2026-02-11 16:24:31 +00:00
31 changed files with 800 additions and 106 deletions
--- a/.spelling
+++ b/.spelling
@@ -74,6 +74,34 @@ themenbereiche
 änderungen
 auszuführen
 zeitraum
+GitOps
+FluxCD
+gitlab
+restic
+vaultwarden
+standort
+höchstleistungen
+Fähigkeiten
+docker
+Golang
+Datenbankverwaltung
+Einführung
+selbstverwalteten
+Entwicklungsteams
+Zugriffsmanagement
+Ausführung
+Deployments
+größeren
+kundenorientierter
+Datenbank-Lifecycle-Managements
+Refactoring
+Ablösung
+CD-Lösung
+Preview-Environments
+Daten-Streaming
+JavaScript
+Zugriffsrechten
+Repositories
 - index.md
 Rodionov
 db-operator
@@ -126,3 +154,16 @@ Blue-Green-RabbitMQ-Deployments
 Kubernetes-Backends
 Faro
 Minio-Bucket
+Open-Source-Kubernetes-Operators
+Deployment-Workflows
+Selenoid-Backends
+db-operator
+Terraform-Codebasis
+Downtime
+Cross-Cloud-Backup-Strategien
+Federated-Prometheus-Cluster
+ - ./english/index.md
+Golang
+selenoid
+golang
+db-operator
--- a/.woodpecker/build.yaml
+++ b/.woodpecker/build.yaml
@@ -20,6 +20,8 @@ steps:
        securityContext:
          privileged: true
    commands:
+      - mkdir -p ~/.local/share/fonts
+      - cp ./fonts/fira_sans/* ~/.local/share/fonts/
      - apt-get update
      - |-
          apt-get install -y libx11-xcb1 libxcomposite1 libasound2 \
--- a/css/nord_dark.css
+++ b/css/nord_dark.css
@@ -0,0 +1,144 @@
+/* ===============================
+   Nord Dark – Compact Markdown
+   github-markdown-css compatible
+   =============================== */
+
+.markdown-body {
+  background: #2E3440;
+  color: #D8DEE9;
+  font-family: "Fira Sans";
+  font-size: 15px;
+  line-height: 1.55;
+  padding-top: 2.0rem;
+  padding-bottom: 1.0rem;
+  padding-right: 3.0rem;
+  padding-left: 3.0rem;
+}
+
+/* Headings */
+.markdown-body h1,
+.markdown-body h2,
+.markdown-body h3,
+.markdown-body h4,
+.markdown-body h5,
+.markdown-body h6 {
+  border: none;
+  margin-top: 1.2em;
+  margin-bottom: 0.4em;
+  font-weight: 700;
+  color: #ECEFF4;
+}
+
+.markdown-body h1 { font-size: 1.9em; }
+.markdown-body h2 { font-size: 1.6em; }
+.markdown-body h3 { font-size: 1.35em; }
+.markdown-body h4 { font-size: 1.15em; }
+.markdown-body h5 { font-size: 1.02em; }
+.markdown-body h6 { font-size: 0.95em; }
+
+/* Paragraphs */
+.markdown-body p {
+  margin: 0.55em 0;
+}
+
+/* Blockquotes – SAME vertical spacing as paragraphs */
+.markdown-body blockquote {
+  margin: 0.55em 0;
+  padding: 0.55em 0.8em;
+  border-left: 3px solid #8FBCBB;
+  background: #3B4252;
+  color: #D8DEE9;
+  font-style: italic;
+}
+
+.markdown-body blockquote > :first-child { margin-top: 0; }
+.markdown-body blockquote > :last-child  { margin-bottom: 0; }
+
+/* Links */
+.markdown-body a {
+  color: #ECEFF4;              /* same as headings → bold-text feel */
+  font-weight: 700;            /* bold */
+  text-decoration: none;
+  border-bottom: 0.5px dotted #88C0D0; /* underline = link signal */
+}
+
+.markdown-body a:hover {
+  color: #8FBCBB;              /* subtle Nord accent on hover */
+  border-bottom-color: #8FBCBB;
+}
+
+/* Code */
+.markdown-body code {
+  background: #3B4252;
+  color: #EBCB8B;
+  padding: 0.1em 0.3em;
+  border-radius: 3px;
+  font-size: 0.92em;
+}
+
+.markdown-body pre {
+  background: #3B4252;
+  color: #ECEFF4;
+  padding: 0.75em 0.9em;
+  border-radius: 5px;
+  overflow-x: auto;
+  border-left: 3px solid #81A1C1;
+  margin: 0.7em 0;
+}
+
+.markdown-body pre code {
+  background: none;
+  padding: 0;
+}
+
+/* Lists */
+.markdown-body ul,
+.markdown-body ol {
+  padding-left: 1.3em;
+  margin: 0.5em 0;
+}
+
+.markdown-body ul li::marker,
+.markdown-body ol li::marker {
+  color: #88C0D0;
+}
+
+/* HR */
+.markdown-body hr {
+  border: none;
+  border-top: 1px dashed #4C566A;
+  margin: 1.2em 0;
+}
+
+/* Tables */
+.markdown-body table {
+  border-collapse: collapse;
+  width: 100%;
+  margin: 0.7em 0;
+  font-size: 0.92em;
+}
+
+.markdown-body th,
+.markdown-body td {
+  border: 1px solid #4C566A;
+  padding: 0.35em 0.6em;
+}
+
+.markdown-body th {
+  background: #3B4252;
+}
+
+/* Images */
+.markdown-body img {
+  max-width: 100%;
+  background: #2E3440;
+  border: 0px solid #4C566A;
+  padding: 0.2em;
+  border-radius: 0px;
+}
+
+/* Hide anchor icons */
+.markdown-body a.anchor {
+  display: none;
+}
+
--- a/css/nord_light.css
+++ b/css/nord_light.css
@@ -0,0 +1,141 @@
+/* ===============================
+   Nord Light – Compact Markdown
+   github-markdown-css compatible
+   =============================== */
+
+.markdown-body {
+  background: #ECEFF4;
+  color: #2E3440;
+  font-family: "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
+  font-size: 15px;
+  line-height: 1.55;
+  padding: 4.0rem;
+}
+
+/* Headings */
+.markdown-body h1,
+.markdown-body h2,
+.markdown-body h3,
+.markdown-body h4,
+.markdown-body h5,
+.markdown-body h6 {
+  border: none;
+  margin-top: 1.2em;
+  margin-bottom: 0.4em;
+  font-weight: 700;
+  color: #3B4252;
+}
+
+.markdown-body h1 { font-size: 1.9em; }
+.markdown-body h2 { font-size: 1.6em; }
+.markdown-body h3 { font-size: 1.35em; }
+.markdown-body h4 { font-size: 1.15em; }
+.markdown-body h5 { font-size: 1.02em; }
+.markdown-body h6 { font-size: 0.95em; color: #4C566A; }
+
+/* Paragraphs */
+.markdown-body p {
+  margin: 0.55em 0;
+}
+
+/* Blockquotes – SAME vertical spacing as paragraphs */
+.markdown-body blockquote {
+  margin: 0.55em 0;
+  padding: 0.55em 0.8em;
+  border-left: 3px solid #81A1C1;
+  background: #E5E9F0;
+  color: #4C566A;
+  font-style: italic;
+}
+
+/* Remove extra spacing inside blockquotes */
+.markdown-body blockquote > :first-child { margin-top: 0; }
+.markdown-body blockquote > :last-child  { margin-bottom: 0; }
+
+/* Links */
+.markdown-body a {
+  color: #5E81AC;
+  text-decoration: none;
+  border-bottom: 1px dotted #81A1C1;
+}
+
+.markdown-body a:hover {
+  color: #81A1C1;
+  border-bottom-style: solid;
+}
+
+/* Code */
+.markdown-body code {
+  background: #E5E9F0;
+  color: #BF616A;
+  padding: 0.1em 0.3em;
+  border-radius: 3px;
+  font-size: 0.92em;
+}
+
+.markdown-body pre {
+  background: #E5E9F0;
+  color: #2E3440;
+  padding: 0.75em 0.9em;
+  border-radius: 5px;
+  overflow-x: auto;
+  border-left: 3px solid #88C0D0;
+  margin: 0.7em 0;
+}
+
+.markdown-body pre code {
+  background: none;
+  padding: 0;
+}
+
+/* Lists */
+.markdown-body ul,
+.markdown-body ol {
+  padding-left: 1.3em;
+  margin: 0.5em 0;
+}
+
+.markdown-body ul li::marker,
+.markdown-body ol li::marker {
+  color: #5E81AC;
+}
+
+/* HR */
+.markdown-body hr {
+  border: none;
+  border-top: 1px dashed #D8DEE9;
+  margin: 1.2em 0;
+}
+
+/* Tables */
+.markdown-body table {
+  border-collapse: collapse;
+  width: 100%;
+  margin: 0.7em 0;
+  font-size: 0.92em;
+}
+
+.markdown-body th,
+.markdown-body td {
+  border: 1px solid #D8DEE9;
+  padding: 0.35em 0.6em;
+}
+
+.markdown-body th {
+  background: #E5E9F0;
+}
+
+/* Images */
+.markdown-body img {
+  max-width: 100%;
+  background: #E5E9F0;
+  border: 1px solid #D8DEE9;
+  padding: 0.2em;
+  border-radius: 3px;
+}
+
+/* Hide anchor icons */
+.markdown-body a.anchor {
+  display: none;
+}
+
--- a/css/solarized_light.css
+++ b/css/solarized_light.css
@@ -0,0 +1,140 @@
+/* ===============================
+   Solarized Light – Compact Markdown
+   github-markdown-css compatible
+   =============================== */
+
+.markdown-body {
+  background: #FDF6E3; /* base3 */
+  color: #657B83;      /* base00 */
+  font-family: "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
+  font-size: 15px;
+  line-height: 1.55;
+  padding: 4.0rem;
+}
+
+/* Headings */
+.markdown-body h1,
+.markdown-body h2,
+.markdown-body h3,
+.markdown-body h4,
+.markdown-body h5,
+.markdown-body h6 {
+  border: none;
+  margin-top: 1.2em;
+  margin-bottom: 0.4em;
+  font-weight: 700;
+  color: #586E75; /* base01 */
+}
+
+.markdown-body h1 { font-size: 1.9em; }
+.markdown-body h2 { font-size: 1.6em; }
+.markdown-body h3 { font-size: 1.35em; }
+.markdown-body h4 { font-size: 1.15em; }
+.markdown-body h5 { font-size: 1.02em; }
+.markdown-body h6 { font-size: 0.95em; color: #839496; /* base0 */ }
+
+/* Paragraphs */
+.markdown-body p {
+  margin: 0.55em 0;
+}
+
+/* Blockquotes – SAME vertical spacing as paragraphs */
+.markdown-body blockquote {
+  margin: 0.55em 0;
+  padding: 0.55em 0.8em;
+  border-left: 3px solid #268BD2; /* blue */
+  background: #EEE8D5;           /* base2 */
+  color: #839496;                /* base0 */
+  font-style: italic;
+}
+
+/* Remove extra spacing inside blockquotes */
+.markdown-body blockquote > :first-child { margin-top: 0; }
+.markdown-body blockquote > :last-child  { margin-bottom: 0; }
+
+/* Links */
+.markdown-body a {
+  color: #268BD2; /* blue */
+  text-decoration: none;
+  border-bottom: 1px dotted #2AA198; /* cyan */
+}
+
+.markdown-body a:hover {
+  color: #2AA198; /* cyan */
+  border-bottom-style: solid;
+}
+
+/* Code */
+.markdown-body code {
+  background: #EEE8D5; /* base2 */
+  color: #DC322F;      /* red */
+  padding: 0.1em 0.3em;
+  border-radius: 3px;
+  font-size: 0.92em;
+}
+
+.markdown-body pre {
+  background: #EEE8D5; /* base2 */
+  color: #586E75;      /* base01 */
+  padding: 0.75em 0.9em;
+  border-radius: 5px;
+  overflow-x: auto;
+  border-left: 3px solid #2AA198; /* cyan */
+  margin: 0.7em 0;
+}
+
+.markdown-body pre code {
+  background: none;
+  padding: 0;
+}
+
+/* Lists */
+.markdown-body ul,
+.markdown-body ol {
+  padding-left: 1.3em;
+  margin: 0.5em 0;
+}
+
+.markdown-body ul li::marker,
+.markdown-body ol li::marker {
+  color: #268BD2; /* blue */
+}
+
+/* HR */
+.markdown-body hr {
+  border: none;
+  border-top: 1px dashed #DDD6C1; /* subtle base2/base1 mix */
+  margin: 1.2em 0;
+}
+
+/* Tables */
+.markdown-body table {
+  border-collapse: collapse;
+  width: 100%;
+  margin: 0.7em 0;
+  font-size: 0.92em;
+}
+
+.markdown-body th,
+.markdown-body td {
+  border: 1px solid #DDD6C1;
+  padding: 0.35em 0.6em;
+}
+
+.markdown-body th {
+  background: #EEE8D5; /* base2 */
+}
+
+/* Images */
+.markdown-body img {
+  max-width: 100%;
+  background: #EEE8D5;
+  border: 1px solid #DDD6C1;
+  padding: 0.2em;
+  border-radius: 3px;
+}
+
+/* Hide anchor icons */
+.markdown-body a.anchor {
+  display: none;
+}
--- a/css/spacing.css
+++ b/css/spacing.css
@@ -0,0 +1,180 @@
+.markdown-body {
+  font-family: "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
+  font-size: 16px;
+  line-height: 1.65;
+  padding: 1.25rem;
+}
+
+/* -------------------------------
+   Headings (no underline)
+   ------------------------------- */
+.markdown-body h1,
+.markdown-body h2,
+.markdown-body h3,
+.markdown-body h4,
+.markdown-body h5,
+.markdown-body h6 {
+  border: none;
+  margin-top: 1.6em;
+  margin-bottom: 0.6em;
+  font-weight: 700;
+}
+
+.markdown-body h1 { font-size: 2em; }
+.markdown-body h2 { font-size: 1.7em; }
+.markdown-body h3 { font-size: 1.4em; }
+.markdown-body h4 { font-size: 1.2em; }
+.markdown-body h5 { font-size: 1.05em; }
+.markdown-body h6 { font-size: 1em; }
+
+/* -------------------------------
+   Text
+   ------------------------------- */
+.markdown-body p {
+  margin: 0.75em 0;
+}
+
+.markdown-body strong {
+  color: #ECEFF4;
+}
+
+.markdown-body em {
+  color: #E5E9F0;
+}
+
+/* -------------------------------
+   Links
+   ------------------------------- */
+.markdown-body a {
+  color: #88C0D0; /* nord8 */
+  text-decoration: none;
+  border-bottom: 1px dotted #81A1C1;
+}
+
+.markdown-body a:hover {
+  color: #8FBCBB; /* nord7 */
+  border-bottom-style: solid;
+}
+
+/* -------------------------------
+   Inline + Block Code
+   ------------------------------- */
+.markdown-body code {
+  background: #3B4252; /* nord1 */
+  color: #EBCB8B;      /* nord13 */
+  padding: 0.15em 0.35em;
+  border-radius: 3px;
+  font-size: 0.95em;
+}
+
+.markdown-body pre {
+  background: #3B4252;
+  color: #ECEFF4;
+  padding: 1em;
+  border-radius: 6px;
+  overflow-x: auto;
+  border-left: 4px solid #81A1C1; /* nord9 */
+}
+
+.markdown-body pre code {
+  background: none;
+  padding: 0;
+  color: inherit;
+}
+
+/* -------------------------------
+   Blockquotes
+   ------------------------------- */
+.markdown-body blockquote {
+  margin: 1em 0;
+  padding: 0.6em 1em;
+  border-left: 4px solid #8FBCBB; /* nord7 */
+  background: #3B4252;
+  color: #D8DEE9;
+  font-style: italic;
+}
+
+/* -------------------------------
+   Lists
+   ------------------------------- */
+.markdown-body ul,
+.markdown-body ol {
+  padding-left: 1.6em;
+  margin: 0.8em 0;
+}
+
+.markdown-body ul li::marker {
+  color: #88C0D0;
+}
+
+.markdown-body ol li::marker {
+  color: #88C0D0;
+  font-weight: bold;
+}
+
+/* -------------------------------
+   Horizontal Rule
+   ------------------------------- */
+.markdown-body hr {
+  border: none;
+  border-top: 1px dashed #4C566A; /* nord3 */
+  margin: 2em 0;
+}
+
+/* -------------------------------
+   Tables
+   ------------------------------- */
+.markdown-body table {
+  border-collapse: collapse;
+  width: 100%;
+  margin: 1em 0;
+  font-size: 0.95em;
+}
+
+.markdown-body th,
+.markdown-body td {
+  border: 1px solid #4C566A;
+  padding: 0.5em 0.75em;
+}
+
+.markdown-body th {
+  background: #3B4252;
+  color: #ECEFF4;
+}
+
+.markdown-body tr:nth-child(even) td {
+  background: #434C5E; /* nord2 */
+}
+
+/* -------------------------------
+   Images
+   ------------------------------- */
+.markdown-body img {
+  max-width: 100%;
+  background: #3B4252;
+  border: 1px solid #4C566A;
+  padding: 0.25em;
+  border-radius: 4px;
+}
+
+/* -------------------------------
+   Anchor links (hide GitHub icons)
+   ------------------------------- */
+.markdown-body a.anchor {
+  display: none;
+}
+
+/* -------------------------------
+   Print / PDF safety
+   ------------------------------- */
+@media print {
+  .markdown-body {
+    background: #ffffff;
+    color: #000000;
+  }
+
+  a {
+    color: #000000;
+    border: none;
+  }
+}
--- a/english/index.md
+++ b/english/index.md
@@ -1,10 +1,12 @@
 ---
 pdf_options:
  format: a4
-  margin: 20mm 10mm
+  margin: 0mm 0mm
  printBackground: true
+trim_trailing_whitespace: false
 stylesheet:
-  - https://cdnjs.cloudflare.com/ajax/libs/github-markdown-css/5.5.1/github-markdown.css
+  - ./css/nord_dark.css
+
 body_class: markdown-body
 css: |-
    .markdown-body { 
@@ -13,54 +15,76 @@ css: |-
    .page-break { page-break-after: always; }
 ---

-## Nikolai Rodionov
+<img src="../resources/photo.png" alt="photo" style="float: left; padding-right: 2em; padding-top: 2em; margin: 0 0 0em 0em; height: 80px;"/>
+<br>

-```
-> Location: Hamburg, Germany
-> Email: allanger@zohomail.com
-> Github: https://github.com/allanger
-```
+## Nikolai Rodionov
+### Senior DevOps Engineer
+
+<br clear="left" />
+
+> **Location:**&nbsp;&nbsp;**Hamburg, Germany**  
+> **Email:**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;allanger@zohomail.com  
+> **Phone:**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**4915223284008**  
+> **GitHub:**&nbsp;&nbsp;&nbsp;&nbsp;https://github.com/allanger  

 ### About me

-I'm a DevOps engineer with almost 10 years of hands-on experience. I've been mostly focused on Kubernetes and CI/CD pipelines, but it doesn't mean that I would like to avoid tasks in other areas.

-A couple of interesting tasks, that I've been working on:
+Senior DevOps Engineer focused on **Kubernetes** and **CI/CD pipelines**. I build and run **scalable systems**, write **Go** and **Rust**, manage **servers** and **databases**, and help developers perform at their best.

- Migration from Datadog to the self-managed monitoring stack (Mimir/Loki/Tempo/Grafana)
- GCP Kafka access management with a self-written k8s operator (<https://github.com/allanger/gcp-kafka-auth-operator>)
- Migration of several MySQL Percona clusters to Kubernetes using the Percona Operator
- Implementation of a downtime-free blue-green deployment for RabbitMQ
- A data streaming automation from ~800 Postgres databases with structural changes via Kafka deployed to Kubernetes
- Implementation of a Kubernetes backend for Selenoid for running e2e tests in k8s environments
+In addition, I'm a maintainer of an open-source **Kubernetes operator** designed to help users manage databases through CRDs:  
+<https://github.com/db-operator/db-operator>

-Also, I'm a maintainer of a Kubernetes operator that should help users manage databases via CRDs: <https://github.com/db-operator/db-operator>
+
+---
+
+### Skills
+
+**Linux** - **Docker** - **Kubernetes** - **CI/CD** - **Automations and Scripting** - **Bash/Golang/Rust** - **GitOps**  
+**Database Administration** - **Observability and Monitoring** - **Terraform/OpenTofu/Ansible** - **AWS/GCP/Azure** 
+
+---

 ### Experience

-| Company          | Position          | Dates               |
-|------------------|-------------------|---------------------|
-| **Onpier**       | DevOps Engineer   | 06.2024 - Until Now |
-| **Giant Swarm**  | Platform Engineer | 12.2023 - 05.2024   |
-| **Grandcentrix** | SRE               | 02.2023 - 11.2023   |
-| **Klöckner.I**   | DevOps Engineer   | 01.2022 - 01.2023   |
-| **Itigris**      | DevOps Engineer   | 07.2019 - 12.2021   |
-| **Etersoft**     | DevOps Engineer   | 03.2017 - 06.2019   |
+#### Onpier - DevOps Engineer [06.2024 - Until now]
+  - Bootstrapped deployment workflows and CI/CD pipelines for the monitoring stack using **helmfile** and **Github Actions**
+  - Configured and maintained a self-managed observability stack (**Mimir**/**Loki**/**Tempo**/**Grafana Alloy**/**Grafana**)
+  - Operated and supported **Tekton CD** and **ArgoCD** instances for developers
+  - Built and maintained [an open-source Kubernetes operator](https://github.com/ONPIER-OSS/gcp-kafka-auth-operator) for access management in **GCP Kafka**
+  - Implemented a custom [selenoid backend](https://github.com/ONPIER-OSS/selenoid) to run **e2e-tests** natively in **Kubernetes**

-### Tools
+#### Giant Swarm - Platform Engineer [12.2023 - 05.2024]
+  - Deployed and actively used **FluxCD** for GitOps-based workflows
+  - Maintained a large set of customer-facing **Helm charts**
+  - Contributed to and maintained multiple **Go** and **Rust** project

- **Environments**: Linux - Containers - Kubernetes - Proxmox
- **Kubernetes**: Helm - Kustomize - Kubebuilder - Helmfile
- **Scripting/Coding**: Bash - Go - Rust - Perl - Python
- **Continuous Integration**: Gitlab-CI - Github Actions - Circle-CI - Woodpecker-CI - Drone-CI
- **Continuous Delivery**: ArgoCD - Flux - Tekton
- **Infrastructure as Code**: Ansible - Terraform - Opentofu - Cluster API
- **Cloud Providers**: Microsoft Azure - Google Cloud - AWS - Yandex Cloud - Hetzner
- **Observability**: Prometheus - Mimir - Grafana - Loki - Elasticsearch - Kibana - FluentBit - Promtail - Fluentd - Grafana Alloy - Faro - Tempo
- **Secret Management**: Sops - Age - Helm Secrets - Hashicorp Vault
- **Databases**: PostgreSQL - MySQL - Percona MySQL - Redis - Mongo - Dragonfly
- **Storages**: Minio - Ceph - Longhorn
- **Others**: Kafka - RabbitMQ - Selenium - Selenoid - Kyverno - K3s - Kubeadm 
+#### Grandcentrix - SRE [02.2023 - 11.2023]
+  - Streamlined database management using the [db-operator](https://github.com/db-operator/db-operator)
+  - Configured, maintained, and actively used **ArgoCD**
+  - Refactored a large **Terraform** codebase with zero downtime
+
+#### Klöckner.I - DevOps Engineer [01.2022 - 01.2022]
+  - Migrated multiple **Percona MySQL** clusters to **Kubernetes** using **Percona Operator**
+  - Replaced a custom CD solution with **ArgoCD**
+  - Managed **GitLab** and **GitLab CI/CD** installations
+  - Implemented a cross-cloud backup solution using **Restic**
+  - Operated **Elasticsearch**, **Kibana**, and **FluentBit**
+  - Maintained federated **Prometheus** clusters across **Kubernetes** and **Linux Servers**
+  - Deployed and maintained **Vaultwarden** for company-wide secret management
+  - Maintained and contributed to **db-operator**
+
+#### Itigris - DevOps Engineer  [07.2019 - 12.2021]
+  - Built **preview environments** using **ArgoCD**
+  - Implemented data streaming from **~800 PostgreSQL databases** using **Kafka** running in **Kubernetes**
+  - Designed and rolled out company-wide **Gitlab-CI/CD** pipelines for **Java** and **JavaScript** projects
+  - Developed a [cli tool](https://github.com/allanger/gitlab-user-manager) to manage access to **Gitlab** repositories 
+  - Designed, implemented, and maintained **CI** pipelines for **e2e-tests**. 
+
+#### Etersoft - DevOps Engineer [03.2017 - 06.2019]
+  - Designed, implemented, and maintained **CI** pipelines for **e2e-tests**. 
+  - Maintained **Linux Servers**

 ---

--- a/fonts/fira_sans/FiraSans-Black.ttf
+++ b/fonts/fira_sans/FiraSans-Black.ttf
--- a/fonts/fira_sans/FiraSans-BlackItalic.ttf
+++ b/fonts/fira_sans/FiraSans-BlackItalic.ttf
--- a/fonts/fira_sans/FiraSans-Bold.ttf
+++ b/fonts/fira_sans/FiraSans-Bold.ttf
--- a/fonts/fira_sans/FiraSans-BoldItalic.ttf
+++ b/fonts/fira_sans/FiraSans-BoldItalic.ttf
--- a/fonts/fira_sans/FiraSans-ExtraBold.ttf
+++ b/fonts/fira_sans/FiraSans-ExtraBold.ttf
--- a/fonts/fira_sans/FiraSans-ExtraBoldItalic.ttf
+++ b/fonts/fira_sans/FiraSans-ExtraBoldItalic.ttf
--- a/fonts/fira_sans/FiraSans-ExtraLight.ttf
+++ b/fonts/fira_sans/FiraSans-ExtraLight.ttf
--- a/fonts/fira_sans/FiraSans-ExtraLightItalic.ttf
+++ b/fonts/fira_sans/FiraSans-ExtraLightItalic.ttf
--- a/fonts/fira_sans/FiraSans-Italic.ttf
+++ b/fonts/fira_sans/FiraSans-Italic.ttf
--- a/fonts/fira_sans/FiraSans-Light.ttf
+++ b/fonts/fira_sans/FiraSans-Light.ttf
--- a/fonts/fira_sans/FiraSans-LightItalic.ttf
+++ b/fonts/fira_sans/FiraSans-LightItalic.ttf
--- a/fonts/fira_sans/FiraSans-Medium.ttf
+++ b/fonts/fira_sans/FiraSans-Medium.ttf
--- a/fonts/fira_sans/FiraSans-MediumItalic.ttf
+++ b/fonts/fira_sans/FiraSans-MediumItalic.ttf
--- a/fonts/fira_sans/FiraSans-Regular.ttf
+++ b/fonts/fira_sans/FiraSans-Regular.ttf
--- a/fonts/fira_sans/FiraSans-SemiBold.ttf
+++ b/fonts/fira_sans/FiraSans-SemiBold.ttf
--- a/fonts/fira_sans/FiraSans-SemiBoldItalic.ttf
+++ b/fonts/fira_sans/FiraSans-SemiBoldItalic.ttf
--- a/fonts/fira_sans/FiraSans-Thin.ttf
+++ b/fonts/fira_sans/FiraSans-Thin.ttf
--- a/fonts/fira_sans/FiraSans-ThinItalic.ttf
+++ b/fonts/fira_sans/FiraSans-ThinItalic.ttf
--- a/german/index.md
+++ b/german/index.md
@@ -1,10 +1,12 @@
 ---
 pdf_options:
  format: a4
-  margin: 20mm 10mm
+  margin: 0mm 0mm
  printBackground: true
+trim_trailing_whitespace: false
 stylesheet:
-  - https://cdnjs.cloudflare.com/ajax/libs/github-markdown-css/5.5.1/github-markdown.css
+  - ./css/nord_dark.css
+
 body_class: markdown-body
 css: |-
    .markdown-body { 
@@ -13,54 +15,74 @@ css: |-
    .page-break { page-break-after: always; }
 ---

-## Nikolai Rodionov
+<img src="../resources/photo.png" alt="photo" style="float: left; padding-right: 2em; padding-top: 2em; margin: 0 0 0em 0em; height: 80px;"/>
+<br>

-```
-> Standort: Hamburg, Deutschland
-> E-mail: allanger@zohomail.com
-> Github: https://github.com/allanger
-```
+## Nikolai Rodionov
+### Senior DevOps Ingenieur
+
+<br clear="left" />
+
+> **Standort:**&nbsp;&nbsp;Hamburg, Deutschland  
+> **E-mail:**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;allanger@zohomail.com  
+> **Telefon:**&nbsp;&nbsp;&nbsp;4915223284008  
+> **GitHub:**&nbsp;&nbsp;&nbsp;&nbsp;https://github.com/allanger  

 ### Über mich

-Ich bin ein DevOps-Ingenieur mit fast 10 Jahren praktischer Erfahrung und einer breiten Palette an Tools. Mein Fokus lag hauptsächlich auf Kubernetes und CI/CD-Pipelines, das bedeutet jedoch nicht, dass ich andere Themenbereiche meide. 
+Senior-DevOps-Ingenieur konzentrierte sich auf **Kubernetes** und **CI/CD Pipelines**. Ich baue und betreibe **skalierbare Systeme**, schreibe **Go** und **Rust**, verwalte **Servern** und **Datenbanken**, und helfe Entwicklern, Höchstleistungen zu erbringen. 

-Ein paar interessante Aufgaben, an denen ich gearbeitet habe:
+Außerdem bin ich ein Maintainer eines **Open-Source-Kubernetes-Operators**, der Benutzern bei der Verwaltung von Datenbanken über CRDs helfen soll:
+<https://github.com/db-operator/db-operator>

- Migration von Datadog zu einem self-managed Monitoring-Stack (Mimir/Loki/Tempo/Grafana)
- GCP-Kafka-Zugriffsverwaltung mit einem selbstgeschriebenen k8s Operator (<https://github.com/allanger/gcp-kafka-auth-operator>)
- Migration mehrerer MySQL Percona-Cluster zu Kubernetes mithilfe des Percona-Operators
- Implementierung eines downtime-freien Blue-Green-RabbitMQ-Deployments
- Automatisierung des Data-Streamings von ~800 PostgreSQL-Datenbanken inklusive struktureller Änderungen via Kafka in Kubernetes
- Implementierung eines Kubernetes-Backends für Selenoid, um E2E-Tests nativ in Kubernetes auszuführen
+---

-Außerdem bin ich Maintainer eines Kubernetes-Operators, der die Verwaltung von Datenbanken über CRDs vereinfacht: <https://github.com/db-operator/db-operator>
+### Fähigkeiten
+
+**Linux** - **Docker** - **Kubernetes** - **CI/CD** - **Automatisierung und Skripting** - **Bash/Golang/Rust** - **GitOps**  
+**Datenbankverwaltung** - **Observability und Monitoring** - **Terraform/OpenTofu/Ansible** - **AWS/GCP/Azure** 
+
+---

 ### Erfahrung

-| Firma            | Position            | Zeitraum            |
-|------------------|---------------------|---------------------|
-| **Onpier**       | DevOps Ingenieur    | 06.2024 - Bis jetzt |
-| **Giant Swarm**  | Plattform Ingenieur | 12.2023 - 05.2024   |
-| **Grandcentrix** | SRE                 | 02.2023 - 11.2023   |
-| **Klöckner.I**   | DevOps Ingenieur    | 01.2022 - 01.2023   |
-| **Itigris**      | DevOps Ingenieur    | 07.2019 - 12.2021   |
-| **Etersoft**     | DevOps Ingenieur    | 03.2017 - 06.2019   |
+#### Onpier - DevOps-Ingenieur [06.2024 - bis jetzt]
+  - Aufbau und Einführung von Deployment-Workflows und CI/CD-Pipelines für einen Monitoring-Stack mit **helmfile** und **GitHub Actions**
+  - Konfiguration und Betrieb eines selbstverwalteten Observability-Stacks (**Mimir**, **Loki**, **Tempo**, **Grafana Alloy**, **Grafana**)
+  - Betrieb und Support von **Tekton CD-** und **ArgoCD-**Instanzen für Entwicklungsteams
+  - Entwicklung und Wartung eines [Open-Source-Kubernetes-Operators](https://github.com/ONPIER-OSS/gcp-kafka-auth-operator) für Zugriffsmanagement in **GCP Kafka**
+  - Implementierung eines eigenen [Selenoid-Backends](https://github.com/ONPIER-OSS/selenoid) zur nativen Ausführung von **E2E-Tests** in **Kubernetes**

-### Tools
+#### Giant Swarm - Plattform-Ingenieur [12.2023 - 05.2024]
+  - Einführung und aktive Nutzung von **FluxCD** für **GitOps** Deployments 
+  - Wartung einer größeren Anzahl kundenorientierter **Helm Charts**
+  - Mitarbeit an sowie Wartung mehrerer **Go-** und **Rust-**Projekte

- **Umgebungen**: Linux - Containers - Kubernetes - Proxmox
- **Kubernetes**: Helm - Kustomize - Kubebuilder - Helmfile
- **Skripting/Programmierung**: Bash - Go - Rust - Perl - Python
- **Continuous Integration**: Gitlab-CI - Github Actions - Circle-CI - Woodpecker-CI - Drone-CI
- **Continuous Delivery**: ArgoCD - Flux - Tekton
- **IaC**: Ansible - Terraform - Opentofu - Cluster API
- **Cloud Providers**: Microsoft Azure - Google Cloud - AWS - Yandex Cloud - Hetzner
- **Observability**: Prometheus - Mimir - Grafana - Loki - Elasticsearch - Kibana - FluentBit - Promtail - Fluentd - Grafana Alloy - Faro - Tempo
- **Secret-Management**: Sops - Age - Helm Secrets - Hashicorp Vault
- **Datenbanken**: PostgreSQL - MySQL - Percona MySQL - Redis - Mongo - Dragonfly
- **Storages**: Minio - Ceph - Longhorn
- **Sonstiges**: Kafka - RabbitMQ - Selenium - Selenoid - Kyverno - K3s - Kubeadm
+#### Grandcentrix - SRE [02.2023 - 11.2023]
+  - Optimierung des Datenbank-Lifecycle-Managements mit dem [db-operator](https://github.com/db-operator/db-operator)
+  - Konfiguration, Wartung und aktive Nutzung von **ArgoCD**
+  - Refactoring einer umfangreichen Terraform-Codebasis ohne Downtime
+
+#### Klöckner.I - DevOps-Ingenieur [01.2022 - 01.2022]
+  - Migration mehrerer **Percona MySQL-Cluster** nach **Kubernetes** mithilfe des **Percona Operators**
+  - Ablösung einer selbst entwickelten CD-Lösung durch **ArgoCD**
+  - Betrieb und Wartung von **GitLab** und **GitLab CI/CD**
+  - Implementierung von Cross-Cloud-Backup-Strategien mit **Restic**
+  - Betrieb von **Elasticsearch**, **Kibana**, und **FluentBit**
+  - Wartung **Federated-Prometheus-Cluster** auf **Kubernetes** und **Linux-Servern**
+  - Einführung und Betrieb von **Vaultwarden** für unternehmensweites Secret-Management
+  - Wartung **db-operator**
+
+#### Itigris - DevOps-Ingenieur  [07.2019 - 12.2021]
+  - Aufbau **Preview-Environments** mithilfe **ArgoCD**
+  - Umsetzung von Daten-Streaming aus ca. **800 PostgreSQL-Datenbanken** in einen auf **Kubernetes** betriebenen **Kafka-Cluster**
+  - Konzeption und Einführung unternehmensweiter **GitLab CI/CD-Pipelines** für **Java-** und **JavaScript-**Projekte
+  - Entwicklung eines [Cli-Tools](https://github.com/allanger/gitlab-user-manager) zur Verwaltung von Zugriffsrechten auf **GitLab**-Repositories 
+  - Konzeption, Implementierung und Betrieb von **CI-Pipelines** für **E2E-Tests**
+
+#### Etersoft - DevOps-Ingenieur [03.2017 - 06.2019]
+  - Konzeption, Implementierung und Betrieb von **CI-Pipelines** für **E2E-Tests**
+  - Betrieb und Wartung von **Linux-Servern**

 ---

--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,7 @@
      "license": "ISC",
      "dependencies": {
        "markdown-spellcheck": "^1.3.1",
-        "md-to-pdf": "^5.2.4"
+        "md-to-pdf": "^5.2.5"
      }
    },
    "node_modules/@babel/code-frame": {
@@ -37,9 +37,9 @@
      }
    },
    "node_modules/@puppeteer/browsers": {
-      "version": "2.11.2",
-      "resolved": "https://registry.npmjs.org/@puppeteer/browsers/-/browsers-2.11.2.tgz",
-      "integrity": "sha512-GBY0+2lI9fDrjgb5dFL9+enKXqyOPok9PXg/69NVkjW3bikbK9RQrNrI3qccQXmDNN7ln4j/yL89Qgvj/tfqrw==",
+      "version": "2.12.0",
+      "resolved": "https://registry.npmjs.org/@puppeteer/browsers/-/browsers-2.12.0.tgz",
+      "integrity": "sha512-Xuq42yxcQJ54ti8ZHNzF5snFvtpgXzNToJ1bXUGQRaiO8t+B6UM8sTUJfvV+AJnqtkJU/7hdy6nbKyA12aHtRw==",
      "license": "Apache-2.0",
      "dependencies": {
        "debug": "^4.4.3",
@@ -84,9 +84,9 @@
      "license": "MIT"
    },
    "node_modules/@types/node": {
-      "version": "25.2.0",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-25.2.0.tgz",
-      "integrity": "sha512-DZ8VwRFUNzuqJ5khrvwMXHmvPe+zGayJhr2CDNiKB1WBE1ST8Djl00D0IC4vvNmHMdj6DlbYRIaFE7WHjlDl5w==",
+      "version": "25.2.3",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-25.2.3.tgz",
+      "integrity": "sha512-m0jEgYlYz+mDJZ2+F4v8D1AyQb+QzsNqRuI7xg1VQX/KlKS0qT9r1Mo16yo5F/MtifXFgaofIFsdFMox2SxIbQ==",
      "license": "MIT",
      "optional": true,
      "dependencies": {
@@ -513,9 +513,9 @@
      }
    },
    "node_modules/chromium-bidi": {
-      "version": "13.0.1",
-      "resolved": "https://registry.npmjs.org/chromium-bidi/-/chromium-bidi-13.0.1.tgz",
-      "integrity": "sha512-c+RLxH0Vg2x2syS9wPw378oJgiJNXtYXUvnVAldUlt5uaHekn0CCU7gPksNgHjrH1qFhmjVXQj4esvuthuC7OQ==",
+      "version": "13.1.1",
+      "resolved": "https://registry.npmjs.org/chromium-bidi/-/chromium-bidi-13.1.1.tgz",
+      "integrity": "sha512-zB9MpoPd7VJwjowQqiW3FKOvQwffFMjQ8Iejp5ZW+sJaKLRhZX1sTxzl3Zt22TDB4zP0OOqs8lRoY7eAW5geyQ==",
      "license": "Apache-2.0",
      "dependencies": {
        "mitt": "^3.0.1",
@@ -852,9 +852,9 @@
      }
    },
    "node_modules/devtools-protocol": {
-      "version": "0.0.1551306",
-      "resolved": "https://registry.npmjs.org/devtools-protocol/-/devtools-protocol-0.0.1551306.tgz",
-      "integrity": "sha512-CFx8QdSim8iIv+2ZcEOclBKTQY6BI1IEDa7Tm9YkwAXzEWFndTEzpTo5jAUhSnq24IC7xaDw0wvGcm96+Y3PEg==",
+      "version": "0.0.1566079",
+      "resolved": "https://registry.npmjs.org/devtools-protocol/-/devtools-protocol-0.0.1566079.tgz",
+      "integrity": "sha512-MJfAEA1UfVhSs7fbSQOG4czavUp1ajfg6prlAN0+cmfa2zNjaIbvq8VneP7do1WAQQIvgNJWSMeP6UyI90gIlQ==",
      "license": "BSD-3-Clause"
    },
    "node_modules/dunder-proto": {
@@ -2644,17 +2644,17 @@
      }
    },
    "node_modules/puppeteer": {
-      "version": "24.36.1",
-      "resolved": "https://registry.npmjs.org/puppeteer/-/puppeteer-24.36.1.tgz",
-      "integrity": "sha512-uPiDUyf7gd7Il1KnqfNUtHqntL0w1LapEw5Zsuh8oCK8GsqdxySX1PzdIHKB2Dw273gWY4MW0zC5gy3Re9XlqQ==",
+      "version": "24.37.2",
+      "resolved": "https://registry.npmjs.org/puppeteer/-/puppeteer-24.37.2.tgz",
+      "integrity": "sha512-FV1W/919ve0y0oiS/3Rp5XY4MUNUokpZOH/5M4MMDfrrvh6T9VbdKvAHrAFHBuCxvluDxhjra20W7Iz6HJUcIQ==",
      "hasInstallScript": true,
      "license": "Apache-2.0",
      "dependencies": {
-        "@puppeteer/browsers": "2.11.2",
-        "chromium-bidi": "13.0.1",
+        "@puppeteer/browsers": "2.12.0",
+        "chromium-bidi": "13.1.1",
        "cosmiconfig": "^9.0.0",
-        "devtools-protocol": "0.0.1551306",
-        "puppeteer-core": "24.36.1",
+        "devtools-protocol": "0.0.1566079",
+        "puppeteer-core": "24.37.2",
        "typed-query-selector": "^2.12.0"
      },
      "bin": {
@@ -2665,15 +2665,15 @@
      }
    },
    "node_modules/puppeteer-core": {
-      "version": "24.36.1",
-      "resolved": "https://registry.npmjs.org/puppeteer-core/-/puppeteer-core-24.36.1.tgz",
-      "integrity": "sha512-L7ykMWc3lQf3HS7ME3PSjp7wMIjJeW6+bKfH/RSTz5l6VUDGubnrC2BKj3UvM28Y5PMDFW0xniJOZHBZPpW1dQ==",
+      "version": "24.37.2",
+      "resolved": "https://registry.npmjs.org/puppeteer-core/-/puppeteer-core-24.37.2.tgz",
+      "integrity": "sha512-nN8qwE3TGF2vA/+xemPxbesntTuqD9vCGOiZL2uh8HES3pPzLX20MyQjB42dH2rhQ3W3TljZ4ZaKZ0yX/abQuw==",
      "license": "Apache-2.0",
      "dependencies": {
-        "@puppeteer/browsers": "2.11.2",
-        "chromium-bidi": "13.0.1",
+        "@puppeteer/browsers": "2.12.0",
+        "chromium-bidi": "13.1.1",
        "debug": "^4.4.3",
-        "devtools-protocol": "0.0.1551306",
+        "devtools-protocol": "0.0.1566079",
        "typed-query-selector": "^2.12.0",
        "webdriver-bidi-protocol": "0.4.0",
        "ws": "^8.19.0"
@@ -2833,9 +2833,9 @@
      }
    },
    "node_modules/semver": {
-      "version": "7.7.3",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-7.7.3.tgz",
-      "integrity": "sha512-SdsKMrI9TdgjdweUSR9MweHA4EJ8YxHn8DFaDisvhVlUOe4BF1tLD7GAj0lIqWVl+dPb/rExr0Btby5loQm20Q==",
+      "version": "7.7.4",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.7.4.tgz",
+      "integrity": "sha512-vFKC2IEtQnVhpT78h1Yp8wzwrf8CM+MzKMHGJZfBtzhZNycRFnXsHk6E5TxIkkMsgNS7mdX3AGB7x2QM2di4lA==",
      "license": "ISC",
      "bin": {
        "semver": "bin/semver.js"
--- a/package.json
+++ b/package.json
@@ -15,6 +15,6 @@
  "license": "ISC",
  "dependencies": {
    "markdown-spellcheck": "^1.3.1",
-    "md-to-pdf": "^5.2.4"
+    "md-to-pdf": "^5.2.5"
  }
 }
--- a/resources/photo.jpeg
+++ b/resources/photo.jpeg
--- a/resources/photo.jpg
+++ b/resources/photo.jpg
--- a/resources/photo.png
+++ b/resources/photo.png