Open Stack

Hello dear Heat Developers,

I am Casper Liu from Alcatel-Lucent. I am doing a project based on Heat(Icehouse), and have questions about Heat SoftwareConfig and SoftwareDevelopment resources.

Your reply would be highly appreciated!
We really anticipate your support and help.

The key point of our project is to execute “heat stack-update” to update a stack with a number of VMs, and this “heat stack-update” will trigger a specified script to be executed on a specified VM instance(this VM already has the specified script) of the stack, and there should be no reboot/rebuild of any VM of the stack. If possible we would like to use SoftwareConfig to do this, for it is modularized and easy to manage, but cfn tool should also be OK.

Take our project as example, we have one stack which has 4 VMs (we can name them as VM1, VM2, VM3 and VM4), there is an need to let Heat template to execute one script(we have coded this Python script.) on VM1 when I execute "heat stack-update -f <my_stack_template_file> -p <my_param_list>" each time.
VM1 can be associated with SoftwareConfig and SoftwareDevelopment resources.
VM1 can NOT be rebooted or rebuilt during execution of "heat stack-update".

My question is:

(1) Could you advise a solution based on Heat for our project scenario?
(2) If a SoftwareDevelopment is set as "UPDATE" in “actions” field of template and associated with VM1 and SoftwareConfig and when "heat stack-update" happens, can the VM1 execute SoftwareConfig without reboot?
(3) If SoftwareConfig can be execute successfully for VM1, then what packages/tools should be installed in VM instance?
Such as hook-script.py ( http://git.openstack.org/cgit/openstack/heat-templates/tree/hot/software-config/elements/heat-config-script/install.d/hook-script.py (http://git.openstack.org/cgit/opensta...) ), is this a must for SoftwareDevelopment?
(4) Is my software version(icehouse) proper to support SoftwareDevelopment and SoftwareConfig?

Below is the version of my Openstack pakages:

root at heatorch:~# pip freeze
... heat==2014.1.dev58.g5896354
python-ceilometerclient==1.0.8
python-cinderclient==1.0.7
python-debian==0.1.21ubuntu1
python-heatclient==0.2.6
python-keystoneclient==0.4.2
python-neutronclient==2.3.3
python-novaclient==2.15.0
python-swiftclient==1.8.0
python-troveclient==1.0.3
...

SoftwareDeployment introduction is as below:
http://docs.openstack.org/developer/heat/template_guide/openstack.html#OS::Heat::Software

Your reply would be highly appreciated!

Thanks a lot!

Regards,
Casper


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