Welcome to my world
When adding another node to the proxmox cluster and the LVM is missing it is not possible to add it correctly over the web interface. But here is how it works.
lsblk vgcreate pve /dev/sdc lvcreate -L 30G -n data pve lvconvert --type thin-pool pve/data
delete the VLM (just in case you need it)
lvchange -an /dev/data/data
To solve this add a new file
/etc/dnsmasq.d/99-edns.conf
in this file add a single line:
edns-packet-max=1232
restart your DNS resolver
Let’s say I want to copy/cut lines 34 to 65. I use :34,65y (Copy/Yank) or :34,65d (Cut/Delete).
TL;DR
ss -tulpn | grep -v "::1" | grep -v "127.0.0.1"
When ssh into a server I want to start directly tmux or use an existing session.
ssh example.local -t "tmux a || tmux"
While trying to connect to an older esxi server I got the error message Unable to negotiate with 1.2.3.4 port 22: no matching host key type found. Their offer: ssh-rsa,ssh-dss
I was wondering.
The solution $EDITOR ~/.ssh/config
Host 1.2.3.4
User root
HostKeyAlgorithms=+ssh-dss
The error message on the proxmox gui
() Job for ceph-mgr@pve-03.service failed. See "systemctl status ceph-mgr@pve-03.service" and "journalctl -xe" for details. TASK ERROR: command '/bin/systemctl start ceph-mgr@pve-03' failed: exit code 1
The error message from systemctl
ceph-mgr@pve-03.service: Start request repeated too quickly. ceph-mgr@pve-03.service: Failed with result 'start-limit-hit'.
Solve with
systemctl reset-failed ceph-mgr@pve-03 systemctl start ceph-mgr@pve-03
change pve-03 to your node name.
zfs send ... | ssh host2 zfs receive -s otherpool/new-fs
On the receiving side, get the opaque token with the DMU object #, offset stored in it
zfs send ... | ssh host2 zfs receive -s otherpool/new-fs zfs get receive_resume_token otherpool/new-fs # 1-e604ea4bf-e0-789c63a2...
Re-start sending from the DMU object #, offset stored in the token
zfs send -t 1-e604ea4bf-e0-789c63a2... | ssh host2 zfs receive -s otherpool/new-fs
If you don’t want to resume the send, abort to remove the partial state on the receiving system
zfs receive -A otherpool/new-fs
Edit
/etc/zfs/zed.d/zed.rc
uncomment
ZED_EMAIL_ADDR="mail@example.com"
and add a valid email address.
uncomment
ZED_EMAIL_PROG="mail"
uncomment
ZED_EMAIL_OPTS="-s '@SUBJECT@' @ADDRESS@"
uncomment
ZED_NOTIFY_VERBOSE=0
if you want to get an email after every scrup set the value to 1
save the file and restart zed service
systemctl restart zed.service
A single disk zpool “test” crashed on my server (the disk died). It was just for testing, so nothing dramatic. However, when I rebooted the server I got the error message “failed Import ZFS pools by cache file”. A zpool destroy -f did not solve the problem. zpool status still showed the “test” pool. The other pool tank was still working.
What did help was
# disable the cache file for the existing pool(s) zpool set cachefile=none tank # delete the old pool file rm -rf /etc/zfs/zpool.cache # recreate if touch /etc/zfs/zpool.cache reboot # re-enable the cache zpool set cachefile=/etc/zfs/zpool.cache tank
Well, the cache file should be automatically updated when your pool configuration is changed, but with the crashed pool it did not.