func startEC2Instance(ec2Handle *ec2.EC2, options *ec2.RunInstances,
intentHost *host.Host) (*host.Host, *ec2.RunInstancesResp, error) {
// start the instance
resp, err := ec2Handle.RunInstances(options)
if err != nil {
// remove the intent host document
rmErr := intentHost.Remove()
if rmErr != nil {
evergreen.Logger.Errorf(slogger.ERROR, "Could not remove intent host "+
"“%v”: %v", intentHost.Id, rmErr)
}
return nil, nil, evergreen.Logger.Errorf(slogger.ERROR,
"EC2 RunInstances API call returned error: %v", err)
}
evergreen.Logger.Logf(slogger.DEBUG, "Spawned %v instance", len(resp.Instances))
// the instance should have been successfully spawned
instance := resp.Instances[0]
evergreen.Logger.Logf(slogger.DEBUG, "Started %v", instance.InstanceId)
evergreen.Logger.Logf(slogger.DEBUG, "Key name: %v", string(options.KeyName))
// find old intent host
host, err := host.FindOne(host.ById(intentHost.Id))
if host == nil {
return nil, nil, evergreen.Logger.Errorf(slogger.ERROR, "Can't locate "+
"record inserted for intended host “%v”", intentHost.Id)
}
if err != nil {
return nil, nil, evergreen.Logger.Errorf(slogger.ERROR, "Can't locate "+
"record inserted for intended host “%v” due to error: %v",
intentHost.Id, err)
}
// we found the old document now we can insert the new one
host.Id = instance.InstanceId
err = host.Insert()
if err != nil {
return nil, nil, evergreen.Logger.Errorf(slogger.ERROR, "Could not insert "+
"updated host information for “%v” with “%v”: %v", intentHost.Id,
host.Id, err)
}
// remove the intent host document
err = intentHost.Remove()
if err != nil {
return nil, nil, evergreen.Logger.Errorf(slogger.ERROR, "Could not remove "+
"insert host “%v” (replaced by “%v”): %v", intentHost.Id, host.Id,
err)
}
var infoResp *ec2.InstancesResp
instanceInfoRetryCount := 0
instanceInfoMaxRetries := 5
for {
infoResp, err = ec2Handle.Instances([]string{instance.InstanceId}, nil)
if err != nil {
instanceInfoRetryCount++
if instanceInfoRetryCount == instanceInfoMaxRetries {
evergreen.Logger.Errorf(slogger.ERROR, "There was an error querying for the "+
"instance's information and retries are exhausted. The insance may "+
"be up.")
return nil, resp, err
}
evergreen.Logger.Errorf(slogger.DEBUG, "There was an error querying for the "+
"instance's information. Retrying in 30 seconds. Error: %v", err)
time.Sleep(30 * time.Second)
continue
}
break
}
reservations := infoResp.Reservations
if len(reservations) < 1 {
return nil, resp, fmt.Errorf("Reservation was returned as nil, you " +
"may have to check manually")
}
instancesInfo := reservations[0].Instances
if len(instancesInfo) < 1 {
return nil, resp, fmt.Errorf("Reservation appears to have no " +
"associated instances")
}
return host, resp, nil
}