Insufficient permissions inside created Instance to install `npm` packages

[OlegGulevskyy]

Describe the bug
When created instance of Ubuntu 20.x and mount a folder to be shared - cannot install npm packages:

npm WARN tar TAR_ENTRY_ERROR EPERM: operation not permitted, open '/server/node_modules/tiny-lru/package.json'
npm WARN tar TAR_ENTRY_ERROR EPERM: operation not permitted, open '/server/node_modules/through/readme.markdown'
npm WARN tar TAR_ENTRY_ERROR EPERM: operation not permitted, open '/server/node_modules/typescript/LICENSE.txt'
npm WARN tar TAR_ENTRY_ERROR EPERM: operation not permitted, open '/server/node_modules/vscode-typescript-languageservice/out/services/codeAction.js'
npm WARN tar TAR_ENTRY_ERROR EPERM: operation not permitted, open '/server/node_modules/string.prototype.padend/.nycrc

I cannot install the packages on the host and run on Ubuntu because it seems like the installed packages are not compatible with Ubuntu (my host is MacOS), so it needs to install packages itself.

Am I mounting the folder wrongly that leaves the instance with lack of permissions or is there something else that might be missing?

To Reproduce
How, and what happened?

1. multipass mount ./project-folder-on-host instance-name:/name-alias
2. make sure npm and nodejs are installed
3. npm install inside the mounted folder

Expected behavior
Packages to be able to install with sufficient permissions for the created instance to write / read files

Logs
Above

Additional info

• OS: MacOS monterey 12.3.1
• multipass version - 1.8.1
• multipass info --all

Name:           delighted-stoat
State:          Running
IPv4:           192.168.64.4
Release:        Ubuntu 20.04.4 LTS
Image hash:     ccc11e625acd (Ubuntu 20.04 LTS)
Load:           0.00 0.03 0.03
Disk usage:     1.7G out of 4.7G
Memory usage:   163.4M out of 970.0M
Mounts:         /Users/**/Desktop/altv-dayz => /server
                    UID map: 501:default
                    GID map: 20:default

Additional context
Add any other context about the problem here.

[luis4a0]

Hi @OlegGulevskyy, I do not see this as a bug in Multipass. I can mount a folder I own on an instance in MacOS, even under /, and manipulate files on that mount. I suggest you to check npm setup, there is nothing wrong on the Multipass side.

[luis4a0]

On the other hand, do you have write permissions (in the host) on the folder you are mounting?

I can perfectly reproduce your setup (without npm, though) and be able to create files on the mounted folder, on both the instance and the host. What seems strange to me is that the mounted folder contains two stars in the name, how is the instance folder named? In particular, is the user named **?

[OlegGulevskyy]

On the other hand, do you have write permissions (in the host) on the folder you are mounting?

I can perfectly reproduce your setup (without npm, though) and be able to create files on the mounted folder, on both the instance and the host. What seems strange to me is that the mounted folder contains two stars in the name, how is the instance folder named? In particular, is the user named **?

Nope, sorry for the confusion - ** 2 stars was just a placeholder for the user name of the PC, nothing important
The issue is exactly with npm though, I cannot install any packages with given in the initial message logs, as if npm can't read necessary files.
No issues with npm on plain ubuntu or mac (host) systems.

[luis4a0]

Where are you running npm, on the host or the instance? Is the folder empty when you run it?

Can you give us a complete sequence to reproduce the bug?

[OlegGulevskyy]

Where are you running npm, on the host or the instance? Is the folder empty when you run it?

I was running npm on the instance. With both, node_modules present and completely removed - the same result
Running npm on the host does not lead to any issues

Complete sequence is:

1. Have a npm project on your host machine, without node_modules
2. Mount the folder to your ubuntu instance
3. cd to the folder on your ubuntu instance
4. run npm install to install project dependencies

Thank you for looking into it

[luis4a0]

I couldn't reproduce, npm install worked. I suggest you to check the permissions of the folders in the host.

[OlegGulevskyy]

I couldn't reproduce, npm install worked. I suggest you to check the permissions of the folders in the host.

sorry for stupid question - is there anything else I can check apart from chmod ? As the folder has 777 permissions set on host machine right now while having an error

[luis4a0]

That check should suffice.

Did you check removing the mount, restarting the instance and mounting again?

[OlegGulevskyy]

That check should suffice.

Did you check removing the mount, restarting the instance and mounting again?

Just tried:

1. creating new instance
2. making sure to be mounted folder has chmod 777
3. mount the folder
4. enter new instance with shell
5. install nodejs 16.x + npm
6. navigate to the folder and run npm install
   the same result unfortunately

does it matter that the shared folder in virtual instance is on the same level as /tmp /etc and so ? instead of ~

[luis4a0]

That shouldn't be a problem, but you can try in another place. Do you have sufficient disk space? Did you try with another project using npm?

[townsend2010]

Just to echo @luis4a0 here, I'm unable to reproduce either.

Could you also list which npm projects you have installed on your host's project directory and how exactly you installed them?