After latest update: cat: /proc/uptime: Transport endpoint is not connected

[Proxygen]

uptime=$(cat /proc/uptime | sed 's/\..*$//' | tr -d '[:blank:]')

is something i use on the host a lot for several cronjob scripts. after the latest update, it gives

cat: /proc/uptime: Transport endpoint is not connected

i can change the scripts to remove this, but there are a lot of them. currently I am unable to monitor a lot of things in the guests.

 

[oguz]

hi,

works here for me. what's your pveversion -v?

 

[Proxygen]

thanks for the quick reply, oguz

proxmox-ve: 6.1-2 (running kernel: 5.3.18-2-pve)
pve-manager: 6.1-8 (running version: 6.1-8/806edfe1)
pve-kernel-helper: 6.1-7
pve-kernel-5.3: 6.1-5
pve-kernel-5.0: 6.0-11
pve-kernel-5.3.18-2-pve: 5.3.18-2
pve-kernel-5.3.18-1-pve: 5.3.18-1
pve-kernel-5.0.21-5-pve: 5.0.21-10
ceph-fuse: 12.2.11+dfsg1-2.1+b1
corosync: 3.0.3-pve1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown: residual config
ifupdown2: 2.0.1-1+pve7
libjs-extjs: 6.0.1-10
libknet1: 1.15-pve1
libpve-access-control: 6.0-6
libpve-apiclient-perl: 3.0-3
libpve-common-perl: 6.0-15
libpve-guest-common-perl: 3.0-3
libpve-http-server-perl: 3.0-5
libpve-storage-perl: 6.1-5
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 3.2.1-1
lxcfs: 4.0.0-pve1
novnc-pve: 1.1.0-1
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.1-3
pve-cluster: 6.1-4
pve-container: 3.0-21
pve-docs: 6.1-6
pve-edk2-firmware: 2.20200229-1
pve-firewall: 4.0-10
pve-firmware: 3.0-6
pve-ha-manager: 3.0-8
pve-i18n: 2.0-4
pve-qemu-kvm: 4.1.1-4
pve-xtermjs: 4.3.0-1
qemu-server: 6.1-7
smartmontools: 7.1-pve2
spiceterm: 3.1-1
vncterm: 1.6-1
zfsutils-linux: 0.8.3-pve1

 

[oguz]

it works from the cli, but not in the script.

hmm okay.

how do you run the script? maybe a snippet will be helpful

 

[Proxygen]

I misspoke. I have the uptime check on both host and guest. it does not work on the guest

/usr/sbin/pct exec 110 -- bash -c "cat /proc/uptime | sed 's/\..*$//' | tr -d '[:blank:]'"

or simply

/usr/sbin/pct exec 110 -- bash -c "cat /proc/uptime"

it doesn't work from the cli either. sorry not enough coffee yet.

 

[oguz]

okay still works in my container with the command you sent.

what's in the CT? can you post the config? what's running in it?

 

[Proxygen]

it doesn't work on any of the 15 cts, exactly after the update last night.

# pct enter 107
root@one1:~/scripts# cat /proc/uptime
cat: /proc/uptime: Transport endpoint is not connected
root@one1:~/scripts# exit
exit
root@node2:~/scripts# cat /etc/pve/lxc/107.conf
arch: amd64
cores: 4
hostname: blah
memory: 2048
net0: name=eth0,bridge=vmbr1,gw=10.10.10.1,hwaddr=a:b:c:d:e,ip=10.10.10.107/24,type=veth
onboot: 1
ostype: ubuntu
protection: 1
rootfs: lvmt_containers1-nvme1:vm-107-disk-0,mountoptions=noatime,size=25G
swap: 1024
unprivileged: 1

CT configs have not changed.

 

[oguz]

did you reboot after the update?

i can't reproduce the issue unfortunately so i'm guessing something with your setup must be causing it.

 

[Proxygen]

did you reboot after the update?

i can't reproduce the issue unfortunately so i'm guessing something with your setup must be causing it.

did not reboot. I can't reboot frequently.

 

[Proxygen]

the config on 20 containers did not change, only the update. it is mounted on 107:

mount | grep /proc
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
proc on /proc/sys/net type proc (rw,nosuid,nodev,noexec,relatime)
proc on /proc/sys type proc (ro,nosuid,nodev,noexec,relatime)
proc on /proc/sysrq-trigger type proc (ro,nosuid,nodev,noexec,relatime)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,relatime)
lxcfs on /proc/cpuinfo type fuse.lxcfs (rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other)
lxcfs on /proc/diskstats type fuse.lxcfs (rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other)
lxcfs on /proc/loadavg type fuse.lxcfs (rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other)
lxcfs on /proc/meminfo type fuse.lxcfs (rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other)
lxcfs on /proc/stat type fuse.lxcfs (rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other)
lxcfs on /proc/swaps type fuse.lxcfs (rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other)
lxcfs on /proc/uptime type fuse.lxcfs (rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other)

 

[Proxygen]

but cat /proc/version works

permissions for the mount point??

# chown nobody:nogroup /proc/uptime chown: cannot access '/proc/uptime': Transport endpoint is not connected

 

[Proxygen]

see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=920985 and https://github.com/lxc/lxd/issues/4009#issuecomment-342771036

 

[Proxygen]

all the containers have to be restarted to fix it.