ubuntu 26 cloud template hostname on first start

Запись создана 10 сентября, 2026

Found a nasty bug in creating a VM from cloud template. On a first bot VM created from template sends to dhcp server an argument of hostname the templates name

for exmaple you clone a template called ‘ubuntu-26’ as ‘stage-server’, on a boot it starts a network before applying a cloud-init and hostname from it
So in DHCP you see a VM with name ubuntu-26 and thats a big problem when you use ddns to set a dns record in your network

After reboot it works as it should, but i don’t want to restart every VM on creating, so here workaround for template

cat >/etc/systemd/system/netplan-apply-after-cloud-init.service <<'EOF'
[Unit]
Description=Reapply netplan after cloud-init hostname setup
After=cloud-init.target
Wants=cloud-init.target
ConditionFirstBoot=yes
 
[Service]
Type=oneshot
ExecStart=/usr/sbin/netplan apply
RemainAfterExit=yes
 
[Install]
WantedBy=default.target
EOF
systemctl daemon-reload
systemctl disable netplan-apply-after-cloud-init.service
systemctl enable netplan-apply-after-cloud-init.service
 
  rm -f /etc/hostname
  cloud-init clean --logs --machine-id
  history -c 
  rm -rf .bash_history 
  shutdown -h now

now convert it back to template

sudo qm template 9026

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HPE Ethernet 1Gb 4-port 331i Adapter Gen9

Запись создана 30 июля, 2026

HPE Broadcom NX1 Online Firmware Upgrade Utility Linux x86_64 for ProLiant Gen9 server Only

This software package contains combo image v20.19.51

rpm2cpio firmware-nic-broadcom-2.29.0-1.1.x86_64.rpm | cpio -idmv
cd ./usr/lib/x86_64-linux-gnu/firmware-nic-broadcom-2.29.0-1.1
 ./hpsetup
Copyright (c) 2021 Hewlett Packard Enterprise Development LP
HPE Broadcom NX1 Online Firmware Upgrade Utility for Linux x86_64 - v2.29.0
 
 
Found HPE Ethernet 1Gb 4-port 331i Adapter MAC: 3863BB40B7A0      
Do you want to update the following firmware on eno1 :
nvm   20.18.31 to 20.19.51 - y/n/q (Default option is 'y' when you simply press enter):y
 
 
The Firmware Upgrade may take several minutes. Please be patient.
 
 
Selecting HPE Ethernet 1Gb 4-port 331i Adapter MAC: 3863BB40B7A0 
Updating the following firmware on eno1 :
nvm   20.18.31 to 20.19.51
Firmware (nvm) upgrade on MAC 3863BB40B7A0 SUCCESSFUL
 
NIC firmware update completed successfully.
 
Reboot is required for the new firmware to take effect.

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HPE 530FLR-SFP+ firmware

Запись создана 30 июля, 2026

the latest one available on official website is combo image 7.14.79
Version 2.18.44 support.hpe.com

Release Date Oct 24, 2016, over the 10 years without an update..

Is you have a vmware you can use CP029553.zip to upgrade to the combo image v7.14.81
https://downloads.hpe.com/pub/softlib2/software1/sc-linux-fw/p1955087049/v117588/CP029553.zip

apt install rpm2cpio
rpm2cpio hp-firmware-nic-qlogic-nx2-2.18.44-1.1.x86_64.rpm | cpio -idmv
cd ./usr/lib/x86_64-linux-gnu/hp-firmware-nic-qlogic-nx2-2.18.44-1.1
./hpsetup
Copyright (c) 2016 Hewlett Packard Enterprise Development LP
HPE QLogic NX2 Online Firmware Upgrade Utility for Linux x86_64 - v2.18.44
 
Found HP Ethernet 10Gb 2-port 530FLR-SFP+ Adapter MAC: ECB1D77B0DE8
Do you want to update the following firmware on eno49 :
MBI 7.10.5 to 7.14.79 - y/n/q (Default option is 'y' when you simply press enter):y
 
The Firmware Upgrade may take several minutes. Please be patient.
 
Selecting HP Ethernet 10Gb 2-port 530FLR-SFP+ Adapter MAC: ECB1D77B0DE8
Updating the following firmware on eno49 :
MBI 7.10.5 to 7.14.79
 
Firmware (MBI) upgrade on MAC ECB1D77B0DE8 SUCCESSFUL
 
NIC firmware update completed successfully.
 
Reboot is required for the new firmware to take effect.

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zfs transfer between servers

Запись создана 21 ноября, 2025

zfs snapshot rpool/data/vm-119-disk-0@migration
zfs send -Rpv rpool/data/vm-119-disk-0@migration | ssh -o BatchMode=yes root@pve-n10 zfs recv -Fv rpool/data/vm-119-disk-0

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nf_conntrack limit

Запись создана 24 октября, 2025 

cat /proc/sys/net/netfilter/nf_conntrack_max 
cat /proc/sys/net/netfilter/nf_conntrack_count
echo "net.netfilter.nf_conntrack_max=16384" > /etc/sysctl.d/10-conntrack-max.conf

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Smart HBA H240 firmware update under Debian

Запись создана 3 июля, 2025 

curl -fL -o "firmware-smartarray-ea3138d8e8-7.20-1.1.x86_64.rpm" https://downloads.hpe.com/pub/softlib2/software1/sc-linux-fw-array/p773315150/v176861/rpm/RPMS/x86_64/
 
firmware-smartarray-ea3138d8e8-7.20-1.1.x86_64.rpm
 
apt install rpm2cpio
 
rpm2cpio firmware-smartarray-ea3138d8e8-7.20-1.1.x86_64.rpm  | cpio -idmv
 
./usr/lib/x86_64-linux-gnu/firmware-smartarray-ea3138d8e8-7.20-1.1/setup 
Supplemental Update / Online ROM Flash Component for Linux (x64) - Smart Array and Smart HBA H240ar, H240nr, H240, H241, H244br, P240nr, P244br, P246br, P440ar, P440, P441, P542D, P741m, P840, P840ar, and  P841 (7.20), searching...
1) Smart HBA H240 in Slot 1 (7.00)
Select which devices to flash [#,#-#,(A)ll,(N)one]> 1
Flashing Smart HBA H240 in Slot 1 [ 7.00 -> 7.20 ]
Deferred flashes will be performed on next system reboot
============ Summary ============
Smart Component Finished
 
Summary Messages
================
Reboot needed to activate 1 new FW image
 
Exit Status: 1
Deferred flashes will be performed on next system reboot
A reboot is required to complete update.

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Windows Server 2019 2022 samba share access

Запись создана 20 июня, 2025 

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters] 
DWORD   AllowInsecureGuestAuth  1

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отключаем раздел восстановления Windows Server 2022

Запись создана 20 июня, 2025 

reagentc /disable

удаляем раздел

diskpart
list volume
select volume 4
delete partition override
exit

Включаем восстановление на системный диск

reagentc /setreimage /path C:\windows\system32\recovery
reagentc /enable

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RTSP web translation server

Запись создана 12 марта, 2025

Put this in to docker-compose.yml

---
services:
  restreamer:
    image: datarhei/restreamer:latest
    container_name: restreamer
    restart: always
    ports:
      - 80:8080
      - 8181:8181
      - 1935:1935
      - 1936:1936
      - 6000:6000/udp
    volumes:
      - /opt/restreamer/config:/core/config
      - /opt/restreamer/data:/core/data

and run

docker compose up -d
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microk8s disk consumption

Запись создана 12 февраля, 2025 

24G	/var/snap/microk8s/common/var/lib/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots

add this strings to /var/snap/microk8s/current/args/kubelet

--image-gc-high-threshold=50
--image-gc-low-threshold=40
--maximum-dead-containers=0

and restart 

snap restart microk8s

and you will see 

9.1G	/var/snap/microk8s/common/var/lib/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots

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