Plan to add disk usage per container?

[tifayuki]

Hi,
I wonder if there is a plan to add disk usage metrics for each container to cAdvisor. And also may include the volume size of each container?

BTW, thanks for this awesome cAdvisor project.

[rjnagal]

disk usage is very specific to the implementation of higher layers (docker
and non-docker use cases). We have been toying with a few ideas and hoping
to come up with something that doesn't need to run inside a user container.
That said, it will probably be much easier to build it for docker first.

We'll definitely do something for disk space soon. If you have any ideas or
a patch, please send it our way :)

On Thu, Aug 28, 2014 at 9:02 AM, tifayuki notifications@github.com wrote:

Hi,
I wonder if there is a plan to add disk usage metrics for each container
to cAdvisor. And also may include the volume size of each container?

BTW, thanks for this awesome cAdvisor project.

—
Reply to this email directly or view it on GitHub
#198.

[tifayuki]

I was thinking that we can do docker ps -s to get the current size of each container. Then look up its image tree to get the size of its each dependent layers. Then the disk usage is the sum of those sizes. But I don't know if we should count the shared layer size or not.

[vishh]

Disk usage metrics are already supported. cAdvisor could possibly expose usage of volumes if they happen to be separate filesystems. Shared volumes will be tricky to handle though.
I'm closing this issue for now.

[discordianfish]

@vishh Are they? At least they aren't available on GKE's k8s. I have container_fs_usage_bytes but without a total or free space metric this isn't useful.

[ivan046]

Disk usage metrics are already supported. cAdvisor could possibly expose usage of volumes if they happen to be separate filesystems. Shared volumes will be tricky to handle though.
I'm closing this issue for now.

I curl the cadvisor of GKE node and get the following:

# HELP container_fs_usage_bytes Number of bytes that are consumed by the container on this filesystem.
# TYPE container_fs_usage_bytes gauge
container_fs_usage_bytes{container="",container_name="",device="/dev/sda1",id="/",image="",name="",namespace="",pod="",pod_name=""} 9.616154624e+09 1592321393409

As you can see, container_name is empty so I can't get space used per container. why?

[DavidPerezIngeniero]

I don't know how to measure the needs of ephemereal space of containers in a k8s cluster.
It would be very useful to have stats by container instead of by node.
I wonder if after eight years, any progress has been made.