Re: [Fab-user] How to gracefully/elegantly collect data about failed hosts when using fabric.api.execute? (v1)

[Brandon Whaley]

By catching the exception raised when a connection fails.  The connection
doesn't initiate until the first time you call run() or another remote
function.

On Thu, May 17, 2018 at 1:08 PM Abhijeet Rastogi 
wrote:

> Hi Brandon,
>
> Thanks. But how do I handle cases like host connection failures etc? I
> don't have control over returning that information from task function.
>
> Thanks
>
>
> On Thu 17 May, 2018, 20:56 Brandon Whaley,  wrote:
>
>> You need to have your worker function catch any exceptions (
>> https://github.com/fabric/fabric/blob/1.14/fabric/exceptions.py) and
>> evaluate success/failure, then return a value useful to you in determining
>> if your task was successful.  Returning "None" for failure modes is
>> something I've done before.
>>
>> On Thu, May 17, 2018 at 11:15 AM Abhijeet Rastogi <
>> abhijeet.1...@gmail.com> wrote:
>>
>>> Anyone? I was hoping if someone can help me with this.
>>>
>>> On Wed, May 16, 2018 at 9:03 PM Abhijeet Rastogi <
>>> abhijeet.1...@gmail.com> wrote:
>>>
 Hi everyone,

 Let's suppose I have a simple code like this.


 from fabric.api import run, env, execute
 from fabric import state

 env.use_ssh_config = True
 env.parallel = True

 hosts = ['success.host', 'failure.host']

 def get_uptime():
 output = run("uptime")
 return output

 collected_output = execute(get_uptime, hosts=hosts)
 for host, output in collected_output.iteritems():
 if output is not None:
 print("{0}:\n{1}".format(host, output))

 How do I continue my execution of code beyond execute method invocation
 to print successful hosts output and also give a summary of failed hosts?

 I don't want to fabric library to show warnings or exit code when that
 happens. I read about envenv.abort_exception but I'm not sure how to
 use that to do both things, capture output of successful tasks and show
 failed hosts as that exception doesn't have any arguments.

 Any help is appreciated

 --
 Cheers,
 Abhijeet Rastogi (shadyabhi)

>>>
>>>
>>> --
>>> Cheers,
>>> Abhijeet Rastogi (shadyabhi)
>>> ___
>>> Fab-user mailing list
>>> Fab-user@nongnu.org
>>> https://lists.nongnu.org/mailman/listinfo/fab-user
>>>
>>
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Re: [Fab-user] How to gracefully/elegantly collect data about failed hosts when using fabric.api.execute? (v1)

[Abhijeet Rastogi]

Hi Brandon,

Thanks. But how do I handle cases like host connection failures etc? I
don't have control over returning that information from task function.

Thanks


On Thu 17 May, 2018, 20:56 Brandon Whaley,  wrote:

> You need to have your worker function catch any exceptions (
> https://github.com/fabric/fabric/blob/1.14/fabric/exceptions.py) and
> evaluate success/failure, then return a value useful to you in determining
> if your task was successful.  Returning "None" for failure modes is
> something I've done before.
>
> On Thu, May 17, 2018 at 11:15 AM Abhijeet Rastogi 
> wrote:
>
>> Anyone? I was hoping if someone can help me with this.
>>
>> On Wed, May 16, 2018 at 9:03 PM Abhijeet Rastogi 
>> wrote:
>>
>>> Hi everyone,
>>>
>>> Let's suppose I have a simple code like this.
>>>
>>>
>>> from fabric.api import run, env, execute
>>> from fabric import state
>>>
>>> env.use_ssh_config = True
>>> env.parallel = True
>>>
>>> hosts = ['success.host', 'failure.host']
>>>
>>> def get_uptime():
>>> output = run("uptime")
>>> return output
>>>
>>> collected_output = execute(get_uptime, hosts=hosts)
>>> for host, output in collected_output.iteritems():
>>> if output is not None:
>>> print("{0}:\n{1}".format(host, output))
>>>
>>> How do I continue my execution of code beyond execute method invocation
>>> to print successful hosts output and also give a summary of failed hosts?
>>>
>>> I don't want to fabric library to show warnings or exit code when that
>>> happens. I read about envenv.abort_exception but I'm not sure how to
>>> use that to do both things, capture output of successful tasks and show
>>> failed hosts as that exception doesn't have any arguments.
>>>
>>> Any help is appreciated
>>>
>>> --
>>> Cheers,
>>> Abhijeet Rastogi (shadyabhi)
>>>
>>
>>
>> --
>> Cheers,
>> Abhijeet Rastogi (shadyabhi)
>> ___
>> Fab-user mailing list
>> Fab-user@nongnu.org
>> https://lists.nongnu.org/mailman/listinfo/fab-user
>>
>
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Re: [Fab-user] How to gracefully/elegantly collect data about failed hosts when using fabric.api.execute? (v1)

[Brandon Whaley]

You need to have your worker function catch any exceptions (
https://github.com/fabric/fabric/blob/1.14/fabric/exceptions.py) and
evaluate success/failure, then return a value useful to you in determining
if your task was successful.  Returning "None" for failure modes is
something I've done before.

On Thu, May 17, 2018 at 11:15 AM Abhijeet Rastogi 
wrote:

> Anyone? I was hoping if someone can help me with this.
>
> On Wed, May 16, 2018 at 9:03 PM Abhijeet Rastogi 
> wrote:
>
>> Hi everyone,
>>
>> Let's suppose I have a simple code like this.
>>
>>
>> from fabric.api import run, env, execute
>> from fabric import state
>>
>> env.use_ssh_config = True
>> env.parallel = True
>>
>> hosts = ['success.host', 'failure.host']
>>
>> def get_uptime():
>> output = run("uptime")
>> return output
>>
>> collected_output = execute(get_uptime, hosts=hosts)
>> for host, output in collected_output.iteritems():
>> if output is not None:
>> print("{0}:\n{1}".format(host, output))
>>
>> How do I continue my execution of code beyond execute method invocation
>> to print successful hosts output and also give a summary of failed hosts?
>>
>> I don't want to fabric library to show warnings or exit code when that
>> happens. I read about envenv.abort_exception but I'm not sure how to use
>> that to do both things, capture output of successful tasks and show failed
>> hosts as that exception doesn't have any arguments.
>>
>> Any help is appreciated
>>
>> --
>> Cheers,
>> Abhijeet Rastogi (shadyabhi)
>>
>
>
> --
> Cheers,
> Abhijeet Rastogi (shadyabhi)
> ___
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> Fab-user@nongnu.org
> https://lists.nongnu.org/mailman/listinfo/fab-user
>
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Re: [Fab-user] How to gracefully/elegantly collect data about failed hosts when using fabric.api.execute? (v1)

[Abhijeet Rastogi]

Anyone? I was hoping if someone can help me with this.

On Wed, May 16, 2018 at 9:03 PM Abhijeet Rastogi 
wrote:

> Hi everyone,
>
> Let's suppose I have a simple code like this.
>
>
> from fabric.api import run, env, execute
> from fabric import state
>
> env.use_ssh_config = True
> env.parallel = True
>
> hosts = ['success.host', 'failure.host']
>
> def get_uptime():
> output = run("uptime")
> return output
>
> collected_output = execute(get_uptime, hosts=hosts)
> for host, output in collected_output.iteritems():
> if output is not None:
> print("{0}:\n{1}".format(host, output))
>
> How do I continue my execution of code beyond execute method invocation to
> print successful hosts output and also give a summary of failed hosts?
>
> I don't want to fabric library to show warnings or exit code when that
> happens. I read about envenv.abort_exception but I'm not sure how to use
> that to do both things, capture output of successful tasks and show failed
> hosts as that exception doesn't have any arguments.
>
> Any help is appreciated
>
> --
> Cheers,
> Abhijeet Rastogi (shadyabhi)
>


-- 
Cheers,
Abhijeet Rastogi (shadyabhi)
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