Alexey Eremin’s BlogAWS engineering for SaaS companies. Understand costs per customer, improve margins, and make your platform easier to run with Alexey Eremin.https://ereminalexey.com/enThu, 15 Oct 2026 16:54:28 GMTLess frequent recording with AWS Config can cost more.https://ereminalexey.com/posts/aws-config-recording-costs/https://ereminalexey.com/posts/aws-config-recording-costs/One daily record must replace more than four continuous records to save money. Four is break-even.Sat, 10 Oct 2026 00:00:00 GMTAWSAWS ConfigCost OptimizationAlexey EreminScaling AI Code Review Without Scaling Your AWS Billhttps://ereminalexey.com/posts/scaling-ai-code-review/https://ereminalexey.com/posts/scaling-ai-code-review/How we rolled out AI code review across all repositories using CloudWatch alarms and an automatic Lambda circuit breaker to keep Bedrock costs under control.Wed, 20 May 2026 00:00:00 GMTAWSBedrockAICost OptimizationCI/CDAlexey EreminUnexpectedly Hard: Overcoming Pitfalls in aws_acm_certificate setuphttps://ereminalexey.com/posts/aws-acm-certificate/https://ereminalexey.com/posts/aws-acm-certificate/Encountering the “Invalid for_each argument” and “UnsupportedCertificate” errors when configuring AWS ACM certificates via Terraform is surprisingly common. By removing dynamic for_each logic based on unknown attributes and using the aws_acm_certificate_validation resource to wait for certificate issuance, you can sidestep these pitfalls and ensure successful integration with resources like ELB listeners.Wed, 19 Feb 2025 00:00:00 GMTACMRoute53AWSSecurityTerraformAlexey EreminGet Ready to Slice and Dice Your S3 Logs: Amazon S3 server access logging now supports automatic date-based partitioninghttps://ereminalexey.com/posts/s3-server-access-logging-date-partitioning/https://ereminalexey.com/posts/s3-server-access-logging-date-partitioning/Amazon S3 server access logging now supports automatic date-based partitioning for log delivery. This allows services like Amazon Athena to improve performance and reduce cost when querying logs.Sun, 14 Jul 2024 00:00:00 GMTS3AthenalogspartitioningAWSAlexey EreminIntroducing the Open-Source Terraform AWS SSO Elevator Module with Slack Integrationhttps://ereminalexey.com/posts/sso-elevator/https://ereminalexey.com/posts/sso-elevator/Open-source Terraform AWS SSO Elevator tool allows requesting and granting temporary elevated access for AWS SSO through a Slack request/approval workflow.Fri, 02 Jun 2023 00:00:00 GMTAWSSSO Elevatoropen sourceSlackAndrey Devyatkin, Alexey Eremin, Anton Eremin