Support disk usage stats for containerd

[vsxen]

https://github.com/google/cadvisor/blob/master/container/containerd/handler.go#L171-L181

google/cadvisor#2666

container_fs_usage_bytes metrics don't report container fs usage.

root@ubuntu-focal:/home/vagrant# kubectl get --raw="/api/v1/nodes/ubuntu-focal/proxy/metrics/cadvisor" |grep container_fs_usage_bytes
# 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="",device="/dev/sda1",id="/",image="",name="",namespace="",pod=""} 1.012353024e+10 1629159063329
container_fs_usage_bytes{container="",device="/dev/shm",id="/",image="",name="",namespace="",pod=""} 0 1629159063329
container_fs_usage_bytes{container="",device="/run",id="/",image="",name="",namespace="",pod=""} 5.046272e+06 1629159063329
container_fs_usage_bytes{container="",device="/run/containerd/io.containerd.grpc.v1.cri/sandboxes/1d046c4a94b4c9e44c08a2e89d577903dbaa6bddd0c9ee13ada83004345b6479/shm",id="/",image="",name="",namespace="",pod=""} 0 1629159063329
container_fs_usage_bytes{container="",device="/run/containerd/io.containerd.grpc.v1.cri/sandboxes/46f9e546407baf5bdd5acc8f2d360296c645803a51d9c8ce6d5cd42318b66594/shm",id="/",image="",name="",namespace="",pod=""} 0 1629159063329
container_fs_usage_bytes{container="",device="/run/containerd/io.containerd.grpc.v1.cri/sandboxes/835cd29badcb083d666de98d66363f123792f8edcc5b3f78032f322eeeef83cc/shm",id="/",image="",name="",namespace="",pod=""} 0 1629159063329
container_fs_usage_bytes{container="",device="/run/containerd/io.containerd.grpc.v1.cri/sandboxes/c09286ad7a86892d2880f776920dde0891d8dff7e8549b5c85b06f71573c3e30/shm",id="/",image="",name="",namespace="",pod=""} 0 1629159063329
container_fs_usage_bytes{container="",device="/run/lock",id="/",image="",name="",namespace="",pod=""} 0 1629159063329
container_fs_usage_bytes{container="",device="/run/snapd/ns",id="/",image="",name="",namespace="",pod=""} 5.046272e+06 1629159063329
container_fs_usage_bytes{container="",device="/run/user/1000",id="/",image="",name="",namespace="",pod=""} 0 1629159063329
container_fs_usage_bytes{container="",device="/sys/fs/cgroup",id="/",image="",name="",namespace="",pod=""} 0 1629159063329
container_fs_usage_bytes{container="",device="overlay_0-54",id="/",image="",name="",namespace="",pod=""} 1.012353024e+10 1629159063329
container_fs_usage_bytes{container="",device="overlay_0-55",id="/",image="",name="",namespace="",pod=""} 1.012353024e+10 1629159063329
container_fs_usage_bytes{container="",device="overlay_0-56",id="/",image="",name="",namespace="",pod=""} 1.012353024e+10 1629159063329
container_fs_usage_bytes{container="",device="overlay_0-57",id="/",image="",name="",namespace="",pod=""} 1.012353024e+10 1629159063329
container_fs_usage_bytes{container="",device="overlay_0-90",id="/",image="",name="",namespace="",pod=""} 1.012353024e+10 1629159063329
container_fs_usage_bytes{container="",device="overlay_0-91",id="/",image="",name="",namespace="",pod=""} 1.012353024e+10 1629159063329
container_fs_usage_bytes{container="",device="overlay_0-92",id="/",image="",name="",namespace="",pod=""} 1.012353024e+10 1629159063329
container_fs_usage_bytes{container="",device="overlay_0-93",id="/",image="",name="",namespace="",pod=""} 1.012353024e+10 1629159063329
root@ubuntu-focal:/home/vagrant# kubectl get no -owide
NAME           STATUS   ROLES                  AGE   VERSION   INTERNAL-IP   EXTERNAL-IP   OS-IMAGE             KERNEL-VERSION     CONTAINER-RUNTIME
ubuntu-focal   Ready    control-plane,master   17h   v1.21.1   10.0.2.15     <none>        Ubuntu 20.04.2 LTS   5.4.0-80-generic   containerd://1.5.2

[AkihiroSuda]

We already have usage stat API

containerd/api/services/snapshots/v1/snapshots.proto

Line 39 in 024804b

rpc Usage(UsageRequest) returns (UsageResponse);

[vsxen]

can you open a PR to fix this issue?

[fuweid]

@vsxen It is related to cadvisor and there is pr google/cadvisor#2872. Thanks for reporting. Closing.