Running DC/OS on Small Digital Ocean Droplets

http://penguindreams.org/blog/installing-mesosphere-dcos-on-small-digital-ocean-droplets/

by djsumdog • 10 years ago

53 8 10 years ago

josep2• 10 years ago

Great write up!

I've had similar experience with startup and installation while running on Packet with much more beefy machines. Overall, DCOS is really nice to have but it is not without it's headaches so far.

justinholmes• 10 years ago

I switched off as soon as I saw 'swapon'

Alupis2• 10 years ago

I switched off as soon as I saw 'swapon'

Why? We're discussing running systems with as little at 512MB of RAM, but have 60GB of HDD.

Swap may not be as fast as RAM, but it's sure a heck of a lot better than crashing when your system needs 513MB for an instant...

sgloutnikov• 10 years ago

"Although swap is generally recommended for systems utilizing traditional spinning hard drives, using swap with SSDs can cause issues with hardware degradation over time. Due to this consideration, we do not recommend enabling swap on DigitalOcean or any other provider that utilizes SSD storage. Doing so can impact the reliability of the underlying hardware for you and your neighbors. This guide is provided as reference for users who may have spinning disk systems elsewhere.

If you need to improve the performance of your server on DigitalOcean, we recommend upgrading your Droplet. This will lead to better results in general and will decrease the likelihood of contributing to hardware issues that can affect your service."

eikenberry• 10 years ago

I would argue (and personally prefer) the opposite. The OOM killer reaping your application is easy to diagnose (it's logged) and it is obvious what you need to do to fix it. Random slowdowns due to it hitting swap could be very hard to debug if they cause issues.

tobilg• 10 years ago

IMO, running on so little resources only makes very limited sense. The underlying Mesos Agent service and the other DC/OS services require memory as well, so that very little memory will be left to schedule tasks on.

Having swap space will not help as far as I know, because Mesos will not consider it as "available memory".

tlrobinson• 10 years ago

"I wanted to see what was involved in setting up my own DC/OS instance [...] I wanted to keep this cluster as low cost as possible"

Running DC/OS on Small Digital Ocean Droplets

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