| BraveheartBSD | An older server was depleting entropy, I had to run haveged on it, a newer server doesn't have a problem, just wondering if the entropy seed was implemented on hardware or software. | 00:04 |
|---|---|---|
| sdeziel | BraveheartBSD: some modern CPUs have instruction that gives fast random. Modern kernels make use of that (when available), among other sources of entropy | 00:16 |
| BraveheartBSD | sdeziel, thanks. I'm using an old Dell T610 as a backup, it's now working fine. | 00:20 |
| rbasak | BraveheartBSD: FWIW, use of haveged is questionable. See: https://lwn.net/Articles/525459/ | 00:29 |
| sdeziel | from what I could find, this T610 uses an old CPU (Nehalem) which AFAICT, doesn't have the RDRAND instruction that more modern CPUs have | 00:29 |
| rbasak | Software based entropy is impossible. You have to have hardware involved somehow. | 00:30 |
| sdeziel | https://systemd.io/RANDOM_SEEDS/ is also an interesting quick read | 00:30 |
| rbasak | sdeziel: o/ while you're here, did you report a failure with ubuntu-advantage-tools and a FetchFailedException somewhere? IIRC you did, but I can't find it any more. | 00:31 |
| sdeziel | rbasak: no, I haven't got to reporting it yet, sorry | 00:32 |
| sdeziel | rbasak: doing now | 00:34 |
| rbasak | Thanks! | 00:36 |
| sdeziel | https://bugs.launchpad.net/ubuntu/+source/ubuntu-advantage-tools/+bug/2004130 | 00:43 |
| -ubottu:#ubuntu-server- Launchpad bug 2004130 in ubuntu-advantage-tools (Ubuntu) "esm-cache.service throw apt.cache.FetchFailedException when connecting to https://esm.ubuntu.com fails" [Undecided, New] | 00:43 | |
| BraveheartBSD | rbasak, sdeziel That doesnt help, lol. The previous OS on the Dell ran fine, no entropy related errors at all. I had to change due to ZFS incompatabilty with the PERC 700. Ubuntu 22.04.1 first bought up the error, or rather, the monitoring app did. | 00:44 |
| BraveheartBSD | I'll keep looking into it | 00:45 |
| JanC | something might be using more random numbers... | 00:48 |
| rbasak | sdeziel: thanks! | 00:48 |
| rbasak | BraveheartBSD: what's the error? That your monitoring app complains? Or is there something that's actually stalling or not working? | 00:49 |
| BraveheartBSD | Netdata complains the entropy is depleted, and recommends running haveged, so quite possibly, netdata itself is depleteing the entropy pool. | 00:52 |
| BraveheartBSD | The error has no affect on the server operation. | 00:53 |
| sdeziel | BraveheartBSD: I think Netdata is slightly wrong/misleading here, see https://github.com/netdata/netdata/issues/2510 | 01:02 |
| -ubottu:#ubuntu-server- Issue 2510 in netdata/netdata "Warning about low entropy isn't completely correct" [Closed] | 01:02 | |
| sdeziel | AFAIK, on 22.04 kernels, no random providing interface is blocking anymore (except a brief time window during bootup where /dev/random can block, IIRC) | 01:04 |
| sdeziel | that's not always been true though as /dev/random was known to block when entropy would "run low". That would then cause various issues with services needing entropy like Apache being unable to handle HTTPS connections for example. | 01:06 |
| rbasak | I'm curious to know whether the report of depleted entropy is resulting from just after boot, or if it's low on an ongoing basis. | 01:12 |
| sdeziel | https://lwn.net/Articles/884875/ is probably what I'm quoting/remembering (badly) | 01:12 |
| BraveheartBSD | It runs for a while, netdata displays a graph that shows entropy counting down, then posts the error. I used something different on FreeBSD 13. I'll disable netdata on this server and see what transpires. | 01:17 |
| BraveheartBSD | It's starting to look like Netdata is the problem | 01:18 |
| JanC | sounds like it might be panicking too early | 01:54 |
| === chris14_ is now known as chris14 | ||
| habys | rbasak: I don't see how it's relevant. If subiquity can install one machine why not use it to install more than one machine? | 03:52 |
| habys | I don't need subiquity to manage any machines, I use puppet for that. I am just trying to get subiquity to update the target OS and it's crashing without any error message that I can find. | 04:26 |
| === PeGaSuS is now known as Guest9064 | ||
| === bbezak0 is now known as bbezak | ||
| === elastic_dog is now known as Guest5516 | ||
| rbasak | habys: because you said: | 11:48 |
| rbasak | > I'm guessing in general people (in here|anywhere) aren't managing a fleet of physical machines imaged with ubuntu | 11:48 |
| rbasak | They are, but they use our dedicated solution for that. | 11:49 |
| rbasak | If you don't want to use the solution that everybody else uses, then you're welcome to do that but you're more likely to run into issues. | 11:49 |
| rbasak | But please do submit bug reports! | 11:49 |
| habys | thank you, I really want to get this pxe boot working | 12:49 |
| habys | I fixed it! It doesn't make sense but it works! | 13:20 |
| habys | after failing to run `apt upgrade` or equivalent in `user-data` via `late-commands:\ncurtin in-target --target=/target apt -y upgrade` and not being able to find any reason that it's not working | 13:22 |
| habys | I wrote a script to target with printf, chmodded and ran in with curtin and it worked | 13:23 |
| habys | I don't understand the crash logs in /var/crash/*.crash, they are absolutely gigantic, and don't even contain the output from the command that causes a crash | 13:24 |
| lotuspsychj3 | !bug | habys explains filing crash bugs too | 13:57 |
| ubottu | habys explains filing crash bugs too: If you find a bug in Ubuntu or any of its official !flavors, please report it using the command « ubuntu-bug <package> » - See https://help.ubuntu.com/community/ReportingBugs for other ways to report bugs. | 13:57 |
| === Liver-K is now known as Liver_K | ||
| habys | lotuspsychj3: yes, I will file a bug, thanks | 15:59 |
| athos | Hi! Could someone ack LP: #2004107 so I can sync nut? I am just dropping a delta that I added a few weeks ago there that got merged in Debian :) | 16:12 |
| -ubottu:#ubuntu-server- Launchpad bug 2004107 in nut (Ubuntu) "Sync nut 2.8.0-7 from Debian unstable" [Undecided, Triaged] https://launchpad.net/bugs/2004107 | 16:12 | |
| Odd_Bloke | Hmm, I must have missed some renewal emails for LP groups at some point, I'm no longer an Ubuntu member/developer. How can I go about getting those restored? | 17:01 |
| ogra | community council should be able to re-activate you | 17:02 |
| rbasak | No, it's the DMB | 17:16 |
| rbasak | Odd_Bloke: email devel-permissions@ please | 17:16 |
| rbasak | Also see: https://wiki.ubuntu.com/DeveloperMembershipBoard/KnowledgeBase#Accidental_Expiry | 17:17 |
| Odd_Bloke | rbasak: Ack, thank you! | 18:55 |
| tetrakist | Two questions. Are servers more or less efficient than space heaters at heating a room? Second, if I was given a machine with 512GB of RAM, what could I use it for? | 19:40 |
| arraybolt3 | tetrakist: Probably not as efficient of a space heater, and with that much RAM, I'd turn it into a virtualization server. | 19:40 |
| bryceh | @athos taking a look | 19:41 |
| tetrakist | arraybolt3, why wouldn't it be as efficient? where is the electricity going, if not into heat? | 19:41 |
| arraybolt3 | tetrakist: Processing power, I believe. This probably isn't on-topic for this room though, since this room is for support of the Ubuntu Server operating system, and not for info about server hardware. | 19:42 |
| tetrakist | arraybolt3, Also, I don't have anything to virtualize. Is there some place for virtualization projects? | 19:42 |
| tetrakist | *virtualization project ideas | 19:42 |
| tetrakist | arraybolt3, yeah, I'll drop the heater topic, then. | 19:42 |
| bryceh | @athos looks good! yes ack on sync | 19:44 |
| xibalba | is there a tool on the cli i could use to highlight multiple different strings of text on the cli ? | 19:49 |
| xibalba | i know less can do it for 1 string, but i have 3 different strings i'd like to highlight | 19:49 |
| xibalba | as a workaround i could do tmux, split the screen into 3 windows and 1 highlight per window | 19:50 |
| sdeziel | xibalba: with less, you can search for a regex like "/(foo|bar)" and all occurrences of `foo` and `bar` would be highlighted | 19:51 |
| xibalba | brilliant | 19:51 |
| ravage | echo "pattern1 pattern2 pattern3 pattern4" | grep --color -E '^|pattern1|pattern2' | 19:51 |
| xibalba | i need to see some lines above/below the strings | 19:51 |
| xibalba | but i dont know how many linea above/below, so -A -B options in grep wont work | 19:52 |
| sdeziel | xibalba: with grep, you can show the surrounding 3 lines with `grep -3` | 19:52 |
| sdeziel | ah, sorry replied too quickly | 19:52 |
| xibalba | no worries the less option just worked perfect, thank you sdeziel | 19:52 |
| xibalba | thank you too ravage | 19:52 |
| sdeziel | cool | 19:52 |
| athos | thanks, bryceh :) | 20:36 |
| athos | sync'd | 20:39 |
| === nihe_ is now known as nihe | ||
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