Error erofs read only file system

I created an index.js, index.html and package.json file and I wanted to add express. When I write ‘npm install express’ in the terminal, I’m getting the error below. So far, I tried ‘sudo npm install -g express’, deleting node and npm completely and re-install. I also went through other questions over here but none of them worked out for me. Whatever I write with npm I get the same error. (I’m using macOS)

Do you have any suggestions?

This is the error I am getting:

Error: EROFS: read-only file system, mkdir '/npm'

TypeError: Cannot read property 'loaded' of undefined

    at exit (/usr/local/lib/node_modules/npm/lib/utils/error-handler.js:97:27)

    at errorHandler (/usr/local/lib/node_modules/npm/lib/utils/error-handler.js:216:3)

    at /usr/local/lib/node_modules/npm/bin/npm-cli.js:78:20

    at cb (/usr/local/lib/node_modules/npm/lib/npm.js:225:22)

    at /usr/local/lib/node_modules/npm/lib/npm.js:263:24

    at /usr/local/lib/node_modules/npm/lib/config/core.js:81:7

    at Array.forEach (<anonymous>)

    at /usr/local/lib/node_modules/npm/lib/config/core.js:80:13

    at f (/usr/local/lib/node_modules/npm/node_modules/once/once.js:25:25)

    at afterExtras (/usr/local/lib/node_modules/npm/lib/config/core.js:171:20)

/usr/local/lib/node_modules/npm/lib/utils/error-handler.js:97

  var doExit = npm.config.loaded ? npm.config.get('_exit') : true

                          ^

TypeError: Cannot read property 'loaded' of undefined

    at exit (/usr/local/lib/node_modules/npm/lib/utils/error-handler.js:97:27)

    at process.errorHandler (/usr/local/lib/node_modules/npm/lib/utils/error-handler.js:216:3)

    at process.emit (events.js:223:5)

    at process._fatalException (internal/process/execution.js:150:25)

Hi everyone!

I wanted to ask about an error which I have encountered. It has to something with file system being only read — only. I have shared the error below. Anyone kind of help will be highly appreciated.

npm ERR! Linux 3.10.0-514.26.2.el7.ve.x86_64

npm ERR! argv «/usr/bin/node» «/usr/bin/.npm__» «install» «-g» «feo» «—save»

npm ERR! node v6.9.1

npm ERR! npm v3.10.8

npm ERR! path /usr/lib/node_modules

npm ERR! code EROFS

npm ERR! errno -30

npm ERR! syscall access

npm ERR! rofs EROFS: read-only file system, access ‘/usr/lib/node_modules’

npm ERR! rofs This is most likely not a problem with npm itself

npm ERR! rofs and is related to the file system being read-only.

npm ERR! rofs

npm ERR! rofs Often virtualized file systems, or other file systems

npm ERR! rofs that don’t support symlinks, give this error.

npm ERR! Please include the following file with any support request:

npm ERR!   /var/ilx/workspaces/Common/ilxws_Demo/extensions/ilxex_Demo/npm-debug.log

I have a rw file system /myraid0.

# cat /proc/mounts | grep myraid0
/dev/mapper/isw_cfdbejjgdi_myraid0p1 /myraid0 ext4 rw,relatime,stripe=8,data=ordered 0 0

I have no problem writing to /myraid0 as any user.

redis@host:~$ echo hi > /myraid0/tmp/redis/test
redis@host:~$ cat /myraid0/tmp/redis/test
hi

However, my process can’t write a file on /myraid0, due to EROFS (Read-only file system).

open("temp-4036.rdb", O_WRONLY|O_CREAT|O_TRUNC, 0666) = -1 EROFS (Read-only file system)

This shows the process views the mount as ro.

# cat /proc/15920/mounts | grep myraid0
/dev/mapper/isw_cfdbejjgdi_myraid0p1 /myraid0 ext4 ro,relatime,stripe=8,data=ordered 0 0

Why does the process only have read only view of the mount?

Thanks!

Additional details

• Ubuntu 16.04
• Linux jeff-apartment-2015 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:01:55 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
• App is redis-server. It’s failing to save the snapshots to a non-root device
• Redis error is

Failed opening .rdb for saving: Read-only file system

• Installed version 3.0.6 via apt-get
• Launched by systemd
• Listing of /proc/15920/ns (requested by @VenkatC):
lrwxrwxrwx 1 redis redis 0 Sep 16 05:39 cgroup -> cgroup:[4026531835]
lrwxrwxrwx 1 redis redis 0 Sep 15 18:03 ipc -> ipc:[4026531839]
lrwxrwxrwx 1 redis redis 0 Sep 15 18:03 mnt -> mnt:[4026532343]
lrwxrwxrwx 1 redis redis 0 Sep 15 18:03 net -> net:[4026531957]
lrwxrwxrwx 1 redis redis 0 Sep 15 18:03 pid -> pid:[4026531836]
lrwxrwxrwx 1 redis redis 0 Sep 15 18:03 user -> user:[4026531837]
lrwxrwxrwx 1 redis redis 0 Sep 15 18:03 uts -> uts:[4026531838]

• apparmor_status | grep redis returns nothing (requested by @Gilles)
• Nothing else in the logs more informative than the strace output.

Process namespaces

Working bash shell for redis user

ls -l /proc/7359/ns/mnt
lrwxrwxrwx 1 redis redis 0 Sep 15 18:03 /proc/7359/ns/mnt -> mnt:[4026531840]

Not working redis process

ls -l /proc/15920/ns/mnt
lrwxrwxrwx 1 redis redis 0 Sep 15 18:03 /proc/15920/ns/mnt -> mnt:[4026532343]

Working bash shell for my user

ls -atlrh /proc/7138/ns/mnt
lrwxrwxrwx 1 jeff jeff 0 Sep 15 18:03 /proc/7138/ns/mnt -> mnt:[4026531840]