Docker wptagent cpu throttle ?

WebPageTest Private Instances
1

First time docker wpt user and I have managed to get wpt server and wptagent installed and running but 3g emulated moto gen4 isn’t throtling the cpu ? I don’t think ?

Is this the correct way to enable cpu throttling for wptagent ?

docker run -d -p 4001:80 \
    --network="host" \
    --name wptagent \
    -e "SERVER_URL=http://localhost:4000/work/" \
    -e "LOCATION=Test" \
    -e "EXTRA_ARGS='--throttle'" \
    --cap-add="NET_ADMIN" \
    --shm-size=1g \
    webpagetest/agent
2

I encountered exactly the same problem as you recently while trying to set up my private instance. I managed to solve it and my private instance has been running now for a few weeks with CPU throttling, so I’ve just created an issue in the repo to see if we can fix it for everyone: Enabling CPU throttling causes Docker container to fail · Issue #354 · WPO-Foundation/wptagent · GitHub

You can see the whole details in the issue, but to summarise:
[list]
[]The docker image is missing the cgroup-tools package, this will need to be added to the image
[]The cgroup filesystem inside /sys is read-only but the cgroup tools expect it to be writeable in order to create and manage the cgroups.
[/list]

I don’t know if the fix is safe to use (from a security point of view) as I’m not familiar with Docker, but you may want to try it fix and see if it helps you.

3

cheers thanks for sharing the workaround :slight_smile: