Can't enable modules (Raspberry Pi OS Stretch ARM64)

I’ve installed it using the latest Raspberry Pi OS for ARM64 on a Raspberry Pi 3 Model B.

It looks like it’s installed and “running”, but as soon as I try to enable any module, it fails to execute the given command.

For example, this is for DNS:

 microk8s enable dns
Traceback (most recent call last):
  File "/snap/microk8s/2217/scripts/wrappers/enable.py", line 43, in <module>
    enable(prog_name='microk8s enable')
  File "/snap/microk8s/2217/usr/lib/python3/dist-packages/click/core.py", line 716, in __call__
    return self.main(*args, **kwargs)
  File "/snap/microk8s/2217/usr/lib/python3/dist-packages/click/core.py", line 696, in main
    rv = self.invoke(ctx)
  File "/snap/microk8s/2217/usr/lib/python3/dist-packages/click/core.py", line 889, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/snap/microk8s/2217/usr/lib/python3/dist-packages/click/core.py", line 534, in invoke
    return callback(*args, **kwargs)
  File "/snap/microk8s/2217/scripts/wrappers/enable.py", line 36, in enable
    enabled_addons, _ = get_status(get_available_addons(get_current_arch()), True)
  File "/snap/microk8s/2217/scripts/wrappers/status.py", line 157, in get_status
    kube_output = kubectl_get("all")
  File "/snap/microk8s/2217/scripts/wrappers/common/utils.py", line 166, in kubectl_get
    return run("kubectl", kubeconfig, "get", cmd, "--all-namespaces", die=False)
  File "/snap/microk8s/2217/scripts/wrappers/common/utils.py", line 39, in run
    result.check_returncode()
  File "/snap/microk8s/2217/usr/lib/python3.5/subprocess.py", line 659, in check_returncode
    self.stderr)
subprocess.CalledProcessError: Command '('kubectl', '--kubeconfig=/var/snap/microk8s/2217/credentials/client.config', 'get', 'all', '--all-namespaces')' returned non-zero exit status 1

It happens the same with Dashboard.

Inspection Report

inspection-report-20210601_230905.tar.gz

Hardware

• Raspberry Pi 3 Model B (with 1 GB of RAM)
• Micro SD of 64 GB, 80% free.

Can someone, please, verify that microk8s is working in a Pi 3 like mine?

Operating System

pi@raspberrypi:~ $ uname -a
Linux raspberrypi 5.10.17-v8+ #1421 SMP PREEMPT Thu May 27 14:01:37 BST 2021 aarch64 GNU/Linux

More info

I have tried with the latest Ubuntu Server for Raspberry Pi and I get the very same issue. I followed the official tutorial here: https://ubuntu.com/tutorials/how-to-kubernetes-cluster-on-raspberry-pi#1-overview

Important

The official tutorial says that the minimum Pis required is 2. I guess this isn’t strictly required, as this should also work with one Pi.

[balchua]

Pi 3B with 1GB ram? Its probably crashing due to OOM. You may get a bit of hope by enabling swap, but thats something kubernetes isn’t recommending.

[sed-i]

I observed a CalledProcessError on a multipass blueprint when tried to enable the dns addon:

Traceback (most recent call last):
  File "/snap/microk8s/3052/scripts/wrappers/enable.py", line 43, in <module>
    enable(prog_name="microk8s enable")
  File "/snap/microk8s/3052/usr/lib/python3/dist-packages/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/snap/microk8s/3052/usr/lib/python3/dist-packages/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/snap/microk8s/3052/usr/lib/python3/dist-packages/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/snap/microk8s/3052/usr/lib/python3/dist-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/snap/microk8s/3052/scripts/wrappers/enable.py", line 36, in enable
    enabled_addons, _ = get_status(get_available_addons(get_current_arch()), True)
  File "/snap/microk8s/3052/scripts/wrappers/status.py", line 158, in get_status
    kube_output = kubectl_get("all,ingress")
  File "/snap/microk8s/3052/scripts/wrappers/common/utils.py", line 169, in kubectl_get
    return run("kubectl", kubeconfig, "get", cmd, "--all-namespaces", die=False)
  File "/snap/microk8s/3052/scripts/wrappers/common/utils.py", line 39, in run
    result.check_returncode()
  File "/snap/microk8s/3052/usr/lib/python3.6/subprocess.py", line 389, in check_returncode
    self.stderr)
subprocess.CalledProcessError: Command '('kubectl', '--kubeconfig=/var/snap/microk8s/3052/credentials/client.config', 'get', 'all,ingress', '--all-namespaces')' returned non-zero exit status 1.
The connection to the server 127.0.0.1:16443 was refused - did you specify the right host or port?

microk8s v1.23.5 on Ubuntu 20.04.4 on multipass (amd64).