linux

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Visual Studio Code

# deb download
# https://code.visualstudio.com/docs/setup/linux
curl https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor > microsoft.gpg
sudo install -o root -g root -m 644 microsoft.gpg /etc/apt/trusted.gpg.d/
sudo sh -c 'echo "deb [arch=amd64] https://packages.microsoft.com/repos/vscode stable main" > /etc/apt/sources.list.d/vscode.list'

sudo apt-get install apt-transport-https
sudo apt-get update
sudo apt-get install code # or code-insiders

# manual download
wget -q https://update.code.visualstudio.com/latest/linux-deb-x64/stable -O /tmp/code.deb

haproxy

Check configuration
haproxy -c -f /etc/haproxy/haproxy.cfg

Check status
systemctl status haproxy

# prometheus
https://www.haproxy.com/blog/haproxy-exposes-a-prometheus-metrics-endpoint/

unbound

/etc/unbound/unbound.conf.d/forward.conf
# unbound forward-zone output
for IP in $(consul catalog nodes | grep ctl | cut -d " " -f6); do
echo " forward-addr: ${IP}@53"
done
systemctl restart unbound

UEFI

# list entry
efibootmgr -v

#delete entry
efibootmgr -b 0012 -B

grub-install --efi-directory=/mnt/efi

efibootmgr --create --disk /dev/sda --part 1 --label "Ubuntu /dev/sda" --loader \\EFI\\UBUNTU\\GRUBX64.EFI

Links
https://wiki.archlinux.de/title/UEFI_Installation

Enable UEFI / PXE boot on Mellanox ConnectX NIC

# Boot GRML iso
https://grml.org/download/

# Enable SSH daemon
service ssh start
passwd
ip a

# ssh root@GRML_IP

# Install Mellanox CLI tools (MFT)
http://www.mellanox.com/page/management_tools
apt update
apt install -y gcc make dkms linux-headers-$(uname -r)
URL=http://www.mellanox.com/downloads/MFT/mft-4.11.0-103-x86_64-deb.tgz
wget -O- ${URL} | tar xvz -C /tmp
/tmp/mft-*-deb/install.sh
mst start

# show mellanox devices / state
mst status
flint -d /dev/mst/mt4119_pciconf0 q

# Enable UEFI and PXE boot
for MST in $(ls /dev/mst/* | egrep -v '\.1'); do

Kubernetes

kubectl Cheat Sheet
https://kubernetes.io/docs/reference/kubectl/cheatsheet/

Dump Kubernetes Objects
kubectl get componentstatuses
kubectl get configmaps
kubectl get daemonsets
kubectl get deployments
kubectl get events
kubectl get endpoints
kubectl get horizontalpodautoscalers
kubectl get ingress
kubectl get jobs
kubectl get limitranges
kubectl get nodes
kubectl get namespaces
kubectl get pods
kubectl get pods --all-namespaces -o wide
kubectl get persistentvolumes
kubectl get persistentvolumeclaims
kubectl get quota

Vault

Install
wget https://releases.hashicorp.com/vault/0.11.5/vault_0.11.5_linux_amd64.zip -P /tmp/
apt install -y unzip
unzip -d /usr/sbin /tmp/vault_0.11.5_linux_amd64.zip
vault -autocomplete-install

Linux
https://learn.hashicorp.com/vault/

Duplicity with S3

Install
sudo apt install -y duplicity python-boto

SSH
duplicity incr --log-file /tmp/duplicity.log /etc/ scp://foo@10.0.1.123//media/etc

S3
vi ~/.boto
[Credentials]
aws_access_key_id = KEY_ID
aws_secret_access_key = SECRET_ACCESS_KEY

# create backup to s3
duplicity full --log-file /tmp/duplicity.log /etc/ s3://s3.example.com/backup/host.examp.eocm/etc/

duplicity list-current-files s3+http://bucket/folder

WebDav
export FTP_PASSWORD="pass1234"

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