Arseny Zinchenko

DevOps, cloud and infrastructure engineer. Love Linux, OpenSource, and AWS.

Kiev, Ukraine Joined on Sep 16, 2017 https://rtfm.co.ua/en

Arseny Zinchenko

Aug 9

Let's Encrypt: SSL and the "SERVFAIL looking up CAA for domain.com" error

#dns #ssl #security

3 min read

OpenVPN: OpenVPN Access Server set up and AWS VPC peering configuration

Hi, sure. In our setup, all traffic to the Internet will be...

Mar 31 '20

GitHub Actions in Action

It was the very first question in my head during reading abou...

Dec 7 '19

Thank you DEV Community!

For me, the most valuable here was the people, the communit...

Nov 29 '19

Arch Linux: package-query: error while loading shared libraries: libalpm.so.11

Yeah, I have yay just didn't use yet (yaourt was a bit simp...

Nov 6 '19

Arch Linux: NVIDIA driver installation for GeForce GTX 1050 Ti

Hi, Rishi. Sorry for the long reply - didn't notice notific...

Oct 21 '19

Linux: systemd-unit files edit, restart on failure and email notifications

Thanks, @jmon, it's interesting. Although I'm using mailx v...

Aug 22 '19

AWS: CloudCraft – an existing infrastructure’s map generator

Oh, indeed! Thanks, David - just missed to update them afte...

Aug 21 '19

Kubernetes: part 1 – architecture and main components overview

Thanks, David! Glad to hear that :-) As my migration only s...

Jul 26 '19

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Arseny Zinchenko

Jul 29

AWS: Route53 Private Hosted Zones — hiding domains from the Internet

#security #aws #dns

4 min read

Arseny Zinchenko

Jul 22

AWS: WAF WebACL logging and Logz.io integration

#todayilearned #aws #security #tutorial

7 min read

Arseny Zinchenko

Jul 20

AWS: Web Application Firewall overview, configuration, and its monitoring

#security #aws #kubernetes #monitoring

16 min read

Arseny Zinchenko

Jul 16

AWS: CloudTrail overview and integration with CloudWatch and Opsgenie

#todayilearned #aws #devops

7 min read

Arseny Zinchenko

Jul 14

AWS: Simple Email Service Bounce rate and monitoring with and Prometheus

#aws #monitoring

5 min read

Arseny Zinchenko

Jul 13

Kubernetes: Deployment Strategies types, and Argo Rollouts

#todayilearned #kubernetes #devops

11 min read

Arseny Zinchenko

Jul 12

ArgoCD: declarative Projects, Applications, and ArgoCD deploy from Jenkins

#todayilearned #devops #kubernetes #tutorial

11 min read

Arseny Zinchenko

May 18

ArgoCD: Okta integration, and user groups

#security #kubernetes #devops #tutorial

5 min read

Arseny Zinchenko

May 17

ArgoCD: users, access, and RBAC

#todayilearned #devops #kubernetes #tutorial

9 min read

Arseny Zinchenko

May 7

Github: Github Actions overview and ArgoCD deployment example

#todayilearned #devops #github #tutorial

10 min read

Arseny Zinchenko

Apr 29

Istio: shared Ingress/AWS ALB, Helm chart with conditions, Istio, and ExternalDNS

#kubernetes #devops #aws #tutorial

17 min read

Arseny Zinchenko

Apr 25

Istio: external AWS Application LoadBalancer and Istio Ingress Gateway

#tutorial #aws #kubernetes

8 min read

Arseny Zinchenko

Apr 22

AWS: cost optimization — purchasing the RDS Reserved Instances

#todayilearned #aws

7 min read

Arseny Zinchenko

Apr 21

Istio: an overview and running Service Mesh in Kubernetes

#kubernetes #aws #devops

16 min read

Arseny Zinchenko

Mar 18

Kubernetes: what are Endpoints

#todayilearned #kubernetes #networking

5 min read

Arseny Zinchenko

Apr 17

Jenkins: running workers in Kubernetes and Docker images build

#docker #devops #kubernetes

8 min read

Arseny Zinchenko

Apr 18

Kubernetes: NGINX/PHP-FPM graceful shutdown and 502 errors

#todayilearned #kubernetes #webdev #docker

9 min read

Arseny Zinchenko

Apr 16

Yandex.Tank: load testing tool — an overview, configuration, and examples

#testing #tutorial #devops

7 min read

Arseny Zinchenko

Apr 19

Linux: setlocale: LC_ALL: cannot change locale (en_US.utf8) and Cyrillic symbols

#linux #todayileanded

3 min read

Arseny Zinchenko

Feb 25

Logz.io: collection logs from Kubernetes — fluentd vs filebeat

#monitoring #kubernetes

3 min read

Arseny Zinchenko

Feb 16

Prometheus: Alertmanager Web UI alerts Silence

#monitoring #devops

4 min read

Arseny Zinchenko

Feb 12

ArgoCD: a Helm chart deployment, and working with Helm Secrets via AWS KMS

#aws #security #devops #tutorial

13 min read

Arseny Zinchenko

Feb 11

ArgoCD: an overview, SSL configuration, and an application deploy

#git #kubernetes #devops #tutorial

10 min read

Arseny Zinchenko

Feb 2

Kubernetes: ServiceAccounts, JWT-tokens, authentication, and RBAC authorization

#security #kubernetes #todayilerned

8 min read

Arseny Zinchenko

Feb 1

Kubernetes: update AWS Route53 DNS from an Ingress

#dns #kubernetes #aws #devops

8 min read

Arseny Zinchenko

Nov 7 '20

Linux: LEMP set up — NGINX, PHP, MySQL, SSL, monitoring, logs, and a WordPress blog migration

#linux #wordpress #tutorial

29 min read

Arseny Zinchenko

Nov 1 '20

Jenkins: Redis deployment, and Helm subchart values

#kubernetes #tutorial #devops

7 min read

Arseny Zinchenko

Nov 1 '20

Kubernetes: Service, load balancing, kube-proxy, and iptables

#todayilearned #linux #aws #kubernetes

10 min read

Arseny Zinchenko

Oct 27 '20

Kubernetes: running SQL migrations with Kubernetes Job and Helm hook

#kubernetes #tutorial #sql #devops

11 min read

Arseny Zinchenko

Oct 20 '20

Helm: reusable chart — named templates, and a generic chart for multiple applications

#todayilearned #kubernetes #devops #tutorial

17 min read

Arseny Zinchenko

Oct 5 '20

Kubernetes: Evicted pods and pods Quality of Service

#todayilearned #kubernetes #monitoring

5 min read

Arseny Zinchenko

Sep 29 '20

Redis: running Master-Slave replication in Kubernetes

#redis #database #kubernetes #tutorial

8 1

6 min read

Arseny Zinchenko

Sep 4 '20

Kubernetes: load-testing and high-load tuning — problems and solutions

#aws #kubernetes #tutorial #devops

12 1

36 min read

Arseny Zinchenko

Aug 13 '20

Kubernetes: a cluster’s monitoring with the Prometheus Operator

#todayilearned #monitoring #kubernetes #tutorial

8 1

13 min read

Arseny Zinchenko

Aug 12 '20

Kubernetes: HorizontalPodAutoscaler — an overview with examples

#todayilearned #monitoring #kubernetes #tutorial

19 min read

Arseny Zinchenko

Aug 5 '20

Neo4j: running in Kubernetes

#kubernetes #database

3 min read

Arseny Zinchenko

Aug 5 '20

Kubernetes: PersistentVolume and PersistentVolumeClaim — an overview with examples

#todayilearned #aws #kubernetes #tutorial

12 min read

Arseny Zinchenko

Jul 29 '20

Neo4j: graph database — run with Docker and Cypher QL examples

#database #docker #tutorial

7 min read

Arseny Zinchenko

Jul 23 '20

Prometheus: yet-another-cloudwatch-exporter – collecting AWS CloudWatch metrics

#aws #monitoring #tutorial #cloudwatch

6 min read

Arseny Zinchenko

Jun 24 '20

Kubernetes: ClusterIP vs NodePort vs LoadBalancer, Services, and Ingress — an overview with…

#todayilearned #aws #kubernetes #tutorial

11 min read

Arseny Zinchenko

May 17 '20

Docker: configure tzdata and timezone during build

#docker #automation

17 2

2 min read

Arseny Zinchenko

May 18 '20

AWS: CloudFormation - using Conditions, Fn::Equals, and Fn::If - an example

#aws #automation #tutorial

4 min read

Arseny Zinchenko

May 16 '20

Helm: helm-secrets — sensitive data encryption with AWS KMS and use it from Jenkins

#kubernetes #aws #security #tutorial

12 min read

Arseny Zinchenko

May 10 '20

Jira: filters and email notifications about tickets

#todayilearned #agile #productivity

3 min read

Arseny Zinchenko

May 8 '20

AWS: CloudFormation – using lists in Parameters

#aws #devops #automation #tutorial

4 min read

Arseny Zinchenko

May 5 '20

Helm: Kubernetes package manager — an overview, getting started

#todayilearned #kubernetes #tutorial #devops

9 min read

Arseny Zinchenko

May 4 '20

AWS Elastic Kubernetes Service: a cluster creation automation, part 2 — Ansible, eksctl

#kubernetes #aws #devops #tutorial

23 min read

Arseny Zinchenko

Apr 30 '20

Linux: no sound after suspend/sleep – the solution

#troubleshooting #linux

3 min read

Arseny Zinchenko

Apr 26 '20

Kubernetes: monitoring with Prometheus – exporters, a Service Discovery, and its roles

#kubernetes #aws #tutorial #devops

21 min read

Arseny Zinchenko

Apr 24 '20

AWS Elastic Kubernetes Service: a cluster creation automation, part 1 – CloudFormation

#aws #devops #kubernetes #tutorial

22 min read

Arseny Zinchenko

Apr 24 '20

Google Drive: using via terminal on Linux Debian 9 with insync-headless

#linux #google

3 min read

Arseny Zinchenko

Apr 21 '20

AWS Elastic Kubernetes Service: running ALB Ingress controller

#aws #kubernetes #tutorial

9 min read

Arseny Zinchenko

Mar 26 '20

Kubernetes: part 5 — RBAC authorization with a Role and RoleBinding example

#aws #kubernetes #security #tutorial

10 1

8 min read

Arseny Zinchenko

Mar 14 '20

Linux: processes core dumps, systemd-coredump and Debian

#todayilearned #linux #tutorial

8 min read

Arseny Zinchenko

Feb 29 '20

AWS: CloudFormation – Nested Stacks and stacks parameters Import/Export

#todayilearned #aws #tutorial

12 min read

Arseny Zinchenko

Feb 27 '20

Linux: gnome-keyring setup as Freedesktop SecretService

#linux #security

5 min read

Arseny Zinchenko

Feb 26 '20

Redis: “psync scheduled to be closed ASAP for overcoming of output buffer limits” and the client-output-buffer-limit

#database #monitoring #redis

8 1

12 min read

Arseny Zinchenko

Feb 24 '20

Linux: PHP-FPM, Docker, STDOUT and STDERR – no an application’s error logs

#todayilearned #docker #php #linux

9 min read

Arseny Zinchenko

Feb 19 '20

PHP: PHP-FPM ignores environment variables – solutions

#php #troubleshooting #kubernetes

3 min read

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OpenVPN: OpenVPN Access Server set up and AWS VPC peering configuration

GitHub Actions in Action

Thank you DEV Community!

Arch Linux: package-query: error while loading shared libraries: libalpm.so.11

Arch Linux: NVIDIA driver installation for GeForce GTX 1050 Ti

Linux: systemd-unit files edit, restart on failure and email notifications

AWS: CloudCraft – an existing infrastructure’s map generator

Kubernetes: part 1 – architecture and main components overview