Blog

Deploy Sampleapp on Kuberentes …

Prerequisite

• Domain “kubbi.xyz”, ns1.digitalocean.com, ns2, ns3 …
• Digital Ocean Login

Doku

https://docs.digitalocean.com/products/kubernetes/getting-started/operational-readiness/

Build Kubbi Cluster

Build Cluster with WebGUI or CLI

via CLI

time doctl kubernetes cluster create prod001 --region fra1 --node-pool "size=s-2vcpu-2gb;auto-scale=true;min-nodes=3;max-nodes=5"

• FRA1
• 3 Nodes
• 2 CPU
• 2 GB RAM
• 60 GB Disk
• Costs: 54 USD/Mt!

Connecting and managing this cluster

doctl kubernetes cluster kubeconfig save 4375b470-ebe8-4ccb-925a-345df364dfbd

user@mac % doctl kubernetes cluster kubeconfig save 4375b470-ebe8-4ccb-925a-345df364dfbd


Notice: Adding cluster credentials to kubeconfig file found in "/Users/user/.kube/config"
Notice: Setting current-context to do-fra1-k8s-1-28-2-do-0-fra1-1702031438694

kubectl config get-contexts

kubectl config get-contexts

user@mac % kubectl config get-contexts

CURRENT   NAME                                         CLUSTER                                      AUTHINFO                                           NAMESPACE
*         do-fra1-prod-cluster-01                      do-fra1-prod-cluster-01                      do-fra1-prod-cluster-01-admin

kubectl cluster-info

kubectl cluster-info

user@mac % kubectl cluster-info

Kubernetes control plane is running at https://f179692f-aeac-4f9c-af3b-2422897ea578.k8s.ondigitalocean.com
CoreDNS is running at https://f179692f-aeac-4f9c-af3b-2422897ea578.k8s.ondigitalocean.com/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy

To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.

kubectl version

kubectl version

user@mac % kubectl version

Client Version: v1.28.2
Kustomize Version: v5.0.4-0.20230601165947-6ce0bf390ce3
Server Version: v1.28.2

kubectl get nodes

kubectl get nodes

user@mac % kubectl get nodes

NAME                    STATUS   ROLES    AGE     VERSION
prod-cluster-01-xa856   Ready    <none>   3m59s   v1.28.2
prod-cluster-01-xa85a   Ready    <none>   4m7s    v1.28.2

Install Nginx Ingress Controller

• via GUI / Marketplace / NGINX Ingress Controller

show lbl status

doctl compute load-balancer list --format IP,ID,Name,Status

user@mac % doctl compute load-balancer list --format IP,ID,Name,Status

IP    ID                                      Name                                Status
      55d7381d-9bcd-4f8f-905e-e90efd09f03e    a6554a9aff1a340e986d48431e19cca9    new

no ip yet … wait …

vnstat

wanna install vnstat on your mac ?

install

brew install vnstat gsed

and you’ll get the following Message after installation:

==> vnstat
To monitor interfaces other than "en0" edit /opt/homebrew/etc/vnstat.conf

To start vnstat now and restart at startup:
  sudo brew services start vnstat
Or, if you don't want/need a background service you can just run:
  /opt/homebrew/opt/vnstat/bin/vnstatd --nodaemon --config /opt/homebrew/etc/vnstat.conf

Service Location

Let’s build a directory for the Database

mkdir ~/Library/vnstat

Path

Depending where you’re config files got installed …

History

Long time ago, there were huge discussions about Python 2.7 or Python 3.xx. Fortunately, these times are gone and we’ve all gotten over the hurdle to Python 3. But are you on 3.6, 3.7, 3.8 ? or even 3.11 or 3.12 ? That’s the current Version you should use for your daily Projects ?

Status of Python versions

A good indicator is this Website: https://devguide.python.org/versions/

OpenBSD

It’s also recommended to check what our Operating System is installing by default, or what you can get from their Package Repository.

Monaspace

Do you like it ? I do …

Install macOS

brew tap homebrew/cask-fonts
brew install font-monaspace

sha256: 9f088f3023c2e5c26817ccddbfb49ea25dd6f08d0ba3ac6e7ca9038f0d2e2547

Minio on Debian

Need some S3 Storage for Reasons ? Here a few Lines, how to Setup and enable TLS.

Install Minio

login as root for the whole installation. Or use sudo/doas if preferred.

Upgrade you Box

apt update && apt upgrade -y

reboot if needed

add User

Let’s add User as we don’t wanna run it as root

useradd -r minio-user -s /sbin/nologin

Get Minio

Download, set execute permission and move it

OpenBSD 7.4 finally released

Today, the 55th Release of OpenBSD was announced. My Upgrade Script is available here.

Highlights

• vmd(8) has moved to a multi-process model for virtio(4) block and network devices
• malloc(3) now has built-in leak detection
• In OpenSSH 9.5, ssh-kengen(1) generates Ed25519 keys by default
• sec(4) for Route Based IPSec VPNs

see the Post on Undeadly for more Details, or the OpenBSD Page …

Script

doas su -
cd /root
ftp https://blog.stoege.net/scripts/.helpers
ftp https://blog.stoege.net/scripts/upgrade_to_74.sh
chmod u+x upgrade_to_74.sh

Execute

do the Upgrade

OpenBSD 7.4

… will be released next week (23. Oct 2023). Why not have a look at the upcomming OS and prepare a VM for Software Development ?

Preparation

grab a fresh VM and Install OpenBSD 7.4

os version

puffy74# sysctl kern.version
kern.version=OpenBSD 7.4 (GENERIC.MP) #1396: Sun Oct  8 09:20:40 MDT 2023
    deraadt@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP

empty vm

puffy74# pkg_info
quirks-6.159        exceptions to pkg_add rules and cache

add go, rust, python

puffy74# pkg_add go rust python3
quirks-6.159 signed on 2023-10-07T10:09:24Z
go-1.21.1: ok
rust-1.72.1:nghttp2-1.56.0: ok
rust-1.72.1:nghttp3-0.15.0: ok
rust-1.72.1:ngtcp2-0.19.1: ok
rust-1.72.1:curl-8.3.0p0: ok
rust-1.72.1:libssh2-1.11.0: ok
rust-1.72.1: ok
python3-3.10p2:xz-5.4.4: ok
python3-3.10p2:sqlite3-3.42.0: ok
python3-3.10p2:libiconv-1.17: ok
python3-3.10p2:gettext-runtime-0.22.2: ok
python3-3.10p2:libffi-3.4.4: ok
python3-3.10p2:bzip2-1.0.8p0: ok
python3-3.10p2:python-3.10.13: ok
python3-3.10p2: ok

show packages

Intro

did you ever heared of Jetporch, short Jet ? Don’t worry, you’re not the only one ;) Jet Project of Jet is being led by Michael DeHaan, the original creator of Ansible. So, expect something like Ansible, faster, written in rust … same same, but different.

Installation on Debian 12

grab a fresh machine and patch it

export DEBIAN_FRONTEND=noninteractive
apt-get clean
apt-get autoclean
apt-get update -y
apt-get upgrade -yq
apt-get dist-upgrade -yq
apt-get autoremove -y

Install Rust from Source

jet needs rustc 1.64. Debian install 1.63 from packages :(

Let’s play with Packages and Libraries

References

• Python Modules
• Poetry Scripts

Switch to Root Folder

cd /some/path/you/want

Create a new Package

poetry new mypackage

add some libraries

poetry add requests

… add some code …

cat << 'EOF' > mypackage/__init__.py
print("importing", __name__)
EOF

cat << 'EOF' > mypackage/main.py
print("importing", __name__)

def test1():
  print("test1")

def test2(name: str):
  print("hello", name)

def test3(name: str, age:int):
  print(f"Hello {name} at age {age}")

if __name__ == "__main__":
  print("This is a Library or Package. You should import it into your Code and not run it directly ...")
EOF

Build Package

poetry build

List Tree

(mypackage-py3.11) stoege@host:~/git/demo/mypackage> tree
.
├── README.md
├── dist
│   ├── mypackage-0.1.0-py3-none-any.whl
│   └── mypackage-0.1.0.tar.gz
├── mypackage
│   ├── __init__.py
│   └── main.py
├── poetry.lock
├── pyproject.toml
└── tests
    └── __init__.py

4 directories, 8 files

you have a package called “mypackage-0.1.0” created. As ’tar.gz and ‘.whl’ File

How to add a Table to Hugo

Create Table Shortcode

cat <<'EOF'> layouts/shortcodes/table.html    
{{ $htmlTable := .Inner | markdownify }} {{ $class := .Get 0 }} {{ $old := "<table>" }}
{{ $new := printf "<table class=\"%s\">" $class }} {{ $htmlTable :=
  replace $htmlTable $old $new }} {{ $htmlTable | safeHTML }}
</table>
EOF

Build Table

add this to your Markdown File …

| a | b | c |
| - | - | - |
| bli | bla | blu |
| green | blue | red |

Result

Align Left

| a | b | c |
| :- | :- | :- |
| bli | bla | blu |
| green | blue | red |

Result

Align Right

| a | b | c |
| -: | -: | -: |
| bli | bla | blu |
| green | blue | red |

Result

sha256: b0f3682d811304f9d60e0eb42ce92d7f28de15d6dbc0a9c35d1ce7937b442a60