launch failed: Cannot open image file for computing hash

[konnta0]

Summary

When I executed 'microk8s install --mem=24 --cpu=7' got 'launch failed microk8s' message

What Should Happen Instead?

Installation succeeds with microk8s install command.

Reproduction Steps

1. execute "microk8s install --mem=24 --cpu=7"
   The output at runtime is as follows.

microk8s install --mem=20 --cpu=7

Warning: the "--mem" long option is deprecated in favour of "--memory". Please update any scripts, etc.
Retrieving image: 4%
launch failed: Cannot open image file for computing hash
Warning: the "--mem" long option is deprecated in favour of "--memory". Please update any scripts, etc.
launch failed: Downloaded image hash does not match
Warning: the "--mem" long option is deprecated in favour of "--memory". Please update any scripts, etc.
launch failed: Downloaded image hash does not match
Warning: the "--mem" long option is deprecated in favour of "--memory". Please update any scripts, etc.
launch failed: Downloaded image hash does not match
Warning: the "--mem" long option is deprecated in favour of "--memory". Please update any scripts, etc.
launch failed: Downloaded image hash does not match
Warning: the "--mem" long option is deprecated in favour of "--memory". Please update any scripts, etc.
launch failed: Downloaded image hash does not match
Warning: the "--mem" long option is deprecated in favour of "--memory". Please update any scripts, etc.
launch failed: Downloaded image hash does not match
Warning: the "--mem" long option is deprecated in favour of "--memory". Please update any scripts, etc.
launch failed: Downloaded image hash does not match
Warning: the "--mem" long option is deprecated in favour of "--memory". Please update any scripts, etc.
launch failed: Downloaded image hash does not match
Warning: the "--mem" long option is deprecated in favour of "--memory". Please update any scripts, etc.
launch failed: Downloaded image hash does not match
Warning: the "--mem" long option is deprecated in favour of "--memory". Please update any scripts, etc.
launch failed: Downloaded image hash does not match
An error occurred with the instance when trying to launch with 'multipass': returned exit code 2.
Ensure that 'multipass' is setup correctly and try again.

multipass list
No instances found.

Introspection Report

microk8s inspect
MicroK8s is not installed. Please run `microk8s install`.

Can you suggest a fix?

Retrieving image seemed to be very slow.
Launch failed is displayed in about 4% of cases.
Is there a list somewhere of where to get the images?
I'm thinking of trying if I can change it.

[neoaggelos]

Hi @konnta0

The microk8s installer uses multipass underneath to spawn a VM. It looks like the error is coming from multipass failing to download the VM image.

Can you try to manually start a multipass VM with multipass launch 20.04? I also wonder if the error you are seeing was transient networking issues.

[konnta0]

@neoaggelos
Thank you for your reply!!
When I tried again, it succeeded in acquiring the image but failed to start...

multipass launch 20.04 -n test
Launched: test

multipass list
Name                    State             IPv4             Image
test                    Running           192.168.108.6    Ubuntu 20.04 LTS

microk8s install --mem=20 --cpu=7
Warning: the "--mem" long option is deprecated in favour of "--memory". Please update any scripts, etc.
Launched: microk8s-vm
ping: snapcraft.io: Temporary failure in name resolution
An error occurred when trying to execute 'sudo ping -c 1 snapcraft.io' with 'multipass': returned exit code 2.

multipass list
Name                    State             IPv4             Image
microk8s-vm             Running           192.168.108.7    Ubuntu 22.04 LTS
test                    Running           192.168.108.6    Ubuntu 20.04 LTS