apcupsd help "Read-only file system error"

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fals3illusion

New Member
Oct 16, 2023
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I just upgraded my proxmox ve server to new hardware and I am having trouble getting my APC UPS's working on a debian lxc with apcupsd.

This is the main resource I followed along with a lot other research to finally get it working on the old system. Everything was working before I moved to a new pve server.
https://wiki.debian.org/apcupsd#Installation

in my lxc config I am passing through
lxc.mount.entry: /dev/usb dev/usb none bind,optional,create=dir

I have 6 UPS's that are all on 1 hub connected to one of my USB ports on the back of my pve server..
I have a rules file
nano /etc/udev/rules.d/ups.rules


Code: 
# Back-UPS RS Middle 1500MS Shelf -- middleShelf
KERNEL=="hiddev*", ATTRS{manufacturer}=="American Power Conversion", ATTRS{serial}=="SerialXXX", OWNER="root", SYMLINK+="usb/ups-middleShelf"

# Smart-UPS Right 1000 Shelf -- rightShelf
KERNEL=="hiddev*", ATTRS{manufacturer}=="American Power Conversion", ATTRS{serial}=="SerialXXX", OWNER="root", SYMLINK+="usb/ups-rightShelf"

# Smart-UPS Left 1500 Shelf -- leftShelf
KERNEL=="hiddev*", ATTRS{manufacturer}=="American Power Conversion", ATTRS{serial}=="SerialXXX", OWNER="root", SYMLINK+="usb/ups-leftShelf"

# Smart-UPS Top SRT Rack -- topSRTrack
KERNEL=="hiddev*", ATTRS{manufacturer}=="American Power Conversion", ATTRS{serial}=="SerialXXX", OWNER="root", SYMLINK+="usb/ups-topSRTrack"

# Smart-UPS Middle SRT Rack -- middleSRTrack
KERNEL=="hiddev*", ATTRS{manufacturer}=="American Power Conversion", ATTRS{serial}=="SerialXXX", OWNER="root", SYMLINK+="usb/ups-middleSRTrack"

# Smart-UPS Bottom SRT Rack -- bottomSRTrack
KERNEL=="hiddev*", ATTRS{manufacturer}=="American Power Conversion", ATTRS{serial}=="SerialXXX", OWNER="root", SYMLINK+="usb/ups-bottomSRTrack"


then using this command udevadm trigger --verbose --sysname-match=hiddev*
I am trying to map /SYMLINK the ups's and I am getting this error.

/sys/devices/pci0000:00/0000:00:14.0/usb1/1-11/1-11.3/1-11.3.1/1-11.3.1.1/1-11.3.1.1:1.0/usbmisc/hiddev3
hiddev3: Failed to write 'change' to '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-11/1-11.3/1-11.3.1/1-11.3.1.1/1-11.3.1.1:1.0/usbmisc/hiddev3/uevent': Read-only file system

I have tried to change permissions but not working with.

chown 100000:100000 /dev/usb

root@apc-node-red:/dev/usb# ls
hiddev0 hiddev1 hiddev2 hiddev3 hiddev4 hiddev5 hiddev6
root@apc-node-red:/dev/usb# chown 100000:100000 /dev/usb
root@apc-node-red:/dev/usb# ls -l /dev/usb
total 0
crw------- 1 root root 180, 0 Jun 17 16:25 hiddev0
crw------- 1 root root 180, 1 Jun 17 16:25 hiddev1
crw------- 1 root root 180, 2 Jun 17 16:25 hiddev2
crw------- 1 root root 180, 3 Jun 17 16:25 hiddev3
crw------- 1 root root 180, 4 Jun 17 16:25 hiddev4
crw------- 1 root root 180, 5 Jun 17 16:25 hiddev5
crw------- 1 root root 180, 6 Jun 17 16:25 hiddev6
root@apc-node-red:/dev/usb#

Any idea how I can try and fix this?

Thanks!
 
Last edited:
fals3illusion said:
I just upgraded my proxmox ve server to new hardware and I am having trouble getting my APC UPS's working on a debian lxc with apcupsd.

This is the main resource I followed along with a lot other research to finally get it working on the old system. Everything was working before I moved to a new pve server.
https://wiki.debian.org/apcupsd#Installation

in my lxc config I am passing through
lxc.mount.entry: /dev/usb dev/usb none bind,optional,create=dir

I have 6 UPS's that are all on 1 hub connected to one of my USB ports on the back of my pve server..
I have a rules file
nano /etc/udev/rules.d/ups.rules


Code: 
# Back-UPS RS Middle 1500MS Shelf -- middleShelf
KERNEL=="hiddev*", ATTRS{manufacturer}=="American Power Conversion", ATTRS{serial}=="SerialXXX", OWNER="root", GROUP="100000", MODE="0666", SYMLINK+="usb/ups-middleShelf"

# Smart-UPS Right 1000 Shelf -- rightShelf
KERNEL=="hiddev*", ATTRS{manufacturer}=="American Power Conversion", ATTRS{serial}=="SerialXXX", OWNER="root", GROUP="100000", MODE="0666", SYMLINK+="usb/ups-rightShelf"

# Smart-UPS Left 1500 Shelf -- leftShelf
KERNEL=="hiddev*", ATTRS{manufacturer}=="American Power Conversion", ATTRS{serial}=="SerialXXX", OWNER="root", GROUP="100000", MODE="0666", SYMLINK+="usb/ups-leftShelf"

# Smart-UPS Top SRT Rack -- topSRTrack
KERNEL=="hiddev*", ATTRS{manufacturer}=="American Power Conversion", ATTRS{serial}=="SerialXXX", OWNER="root", GROUP="100000", MODE="0666", SYMLINK+="usb/ups-topSRTrack"

# Smart-UPS Middle SRT Rack -- middleSRTrack
KERNEL=="hiddev*", ATTRS{manufacturer}=="American Power Conversion", ATTRS{serial}=="SerialXXX", OWNER="root", GROUP="100000", MODE="0666", SYMLINK+="usb/ups-middleSRTrack"

# Smart-UPS Bottom SRT Rack -- bottomSRTrack
KERNEL=="hiddev*", ATTRS{manufacturer}=="American Power Conversion", ATTRS{serial}=="SerialXXX", OWNER="root", GROUP="100000", MODE="0666", SYMLINK+="usb/ups-bottomSRTrack"


then using this command udevadm trigger --verbose --sysname-match=hiddev*
I am trying to map /SYMLINK the ups's and I am getting this error.

/sys/devices/pci0000:00/0000:00:14.0/usb1/1-11/1-11.3/1-11.3.1/1-11.3.1.1/1-11.3.1.1:1.0/usbmisc/hiddev3
hiddev3: Failed to write 'change' to '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-11/1-11.3/1-11.3.1/1-11.3.1.1/1-11.3.1.1:1.0/usbmisc/hiddev3/uevent': Read-only file system

I have tried to change permissions but not working with.

chown 100000:100000 /dev/usb

root@apc-node-red:/dev/usb# ls
hiddev0 hiddev1 hiddev2 hiddev3 hiddev4 hiddev5 hiddev6
root@apc-node-red:/dev/usb# chown 100000:100000 /dev/usb
root@apc-node-red:/dev/usb# ls -l /dev/usb
total 0
crw------- 1 root root 180, 0 Jun 17 16:25 hiddev0
crw------- 1 root root 180, 1 Jun 17 16:25 hiddev1
crw------- 1 root root 180, 2 Jun 17 16:25 hiddev2
crw------- 1 root root 180, 3 Jun 17 16:25 hiddev3
crw------- 1 root root 180, 4 Jun 17 16:25 hiddev4
crw------- 1 root root 180, 5 Jun 17 16:25 hiddev5
crw------- 1 root root 180, 6 Jun 17 16:25 hiddev6
root@apc-node-red:/dev/usb#

Any idea how I can try and fix this?

Thanks!
Click to expand...
I found a workaround, that makes it work.
Not sure if this is correct and not supposed to do it on the host level or if I it is best practice to only do it on the container level.

On the proxmox HOST, I created my ups.rules files after, then I ran the udevadm trigger --verbose --sysname-match=hiddev* and it linked all of the files and it started communicating!
 
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