[Pacemaker] Re: [Linux-HA] the crm command line interface

[Serge Dubrouski]

Hello -

It's a really great tool. Great job! Here are my expirience
(pacemaker-0.6.5-2.2 + Heartbeat 2.1.3-23.1:

Nodes.

1. Status and Show Node show the exactly the same information. Even
when you provide node name in show command it shows all nodes. Is it
supposed so?

cib.

Couldn't test it because crm_shadow wasn't found. Looks like it's a new tool.

Resource.

1. Status without parameters shows a list of resources but doesn't
show the real status of them onlinr/stopped.

2. It's not clear how to migrate a resource to a specific node it it's
possible at all.

3. It would be good if param resource show was able to show all
parameters for a given resource.

4. Again would be good failcount resource was able to show failcounts
for all nodes

Configure.

ERROR: CIB release '2.1' is not supported
ERROR: bad cib

Will try this part later when I upgrade it to the latest version,
though I think that you shall consider support for old releases as
well.

Options.

1. Help message for skill-level command doesn't say what are possible
options. Entering "skill-level high" crashes the program:

Traceback (most recent call last):
  File "./crm", line 3117, in <module>
    parse_line(levels,shlex.split(inp))
  File "./crm", line 3037, in parse_line
    rv = d() # execute the command
  File "./crm", line 3036, in <lambda>
    d = lambda: cmd[0](*args)
  File "./crm", line 255, in set_skill_level
    if skill_level in skill_levels:
NameError: global name 'skill_levels' is not defined

2. pager/editor/skill-level/user commands without parameters should
show current values.


Thanks for the great job!

Serge.



On Fri, Sep 5, 2008 at 8:59 AM, Dejan Muhamedagic <dejanmm at fastmail.fm> wrote:
> Hi,
>
> Can't read XML? Then this may be something for you...
>
> For some time the command line interface for the CRM/Pacemaker
> has been in the works. About one month ago I posted a draft
> specification and user guide to the development list. There was
> no response, so I assumed that everybody was happy with it ;-)
>
> As I got better grip on how the program could be used, the
> specification changed accordingly during the development.
>
> The first release is already in the Pacemaker's development
> repository. You can get it here:
>
> http://hg.clusterlabs.org/pacemaker/dev/raw-file/tip/tools/crm.in
>
> To run it, first replace @HA_VARLIBDIR@ with /var/lib or wherever
> heartbeat/crm lives. Or compile and install the latest pacemaker
> code. Andrew will probably soon make new rpms.
>
> The source of the current documentation:
>
> http://hg.clusterlabs.org/pacemaker/dev/raw-file/tip/doc/crm_cli.txt
>
> It is readable, but to produce an esthetically more pleasing
> document, just process it with asciidoc to get PDF or HTML.
>
> CLI consists of two main parts: the management (resource
> start/stop, node standby, and similar) and the configuration
> part. There is a (very) small language with which it is possible
> to specify the cluster configuration. This description is then
> translated by the CLI into an XML which the CRM understands.
>
> The management may be used with all versions of heartbeat
> v2/pacemaker, as it is using the external tools such as
> crm_resource.
>
> The configuration part supports only the development version of
> Pacemaker, i.e. it won't work with Pacemaker 0.6.x or Heartbeat
> 2.1.x versions. If there's a too big an outcry, I may consider
> fixing it to support the older releases as well.
>
> To start using it, read the document. If you can't (as most of
> you probably won't), just start the program (type crm) and try to
> manage with help.
>
> Some things are not implemented yet, but should be there soon
> enough:
>
> - tab completion (this seems to me very important, so it is the
>  first on the list)
> - configuring cluster properties (crm_config)
> - the "slow" resource configuration (the "enter" command)
>
> Suggestions are, as always, very welcome. If you have a good idea
> on how to improve the usability, I'm all ears.
>
> Thanks,
>
> Dejan
> _______________________________________________
> Linux-HA mailing list
> Linux-HA at lists.linux-ha.org
> http://lists.linux-ha.org/mailman/listinfo/linux-ha
> See also: http://linux-ha.org/ReportingProblems
>



-- 
Serge Dubrouski.