Get noisy neighbor VMs 

source /etc/kolla/admin-openrc.sh
 
IFS=$(echo -en "\n\b")
 
function get_vm_details() {
    LINE=$1
 
    SERVER_ID=$(echo ${LINE} | cut -d" " -f3)
    SERVER_JSON=$(openstack server show ${SERVER_ID} -f json)
    SERVER_NAME=$(echo ${SERVER_JSON} | jq -r .name)
    SERVER_PROJECT_ID=$(echo ${SERVER_JSON} | jq -r .project_id)
    SERVER_PROJECT_JSON=$(openstack project show ${SERVER_PROJECT_ID} -f json)
    SERVER_PROJECT_NAME=$(echo ${SERVER_PROJECT_JSON} | jq -r .name)
 
    echo "${LINE} ${SERVER_NAME} ${SERVER_PROJECT_NAME}"
}
 

Ubuntu 20.04 Focal Fossa LTS

Schedule
https://wiki.ubuntu.com/FocalFossa/ReleaseSchedule

ReleaseNotes
https://wiki.ubuntu.com/FocalFossa/ReleaseNotes

Known issues
https://wiki.ubuntu.com/FocalFossa/ReleaseNotes#Known_issues

Download
Releases: http://releases.ubuntu.com/20.04/
Cloud image (minimal): https://cloud-images.ubuntu.com/minimal/daily/focal/current/focal-minimal-cloudimg-amd64.img
Netboot: http://archive.ubuntu.com/ubuntu/dists/focal/main/installer-amd64/current/images/netboot/mini.iso
Torrent: http://releases.ubuntu.com/20.04/ubuntu-20.04-desktop-amd64.iso.torrent

Repository

echo "deb http://de.archive.ubuntu.com/ubuntu focal main restricted universe multiverse" \
    sudo tee /etc/apt/sources.list.d/ubuntu-focal.list
echo "deb http://de.archive.ubuntu.com/ubuntu focal-updates main restricted universe multiverse" \
    sudo tee /etc/apt/sources.list.d/ubuntu-focal-updates.list
 
sudo apt update

Workarounds

Mellanox ConnectX-3 Pro UEFI iPXE boot 

  Device Type:      ConnectX3Pro
  Part Number:      MCX312B-XCC_Ax
  Description:      ConnectX-3 Pro EN network interface card; 10GigE; dual-port SFP+; PCIe3.0 x8 8GT/s; RoHS R6
  PSID:             MT_1200111023
  PCI Device Name:  /dev/mst/mt4103_pci_cr0
  Port1 MAC:        ec0d9a00aab1
  Port2 MAC:        ec0d9a00aab2
  Versions:         Current        Available    
     FW             2.42.5000      N/A          
     PXE            3.4.0752       N/A

Flash UEFI firmware
Request UEFI firmware from support@mellanox.com
http://www.panticz.de/mellanox/firmware-update

flint -y -d /dev/mst/mt4103_pci_cr0 -i firmware fw-ConnectX3Pro-rel-2_42_5000-MCX312B-XCC_Ax-FlexBoot-3.4.752-UEFI-14.11.46.bin b
  Device Type:      ConnectX3Pro
  Part Number:      MCX312B-XCC_Ax
  Description:      ConnectX-3 Pro EN network interface card; 10GigE; dual-port SFP+; PCIe3.0 x8 8GT/s; RoHS R6
  PSID:             MT_1200111023
  PCI Device Name:  /dev/mst/mt4103_pci_cr0
  Port1 MAC:        ec0d9a00aab1
  Port2 MAC:        ec0d9a00aab2
  Versions:         Current        Available    
     FW             2.42.5000      N/A          
     PXE            3.4.0752       N/A          
     UEFI           14.11.0046     N/A

Fix iPXE boot issue (recompile ipxe.efi) when connected to LACP swith port
http://www.panticz.de/ipxe/compile

Yamaha RX-D485 / RX-V485

Yamaha Web Control
Live demo: http://yamaha.panticz.de/
Repository: https://github.com/panticz/yamaha-web-control

API

curl -q http://192.168.178.4/YamahaExtendedControl/v1/system/getFeatures  | jq .

Control
# Volume Up / Down
http://192.168.178.4/YamahaExtendedControl/v1/main/setVolume?volume=up&step=5
http://192.168.178.4/YamahaExtendedControl/v1/main/setVolume?volume=down&step=5

# Change input
http://192.168.178.4/YamahaExtendedControl/v1/main/prepareInputChange?input=usb
http://192.168.178.4/YamahaExtendedControl/v1/main/setInput?input=net_radio
http://192.168.178.4/YamahaExtendedControl/v1/main/setInput?input=server
http://192.168.178.4/YamahaExtendedControl/v1/main/setInput?input=spotify

# Power
http://192.168.178.4/YamahaExtendedControl/v1/main/setPower?power=on
http://192.168.178.4/YamahaExtendedControl/v1/main/setPower?power=standby

# Get Device info
http://192.168.178.4/YamahaExtendedControl/v1/system/getDeviceInfo

# Get Available Device Features
http://192.168.178.4/YamahaExtendedControl/v1/system/getFeatures

# Get Network Status
http://192.168.178.4/YamahaExtendedControl/v1/system/getNetworkStatus

# Get Function Status (e.g.: Auto Power Standby)
http://192.168.178.4/YamahaExtendedControl/v1/system/getFuncStatus

# Get Location info and zone list (device)
http://192.168.178.4/YamahaExtendedControl/v1/system/getLocationInfo

# Get zone info (device|zone)
http://192.168.178.4/YamahaExtendedControl/v1/main/getStatus

# Get Sound Program List (device|zone)
http://192.168.178.4/YamahaExtendedControl/v1/main/getSoundProgramList

Move Elasticsearch data to dedicated LV 

# create lvm
pvcreate /dev/disk/by-id/ata-INTEL_SSDSC2KB076T8_*
vgcreate data /dev/disk/by-id/ata-INTEL_SSDSC2KB076T8_*
lvcreate --name elasticsearch --size 2T data
mkfs.ext4 /dev/data/elasticsearch
 
# pre-sync data
mount /dev/data/elasticsearch /mnt/
rsync -aHAXx --numeric-ids /var/lib/docker/volumes/elasticsearch/ /mnt/
 
# sync data
docker stop elasticsearch
rsync --delete -aHAXxv --numeric-ids /var/lib/docker/volumes/elasticsearch/ /mnt/
rsync --delete -aHAXxv --numeric-ids /var/lib/docker/volumes/elasticsearch/ /mnt/
umount /mnt
 
# mount new LV

SSH reverse tunel over public host

@Office

cat <<EOF> ~/bin/proxy-ssh-forward.sh
#!/bin/bash
 
PROXY_SERVER=proxy.example.com
 
eval \$(ssh-agent) && ssh-add
 
while true; do
    echo "Connect to proxy ..."
    ssh -a -v -N -R 7422:localhost:22 -o ServerAliveInterval=30 -o ServerAliveCountMax=10 \${PROXY_SERVER}
    sleep 10
done
EOF
 
chmod +x ~/bin/proxy-ssh-forward.sh
nohup ~/bin/proxy-ssh-forward.sh

@Home

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