How to remotely reboot a Linux host if SSH fails to connect? (lemmy.nz)

submitted 2 years ago* (last edited 2 years ago) by sylverstream@lemmy.nz to c/selfhosted@lemmy.world

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Edit2: Thanks all for your responses! I have checked the logs, https://lemmy.nz/comment/6192604, and based on that removed tracker-miner-fs as it's a search/index tool which I don't need. No idea why it took over all memory. I'll also get a WiFi Smartplug as a kill switch. Hopefully that solves it. Thanks again heaps!

I've got a HP ProDesk G3 which I'm using as home server, I've installed Ubuntu on it. Earlier this week the services I host on it stopped (Immich & Frigate). I tried to SSH, but it just hung after asking for a password. I could ping it, but it was just unresponsive.

I had to force reboot it manually. This is fine, but I'm not always at home.

The chip has Intel vPro as far as I know, which could be an option, but I have no idea how this works. The documentation on the Intel site seems focused on enterprises. I tried to connect with RealVNC which does not work, so I think I've got to install/configure something on the server first.

I also asked Bing Chat but it came up with non existing packages & commands. Welcome your thoughts!

/edit: I just found this, which seems to be exactly what I need: https://manpages.ubuntu.com/manpages/focal/en/man7/amt-howto.7.html

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[-] sylverstream@lemmy.nz 1 points 2 years ago* (last edited 2 years ago)

Yes, thanks for that. Good point. I checked the logs, and minutes before it crashed I can see below in the logs. Seems like either a GPU error or out of memory error. I've deleted tracker-miner-fs as I don't need it. It also shows a massive list of processes with their memory usage.

Feb 21 17:27:49 hppd600-g3 kernel: i915 0000:00:02.0: [drm] GPU HANG: ecode 9:0:00000000
Feb 21 17:32:43 hppd600-g3 kernel: 1305621 total pagecache pages
Feb 21 17:32:43 hppd600-g3 kernel: 16258 pages in swap cache
Feb 21 17:32:43 hppd600-g3 kernel: Free swap  = 0kB
Feb 21 17:32:43 hppd600-g3 kernel: Total swap = 1000444kB
Feb 21 17:32:43 hppd600-g3 kernel: 2065206 pages RAM
Feb 21 17:32:43 hppd600-g3 kernel: 0 pages HighMem/MovableOnly
Feb 21 17:32:43 hppd600-g3 kernel: 64196 pages reserved
Feb 21 17:32:43 hppd600-g3 kernel: 0 pages hwpoisoned

Feb 21 17:32:43 hppd600-g3 kernel: oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=user.slice,mems_allowed=0,global_oom,task_memcg=/user.slice/user-113.slice/user@113.service/background.slice/tracker-miner-fs-3.service,task=t>
Feb 21 17:32:43 hppd600-g3 kernel: Out of memory: Killed process 833 (tracker-miner-f) total-vm:625676kB, anon-rss:3144kB, file-rss:4816kB, shmem-rss:4kB, UID:113 pgtables:280kB oom_score_adj:200
Feb 21 17:32:43 hppd600-g3 kernel: i915 0000:00:02.0: [drm] Resetting rcs0 for stopped heartbeat on rcs0

this post was submitted on 22 Feb 2024

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