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Oleksandr Kuryzhev

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Location Ukraine Joined Joined on  Personal website https://kuryzhev.cloud

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DevOps engineer

Terraform Modules for AWS VPC, IAM, and S3: Structure That Scales
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Terraform Modules for AWS VPC, IAM, and S3: Structure That Scales

#aws #terraform #devops
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7 min read

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Bash backup script not running from cron: S3 sync fixes
oleksandr_kuryzhev_42873f profile

Bash backup script not running from cron: S3 sync fixes

#aws #devops
Comments
8 min read
CI/CD Quality Gate Mistakes: Approvals and Rollback Pitfalls
oleksandr_kuryzhev_42873f profile

CI/CD Quality Gate Mistakes: Approvals and Rollback Pitfalls

#cicd #devops
Comments
7 min read
DataSync EventBridge Automation Checklist for S3 Transfers
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DataSync EventBridge Automation Checklist for S3 Transfers

#aws #devops
Comments
7 min read
Cloudflare Tunnel Shows 502 or Inactive? Troubleshooting Fixes
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Cloudflare Tunnel Shows 502 or Inactive? Troubleshooting Fixes

#devops
Comments
8 min read
Cisco Config Backups with Ansible: ios_config vs ios_command
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Cisco Config Backups with Ansible: ios_config vs ios_command

#devops
Comments
6 min read
pgvector Semantic Search in PostgreSQL: A Python Checklist
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pgvector Semantic Search in PostgreSQL: A Python Checklist

#python #devops
Comments
7 min read
Docker Healthchecks: Faster Deploys With Minimal Downtime
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Docker Healthchecks: Faster Deploys With Minimal Downtime

#docker #devops
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6 min read
GitOps with Gitpod vs Local Dev Containers: Which to Pick
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GitOps with Gitpod vs Local Dev Containers: Which to Pick

#devops
1
Comments
8 min read
Build an Interactive Bash CLI for DevOps Reports
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Build an Interactive Bash CLI for DevOps Reports

#devops
Comments
8 min read
GitHub Actions OIDC to AWS: dropping long-lived access keys
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GitHub Actions OIDC to AWS: dropping long-lived access keys

#aws #cicd #devops
Comments 1
7 min read
OIDC federation and what it actually does for CI on AWS
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OIDC federation and what it actually does for CI on AWS

#aws #devops
Comments
7 min read
Why an LLM reviewer misses risky Terraform plan changes
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Why an LLM reviewer misses risky Terraform plan changes

#terraform #devops
Comments
6 min read
An unbounded Loki label turned a logging bill into shock
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An unbounded Loki label turned a logging bill into shock

#devops
Comments
7 min read
When Cloudflare Rate Limit Locks Out Your Own Players
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When Cloudflare Rate Limit Locks Out Your Own Players

#devops
Comments
9 min read
SLO burn-rate alerts explained through a traffic spike
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SLO burn-rate alerts explained through a traffic spike

#devops
Comments
7 min read
IRSA explained: how EKS pods borrow AWS permissions
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IRSA explained: how EKS pods borrow AWS permissions

#aws #devops
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7 min read
BGP routing basics for engineers tired of traffic drops
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BGP routing basics for engineers tired of traffic drops

#devops
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7 min read
WordPress performance profiling with php-fpm status and slow logs
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WordPress performance profiling with php-fpm status and slow logs

#devops
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7 min read
Cloudflare cache bypass mistakes on dynamic WordPress paths
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Cloudflare cache bypass mistakes on dynamic WordPress paths

#devops
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7 min read
Alertmanager Routing Fixes to Cut Prometheus Alert Fatigue
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Alertmanager Routing Fixes to Cut Prometheus Alert Fatigue

#monitoring #devops
Comments 1
7 min read
Terraform Drift Detection in CI: Building a Remediation Pipeline
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Terraform Drift Detection in CI: Building a Remediation Pipeline

#terraform #cicd #devops
Comments 1
10 min read
nginx-proxy acme-companion: why certs never get issued
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nginx-proxy acme-companion: why certs never get issued

#devops
Comments
9 min read
Nginx TLS Hardening: Manual Directives vs Delegated Edge Policy
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Nginx TLS Hardening: Manual Directives vs Delegated Edge Policy

#devops
Comments 1
9 min read
Kubernetes Probe Misconfigurations Behind Restart Storms
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Kubernetes Probe Misconfigurations Behind Restart Storms

#kubernetes #devops
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9 min read
3 Mistakes That Break Docker Container Alerting Rules
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3 Mistakes That Break Docker Container Alerting Rules

#docker #devops
Comments
8 min read
Postgres Backup CronJob on Kubernetes: Setup and Restore Testing
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Postgres Backup CronJob on Kubernetes: Setup and Restore Testing

#kubernetes #devops
Comments
4 min read
Lambda DLQ Setup: 7 Fixes to Stop Losing Failed Messages
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Lambda DLQ Setup: 7 Fixes to Stop Losing Failed Messages

#aws #devops
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7 min read
Fix Silent Makefile Target Failures in Infra Repos
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Fix Silent Makefile Target Failures in Infra Repos

#devops
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7 min read
Kubectl Alias Pitfalls You Should Fix Before They Bite
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Kubectl Alias Pitfalls You Should Fix Before They Bite

#devops
Comments
8 min read
Bedrock IAM Least Privilege: Stopping Runaway Bot Costs
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Bedrock IAM Least Privilege: Stopping Runaway Bot Costs

#aws #devops
Comments
7 min read
3 boto3 and argparse Mistakes That Break Python AWS Scripts
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3 boto3 and argparse Mistakes That Break Python AWS Scripts

#aws #python #devops
Comments
7 min read
How We Learned to Harden Jenkins Agents: 3 Mistakes That Cost Us
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How We Learned to Harden Jenkins Agents: 3 Mistakes That Cost Us

#cicd #devops
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7 min read
Rolling Out Kubernetes Pod Security Standards Without Breaking Prod
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Rolling Out Kubernetes Pod Security Standards Without Breaking Prod

#kubernetes #security #devops
1
Comments
7 min read
WireGuard Key Rotation: Static Configs vs Control-Plane Mesh
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WireGuard Key Rotation: Static Configs vs Control-Plane Mesh

#devops
1
Comments
7 min read
Fix Nginx Cache-Control Misconfig Serving Stale or Uncached Assets
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Fix Nginx Cache-Control Misconfig Serving Stale or Uncached Assets

#devops
Comments
8 min read
PostgreSQL VACUUM Monitoring: Catch Bloat Before It Causes Downtime
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PostgreSQL VACUUM Monitoring: Catch Bloat Before It Causes Downtime

#monitoring #devops
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8 min read
7 Fixes for Python Lambda Cold Start Latency in 2026
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7 Fixes for Python Lambda Cold Start Latency in 2026

#aws #python #devops
1
Comments
6 min read
Setting Up Jenkins AWS OIDC Authentication to Replace Static Keys
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Setting Up Jenkins AWS OIDC Authentication to Replace Static Keys

#aws #cicd #devops
1
Comments
6 min read
Loki Retention Tuning: 7 Fixes for Runaway Log Storage Costs
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Loki Retention Tuning: 7 Fixes for Runaway Log Storage Costs

#devops
1
Comments
5 min read
Argo CD Canary Deployment: Gating Rollouts with Real SLIs
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Argo CD Canary Deployment: Gating Rollouts with Real SLIs

#devops
1
Comments
7 min read
Terraform Workspaces vs Separate Backends for Multi-Env AWS
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Terraform Workspaces vs Separate Backends for Multi-Env AWS

#aws #terraform #devops
1
Comments
6 min read
kubectl Ran on the Wrong Cluster? Fix Your Context Switching
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kubectl Ran on the Wrong Cluster? Fix Your Context Switching

#devops
1
Comments
7 min read
Fix Lambda S3 Trigger Error Handling Before It Loses Events
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Fix Lambda S3 Trigger Error Handling Before It Loses Events

#aws #devops
1
Comments
7 min read
Fixing Loki Regex Pipeline Stage Failures on Nginx Logs
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Fixing Loki Regex Pipeline Stage Failures on Nginx Logs

#cicd #devops
1
Comments
7 min read
ArgoCD Game Server Deployment: 7 Tips for Agones Fleets
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ArgoCD Game Server Deployment: 7 Tips for Agones Fleets

#devops
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6 min read
Isolation Forest vs GPT-4o for AI Log Anomaly Detection
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Isolation Forest vs GPT-4o for AI Log Anomaly Detection

#devops
1
Comments
7 min read
Terraform Compliance Scanning in GitLab CI: 3 Mistakes We Made
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Terraform Compliance Scanning in GitLab CI: 3 Mistakes We Made

#terraform #cicd #devops
1
Comments
7 min read
Machine Learning Log Anomaly Detection with Grafana Loki
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Machine Learning Log Anomaly Detection with Grafana Loki

#monitoring #devops
1
Comments
8 min read
Kubernetes NetworkPolicy Checklist: Locking Down Namespace Isolation
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Kubernetes NetworkPolicy Checklist: Locking Down Namespace Isolation

#kubernetes #devops
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8 min read
S3 Lifecycle Policy Mistakes That Quietly Inflate Your AWS Bill
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S3 Lifecycle Policy Mistakes That Quietly Inflate Your AWS Bill

#aws #devops
1
Comments
7 min read
Ansible Zero-Downtime Deployment: Draining the Load Balancer Right
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Ansible Zero-Downtime Deployment: Draining the Load Balancer Right

#devops
1
Comments
8 min read
Cloudflare Origin Hardening Checklist: Firewall, Bots, Strict SSL
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Cloudflare Origin Hardening Checklist: Firewall, Bots, Strict SSL

#devops
1
Comments
8 min read
Nginx Rate Limiting vs API Gateway: Picking the Right Layer
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Nginx Rate Limiting vs API Gateway: Picking the Right Layer

#devops
1
Comments
8 min read
Docker BuildKit Cache Setup That Actually Speeds Up CI
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Docker BuildKit Cache Setup That Actually Speeds Up CI

#docker #devops
1
Comments
7 min read
RDS Backup Restore Testing: 7 Checks Before You Trust It
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RDS Backup Restore Testing: 7 Checks Before You Trust It

#devops
1
Comments
7 min read
EventBridge Retry Policy vs SQS DLQ: The Right Call in Production
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EventBridge Retry Policy vs SQS DLQ: The Right Call in Production

#devops
1
Comments
7 min read
GitHub Actions Reusable Workflow Environment Protection Checklist
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GitHub Actions Reusable Workflow Environment Protection Checklist

#cicd #devops
1
Comments
7 min read
Jenkins Shared Library Structure: vars/ vs src/ for Pipelines
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Jenkins Shared Library Structure: vars/ vs src/ for Pipelines

#cicd #devops
1
Comments
9 min read
Helm Rollback Strategy: Safe Values Promotion in Production
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Helm Rollback Strategy: Safe Values Promotion in Production

#kubernetes #devops
1
Comments
6 min read
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