[ovirt-users] Power Management with python SDK

[Juan Hernández]

On 12/01/2015 03:16 PM, Giulio Casella wrote:
> Hi everybody,
> I'm trying to enable power management on a host using python, but I'm stuck.
> 
> Previously (ovirt 3.5) I directly wrote power management parameters into 
> PowerManagement structure (and everything was working fine), but 
> starting from 3.6 this is not possible.
> 
> This is what I do now:
> 
> agent = params.Agent()
> agent.set_options(params.Options())
> agent.set_type("ilo3")
> agent.set_username("admin")
> agent.set_password("mysecret")
> agent.set_address("172.20.20.1")
> 
> agents=params.Agents()
> agents.add_agent(agent)
> 
> pm=params.PowerManagement()
> pm.set_agents(agents)
> pm.set_enabled(True)
> 
> myhost=api.hosts.get("myhost")
> myhost.set_power_management(pm)
> try:
> 	myhost.update()
> except Exception as e:
> 	print "Error: %s" % e
> 
> and I get:
> 
> Error:
> status: 400
> reason: Bad Request
> detail: Cannot edit Host. Power Management is enabled for Host but no 
> Agent type selected.
> 
> 
> If I dont't enable PM (pm.set_enabled line above) I get no error, but no 
> agent is added.
> 
> My software is:
> - ovirt-engine-3.6.0.3-1.el6
> - ovirt-engine-sdk-python-3.6.0.3-1.el6
> on a CentOS 6.6 distro.
> 
> Any ideas?
> 
> Thanks in advance,
> Giulio

In 3.6 fencing agents have been converted into a sub-collection of the
host entity:

  https://.../ovirt-engine/api/hosts/{host:id}/fenceagents

This means that the recommended way to add/remove/update fencing agents
now in Python is now this:

---8<---
# Find the host:
host = api.hosts.get(name="myhost");

# Enable power management:
host.get_power_management().set_enabled(True)
host.update()

# Add the fencing agent:
agent = params.Agent()
agent.set_options(params.Options())
agent.set_type("ilo3")
agent.set_username("admin")
agent.set_password("mysecret")
agent.set_address("172.20.20.1")
agent.set_order(1);
host.fenceagents.add(agent)
--->8---

You can use this as a workaround. However the mechanism used in 3.5
should continue working in 3.6. If it doesn't it is a bug. The script
that you shared is the one you used in 3.5?

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