From mboxrd@z Thu Jan  1 00:00:00 1970
From: George Dunlap <george.dunlap@eu.citrix.com>
Subject: Re: Suggestion for merging xl
	save/restore/migrate/migrate-receive
Date: Mon, 16 Sep 2013 17:40:10 +0100
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To: Ian Jackson <Ian.Jackson@eu.citrix.com>
Cc: Zhigang Wang <zhigang.x.wang@oracle.com>, xen-devel <xen-devel@lists.xen.org>
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On 16/09/13 17:20, Ian Jackson wrote:
> Zhigang Wang writes ("Re: [Xen-devel] Suggestion for merging xl save/restore/migrate/migrate-receive"):
>> ---- xl-migrate.rst ----
> ...
>> * Current xl migrate command is not intuitive, especially the `-s` option::
>>
>>        # xl migrate
>>        Usage: xl [-v] migrate [options] <Domain> <host>
>>        
>>        Save a domain state to restore later.
>>        
>>        Options:
>>        
>>        -h              Print this help.
>>        -C <config>     Send <config> instead of config file from creation.
>>        -s <sshcommand> Use <sshcommand> instead of ssh.  String will be passed
>>                        to sh. If empty, run <host> instead of ssh <host> xl
>>                        migrate-receive [-d -e]
>>        -e              Do not wait in the background (on <host>) for the death
>>                        of the domain.
>>
>>    It's a little hard to adapt other tools as transport.
> Perhaps the documentation needs to be improved.  But you can just say
>     xl migrate -s '' 42 'nc remotehost 1234'

Actually, that's a pretty bizarre interface -- I don't think I would 
have gotten that from the help.

If we had a new "transport" option that could take format strings, we 
could even set the default transport in xl.conf, like so:

migrate.default.transport="myssh %h %r"

migrate.default.transport="nc %h 1234"

migrate.default.transport="socat - OPENSSL:%h:8005,verify=0"

(Where %h would be the remote host, and %r the remote command to execute 
-- i.e., xl recieve.)

Or of course:

xl migrate -t "nc %h 1234" 42 remotehost

Zhigang, would that work better for you guys?

  -George