| jtv | Hi bigjools — I have some documentation updates ready for the multiple networks per cluster, but what I'm still missing is a clear designing-your-network document. | 04:08 |
|---|---|---|
| bigjools | jtv: g'day | 04:08 |
| bigjools | jtv: I think some examples would be good but we don't want to be prescriptive do we? | 04:08 |
| bigjools | it's not like serious users will take notice anyway :) | 04:09 |
| jtv | I'm thinking not so much of an if-all-else-fails-rtfm thing, or a "how to unpack your ipod: 1. do not unpack under water or near impending nuclear explosions" | 04:10 |
| jtv | More "the things you'll want to know before you start with this" | 04:11 |
| bigjools | jtv: sounds good | 04:11 |
| jtv | Something that sets the expectations for what you can do with maas, and what you're going to need. | 04:11 |
| jtv | If you think it's useful for me to write up a first stab at such a document, I can put my current branch up for review first. | 04:12 |
| jtv | Ah. Last night I put up a small branch to remove NodeGroup.get_any_interface(), which thank Kibo we no longer needed. Raphaël not only approved it (his review notes being just "Scary!") but landed it before I changed my mind. :-) | 04:14 |
| bradm | has anyone found any useful docs on getting maas to talk ipmi to hp proliant kit? its not obvious to me after a reasonable search, and if someone could shortcut figuring it out, it'd be great :) | 04:22 |
| jtv | I think that's the same ilo as the microservers, right bigjools? | 04:23 |
| bradm | I've mostly got ilo3 and ilo4, the kit is hp proliant dl380 g6/7/8s, or there abouts | 04:24 |
| jtv | Some of us have that — g7 I think. So it shouldn't be hard to get that documented. | 04:24 |
| jtv | With luck it's merely one of those situations where "yay it works" gives people the signal that they're done, and it's just a matter of getting them to write it down. | 04:25 |
| jtv | I do recall that there were some IPMI things it just won't do — such as a serial console. | 04:26 |
| bradm | yeah, thats fine, I think all I care about is the ability to power on / off the servers | 04:26 |
| bradm | the ilos work well for just about everything else | 04:26 |
| jtv | Hmm that ought to be standard fare... | 04:26 |
| bradm | well, they can power on and off the servers too, but I want MaaS to do it for me | 04:26 |
| bradm | its entirely possible there's something wrong with my ipmi setup, too | 04:26 |
| jtv | Yes, and that should work, right? | 04:27 |
| bradm | doesn't seem to | 04:27 |
| bradm | I've been having to manually power cycle things, over the ilo | 04:27 |
| jtv | :/ | 04:27 |
| jtv | Have you tried it from the command line using ipmitool? | 04:27 |
| bradm | I've got 25 nodes in this maas cluster, it'll be more soon | 04:27 |
| jtv | Because the MAAS configuration should be very similar to that. | 04:27 |
| bradm | hm, no, I haven't | 04:27 |
| bradm | I wasn't even sure if that should work without config on the ilo side of things | 04:28 |
| jtv | MAAS needs to know the ilo's address, and IPMI login credentials. | 04:28 |
| bigjools | bradm: how do you have it set up right now? | 04:28 |
| bigjools | is it configured in maas and just doesn't work? | 04:28 |
| bigjools | or something else? | 04:28 |
| bradm | bigjools: in maas I have a power type of ipmi, driver auto detect, with the user and password | 04:29 |
| bigjools | bradm: can you see the power_on task appearing in the celery log? | 04:29 |
| bradm | bigjools: yes | 04:30 |
| bigjools | bradm: and it just fails then? | 04:30 |
| bigjools | as in doesn't turn it on? | 04:30 |
| bradm | bigjools: yeah | 04:30 |
| bigjools | bradm: did you try changing the driver type? | 04:31 |
| bigjools | bradm: you need 2.0 for proliant | 04:32 |
| bigjools | https://bugs.launchpad.net/maas/+bug/1086162 | 04:32 |
| bradm | bigjools: not yet, I had a quick search and really didn't find much to explain how it should be done | 04:32 |
| ubot5 | Ubuntu bug 1086162 in MAAS "IPMI based power management default to IPMI 1.5 based authentication" [High,Triaged] | 04:32 |
| bigjools | bradm: just edit the node | 04:32 |
| bradm | bigjools: yeah, but more as in what the next steps are, I can see how to change the driver :) | 04:32 |
| bradm | bigjools: is there some way to change the default for the maas server? | 04:32 |
| bigjools | well just try that | 04:32 |
| bigjools | not really | 04:33 |
| bigjools | the idea is that when the hardware enlists, its power type is set | 04:33 |
| bigjools | there is no sane default | 04:33 |
| bigjools | did you manually enlist these nodes or do a boot-enlist? | 04:33 |
| bradm | right, I thought there just might be a config setting | 04:33 |
| bradm | so that you could override what the default was | 04:33 |
| bigjools | there used to be a config but I ripped it out :) | 04:33 |
| bradm | it was a boot-enlist | 04:33 |
| bigjools | makes no sense in non-heterogeneous environs | 04:34 |
| bradm | so us heterogeneous folk have to suffer for it? :) | 04:34 |
| bigjools | ok so the bug is that the power type is not detected in the enlistment code | 04:34 |
| bigjools | bradm: does this help https://bugs.launchpad.net/maas/+bug/1086162/comments/6 | 04:35 |
| ubot5 | Ubuntu bug 1086162 in MAAS "IPMI based power management default to IPMI 1.5 based authentication" [High,Triaged] | 04:35 |
| bradm | bigjools: it, uh, could? although I'm not exactly sure why you need something installed on the server if I'm talking ipmi to the ilo | 04:36 |
| bigjools | that's just a quick hack to make it use 2.0 on the cluster controller | 04:37 |
| bradm | oh, so it should be on the maas server? I don't even have that directory | 04:37 |
| bigjools | you can also use maas shell to mass-edit the Node rows in the DB | 04:37 |
| bigjools | bradm: oh ignore me | 04:38 |
| bigjools | we don't use freeipmi any more | 04:38 |
| bradm | whew :) | 04:39 |
| bradm | ok, so I'll try setting the IPMI version to 2.0 for my next install, shouldn't be too long | 04:39 |
| bigjools | bradm: just edit one node to use LAN_2_0 and see if it works | 04:39 |
| bradm | a default setting for the ipmi type would be mighty useful | 04:40 |
| bradm | any time you have to set something manually is an opportunity for error | 04:40 |
| bradm | oh, bah, the only free node I have doesn't have network for whatever reason, but it does have ilo | 04:43 |
| bigjools | bradm: well the point is that the enlistment should work in the first place. Defaults are workarounds. | 04:54 |
| bigjools | jtv: hahaha. The iLO web interface for the N40L has a "use this tagged vlan" setting | 04:54 |
| bradm | bigjools: right, thats true. but bugs do exist in software, and its nice to be able to tweak things to work around them. | 04:55 |
| bigjools | bradm: there's nothing stopping you from tweaking the setting | 04:55 |
| bradm | bigjools: and having to do it to every single server, and then remembering to do it every time I add a new one.. | 04:55 |
| bradm | any sysadmin who's told they have to tweak a setting for every single server will say "Why isn't the default configurable?" | 04:58 |
| * jtv flashes bigjools an angry look | 04:59 | |
| * bigjools bats eyelids at jtv | 04:59 | |
| bigjools | bradm: even if you had a default power type, you still need to set the credentials | 05:00 |
| bigjools | it makes no sense for this at all | 05:00 |
| bradm | bigjools: hmm, I'm not sure I agree - its another thing that whoever sets it up will have to remember to reset - its obvious you have to do IP, username and password, but I could easily see the fact that it needs to be overridden overlooked by someone. | 05:32 |
| bradm | bigjools: but its not a huge deal | 05:32 |
| bigjools | bradm: you have to remember to set the credentials anyway | 05:32 |
| bigjools | if you['re doing it manually | 05:32 |
| bigjools | you're just asking for a workaround for a weird bug here, I'd rather fix the bug! | 05:33 |
| bigjools | if we set defaults for power types then it makes it harder to flag to the user that the power was not configured yet | 05:33 |
| bradm | bigjools: mmm, yeah, I guess. I just find it frustrating when software makes me have to set values on things that could have a default. I'm not sure how often someone would need to change this | 05:36 |
| bigjools | bradm: exactly, it needs setting once, correctly, when enlisting. you're having to set it because of a bug, not because it has no default | 05:37 |
| bradm | bigjools: I have to wait for someone in the UK to wake up and start work before I can really test this, I've got openstack deployed to this maas server right now | 05:39 |
| bigjools | bradm: ok let me know when you can | 05:39 |
| bigjools | bradm: I think roaksoax will be interested in this, I though ipmi detection worked better on proliant | 05:39 |
| bigjools | thought* | 05:40 |
| bradm | bigjools: I wouldn't rule out some kind of misconfiguration here, I don't really know what I'm doing and am randomly clicking buttons. Plus I was handed over an existing setup :) | 05:43 |
| bigjools | bradm: heh ok | 05:43 |
| bradm | this ipmi type stuff isn't really documented anywhere obvious that I've seen | 05:43 |
| bradm | I'd kind of expected at least a mention of it in http://maas.ubuntu.com/docs/nodes.html, maybe | 05:49 |
| bigjools | bradm: ok | 05:57 |
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| melmoth | hola. I have been asked how to tell maas to use a specific preseed file for a given node | 10:17 |
| melmoth | according to https://maas.ubuntu.com/docs/development/preseeds.html#user-provided-preseeds it s possible | 10:17 |
| melmoth | but i dont undertsand how to get a list of valid value for all the "macro" defined {prefix}_{node_architecture}_{node_subarchitecture}_{release}_{node_name} | 10:17 |
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| gmb | rvba, allenap, jtv: If you have a second, https://code.launchpad.net/~gmb/maas/bug-1274871/+merge/204195 is up for review. | 11:09 |
| rvba | gmb: lgtm | 11:21 |
| gmb | Ta | 11:22 |
| allenap | melmoth: I’m looking into that... | 11:32 |
| allenap | melmoth: So, if you look in /etc/maas/preseeds there are several files. To override curtin_userdata for an amd64 node named fred on which you want to run precises, for example, you’d create a file called curtin_userdata_amd64_generic_precise_fred. | 11:39 |
| allenap | melmoth: It’s a bit clumsy, I grant you, but perhaps you could explain what you need to do and I can see if there’s another way to do it? | 11:39 |
| melmoth | allenap, a customer (i m doing support) wants to generate per host preseed file, and i need to tell him how to do that | 11:56 |
| melmoth | so i have been given the url with the user-provider preseed, and i m just wondering what he should put in place of the {settings} to get a preseed that match a given node | 11:57 |
| allenap | melmoth: Okay. Generally, our advice would be: if the machine boots without customising the preseed, wait until it’s up then use, say, Juju or another tool to customise it at that point. | 11:58 |
| melmoth | what he wants is to install stuff on a given disk , so it needs to change that in the preseed | 11:59 |
| allenap | melmoth: Also, the templates are Tempita templates, so you can use any construct that they support, including embedding arbitrary Python. http://pythonpaste.org/tempita/ | 11:59 |
| allenap | melmoth: In other words, you could customise an existing preseed and get it to lookup rules in a separate file according to node name. The node object is passed into the template, so you can use node.name, iirc. | 12:02 |
| gmb | allenap, rvba, jtv: Another wee branch for you to give some love to: https://code.launchpad.net/~gmb/maas/bug-1274912/+merge/204234 | 13:39 |
| jtv | gmb: I'll take it. | 13:40 |
| gmb | Thankee | 13:40 |
| jtv | gmb: kindly COMMENT this kind of magic! In fact I would say this kind of magic is far too vague. Future generations will scratch their heads and be afraid to change the logic. | 13:41 |
| jtv | Can't get_effective_power_type() just return None for "none" or something? | 13:42 |
| gmb | jtv: Sure; I just did the same thing as start_power_nodes does because I was being lazy. | 13:42 |
| jtv | !? | 13:42 |
| gmb | I'll go fix it the *right way* :) | 13:42 |
| gmb | jtv: Seriously, go look :) | 13:43 |
| jtv | Suppressing a wildly generic error from a function somewhere else that might, now or in the future, raise it for unrelated reasons... <shudder> | 13:43 |
| * jtv goes look | 13:43 | |
| jtv | start_power_nodes..? | 13:43 |
| gmb | er | 13:43 |
| jtv | Who is start_power_nodes? | 13:43 |
| gmb | start_nodes() | 13:43 |
| gmb | Sorry. | 13:43 |
| gmb | power mad. | 13:44 |
| jtv | Let's try to keep the golden middle between power mad and power hungry. | 13:44 |
| jtv | Argh. So... repeating the same nonobvious try/except around the same function in multiple places... If only we had a mechanism for writing code just once and then invoking it from multiple places! | 13:45 |
| gmb | jtv: So, I'm guessing this raising of a ValueError (which is, as you say, weirdlybollocks) is to do with this: | 13:46 |
| gmb | 458 # For strings, Django insists on abusing the empty string ("blank") | 13:46 |
| gmb | 459 # to mean "none." | 13:46 |
| gmb | 460 power_type = CharField( | 13:46 |
| gmb | 461 max_length=10, choices=POWER_TYPE_CHOICES, null=False, blank=True, | 13:46 |
| gmb | 462 default='') | 13:46 |
| gmb | So basically you're not allowed to have no power type | 13:46 |
| jtv | Might be, yes. Django hasn't really embraced the null. | 13:47 |
| jtv | IIRC null=False means "do not go to the extreme measure of representing a null value as a null in the database." | 13:47 |
| rvba | Yes, that's what it means. | 13:47 |
| gmb | Yes. | 13:48 |
| jtv | Whereas blank=True means "this field may be left null, but we may store it as an empty string." | 13:48 |
| * jtv giggles insanely | 13:48 | |
| gmb | You're not allowed a power type, unless we actually want to use the power type you don't have, in which case we don't worry about the fact that you don't have one. | 13:48 |
| jtv | So we may have an "if power_type is None" somewhere that should be an "if power_type == ''" | 13:48 |
| gmb | s/not allowed a/not allowed not to have a/ | 13:48 |
| jtv | For a moment you sounded like my government. | 13:49 |
| gmb | jtv: No, I don't think so, but I'll check. | 13:49 |
| gmb | jtv: However, we treat '' as the node saying "I don't know what power type I have" | 13:50 |
| jtv | Ahhhh, get_effective_power_type deliberately raises that ValueError, but documents it as "an error." | 13:52 |
| jtv | One approach that's easy in Python and works well for these situations is to create an ad-hoc exception class, and document the function as raising that. | 13:53 |
| gmb | jtv: Right, I'll do that. Makes sense. | 13:58 |
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| allenap | $Obligatory_rant_about_Django | 14:58 |
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