Proxmox

 

 

Links

• Proxmox VE Administration Guide
• https://pve.proxmox.com/wiki Wiki
• Monitoring Proxmox with Zabbix
• Proxmox Backup Server
• Backup and Restore

 

 

Documentation

Directory structure

/var/lib/vz

/var/lib/vz/template/iso

Proxmox cluster

https://pve.proxmox.com/wiki/Cluster_Manager

Cluster manager

pvecm status
pvecm nodes

 

HA status

ha-manager status

Monitoring proxmox with zabbix

https://github.com/takala-jp/zabbix-proxmox

FAQ

Proxmox API call failed: Couldn't authenticate user: zabbix@pve

Funky characters in password string?

 

Failed to establish a new connection: [Errno -2] Name or service not known

Just that, check your DNS

FAQ

Clustering

Show cluster status

pvecm status

It seems relatively safe to restart corosync

https://blog.jenningsga.com/proxmox-keeping-quorum-with-qdevices/

https://pve.proxmox.com/pve-docs/chapter-pvecm.html#_corosync_external_vote_support

corosync-qdevice[11695]: Can't read quorum.device.model cmap key

On the qdevice node

Check corosync-cmapctl ?

also see https://pve.proxmox.com/pve-docs/chapter-pvecm.html#_corosync_external_vote_support

"Quorum: 2 Activity blocked"

In my case this meant boot up second real node first

 

 

On working node:

corosync-cmapctl | grep quorum.device
quorum.device.model (str) = net
quorum.device.net.algorithm (str) = ffsplit
quorum.device.net.host (str) = 192.168.178.2
quorum.device.net.tls (str) = on
quorum.device.votes (u32) = 1

https://bugs.launchpad.net/ubuntu/+source/corosync-qdevice/+bug/1733889

 

 

 

 

Shutting down a node

Should just work. Takes guests down with it when they're not in HA

Cores, sockets and vCPUs

vCPUs is what the vm uses, equals sockets*cores

 

 

Migrating

VM is locked (create) (500)

Not always clear why, but try

qm unlock 111

 

 

 

Replication

missing replicate feature on volume 'local-lvm

looks like replication of lvm isn't supported

Check if qemu agent is running

See if IP is shown under Summary, also

qm agent 105 ping

Move to unused disk

If you moved disk, and decided to move back to the old one:

• detach current disk
• select the unused disk
• click Add

Stop all proxmox services

systemctl stop pve-cluster systemctl stop pvedaemon systemctl stop pveproxy systemctl stop pvestatd

Storage (xx) not available on selected target

probably some storage mounted only on one node, so not clustered

 

switch to community repository

cat /etc/apt/sources.list.d/pve-enterprise.list 
#deb https://enterprise.proxmox.com/debian/pve buster pve-enterprise

echo "deb http://download.proxmox.com/debian/pve buster pve-no-subscription" > /etc/apt/sources.list.d/pve-no-subscription.list 

apt update

W: (pve-apt-hook) You are attempting to remove the meta-package 'proxmox-ve'!

cehck sources.list :)

 

 

 

 

 

 

 

Backups

PBS GC & Prune scheduling

https://pbs.proxmox.com/docs/prune-simulator/

qmp command 'backup' failed - got timeout

https://github.com/proxmox/qemu/blob/master/qmp-commands.hx

 

proxmox-backup-client

export PBS_REPOSITORY="backup@pbs@pbs-server:backuprepo"

proxmox-backup-client snapshot list

proxmox-backup-client prune vm/101 --dry-run --keep-daily 7 --keep-weekly 3

proxmox-backup-client garbage-collect

dirty-bitmap status: existing bitmap was invalid and has been cleared

• https://qemu-project.gitlab.io/qemu/interop/bitmaps.html

 

unexpected property 'prune-backups' (500)

When for example Add: iSCSI Uncheck "Keep all backups" in "Backup retention"

 

FAILED 00:00:02 unable to activate storage

TODO

 

VM 101 Backup failed: VM is locked (snapshot)

Check if there's no snapshot running (how?)

qm unlock 101

can't acquire lock '/var/run/vzdump.lock' - got timeout

Check if vzdump is running, otherwise kill it (cluster?)

 

VM 101 Backup failed::= VM is locked (snapshot-delete)

Check /etc/pve/qemu-server/101.conf for 'snapstate'

If that says 'delete' for a snapshot try deleting the snapshot:

qm delsnapshot 101 snapname

If that throws like Failed to find logical volume 'pve/snap_vm-101-disk-0_saving'

 qm delsnapshot 101 snapname --force

to get it out of 101.conf

Error: VM quit/powerdown failed - got timeout

qm stop VMID

if that complains about lock, remove the lock and try again

 

serial console from command line

qm terminal <id}

enable serial console in guest

• https://pve.proxmox.com/wiki/Serial_Terminal

looks like this is not needed:

systemctl enable serial-getty@ttyS0.service

in /etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT="console=ttyS0 console=tty0"

ttyS0 is for qm terminal, tty0 is for the "console" buttion in UI

1. debian based

update-grub

1. redhat based

grub2-mkconfig --output=/boot/grub2/grub.cfg

 

add

serial0: socket

to /etc/pve/qemu-server/[vmid].conf and restart

 

agetty: /dev/ttyS0: not a device

systemctl status useless again, means the serial bit is missing from <vmid>.conf

TASK ERROR: command 'apt-get update' failed: exit code 100

subtle way of telling you to get subscription of at least change the sources list

Import vmdk to lvm

https://pve.proxmox.com/wiki/Qemu/KVM_Virtual_Machines#_importing_virtual_machines_and_disk_images

Can't apply changes to memory allocation

Maybe try enabling NUMA in CPU settings

 

 

Adding hardware shows orange

something is not supported (Options->Hotplug)

"Connection error 401: no ticket"

Login session expired?

can't lock file '/var/lock/qemu-server/lock-102.conf' - got timeout (500)

Maybe someone else has/had webui open

== TASK ERROR: Can't use string ("keep-all=0,keep-last=3") as a HASH ref while "strict refs" in use at /usr/share/perl5/PVE/VZDump.pm line 502. ==

Classic, means incorrect syntax in your /etc/pve/storage.cfg

 

The current guest configuration does not support taking new snapshots

You're using raw instead of qcow2. Convert: Hardware->Hard disk "Move Disk"

 

 

WARNING: Device /dev/dm-21 not initialized in udev database even after waiting 10000000 microseconds.

Until someone fixes it:

udevadm trigger
      

Also look for link to dm-21 in /dev/disk/by-id

"connection error - server offline?"

Try reconnection browser

 

 

Find vm name by id

grep name: /etc/pve/nodes/*/qemu-server/101.conf |head -n 1 | cut -d ' ' -f 2

Started Proxmox VE replication runner.

??

Find ID by name

grep -l "name: <NAME>"  /etc/pve/nodes/*/qemu-server/*conf| sed 's/^.*\/\([0-9]*\)\.conf/\1/g'
      

 

Can't migrate VM with local CD/DVD

Remove the CD :)

 

Memory allocated to VMs

qm list|grep -v VM| awk '{ sum+=$4 } END { print sum }'

Ceph

Got timeout(500)

Check

pveceph status

Possibly problem with ceph mgr