# ec2 parallel launch **URL:** \ **Category:** Ansible Project\ **Created:** [February 18, 2015, 11:46am UTC](https://forum.ansible.com/t/ec2-parallel-launch/17548 "2015-02-18T11:46:43Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Alexey\_Wasilyev1](https://avatars.discourse-cdn.com/v4/letter/a/e5b9ba/32.png) [@Alexey\_Wasilyev1](https://forum.ansible.com/u/Alexey_Wasilyev1)\ **Post date:** [February 18, 2015, 11:46am UTC](https://forum.ansible.com/t/ec2-parallel-launch/17548/1 "2015-02-18T11:46:43Z")
Hello! Is there any way to launch multiple different vm’s in parallel? When I set wait=yes to the ec2 module - vm’s are launched one by one, which can be very slow. In case of wait=yes - vm’s are launched rather faster, but I can’t get they ip/hostname for the next steps. Any ideas? ---
**Author:** ![vaida.dan](https://avatars.discourse-cdn.com/v4/letter/v/5daacb/32.png) [@vaida.dan](https://forum.ansible.com/u/vaida.dan)\ **Post date:** [February 21, 2015, 12:11pm UTC](https://forum.ansible.com/t/ec2-parallel-launch/17548/2 "2015-02-21T12:11:31Z")
What do you mean by “slow”? Just use _register_ and in a next task you can get the IP of the launched instances by parsing _instances_ from the registered variable. ---
**Author:** ![Alexey\_Wasilyev1](https://avatars.discourse-cdn.com/v4/letter/a/e5b9ba/32.png) [@Alexey\_Wasilyev1](https://forum.ansible.com/u/Alexey_Wasilyev1)\ **Post date:** [February 21, 2015, 6:21pm UTC](https://forum.ansible.com/t/ec2-parallel-launch/17548/3 "2015-02-21T18:21:38Z")
When I start instances with wait=yes - they start one by one, ~1 instance per minute. I need to launch 10 instances, so it tooks 10 minutes. Can you explain your idea with _register_ with few lines of code\*?\* ---
**Author:** ![vaida.dan](https://avatars.discourse-cdn.com/v4/letter/v/5daacb/32.png) [@vaida.dan](https://forum.ansible.com/u/vaida.dan)\ **Post date:** [February 21, 2015, 7:10pm UTC](https://forum.ansible.com/t/ec2-parallel-launch/17548/4 "2015-02-21T19:10:26Z")
Hmm… There must be something else happening there. I’m launching 5 instances using the count parameter in about 30s. I must say, there are some gotchas while using the cloud modules in regards to the serial parameter but I don’t think that’s the case here. Anyhow, the documentation page of the ec2 module has plenty of code examples: [http://docs.ansible.com/ec2\_module.html](http://docs.ansible.com/ec2_module.html) If that is not enough, take a look at this: [https://github.com/danvaida/ansible-aws-squid3/blob/master/ec2.yml](https://github.com/danvaida/ansible-aws-squid3/blob/master/ec2.yml) Hope this helps. ---
**Author:** ![Alexey\_Wasilyev1](https://avatars.discourse-cdn.com/v4/letter/a/e5b9ba/32.png) [@Alexey\_Wasilyev1](https://forum.ansible.com/u/Alexey_Wasilyev1)\ **Post date:** [February 21, 2015, 8:40pm UTC](https://forum.ansible.com/t/ec2-parallel-launch/17548/5 "2015-02-21T20:40:02Z")
I launch 10 instances using with\_items: ec2: count:1 tags: … with\_items: vms\_array I can’t use count more than 1, because every instance can have different ami, differrent type, different tags. So I need to launch them one by one. Is there any way to get public\_ip / public\_hostame from instance, launched with wait=no? ---
**Author:** ![vaida.dan](https://avatars.discourse-cdn.com/v4/letter/v/5daacb/32.png) [@vaida.dan](https://forum.ansible.com/u/vaida.dan)\ **Post date:** [February 21, 2015, 8:58pm UTC](https://forum.ansible.com/t/ec2-parallel-launch/17548/6 "2015-02-21T20:58:23Z")
Ah, now I see. You should be able to do that if you tag the instances and then use the ec2.py inventory script to get the info you need. I think the in-memory inventory wouldn’t be much of a help in your use case. Dan.