clickos icon indicating copy to clipboard operation
clickos copied to clipboard

Published 20 hours ago • verified publisher icon sysml

Unable to boot 100 clickos instances

Open stevepp opened this issue 8 years ago • 7 comments

Recently I have been trying to sequentially boot ClickOS. I can not even create 100 clickos instances. Starting the 82nd instance, when I try to used clickos-ctl to install a click configuration I got the error "Domain clickos82 does not seem to be a ClickOS domain".

My host has 16GB RAM and 8-core cpu. So in my experiment I fixed 4GB RAM for Xen Dom0 and pin cpus cores 0-2 to Dom0. For each ClickOS vm, I use "xl" to create the vm and then use clickos-ctl to install the configuration.

Does anyone experience the same problem or have any idea what may have caused it?

stevepp avatar Sep 11 '16 00:09 stevepp

To indentify a domain as a ClickOS guest, clickos-ctl checks for the existence of /local/domain/<id>/data/clickos. This entry is created by a ClickOS domain upon boot.

What might be happening here is that the guests are booting slower after a certain point and the entry is not there yet. Have you tried wainting and then run clickos-ctl again?

If that doesn't work you need to provide more information. Namely the output of xl console <guest_82> and xenstore-ls /local/domain/<id_guest_82>.

fmanco avatar Sep 12 '16 09:09 fmanco

Sorry to reply so late.

Yes, I have tried waiting and then run clickos-ctl again. I checked the output of "xl console guest_82" and could see that the main thread has been created. Then checked the output of "xenstore-ls /local/domain/<id_guest_82>". The entry "/local/domain/82/data/clickos" does have been created.

stevepp avatar Jan 13 '17 17:01 stevepp

So, to clarify: even though /local/domain/82/data/clickos exists at the time you run clickos-ctl, it still fails?

fmanco avatar Jan 20 '17 17:01 fmanco

Yes, correct. But the weird thing is if I change the domain name from like "ClickOS82" to "p82" in the domain configuration file, then this error message is gone. Do you know why this happens?

stevepp avatar Jan 20 '17 17:01 stevepp

Interesting... What is the exact clickos-ctl command you use? Do you use a domain name? Maybe I have a bug in the domain name to domain id conversion code.

fmanco avatar Jan 20 '17 18:01 fmanco

Here is the command I used to install a click configuration:

"clickos install -s clickos82 clickos82.click"

I guess so. There might be some bug in the code that converts domain name to domain ID.

stevepp avatar Jan 20 '17 18:01 stevepp

Can you give the output of strace -s 512 clickos install -s clickos82 clickos82.click?

fmanco avatar Jan 20 '17 18:01 fmanco