I created a microk8s cluster, pods could be listed by get pod command:
ubuntu@ip-172-31-16-34:~$ microk8s.kubectl get pod --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system coredns-f7867546d-mlsbm 1/1 Running 1 98m
kube-system hostpath-provisioner-65cfd8595b-l2hjz 1/1 Running 1 98m
kube-system tiller-deploy-758bcdc94f-cwbjd 1/1 Running 0 93m
seldon-system seldon-controller-manager-54955d8675-72qxn 1/1 Running 0 33mHowever, I tried to list containers with ctr, nothing showing
ubuntu@ip-172-31-16-34:~$ microk8s.ctr c ls
CONTAINER IMAGE RUNTIME
also try image list
$ microk8s.ctr image list
REF TYPE DIGEST SIZE PLATFORMS LABELSnothing :P maybe I need to find which namespace it used ?
I found the correct namespace for microk8s.ctr from issue https://github.com/ubuntu/microk8s/issues/756
it works after adding -n k8s.io
ubuntu@ip-172-31-16-34:~$ microk8s.ctr -n k8s.io c ls | head
CONTAINER IMAGE RUNTIME
040bd2dcc65ecbd5cd6fc6621ed8059864d0b9f33ac1a5bac129ba3da9d45993 k8s.gcr.io/pause:3.1 io.containerd.runtime.v1.linux
04b368611ede93ad9bcc90c1cca2e0285697a85e51afb7a8acd60e73ee27dc2a k8s.gcr.io/pause:3.1 io.containerd.runtime.v1.linux
050b0a44da4f89b34a4d415c0b584dc6c01fad3ba4ad5676e291113efe889099 k8s.gcr.io/pause:3.1 io.containerd.runtime.v1.linux
0e807caf6967f11eff003fb4dd756b1c9665b3c72297903189b3478fe7b46bc1 k8s.gcr.io/pause:3.1 io.containerd.runtime.v1.linux
144f38f7bd30bdff65a79fd627f52545612cc8669e5851ca4e6d80b99004b546 k8s.gcr.io/pause:3.1 io.containerd.runtime.v1.linux
164bc117c9b128632be3466ce50408be5bf32e68bcc3fd6e062d7f1ec2ab89f6 k8s.gcr.io/pause:3.1 io.containerd.runtime.v1.linux
16fae375f02bc617dd99f102f0230954ec71a4850c3428b86215b05977679a24 k8s.gcr.io/pause:3.1 io.containerd.runtime.v1.linux
18389fce9a2c4bd4fab9a0e2d905592a9df8b73a7bdf1e42a314b7e7e557187e docker.io/jupyterhub/configurable-http-proxy:4.1.0 io.containerd.runtime.v1.linux
1e56ccf5a49df5b3acda2ca0634bc8661da91476c0a611deeb96cd2190b66985 docker.io/metacontroller/jsonnetd:0.1 io.containerd.runtime.v1.linux