lodion

joined 2 years ago
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[–] lodion@aussie.zone 6 points 1 month ago* (last edited 1 month ago) (1 children)

You've reminded me I should donate again, its been a while... though one small correction, O- is not the most common at all. It makes up under ~10% of the population as a rule: https://www.healthdirect.gov.au/blood-types

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submitted 1 month ago* (last edited 1 month ago) by lodion@aussie.zone to c/meta@aussie.zone
 

We've seen some issues with AZ again today. On investigating it looks like more DDOS/abuse traffic from overseas. I've applied the same sort of block as last time we saw this, and things appear to have returned to normal..

The sharp drop is when the "attack" started, the jump is when it was blocked... the red line is blocked requests.

[–] lodion@aussie.zone 4 points 1 month ago

Probably both this and cloudflare caching. Looks like I set CF to cache for 1 year at some point, I can lower it... but that won't "fix" this, only limit the time its an issue for.

[–] lodion@aussie.zone 1 points 1 month ago (1 children)

Yes, and that has put a smile on my face.

[–] lodion@aussie.zone 2 points 2 months ago (1 children)

His term has covered 4 months so far... Jan, Feb, Mar, Apr.

[–] lodion@aussie.zone 4 points 2 months ago

No idea where it's from, but I used it as a kid too. Also munted, though that has fallen out of use for the similar sound to another word.

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Go Private? (aussie.zone)
submitted 2 months ago* (last edited 2 months ago) by lodion@aussie.zone to c/meta@aussie.zone
 

Lemmy 0.19.11 (which I've just upgraded AZ to) has a new feature to allow regular federation, but require users be logged in to view content.

I'd like to gauge feedback from users on this. It will not add privacy, or limit the propagation of posts/comments etc. But it will limit AZ server resource consumption by bots or users that are not logged in.

Thoughts/concerns on enabling this feature?

Update: thank you all for your thoughts and feedback on this. We'll leave AZ as it is, though may use this feature in future if we need to mitigate attacks or other malicious traffic.

[–] lodion@aussie.zone 1 points 3 months ago

You're wrong, I'll leave it at that. Won't be replying any further.

[–] lodion@aussie.zone 2 points 3 months ago (2 children)

With the resources available its not feasible for AZ to develop/deploy custom solutions that can be resolved by remote instances with trivial configuration changes.

I'm not going to address specific parts of your post, suffice to say I disagree on almost everything you said.

As I said previously, if you have a workable solution please do devlop it and submit a PR to the lemmy devs. I'd be happy to try your suggestion should they roll it in.

[–] lodion@aussie.zone 4 points 3 months ago (4 children)

You're contradicting yourself there. By definition adding an external service is a customization to lemmy. I'm not interested in running un-vetted software from a third party.

This has been discussed previously with a request from a reputable source to batching content from LW. That setup required an additional server for AZ, close to LW. And for LW to send their outgoing federation traffic for AZ to it, which then batched and send to the real AZ server. This offer was declined, though appreciated.

I've been transparent and open about the situation. You seem to think this is the fault of AZ, and we're willfully not taking an action that we should be taking. This is not the case.

As it stands the issue is inherent with single threaded lemmy federation, which is why the devs added the option for multiple concurrent threads. Until LW enable this feature, we'll see delayed content from them when their activity volume is greater than what can be federated with a single thread. To imply this is the fault of the receiving instances is disingenuous at best, and deliberately misleading at worst.

[–] lodion@aussie.zone 2 points 3 months ago (6 children)

Note I said lemmy AND the activitypub protocol, ie lemmy does not currently have this capability. If it were added to mainline lemmy I'd be open to configuring it, but its not so I can't.

The root cause of the issue is well understood, the solution is available in lemmy already: multiple concurrent outgoing federation connections to remote instances. AZ has had this configured since it was available. LW have not yet enabled this, though they're now running a version that has it available.

Appreciate the offer, but I'm not interested in customising the AZ server configuration more than it already is. If you write it up and submit a PR that the main lemmy devs incorporate, I'd be happy to look at it.

[–] lodion@aussie.zone 4 points 3 months ago (9 children)

That isn't how lemmy and the activitypub protocol work. Source instance pushes metadata about new content, remote instance then needs to pull it. If we've not received the push yet, we can't pull the additional info.

 

Not entirely clear to me what is going on, but we've seen a large influx in traffic from oversea today. This has lead to high CPU and performance issues.

I've put in place a block to what seems to be the source of the traffic, but its not perfect and may cause other issues. If you see/hear of any please let me know here.

[–] lodion@aussie.zone 3 points 3 months ago (2 children)

It sure doesn't feel like autumn so far

 

I'm about to restart services for this upgrade. Shouldn't be down longer than a few minutes.

[–] lodion@aussie.zone 4 points 7 months ago (1 children)

Not sure about the whole picture, but credit to Keating for bringing in compulsory superannuation.

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submitted 7 months ago* (last edited 7 months ago) by lodion@aussie.zone to c/meta@aussie.zone
 

I'll be working on upgrading aussie.zone to lemmy 0.19.6 today. All going well disruption will be brief, but there may be some performance issues related to back end DB changes required as part of the upgrade.

I'll unpin this once complete.

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submitted 8 months ago* (last edited 7 months ago) by lodion@aussie.zone to c/meta@aussie.zone
 

I've spun this up for fun, to see how it compares to the base lemmy UI. Give it a whirl, and post any feedback in this thread. Enjoy!

It could go down at any time, as it looks as though the dev is no longer maintining it...

edit: using this https://github.com/rystaf/mlmym

UPDATE Tuesday 12/11: I've killed this off for now. Unclear of why, but was seeing a huge number of requests from this frontend to the lemmy server back end. Today it alone sent ~40% more requests than all clients and federation messages combined.

 

Its been 6 months or so... figure its time for another of these. Keep in mind there have been some major config changes in the last week, which has resulted in the oddities below.

Graphs below cover 2 months, except Cloudflare which only goes to 30 days on free accounts.

CPU:

Memory:

Network:

Storage:

Cloudflare caching:

Comments: The server is still happily chugging along. Looking even happier now that I've properly migrated pict-rs to its integrated object storage config, rather than the bodged up setup.

RAM/CPU are all fine. Storage use is growing slowly as various databases grow. Still a long way from needing to purge old posts, if ever.

Cloudflare is saving less traffic these days, since Lemmy added support to proxy all images. Not a concern, well under the bandwidth cap for the server.

As usual feel free to ask any questions.

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Pictures are broken (aussie.zone)
submitted 8 months ago* (last edited 8 months ago) by lodion@aussie.zone to c/meta@aussie.zone
 

I'm in the process of migrating images to a properly configured object storage setup. This involves an offline migration of files. Once complete, I'll start up pict-rs again. Until then, most images will be broken.

All going well this will finish by morning Perth time, and once up and running again may help with the ongoing issues we've had with images.

 

After some users have had issues recently, I've finally gotten around to putting in place a better solution for outbound email from this instance. It now sends out via Amazon SES, rather than directly from our OVH VPS.

The result is emails should actually get to more people now, rather than being blocked by over-enthusiastic spam filters... looking at you Outlook and Gmail.

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REBOOTING (aussie.zone)
 

About to reboot the server, hold onto your hats.

 

Hey all, following the work over the weekend we're now running Lemmy 0.19.4. please post any comments, questions, feedback or issues in this thread.

One of the major features added has been the ability to proxy third party images, which I've enabled. I'll be keeping a closer eye on our server utilisation to see how this goes...

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Maintenance (aussie.zone)
submitted 1 year ago* (last edited 1 year ago) by lodion@aussie.zone to c/meta@aussie.zone
 

This weekend I'll be working to upgrade AZ to lemmy 0.19.4, which requires changes to some other back end supporting systems.

Expect occasional errors/slowdowns, broken images etc.

Once complete, I'll be making further changes to enable/tweak some of the new features.

UPDATE: one of the back end component upgrades requires dumping and reimporting the entire lemmy database. This will require ~1 hour of total downtime for the site. I expect this to kick off tonight ~9pm Perth time.

UPDATE2: DB dump/re-import going to happen ~6pm Perth time, ie about 10 minutes from this edit.

UPDATGE3: we're back after the postgres upgrade. Next will be a brief outage for the lemmy upgrade itself... after I've had dinner 🙂

UPDATE34: We're on lemmy 0.19.4 now. I'll be looking at new features/settings and playing around with them.

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