
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ec2conn := state.Get("ec2").(*ec2.EC2)
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ui := state.Get("ui").(packer.Ui)
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// Get our own instance ID
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ui.Say("Gathering information about this EC2 instance...")
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instanceIdBytes, err := common.GetInstanceMetaData("instance-id")
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if err != nil {
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log.Printf("Error: %s", err)
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err := fmt.Errorf(
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"Error retrieving the ID of the instance Packer is running on.\n" +
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"Please verify Packer is running on a proper AWS EC2 instance.")
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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instanceId := string(instanceIdBytes)
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log.Printf("Instance ID: %s", instanceId)
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// Query the entire instance metadata
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instancesResp, err := ec2conn.DescribeInstances(&ec2.DescribeInstancesInput{InstanceIDs: []*string{&instanceId}})
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if err != nil {
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err := fmt.Errorf("Error getting instance data: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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if len(instancesResp.Reservations) == 0 {
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err := fmt.Errorf("Error getting instance data: no instance found.")
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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instance := &instancesResp.Reservations[0].Instances[0]
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state.Put("instance", instance)
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return multistep.ActionContinue
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}
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func (s *StepInstanceInfo) Cleanup(multistep.StateBag) {}
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