Re: [Linux-ha-dev] Stonith turns node names to lowercase
On 10/19/2011 04:11 AM, Lars Marowsky-Bree wrote: On 2011-10-18T12:40:40, Florian Haasflor...@hastexo.com wrote: g_strdown(nodecopy); Is there a reason for this ? I suppose Dejan will accept a patch making this configurable. Please, no. We fence by hostname; hostnames are case insensitive by definition. Plugins need to handle that. More specifically - this patch was put in to make this work in the real world. In the real world, host names correspond to DNS names (or you will go crazy). DNS names are case-insensitive - and that's how it is. -- Alan Robertsonal...@unix.sh Openness is the foundation and preservative of friendship... Let me claim from you at all times your undisguised opinions. - William Wilberforce ___ Linux-HA-Dev: Linux-HA-Dev@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev Home Page: http://linux-ha.org/
Re: [Linux-ha-dev] Stonith turns node names to lowercase
Hi, I am currently in the process of writing a fencing agent for VMware vCenter. After some tests, I noticed that the stonith command is turning the nodename to lowercase. But there is already a vcenter stonith plugin (external/vcenter). Argh I should have started there. The problem is that almost every VM in my inventory is uppercase with some mixed case too. VMware allows you to have two VM with the same name but different cases. I cannot find a proper way to deal with this as a case insensitive search through the inventory could yield more than one result. Interesting. Not sure why would one want to have two VM's names differ only in case. I can't really say, but since it is possible, people will do eventually it. Looking through the stonith command source (Mercurial HEAD), I found the following in stonith.c (l. 456) : g_strdown(nodecopy); Is there a reason for this ? Not completely sure, but most probably it was there because some devices ignore case and produce only upper (or lower) case names. The case should be ignored when matching node names. Well, I went around it by using VMware UUIDs, which are known to be unique and persistent, so the problem is solved for me but may arise again later. I'm attaching what I did for reference. If I can find time to do it, I'll try to merge this (UUID support) with the vcenter agent. Thanks to all. -- Albéric de Pertat ADELUX 01 40 86 45 81 vmware-vcenter Description: Perl program ___ Linux-HA-Dev: Linux-HA-Dev@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev Home Page: http://linux-ha.org/
Re: [Linux-ha-dev] Stonith turns node names to lowercase
On 2011-10-18T12:12:05, Alberic de Pertat alberic.deper...@adelux.fr wrote: I am currently in the process of writing a fencing agent for VMware vCenter. After some tests, I noticed that the stonith command is turning the nodename to lowercase. Yes, that was added because host/nodenames by definition *are* case insensitive. DNS, /etc/hosts, etc. If you use VM name == hostname as a convention, even though VM names themselves are case sensitive in VMware, you have effectively adopted a policy that makes them case insensitive. Names that differ just in case thus need to be considered a policy violation; the stonith agent probably should detect and warn about this (perhaps in the monitor?). Regards, Lars -- Architect Storage/HA SUSE LINUX Products GmbH, GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer, HRB 21284 (AG Nürnberg) Experience is the name everyone gives to their mistakes. -- Oscar Wilde ___ Linux-HA-Dev: Linux-HA-Dev@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev Home Page: http://linux-ha.org/
Re: [Linux-ha-dev] Stonith turns node names to lowercase
On 2011-10-18T12:40:40, Florian Haas flor...@hastexo.com wrote: g_strdown(nodecopy); Is there a reason for this ? I suppose Dejan will accept a patch making this configurable. Please, no. We fence by hostname; hostnames are case insensitive by definition. Plugins need to handle that. Regards, Lars -- Architect Storage/HA SUSE LINUX Products GmbH, GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer, HRB 21284 (AG Nürnberg) Experience is the name everyone gives to their mistakes. -- Oscar Wilde ___ Linux-HA-Dev: Linux-HA-Dev@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev Home Page: http://linux-ha.org/
Re: [Linux-ha-dev] Stonith turns node names to lowercase
Hi, On Wed, Oct 19, 2011 at 10:49:57AM +0200, Alberic de Pertat wrote: Hi, I am currently in the process of writing a fencing agent for VMware vCenter. After some tests, I noticed that the stonith command is turning the nodename to lowercase. But there is already a vcenter stonith plugin (external/vcenter). Argh I should have started there. The problem is that almost every VM in my inventory is uppercase with some mixed case too. VMware allows you to have two VM with the same name but different cases. I cannot find a proper way to deal with this as a case insensitive search through the inventory could yield more than one result. Interesting. Not sure why would one want to have two VM's names differ only in case. I can't really say, but since it is possible, people will do eventually it. I'd really be very reluctant to support such setups. It can only cause headache for everybody involved. Thanks, Dejan Looking through the stonith command source (Mercurial HEAD), I found the following in stonith.c (l. 456) : g_strdown(nodecopy); Is there a reason for this ? Not completely sure, but most probably it was there because some devices ignore case and produce only upper (or lower) case names. The case should be ignored when matching node names. Well, I went around it by using VMware UUIDs, which are known to be unique and persistent, so the problem is solved for me but may arise again later. I'm attaching what I did for reference. If I can find time to do it, I'll try to merge this (UUID support) with the vcenter agent. Thanks to all. -- Albéric de Pertat ADELUX 01 40 86 45 81 ___ Linux-HA-Dev: Linux-HA-Dev@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev Home Page: http://linux-ha.org/ ___ Linux-HA-Dev: Linux-HA-Dev@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev Home Page: http://linux-ha.org/
[Linux-ha-dev] Stonith turns node names to lowercase
Hi, I am currently in the process of writing a fencing agent for VMware vCenter. After some tests, I noticed that the stonith command is turning the nodename to lowercase. The problem is that almost every VM in my inventory is uppercase with some mixed case too. VMware allows you to have two VM with the same name but different cases. I cannot find a proper way to deal with this as a case insensitive search through the inventory could yield more than one result. Looking through the stonith command source (Mercurial HEAD), I found the following in stonith.c (l. 456) : g_strdown(nodecopy); Is there a reason for this ? Thanks a lot -- Albéric de Pertat ADELUX 01 40 86 45 81 ___ Linux-HA-Dev: Linux-HA-Dev@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev Home Page: http://linux-ha.org/
Re: [Linux-ha-dev] Stonith turns node names to lowercase
Hi, On Tue, Oct 18, 2011 at 12:12:05PM +0200, Alberic de Pertat wrote: Hi, I am currently in the process of writing a fencing agent for VMware vCenter. After some tests, I noticed that the stonith command is turning the nodename to lowercase. But there is already a vcenter stonith plugin (external/vcenter). The problem is that almost every VM in my inventory is uppercase with some mixed case too. VMware allows you to have two VM with the same name but different cases. I cannot find a proper way to deal with this as a case insensitive search through the inventory could yield more than one result. Interesting. Not sure why would one want to have two VM's names differ only in case. Looking through the stonith command source (Mercurial HEAD), I found the following in stonith.c (l. 456) : g_strdown(nodecopy); Is there a reason for this ? Not completely sure, but most probably it was there because some devices ignore case and produce only upper (or lower) case names. The case should be ignored when matching node names. Thanks, Dejan Thanks a lot -- Albéric de Pertat ADELUX 01 40 86 45 81 ___ Linux-HA-Dev: Linux-HA-Dev@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev Home Page: http://linux-ha.org/ ___ Linux-HA-Dev: Linux-HA-Dev@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev Home Page: http://linux-ha.org/
Re: [Linux-ha-dev] Stonith turns node names to lowercase
On 2011-10-18 12:12, Alberic de Pertat wrote: Hi, I am currently in the process of writing a fencing agent for VMware vCenter. After some tests, I noticed that the stonith command is turning the nodename to lowercase. The problem is that almost every VM in my inventory is uppercase with some mixed case too. VMware allows you to have two VM with the same name but different cases. Gah. That sounds like a great way to go insane, or drive someone else nuts. I really wonder why on earth anyone would want to do this. I cannot find a proper way to deal with this as a case insensitive search through the inventory could yield more than one result. Looking through the stonith command source (Mercurial HEAD), I found the following in stonith.c (l. 456) : g_strdown(nodecopy); Is there a reason for this ? I suppose Dejan will accept a patch making this configurable. Cheers, Florian -- Need help with fencing? http://www.hastexo.com/now ___ Linux-HA-Dev: Linux-HA-Dev@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev Home Page: http://linux-ha.org/
