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Arseny Zinchenko profile picture

Arseny Zinchenko

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

Location Kiev, Ukraine Joined Joined on  Twitter logo GitHub logo LinkedIn logo External link icon

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

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17 min read

Kubernetes: Evicted pods and pods Quality of Service

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5 min read

Redis: running Master-Slave replication in Kubernetes

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6 min read

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

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36 min read

Kubernetes: a cluster’s monitoring with the Prometheus Operator

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13 min read

Kubernetes: HorizontalPodAutoscaler — an overview with examples

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19 min read

Neo4j: running in Kubernetes

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3 min read

Kubernetes: PersistentVolume and PersistentVolumeClaim — an overview with examples

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12 min read

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

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7 min read

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

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6 min read

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

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11 min read

Docker: configure tzdata and timezone during build

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2 min read

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

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4 min read

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

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12 min read

Jira: filters and email notifications about tickets

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3 min read

AWS: CloudFormation – using lists in Parameters

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4 min read

Helm: Kubernetes package manager — an overview, getting started

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9 min read

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

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23 min read

Linux: no sound after suspend/sleep – the solution

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3 min read

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

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21 min read

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

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22 min read

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

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3 min read

AWS Elastic Kubernetes Service: running ALB Ingress controller

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9 min read

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

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8 min read

Linux: processes core dumps, systemd-coredump and Debian

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8 min read

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

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12 min read

Linux: gnome-keyring setup as Freedesktop SecretService

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5 min read

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

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12 min read

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

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9 min read

PHP: PHP-FPM ignores environment variables – solutions

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3 min read

Kubernetes: running metrics-server in AWS EKS for a Kubernetes Pod AutoScaler

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8 min read

Kubernetes: ConfigMaps and Secrets on a Gorush server example

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6 min read

Kubernetes: ConfigMap and Secrets – data auto-reload in pods

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3 min read

Kubernetes: running a push-server with Gorush behind an AWS LoadBalancer

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5 min read

Calibre Web: home in-browser online-library with Nextcloud storage and Moon+ Reader on Android

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8 min read

Bitwarden: shared MFA TOTP codes for Gmail accounts

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3 min read

KeePass: SSH keys passwords storage and decryption on Linux

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4 min read

KeePass: an MFA TOTP codes, a browser’s passwords, SSH keys passwords storage configuration and Secret Service integration

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14 min read

Chromium: Linux, keyrings && Secret Service, passwords encryption and store

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8 min read

What is: Linux keyring, gnome-keyring, Secret Service, and D-Bus

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22 min read

SSH: RSA keys, and ssh-agent for SSH keys and their passwords management

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10 min read

Linux: the Nextcloud client, qtkeychain and the “The name org.freedesktop.secrets was not provided by any .service files” error

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7 min read

Nextcloud: running in Docker Compose on Debian with Let’s Encrypt SSL

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14 min read

Arch Linux: key could not be imported – required key missing from keyring

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5 min read

HTTP: redirects, POST and GET requests, and the "lost data"

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12 min read

AWS: RDS Certificate Authority SSL certificate upgrade

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4 min read

Linux: Kazam – record a screencast

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2 min read

Grafana: Loki – the LogQL’s Prometheus-like counters, aggregation functions, and dnsmasq’s requests graphs

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15 min read

What is: SAML – an overview, its structure, and requests tracing between a Jenkins and Okta SSO

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16 min read

dnsmasq: AWS – “Temporary failure in name resolution”, logs, debug and dnsmasq cache size

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9 min read

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

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3 min read

Okta: G-Suite integration – provisioning and users import and export

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7 min read

Github: SAML, Okta, and Github Enterprise Cloud – Organization SSO configuration

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5 min read

AWS: Redshift – quick start and SQL-workbench connection configuration

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4 min read

Jenkins: SAML, Okta, user groups, and Role-Based Security plugin

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5 min read

OpenVPN: the No route to host and ERR_ADDRESS_UNREACHABLE errors – the cause and a solution

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3 min read

Jenkins: SAML Authentication with Okta and users groups

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7 min read

Vertica: a simple cluster set up and configuration on AWS EC2

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7 min read

Debian: logrotate won’t rotate logs with an “unknown group ‘syslog'” error

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2 min read

Okta: the Custom domain and TLS configuration

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4 min read
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